chore(release): 4.13.0 [skip ci]

# [4.13.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.12.2...v4.13.0) (2026-06-25)

### Bug Fixes

* `UI/Additive` shader does not support RectMask2D softness. ([83145d3](83145d3a6e))
* rename `UIParticleProjectSettings.enableLinearToGamma` to `autoColorCorrection` ([10f82a8](10f82a8579))
* Support for skipping "reload domain" ([b7bb112](b7bb1124f6)), closes [#406](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/406)
* there is a compilation error in Unity 2019.2 or earlier ([c327632](c327632e1e)), closes [#407](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/407)

### Features

* add fields located outside the `Properties` block in the shader as `Animatable Properties` ([ea2fcfd](ea2fcfd809)), closes [#399](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/399)
* preview the ParticleSystem playback when selecting a UIParticle in the Editor ([108bcfb](108bcfbd24))
* project-wide default view size for baking ([8e0ff10](8e0ff10c73)), closes [#360](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/360)

.coffee.internal.sed

@@ -0,0 +1 @@
+s/Coffee.Internal/Coffee.UIParticleInternal/g

CHANGELOG.md

@@ -1,3 +1,146 @@
+# [4.13.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.12.2...v4.13.0) (2026-06-25)
+
+
+### Bug Fixes
+
+* `UI/Additive` shader does not support RectMask2D softness. ([83145d3](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/83145d3a6ede3831d1f7c49afde6ef7d8a498d21))
+* rename `UIParticleProjectSettings.enableLinearToGamma` to `autoColorCorrection` ([10f82a8](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/10f82a8579a2d055f897e7a8d6f3b5ba1fc43ae8))
+* Support for skipping "reload domain" ([b7bb112](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/b7bb1124f6921ebca1b48991462637767b95e504)), closes [#406](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/406)
+* there is a compilation error in Unity 2019.2 or earlier ([c327632](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/c327632e1eb203351ba1a1087a19eb7838c22530)), closes [#407](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/407)
+
+
+### Features
+
+* add fields located outside the `Properties` block in the shader as `Animatable Properties` ([ea2fcfd](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/ea2fcfd8099a24b92624d34600beb519fb9d2b38)), closes [#399](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/399)
+* preview the ParticleSystem playback when selecting a UIParticle in the Editor ([108bcfb](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/108bcfbd246960dc730546dc334424cf2e17bfd4))
+* project-wide default view size for baking ([8e0ff10](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/8e0ff10c7344d9f53d2f4f096ddeb7392b67f930)), closes [#360](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/360)
+
+## [4.12.2](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.12.1...v4.12.2) (2026-06-08)
+
+
+### Bug Fixes
+
+* add `meshCleared` flag to optimize mesh clearing ([859fa20](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/859fa20d297c3f44e3361f20dbb7ce966407e03e))
+* fix Unity6.5 compile errors and warnings ([a5ee687](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/a5ee6878212be2fc4d7b48879426f239e8753009)), closes [#400](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/400)
+* potential access to UIParticleRenderer that has already been destroyed ([b740dd6](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/b740dd662d423c6bef849662ce1b0bfbb4940ed4)), closes [#403](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/403)
+* updated support for some changed menu paths ([f8ac986](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/f8ac9869f141238169730e74f5d65c4fc6081f51)), closes [#397](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/397)
+
+## [4.12.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.12.0...v4.12.1) (2026-03-24)
+
+
+### Bug Fixes
+
+* ignore "EditorOnly" tagged gameObjects on refresh ([031d46a](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/031d46a3216c942d2d1a6ccfadf5f0b9e3ce3006))
+
+# [4.12.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.4...v4.12.0) (2026-03-24)
+
+
+### Features
+
+* explicit null checks ([5384f61](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/5384f61c569e9f78ff9d5b45acfc6f5c2f021a87))
+
+## [4.11.4](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.3...v4.11.4) (2025-12-24)
+
+
+### Bug Fixes
+
+* add early return for case where subEmitter module is disabled ([d1386a1](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/d1386a12216743a6e09f1b9b87bea1dfcf7702e4))
+* avoid endless loop ([eb2e862](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/eb2e862e80e549c8cf16ddfed776c101c2413bac)), closes [#392](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/392)
+
+## [4.11.3](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.2...v4.11.3) (2025-10-14)
+
+
+### Bug Fixes
+
+* fix icon ([a9461ec](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/a9461ecb4d40d7fe878e12465d6e38faae7ae65b))
+* fix URL link in README ([1c8c65d](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/1c8c65d25e7f6fe7b1d20da4461333df8fc7578e)), closes [#376](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/376)
+* fix: second and subsequent bursts not displayed when world simulation and non-looping ([df2f3ca](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/df2f3caafbe279f1457d74f8183cb561ac14aa17)), closes [#326](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/326)
+* UIParticle in canvas with 0f-0.01f alpha value does not start to play until alpha value is greater than 0.01f, causes play calls to be delayed unintentionally if canvas alpha value is set to mentioned value range ([38aec2e](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/38aec2ea1afd77677d629c86665a3342d92e49d9))
+
+## [4.11.2](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.1...v4.11.2) (2025-03-15)
+
+
+### Bug Fixes
+
+* IL2CPP build fails on older versions of Unity ([0da6525](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/0da652520cd165b43de7404c0b0ab1fbcf9349d1))
+* NRE on enable ([0cff50e](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/0cff50ef696aa53fb7c46a9a737b7cf3a05b7b9b)), closes [#359](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/359)
+
+## [4.11.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.0...v4.11.1) (2025-02-21)
+
+
+### Bug Fixes
+
+* component icons will no longer be displayed in the scene view ([6dfbdae](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/6dfbdae38d3822ab9c2c6f0e4ca1ca32ee98a239))
+
+# [4.11.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.7...v4.11.0) (2025-02-21)
+
+
+### Features
+
+* add 'TimeScaleMultiplier' option ([925af0b](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/925af0b6046f65f23a778f67cefa8ff9cbedb513))
+
+## [4.10.7](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.6...v4.10.7) (2025-01-14)
+
+
+### Bug Fixes
+
+* editor crashed on exit play mode (editor, windows) ([47ee45c](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/47ee45cbbe651a8f87ca2b8a3948f8b88db8211e)), closes [#351](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/351)
+
+## [4.10.6](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.5...v4.10.6) (2025-01-03)
+
+
+### Bug Fixes
+
+* sub-emitter particles may not render correctly in certain scenarios ([8276684](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/8276684c3b1646f0490ed64557547ba15281664a)), closes [#348](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/348)
+* sub-emitter's `inherit velocity` module doubles at runtime ([67de3d1](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/67de3d1bd3e16dc9b564625cb990c53d75769506)), closes [#349](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/349)
+
+## [4.10.5](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.4...v4.10.5) (2024-12-23)
+
+
+### Bug Fixes
+
+* '3D' scale toggle in the inspector does not keep on reload ([934f4b8](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/934f4b8f1c61f8ff20228d0ebcea9f636a3758ed)), closes [#346](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/346)
+
+## [4.10.4](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.3...v4.10.4) (2024-12-19)
+
+
+### Bug Fixes
+
+* rendering issues when playing with opening a prefab stage ([95235a9](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/95235a929b82cf681365ed6eba837d857f83e3d2)), closes [#345](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/345)
+
+## [4.10.3](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.2...v4.10.3) (2024-11-20)
+
+
+### Bug Fixes
+
+* if not configured as a preloaded asset, the project settings asset will be regenerated ([abe0948](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/abe09485f65dd4efd18e74675e752e0213bdf3be)), closes [#342](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/342)
+
+## [4.10.2](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.1...v4.10.2) (2024-11-01)
+
+
+### Bug Fixes
+
+* trail incorrect offset ([afe00a1](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/afe00a1dde80eb1c0a7bb668b75f4c3733d3fa43)), closes [#335](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/335)
+
+## [4.10.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.0...v4.10.1) (2024-09-29)
+
+
+### Bug Fixes
+
+* mainTex will be ignored ([2ee69d0](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/2ee69d04245fabce185f67dc9bd68c870e556564))
+
+# [4.10.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.9.1...v4.10.0) (2024-09-29)
+
+
+### Bug Fixes
+
+* component icon is not set ([5ff6ec8](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/5ff6ec815a174de5d3f16d424f1204c60912a8d8))
+
+
+### Features
+
+* add project settings ([1ce4e31](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/1ce4e31a9681bf1a201d2723c8d97e07ecc16592))
+
 ## [4.9.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.9.0...v4.9.1) (2024-08-07)
 
 

Editor/AnimatablePropertyEditor.cs

@@ -3,15 +3,19 @@ using System.Linq;
 using System.Text;
 using UnityEditor;
 using UnityEngine;
+using ShaderPropertyType = Coffee.UIExtensions.AnimatableProperty.ShaderPropertyType;
 
 namespace Coffee.UIExtensions
 {
     internal static class AnimatablePropertyEditor
     {
         private static readonly GUIContent s_ContentNothing = new GUIContent("Nothing");
+        private static readonly GUIContent s_ContentCustom = new GUIContent("Add Custom...");
         private static readonly List<string> s_ActiveNames = new List<string>();
         private static readonly StringBuilder s_Sb = new StringBuilder();
         private static readonly HashSet<string> s_Names = new HashSet<string>();
+        private static ShaderProperty s_CustomProperty = new ShaderProperty("", ShaderPropertyType.None);
+        private static bool s_ShowCustomProperty = false;
 
         private static string CollectActiveNames(SerializedProperty sp, List<string> result)
         {
@@ -51,8 +55,19 @@ namespace Coffee.UIExtensions
                 ? "-"
                 : CollectActiveNames(sp, s_ActiveNames);
 
-            if (!GUI.Button(rect, text, EditorStyles.popup)) return;
+            if (GUI.Button(rect, text, EditorStyles.popup))
+            {
+                ShowMenu(sp, mats);
+            }
 
+            if (s_ShowCustomProperty)
+            {
+                DrawCustomProperty(sp, ref s_CustomProperty);
+            }
+        }
+
+        private static void ShowMenu(SerializedProperty sp, List<Material> mats)
+        {
             var gm = new GenericMenu();
             gm.AddItem(s_ContentNothing, s_ActiveNames.Count == 0, x =>
             {
@@ -61,13 +76,20 @@ namespace Coffee.UIExtensions
                 current.serializedObject.ApplyModifiedProperties();
             }, sp);
 
+            gm.AddItem(s_ContentCustom, s_ShowCustomProperty, () =>
+            {
+                s_ShowCustomProperty = !s_ShowCustomProperty;
+                s_CustomProperty.Reset();
+            });
+            gm.AddSeparator("");
+
             if (!sp.hasMultipleDifferentValues)
             {
                 for (var i = 0; i < sp.arraySize; i++)
                 {
                     var p = sp.GetArrayElementAtIndex(i);
                     var name = p.FindPropertyRelative("m_Name").stringValue;
-                    var type = (AnimatableProperty.ShaderPropertyType)p.FindPropertyRelative("m_Type").intValue;
+                    var type = (ShaderPropertyType)p.FindPropertyRelative("m_Type").intValue;
                     AddMenu(gm, sp, new ShaderProperty(name, type), false);
                 }
             }
@@ -76,17 +98,26 @@ namespace Coffee.UIExtensions
             for (var j = 0; j < mats.Count; j++)
             {
                 var mat = mats[j];
-                if (!mat || !mat.shader) continue;
+                if (mat == null || mat.shader == null) continue;
 
+#if UNITY_6000_5_OR_NEWER
+                for (var i = 0; i < mat.shader.GetPropertyCount(); i++)
+#else
                 for (var i = 0; i < ShaderUtil.GetPropertyCount(mat.shader); i++)
+#endif
                 {
+#if UNITY_6000_5_OR_NEWER
+                    var name = mat.shader.GetPropertyName(i);
+                    var type = (ShaderPropertyType)mat.shader.GetPropertyType(i);
+#else
                     var name = ShaderUtil.GetPropertyName(mat.shader, i);
-                    var type = (AnimatableProperty.ShaderPropertyType)ShaderUtil.GetPropertyType(mat.shader, i);
+                    var type = (ShaderPropertyType)ShaderUtil.GetPropertyType(mat.shader, i);
+#endif
                     if (!s_Names.Add(name)) continue;
 
                     AddMenu(gm, sp, new ShaderProperty(name, type), true);
 
-                    if (type != AnimatableProperty.ShaderPropertyType.Texture) continue;
+                    if (type != ShaderPropertyType.Texture) continue;
 
                     AddMenu(gm, sp, new ShaderProperty($"{name}_ST"), true);
                     AddMenu(gm, sp, new ShaderProperty($"{name}_HDR"), true);
@@ -102,41 +133,82 @@ namespace Coffee.UIExtensions
             if (add && s_ActiveNames.Contains(prop.name)) return;
 
             var label = new GUIContent($"{prop.name} ({prop.type})");
-            menu.AddItem(label, s_ActiveNames.Contains(prop.name), () =>
+            menu.AddItem(label, s_ActiveNames.Contains(prop.name), () => AddProp(sp, prop));
-            {
+        }
-                var index = s_ActiveNames.IndexOf(prop.name);
-                if (0 <= index)
-                {
-                    sp.DeleteArrayElementAtIndex(index);
-                }
-                else
-                {
-                    sp.InsertArrayElementAtIndex(sp.arraySize);
-                    var p = sp.GetArrayElementAtIndex(sp.arraySize - 1);
-                    p.FindPropertyRelative("m_Name").stringValue = prop.name;
-                    p.FindPropertyRelative("m_Type").intValue = (int)prop.type;
-                }
 
-                sp.serializedObject.ApplyModifiedProperties();
+        private static void DrawCustomProperty(SerializedProperty sp, ref ShaderProperty prop)
-            });
+        {
+            var r = EditorGUILayout.GetControlRect(false, EditorGUIUtility.singleLineHeight + 8);
+            r.xMin += 60;
+            GUI.Label(r, (Texture)null, EditorStyles.helpBox);
+
+            r = new Rect(r.x + 4, r.y + 4, r.width - 8 - 100 - 16, r.height - 8);
+            prop.name = EditorGUI.TextField(r, prop.name);
+            r.x += r.width + 2;
+            r.width = 100 - 2;
+            prop.type = (ShaderPropertyType)EditorGUI.EnumPopup(r, prop.type);
+            r.x += r.width;
+            r.width = 16;
+
+            EditorGUI.BeginDisabledGroup(!prop.IsValid(s_ActiveNames));
+            if (GUI.Button(r, EditorGUIUtility.IconContent("Toolbar Plus"), EditorStyles.label))
+            {
+                GUI.FocusControl("");
+                AddProp(sp, prop);
+                prop.Reset();
+            }
+
+            EditorGUI.EndDisabledGroup();
+        }
+
+        private static void AddProp(SerializedProperty sp, ShaderProperty prop)
+        {
+            var index = s_ActiveNames.IndexOf(prop.name);
+            if (0 <= index)
+            {
+                sp.DeleteArrayElementAtIndex(index);
+            }
+            else
+            {
+                sp.InsertArrayElementAtIndex(sp.arraySize);
+                var p = sp.GetArrayElementAtIndex(sp.arraySize - 1);
+                p.FindPropertyRelative("m_Name").stringValue = prop.name;
+                p.FindPropertyRelative("m_Type").intValue = (int)prop.type;
+            }
+
+            sp.serializedObject.ApplyModifiedProperties();
         }
 
         private struct ShaderProperty
         {
-            public readonly string name;
+            public string name;
-            public readonly AnimatableProperty.ShaderPropertyType type;
+            public ShaderPropertyType type;
 
             public ShaderProperty(string name)
             {
                 this.name = name;
-                type = AnimatableProperty.ShaderPropertyType.Vector;
+                type = ShaderPropertyType.Vector;
             }
 
-            public ShaderProperty(string name, AnimatableProperty.ShaderPropertyType type)
+            public ShaderProperty(string name, ShaderPropertyType type)
             {
                 this.name = name;
                 this.type = type;
             }
+
+            public void Reset()
+            {
+                name = "";
+                type = ShaderPropertyType.None;
+            }
+
+            public bool IsValid(List<string> activeNames)
+            {
+                if (string.IsNullOrEmpty(name)) return false;
+                if (type == ShaderPropertyType.None) return false;
+                if (activeNames.Contains(name)) return false;
+                return true;
+            }
         }
     }
 }

Editor/UIParticleEditor.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text.RegularExpressions;
@@ -7,16 +8,16 @@ using UnityEditorInternal;
 using UnityEngine;
 using UnityEngine.Profiling;
 using UnityEngine.UI;
-using Coffee.UIParticleExtensions;
+using Coffee.UIParticleInternal;
+using Object = UnityEngine.Object;
 #if UNITY_2021_2_OR_NEWER
 using UnityEditor.Overlays;
 #else
-using System;
 using System.Reflection;
-using Object = UnityEngine.Object;
 #endif
 #if UNITY_2021_2_OR_NEWER
 using UnityEditor.SceneManagement;
+
 #elif UNITY_2018_3_OR_NEWER
 using UnityEditor.Experimental.SceneManagement;
 #endif
@@ -27,6 +28,11 @@ namespace Coffee.UIExtensions
     [CanEditMultipleObjects]
     internal class UIParticleEditor : GraphicEditor
     {
+        internal class State : ScriptableSingleton<State>
+        {
+            public bool is3DScaleMode;
+        }
+
         //################################
         // Constant or Static Members.
         //################################
@@ -43,9 +49,9 @@ namespace Coffee.UIExtensions
         private static readonly GUIContent s_ContentRandom = new GUIContent("Random");
         private static readonly GUIContent s_ContentScale = new GUIContent("Scale");
         private static readonly GUIContent s_ContentPrimary = new GUIContent("Primary");
+        private static readonly GUIContent s_ViewSize = new GUIContent("View Size");
         private static readonly Regex s_RegexBuiltInGuid = new Regex(@"^0{16}.0{15}$", RegexOptions.Compiled);
         private static readonly List<Material> s_TempMaterials = new List<Material>();
-        private static bool s_XYZMode;
 
         private SerializedProperty _maskable;
         private SerializedProperty _scale3D;
@@ -57,8 +63,11 @@ namespace Coffee.UIExtensions
         private SerializedProperty _autoScalingMode;
         private SerializedProperty _useCustomView;
         private SerializedProperty _customViewSize;
+        private SerializedProperty _timeScaleMultiplier;
         private ReorderableList _ro;
         private bool _showMax;
+        private bool _is3DScaleMode;
+        private GameObject[] _gameObjects;
 
         private static readonly HashSet<Shader> s_Shaders = new HashSet<Shader>();
 #if UNITY_2018 || UNITY_2019
@@ -94,6 +103,7 @@ namespace Coffee.UIExtensions
             _autoScalingMode = serializedObject.FindProperty("m_AutoScalingMode");
             _useCustomView = serializedObject.FindProperty("m_UseCustomView");
             _customViewSize = serializedObject.FindProperty("m_CustomViewSize");
+            _timeScaleMultiplier = serializedObject.FindProperty("m_TimeScaleMultiplier");
 
             var sp = serializedObject.FindProperty("m_Particles");
             _ro = new ReorderableList(sp.serializedObject, sp, true, true, true, true)
@@ -102,7 +112,7 @@ namespace Coffee.UIExtensions
                 {
                     var ps = sp.GetArrayElementAtIndex(index).objectReferenceValue as ParticleSystem;
                     var materialCount = 0;
-                    if (ps && ps.TryGetComponent<ParticleSystemRenderer>(out var psr))
+                    if (ps != null && ps.TryGetComponent<ParticleSystemRenderer>(out var psr))
                     {
                         materialCount = psr.sharedMaterials.Length;
                     }
@@ -116,7 +126,7 @@ namespace Coffee.UIExtensions
                     var p = sp.GetArrayElementAtIndex(index);
                     EditorGUI.ObjectField(rect, p, GUIContent.none);
                     var ps = p.objectReferenceValue as ParticleSystem;
-                    if (!ps || !ps.TryGetComponent<ParticleSystemRenderer>(out var psr)) return;
+                    if (ps == null || !ps.TryGetComponent<ParticleSystemRenderer>(out var psr)) return;
 
                     rect.x += 15;
                     rect.width -= 15;
@@ -162,6 +172,26 @@ namespace Coffee.UIExtensions
                     uip.RefreshParticles(uip.particles);
                 }
             }
+
+            // Initialize 3D scale mode.
+            _is3DScaleMode = State.instance.is3DScaleMode;
+            if (!_is3DScaleMode)
+            {
+                var x = _scale3D.FindPropertyRelative("x");
+                var y = _scale3D.FindPropertyRelative("y");
+                var z = _scale3D.FindPropertyRelative("z");
+                _is3DScaleMode = !Mathf.Approximately(x.floatValue, y.floatValue) ||
+                                 !Mathf.Approximately(y.floatValue, z.floatValue) ||
+                                 y.hasMultipleDifferentValues ||
+                                 z.hasMultipleDifferentValues;
+            }
+
+            // Add temporary ParticleSystem for preview if enabled.
+            if (UIParticleProjectSettings.previewOnSelect)
+            {
+                _gameObjects = targets.OfType<UIParticle>().Select(x => x.gameObject).ToArray();
+                ParticleSystemPreviewSystem.Register(_gameObjects);
+            }
         }
 
         /// <summary>
@@ -170,17 +200,24 @@ namespace Coffee.UIExtensions
         public override void OnInspectorGUI()
         {
             var current = target as UIParticle;
-            if (!current) return;
+            if (current == null) return;
 
             Profiler.BeginSample("(UIP:E) OnInspectorGUI");
             serializedObject.Update();
 
             // Maskable
-            EditorGUILayout.PropertyField(_maskable);
+            if (_maskable != null)
+            {
+                EditorGUILayout.PropertyField(_maskable);
+            }
 
             // Scale
             EditorGUI.BeginDisabledGroup(!_meshSharing.hasMultipleDifferentValues && _meshSharing.intValue == 4);
-            s_XYZMode = DrawFloatOrVector3Field(_scale3D, s_XYZMode);
+            if (DrawFloatOrVector3Field(_scale3D, _is3DScaleMode) != _is3DScaleMode)
+            {
+                State.instance.is3DScaleMode = _is3DScaleMode = !_is3DScaleMode;
+            }
+
             EditorGUI.EndDisabledGroup();
 
             // AnimatableProperties
@@ -210,16 +247,27 @@ namespace Coffee.UIExtensions
 
             // Custom View Size
             EditorGUILayout.PropertyField(_useCustomView);
-            EditorGUI.BeginChangeCheck();
-            EditorGUI.BeginDisabledGroup(!_useCustomView.boolValue);
             EditorGUI.indentLevel++;
-            EditorGUILayout.PropertyField(_customViewSize);
+            if (_useCustomView.boolValue)
-            EditorGUI.indentLevel--;
-            EditorGUI.EndDisabledGroup();
-            if (EditorGUI.EndChangeCheck())
             {
-                _customViewSize.floatValue = Mathf.Max(0.1f, _customViewSize.floatValue);
+                EditorGUI.BeginChangeCheck();
+                EditorGUILayout.PropertyField(_customViewSize);
+                if (EditorGUI.EndChangeCheck())
+                {
+                    _customViewSize.floatValue = Mathf.Max(0.1f, _customViewSize.floatValue);
+                }
             }
+            else
+            {
+                EditorGUI.BeginDisabledGroup(!_useCustomView.boolValue);
+                EditorGUILayout.FloatField(s_ViewSize, UIParticleProjectSettings.defaultViewSizeForBaking);
+                EditorGUI.EndDisabledGroup();
+            }
+
+            EditorGUI.indentLevel--;
+
+            // Time Scale Multiplier
+            EditorGUILayout.PropertyField(_timeScaleMultiplier);
 
             // Target ParticleSystems.
             EditorGUI.BeginChangeCheck();
@@ -239,7 +287,7 @@ namespace Coffee.UIExtensions
             Profiler.BeginSample("(UIP:E) Non-UI built-in shader is not supported.");
             foreach (var mat in s_TempMaterials)
             {
-                if (!mat || !mat.shader) continue;
+                if (mat == null || mat.shader == null) continue;
                 var shader = mat.shader;
                 if (IsBuiltInObject(shader) && !shader.name.StartsWith("UI/"))
                 {
@@ -258,7 +306,7 @@ namespace Coffee.UIExtensions
             {
                 foreach (var mat in s_TempMaterials)
                 {
-                    if (!mat || !mat.shader) continue;
+                    if (mat == null || mat.shader == null) continue;
                     var shader = mat.shader;
                     if (!s_Shaders.Add(shader)) continue;
 
@@ -316,6 +364,10 @@ namespace Coffee.UIExtensions
                 }
             }
 #endif
+
+            // Remove the temporary ParticleSystem.
+            ParticleSystemPreviewSystem.DrawWarningForTemporary(_gameObjects);
+
             Profiler.EndSample();
         }
 
@@ -454,7 +506,7 @@ namespace Coffee.UIExtensions
 #endif
         }
 
-        private static bool FixButton(bool show, string text)
+        private static bool FixButton(bool show, string text, GUIContent buttonText = null)
         {
             if (!show) return false;
             using (new EditorGUILayout.HorizontalScope(GUILayout.ExpandWidth(true)))
@@ -462,7 +514,7 @@ namespace Coffee.UIExtensions
                 EditorGUILayout.HelpBox(text, MessageType.Warning, true);
                 using (new EditorGUILayout.VerticalScope())
                 {
-                    return GUILayout.Button(s_ContentFix, GUILayout.Width(30));
+                    return GUILayout.Button(buttonText ?? s_ContentFix, GUILayout.ExpandWidth(false));
                 }
             }
         }

Editor/UIParticleMenu.cs

@@ -6,11 +6,22 @@ namespace Coffee.UIExtensions
 {
     internal class UIParticleMenu
     {
-        [MenuItem("GameObject/UI/Particle System (Empty)", false, 2018)]
+#if UNITY_6000_5_OR_NEWER
+        private const string k_MenuPathToCreateParticleSystem = "GameObject/Visual Effects/Particle System";
+#else
+        private const string k_MenuPathToCreateParticleSystem = "GameObject/Effects/Particle System";
+#endif
+#if UNITY_6000_3_OR_NEWER
+        private const string k_MenuPathForUgui = "GameObject/UI (Canvas)";
+#else
+        private const string k_MenuPathForUgui = "GameObject/UI";
+#endif
+
+        [MenuItem(k_MenuPathForUgui + "/Particle System (Empty)", false, 2018)]
         private static void AddParticleEmpty(MenuCommand menuCommand)
         {
             // Create empty UI element.
-            EditorApplication.ExecuteMenuItem("GameObject/UI/Image");
+            EditorApplication.ExecuteMenuItem(k_MenuPathForUgui + "/Image");
             var ui = Selection.activeGameObject;
             Object.DestroyImmediate(ui.GetComponent<Image>());
 
@@ -21,7 +32,7 @@ namespace Coffee.UIExtensions
             uiParticle.rectTransform.sizeDelta = Vector2.zero;
         }
 
-        [MenuItem("GameObject/UI/Particle System", false, 2019)]
+        [MenuItem(k_MenuPathForUgui + "/Particle System", false, 2019)]
         private static void AddParticle(MenuCommand menuCommand)
         {
             // Create empty UIEffect.
@@ -29,7 +40,7 @@ namespace Coffee.UIExtensions
             var uiParticle = Selection.activeGameObject.GetComponent<UIParticle>();
 
             // Create ParticleSystem.
-            EditorApplication.ExecuteMenuItem("GameObject/Effects/Particle System");
+            EditorApplication.ExecuteMenuItem(k_MenuPathToCreateParticleSystem);
             var ps = Selection.activeGameObject;
             ps.transform.SetParent(uiParticle.transform, false);
             ps.transform.localPosition = Vector3.zero;

LICENSE.md

@@ -1,4 +1,4 @@
-Copyright 2018-2024 mob-sakai
+Copyright 2018-2026 mob-sakai
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

README.md

@@ -34,6 +34,7 @@ You can render, mask, and sort your `ParticleSystems` for UI without the need fo
   - [Usage with `Mask` or `RectMask2D` Component](#usage-with-mask-or-rectmask2d-component)
   - [Usage with Script](#usage-with-script)
   - [Component: UIParticleAttractor](#component-uiparticleattractor)
+  - [Project Settings](#project-settings)
 - [🛠 Development Note](#-development-note)
   - [Compares the Baking mesh approach with the conventional approach](#compares-the-baking-mesh-approach-with-the-conventional-approach)
     - [Performance test results](#performance-test-results)
@@ -143,7 +144,7 @@ _This package requires **Unity 2018.3 or later**._
 
 #### Install as Embedded Package
 
-1. Download a source code zip file from [Releases](https://github.com/mob-sakai/ParticleEffectForUGUI.git/releases) and extract it.
+1. Download a source code zip file from [Releases](https://github.com/mob-sakai/ParticleEffectForUGUI/releases) and extract it.
 2. Place it in your project's `Packages` directory.  
    ![](https://github.com/mob-sakai/mob-sakai/assets/12690315/0b7484b4-5fca-43b0-a9ef-e5dbd99bcdb4)
 - If you want to fix bugs or add features, install it as an embedded package.
@@ -157,12 +158,18 @@ _This package requires **Unity 2018.3 or later**._
 
 `UIParticle` controls the ParticleSystems that are attached to its own game objects and child game objects.
 
-![](https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/1cf5753b-33fc-4cef-91c3-413c515a954f)
+![](https://github.com/user-attachments/assets/bc9eb783-afce-4102-ac61-aee9ea8d6f2f)
 
 - **Maskable**: Does this graphic allow maskable.
 - **Scale**: Scale the rendering particles. When the `3D` toggle is enabled, 3D scale (x, y, z) is supported.
 - **Animatable Properties**: If you want to update material properties (e.g., `_MainTex_ST`, `_Color`) in AnimationClip,
   use this to mark as animatable.
+
+> [!TIPS]
+> (Unity 2021.1 or later) **Custom Animatable Properties**  
+> From the `Add Custom...` menu in `Animatable Properties`, you can add fields located outside the `Properties` block in the shader as `Animatable Properties`.  
+> This allows `Matrix`, `Matrix Array`, `Float Array`, and `Vector Array` values modified by the `ParticleSystemRenderer.SetPropertyBlock` method to be automatically reflected in UIParticle.
+
 - **Mesh Sharing**: Particle simulation results are shared within the same group. A large number of the same effects can
   be displayed with a small load. When the `Random` toggle is enabled, it will be grouped randomly.
   - **None:** Disable mesh sharing.
@@ -179,11 +186,17 @@ _This package requires **Unity 2018.3 or later**._
   - **UIParticle:** UIParticle.scale will be adjusted.
 - **Use Custom View:** Use this if the particles are not displayed correctly due to min/max particle size.
   - **Custom view size:** Change the bake view size.
+- **Time Scale Multiplier:** Time scale multiplier.
 - **Rendering Order**: The ParticleSystem list to be rendered. You can change the order and the materials.
 
-**NOTE:** Press the `Refresh` button to reconstruct the rendering order based on children ParticleSystem's sorting order
+> [!TIPS]
+> Press the `Refresh` button to reconstruct the rendering order based on children ParticleSystem's sorting order
 and z-position.
 
+> [!TIPS]
+> When a `GameObject` with this component is selected in the editor, a temporary `ParticleSystem` is added if needed so you can preview the effect in the Scene view.
+> The generated `ParticleSystem` is marked with `HideFlags.DontSave`, so it is neither saved nor included in builds.
+
 <br><br>
 
 ### Basic Usage
@@ -193,6 +206,10 @@ and z-position.
 2. Adjust the ParticleSystem as you like.
    ![particle1](https://user-images.githubusercontent.com/12690315/95007359-ca385200-0649-11eb-8383-627c9750bda8.png)
 
+> [!Tips]
+> Adding a `UIParticle` to the parent is the recommended setup rather than attaching it directly to the `ParticleSystem`.
+> When using `ParticleSystem.emission.rateOverDistance`, it is recommended to move the transform of `UIParticle` rather than the `ParticleSystem`.
+
 <br>
 
 ### Usage with Your Existing ParticleSystem Prefab
@@ -209,7 +226,7 @@ and z-position.
 If you want to mask particles, set a stencil-supported shader (such as `UI/UIAdditive`) to the material for
 ParticleSystem.
 If you use some custom shaders, see
-the [How to Make a Custom Shader to Support Mask/RectMask2D Component](#how-to-make-a-custom-shader-to-support-maskrectmask2d-component)
+the [How to Make a Custom Shader to Support Mask/RectMask2D Component](#how-to-make-a-custom-shader-to-support-mask-and-rectmask2d-component)
 section.
 
 ![](https://user-images.githubusercontent.com/12690315/95017591-3b512700-0695-11eb-864e-04166ea1809a.png)
@@ -254,6 +271,36 @@ uiParticle.Stop();
     - **Unscaled Time:** Update with unscaled delta time.
 - **OnAttracted**: An event called when attracting is complete (per particle).
 
+
+<br><br>
+
+### Component: ParticleSystemPreviewer
+
+`ParticleSystemPreviewer` is used to preview a ParticleSystem in the editor.
+
+- When a `GameObject` with this component is selected in the editor, a temporary `ParticleSystem` is added if needed so you can preview the effect in the Scene view.
+- The generated `ParticleSystem` is marked with `HideFlags.DontSave`, so it is neither saved nor included in builds.
+
+
+<br><br>
+
+### Project Settings
+
+You can adjust the project-wide settings for `UI Particle`. (`Edit > Project Settings > UI > UI Particle`)
+
+![](https://github.com/mob-sakai/mob-sakai/releases/download/docs/1782360274340.png)
+
+#### Settings
+
+- **Enable Linear To Gamma**: Automatically correct the color space of the mesh.
+- **Default View Size For Baking**: Default view size for baking particle systems.
+
+#### Editor
+
+- **Hide Generated Component**: Automatically hide the generated `UIParticleRenderer` component and `UIParticle BakingCamera`.
+
+- **Preview On Select**: When selecting UIParticle, a temporary ParticleSystem is generated for preview.
+
 <br><br>
 
 ## 🛠 Development Note
@@ -317,33 +364,39 @@ uiParticle.Stop();
 
 ### 🔍 FAQ: Why Are My UIParticles Not Displayed Correctly?
 
+See [this issue](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/270).
+
 If `ParticleSystem` alone displays particles correctly but `UIParticle` does not, please check the following points:
 
-- [Shader Limitation](#shader-limitation)
+- [Shader Limitation](https://github.com/mob-sakai/ParticleEffectForUGUI#shader-limitation)
-    - `UIParticle` does not support all built-in shaders except for `UI/Default`.
     - Most cases can be solved by using `UI/Additive` or `UI/Default`.
 - Particles are not masked
     - `UIParticle` is maskable.
+    - Use maskable/clipable shader (such as `UI/Additive` or `UI/Default`)
     - Set `Mask` or `RectMask2D` component properly.
-    - [Use maskable/clipable shader](#how-to-make-a-custom-shader-to-support-maskrectmask2d-component) (such
-      as `UI/Additive` or `UI/Default`)
 - Particles are too small
     - If particles are small enough, they will not appear on the screen.
     - Increase the `Scale` value.
     - If you don't want to change the apparent size depending on the resolution, try the `Auto Scaling` option.
 - Particles are too many
     - No more than 65535 vertices can be displayed (for mesh combination limitations).
-    - Please set `Emission` module and `Max Particles` of ParticleSystem properly.
+    - Please set `Emission` module and `Max Particles` of `ParticleSystem` properly.
 - Particles are emitted off-screen.
-    - When `Position Mode = Relative`, particles are emitted from the scaled position of the ParticleSystem, not from
+    - When `Position Mode = Relative`, particles are emitted from the scaled position of the `ParticleSystem`, not from
-      the screen point of the ParticleSystem.
+      the screen point of the `ParticleSystem`.
-    - Place the ParticleSystem in the proper position or try `Position Mode = Absolute`.
+    - Place the `ParticleSystem` in the proper position or try `Position Mode = Absolute`.
 - Attaching `UIParticle` to the same object as `ParticleSystem`
     - `Transform.localScale` will be overridden by the `Auto Scaling` option.
     - It is recommended to place `ParticleSystem` under `UIParticle`.
 - If `Transform.localScale` contains 0, rendering will be skipped.
+- If you are using `Shape` module, please check whether the scale includes 0.
 - Displayed particles are in the correct position but too large/too small
     - Adjust `ParticleSystem.renderer.Min/MaxParticleSize`.
+- If `Trails.RibbonCount` is greater than 1, the following error occurs frequently.
+  - `Failed setting triangles. Some indices are referencing out of bounds vertices. IndexCount: 660, VertexCount: 222`
+- Adding a `UIParticle` to the parent is the recommended setup rather than attaching it directly to the `ParticleSystem`.
+  - When using `ParticleSystem.emission.rateOverDistance`, it is recommended to move the transform of `UIParticle` rather than the `ParticleSystem`.
+- (v4.13.0, v5.0.0-preview.18) Try changing the `Default View Size For Baking` setting under `ProjectSettings > UI > UI Particle` to a value such as 100 or 1000.
 
 <br>
 

Runtime/AnimatableProperty.cs

@@ -8,11 +8,18 @@ namespace Coffee.UIExtensions
     {
         public enum ShaderPropertyType
         {
+            None = -1,
             Color,
             Vector,
             Float,
             Range,
-            Texture
+            Texture,
+            Int,
+
+            Matrix = 100,
+            MatrixArray = 101,
+            FloatArray = 102,
+            VectorArray = 103,
         }
 
         [SerializeField] private string m_Name = "";
@@ -32,42 +39,41 @@ namespace Coffee.UIExtensions
 
         public void UpdateMaterialProperties(Material material, MaterialPropertyBlock mpb)
         {
+#if UNITY_2021_1_OR_NEWER
+            if (!mpb.HasProperty(id)) return;
+#else
             if (!material.HasProperty(id)) return;
+#endif
 
             switch (type)
             {
                 case ShaderPropertyType.Color:
-                    var color = mpb.GetColor(id);
+                    material.SetColor(id, mpb.GetColor(id));
-                    if (color != default)
-                    {
-                        material.SetColor(id, color);
-                    }
-
                     break;
                 case ShaderPropertyType.Vector:
-                    var vector = mpb.GetVector(id);
+                    material.SetVector(id, mpb.GetVector(id));
-                    if (vector != default)
-                    {
-                        material.SetVector(id, vector);
-                    }
-
                     break;
                 case ShaderPropertyType.Float:
                 case ShaderPropertyType.Range:
-                    var value = mpb.GetFloat(id);
+                    material.SetFloat(id, mpb.GetFloat(id));
-                    if (!Mathf.Approximately(value, 0))
-                    {
-                        material.SetFloat(id, value);
-                    }
-
                     break;
                 case ShaderPropertyType.Texture:
-                    var tex = mpb.GetTexture(id);
+                    material.SetTexture(id, mpb.GetTexture(id));
-                    if (tex != default(Texture))
+                    break;
-                    {
+                case ShaderPropertyType.Int:
-                        material.SetTexture(id, tex);
+                    material.SetInt(id, mpb.GetInt(id));
-                    }
+                    break;
-
+                case ShaderPropertyType.Matrix:
+                    material.SetMatrix(id, mpb.GetMatrix(id));
+                    break;
+                case ShaderPropertyType.MatrixArray:
+                    material.SetMatrixArray(id, mpb.GetMatrixArray(id));
+                    break;
+                case ShaderPropertyType.FloatArray:
+                    material.SetFloatArray(id, mpb.GetFloatArray(id));
+                    break;
+                case ShaderPropertyType.VectorArray:
+                    material.SetVectorArray(id, mpb.GetVectorArray(id));
                     break;
             }
         }

Runtime/Coffee.UIParticle.R.dll.meta

@@ -0,0 +1,33 @@
+fileFormatVersion: 2
+guid: 4d73b3825bf044d418ae21bb331d3902
+PluginImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  iconMap: {}
+  executionOrder: {}
+  defineConstraints: []
+  isPreloaded: 0
+  isOverridable: 1
+  isExplicitlyReferenced: 0
+  validateReferences: 1
+  platformData:
+  - first:
+      Any: 
+    second:
+      enabled: 1
+      settings: {}
+  - first:
+      Editor: Editor
+    second:
+      enabled: 0
+      settings:
+        DefaultValueInitialized: true
+  - first:
+      Windows Store Apps: WindowsStoreApps
+    second:
+      enabled: 0
+      settings:
+        CPU: AnyCPU
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Internal.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 7a55e246f37df405bac88eac692e3a86
+guid: 53aa3f36032944b3fb1455e774c52396
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}

Runtime/Internal/Extensions.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 8cf8018dee45a4c42a19eec890eaa5b1
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Internal/Extensions/CanvasExtensions.cs

@@ -0,0 +1,134 @@
+#if UNITY_2021_3_0 || UNITY_2021_3_1 || UNITY_2021_3_2 || UNITY_2021_3_3 || UNITY_2021_3_4 || UNITY_2021_3_5 || UNITY_2021_3_6 || UNITY_2021_3_7 || UNITY_2021_3_8 || UNITY_2021_3_9
+#elif UNITY_2021_3_10 || UNITY_2021_3_11 || UNITY_2021_3_12 || UNITY_2021_3_13 || UNITY_2021_3_14 || UNITY_2021_3_15 || UNITY_2021_3_16 || UNITY_2021_3_17 || UNITY_2021_3_18 || UNITY_2021_3_19
+#elif UNITY_2021_3_20 || UNITY_2021_3_21 || UNITY_2021_3_22 || UNITY_2021_3_23 || UNITY_2021_3_24 || UNITY_2021_3_25 || UNITY_2021_3_26 || UNITY_2021_3_27 || UNITY_2021_3_28 || UNITY_2021_3_29
+#elif UNITY_2021_3_30 || UNITY_2021_3_31 || UNITY_2021_3_32 || UNITY_2021_3_33
+#elif UNITY_2022_2_0 || UNITY_2022_2_1 || UNITY_2022_2_2 || UNITY_2022_2_3 || UNITY_2022_2_4 || UNITY_2022_2_5 || UNITY_2022_2_6 || UNITY_2022_2_7 || UNITY_2022_2_8 || UNITY_2022_2_9
+#elif UNITY_2022_2_10 || UNITY_2022_2_11 || UNITY_2022_2_12 || UNITY_2022_2_13 || UNITY_2022_2_14
+#elif UNITY_2021_3 || UNITY_2022_2 || UNITY_2022_3 || UNITY_2023_2_OR_NEWER
+#define CANVAS_SUPPORT_ALWAYS_GAMMA
+#endif
+
+using UnityEngine;
+using UnityEngine.Profiling;
+#if UNITY_MODULE_VR
+using UnityEngine.XR;
+#endif
+
+namespace Coffee.UIParticleInternal
+{
+    internal static class CanvasExtensions
+    {
+        public static bool ShouldGammaToLinearInShader(this Canvas canvas)
+        {
+            return QualitySettings.activeColorSpace == ColorSpace.Linear &&
+#if CANVAS_SUPPORT_ALWAYS_GAMMA
+                   canvas.vertexColorAlwaysGammaSpace;
+#else
+                   false;
+#endif
+        }
+
+        public static bool ShouldGammaToLinearInMesh(this Canvas canvas)
+        {
+            return QualitySettings.activeColorSpace == ColorSpace.Linear &&
+#if CANVAS_SUPPORT_ALWAYS_GAMMA
+                   !canvas.vertexColorAlwaysGammaSpace;
+#else
+                   true;
+#endif
+        }
+
+        public static bool IsStereoCanvas(this Canvas canvas)
+        {
+#if UNITY_MODULE_VR
+            if (FrameCache.TryGet<bool>(canvas, nameof(IsStereoCanvas), out var stereo)) return stereo;
+
+            stereo =
+                canvas != null && canvas.renderMode != RenderMode.ScreenSpaceOverlay && canvas.worldCamera != null
+                && XRSettings.enabled && !string.IsNullOrEmpty(XRSettings.loadedDeviceName);
+            FrameCache.Set(canvas, nameof(IsStereoCanvas), stereo);
+            return stereo;
+#else
+            return false;
+#endif
+        }
+
+        /// <summary>
+        /// Gets the view-projection matrix for a Canvas.
+        /// </summary>
+        public static void GetViewProjectionMatrix(this Canvas canvas, out Matrix4x4 vpMatrix)
+        {
+            canvas.GetViewProjectionMatrix(Camera.MonoOrStereoscopicEye.Mono, out vpMatrix);
+        }
+
+        /// <summary>
+        /// Gets the view-projection matrix for a Canvas.
+        /// </summary>
+        public static void GetViewProjectionMatrix(this Canvas canvas, Camera.MonoOrStereoscopicEye eye,
+            out Matrix4x4 vpMatrix)
+        {
+            if (FrameCache.TryGet(canvas, nameof(GetViewProjectionMatrix), out vpMatrix)) return;
+
+            canvas.GetViewProjectionMatrix(eye, out var viewMatrix, out var projectionMatrix);
+            vpMatrix = viewMatrix * projectionMatrix;
+            FrameCache.Set(canvas, nameof(GetViewProjectionMatrix), vpMatrix);
+        }
+
+        /// <summary>
+        /// Gets the view and projection matrices for a Canvas.
+        /// </summary>
+        public static void GetViewProjectionMatrix(this Canvas canvas, out Matrix4x4 vMatrix, out Matrix4x4 pMatrix)
+        {
+            canvas.GetViewProjectionMatrix(Camera.MonoOrStereoscopicEye.Mono, out vMatrix, out pMatrix);
+        }
+
+        /// <summary>
+        /// Gets the view and projection matrices for a Canvas.
+        /// </summary>
+        public static void GetViewProjectionMatrix(this Canvas canvas, Camera.MonoOrStereoscopicEye eye,
+            out Matrix4x4 vMatrix, out Matrix4x4 pMatrix)
+        {
+            if (FrameCache.TryGet(canvas, "GetViewMatrix", (int)eye, out vMatrix) &&
+                FrameCache.TryGet(canvas, "GetProjectionMatrix", (int)eye, out pMatrix))
+            {
+                return;
+            }
+
+            // Get view and projection matrices.
+            Profiler.BeginSample("(COF)[CanvasExt] GetViewProjectionMatrix");
+            var rootCanvas = canvas.rootCanvas;
+            var cam = rootCanvas.worldCamera;
+            if (rootCanvas != null && rootCanvas.renderMode != RenderMode.ScreenSpaceOverlay && cam != null)
+            {
+                if (eye == Camera.MonoOrStereoscopicEye.Mono)
+                {
+                    vMatrix = cam.worldToCameraMatrix;
+                    pMatrix = GL.GetGPUProjectionMatrix(cam.projectionMatrix, false);
+                }
+                else
+                {
+                    pMatrix = cam.GetStereoProjectionMatrix((Camera.StereoscopicEye)eye);
+                    vMatrix = cam.GetStereoViewMatrix((Camera.StereoscopicEye)eye);
+                    pMatrix = GL.GetGPUProjectionMatrix(pMatrix, false);
+                }
+            }
+            else
+            {
+                var pos = rootCanvas.transform.position;
+                vMatrix = Matrix4x4.TRS(
+                    new Vector3(-pos.x, -pos.y, -1000),
+                    Quaternion.identity,
+                    new Vector3(1, 1, -1f));
+                pMatrix = Matrix4x4.TRS(
+                    new Vector3(0, 0, -1),
+                    Quaternion.identity,
+                    new Vector3(1 / pos.x, 1 / pos.y, -2 / 10000f));
+            }
+
+            FrameCache.Set(canvas, "GetViewMatrix", (int)eye, vMatrix);
+            FrameCache.Set(canvas, "GetProjectionMatrix", (int)eye, pMatrix);
+
+            Profiler.EndSample();
+        }
+    }
+}

Runtime/Internal/Extensions/CanvasExtensions.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: d188d31b140094ebc84a9caafbc7ac71
+guid: 9dd767b8c0f95478386e7d5079cd44df
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Runtime/Internal/Extensions/Color32Extensions.cs

@@ -0,0 +1,77 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Profiling;
+
+namespace Coffee.UIParticleInternal
+{
+    internal static class Color32Extensions
+    {
+        private static readonly List<Color32> s_Colors = new List<Color32>();
+        private static byte[] s_LinearToGammaLut;
+        private static byte[] s_GammaToLinearLut;
+
+        public static byte LinearToGamma(this byte self)
+        {
+            if (s_LinearToGammaLut == null)
+            {
+                s_LinearToGammaLut = new byte[256];
+                for (var i = 0; i < 256; i++)
+                {
+                    s_LinearToGammaLut[i] = (byte)(Mathf.LinearToGammaSpace(i / 255f) * 255f);
+                }
+            }
+
+            return s_LinearToGammaLut[self];
+        }
+
+        public static byte GammaToLinear(this byte self)
+        {
+            if (s_GammaToLinearLut == null)
+            {
+                s_GammaToLinearLut = new byte[256];
+                for (var i = 0; i < 256; i++)
+                {
+                    s_GammaToLinearLut[i] = (byte)(Mathf.GammaToLinearSpace(i / 255f) * 255f);
+                }
+            }
+
+            return s_GammaToLinearLut[self];
+        }
+
+        public static void LinearToGamma(this Mesh self)
+        {
+            Profiler.BeginSample("(COF)[ColorExt] LinearToGamma (Mesh)");
+            self.GetColors(s_Colors);
+            var count = s_Colors.Count;
+            for (var i = 0; i < count; i++)
+            {
+                var c = s_Colors[i];
+                c.r = c.r.LinearToGamma();
+                c.g = c.g.LinearToGamma();
+                c.b = c.b.LinearToGamma();
+                s_Colors[i] = c;
+            }
+
+            self.SetColors(s_Colors);
+            Profiler.EndSample();
+        }
+
+        public static void GammaToLinear(this Mesh self)
+        {
+            Profiler.BeginSample("(COF)[ColorExt] GammaToLinear (Mesh)");
+            self.GetColors(s_Colors);
+            var count = s_Colors.Count;
+            for (var i = 0; i < count; i++)
+            {
+                var c = s_Colors[i];
+                c.r = c.r.GammaToLinear();
+                c.g = c.g.GammaToLinear();
+                c.b = c.b.GammaToLinear();
+                s_Colors[i] = c;
+            }
+
+            self.SetColors(s_Colors);
+            Profiler.EndSample();
+        }
+    }
+}

Runtime/Internal/Extensions/Color32Extensions.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: b0beae5bb1cb142b9ab90dc0d371f026
+guid: 0ef431b9df32c410ea5fa46be81def6b
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Runtime/Internal/Extensions/ComponentExtensions.cs

@@ -0,0 +1,254 @@
+using System;
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.Profiling;
+using Object = UnityEngine.Object;
+
+namespace Coffee.UIParticleInternal
+{
+    /// <summary>
+    /// Extension methods for Component class.
+    /// </summary>
+    internal static class ComponentExtensions
+    {
+#if !UNITY_2019_2_OR_NEWER
+        public static bool TryGetComponent<T>(this GameObject self, out T component)
+            where T : Component
+        {
+            if (self == null)
+            {
+                component = null;
+                return false;
+            }
+
+            component = self.GetComponent<T>();
+            return component != null;
+        }
+
+        public static bool TryGetComponent<T>(this Component self, out T component)
+            where T : Component
+        {
+            if (self == null)
+            {
+                component = null;
+                return false;
+            }
+
+            return self.gameObject.TryGetComponent(out component);
+        }
+#endif
+
+        /// <summary>
+        /// Get components in children of a specific type in the hierarchy of a GameObject.
+        /// </summary>
+        public static T[] GetComponentsInChildren<T>(this Component self, int depth)
+            where T : Component
+        {
+            var results = InternalListPool<T>.Rent();
+            self.GetComponentsInChildren_Internal(results, depth);
+            var array = results.ToArray();
+            InternalListPool<T>.Return(ref results);
+            return array;
+        }
+
+        /// <summary>
+        /// Get components in children of a specific type in the hierarchy of a GameObject.
+        /// </summary>
+        public static void GetComponentsInChildren<T>(this Component self, List<T> results, int depth)
+            where T : Component
+        {
+            results.Clear();
+            self.GetComponentsInChildren_Internal(results, depth);
+        }
+
+        private static void GetComponentsInChildren_Internal<T>(this Component self, List<T> results, int depth)
+            where T : Component
+        {
+            if (self == null || results == null || depth < 0) return;
+
+            var tr = self.transform;
+            if (tr.TryGetComponent<T>(out var t))
+            {
+                results.Add(t);
+            }
+
+            if (depth - 1 < 0) return;
+            var childCount = tr.childCount;
+            for (var i = 0; i < childCount; i++)
+            {
+                tr.GetChild(i).GetComponentsInChildren_Internal(results, depth - 1);
+            }
+        }
+
+        /// <summary>
+        /// Get or add a component of a specific type to a GameObject.
+        /// </summary>
+        public static T GetOrAddComponent<T>(this Component self) where T : Component
+        {
+            if (self == null) return null;
+            return self.TryGetComponent<T>(out var component)
+                ? component
+                : self.gameObject.AddComponent<T>();
+        }
+
+        /// <summary>
+        /// Get the root component of a specific type in the hierarchy of a GameObject.
+        /// </summary>
+        public static T GetRootComponent<T>(this Component self) where T : Component
+        {
+            T component = null;
+            var transform = self.transform;
+            while (transform != null)
+            {
+                if (transform.TryGetComponent<T>(out var c))
+                {
+                    component = c;
+                }
+
+                transform = transform.parent;
+            }
+
+            return component;
+        }
+
+        /// <summary>
+        /// Get a component of a specific type in the parent hierarchy of a GameObject.
+        /// </summary>
+        public static T GetComponentInParent<T>(this Component self, bool includeSelf, Transform stopAfter,
+            Predicate<T> valid)
+            where T : Component
+        {
+            var tr = includeSelf ? self.transform : self.transform.parent;
+            while (tr != null)
+            {
+                if (tr.TryGetComponent<T>(out var c) && valid(c)) return c;
+                if (tr == stopAfter) return null;
+                tr = tr.parent;
+            }
+
+            return null;
+        }
+
+        /// <summary>
+        /// Add a component of a specific type to the children of a GameObject.
+        /// </summary>
+        public static void AddComponentOnChildren<T>(this Component self, HideFlags hideFlags, bool includeSelf)
+            where T : Component
+        {
+            if (self == null) return;
+
+            Profiler.BeginSample("(COF)[ComponentExt] AddComponentOnChildren > Self");
+            if (includeSelf && !self.TryGetComponent<T>(out _))
+            {
+                var c = self.gameObject.AddComponent<T>();
+                c.hideFlags = hideFlags;
+            }
+
+            Profiler.EndSample();
+
+            Profiler.BeginSample("(COF)[ComponentExt] AddComponentOnChildren > Child");
+            var childCount = self.transform.childCount;
+            for (var i = 0; i < childCount; i++)
+            {
+                var child = self.transform.GetChild(i);
+                if (child.TryGetComponent<T>(out _)) continue;
+
+                var c = child.gameObject.AddComponent<T>();
+                c.hideFlags = hideFlags;
+            }
+
+            Profiler.EndSample();
+        }
+
+        /// <summary>
+        /// Add a component of a specific type to the children of a GameObject.
+        /// </summary>
+        public static void AddComponentOnChildren<T>(this Component self, bool includeSelf)
+            where T : Component
+        {
+            if (self == null) return;
+
+            Profiler.BeginSample("(COF)[ComponentExt] AddComponentOnChildren > Self");
+            if (includeSelf && !self.TryGetComponent<T>(out _))
+            {
+                self.gameObject.AddComponent<T>();
+            }
+
+            Profiler.EndSample();
+
+            Profiler.BeginSample("(COF)[ComponentExt] AddComponentOnChildren > Child");
+            var childCount = self.transform.childCount;
+            for (var i = 0; i < childCount; i++)
+            {
+                var child = self.transform.GetChild(i);
+                if (child.TryGetComponent<T>(out _)) continue;
+
+                child.gameObject.AddComponent<T>();
+            }
+
+            Profiler.EndSample();
+        }
+
+#if !UNITY_2021_2_OR_NEWER && !UNITY_2020_3_45 && !UNITY_2020_3_46 && !UNITY_2020_3_47 && !UNITY_2020_3_48
+        public static T GetComponentInParent<T>(this Component self, bool includeInactive) where T : Component
+        {
+            if (self == null) return null;
+            if (!includeInactive) return self.GetComponentInParent<T>();
+
+            var current = self.transform;
+            while (current != null)
+            {
+                if (current.TryGetComponent<T>(out var c)) return c;
+                current = current.parent;
+            }
+
+            return null;
+        }
+#endif
+
+#if UNITY_EDITOR
+        /// <summary>
+        /// Verify whether it can be converted to the specified component.
+        /// </summary>
+        internal static bool CanConvertTo<T>(this Object context) where T : MonoBehaviour
+        {
+            return context != null && context.GetType() != typeof(T);
+        }
+
+        /// <summary>
+        /// Convert to the specified component.
+        /// </summary>
+        internal static void ConvertTo<T>(this Object context) where T : MonoBehaviour
+        {
+            var target = context as MonoBehaviour;
+            if (target == null) return;
+
+            var so = new SerializedObject(target);
+            so.Update();
+
+            var oldEnable = target.enabled;
+            target.enabled = false;
+
+            // Find MonoScript of the specified component.
+            foreach (var script in MonoImporter.GetAllRuntimeMonoScripts())
+            {
+                if (script.GetClass() != typeof(T))
+                {
+                    continue;
+                }
+
+                // Set 'm_Script' to convert.
+                so.FindProperty("m_Script").objectReferenceValue = script;
+                so.ApplyModifiedProperties();
+                break;
+            }
+
+            if (so.targetObject is MonoBehaviour mb)
+            {
+                mb.enabled = oldEnable;
+            }
+        }
+#endif
+    }
+}

Runtime/Internal/Extensions/ComponentExtensions.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 8455ee485a5ee4cacbdf558f66af65fb
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Internal/Extensions/SpriteExtensions.cs

@@ -0,0 +1,60 @@
+using System;
+using UnityEngine;
+using UnityEngine.U2D;
+#if UNITY_EDITOR
+using System.Reflection;
+#endif
+
+namespace Coffee.UIParticleInternal
+{
+    /// <summary>
+    /// Extension methods for Sprite class.
+    /// </summary>
+    internal static class SpriteExtensions
+    {
+#if UNITY_EDITOR
+        private static readonly Type s_SpriteEditorExtensionType =
+            Type.GetType("UnityEditor.Experimental.U2D.SpriteEditorExtension, UnityEditor")
+            ?? Type.GetType("UnityEditor.U2D.SpriteEditorExtension, UnityEditor");
+
+        private static readonly Func<Sprite, Texture2D> s_GetActiveAtlasTextureMethod =
+            (Func<Sprite, Texture2D>)Delegate.CreateDelegate(typeof(Func<Sprite, Texture2D>),
+                s_SpriteEditorExtensionType
+                    .GetMethod("GetActiveAtlasTexture", BindingFlags.Static | BindingFlags.NonPublic));
+
+        private static readonly Func<Sprite, SpriteAtlas> s_GetActiveAtlasMethod =
+            (Func<Sprite, SpriteAtlas>)Delegate.CreateDelegate(typeof(Func<Sprite, SpriteAtlas>),
+                s_SpriteEditorExtensionType
+                    .GetMethod("GetActiveAtlas", BindingFlags.Static | BindingFlags.NonPublic));
+
+        /// <summary>
+        /// Get the actual texture of a sprite in play mode or edit mode.
+        /// </summary>
+        public static Texture2D GetActualTexture(this Sprite self)
+        {
+            if (self == null) return null;
+
+            var ret = s_GetActiveAtlasTextureMethod(self);
+            return ret != null ? ret : self.texture;
+        }
+
+        /// <summary>
+        /// Get the active sprite atlas of a sprite in play mode or edit mode.
+        /// </summary>
+        public static SpriteAtlas GetActiveAtlas(this Sprite self)
+        {
+            if (self == null) return null;
+
+            return s_GetActiveAtlasMethod(self);
+        }
+#else
+        /// <summary>
+        /// Get the actual texture of a sprite in play mode.
+        /// </summary>
+        internal static Texture2D GetActualTexture(this Sprite self)
+        {
+            return self != null ? self.texture : null;
+        }
+#endif
+    }
+}

Runtime/Internal/Extensions/SpriteExtensions.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: a7a2e11131111447cb7fc0394a14da65
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Internal/Extensions/Vector3Extensions.cs

@@ -0,0 +1,46 @@
+using UnityEngine;
+
+namespace Coffee.UIParticleInternal
+{
+    internal static class Vector3Extensions
+    {
+        public static Vector3 Inverse(this Vector3 self)
+        {
+            self.x = Mathf.Approximately(self.x, 0) ? 1 : 1 / self.x;
+            self.y = Mathf.Approximately(self.y, 0) ? 1 : 1 / self.y;
+            self.z = Mathf.Approximately(self.z, 0) ? 1 : 1 / self.z;
+            return self;
+        }
+
+        public static Vector3 GetScaled(this Vector3 self, Vector3 other1)
+        {
+            self.Scale(other1);
+            return self;
+        }
+
+        public static Vector3 GetScaled(this Vector3 self, Vector3 other1, Vector3 other2)
+        {
+            self.Scale(other1);
+            self.Scale(other2);
+            return self;
+        }
+
+        public static Vector3 GetScaled(this Vector3 self, Vector3 other1, Vector3 other2, Vector3 other3)
+        {
+            self.Scale(other1);
+            self.Scale(other2);
+            self.Scale(other3);
+            return self;
+        }
+
+        public static bool IsVisible(this Vector3 self)
+        {
+            return 0 < Mathf.Abs(self.x * self.y * self.z);
+        }
+
+        public static bool IsVisible2D(this Vector3 self)
+        {
+            return 0 < Mathf.Abs(self.x * self.y);
+        }
+    }
+}

Runtime/Internal/Extensions/Vector3Extensions.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 6a7b5fb989e4b48c8bc7ecce834060f5
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Internal/ProjectSettings.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 398e06c9985ad4291a95f0749c2927fb
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Internal/ProjectSettings/PreloadedProjectSettings.cs

@@ -0,0 +1,333 @@
+using System;
+using System.Linq;
+using UnityEngine;
+using Object = UnityEngine.Object;
+#if UNITY_EDITOR
+using System.IO;
+using UnityEditor;
+using UnityEditor.Build;
+using UnityEditor.Build.Reporting;
+#endif
+
+namespace Coffee.UIParticleInternal
+{
+    public abstract class PreloadedProjectSettings : ScriptableObject
+#if UNITY_EDITOR
+    {
+        [Tooltip("When enabled, this settings asset will be added to PlayerSettings.preloadedAssets in build.\n\n" +
+                 "When disable, you should load this settings via Resources, AssetBundles or Addressables to use.")]
+        [SerializeField]
+        [Header("Advanced")]
+        [HideInInspector]
+        private bool m_PreLoadSettingsInBuild = true;
+
+        protected static bool s_BuildingPlayer;
+
+        private class EditorEvents : AssetPostprocessor, IPreprocessBuildWithReport, IPostprocessBuildWithReport
+        {
+            int IOrderedCallback.callbackOrder => 0;
+
+            private static void OnPostprocessAllAssets(string[] _, string[] __, string[] ___, string[] ____)
+            {
+                Initialize();
+            }
+
+            void IPreprocessBuildWithReport.OnPreprocessBuild(BuildReport report)
+            {
+                AssetDatabase.Refresh();
+                Initialize();
+                s_BuildingPlayer = true;
+
+                foreach (var t in TypeCache.GetTypesDerivedFrom(typeof(PreloadedProjectSettings<>)))
+                {
+                    var settings = GetDefaultSettings(t);
+                    if (settings == null || settings.m_PreLoadSettingsInBuild) continue;
+
+                    PlayerSettings.SetPreloadedAssets(
+                        PlayerSettings.GetPreloadedAssets()
+                            .Where(x => x != null && x.GetType() != t)
+                            .ToArray());
+
+                    Debug.Log($"[PreloadedProjectSettings] Build started: removed '{settings.name}' " +
+                              $"({t.Name}) from PreloadedAssets. " +
+                              $"It will be restored after build completes.");
+                }
+            }
+
+            void IPostprocessBuildWithReport.OnPostprocessBuild(BuildReport report)
+            {
+                s_BuildingPlayer = false;
+                Initialize();
+            }
+
+#if UNITY_2019_3_OR_NEWER
+            [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+            private static void OnDomainReload()
+            {
+                foreach (var t in TypeCache.GetTypesDerivedFrom(typeof(PreloadedProjectSettings<>)))
+                {
+                    var defaultSettings = GetDefaultSettings(t);
+                    if (defaultSettings != null)
+                    {
+                        defaultSettings.OnDomainReload();
+                    }
+                }
+            }
+#endif
+        }
+
+        private static void Initialize()
+        {
+            foreach (var t in TypeCache.GetTypesDerivedFrom(typeof(PreloadedProjectSettings<>)))
+            {
+                var defaultSettings = GetDefaultSettings(t);
+                if (defaultSettings == null)
+                {
+                    if (!s_BuildingPlayer)
+                    {
+                        // When create a new instance, automatically set it as default settings.
+                        defaultSettings = CreateInstance(t) as PreloadedProjectSettings;
+                        SetDefaultSettings(defaultSettings);
+                    }
+                }
+                else if (GetPreloadedSettings(t).Length != 1)
+                {
+                    if (!s_BuildingPlayer) SetDefaultSettings(defaultSettings);
+                }
+
+                if (defaultSettings != null)
+                {
+                    defaultSettings.OnInitialize();
+                }
+            }
+        }
+
+        protected static string GetDefaultName(Type type, bool nicify)
+        {
+            var typeName = type.Name;
+            return nicify
+                ? ObjectNames.NicifyVariableName(typeName)
+                : typeName;
+        }
+
+        private static Object[] GetPreloadedSettings(Type type)
+        {
+            return PlayerSettings.GetPreloadedAssets()
+                .Where(x => x != null && x.GetType() == type)
+                .ToArray();
+        }
+
+        protected static PreloadedProjectSettings GetDefaultSettings(Type type)
+        {
+            return GetPreloadedSettings(type).FirstOrDefault() as PreloadedProjectSettings
+                   ?? AssetDatabase.FindAssets($"t:{type.Name}")
+                       .Select(AssetDatabase.GUIDToAssetPath)
+                       .Select(AssetDatabase.LoadAssetAtPath<PreloadedProjectSettings>)
+                       .FirstOrDefault(x => x != null && x.GetType() == type);
+        }
+
+        protected static void SetDefaultSettings(PreloadedProjectSettings asset)
+        {
+            if (asset == null) return;
+
+            var type = asset.GetType();
+            if (string.IsNullOrEmpty(AssetDatabase.GetAssetPath(asset)))
+            {
+                if (!AssetDatabase.IsValidFolder("Assets/ProjectSettings"))
+                {
+                    AssetDatabase.CreateFolder("Assets", "ProjectSettings");
+                }
+
+                var assetPath = $"Assets/ProjectSettings/{GetDefaultName(type, false)}.asset";
+                assetPath = AssetDatabase.GenerateUniqueAssetPath(assetPath);
+                if (!File.Exists(assetPath))
+                {
+                    AssetDatabase.CreateAsset(asset, assetPath);
+                    asset.OnCreateAsset();
+                }
+            }
+
+            var preloadedAssets = PlayerSettings.GetPreloadedAssets();
+            var projectSettings = GetPreloadedSettings(type);
+            PlayerSettings.SetPreloadedAssets(preloadedAssets
+                .Where(x => x != null)
+                .Except(projectSettings.Except(new[] { asset }))
+                .Append(asset)
+                .Distinct()
+                .ToArray());
+
+            AssetDatabase.Refresh();
+        }
+
+        protected virtual void OnCreateAsset()
+        {
+        }
+
+        protected virtual void OnInitialize()
+        {
+        }
+
+        protected virtual void OnDomainReload()
+        {
+        }
+    }
+
+    internal abstract class PreloadedProjectSettingsEditor : Editor
+    {
+        private SerializedProperty _preLoadSettingsInBuild;
+
+        protected virtual void OnEnable()
+        {
+            _preLoadSettingsInBuild = serializedObject.FindProperty("m_PreLoadSettingsInBuild");
+        }
+
+        protected void DrawPreLoadSettingsInBuild(string packageName)
+        {
+            EditorGUILayout.PropertyField(_preLoadSettingsInBuild);
+            if (!_preLoadSettingsInBuild.boolValue)
+            {
+                EditorGUILayout.BeginHorizontal();
+                EditorGUILayout.HelpBox(
+                    $"{target.GetType().Name} asset will not be built in.\n" +
+                    $"please load manually from Resources, AssetBundle, or Addressables before using {packageName}.",
+                    MessageType.Warning);
+                if (GUILayout.Button("Ping"))
+                {
+                    EditorGUIUtility.PingObject(target);
+                }
+
+                EditorGUILayout.EndHorizontal();
+            }
+        }
+    }
+#else
+    {
+    }
+#endif
+
+    public abstract class PreloadedProjectSettings<T> : PreloadedProjectSettings
+        where T : PreloadedProjectSettings<T>
+    {
+        private static T s_Instance;
+
+#if UNITY_EDITOR
+        private string _jsonText;
+
+        public static bool hasInstance => s_Instance != null;
+
+        public static T instance
+        {
+            get
+            {
+                if (s_Instance != null) return s_Instance;
+
+                s_Instance = GetDefaultSettings(typeof(T)) as T;
+                if (s_Instance != null) return s_Instance;
+
+                s_Instance = CreateInstance<T>();
+                if (s_Instance == null)
+                {
+                    s_Instance = null;
+                    return s_Instance;
+                }
+
+                if (!s_BuildingPlayer) SetDefaultSettings(s_Instance);
+                return s_Instance;
+            }
+        }
+
+        private void OnPlayModeStateChanged(PlayModeStateChange state)
+        {
+            if (this == null) return;
+
+            switch (state)
+            {
+                case PlayModeStateChange.ExitingEditMode:
+                    _jsonText = EditorJsonUtility.ToJson(this);
+                    break;
+                case PlayModeStateChange.ExitingPlayMode:
+                    if (_jsonText != null)
+                    {
+                        EditorJsonUtility.FromJsonOverwrite(_jsonText, this);
+                        _jsonText = null;
+                    }
+
+                    break;
+            }
+        }
+
+        protected override void OnDomainReload()
+        {
+            s_Instance = null;
+        }
+#else
+        public static T instance => s_Instance != null ? s_Instance : s_Instance = CreateInstance<T>();
+#endif
+
+        /// <summary>
+        /// This function is called when the object becomes enabled and active.
+        /// </summary>
+        protected virtual void OnEnable()
+        {
+#if UNITY_EDITOR
+            var isDefaultSettings = s_Instance == null || s_Instance == this || GetDefaultSettings(typeof(T)) == this;
+            if (!isDefaultSettings)
+            {
+                DestroyImmediate(this, true);
+                return;
+            }
+
+            EditorApplication.playModeStateChanged -= OnPlayModeStateChanged;
+            EditorApplication.playModeStateChanged += OnPlayModeStateChanged;
+#else
+            if (s_Instance != null && s_Instance != this)
+            {
+                Destroy(s_Instance);
+            }
+#endif
+            s_Instance = this as T;
+        }
+
+        /// <summary>
+        /// This function is called when the behaviour becomes disabled.
+        /// </summary>
+        protected virtual void OnDisable()
+        {
+#if UNITY_EDITOR
+            EditorApplication.playModeStateChanged -= OnPlayModeStateChanged;
+#endif
+            if (s_Instance != this) return;
+
+            s_Instance = null;
+        }
+
+#if UNITY_EDITOR
+        protected sealed class PreloadedProjectSettingsProvider : SettingsProvider
+        {
+            private Editor _editor;
+            private PreloadedProjectSettings<T> _target;
+
+            public PreloadedProjectSettingsProvider(string path) : base(path, SettingsScope.Project)
+            {
+            }
+
+            public override void OnGUI(string searchContext)
+            {
+                if (_target == null)
+                {
+                    if (_editor != null)
+                    {
+                        DestroyImmediate(_editor);
+                        _editor = null;
+                    }
+
+                    _target = instance;
+                    _editor = Editor.CreateEditor(_target);
+                }
+
+                _editor.OnInspectorGUI();
+            }
+        }
+#endif
+    }
+}

Runtime/Internal/ProjectSettings/PreloadedProjectSettings.cs.meta

@@ -0,0 +1,11 @@
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+guid: 790ea008741dc411497c8794745319eb
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Runtime/Internal/Utilities.meta

@@ -0,0 +1,8 @@
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+DefaultImporter:
+  externalObjects: {}
+  userData: 
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+  assetBundleVariant: 

Runtime/Internal/Utilities/FastAction.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Profiling;
+
+namespace Coffee.UIParticleInternal
+{
+    /// <summary>
+    /// Base class for a fast action.
+    /// </summary>
+    internal class FastActionBase<T>
+    {
+        private static readonly InternalObjectPool<LinkedListNode<T>> s_NodePool =
+            new InternalObjectPool<LinkedListNode<T>>(() => new LinkedListNode<T>(default), _ => true,
+                x => x.Value = default);
+
+        private readonly LinkedList<T> _delegates = new LinkedList<T>();
+
+        /// <summary>
+        /// Adds a delegate to the action.
+        /// </summary>
+        public void Add(T rhs)
+        {
+            if (rhs == null) return;
+            Profiler.BeginSample("(COF)[FastAction] Add Action");
+            var node = s_NodePool.Rent();
+            node.Value = rhs;
+            _delegates.AddLast(node);
+            Profiler.EndSample();
+        }
+
+        /// <summary>
+        /// Removes a delegate from the action.
+        /// </summary>
+        public void Remove(T rhs)
+        {
+            if (rhs == null) return;
+            Profiler.BeginSample("(COF)[FastAction] Remove Action");
+            var node = _delegates.Find(rhs);
+            if (node != null)
+            {
+                _delegates.Remove(node);
+                s_NodePool.Return(ref node);
+            }
+
+            Profiler.EndSample();
+        }
+
+        /// <summary>
+        /// Invokes the action with a callback function.
+        /// </summary>
+        protected void Invoke(Action<T> callback)
+        {
+            var node = _delegates.First;
+            while (node != null)
+            {
+                try
+                {
+                    callback(node.Value);
+                }
+                catch (Exception e)
+                {
+                    Debug.LogException(e);
+                }
+
+                node = node.Next;
+            }
+        }
+    }
+
+    /// <summary>
+    /// A fast action without parameters.
+    /// </summary>
+    internal class FastAction : FastActionBase<Action>
+    {
+        /// <summary>
+        /// Invoke all the registered delegates.
+        /// </summary>
+        public void Invoke()
+        {
+            Invoke(action => action.Invoke());
+        }
+    }
+}

Runtime/Internal/Utilities/FastAction.cs.meta

@@ -0,0 +1,11 @@
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+guid: a7c8c268a827b4787a8e050f1fe95ad5
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
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+  icon: {instanceID: 0}
+  userData: 
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+  assetBundleVariant: 

Runtime/Internal/Utilities/FrameCache.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Coffee.UIParticleInternal
+{
+    internal static class FrameCache
+    {
+        private static readonly Dictionary<Type, IFrameCache> s_Caches = new Dictionary<Type, IFrameCache>();
+
+#if UNITY_EDITOR && UNITY_2019_3_OR_NEWER
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+#elif UNITY_EDITOR
+        [InitializeOnLoadMethod]
+#else
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
+#endif
+        private static void Clear()
+        {
+            s_Caches.Clear();
+            UIExtraCallbacks.onLateAfterCanvasRebuild -= ClearAllCache;
+            UIExtraCallbacks.onLateAfterCanvasRebuild += ClearAllCache;
+        }
+
+        /// <summary>
+        /// Tries to retrieve a value from the frame cache with a specified key.
+        /// </summary>
+        public static bool TryGet<T>(object key1, string key2, out T result)
+        {
+            return GetFrameCache<T>().TryGet((key1.GetHashCode(), key2.GetHashCode()), out result);
+        }
+
+        /// <summary>
+        /// Tries to retrieve a value from the frame cache with a specified key.
+        /// </summary>
+        public static bool TryGet<T>(object key1, string key2, int key3, out T result)
+        {
+            return GetFrameCache<T>().TryGet((key1.GetHashCode(), key2.GetHashCode() + key3), out result);
+        }
+
+        /// <summary>
+        /// Sets a value in the frame cache with a specified key.
+        /// </summary>
+        public static void Set<T>(object key1, string key2, T result)
+        {
+            GetFrameCache<T>().Set((key1.GetHashCode(), key2.GetHashCode()), result);
+        }
+
+        /// <summary>
+        /// Sets a value in the frame cache with a specified key.
+        /// </summary>
+        public static void Set<T>(object key1, string key2, int key3, T result)
+        {
+            GetFrameCache<T>().Set((key1.GetHashCode(), key2.GetHashCode() + key3), result);
+        }
+
+        private static void ClearAllCache()
+        {
+            foreach (var cache in s_Caches.Values)
+            {
+                cache.Clear();
+            }
+        }
+
+        private static FrameCacheContainer<T> GetFrameCache<T>()
+        {
+            var t = typeof(T);
+            if (s_Caches.TryGetValue(t, out var frameCache)) return frameCache as FrameCacheContainer<T>;
+
+            frameCache = new FrameCacheContainer<T>();
+            s_Caches.Add(t, frameCache);
+
+            return (FrameCacheContainer<T>)frameCache;
+        }
+
+        private interface IFrameCache
+        {
+            void Clear();
+        }
+
+        private class FrameCacheContainer<T> : IFrameCache
+        {
+            private readonly Dictionary<(int, int), T> _caches = new Dictionary<(int, int), T>();
+
+            public void Clear()
+            {
+                _caches.Clear();
+            }
+
+            public bool TryGet((int, int) key, out T result)
+            {
+                return _caches.TryGetValue(key, out result);
+            }
+
+            public void Set((int, int) key, T result)
+            {
+                _caches[key] = result;
+            }
+        }
+    }
+}

Runtime/Internal/Utilities/FrameCache.cs.meta

@@ -0,0 +1,11 @@
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+guid: 5f129e3b07ffb4d3bbb4cc5f6bd94087
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Internal/Utilities/Logger.cs

@@ -0,0 +1,254 @@
+using System;
+using System.Text;
+using UnityEngine;
+using Object = UnityEngine.Object;
+#if ENABLE_COFFEE_LOGGER
+using System.Reflection;
+using System.Collections.Generic;
+#else
+using Conditional = System.Diagnostics.ConditionalAttribute;
+#endif
+
+namespace Coffee.UIParticleInternal
+{
+    internal static class Logger
+    {
+#if !ENABLE_COFFEE_LOGGER
+        private const string k_DisableSymbol = "DISABLE_COFFEE_LOGGER";
+
+        [Conditional(k_DisableSymbol)]
+#endif
+        private static void Log_Internal(LogType type, object tag, object message, Object context)
+        {
+#if ENABLE_COFFEE_LOGGER
+            AppendTag(s_Sb, tag);
+            s_Sb.Append(message);
+            switch (type)
+            {
+                case LogType.Error:
+                case LogType.Assert:
+                case LogType.Exception:
+                    Debug.LogError(s_Sb, context);
+                    break;
+                case LogType.Warning:
+                    Debug.LogWarning(s_Sb, context);
+                    break;
+                case LogType.Log:
+                    Debug.Log(s_Sb, context);
+                    break;
+            }
+
+            s_Sb.Length = 0;
+#endif
+        }
+
+#if !ENABLE_COFFEE_LOGGER
+        [Conditional(k_DisableSymbol)]
+#endif
+        public static void LogIf(bool enable, object tag, object message, Object context = null)
+        {
+            if (!enable) return;
+            Log_Internal(LogType.Log, tag, message, context != null ? context : tag as Object);
+        }
+
+#if !ENABLE_COFFEE_LOGGER
+        [Conditional(k_DisableSymbol)]
+#endif
+        public static void Log(object tag, object message, Object context = null)
+        {
+            Log_Internal(LogType.Log, tag, message, context != null ? context : tag as Object);
+        }
+
+#if !ENABLE_COFFEE_LOGGER
+        [Conditional(k_DisableSymbol)]
+#endif
+        public static void LogWarning(object tag, object message, Object context = null)
+        {
+            Log_Internal(LogType.Warning, tag, message, context != null ? context : tag as Object);
+        }
+
+        public static void LogError(object tag, object message, Object context = null)
+        {
+#if ENABLE_COFFEE_LOGGER
+            Log_Internal(LogType.Error, tag, message, context != null ? context : tag as Object);
+#else
+            Debug.LogError($"{tag}: {message}", context);
+#endif
+        }
+
+#if !ENABLE_COFFEE_LOGGER
+        [Conditional(k_DisableSymbol)]
+#endif
+        public static void LogMulticast(Type type, string fieldName, object instance = null, string message = null)
+        {
+#if ENABLE_COFFEE_LOGGER
+            AppendTag(s_Sb, instance ?? type);
+
+            var handler = type
+                .GetField(fieldName,
+                    BindingFlags.Static | BindingFlags.Instance | BindingFlags.Static | BindingFlags.NonPublic)
+                ?.GetValue(instance);
+
+            var list = ((MulticastDelegate)handler)?.GetInvocationList() ?? Array.Empty<Delegate>();
+            s_Sb.Append("<color=orange>");
+            s_Sb.Append(type.Name);
+            s_Sb.Append(".");
+            s_Sb.Append(fieldName);
+            s_Sb.Append(" has ");
+            s_Sb.Append(list.Length);
+            s_Sb.Append(" callbacks");
+            if (message != null)
+            {
+                s_Sb.Append(" (");
+                s_Sb.Append(message);
+                s_Sb.Append(")");
+            }
+
+            s_Sb.Append(":</color>");
+
+            for (var i = 0; i < list.Length; i++)
+            {
+                s_Sb.Append("\n - ");
+                s_Sb.Append(list[i].Method.DeclaringType?.Name);
+                s_Sb.Append(".");
+                s_Sb.Append(list[i].Method.Name);
+            }
+
+            Debug.Log(s_Sb);
+            s_Sb.Length = 0;
+#endif
+        }
+
+#if !ENABLE_COFFEE_LOGGER
+        [Conditional(k_DisableSymbol)]
+#endif
+        private static void AppendTag(StringBuilder sb, object tag)
+        {
+#if ENABLE_COFFEE_LOGGER
+            try
+            {
+                sb.Append("f");
+                sb.Append(Time.frameCount);
+                sb.Append(":<color=#");
+                AppendReadableCode(sb, tag);
+                sb.Append("><b>[");
+
+                switch (tag)
+                {
+                    case string name:
+                        sb.Append(name);
+                        break;
+                    case Type type:
+                        AppendType(sb, type);
+                        break;
+                    case Object uObject:
+                        AppendType(sb, tag.GetType());
+                        sb.Append(" #");
+                        sb.Append(uObject.name);
+                        break;
+                    default:
+                        AppendType(sb, tag.GetType());
+                        break;
+                }
+
+                sb.Append("]</b></color> ");
+            }
+            catch
+            {
+                sb.Append("f");
+                sb.Append(Time.frameCount);
+                sb.Append(":<b>[");
+                sb.Append(tag);
+                sb.Append("]</b> ");
+            }
+#endif
+        }
+
+#if !ENABLE_COFFEE_LOGGER
+        [Conditional(k_DisableSymbol)]
+#endif
+        private static void AppendType(StringBuilder sb, Type type)
+        {
+#if ENABLE_COFFEE_LOGGER
+            if (s_TypeNameCache.TryGetValue(type, out var name))
+            {
+                sb.Append(name);
+                return;
+            }
+
+            // New type found
+            var start = sb.Length;
+            if (0 < start && sb[start - 1] == '<' && (type.Name == "Material" || type.Name == "Color"))
+            {
+                sb.Append('@');
+            }
+
+            sb.Append(type.Name);
+            if (type.IsGenericType)
+            {
+                sb.Length -= 2;
+                sb.Append("<");
+                foreach (var gType in type.GetGenericArguments())
+                {
+                    AppendType(sb, gType);
+                    sb.Append(", ");
+                }
+
+                sb.Length -= 2;
+                sb.Append(">");
+            }
+
+            s_TypeNameCache.Add(type, sb.ToString(start, sb.Length - start));
+#endif
+        }
+
+#if !ENABLE_COFFEE_LOGGER
+        [Conditional(k_DisableSymbol)]
+#endif
+        private static void AppendReadableCode(StringBuilder sb, object tag)
+        {
+#if ENABLE_COFFEE_LOGGER
+            int hash;
+            try
+            {
+                switch (tag)
+                {
+                    case string text:
+                        hash = text.GetHashCode();
+                        break;
+                    case Type type:
+                        type = type.IsGenericType ? type.GetGenericTypeDefinition() : type;
+                        hash = type.FullName?.GetHashCode() ?? 0;
+                        break;
+                    default:
+                        hash = tag.GetType().FullName?.GetHashCode() ?? 0;
+                        break;
+                }
+            }
+            catch
+            {
+                sb.Append("FFFFFF");
+                return;
+            }
+
+            hash = hash & (s_Codes.Length - 1);
+            if (s_Codes[hash] == null)
+            {
+                var hue = hash / (float)s_Codes.Length;
+                var modifier = 1f - Mathf.Clamp01(Mathf.Abs(hue - 0.65f) / 0.2f);
+                var saturation = 0.7f + modifier * -0.2f;
+                var value = 0.8f + modifier * 0.3f;
+                s_Codes[hash] = ColorUtility.ToHtmlStringRGB(Color.HSVToRGB(hue, saturation, value));
+            }
+
+            sb.Append(s_Codes[hash]);
+#endif
+        }
+
+#if ENABLE_COFFEE_LOGGER
+        private static readonly StringBuilder s_Sb = new StringBuilder();
+        private static readonly string[] s_Codes = new string[64];
+        private static readonly Dictionary<Type, string> s_TypeNameCache = new Dictionary<Type, string>();
+#endif
+    }
+}

Runtime/Internal/Utilities/Logger.cs.meta

@@ -0,0 +1,11 @@
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+  serializedVersion: 2
+  defaultReferences: []
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+  userData: 
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+  assetBundleVariant: 

Runtime/Internal/Utilities/MaterialRepository.cs

@@ -0,0 +1,94 @@
+using System;
+using UnityEngine;
+using UnityEngine.Profiling;
+
+namespace Coffee.UIParticleInternal
+{
+    /// <summary>
+    /// Provides functionality to manage materials.
+    /// </summary>
+    internal static class MaterialRepository
+    {
+        private static readonly ObjectRepository<Material> s_Repository = new ObjectRepository<Material>();
+
+        public static int count => s_Repository.count;
+
+        public static Func<string, Shader> onShaderFind = Shader.Find;
+
+#if UNITY_EDITOR && UNITY_2019_3_OR_NEWER
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        public static void Clear()
+        {
+            s_Repository.Clear();
+        }
+#endif
+
+        /// <summary>
+        /// Retrieves a cached material based on the hash.
+        /// </summary>
+        public static bool Valid(Hash128 hash, Material material)
+        {
+            Profiler.BeginSample("(COF)[MaterialRegistry] Valid");
+            var ret = s_Repository.Valid(hash, material);
+            Profiler.EndSample();
+            return ret;
+        }
+
+        /// <summary>
+        /// Adds or retrieves a cached material based on the hash.
+        /// </summary>
+        public static void Get(Hash128 hash, ref Material material, Func<Material> onCreate)
+        {
+            Profiler.BeginSample("(COF)[MaterialRepository] Get");
+            s_Repository.Get(hash, ref material, onCreate);
+            Profiler.EndSample();
+        }
+
+        /// <summary>
+        /// Adds or retrieves a cached material based on the hash.
+        /// </summary>
+        public static void Get(Hash128 hash, ref Material material, string shaderName)
+        {
+            Profiler.BeginSample("(COF)[MaterialRepository] Get");
+            s_Repository.Get(hash, ref material, x => new Material(onShaderFind(x))
+            {
+                hideFlags = HideFlags.DontSave | HideFlags.NotEditable
+            }, shaderName);
+            Profiler.EndSample();
+        }
+
+        /// <summary>
+        /// Adds or retrieves a cached material based on the hash.
+        /// </summary>
+        public static void Get(Hash128 hash, ref Material material, string shaderName, string[] keywords)
+        {
+            Profiler.BeginSample("(COF)[MaterialRepository] Get");
+            s_Repository.Get(hash, ref material, x => new Material(onShaderFind(x.shaderName))
+            {
+                hideFlags = HideFlags.DontSave | HideFlags.NotEditable,
+                shaderKeywords = x.keywords
+            }, (shaderName, keywords));
+            Profiler.EndSample();
+        }
+
+        /// <summary>
+        /// Adds or retrieves a cached material based on the hash.
+        /// </summary>
+        public static void Get<T>(Hash128 hash, ref Material material, Func<T, Material> onCreate, T source)
+        {
+            Profiler.BeginSample("(COF)[MaterialRepository] Get");
+            s_Repository.Get(hash, ref material, onCreate, source);
+            Profiler.EndSample();
+        }
+
+        /// <summary>
+        /// Removes a soft mask material from the cache.
+        /// </summary>
+        public static void Release(ref Material material)
+        {
+            Profiler.BeginSample("(COF)[MaterialRepository] Release");
+            s_Repository.Release(ref material);
+            Profiler.EndSample();
+        }
+    }
+}

Runtime/Internal/Utilities/MaterialRepository.cs.meta

@@ -0,0 +1,11 @@
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+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
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+  assetBundleVariant: 

Runtime/Internal/Utilities/Misc.cs

@@ -0,0 +1,129 @@
+using System;
+using System.Diagnostics;
+using UnityEditor;
+using UnityEngine;
+using Object = UnityEngine.Object;
+#if UNITY_EDITOR
+using System.IO;
+using System.Linq;
+using System.Reflection;
+#if UNITY_2021_2_OR_NEWER
+using UnityEditor.SceneManagement;
+#else
+using UnityEditor.Experimental.SceneManagement;
+#endif
+#endif
+
+namespace Coffee.UIParticleInternal
+{
+    internal static class Misc
+    {
+        public static T[] FindObjectsOfType<T>() where T : Object
+        {
+#if UNITY_6000_4_OR_NEWER
+            return Object.FindObjectsByType<T>(FindObjectsInactive.Include);
+#elif UNITY_2023_1_OR_NEWER
+            return Object.FindObjectsByType<T>(FindObjectsInactive.Include, FindObjectsSortMode.None);
+#else
+            return Object.FindObjectsOfType<T>();
+#endif
+        }
+
+        public static void Destroy(Object obj)
+        {
+            if (obj == null) return;
+#if UNITY_EDITOR
+            if (!Application.isPlaying)
+            {
+                Object.DestroyImmediate(obj);
+            }
+            else
+#endif
+            {
+                Object.Destroy(obj);
+            }
+        }
+
+        public static void DestroyImmediate(Object obj)
+        {
+            if (obj == null) return;
+#if UNITY_EDITOR
+            Object.DestroyImmediate(obj, true);
+#else
+            Object.Destroy(obj);
+#endif
+        }
+
+        [Conditional("UNITY_EDITOR")]
+        public static void SetDirty(Object obj)
+        {
+#if UNITY_EDITOR
+            if (obj == null) return;
+            EditorUtility.SetDirty(obj);
+#endif
+        }
+
+#if UNITY_EDITOR
+        public static T[] GetAllComponentsInPrefabStage<T>() where T : Component
+        {
+            var prefabStage = PrefabStageUtility.GetCurrentPrefabStage();
+            if (prefabStage == null) return Array.Empty<T>();
+
+            return prefabStage.prefabContentsRoot.GetComponentsInChildren<T>(true);
+        }
+
+        public static bool isBatchOrBuilding => Application.isBatchMode || BuildPipeline.isBuildingPlayer;
+#endif
+
+        [Conditional("UNITY_EDITOR")]
+        public static void QueuePlayerLoopUpdate()
+        {
+#if UNITY_EDITOR
+            if (!EditorApplication.isPlaying)
+            {
+                EditorApplication.QueuePlayerLoopUpdate();
+            }
+#endif
+        }
+    }
+
+#if !UNITY_2021_2_OR_NEWER
+    [AttributeUsage(AttributeTargets.Class)]
+    [Conditional("UNITY_EDITOR")]
+    internal class IconAttribute : Attribute
+    {
+        private readonly string _path;
+
+        public IconAttribute(string path)
+        {
+            _path = path;
+        }
+
+#if UNITY_EDITOR
+        private static Action<Object, Texture2D> s_SetIconForObject = typeof(EditorGUIUtility)
+            .GetMethod("SetIconForObject", BindingFlags.Static | BindingFlags.NonPublic)
+            .CreateDelegate(typeof(Action<Object, Texture2D>), null) as Action<Object, Texture2D>;
+
+        [InitializeOnLoadMethod]
+        private static void InitializeOnLoadMethod()
+        {
+            if (Misc.isBatchOrBuilding) return;
+
+            var types = TypeCache.GetTypesWithAttribute(typeof(IconAttribute));
+            var scripts = MonoImporter.GetAllRuntimeMonoScripts();
+            foreach (var type in types)
+            {
+                var script = scripts.FirstOrDefault(x => x.GetClass() == type);
+                if (script == null) continue;
+
+                var path = type.GetCustomAttribute<IconAttribute>()?._path;
+                var icon = AssetDatabase.LoadAssetAtPath<Texture2D>(path);
+                if (icon == null) continue;
+
+                s_SetIconForObject(script, icon);
+            }
+        }
+#endif
+    }
+#endif
+}

Runtime/Internal/Utilities/Misc.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 182319ecc315e4858b119764af0fbcb0
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Internal/Utilities/ObjectPool.cs

@@ -0,0 +1,154 @@
+using System;
+using System.Collections.Generic;
+
+namespace Coffee.UIParticleInternal
+{
+    /// <summary>
+    /// Object pool.
+    /// </summary>
+    internal class InternalObjectPool<T> where T : class
+    {
+#if UNITY_2021_1_OR_NEWER
+        private readonly Predicate<T> _onValid; // Delegate for checking if instances are valid
+        private readonly UnityEngine.Pool.ObjectPool<T> _pool;
+
+        public InternalObjectPool(Func<T> onCreate, Predicate<T> onValid, Action<T> onReturn)
+        {
+            _pool = new UnityEngine.Pool.ObjectPool<T>(onCreate, null, onReturn);
+            _onValid = onValid;
+        }
+
+        /// <summary>
+        /// Rent an instance from the pool.
+        /// When you no longer need it, return it with <see cref="Return" />.
+        /// </summary>
+        public T Rent()
+        {
+            while (0 < _pool.CountInactive)
+            {
+                var instance = _pool.Get();
+                if (_onValid(instance))
+                {
+                    return instance;
+                }
+            }
+
+            // If there are no instances in the pool, create a new one.
+            Logger.Log(this, $"A new instance is created (pooled: {_pool.CountInactive}, created: {_pool.CountAll}).");
+            return _pool.Get();
+        }
+
+        /// <summary>
+        /// Return an instance to the pool and assign null.
+        /// Be sure to return the instance obtained with <see cref="Rent" /> with this method.
+        /// </summary>
+        public void Return(ref T instance)
+        {
+            if (instance == null) return; // Ignore if already pooled or null.
+
+            _pool.Release(instance);
+            Logger.Log(this, $"An instance is released (pooled: {_pool.CountInactive}, created: {_pool.CountAll}).");
+            instance = default; // Set the reference to null.
+        }
+#else
+        private readonly Func<T> _onCreate; // Delegate for creating instances
+        private readonly Action<T> _onReturn; // Delegate for returning instances to the pool
+        private readonly Predicate<T> _onValid; // Delegate for checking if instances are valid
+        private readonly Stack<T> _pool = new Stack<T>(32); // Object pool
+        private int _count; // Total count of created instances
+
+        public InternalObjectPool(Func<T> onCreate, Predicate<T> onValid, Action<T> onReturn)
+        {
+            _onCreate = onCreate;
+            _onValid = onValid;
+            _onReturn = onReturn;
+        }
+
+        /// <summary>
+        /// Rent an instance from the pool.
+        /// When you no longer need it, return it with <see cref="Return" />.
+        /// </summary>
+        public T Rent()
+        {
+            while (0 < _pool.Count)
+            {
+                var instance = _pool.Pop();
+                if (_onValid(instance))
+                {
+                    return instance;
+                }
+            }
+
+            // If there are no instances in the pool, create a new one.
+            Logger.Log(this, $"A new instance is created (pooled: {_pool.Count}, created: {++_count}).");
+            return _onCreate();
+        }
+
+        /// <summary>
+        /// Return an instance to the pool and assign null.
+        /// Be sure to return the instance obtained with <see cref="Rent" /> with this method.
+        /// </summary>
+        public void Return(ref T instance)
+        {
+            if (instance == null || _pool.Contains(instance)) return; // Ignore if already pooled or null.
+
+            _onReturn(instance); // Return the instance to the pool.
+            _pool.Push(instance);
+            Logger.Log(this, $"An instance is released (pooled: {_pool.Count}, created: {_count}).");
+            instance = default; // Set the reference to null.
+        }
+#endif
+    }
+
+    /// <summary>
+    /// Object pool for <see cref="List{T}" />.
+    /// </summary>
+    internal static class InternalListPool<T>
+    {
+#if UNITY_2021_1_OR_NEWER
+        /// <summary>
+        /// Rent an instance from the pool.
+        /// When you no longer need it, return it with <see cref="Return" />.
+        /// </summary>
+        public static List<T> Rent()
+        {
+            return UnityEngine.Pool.ListPool<T>.Get();
+        }
+
+        /// <summary>
+        /// Return an instance to the pool and assign null.
+        /// Be sure to return the instance obtained with <see cref="Rent" /> with this method.
+        /// </summary>
+        public static void Return(ref List<T> toRelease)
+        {
+            if (toRelease != null)
+            {
+                UnityEngine.Pool.ListPool<T>.Release(toRelease);
+            }
+
+            toRelease = null;
+        }
+#else
+        private static readonly InternalObjectPool<List<T>> s_ListPool =
+            new InternalObjectPool<List<T>>(() => new List<T>(), _ => true, x => x.Clear());
+
+        /// <summary>
+        /// Rent an instance from the pool.
+        /// When you no longer need it, return it with <see cref="Return" />.
+        /// </summary>
+        public static List<T> Rent()
+        {
+            return s_ListPool.Rent();
+        }
+
+        /// <summary>
+        /// Return an instance to the pool and assign null.
+        /// Be sure to return the instance obtained with <see cref="Rent" /> with this method.
+        /// </summary>
+        public static void Return(ref List<T> toRelease)
+        {
+            s_ListPool.Return(ref toRelease);
+        }
+#endif
+    }
+}

Runtime/Internal/Utilities/ObjectPool.cs.meta

@@ -0,0 +1,11 @@
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+guid: 632cb1ba34e6a4e80b55a32bb63ca369
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Internal/Utilities/ObjectRepository.cs

@@ -0,0 +1,209 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Profiling;
+using Object = UnityEngine.Object;
+
+namespace Coffee.UIParticleInternal
+{
+    internal class ObjectRepository<T> where T : Object
+    {
+        private readonly Dictionary<Hash128, Entry> _cache = new Dictionary<Hash128, Entry>(8);
+        private readonly Dictionary<int, Hash128> _objectKey = new Dictionary<int, Hash128>(8);
+        private readonly string _name;
+        private readonly Action<T> _onRelease;
+        private readonly Stack<Entry> _pool = new Stack<Entry>(8);
+
+        public ObjectRepository(Action<T> onRelease = null)
+        {
+            _name = $"{typeof(T).Name}Repository";
+            if (onRelease == null)
+            {
+                _onRelease = x =>
+                {
+#if UNITY_EDITOR
+                    if (!Application.isPlaying)
+                    {
+                        Object.DestroyImmediate(x, false);
+                    }
+                    else
+#endif
+                    {
+                        Object.Destroy(x);
+                    }
+                };
+            }
+            else
+            {
+                _onRelease = onRelease;
+            }
+
+            for (var i = 0; i < 8; i++)
+            {
+                _pool.Push(new Entry());
+            }
+        }
+
+        public int count => _cache.Count;
+
+        public void Clear()
+        {
+            foreach (var kv in _cache)
+            {
+                var entry = kv.Value;
+                if (entry == null) continue;
+
+                entry.Release(_onRelease);
+                _pool.Push(entry);
+            }
+
+            _cache.Clear();
+            _objectKey.Clear();
+        }
+
+        public bool Valid(Hash128 hash, T obj)
+        {
+            return _cache.TryGetValue(hash, out var entry) && entry.storedObject == obj;
+        }
+
+        /// <summary>
+        /// Adds or retrieves a cached object based on the hash.
+        /// </summary>
+        public void Get(Hash128 hash, ref T obj, Func<T> onCreate)
+        {
+            if (GetFromCache(hash, ref obj)) return;
+            Add(hash, ref obj, onCreate());
+        }
+
+        /// <summary>
+        /// Adds or retrieves a cached object based on the hash.
+        /// </summary>
+        public void Get<TS>(Hash128 hash, ref T obj, Func<TS, T> onCreate, TS source)
+        {
+            if (GetFromCache(hash, ref obj)) return;
+            Add(hash, ref obj, onCreate(source));
+        }
+
+        private bool GetFromCache(Hash128 hash, ref T obj)
+        {
+            // Find existing entry.
+            Profiler.BeginSample("(COF)[ObjectRepository] GetFromCache");
+            if (_cache.TryGetValue(hash, out var entry))
+            {
+                if (entry.storedObject == null)
+                {
+                    Release(ref entry.storedObject);
+                    Profiler.EndSample();
+                    return false;
+                }
+
+                if (entry.storedObject != obj)
+                {
+                    // if the object is different, release the old one.
+                    Release(ref obj);
+                    ++entry.reference;
+                    obj = entry.storedObject;
+                    Logger.Log(_name, $"Get(total#{count}): {entry}");
+                }
+
+                Profiler.EndSample();
+                return true;
+            }
+
+            Profiler.EndSample();
+            return false;
+        }
+
+        private void Add(Hash128 hash, ref T obj, T newObject)
+        {
+            if (newObject == null)
+            {
+                Release(ref obj);
+                obj = newObject;
+                return;
+            }
+
+            // Create and add a new entry.
+            Profiler.BeginSample("(COF)[ObjectRepository] Add");
+            var newEntry = 0 < _pool.Count ? _pool.Pop() : new Entry();
+            newEntry.storedObject = newObject;
+            newEntry.hash = hash;
+            newEntry.reference = 1;
+            _cache[hash] = newEntry;
+            _objectKey[newObject.GetHashCode()] = hash;
+            Logger.Log(_name, $"<color=#03c700>Add</color>(total#{count}): {newEntry}");
+            Release(ref obj);
+            obj = newObject;
+            Profiler.EndSample();
+        }
+
+        /// <summary>
+        /// Release a object.
+        /// </summary>
+        public void Release(ref T obj)
+        {
+            if (ReferenceEquals(obj, null)) return;
+
+            // Find and release the entry.
+            Profiler.BeginSample("(COF)[ObjectRepository] Release");
+            var id = obj.GetHashCode();
+            if (_objectKey.TryGetValue(id, out var hash)
+                && _cache.TryGetValue(hash, out var entry))
+            {
+                entry.reference--;
+                if (entry.reference <= 0 || entry.storedObject == null)
+                {
+                    Remove(entry);
+                }
+                else
+                {
+                    Logger.Log(_name, $"Release(total#{_cache.Count}): {entry}");
+                }
+            }
+            else
+            {
+                Logger.Log(_name, $"Release(total#{_cache.Count}): <color=red>Already released: {obj}</color>");
+            }
+
+            obj = null;
+            Profiler.EndSample();
+        }
+
+        private void Remove(Entry entry)
+        {
+            if (ReferenceEquals(entry, null)) return;
+
+            Profiler.BeginSample("(COF)[ObjectRepository] Remove");
+            _cache.Remove(entry.hash);
+            _objectKey.Remove(entry.storedObject.GetHashCode());
+            _pool.Push(entry);
+            entry.reference = 0;
+            Logger.Log(_name, $"<color=#f29e03>Remove</color>(total#{_cache.Count}): {entry}");
+            entry.Release(_onRelease);
+            Profiler.EndSample();
+        }
+
+        private class Entry
+        {
+            public Hash128 hash;
+            public int reference;
+            public T storedObject;
+
+            public void Release(Action<T> onRelease)
+            {
+                reference = 0;
+                if (storedObject != null)
+                {
+                    onRelease?.Invoke(storedObject);
+                }
+
+                storedObject = null;
+            }
+
+            public override string ToString()
+            {
+                return $"h{(uint)hash.GetHashCode()} (refs#{reference}), {storedObject}";
+            }
+        }
+    }
+}

Runtime/Internal/Utilities/ObjectRepository.cs.meta

@@ -0,0 +1,11 @@
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+guid: a713d67bdb31e45e296e5f18460717e2
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Internal/Utilities/TypeCache.cs

@@ -0,0 +1,88 @@
+#if !UNITY_2019_2_OR_NEWER
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+
+namespace Coffee.UIParticleInternal
+{
+    public static class TypeCache
+    {
+        private static readonly object s_Lock = new object();
+        private static readonly Dictionary<Type, Type[]> s_DerivedTypesCache = new Dictionary<Type, Type[]>();
+        private static readonly Dictionary<Type, Type[]> s_AttributeTypesCache = new Dictionary<Type, Type[]>();
+
+        public static IEnumerable<Type> GetTypesDerivedFrom(Type baseType)
+        {
+            lock (s_Lock)
+            {
+                if (s_DerivedTypesCache.TryGetValue(baseType, out var cached))
+                {
+                    return cached;
+                }
+
+                var types = new List<Type>();
+                foreach (var t in GetAllLoadableTypes())
+                {
+                    if (t != baseType && baseType.IsAssignableFrom(t))
+                    {
+                        types.Add(t);
+                    }
+                }
+
+                return s_DerivedTypesCache[baseType] = types.ToArray();
+            }
+        }
+
+        public static IEnumerable<Type> GetTypesWithAttribute(Type attr)
+        {
+            lock (s_Lock)
+            {
+                if (s_AttributeTypesCache.TryGetValue(attr, out var cached))
+                {
+                    return cached;
+                }
+
+                var types = new List<Type>();
+                foreach (var t in GetAllLoadableTypes())
+                {
+                    if (t.GetCustomAttributes(attr, inherit: true).Length > 0)
+                    {
+                        types.Add(t);
+                    }
+                }
+
+                return s_AttributeTypesCache[attr] = types.ToArray();
+            }
+        }
+
+        private static IEnumerable<Type> GetAllLoadableTypes()
+        {
+            foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
+            {
+                Type[] types;
+                try
+                {
+                    types = assembly.GetTypes();
+                }
+                catch (ReflectionTypeLoadException ex)
+                {
+                    types = ex.Types;
+                }
+
+                if (types == null)
+                {
+                    continue;
+                }
+
+                foreach (var t in types)
+                {
+                    if (t != null)
+                    {
+                        yield return t;
+                    }
+                }
+            }
+        }
+    }
+}
+#endif

Runtime/Internal/Utilities/TypeCache.cs.meta

@@ -0,0 +1,11 @@
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+guid: bc1207b657ed74ec19e459664d06925f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Internal/Utilities/UIExtraCallbacks.cs

@@ -0,0 +1,128 @@
+using System;
+using System.Reflection;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Coffee.UIParticleInternal
+{
+    /// <summary>
+    /// Provides additional callbacks related to canvas and UI system.
+    /// </summary>
+    internal static class UIExtraCallbacks
+    {
+        private static bool s_IsInitializedAfterCanvasRebuild;
+        private static readonly FastAction s_AfterCanvasRebuildAction = new FastAction();
+        private static readonly FastAction s_LateAfterCanvasRebuildAction = new FastAction();
+        private static readonly FastAction s_BeforeCanvasRebuildAction = new FastAction();
+        private static readonly FastAction s_OnScreenSizeChangedAction = new FastAction();
+        private static Vector2Int s_LastScreenSize;
+
+        static UIExtraCallbacks()
+        {
+            Canvas.willRenderCanvases += OnBeforeCanvasRebuild;
+            Logger.LogMulticast(typeof(Canvas), "willRenderCanvases", message: "ctor");
+        }
+
+        /// <summary>
+        /// Event that occurs after canvas rebuilds.
+        /// </summary>
+        public static event Action onLateAfterCanvasRebuild
+        {
+            add => s_LateAfterCanvasRebuildAction.Add(value);
+            remove => s_LateAfterCanvasRebuildAction.Remove(value);
+        }
+
+        /// <summary>
+        /// Event that occurs before canvas rebuilds.
+        /// </summary>
+        public static event Action onBeforeCanvasRebuild
+        {
+            add => s_BeforeCanvasRebuildAction.Add(value);
+            remove => s_BeforeCanvasRebuildAction.Remove(value);
+        }
+
+        /// <summary>
+        /// Event that occurs after canvas rebuilds.
+        /// </summary>
+        public static event Action onAfterCanvasRebuild
+        {
+            add => s_AfterCanvasRebuildAction.Add(value);
+            remove => s_AfterCanvasRebuildAction.Remove(value);
+        }
+
+        /// <summary>
+        /// Event that occurs when the screen size changes.
+        /// </summary>
+        public static event Action onScreenSizeChanged
+        {
+            add => s_OnScreenSizeChangedAction.Add(value);
+            remove => s_OnScreenSizeChangedAction.Remove(value);
+        }
+
+        /// <summary>
+        /// Initializes the UIExtraCallbacks to ensure proper event handling.
+        /// </summary>
+        private static void InitializeAfterCanvasRebuild()
+        {
+            if (s_IsInitializedAfterCanvasRebuild) return;
+            s_IsInitializedAfterCanvasRebuild = true;
+
+            // Explicitly set `Canvas.willRenderCanvases += CanvasUpdateRegistry.PerformUpdate`.
+            CanvasUpdateRegistry.IsRebuildingLayout();
+#if TMP_ENABLE
+            // Explicitly set `Canvas.willRenderCanvases += TMP_UpdateManager.DoRebuilds`.
+            typeof(TMPro.TMP_UpdateManager)
+                .GetProperty("instance", BindingFlags.NonPublic | BindingFlags.Static)
+                .GetValue(null);
+#endif
+            Canvas.willRenderCanvases -= OnAfterCanvasRebuild;
+            Canvas.willRenderCanvases += OnAfterCanvasRebuild;
+            Logger.LogMulticast(typeof(Canvas), "willRenderCanvases",
+                message: "InitializeAfterCanvasRebuild");
+        }
+
+#if UNITY_EDITOR && UNITY_2019_3_OR_NEWER
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+#elif UNITY_EDITOR
+        [InitializeOnLoadMethod]
+#else
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
+#endif
+        private static void InitializeOnLoad()
+        {
+            Canvas.willRenderCanvases -= OnAfterCanvasRebuild;
+            s_IsInitializedAfterCanvasRebuild = false;
+            s_LastScreenSize = default;
+        }
+
+        /// <summary>
+        /// Callback method called before canvas rebuilds.
+        /// </summary>
+        private static void OnBeforeCanvasRebuild()
+        {
+            var screenSize = new Vector2Int(Screen.width, Screen.height);
+            if (s_LastScreenSize != screenSize)
+            {
+                if (s_LastScreenSize != default)
+                {
+                    s_OnScreenSizeChangedAction.Invoke();
+                }
+
+                s_LastScreenSize = screenSize;
+            }
+
+            s_BeforeCanvasRebuildAction.Invoke();
+            InitializeAfterCanvasRebuild();
+        }
+
+        /// <summary>
+        /// Callback method called after canvas rebuilds.
+        /// </summary>
+        private static void OnAfterCanvasRebuild()
+        {
+            s_AfterCanvasRebuildAction.Invoke();
+            s_LateAfterCanvasRebuildAction.Invoke();
+        }
+    }
+}

Runtime/Internal/Utilities/UIExtraCallbacks.cs.meta

@@ -0,0 +1,11 @@
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+guid: 9ea318e6e3e6c46aa97c72e28230bdc9
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/ModifiedMaterial.cs

@@ -1,72 +0,0 @@
-using System.Collections.Generic;
-using UnityEngine;
-
-namespace Coffee.UIParticleExtensions
-{
-    internal class ModifiedMaterial
-    {
-        private static readonly List<MatEntry> s_Entries = new List<MatEntry>();
-
-        public static Material Add(Material baseMat, Texture texture, int id, int props)
-        {
-            MatEntry e;
-            for (var i = 0; i < s_Entries.Count; i++)
-            {
-                e = s_Entries[i];
-                if (e.baseMat != baseMat || e.texture != texture || e.id != id || e.props != props) continue;
-                ++e.count;
-                return e.customMat;
-            }
-
-            e = new MatEntry
-            {
-                count = 1,
-                baseMat = baseMat,
-                texture = texture,
-                id = id,
-                props = props,
-                customMat = new Material(baseMat)
-                {
-                    name = $"{baseMat.name}_{id}",
-                    hideFlags = HideFlags.DontSave | HideFlags.NotEditable,
-                    mainTexture = texture ? texture : baseMat.mainTexture
-                }
-            };
-            s_Entries.Add(e);
-            //Debug.LogFormat(">>>> ModifiedMaterial.Add -> count = count:{0}, mat:{1}, tex:{2}, id:{3}", s_Entries.Count, baseMat, texture, id);
-            return e.customMat;
-        }
-
-        public static void Remove(Material customMat)
-        {
-            if (!customMat) return;
-
-            for (var i = 0; i < s_Entries.Count; ++i)
-            {
-                var e = s_Entries[i];
-                if (e.customMat != customMat) continue;
-                if (--e.count == 0)
-                {
-                    //Debug.LogFormat(">>>> ModifiedMaterial.Remove -> count:{0}, mat:{1}, tex:{2}, id:{3}", s_Entries.Count - 1, e.customMat, e.texture, e.id);
-                    Misc.DestroyImmediate(e.customMat);
-                    e.customMat = null;
-                    e.baseMat = null;
-                    e.texture = null;
-                    s_Entries.RemoveAt(i);
-                }
-
-                break;
-            }
-        }
-
-        private class MatEntry
-        {
-            public Material baseMat;
-            public int count;
-            public Material customMat;
-            public int id;
-            public int props;
-            public Texture texture;
-        }
-    }
-}

Runtime/ParticleSystemPreviewer.cs

@@ -0,0 +1,237 @@
+using System.Collections.Generic;
+using System.Linq;
+using Coffee.UIParticleInternal;
+using UnityEditor;
+using UnityEngine;
+
+namespace Coffee.UIExtensions
+{
+    [Icon("Packages/com.coffee.ui-particle/Editor/UIParticleIcon.png")]
+    [ExecuteAlways]
+    internal class ParticleSystemPreviewer : MonoBehaviour
+    {
+        // Do nothing.
+    }
+
+#if UNITY_EDITOR
+    [CustomEditor(typeof(ParticleSystemPreviewer))]
+    [CanEditMultipleObjects]
+    internal class ParticleSystemPreviewerEditor : Editor
+    {
+        private GameObject[] _gameObjects;
+
+        private void OnEnable()
+        {
+            _gameObjects = targets.OfType<ParticleSystemPreviewer>().Select(x => x.gameObject).ToArray();
+            ParticleSystemPreviewSystem.Register(_gameObjects);
+        }
+
+        public override void OnInspectorGUI()
+        {
+            base.OnInspectorGUI();
+            ParticleSystemPreviewSystem.DrawWarningForTemporary(_gameObjects);
+            ParticleSystemPreviewSystem.DrawWarningForPermanent(_gameObjects);
+        }
+    }
+
+    /// <summary>
+    /// This class manages temporary ParticleSystems for preview purposes.
+    /// When previewing in the editor, it is common to place an empty ParticleSystem as the root, but it consumes memory at runtime if included in the build.
+    /// The temporary ParticleSystems created by this class only exist when the specified GameObject is selected, and are automatically deleted when the selection is cleared.
+    /// </summary>
+    internal class ParticleSystemPreviewSystem : ScriptableSingleton<ParticleSystemPreviewSystem>
+    {
+        private const HideFlags k_TemporaryHideFlags = HideFlags.DontSave | HideFlags.NotEditable;
+
+        [SerializeField]
+        private List<GameObject> m_PreviewObjects = new List<GameObject>();
+
+#if UNITY_2019_3_OR_NEWER
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+#endif
+        [InitializeOnLoadMethod]
+        public static void Initialize()
+        {
+            instance.OnSelectionChanged();
+
+            Selection.selectionChanged -= instance.OnSelectionChanged;
+            Selection.selectionChanged += instance.OnSelectionChanged;
+        }
+
+        /// <summary>
+        /// Adds a temporary ParticleSystem to the specified GameObject for preview purposes.
+        /// </summary>
+        public static void Register(GameObject[] targets)
+        {
+            foreach (var target in targets)
+            {
+                Register(target);
+            }
+        }
+
+        /// <summary>
+        /// Adds a temporary ParticleSystem to the specified GameObject for preview purposes.
+        /// </summary>
+        public static void Register(GameObject target)
+        {
+            if (!target) return;
+            if (EditorApplication.isPlaying) return;
+            if (instance.m_PreviewObjects.Contains(target)) return;
+            if (target.TryGetComponent<ParticleSystem>(out var ps))
+            {
+                if (ps.hideFlags == k_TemporaryHideFlags)
+                {
+                    RegisterParticleSystem(ps);
+                }
+
+                return;
+            }
+
+            // Create temporary ParticleSystem for preview.
+            RegisterParticleSystem(target.AddComponent<ParticleSystem>());
+        }
+
+        /// <summary>
+        /// Removes the temporary ParticleSystem associated with the specified GameObject.
+        /// </summary>
+        /// <param name="target"></param>
+        public static void Unregister(GameObject target)
+        {
+            if (!target) return;
+
+            var index = instance.m_PreviewObjects.IndexOf(target);
+            if (index < 0) return;
+
+            instance.m_PreviewObjects.RemoveAt(index);
+            if (HasTemporaryParticleSystem(target))
+            {
+                RemoveParticleSystem(target);
+            }
+        }
+
+        private static void RegisterParticleSystem(ParticleSystem ps)
+        {
+            if (!ps) return;
+            if (EditorApplication.isPlaying) return;
+
+            ps.hideFlags = k_TemporaryHideFlags;
+
+            var emission = ps.emission;
+            emission.enabled = false;
+            var shape = ps.shape;
+            shape.enabled = false;
+
+            if (ps.TryGetComponent<ParticleSystemRenderer>(out var psr))
+            {
+                psr.enabled = false;
+                psr.hideFlags = k_TemporaryHideFlags;
+            }
+
+            instance.m_PreviewObjects.Add(ps.gameObject);
+            EditorUtility.SetDirty(ps.gameObject);
+        }
+
+        /// <summary>
+        /// Removes the temporary ParticleSystem associated with the specified GameObject.
+        /// </summary>
+        /// <param name="target"></param>
+        private static void RemoveParticleSystem(GameObject target)
+        {
+            if (target.TryGetComponent<ParticleSystem>(out var ps))
+            {
+                Misc.DestroyImmediate(ps);
+                EditorUtility.SetDirty(target);
+            }
+
+            if (target.TryGetComponent<ParticleSystem>(out var psr))
+            {
+                Misc.DestroyImmediate(psr);
+                EditorUtility.SetDirty(target);
+            }
+        }
+
+        /// <summary>
+        /// Checks if the specified GameObject has a temporary ParticleSystem.
+        /// </summary>
+        private static bool HasTemporaryParticleSystem(GameObject target)
+        {
+            return target
+                   && instance.m_PreviewObjects.Contains(target)
+                   && target.TryGetComponent<ParticleSystem>(out var ps)
+                   && ps.hideFlags == k_TemporaryHideFlags;
+        }
+
+        /// <summary>
+        /// Checks if the specified GameObject has a permanent ParticleSystem.
+        /// </summary>
+        private static bool HasPermanentParticleSystem(GameObject target)
+        {
+            return target
+                   && target.TryGetComponent<ParticleSystem>(out var ps)
+                   && ps.hideFlags != k_TemporaryHideFlags;
+        }
+
+        private void OnSelectionChanged()
+        {
+            var selectedGameObjects = Selection.gameObjects;
+            for (var i = m_PreviewObjects.Count - 1; 0 <= i; i--)
+            {
+                var go = m_PreviewObjects[i];
+                if (!go)
+                {
+                    m_PreviewObjects.RemoveAt(i);
+                }
+                else if (EditorApplication.isPlaying && !selectedGameObjects.Contains(go))
+                {
+                    Unregister(go);
+                }
+            }
+        }
+
+        public static void DrawWarningForTemporary(GameObject[] gameObjects)
+        {
+            if (gameObjects == null || gameObjects.Length == 0 || !gameObjects.Any(HasTemporaryParticleSystem)) return;
+
+            if (WarningButton("The temporary ParticleSystem for preview is attached.\n" +
+                              "It will be removed when exiting edit mode.", "Remove"))
+            {
+                foreach (var go in gameObjects)
+                {
+                    if (HasTemporaryParticleSystem(go))
+                    {
+                        RemoveParticleSystem(go);
+                    }
+                }
+            }
+        }
+
+        public static void DrawWarningForPermanent(GameObject[] gameObjects)
+        {
+            if (gameObjects == null || gameObjects.Length == 0 || !gameObjects.Any(HasPermanentParticleSystem)) return;
+
+            if (WarningButton("The permanent ParticleSystem is attached.\n" +
+                              "It will be included in build.", "Remove"))
+            {
+                foreach (var go in gameObjects)
+                {
+                    if (HasPermanentParticleSystem(go))
+                    {
+                        RemoveParticleSystem(go);
+                        Unregister(go);
+                        Register(go);
+                    }
+                }
+            }
+        }
+
+        private static bool WarningButton(string message, string buttonText)
+        {
+            EditorGUILayout.BeginHorizontal();
+            EditorGUILayout.HelpBox(message, MessageType.Warning, true);
+            var clicked = GUILayout.Button(EditorGUIUtility.TrTempContent(buttonText));
+            EditorGUILayout.EndHorizontal();
+            return clicked;
+        }
+    }
+#endif
+}

Runtime/ParticleSystemPreviewer.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: b171deb49fb7b471291108ad7e1c9baa
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/UIParticle.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Runtime.CompilerServices;
-using Coffee.UIParticleExtensions;
+using Coffee.UIParticleInternal;
 using UnityEngine;
 using UnityEngine.Rendering;
 using UnityEngine.Serialization;
@@ -9,12 +9,16 @@ using UnityEngine.UI;
 using Random = UnityEngine.Random;
 
 [assembly: InternalsVisibleTo("Coffee.UIParticle.Editor")]
+[assembly: InternalsVisibleTo("Coffee.UIParticle.Editor.Tests")]
+[assembly: InternalsVisibleTo("Coffee.UIParticle.PerformanceDemo")]
+[assembly: InternalsVisibleTo("Coffee.UIParticle.Demo")]
 
 namespace Coffee.UIExtensions
 {
     /// <summary>
     /// Render maskable and sortable particle effect ,without Camera, RenderTexture or Canvas.
     /// </summary>
+    [Icon("Packages/com.coffee.ui-particle/Editor/UIParticleIcon.png")]
     [ExecuteAlways]
     [RequireComponent(typeof(RectTransform))]
     [RequireComponent(typeof(CanvasRenderer))]
@@ -117,9 +121,12 @@ namespace Coffee.UIExtensions
                  "Change the bake view size.")]
         private float m_CustomViewSize = 10;
 
+        [SerializeField]
+        [Tooltip("Time scale multiplier.")]
+        private float m_TimeScaleMultiplier = 1;
+
         private readonly List<UIParticleRenderer> _renderers = new List<UIParticleRenderer>();
         private Camera _bakeCamera;
-        private Canvas _canvas;
         private int _groupId;
         private bool _isScaleStored;
         private Vector3 _storedScale;
@@ -256,6 +263,22 @@ namespace Coffee.UIExtensions
             set => m_CustomViewSize = Mathf.Max(0.1f, value);
         }
 
+        /// <summary>
+        /// View size for Baking.
+        /// </summary>
+        public float viewSizeForBaking => useCustomView
+            ? m_CustomViewSize
+            : UIParticleProjectSettings.defaultViewSizeForBaking;
+
+        /// <summary>
+        /// Time scale multiplier.
+        /// </summary>
+        public float timeScaleMultiplier
+        {
+            get => m_TimeScaleMultiplier;
+            set => m_TimeScaleMultiplier = value;
+        }
+
         internal bool useMeshSharing => m_MeshSharing != MeshSharing.None;
 
         internal bool isPrimary =>
@@ -342,6 +365,7 @@ namespace Coffee.UIExtensions
 
             _isScaleStored = false;
             UIParticleUpdater.Unregister(this);
+            _renderers.RemoveAll(r => r == null);
             _renderers.ForEach(r => r.Reset());
             UnregisterDirtyMaterialCallback(UpdateRendererMaterial);
 
@@ -455,7 +479,7 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < _renderers.Count; i++)
             {
                 var r = _renderers[i];
-                if (!r || !r.material) continue;
+                if (r == null || r.material == null) continue;
                 result.Add(r.material);
             }
         }
@@ -473,7 +497,7 @@ namespace Coffee.UIExtensions
         /// </summary>
         public void SetParticleSystemInstance(GameObject instance, bool destroyOldParticles)
         {
-            if (!instance) return;
+            if (instance == null) return;
 
             var childCount = transform.childCount;
             for (var i = 0; i < childCount; i++)
@@ -502,7 +526,7 @@ namespace Coffee.UIExtensions
         /// </summary>
         public void SetParticleSystemPrefab(GameObject prefab)
         {
-            if (!prefab) return;
+            if (prefab == null) return;
 
             SetParticleSystemInstance(Instantiate(prefab.gameObject), true);
         }
@@ -522,12 +546,17 @@ namespace Coffee.UIExtensions
         /// </summary>
         private void RefreshParticles(GameObject root)
         {
-            if (!root) return;
+            if (root == null) return;
             root.GetComponentsInChildren(true, particles);
             for (var i = particles.Count - 1; 0 <= i; i--)
             {
                 var ps = particles[i];
-                if (!ps || ps.GetComponentInParent<UIParticle>(true) != this)
+                if (!ps
+#if UNITY_EDITOR
+                    || (ps.hideFlags & HideFlags.DontSave) != 0 // Dummy ParticleSystems for preview.
+                    || ps.gameObject.CompareTag("EditorOnly") // Ignore "EditorOnly" tagged ParticleSystems.
+#endif
+                    || ps.GetComponentInParent<UIParticle>(true) != this) // Ignore ParticleSystems that are not under this UIParticle.
                 {
                     particles.RemoveAt(i);
                 }
@@ -575,13 +604,15 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < particleSystems.Count; i++)
             {
                 var ps = particleSystems[i];
-                if (!ps) continue;
+                if (ps == null) continue;
-                GetRenderer(j++).Set(this, ps, false);
+
+                var mainEmitter = ps.GetMainEmitter(particleSystems);
+                GetRenderer(j++).Set(this, ps, false, mainEmitter);
 
                 // If the trail is enabled, set it additionally.
                 if (ps.trails.enabled)
                 {
-                    GetRenderer(j++).Set(this, ps, true);
+                    GetRenderer(j++).Set(this, ps, true, mainEmitter);
                 }
             }
         }
@@ -624,7 +655,7 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < _renderers.Count; i++)
             {
                 var r = _renderers[i];
-                if (r) continue;
+                if (r != null) continue;
 
                 RefreshParticles(particles);
                 break;
@@ -634,7 +665,7 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < _renderers.Count; i++)
             {
                 var r = _renderers[i];
-                if (!r) continue;
+                if (r == null) continue;
 
                 r.UpdateMesh(bakeCamera);
             }
@@ -663,7 +694,7 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < _renderers.Count; i++)
             {
                 var r = _renderers[i];
-                if (!r) continue;
+                if (r == null) continue;
                 r.maskable = maskable;
                 r.SetMaterialDirty();
             }
@@ -676,7 +707,7 @@ namespace Coffee.UIExtensions
                 _renderers.Add(UIParticleRenderer.AddRenderer(this, index));
             }
 
-            if (!_renderers[index])
+            if (_renderers[index] == null)
             {
                 _renderers[index] = UIParticleRenderer.AddRenderer(this, index);
             }
@@ -686,15 +717,15 @@ namespace Coffee.UIExtensions
 
         private Camera GetBakeCamera()
         {
-            if (!canvas) return Camera.main;
+            if (canvas == null) return Camera.main;
             if (!useCustomView && canvas.renderMode != RenderMode.ScreenSpaceOverlay && canvas.rootCanvas.worldCamera)
             {
                 return canvas.rootCanvas.worldCamera;
             }
 
-            if (_bakeCamera)
+            if (_bakeCamera != null)
             {
-                _bakeCamera.orthographicSize = useCustomView ? customViewSize : 10;
+                _bakeCamera.orthographicSize = viewSizeForBaking;
                 return _bakeCamera;
             }
 
@@ -711,7 +742,7 @@ namespace Coffee.UIExtensions
             }
 
             // Create baking camera.
-            if (!_bakeCamera)
+            if (_bakeCamera == null)
             {
                 var go = new GameObject("[generated] UIParticle BakingCamera");
                 go.SetActive(false);
@@ -721,7 +752,7 @@ namespace Coffee.UIExtensions
 
             // Setup baking camera.
             _bakeCamera.enabled = false;
-            _bakeCamera.orthographicSize = useCustomView ? customViewSize : 10;
+            _bakeCamera.orthographicSize = viewSizeForBaking;
             _bakeCamera.transform.SetPositionAndRotation(new Vector3(0, 0, -1000), Quaternion.identity);
             _bakeCamera.orthographic = true;
             _bakeCamera.farClipPlane = 2000f;
@@ -733,7 +764,7 @@ namespace Coffee.UIExtensions
             _bakeCamera.useOcclusionCulling = false;
 
             _bakeCamera.gameObject.SetActive(false);
-            _bakeCamera.gameObject.hideFlags = HideFlags.HideAndDontSave;
+            _bakeCamera.gameObject.hideFlags = UIParticleProjectSettings.globalHideFlags;
 
             return _bakeCamera;
         }

Runtime/UIParticle.cs.meta

@@ -5,7 +5,7 @@ MonoImporter:
   serializedVersion: 2
   defaultReferences: []
   executionOrder: 0
-  icon: {fileID: 2800000, guid: 5f0675613942149309588d556e33d990, type: 3}
+  icon: {instanceID: 0}
   userData: 
   assetBundleName: 
   assetBundleVariant: 

Runtime/UIParticleAttractor.cs

@@ -1,6 +1,6 @@
 using System;
 using System.Collections.Generic;
-using Coffee.UIParticleExtensions;
+using Coffee.UIParticleInternal;
 using UnityEngine;
 using UnityEngine.Events;
 
@@ -148,7 +148,7 @@ namespace Coffee.UIExtensions
             // Collect UIParticle if needed (same size as m_ParticleSystems)
             CollectUIParticlesIfNeeded();
 
-            for (var particleIndex = 0; particleIndex < this.m_ParticleSystems.Count; particleIndex++)
+            for (var particleIndex = 0; particleIndex < m_ParticleSystems.Count; particleIndex++)
             {
                 var particleSystem = m_ParticleSystems[particleIndex];
 
@@ -163,21 +163,21 @@ namespace Coffee.UIExtensions
                 particleSystem.GetParticles(particles, count);
 
                 var uiParticle = _uiParticles[particleIndex];
-                var dstPos = this.GetDestinationPosition(uiParticle, particleSystem);
+                var dstPos = GetDestinationPosition(uiParticle, particleSystem);
                 for (var i = 0; i < count; i++)
                 {
                     // Attracted
                     var p = particles[i];
-                    if (0f < p.remainingLifetime && Vector3.Distance(p.position, dstPos) < this.m_DestinationRadius)
+                    if (0f < p.remainingLifetime && Vector3.Distance(p.position, dstPos) < m_DestinationRadius)
                     {
                         p.remainingLifetime = 0f;
                         particles[i] = p;
 
-                        if (this.m_OnAttracted != null)
+                        if (m_OnAttracted != null)
                         {
                             try
                             {
-                                this.m_OnAttracted.Invoke();
+                                m_OnAttracted.Invoke();
                             }
                             catch (Exception e)
                             {
@@ -189,7 +189,7 @@ namespace Coffee.UIExtensions
                     }
 
                     // Calc attracting time
-                    var delayTime = p.startLifetime * this.m_DelayRate;
+                    var delayTime = p.startLifetime * m_DelayRate;
                     var duration = p.startLifetime - delayTime;
                     var time = Mathf.Max(0, p.startLifetime - p.remainingLifetime - delayTime);
 
@@ -197,7 +197,7 @@ namespace Coffee.UIExtensions
                     if (time <= 0) continue;
 
                     // Attract
-                    p.position = this.GetAttractedPosition(p.position, dstPos, duration, time);
+                    p.position = GetAttractedPosition(p.position, dstPos, duration, time);
                     p.velocity *= 0.5f;
                     particles[i] = p;
                 }
@@ -208,7 +208,7 @@ namespace Coffee.UIExtensions
 
         private Vector3 GetDestinationPosition(UIParticle uiParticle, ParticleSystem particleSystem)
         {
-            var isUI = uiParticle && uiParticle.enabled;
+            var isUI = uiParticle != null && uiParticle.enabled;
             var psPos = particleSystem.transform.position;
             var attractorPos = transform.position;
             var dstPos = attractorPos;

Runtime/UIParticleAttractor.cs.meta

@@ -5,7 +5,7 @@ MonoImporter:
   serializedVersion: 2
   defaultReferences: []
   executionOrder: 0
-  icon: {instanceID: 0}
+  icon: {fileID: 2800000, guid: 5f0675613942149309588d556e33d990, type: 3}
   userData: 
   assetBundleName: 
   assetBundleVariant: 

Runtime/UIParticleProjectSettings.cs

@@ -0,0 +1,68 @@
+#pragma warning disable CS0414
+using Coffee.UIParticleInternal;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.Serialization;
+
+namespace Coffee.UIExtensions
+{
+    public class UIParticleProjectSettings : PreloadedProjectSettings<UIParticleProjectSettings>
+    {
+        [Header("Setting")]
+        [SerializeField]
+        [Tooltip("Automatically correct the color space of the mesh.")]
+        [FormerlySerializedAs("m_EnableLinearToGamma")]
+        private bool m_AutoColorCorrection = true;
+
+        public static bool autoColorCorrection
+        {
+            get => instance.m_AutoColorCorrection;
+            set => instance.m_AutoColorCorrection = value;
+        }
+
+        [SerializeField]
+        [Tooltip("Default view size for baking particle systems.")]
+        private float m_DefaultViewSizeForBaking = 10;
+
+        public static float defaultViewSizeForBaking
+        {
+            get => instance.m_DefaultViewSizeForBaking;
+            set => instance.m_DefaultViewSizeForBaking = value;
+        }
+
+        [Header("Editor")]
+        [Tooltip("Hide the automatically generated objects.\n" +
+                 "  - UIParticleRenderer\n" +
+                 "  - UIParticle BakingCamera")]
+        [SerializeField]
+        private bool m_HideGeneratedObjects = true;
+
+        [Tooltip("When selecting UIParticle, a temporary ParticleSystem is generated for preview.")]
+        [SerializeField]
+        private bool m_PreviewOnSelect = true;
+
+        internal static HideFlags globalHideFlags => instance.m_HideGeneratedObjects
+            ? HideFlags.DontSave | HideFlags.NotEditable | HideFlags.HideInHierarchy | HideFlags.HideInInspector
+            : HideFlags.DontSave | HideFlags.NotEditable;
+
+        internal static bool previewOnSelect => instance.m_PreviewOnSelect;
+
+#if UNITY_EDITOR
+        [SettingsProvider]
+        private static SettingsProvider CreateSettingsProvider()
+        {
+            return new PreloadedProjectSettingsProvider("Project/UI/UI Particle");
+        }
+
+        [CustomEditor(typeof(UIParticleProjectSettings))]
+        private class UIParticleProjectSettingsEditor : Editor
+        {
+            public override void OnInspectorGUI()
+            {
+                EditorGUIUtility.labelWidth = 180;
+                base.OnInspectorGUI();
+            }
+        }
+#endif
+    }
+}

Runtime/UIParticleProjectSettings.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: f22a23b9d98e440478697f4adf30e61c
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {fileID: 2800000, guid: 5f0675613942149309588d556e33d990, type: 3}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/UIParticleRenderer.cs

@@ -6,7 +6,7 @@
 #endif
 using System;
 using System.Collections.Generic;
-using Coffee.UIParticleExtensions;
+using Coffee.UIParticleInternal;
 using UnityEditor;
 using UnityEngine;
 using UnityEngine.Profiling;
@@ -15,25 +15,24 @@ using UnityEngine.UI;
 
 namespace Coffee.UIExtensions
 {
+    [Icon("Packages/com.coffee.ui-particle/Editor/UIParticleIcon.png")]
     [ExecuteAlways]
     [RequireComponent(typeof(RectTransform))]
     [RequireComponent(typeof(CanvasRenderer))]
     [AddComponentMenu("")]
     internal class UIParticleRenderer : MaskableGraphic
     {
-        private static readonly List<Component> s_Components = new List<Component>();
         private static readonly CombineInstance[] s_CombineInstances = { new CombineInstance() };
         private static readonly List<Material> s_Materials = new List<Material>(2);
         private static MaterialPropertyBlock s_Mpb;
-        private static readonly List<UIParticleRenderer> s_Renderers = new List<UIParticleRenderer>();
-        private static readonly List<Color32> s_Colors = new List<Color32>();
         private static readonly Vector3[] s_Corners = new Vector3[4];
-        private Material _currentMaterialForRendering;
         private bool _delay;
         private int _index;
         private bool _isPrevStored;
         private bool _isTrail;
+        private bool _meshCleared;
         private Bounds _lastBounds;
+        private Material _materialForRendering;
         private Material _modifiedMaterial;
         private UIParticle _parent;
         private ParticleSystem _particleSystem;
@@ -43,6 +42,7 @@ namespace Coffee.UIExtensions
         private Vector2Int _prevScreenSize;
         private bool _preWarm;
         private ParticleSystemRenderer _renderer;
+        private ParticleSystem _mainEmitter;
 
         public override Texture mainTexture => _isTrail ? null : _particleSystem.GetTextureForSprite();
 
@@ -56,7 +56,7 @@ namespace Coffee.UIExtensions
                 s_Corners[1] = transform.TransformPoint(_lastBounds.min.x, _lastBounds.max.y, 0);
                 s_Corners[2] = transform.TransformPoint(_lastBounds.max.x, _lastBounds.max.y, 0);
                 s_Corners[3] = transform.TransformPoint(_lastBounds.max.x, _lastBounds.min.y, 0);
-                if (canvas)
+                if (canvas != null)
                 {
                     var worldToLocalMatrix = canvas.rootCanvas.transform.worldToLocalMatrix;
                     for (var i = 0; i < 4; ++i)
@@ -92,9 +92,22 @@ namespace Coffee.UIExtensions
             }
         }
 
+        public override Material materialForRendering
+        {
+            get
+            {
+                if (_materialForRendering == null)
+                {
+                    _materialForRendering = base.materialForRendering;
+                }
+
+                return _materialForRendering;
+            }
+        }
+
         public void Reset(int index = -1)
         {
-            if (_renderer)
+            if (_renderer != null)
             {
                 _renderer.enabled = true;
             }
@@ -102,13 +115,14 @@ namespace Coffee.UIExtensions
             _parent = null;
             _particleSystem = null;
             _renderer = null;
+            _mainEmitter = null;
             if (0 <= index)
             {
                 _index = index;
             }
 
             //_emitter = null;
-            if (this && isActiveAndEnabled)
+            if (isActiveAndEnabled)
             {
                 material = null;
                 canvasRenderer.Clear();
@@ -117,9 +131,8 @@ namespace Coffee.UIExtensions
             }
             else
             {
-                ModifiedMaterial.Remove(_modifiedMaterial);
+                MaterialRepository.Release(ref _modifiedMaterial);
-                _modifiedMaterial = null;
+                _materialForRendering = null;
-                _currentMaterialForRendering = null;
             }
         }
 
@@ -127,7 +140,8 @@ namespace Coffee.UIExtensions
         {
             base.OnEnable();
 
-            if (!s_CombineInstances[0].mesh)
+            hideFlags = UIParticleProjectSettings.globalHideFlags;
+            if (s_CombineInstances[0].mesh == null)
             {
                 s_CombineInstances[0].mesh = new Mesh
                 {
@@ -135,17 +149,14 @@ namespace Coffee.UIExtensions
                     hideFlags = HideFlags.HideAndDontSave
                 };
             }
-
-            _currentMaterialForRendering = null;
         }
 
         protected override void OnDisable()
         {
             base.OnDisable();
 
-            ModifiedMaterial.Remove(_modifiedMaterial);
+            MaterialRepository.Release(ref _modifiedMaterial);
-            _modifiedMaterial = null;
+            _materialForRendering = null;
-            _currentMaterialForRendering = null;
             _isPrevStored = false;
         }
 
@@ -154,7 +165,7 @@ namespace Coffee.UIExtensions
             // Create renderer object.
             var go = new GameObject("[generated] UIParticleRenderer", typeof(UIParticleRenderer))
             {
-                hideFlags = HideFlags.HideAndDontSave,
+                hideFlags = UIParticleProjectSettings.globalHideFlags,
                 layer = parent.gameObject.layer
             };
 
@@ -178,12 +189,9 @@ namespace Coffee.UIExtensions
         /// </summary>
         public override Material GetModifiedMaterial(Material baseMaterial)
         {
-            _currentMaterialForRendering = null;
-
             if (!IsActive() || !_parent)
             {
-                ModifiedMaterial.Remove(_modifiedMaterial);
+                MaterialRepository.Release(ref _modifiedMaterial);
-                _modifiedMaterial = null;
                 return baseMaterial;
             }
 
@@ -193,26 +201,33 @@ namespace Coffee.UIExtensions
             var texture = mainTexture;
             if (texture == null && _parent.m_AnimatableProperties.Length == 0)
             {
-                ModifiedMaterial.Remove(_modifiedMaterial);
+                MaterialRepository.Release(ref _modifiedMaterial);
-                _modifiedMaterial = null;
                 return modifiedMaterial;
             }
 
-            //
+            var hash = new Hash128(
-            var id = _parent.m_AnimatableProperties.Length == 0 ? 0 : GetInstanceID();
+                modifiedMaterial ? (uint)modifiedMaterial.GetHashCode() : 0,
+                texture ? (uint)texture.GetHashCode() : 0,
+                0 < _parent.m_AnimatableProperties.Length ? (uint)GetHashCode() : 0,
 #if UNITY_EDITOR
-            var props = EditorJsonUtility.ToJson(modifiedMaterial).GetHashCode();
+                (uint)EditorJsonUtility.ToJson(modifiedMaterial).GetHashCode()
 #else
-            var props = 0;
+                0
 #endif
-            modifiedMaterial = ModifiedMaterial.Add(modifiedMaterial, texture, id, props);
+            );
-            ModifiedMaterial.Remove(_modifiedMaterial);
+            if (!MaterialRepository.Valid(hash, _modifiedMaterial))
-            _modifiedMaterial = modifiedMaterial;
+            {
+                MaterialRepository.Get(hash, ref _modifiedMaterial, x => new Material(x.mat)
+                {
+                    hideFlags = HideFlags.HideAndDontSave,
+                    mainTexture = x.texture ? x.texture : x.mat.mainTexture
+                }, (mat: modifiedMaterial, texture));
+            }
 
-            return modifiedMaterial;
+            return _modifiedMaterial;
         }
 
-        public void Set(UIParticle parent, ParticleSystem ps, bool isTrail)
+        public void Set(UIParticle parent, ParticleSystem ps, bool isTrail, ParticleSystem mainEmitter)
         {
             _parent = parent;
             maskable = parent.maskable;
@@ -235,10 +250,7 @@ namespace Coffee.UIExtensions
 
             ps.TryGetComponent(out _renderer);
             _renderer.enabled = false;
-
-            //_emitter = emitter;
             _isTrail = isTrail;
-
             _renderer.GetSharedMaterials(s_Materials);
             material = s_Materials[isTrail ? 1 : 0];
             s_Materials.Clear();
@@ -255,6 +267,7 @@ namespace Coffee.UIExtensions
             _prevScreenSize = new Vector2Int(Screen.width, Screen.height);
             _prevCanvasScale = canvas ? canvas.scaleFactor : 1f;
             _delay = true;
+            _mainEmitter = mainEmitter;
 
             canvasRenderer.SetTexture(null);
 
@@ -271,28 +284,47 @@ namespace Coffee.UIExtensions
                 || !transform.lossyScale.GetScaled(_parent.scale3DForCalc).IsVisible() // Scale is not visible.
                 || (!_particleSystem.IsAlive() && !_particleSystem.isPlaying) // No particle.
                 || (_isTrail && !_particleSystem.trails.enabled) // Trail, but it is not enabled.
-#if UNITY_2018_3_OR_NEWER
-                || canvasRenderer.GetInheritedAlpha() <
-                0.01f // #102: Do not bake particle system to mesh when the alpha is zero.
-#endif
             )
             {
+                // Skip clearing the mesh if it's already cleared.
+                if (_meshCleared) return;
+
                 Profiler.BeginSample("[UIParticleRenderer] Clear Mesh");
                 workerMesh.Clear();
                 canvasRenderer.SetMesh(workerMesh);
                 _lastBounds = new Bounds();
+                _meshCleared = true;
                 Profiler.EndSample();
 
                 return;
             }
 
+            // Reset custom data.
+            // var customData = _particleSystem.customData;
+            // if (!customData.enabled || customData.GetMode(ParticleSystemCustomData.Custom1) == ParticleSystemCustomDataMode.Disabled)
+            // {
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 0, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 1, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 2, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 3, 0);
+            // }
+            //
+            // if (!customData.enabled || customData.GetMode(ParticleSystemCustomData.Custom2) == ParticleSystemCustomDataMode.Disabled)
+            // {
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 0, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 1, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 2, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 3, 0);
+            // }
+
+            _meshCleared = false;
             var main = _particleSystem.main;
             var scale = GetWorldScale();
             var psPos = _particleSystem.transform.position;
 
             // Simulate particles.
             Profiler.BeginSample("[UIParticle] Bake Mesh > Simulate Particles");
-            if (!_isTrail && _parent.canSimulate)
+            if (!_isTrail && _parent.canSimulate && !_mainEmitter)
             {
 #if UNITY_EDITOR
                 if (!Application.isPlaying)
@@ -303,6 +335,13 @@ namespace Coffee.UIExtensions
 #endif
                 {
                     ResolveResolutionChange(psPos, scale);
+
+                    // fix: second and subsequent bursts not displayed when world simulation and non-looping. (#326)
+                    if (!_particleSystem.IsLocalSpace() && !main.loop && _particleSystem.time == 0)
+                    {
+                        _delay = true;
+                    }
+
                     Simulate(scale, _parent.isPaused || _delay);
 
                     if (_delay && !_parent.isPaused)
@@ -405,95 +444,67 @@ namespace Coffee.UIExtensions
                 _lastBounds = bounds;
 
                 // Convert linear color to gamma color.
-                if (QualitySettings.activeColorSpace == ColorSpace.Linear)
+                if (UIParticleProjectSettings.autoColorCorrection && canvas.ShouldGammaToLinearInMesh())
                 {
-                    Profiler.BeginSample("[UIParticleRenderer] Convert Linear to Gamma");
+                    workerMesh.LinearToGamma();
-                    workerMesh.GetColors(s_Colors);
-                    var count_c = s_Colors.Count;
-                    for (var i = 0; i < count_c; i++)
-                    {
-                        var c = s_Colors[i];
-                        c.r = c.r.LinearToGamma();
-                        c.g = c.g.LinearToGamma();
-                        c.b = c.b.LinearToGamma();
-                        s_Colors[i] = c;
-                    }
-
-                    workerMesh.SetColors(s_Colors);
-                    Profiler.EndSample();
                 }
 
-                GetComponents(typeof(IMeshModifier), s_Components);
+                var components = InternalListPool<Component>.Rent();
-                for (var i = 0; i < s_Components.Count; i++)
+                GetComponents(typeof(IMeshModifier), components);
+                for (var i = 0; i < components.Count; i++)
                 {
 #pragma warning disable CS0618 // Type or member is obsolete
-                    ((IMeshModifier)s_Components[i]).ModifyMesh(workerMesh);
+                    ((IMeshModifier)components[i]).ModifyMesh(workerMesh);
 #pragma warning restore CS0618 // Type or member is obsolete
                 }
 
-                s_Components.Clear();
+                InternalListPool<Component>.Return(ref components);
             }
 
             Profiler.EndSample();
 
-
-            // Get grouped renderers.
-            s_Renderers.Clear();
-            if (_parent.useMeshSharing)
-            {
-                UIParticleUpdater.GetGroupedRenderers(_parent.groupId, _index, s_Renderers);
-            }
-
-            // Set mesh to the CanvasRenderer.
-            Profiler.BeginSample("[UIParticleRenderer] Set Mesh");
-            for (var i = 0; i < s_Renderers.Count; i++)
-            {
-                if (s_Renderers[i] == this) continue;
-                s_Renderers[i].canvasRenderer.SetMesh(workerMesh);
-                s_Renderers[i]._lastBounds = _lastBounds;
-            }
-
-            if (!_parent.canRender)
-            {
-                workerMesh.Clear();
-            }
-
-            canvasRenderer.SetMesh(workerMesh);
-            Profiler.EndSample();
-
             // Update animatable material properties.
             Profiler.BeginSample("[UIParticleRenderer] Update Animatable Material Properties");
-
-#if UNITY_EDITOR
-            if (_modifiedMaterial != material)
-            {
-                _renderer.GetSharedMaterials(s_Materials);
-                material = s_Materials[_isTrail ? 1 : 0];
-                s_Materials.Clear();
-                SetMaterialDirty();
-            }
-#endif
-
             UpdateMaterialProperties();
+            Profiler.EndSample();
+
+            // Get grouped renderers.
+            Profiler.BeginSample("[UIParticleRenderer] Set Mesh");
+            var renderers = InternalListPool<UIParticleRenderer>.Rent();
             if (_parent.useMeshSharing)
             {
-                if (!_currentMaterialForRendering)
+                UIParticleUpdater.GetGroupedRenderers(_parent.groupId, _index, renderers);
-                {
+            }
-                    _currentMaterialForRendering = materialForRendering;
-                }
 
-                for (var i = 0; i < s_Renderers.Count; i++)
+            for (var i = 0; i < renderers.Count; i++)
-                {
+            {
-                    if (s_Renderers[i] == this) continue;
+                var r = renderers[i];
+                if (r == this) continue;
 
-                    s_Renderers[i].canvasRenderer.materialCount = 1;
+                r.canvasRenderer.SetMesh(workerMesh);
-                    s_Renderers[i].canvasRenderer.SetMaterial(_currentMaterialForRendering, 0);
+                r._lastBounds = _lastBounds;
-                }
+                r.canvasRenderer.materialCount = 1;
+                r.canvasRenderer.SetMaterial(materialForRendering, 0);
+            }
+
+            InternalListPool<UIParticleRenderer>.Return(ref renderers);
+
+            if (_parent.canRender)
+            {
+                canvasRenderer.SetMesh(workerMesh);
+            }
+            else
+            {
+                workerMesh.Clear();
             }
 
             Profiler.EndSample();
+        }
 
-            s_Renderers.Clear();
+        public override void SetMaterialDirty()
+        {
+            _materialForRendering = null;
+            base.SetMaterialDirty();
         }
 
         /// <summary>
@@ -559,6 +570,30 @@ namespace Coffee.UIExtensions
                     return Matrix4x4.Translate(psPos)
                            * Matrix4x4.Scale(scale);
                 case ParticleSystemSimulationSpace.World:
+                    if (_isTrail)
+                    {
+                        return Matrix4x4.Translate(psPos)
+                               * Matrix4x4.Scale(scale)
+                               * Matrix4x4.Translate(-psPos);
+                    }
+
+                    if (_mainEmitter)
+                    {
+                        if (_mainEmitter.IsLocalSpace())
+                        {
+                            return Matrix4x4.Translate(psPos)
+                                   * Matrix4x4.Scale(scale)
+                                   * Matrix4x4.Translate(-psPos);
+                        }
+                        else
+                        {
+                            psPos = _particleSystem.transform.position - _mainEmitter.transform.position;
+                            return Matrix4x4.Translate(psPos)
+                                   * Matrix4x4.Scale(scale)
+                                   * Matrix4x4.Translate(-psPos);
+                        }
+                    }
+
                     return Matrix4x4.Scale(scale);
                 case ParticleSystemSimulationSpace.Custom:
                     return Matrix4x4.Translate(_particleSystem.main.customSimulationSpace.position.GetScaled(scale))
@@ -621,6 +656,7 @@ namespace Coffee.UIExtensions
                 : main.useUnscaledTime
                     ? Time.unscaledDeltaTime
                     : Time.deltaTime;
+            deltaTime *= _parent.timeScaleMultiplier;
 
             // Pre-warm:
             if (0 < deltaTime && _preWarm)
@@ -701,12 +737,12 @@ namespace Coffee.UIExtensions
             if (s_Mpb.isEmpty) return;
 
             // #41: Copy the value from MaterialPropertyBlock to CanvasRenderer
-            if (!_modifiedMaterial) return;
+            if (materialForRendering == null) return;
 
             for (var i = 0; i < _parent.m_AnimatableProperties.Length; i++)
             {
                 var ap = _parent.m_AnimatableProperties[i];
-                ap.UpdateMaterialProperties(_modifiedMaterial, s_Mpb);
+                ap.UpdateMaterialProperties(materialForRendering, s_Mpb);
             }
 
             s_Mpb.Clear();

Runtime/UIParticleUpdater.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using Coffee.UIParticleInternal;
 using UnityEditor;
 using UnityEngine;
 
@@ -15,38 +16,61 @@ namespace Coffee.UIExtensions
 
         public static void Register(UIParticle particle)
         {
-            if (!particle) return;
+            if (particle == null) return;
             s_ActiveParticles.Add(particle);
         }
 
         public static void Unregister(UIParticle particle)
         {
-            if (!particle) return;
+            if (particle == null) return;
             s_ActiveParticles.Remove(particle);
         }
 
         public static void Register(UIParticleAttractor attractor)
         {
-            if (!attractor) return;
+            if (attractor == null) return;
             s_ActiveAttractors.Add(attractor);
         }
 
         public static void Unregister(UIParticleAttractor attractor)
         {
-            if (!attractor) return;
+            if (attractor == null) return;
             s_ActiveAttractors.Remove(attractor);
         }
 
 #if UNITY_EDITOR
-        [InitializeOnLoadMethod]
+#if UNITY_2019_3_OR_NEWER
-#else
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
-        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
+        private static void OnDomainReload()
+        {
+            s_ActiveParticles.Clear();
+            s_ActiveAttractors.Clear();
+            s_UpdatedGroupIds.Clear();
+            s_FrameCount = 0;
+        }
 #endif
+
+        [InitializeOnLoadMethod]
         private static void InitializeOnLoad()
         {
-            Canvas.willRenderCanvases -= Refresh;
+            UIExtraCallbacks.onAfterCanvasRebuild += Refresh;
-            Canvas.willRenderCanvases += Refresh;
+
+            EditorApplication.playModeStateChanged += state =>
+            {
+                UIExtraCallbacks.onAfterCanvasRebuild -= Refresh;
+                if (state == PlayModeStateChange.EnteredEditMode || state == PlayModeStateChange.EnteredPlayMode)
+                {
+                    UIExtraCallbacks.onAfterCanvasRebuild += Refresh;
+                }
+            };
         }
+#else
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
+        private static void InitializeOnLoad()
+        {
+            UIExtraCallbacks.onAfterCanvasRebuild += Refresh;
+        }
+#endif
 
         private static void Refresh()
         {
@@ -58,7 +82,7 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < s_ActiveParticles.Count; i++)
             {
                 var uip = s_ActiveParticles[i];
-                if (!uip || !uip.canvas || !uip.isPrimary || !s_UpdatedGroupIds.Add(uip.groupId)) continue;
+                if (uip == null || uip.canvas == null || !uip.isPrimary || !s_UpdatedGroupIds.Add(uip.groupId)) continue;
 
                 uip.UpdateTransformScale();
                 uip.UpdateRenderers();
@@ -68,7 +92,7 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < s_ActiveParticles.Count; i++)
             {
                 var uip = s_ActiveParticles[i];
-                if (!uip || !uip.canvas) continue;
+                if (uip == null || uip.canvas == null) continue;
 
                 uip.UpdateTransformScale();
 
@@ -112,7 +136,7 @@ namespace Coffee.UIExtensions
                 var uip = s_ActiveParticles[i];
                 if (!uip.useMeshSharing || uip.groupId != groupId) continue;
                 if (uip.isPrimary) return uip;
-                if (!primary && uip.canSimulate) primary = uip;
+                if (primary == null && uip.canSimulate) primary = uip;
             }
 
             return primary;

Runtime/Utilities.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 66c42f0f30de84ca4bd8305a1188af85
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Utilities/ParticleSystemExtensions.cs

@@ -1,96 +1,11 @@
 using System;
 using System.Collections.Generic;
-using System.Reflection;
 using UnityEngine;
 using Object = UnityEngine.Object;
 
-namespace Coffee.UIParticleExtensions
+namespace Coffee.UIParticleInternal
 {
-    public static class Color32Extensions
+    internal static class ParticleSystemExtensions
-    {
-        private static byte[] s_LinearToGammaLut;
-
-        public static byte LinearToGamma(this byte self)
-        {
-            if (s_LinearToGammaLut == null)
-            {
-                s_LinearToGammaLut = new byte[256];
-                for (var i = 0; i < 256; i++)
-                {
-                    s_LinearToGammaLut[i] = (byte)(Mathf.LinearToGammaSpace(i / 255f) * 255f);
-                }
-            }
-
-            return s_LinearToGammaLut[self];
-        }
-    }
-
-    public static class Vector3Extensions
-    {
-        public static Vector3 Inverse(this Vector3 self)
-        {
-            self.x = Mathf.Approximately(self.x, 0) ? 1 : 1 / self.x;
-            self.y = Mathf.Approximately(self.y, 0) ? 1 : 1 / self.y;
-            self.z = Mathf.Approximately(self.z, 0) ? 1 : 1 / self.z;
-            return self;
-        }
-
-        public static Vector3 GetScaled(this Vector3 self, Vector3 other1)
-        {
-            self.Scale(other1);
-            return self;
-        }
-
-        public static Vector3 GetScaled(this Vector3 self, Vector3 other1, Vector3 other2)
-        {
-            self.Scale(other1);
-            self.Scale(other2);
-            return self;
-        }
-
-        public static Vector3 GetScaled(this Vector3 self, Vector3 other1, Vector3 other2, Vector3 other3)
-        {
-            self.Scale(other1);
-            self.Scale(other2);
-            self.Scale(other3);
-            return self;
-        }
-
-        public static bool IsVisible(this Vector3 self)
-        {
-            return 0 < Mathf.Abs(self.x * self.y * self.z);
-        }
-    }
-
-    internal static class SpriteExtensions
-    {
-#if UNITY_EDITOR
-        private static readonly Type s_SpriteEditorExtensionType =
-            Type.GetType("UnityEditor.Experimental.U2D.SpriteEditorExtension, UnityEditor")
-            ?? Type.GetType("UnityEditor.U2D.SpriteEditorExtension, UnityEditor");
-
-        private static readonly MethodInfo s_GetActiveAtlasTextureMethodInfo = s_SpriteEditorExtensionType
-            .GetMethod("GetActiveAtlasTexture", BindingFlags.Static | BindingFlags.NonPublic);
-
-        public static Texture2D GetActualTexture(this Sprite self)
-        {
-            if (!self) return null;
-
-            if (Application.isPlaying) return self.texture;
-            var ret = s_GetActiveAtlasTextureMethodInfo.Invoke(null, new object[] { self }) as Texture2D;
-            return ret
-                ? ret
-                : self.texture;
-        }
-#else
-        internal static Texture2D GetActualTexture(this Sprite self)
-        {
-            return self ? self.texture : null;
-        }
-#endif
-    }
-
-    public static class ParticleSystemExtensions
     {
         private static ParticleSystem.Particle[] s_TmpParticles = new ParticleSystem.Particle[2048];
 
@@ -98,11 +13,7 @@ namespace Coffee.UIParticleExtensions
         {
             if (s_TmpParticles.Length < size)
             {
-                while (s_TmpParticles.Length < size)
+                size = Mathf.NextPowerOfTwo(size);
-                {
-                    size = Mathf.NextPowerOfTwo(size);
-                }
-
                 s_TmpParticles = new ParticleSystem.Particle[size];
             }
 
@@ -173,15 +84,15 @@ namespace Coffee.UIParticleExtensions
                 var bRenderer = b.GetComponent<ParticleSystemRenderer>();
 
                 // Render queue: ascending
-                var aMat = aRenderer.sharedMaterial ? aRenderer.sharedMaterial : aRenderer.trailMaterial;
+                var aMat = aRenderer.sharedMaterial != null ? aRenderer.sharedMaterial : aRenderer.trailMaterial;
-                var bMat = bRenderer.sharedMaterial ? bRenderer.sharedMaterial : bRenderer.trailMaterial;
+                var bMat = bRenderer.sharedMaterial != null ? bRenderer.sharedMaterial : bRenderer.trailMaterial;
-                if (!aMat && !bMat) return 0;
+                if (aMat == null && bMat == null) return 0;
-                if (!aMat) return -1;
+                if (aMat == null) return -1;
-                if (!bMat) return 1;
+                if (bMat == null) return 1;
 
                 if (sortByMaterial)
                 {
-                    return aMat.GetInstanceID() - bMat.GetInstanceID();
+                    return aMat.GetHashCode() - bMat.GetHashCode();
                 }
 
                 if (aMat.renderQueue != bMat.renderQueue)
@@ -220,7 +131,7 @@ namespace Coffee.UIParticleExtensions
         {
             for (var i = 0; i < list.Count; i++)
             {
-                if (list[i].GetInstanceID() == ps.GetInstanceID())
+                if (list[i].GetHashCode() == ps.GetHashCode())
                 {
                     return i;
                 }
@@ -231,7 +142,7 @@ namespace Coffee.UIParticleExtensions
 
         public static Texture2D GetTextureForSprite(this ParticleSystem self)
         {
-            if (!self) return null;
+            if (self == null) return null;
 
             // Get sprite's texture.
             var tsaModule = self.textureSheetAnimation;
@@ -240,7 +151,7 @@ namespace Coffee.UIParticleExtensions
             for (var i = 0; i < tsaModule.spriteCount; i++)
             {
                 var sprite = tsaModule.GetSprite(i);
-                if (!sprite) continue;
+                if (sprite == null) continue;
 
                 return sprite.GetActualTexture();
             }
@@ -250,59 +161,40 @@ namespace Coffee.UIParticleExtensions
 
         public static void Exec(this List<ParticleSystem> self, Action<ParticleSystem> action)
         {
-            self.RemoveAll(p => !p);
+            foreach (var p in self)
-            self.ForEach(action);
-        }
-    }
-
-    internal static class Misc
-    {
-        public static void Destroy(Object obj)
-        {
-            if (!obj) return;
-#if UNITY_EDITOR
-            if (!Application.isPlaying)
             {
-                Object.DestroyImmediate(obj);
+                if (p == null) continue;
-            }
+                action.Invoke(p);
-            else
-#endif
-            {
-                Object.Destroy(obj);
             }
         }
 
-        public static void DestroyImmediate(Object obj)
+        public static ParticleSystem GetMainEmitter(this ParticleSystem self, List<ParticleSystem> list)
         {
-            if (!obj) return;
+            if (self == null || list == null || list.Count == 0) return null;
-#if UNITY_EDITOR
-            if (Application.isEditor)
-            {
-                Object.DestroyImmediate(obj);
-            }
-            else
-#endif
-            {
-                Object.Destroy(obj);
-            }
-        }
 
-#if !UNITY_2021_2_OR_NEWER && !UNITY_2020_3_45 && !UNITY_2020_3_46 && !UNITY_2020_3_47 && !UNITY_2020_3_48
+            for (var i = 0; i < list.Count; i++)
-        public static T GetComponentInParent<T>(this Component self, bool includeInactive) where T : Component
-        {
-            if (!self) return null;
-            if (!includeInactive) return self.GetComponentInParent<T>();
-
-            var current = self.transform;
-            while (current)
             {
-                var component = current.GetComponent<T>();
+                var parent = list[i];
-                if (component) return component;
+                if (parent != self && IsSubEmitterOf(self, parent)) return parent;
-                current = current.parent;
             }
 
             return null;
         }
-#endif
+
+        public static bool IsSubEmitterOf(this ParticleSystem self, ParticleSystem parent)
+        {
+            if (self == null || parent == null) return false;
+
+            var subEmitters = parent.subEmitters;
+            if (!subEmitters.enabled) return false; // No sub emitters.
+
+            var count = subEmitters.subEmittersCount;
+            for (var i = 0; i < count; i++)
+            {
+                if (subEmitters.GetSubEmitterSystem(i) == self) return true;
+            }
+
+            return false;
+        }
     }
 }

Runtime/Utilities/ParticleSystemExtensions.cs.meta

@@ -0,0 +1,11 @@
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+guid: e51604bfb810e44519e2710fd1b8af90
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Samples~/Demo/Animations/ColorArrayInjection.cs

@@ -0,0 +1,32 @@
+using System.Linq;
+using UnityEngine;
+
+[RequireComponent(typeof(ParticleSystemRenderer))]
+public class ColorArrayInjection : MonoBehaviour
+{
+    [SerializeField] private string m_PropertyName = "_Color2";
+
+    [SerializeField] private Color[] m_Colors = new Color[4]
+    {
+        Color.red,
+        Color.green,
+        Color.blue,
+        Color.yellow
+    };
+
+    private void OnEnable()
+    {
+        if (TryGetComponent<ParticleSystemRenderer>(out var psr))
+        {
+            var mpb = new MaterialPropertyBlock();
+            psr.GetPropertyBlock(mpb);
+            mpb.SetVectorArray(m_PropertyName, m_Colors.Select(x => new Vector4(x.r, x.g, x.b, 1.0f)).ToArray());
+            psr.SetPropertyBlock(mpb);
+        }
+    }
+
+    private void OnValidate()
+    {
+        OnEnable();
+    }
+}

Samples~/Demo/Animations/ColorArrayInjection.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: da4c2e90ecd3d4dd4a520099c08cf493
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Samples~/Demo/Materials/UIAdditive+Color.shader

@@ -0,0 +1,160 @@
+Shader "UI/Additive And Color"
+{
+    Properties
+    {
+        _MainTex ("Sprite Texture", 2D) = "white" {}
+        _Color ("Tint", Color) = (1,1,1,1)
+
+        _StencilComp ("Stencil Comparison", Float) = 8
+        _Stencil ("Stencil ID", Float) = 0
+        _StencilOp ("Stencil Operation", Float) = 0
+        _StencilWriteMask ("Stencil Write Mask", Float) = 255
+        _StencilReadMask ("Stencil Read Mask", Float) = 255
+
+        _ColorMask ("Color Mask", Float) = 15
+
+        [Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip ("Use Alpha Clip", Float) = 0
+    }
+
+    SubShader
+    {
+        Tags
+        {
+            "Queue"="Transparent"
+            "IgnoreProjector"="True"
+            "RenderType"="Transparent"
+            "PreviewType"="Plane"
+            "CanUseSpriteAtlas"="True"
+        }
+
+        Stencil
+        {
+            Ref [_Stencil]
+            Comp [_StencilComp]
+            Pass [_StencilOp]
+            ReadMask [_StencilReadMask]
+            WriteMask [_StencilWriteMask]
+        }
+
+        Cull Off
+        Lighting Off
+        ZWrite Off
+        ZTest [unity_GUIZTestMode]
+        Fog { Mode Off }
+        Blend One One
+        ColorMask [_ColorMask]
+
+        Pass
+        {
+            Name "Default"
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            #pragma target 2.0
+
+            #include "UnityCG.cginc"
+            #include "UnityUI.cginc"
+
+            #pragma multi_compile __ UNITY_UI_CLIP_RECT
+            #pragma multi_compile __ UNITY_UI_ALPHACLIP
+
+            struct appdata_t
+            {
+                float4 vertex : POSITION;
+                float4 color : COLOR;
+                float2 texcoord : TEXCOORD0;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            struct v2f
+            {
+                float4 vertex : SV_POSITION;
+                fixed4 color : COLOR;
+                float2 texcoord : TEXCOORD0;
+                float4 worldPosition : TEXCOORD1;
+                float4 mask : TEXCOORD2;
+                UNITY_VERTEX_OUTPUT_STEREO
+            };
+
+            fixed4 _Color;
+            sampler2D _MainTex;
+            float4 _MainTex_ST;
+            fixed4 _TextureSampleAdd;
+            float4 _ClipRect;
+            float _UIMaskSoftnessX;
+            float _UIMaskSoftnessY;
+            int _UIVertexColorAlwaysGammaSpace;
+            #define LENGTH 4
+            float4 _Color2[4];
+
+            half3 _UIGammaToLinear(half3 value)
+            {
+                half3 low = 0.0849710 * value - 0.000163029;
+                half3 high = value * (value * (value * 0.265885 + 0.736584) - 0.00980184) + 0.00319697;
+
+                // We should be 0.5 away from any actual gamma value stored in an 8 bit channel
+                const half3 split = (half3)0.0725490; // Equals 18.5 / 255
+                return (value < split) ? low : high;
+            }
+
+            v2f vert(appdata_t v)
+            {
+                v2f OUT;
+                UNITY_SETUP_INSTANCE_ID(v);
+                UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
+                float4 vPosition = UnityObjectToClipPos(v.vertex);
+                OUT.worldPosition = v.vertex;
+                OUT.vertex = vPosition;
+
+                float2 pixelSize = vPosition.w;
+                pixelSize /= float2(1, 1) * abs(mul((float2x2)UNITY_MATRIX_P, _ScreenParams.xy));
+
+                float4 clampedRect = clamp(_ClipRect, -2e10, 2e10);
+                float2 maskUV = (v.vertex.xy - clampedRect.xy) / (clampedRect.zw - clampedRect.xy);
+                OUT.texcoord = TRANSFORM_TEX(v.texcoord.xy, _MainTex);
+                OUT.mask = float4(v.vertex.xy * 2 - clampedRect.xy - clampedRect.zw, 0.25 / (0.25 * half2(_UIMaskSoftnessX, _UIMaskSoftnessY) + abs(pixelSize.xy)));
+
+                if (_UIVertexColorAlwaysGammaSpace)
+                {
+                    #ifndef UNITY_COLORSPACE_GAMMA
+                    v.color.rgb = _UIGammaToLinear(v.color.rgb);
+                    #endif
+                }
+
+                OUT.color = v.color * _Color;
+                return OUT;
+            }
+
+            fixed4 frag(v2f IN) : SV_Target
+            {
+                //Round up the alpha color coming from the interpolator (to 1.0/256.0 steps)
+                //The incoming alpha could have numerical instability, which makes it very sensible to
+                //HDR color transparency blend, when it blends with the world's texture.
+                const half alphaPrecision = half(0xff);
+                const half invAlphaPrecision = half(1.0 / alphaPrecision);
+                IN.color.a = round(IN.color.a * alphaPrecision) * invAlphaPrecision;
+
+                half4 color = IN.color * (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd);
+
+                #ifdef UNITY_UI_CLIP_RECT
+                half2 m = saturate((_ClipRect.zw - _ClipRect.xy - abs(IN.mask.xy)) * IN.mask.zw);
+                color.a *= m.x * m.y;
+                #endif
+
+                #ifdef UNITY_UI_ALPHACLIP
+                clip(color.a - 0.001);
+                #endif
+
+                fixed3 fc = _Color2[floor(color.r*LENGTH-0.01)].rgb;
+                if (0.1 < fc.r || 0.1 < fc.g || 0.1 < fc.b)
+                {
+                    color.rgb = fc;
+                }
+                color.rgb *= color.a;
+
+                return color;
+            }
+            ENDCG
+        }
+    }
+}

Samples~/Demo/Materials/UIAdditive+Color.shader.meta

@@ -0,0 +1,9 @@
+fileFormatVersion: 2
+guid: 9cc9ed37ff19d40e684526abbc1d44a6
+ShaderImporter:
+  externalObjects: {}
+  defaultTextures: []
+  nonModifiableTextures: []
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Samples~/Demo/Materials/UIParticle_Demo_Animatable+Color.mat

@@ -0,0 +1,90 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!21 &2100000
+Material:
+  serializedVersion: 8
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_Name: UIParticle_Demo_Animatable+Color
+  m_Shader: {fileID: 4800000, guid: 9cc9ed37ff19d40e684526abbc1d44a6, type: 3}
+  m_Parent: {fileID: 0}
+  m_ModifiedSerializedProperties: 0
+  m_ValidKeywords: []
+  m_InvalidKeywords: []
+  m_LightmapFlags: 4
+  m_EnableInstancingVariants: 0
+  m_DoubleSidedGI: 0
+  m_CustomRenderQueue: -1
+  stringTagMap: {}
+  disabledShaderPasses: []
+  m_LockedProperties: 
+  m_SavedProperties:
+    serializedVersion: 3
+    m_TexEnvs:
+    - _BumpMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _DetailAlbedoMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _DetailMask:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _DetailNormalMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _EmissionMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _MainTex:
+        m_Texture: {fileID: 10300, guid: 0000000000000000f000000000000000, type: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _MetallicGlossMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _OcclusionMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    - _ParallaxMap:
+        m_Texture: {fileID: 0}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
+    m_Ints: []
+    m_Floats:
+    - _BumpScale: 1
+    - _ColorMask: 15
+    - _Cutoff: 0.5
+    - _DetailNormalMapScale: 1
+    - _DstBlend: 0
+    - _GlossMapScale: 1
+    - _Glossiness: 0.5
+    - _GlossyReflections: 1
+    - _Metallic: 0
+    - _Mode: 0
+    - _OcclusionStrength: 1
+    - _Parallax: 0.02
+    - _SmoothnessTextureChannel: 0
+    - _SpecularHighlights: 1
+    - _SrcBlend: 1
+    - _Stencil: 0
+    - _StencilComp: 8
+    - _StencilOp: 0
+    - _StencilReadMask: 255
+    - _StencilWriteMask: 255
+    - _UVSec: 0
+    - _UseUIAlphaClip: 0
+    - _ZWrite: 1
+    m_Colors:
+    - _Color: {r: 1, g: 1, b: 1, a: 1}
+    - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}
+  m_BuildTextureStacks: []

Samples~/Demo/Materials/UIParticle_Demo_Animatable+Color.mat.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 81f29a831022a4756b17daa366d67e10
+NativeFormatImporter:
+  externalObjects: {}
+  mainObjectFileID: 2100000
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Samples~/Demo/Materials/UIParticle_Demo_Animatable.mat

@@ -8,8 +8,8 @@ Material:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_Name: UIParticle_Demo_Animatable
-  m_Shader: {fileID: 4800000, guid: ecfa8f5732b504ef98fba10aa18d0326, type: 3}
+  m_Shader: {fileID: 4800000, guid: 9cc9ed37ff19d40e684526abbc1d44a6, type: 3}
-  m_ShaderKeywords: 
+  m_Parent: {fileID: 0}
   m_LightmapFlags: 4
   m_EnableInstancingVariants: 0
   m_DoubleSidedGI: 0

Samples~/Demo/Prefabs/UIParticle_Demo_Animatable.prefab

@@ -69,6 +69,8 @@ MonoBehaviour:
   m_AnimatableProperties:
   - m_Name: _MainTex_ST
     m_Type: 1
+  - m_Name: _Color2
+    m_Type: 103
   m_Particles:
   - {fileID: 198637387440798640}
   m_MeshSharing: 0
@@ -88,6 +90,7 @@ GameObject:
   - component: {fileID: 199176884810573912}
   - component: {fileID: 222047182059782320}
   - component: {fileID: 95475093951880840}
+  - component: {fileID: 3543952012814938654}
   m_Layer: 0
   m_Name: UvAnimParticle
   m_TagString: Untagged
@@ -4864,3 +4867,21 @@ Animator:
   m_HasTransformHierarchy: 1
   m_AllowConstantClipSamplingOptimization: 1
   m_KeepAnimatorControllerStateOnDisable: 0
+--- !u!114 &3543952012814938654
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1349193913114882}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: da4c2e90ecd3d4dd4a520099c08cf493, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_PropertyName: _Color2
+  m_Colors:
+  - {r: 1, g: 0, b: 0, a: 1}
+  - {r: 0, g: 1, b: 0, a: 1}
+  - {r: 0, g: 0, b: 1, a: 1}
+  - {r: 1, g: 0.92156863, b: 0.015686275, a: 1}

Samples~/Demo/Scripts/CopyItemOnStart.cs

@@ -15,7 +15,7 @@ namespace Coffee.UIExtensions.Demo
 
         private void Start()
         {
-            if (!m_Origin) return;
+            if (m_Origin == null) return;
             m_Origin.SetActive(false);
 
             var parent = m_Origin.transform.parent;

Samples~/Demo/Scripts/UIElementDragger.cs

@@ -42,7 +42,7 @@ public class UIElementDragger : MonoBehaviour, IBeginDragHandler, IDragHandler,
                 break;
             case Target.Custom:
                 _rectTransform.localPosition += delta;
-                if (m_CustomTarget)
+                if (m_CustomTarget != null)
                 {
                     if (m_UseCanvasScale)
                     {

Samples~/Demo/Scripts/UIParticle_Demo.cs

@@ -1,3 +1,4 @@
+using Coffee.UIParticleInternal;
 using UnityEngine;
 using UnityEngine.Serialization;
 using UnityEngine.UI;
@@ -51,11 +52,7 @@ namespace Coffee.UIExtensions.Demo
 
         public void EnableAnimations(bool flag)
         {
-#if UNITY_2023_1_OR_NEWER
+            foreach (var animator in Misc.FindObjectsOfType<Animator>())
-            foreach (var animator in FindObjectsByType<Animator>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-            foreach (var animator in FindObjectsOfType<Animator>())
-#endif
             {
                 animator.enabled = flag;
             }
@@ -83,11 +80,7 @@ namespace Coffee.UIExtensions.Demo
 
         public void UIParticle_Scale(float scale)
         {
-#if UNITY_2023_1_OR_NEWER
+            foreach (var uip in Misc.FindObjectsOfType<UIParticle>())
-            foreach (var uip in FindObjectsByType<UIParticle>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-            foreach (var uip in FindObjectsOfType<UIParticle>())
-#endif
             {
                 uip.scale = scale;
             }
@@ -95,11 +88,7 @@ namespace Coffee.UIExtensions.Demo
 
         public void ParticleSystem_WorldSpaseSimulation(bool flag)
         {
-#if UNITY_2023_1_OR_NEWER
+            foreach (var p in Misc.FindObjectsOfType<ParticleSystem>())
-            foreach (var p in FindObjectsByType<ParticleSystem>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-            foreach (var p in FindObjectsOfType<ParticleSystem>())
-#endif
             {
                 var main = p.main;
                 main.simulationSpace = flag
@@ -135,11 +124,7 @@ namespace Coffee.UIExtensions.Demo
 
         public void ParticleSystem_SetScale(float scale)
         {
-#if UNITY_2023_1_OR_NEWER
+            foreach (var ps in Misc.FindObjectsOfType<ParticleSystem>())
-            foreach (var ps in FindObjectsByType<ParticleSystem>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-            foreach (var ps in FindObjectsOfType<ParticleSystem>())
-#endif
             {
                 ps.transform.localScale = new Vector3(scale, scale, scale);
             }

Shaders/UIAdditive.shader

@@ -42,7 +42,6 @@
         ZTest [unity_GUIZTestMode]
         Fog { Mode Off }
         Blend One One
-
         ColorMask [_ColorMask]
 
         Pass
@@ -61,18 +60,19 @@
 
             struct appdata_t
             {
-                float4 vertex   : POSITION;
+                float4 vertex : POSITION;
-                float4 color    : COLOR;
+                float4 color : COLOR;
                 float2 texcoord : TEXCOORD0;
                 UNITY_VERTEX_INPUT_INSTANCE_ID
             };
 
             struct v2f
             {
-                float4 vertex           : SV_POSITION;
+                float4 vertex : SV_POSITION;
-                fixed4 color            : COLOR;
+                fixed4 color : COLOR;
-                float2 texcoord         : TEXCOORD0;
+                float2 texcoord : TEXCOORD0;
-                float4 worldPosition    : TEXCOORD1;
+                float4 worldPosition : TEXCOORD1;
+                float4 mask : TEXCOORD2;
                 UNITY_VERTEX_OUTPUT_STEREO
             };
 
@@ -81,16 +81,43 @@
             float4 _MainTex_ST;
             fixed4 _TextureSampleAdd;
             float4 _ClipRect;
+            float _UIMaskSoftnessX;
+            float _UIMaskSoftnessY;
+            int _UIVertexColorAlwaysGammaSpace;
+
+            half3 _UIGammaToLinear(half3 value)
+            {
+                half3 low = 0.0849710 * value - 0.000163029;
+                half3 high = value * (value * (value * 0.265885 + 0.736584) - 0.00980184) + 0.00319697;
+
+                // We should be 0.5 away from any actual gamma value stored in an 8 bit channel
+                const half3 split = (half3)0.0725490; // Equals 18.5 / 255
+                return (value < split) ? low : high;
+            }
 
             v2f vert(appdata_t v)
             {
                 v2f OUT;
                 UNITY_SETUP_INSTANCE_ID(v);
                 UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
+                float4 vPosition = UnityObjectToClipPos(v.vertex);
                 OUT.worldPosition = v.vertex;
-                OUT.vertex = UnityObjectToClipPos(OUT.worldPosition);
+                OUT.vertex = vPosition;
 
-                OUT.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);
+                float2 pixelSize = vPosition.w;
+                pixelSize /= float2(1, 1) * abs(mul((float2x2)UNITY_MATRIX_P, _ScreenParams.xy));
+
+                float4 clampedRect = clamp(_ClipRect, -2e10, 2e10);
+                float2 maskUV = (v.vertex.xy - clampedRect.xy) / (clampedRect.zw - clampedRect.xy);
+                OUT.texcoord = TRANSFORM_TEX(v.texcoord.xy, _MainTex);
+                OUT.mask = float4(v.vertex.xy * 2 - clampedRect.xy - clampedRect.zw, 0.25 / (0.25 * half2(_UIMaskSoftnessX, _UIMaskSoftnessY) + abs(pixelSize.xy)));
+
+                if (_UIVertexColorAlwaysGammaSpace)
+                {
+                    #ifndef UNITY_COLORSPACE_GAMMA
+                    v.color.rgb = _UIGammaToLinear(v.color.rgb);
+                    #endif
+                }
 
                 OUT.color = v.color * _Color;
                 return OUT;
@@ -98,17 +125,26 @@
 
             fixed4 frag(v2f IN) : SV_Target
             {
-                half4 color = (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd) * IN.color;
+                //Round up the alpha color coming from the interpolator (to 1.0/256.0 steps)
+                //The incoming alpha could have numerical instability, which makes it very sensible to
+                //HDR color transparency blend, when it blends with the world's texture.
+                const half alphaPrecision = half(0xff);
+                const half invAlphaPrecision = half(1.0 / alphaPrecision);
+                IN.color.a = round(IN.color.a * alphaPrecision) * invAlphaPrecision;
+
+                half4 color = IN.color * (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd);
 
                 #ifdef UNITY_UI_CLIP_RECT
-                    color.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect);
+                half2 m = saturate((_ClipRect.zw - _ClipRect.xy - abs(IN.mask.xy)) * IN.mask.zw);
+                color.a *= m.x * m.y;
                 #endif
 
                 #ifdef UNITY_UI_ALPHACLIP
-                    clip (color.a - 0.001);
+                clip(color.a - 0.001);
                 #endif
 
                 color.rgb *= color.a;
+
                 return color;
             }
             ENDCG

package.json

@@ -2,7 +2,7 @@
   "name": "com.coffee.ui-particle",
   "displayName": "UI Particle",
   "description": "This package provides a component to render particle effects for uGUI.\nThe particle rendering is maskable and sortable, without the need for an extra Camera, RenderTexture, or Canvas.",
-  "version": "4.9.1",
+  "version": "4.13.0",
   "unity": "2018.2",
   "license": "MIT",
   "repository": {