chore(release): 4.6.1 [skip ci]

## [4.6.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.6.0...v4.6.1) (2024-01-26)

### Bug Fixes

* unintended scaling occurs when `AutoScalingMode=UIParticle` and `ScalingMode=Local` ([1627de1](1627de10eb)), closes [#292](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/292)

.coffee.internal.sed

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

.editorconfig

@@ -0,0 +1,208 @@
+root = true
+
+[*.json]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.asmdef]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+# C# files
+[*.cs]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+csharp_style_implicit_object_creation_when_type_is_apparent = false
+resharper_object_creation_when_type_evident = explicitly_typed
+
+# Keep
+csharp_keep_existing_attribute_arrangement = true
+csharp_keep_existing_embedded_arrangement = true
+csharp_keep_user_linebreaks = true
+csharp_keep_existing_linebreaks = true
+csharp_place_simple_embedded_statement_on_same_line = false
+csharp_place_simple_blocks_on_single_line = false
+csharp_keep_existing_initializer_arrangement = true
+csharp_keep_existing_arrangement = true
+
+# Standard properties
+end_of_line = lf
+insert_final_newline = true
+
+# Brace preferences
+csharp_brace_style = next_line
+csharp_braces_for_ifelse = required_for_multiline_statement
+csharp_braces_for_for = required
+csharp_braces_for_foreach = required
+csharp_braces_for_while = required
+csharp_braces_for_dowhile = required
+csharp_braces_for_using = required
+csharp_case_block_braces = next_line
+csharp_initializer_braces = next_line
+
+# New line preferences
+csharp_new_line_before_open_brace = all
+csharp_new_line_before_else = true
+csharp_new_line_before_catch = true
+csharp_new_line_before_finally = true
+csharp_new_line_before_members_in_object_initializers = true
+csharp_new_line_before_members_in_anonymous_types = true
+csharp_new_line_between_query_expression_clauses = true
+
+# Indentation preferences
+csharp_indent_block_contents = true
+csharp_indent_braces = false
+csharp_indent_case_contents = true
+csharp_indent_case_contents_when_block = false
+csharp_indent_switch_labels = true
+csharp_indent_labels = one_less_than_current
+
+# Modifier preferences
+csharp_preferred_modifier_order = public,private,protected,internal,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,volatile,async:suggestion
+
+# avoid this. unless absolutely necessary
+dotnet_style_qualification_for_field = false:suggestion
+dotnet_style_qualification_for_property = false:suggestion
+dotnet_style_qualification_for_method = false:suggestion
+dotnet_style_qualification_for_event = false:suggestion
+
+# Types: use keywords instead of BCL types, and permit var only when the type is clear
+csharp_style_var_for_built_in_types = true:suggestion
+csharp_style_var_when_type_is_apparent = true:none
+csharp_style_var_elsewhere = true:suggestion
+dotnet_style_predefined_type_for_locals_parameters_members = true:suggestion
+dotnet_style_predefined_type_for_member_access = true:suggestion
+
+# Arguments
+csharp_arguments_literal = named:suggestion
+csharp_arguments_string_literal = named:suggestion
+
+# Naming: public and protected fields -> camelCase
+dotnet_naming_rule.protected_public_fields.severity = suggestion
+dotnet_naming_rule.protected_public_fields.symbols = protected_public_fields
+dotnet_naming_rule.protected_public_fields.style = camel_case
+dotnet_naming_symbols.protected_public_fields.applicable_kinds = field, event
+dotnet_naming_symbols.protected_public_fields.applicable_accessibilities = public, protected
+dotnet_naming_style.camel_case.capitalization = camel_case
+
+# Naming: properties -> camelCase
+dotnet_naming_rule.properties.severity = suggestion
+dotnet_naming_rule.properties.symbols = properties
+dotnet_naming_rule.properties.style = camel_case
+dotnet_naming_symbols.properties.applicable_kinds = property
+
+# Naming: constant fields -> k_PascalCase
+dotnet_naming_rule.constant_fields.severity = suggestion
+dotnet_naming_rule.constant_fields.symbols = constant_fields
+dotnet_naming_rule.constant_fields.style = k_pascal_case
+dotnet_naming_symbols.constant_fields.applicable_kinds = field
+dotnet_naming_symbols.constant_fields.required_modifiers = const
+dotnet_naming_style.k_pascal_case.required_prefix = k_
+dotnet_naming_style.k_pascal_case.capitalization = pascal_case
+
+# Naming: static fields -> s_PascalCase
+dotnet_naming_rule.static_fields_should_have_prefix.severity = suggestion
+dotnet_naming_rule.static_fields_should_have_prefix.symbols = static_fields
+dotnet_naming_rule.static_fields_should_have_prefix.style = s_pascal_case
+dotnet_naming_symbols.static_fields.applicable_kinds = field, property
+dotnet_naming_symbols.static_fields.required_modifiers = static
+dotnet_naming_symbols.static_fields.applicable_accessibilities = private, internal, private_protected
+dotnet_naming_style.s_pascal_case.required_prefix = s_
+dotnet_naming_style.s_pascal_case.capitalization = pascal_case
+
+# Naming: internal and private fields -> _camelCase
+dotnet_naming_rule.private_internal_fields.severity = suggestion
+dotnet_naming_rule.private_internal_fields.symbols = private_internal_fields
+dotnet_naming_rule.private_internal_fields.style = _camel_case
+dotnet_naming_symbols.private_internal_fields.applicable_kinds = field
+dotnet_naming_symbols.private_internal_fields.applicable_accessibilities = private, internal
+dotnet_naming_style._camel_case.required_prefix = _
+dotnet_naming_style._camel_case.capitalization = camel_case
+
+# Code style defaults
+dotnet_sort_system_directives_first = true
+csharp_preserve_single_line_statements = false:none
+csharp_prefer_static_local_function = true:suggestion
+csharp_prefer_simple_using_statement = false:none
+csharp_style_prefer_switch_expression = true:suggestion
+dotnet_style_readonly_field = true:suggestion
+
+# Expression-level preferences
+dotnet_style_object_initializer = true:suggestion
+dotnet_style_collection_initializer = true:suggestion
+dotnet_style_explicit_tuple_names = true:suggestion
+dotnet_style_coalesce_expression = true:suggestion
+dotnet_style_null_propagation = true:suggestion
+dotnet_style_prefer_is_null_check_over_reference_equality_method = true:suggestion
+dotnet_style_prefer_inferred_tuple_names = true:suggestion
+dotnet_style_prefer_inferred_anonymous_type_member_names = true:suggestion
+dotnet_style_prefer_auto_properties = true:suggestion
+dotnet_style_prefer_conditional_expression_over_assignment = true:silent
+dotnet_style_prefer_conditional_expression_over_return = true:silent
+csharp_prefer_simple_default_expression = true:suggestion
+
+# Expression-bodied members
+csharp_style_expression_bodied_accessors = when_on_single_line:suggestion
+csharp_style_expression_bodied_methods = false:suggestion
+csharp_style_expression_bodied_constructors = false:suggestion
+csharp_style_expression_bodied_operators = false:suggestion
+csharp_style_expression_bodied_properties = when_on_single_line:suggestion
+csharp_style_expression_bodied_indexers = false:suggestion
+csharp_style_expression_bodied_lambdas = when_on_single_line:silent
+csharp_style_expression_bodied_local_functions = false:suggestion
+
+# Pattern matching
+csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
+csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
+csharp_style_inlined_variable_declaration = true:suggestion
+
+# Null checking preferences
+csharp_style_throw_expression = true:suggestion
+csharp_style_conditional_delegate_call = true:suggestion
+
+# Other features
+csharp_style_prefer_index_operator = false:none
+csharp_style_prefer_range_operator = false:none
+csharp_style_pattern_local_over_anonymous_function = false:none
+
+# Space preferences
+csharp_space_after_cast = false
+csharp_space_after_colon_in_inheritance_clause = true
+csharp_space_after_comma = true
+csharp_space_after_dot = false
+csharp_space_after_keywords_in_control_flow_statements = true
+csharp_space_after_semicolon_in_for_statement = true
+csharp_space_around_binary_operators = before_and_after
+csharp_space_around_declaration_statements = do_not_ignore
+csharp_space_before_colon_in_inheritance_clause = true
+csharp_space_before_comma = false
+csharp_space_before_dot = false
+csharp_space_before_open_square_brackets = false
+csharp_space_before_semicolon_in_for_statement = false
+csharp_space_between_empty_square_brackets = false
+csharp_space_between_method_call_empty_parameter_list_parentheses = false
+csharp_space_between_method_call_name_and_opening_parenthesis = false
+csharp_space_between_method_call_parameter_list_parentheses = false
+csharp_space_between_method_declaration_empty_parameter_list_parentheses = false
+csharp_space_between_method_declaration_name_and_open_parenthesis = false
+csharp_space_between_method_declaration_parameter_list_parentheses = false
+csharp_space_between_parentheses = false
+csharp_space_between_square_brackets = false
+
+# ReSharper inspection severities
+resharper_check_namespace_highlighting = none
+resharper_for_can_be_converted_to_foreach_highlighting = none
+resharper_xmldoc_indent_text = ZeroIndent

.github/ISSUE_TEMPLATE/bug_report.md

@@ -26,9 +26,9 @@ A clear and concise description of what you expected to happen.
 If applicable, add screenshots to help explain your problem.
 
 **Environment (please complete the following information):**
- - Version [e.g. 4.0.0]
+ - Version [e.g. 1.0.0]
  - Platform: [e.g. Editor(Windows/Mac), Standalone(Windows/Mac), iOS, Android, WebGL]
- - Unity version: [e.g. 2022.3.0f1]
+ - Unity version: [e.g. 2018.2.8f1]
  - Build options: [e.g. IL2CPP, .Net 4.x, LWRP]
 
 **Additional context**

.github/workflows/release.yml

@@ -0,0 +1,87 @@
+name: 🔖 Release
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - preview
+      - release
+    tags-ignore:
+      - "**"
+
+jobs:
+  release:
+    name: 🔖 Release (${{ github.ref_name }})
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+      issues: write
+    outputs:
+      channel: ${{ steps.release.outputs.new_release_channel }}
+      released: ${{ steps.release.outputs.new_release_published }}
+      tag: ${{ steps.release.outputs.new_release_git_tag }}
+      version: ${{ steps.release.outputs.new_release_version }}
+      notes: ${{ steps.release.outputs.new_release_notes }}
+    steps:
+      - name: 🚚 Checkout (${{ github.ref_name }})
+        uses: actions/checkout@v4
+
+      - name: 🔖 Run semantic release
+        uses: cycjimmy/semantic-release-action@v4
+        id: release
+        with:
+          working_directory: Packages/src
+          extra_plugins: |
+            @semantic-release/changelog
+            @semantic-release/git
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+
+      - run: |
+          echo "🔖 New release published: '${{ steps.release.outputs.new_release_published }}'" | tee -a $GITHUB_STEP_SUMMARY
+          echo "🔖 New release version: '${{ steps.release.outputs.new_release_version }}'" | tee -a $GITHUB_STEP_SUMMARY
+          echo "🔖 New release channel: '${{ steps.release.outputs.new_release_channel }}'" | tee -a $GITHUB_STEP_SUMMARY
+          echo "🔖 New release git tag: '${{ steps.release.outputs.new_release_git_tag }}'" | tee -a $GITHUB_STEP_SUMMARY
+          echo '${{ steps.release.outputs.new_release_notes }}' | tee -a $GITHUB_STEP_SUMMARY
+
+  merge-to-develop:
+    if: needs.release.outputs.released == 'true'
+    needs: release
+    name: 🔀 Merge to develop
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: 🚚 Checkout (develop)
+        uses: actions/checkout@v4
+        with:
+          ref: develop
+          fetch-depth: 0
+      - name: 🔀 Merge '${{ needs.release.outputs.tag }}' into 'develop'
+        run: |
+          git config --local user.email "github-actions[bot]@users.noreply.github.com"
+          git config --local user.name "github-actions[bot]"
+          
+          git merge ${{ needs.release.outputs.tag }}
+          git push origin develop
+
+  split-to-main:
+    if: needs.release.outputs.released == 'true'
+    needs: release
+    name: 🔀 Split package
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: 🚚 Checkout (${{ needs.release.outputs.tag }})
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ needs.release.outputs.tag }}
+          fetch-depth: 0
+      - name: 🔀 Split subtree 'Packages/src' to 'main'
+        run: |
+          git branch main origin/main
+          git subtree split --prefix=Packages/src --branch main
+          git tag ${{ needs.release.outputs.version }} main
+          git push origin ${{ needs.release.outputs.version }} main:main

.github/workflows/test.yml

@@ -0,0 +1,88 @@
+# Required secrets
+#   UNITY_LICENSE: The contents of Unity license file
+name: 🧪 Test
+
+env:
+  # MINIMUM_VERSION: The minimum version of Unity.
+  MINIMUM_VERSION: 2019.4
+  EXCLUDE_FILTER: '(2020.2.0)'
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - develop
+    tags:
+      - "!*"
+    paths-ignore:
+      - "*.md"
+  pull_request:
+    types:
+      - opened
+      - synchronize
+
+jobs:
+  setup:
+    name: ⚙️ Setup
+    runs-on: ubuntu-latest
+    outputs:
+      unityVersions: ${{ steps.setup.outputs.unityVersions }}
+    steps:
+      - name: ⚙️ Find target Unity versions
+        id: setup
+        run: |
+          echo "==== Target Unity Versions ===="
+          LATEST_VERSIONS=`npx unity-changeset list --versions --latest-patch --min ${MINIMUM_VERSION} --json --all`
+          ADDITIONAL_VERSIONS=`npx unity-changeset list --versions --grep '0f' --min ${MINIMUM_VERSION} --json`
+          
+          VERSIONS=`echo "[${LATEST_VERSIONS}, ${ADDITIONAL_VERSIONS}]" \
+            | jq -c '[ flatten | sort | unique | .[] | select( test("${{ env.EXCLUDE_FILTER }}") | not ) ]'`
+          echo "unityVersions=${VERSIONS}" | tee $GITHUB_OUTPUT
+
+  test:
+    name: 🧪 Run tests
+    runs-on: ubuntu-latest
+    permissions:
+      checks: write
+      contents: read
+    needs: setup
+    strategy:
+      fail-fast: false
+      matrix:
+        unityVersion: ${{ fromJson(needs.setup.outputs.unityVersions) }}
+    steps:
+      - name: 🚚 Checkout
+        uses: actions/checkout@v4
+
+      - name: 📥 Cache library
+        uses: actions/cache@v3
+        with:
+          path: Library
+          key: Library-${{ matrix.unityVersion }}-${{ github.sha }}
+          restore-keys: |
+            Library-${{ matrix.unityVersion }}-
+            Library-
+
+      - name: 🛠️ Build Unity Project
+        uses: game-ci/unity-builder@v3
+        timeout-minutes: 30
+        env:
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+        with:
+          customImage: ghcr.io/mob-sakai/unity3d:${{ matrix.unityVersion }}
+          targetPlatform: StandaloneLinux64
+          allowDirtyBuild: true
+          customParameters: -nographics
+
+      - name: 🧪 Run tests
+        uses: game-ci/unity-test-runner@v3
+        timeout-minutes: 30
+        env:
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+        with:
+          customImage: ghcr.io/mob-sakai/unity3d:${{ matrix.unityVersion }}
+          # unityVersion: ${{ matrix.unityVersion }}
+          customParameters: -nographics
+          checkName: ${{ matrix.unityVersion }} Test Results
+          githubToken: ${{ github.token }}
+          coverageOptions: "dontClear;generateHtmlReport;generateBadgeReport;pathFilters:+**/Packages/src/**;assemblyFilters:+<packages>,-*.Editor,-*.Test"

.gitignore

@@ -0,0 +1,30 @@
+# Windows
+Thumbs.db
+Desktop.ini
+/*.csproj
+/*.sln
+
+# macOS
+.DS_Store
+
+# Vim
+*.swp
+
+# Unity
+/Logs
+/Library
+/Temp
+Assets/Plugins.meta
+Assets/JMO Assets.meta
+Assets/JMO Assets
+Assets/EffectExamples/
+Assets/EffectExamples.meta
+Assets/Plugins/
+
+# VS
+.vs/
+.vscode/
+.idea/
+obj/
+bin/
+UserSettings/

Assets/Demo.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 8cf8018dee45a4c42a19eec890eaa5b1
+guid: 7c9f7735cc2f24a7ca1c23043e63a6be
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}

Assets/Demo/Cartoon FX & War FX Demo.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 1b2877595f27c4a70a426991d515434f
+guid: 15e5409f0334e479e91e672ae14567d3
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}

Assets/Demo/Cartoon FX & War FX Demo/CFX Free Demo.unity.meta

@@ -0,0 +1,4 @@
+fileFormatVersion: 2
+guid: 064daa6b97d6846ec9334e98d642f081
+DefaultImporter:
+  userData: 

Assets/Demo/Cartoon FX & War FX Demo/CFX_Demo_With_UIParticle.asmdef

@@ -0,0 +1,14 @@
+{
+    "name": "Coffee.CFX_Demo_With_UIParticle",
+    "references": [
+        "Coffee.UIParticle"
+    ],
+    "optionalUnityReferences": [],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": []
+}

Assets/Demo/Cartoon FX & War FX Demo/CFX_Demo_With_UIParticle.asmdef.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 67b89587ad4f645e18aa12053a6cc9b7
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Demo/Cartoon FX & War FX Demo/CFX_Demo_With_UIParticle.cs

@@ -0,0 +1,115 @@
+using System;
+using System.Linq;
+using System.Reflection;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+using UnityEngine.UI;
+using Object = UnityEngine.Object;
+
+namespace Coffee.UIExtensions.Demo
+{
+    public class CFX_Demo_With_UIParticle : MonoBehaviour
+    {
+        private MonoBehaviour _demo;
+        private Toggle _spawnOnUI;
+        private UIParticle _uiParticle;
+        private string _demoType;
+
+        // Start is called before the first frame update
+        private void Start()
+        {
+            _uiParticle = GetComponentInChildren<UIParticle>();
+            _spawnOnUI = GetComponentInChildren<Toggle>();
+            _demo = FindObjectOfType("CFX_Demo_New") as MonoBehaviour
+                    ?? FindObjectOfType("WFX_Demo_New") as MonoBehaviour
+                    ?? FindObjectOfType("CFXR_Demo") as MonoBehaviour;
+            _demoType = _demo?.GetType().Name;
+
+            SetCanvasWidth(800);
+            SetCanvasRenderOverlay(true);
+        }
+
+        // Update is called once per frame
+        private void Update()
+        {
+            if (!_spawnOnUI.isOn || !_demo || !Input.GetMouseButtonDown(0)) return;
+
+            if (_demoType == "CFX_Demo_New" || _demoType == "WFX_Demo_New")
+            {
+                SpawnParticleCFX();
+            }
+            else if (_demoType == "CFXR_Demo")
+            {
+                SpawnParticleCFXR();
+            }
+        }
+
+        private void SpawnParticleCFXR()
+        {
+            var particle = _demo.GetType()
+                .GetField("currentEffect", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public)
+                ?.GetValue(_demo) as GameObject;
+            if (!particle) return;
+
+            var instance = Instantiate(particle);
+            foreach (var c in instance.GetComponentsInChildren<MonoBehaviour>())
+            {
+                if (c.GetType().Name == "CFXR_Effect")
+                {
+                    c.enabled = false;
+                }
+            }
+            _uiParticle.SetParticleSystemInstance(instance, true);
+        }
+
+        private void SpawnParticleCFX()
+        {
+            var particle = _demo.GetType()
+                .GetMethod("spawnParticle", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public)
+                ?.Invoke(_demo, Array.Empty<object>()) as GameObject;
+            if (!particle) return;
+
+            particle.transform.localScale = Vector3.one;
+            _uiParticle.SetParticleSystemInstance(particle, true);
+        }
+
+        private static Object FindObjectOfType(string typeName)
+        {
+            var type = AppDomain.CurrentDomain.GetAssemblies()
+                .SelectMany(x => x.GetTypes())
+                .FirstOrDefault(x => x.Name == typeName);
+
+            return type == null ? null : FindObjectOfType(type);
+        }
+
+        public void SetCanvasWidth(int width)
+        {
+            var scaler = GetComponentInParent<CanvasScaler>();
+            scaler.screenMatchMode = CanvasScaler.ScreenMatchMode.MatchWidthOrHeight;
+            scaler.matchWidthOrHeight = 0;
+            var resolution = scaler.referenceResolution;
+            resolution.x = width;
+            scaler.referenceResolution = resolution;
+        }
+
+        public void SetCanvasRenderOverlay(bool enable)
+        {
+            var canvas = GetComponentInParent<Canvas>();
+            if (enable)
+            {
+                canvas.renderMode = RenderMode.ScreenSpaceOverlay;
+            }
+            else
+            {
+                canvas.worldCamera = Camera.main;
+                canvas.renderMode = RenderMode.ScreenSpaceCamera;
+                canvas.planeDistance = 5;
+            }
+        }
+
+        public void LoadScene(string scene)
+        {
+            SceneManager.LoadScene(scene);
+        }
+    }
+}

Assets/Demo/Cartoon FX & War FX Demo/CFX_Demo_With_UIParticle.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 8455ee485a5ee4cacbdf558f66af65fb
+guid: a845100b226da488ab9037ad254b5860
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Assets/Demo/Cartoon FX & War FX Demo/ParticleEffectForUGUI.prefab.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 3432d66abba624d4fad1150154199656
+PrefabImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Demo/Cartoon FX & War FX Demo/README.md

@@ -0,0 +1,4 @@
+Cartoon FX & War FX Demo
+===
+
+Please import assets "Cartoon FX Free" and/or "War FX Free" from Unity asset store.

Assets/Demo/Cartoon FX & War FX Demo/README.md.meta

@@ -0,0 +1,7 @@
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+        "Coffee.UIParticle"
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+using UnityEngine;
+using UnityEngine.Serialization;
+
+namespace Coffee.UIExtensions.Demo
+{
+    public class UIParticle_PerformanceDemo : MonoBehaviour
+    {
+        [FormerlySerializedAs("copyOrigin")]
+        [SerializeField]
+        private GameObject m_CopyOrigin;
+
+        [FormerlySerializedAs("copyCount")]
+        [SerializeField]
+        public int m_CopyCount;
+
+        [FormerlySerializedAs("root")]
+        [SerializeField]
+        public Canvas m_RootCanvas;
+
+        private void Start()
+        {
+            Application.targetFrameRate = 60;
+
+            if (m_CopyOrigin)
+            {
+                m_CopyOrigin.SetActive(false);
+
+                var parent = m_CopyOrigin.transform.parent;
+                for (var i = 0; i < m_CopyCount; i++)
+                {
+                    var go = Instantiate(m_CopyOrigin, parent, false);
+                    go.name = string.Format("{0} {1}", m_CopyOrigin.name, i + 1);
+                    go.hideFlags = HideFlags.DontSave;
+
+                    go.SetActive(true);
+                }
+            }
+        }
+
+        public void UIParticle_Enable(bool flag)
+        {
+            foreach (var uip in m_RootCanvas.GetComponentsInChildren<UIParticle>(true))
+            {
+                uip.enabled = flag;
+            }
+
+            if (!flag)
+            {
+                foreach (var ps in FindObjectsOfType<ParticleSystem>())
+                {
+                    ps.Play(false);
+                }
+            }
+        }
+
+        public void UIParticle_MeshSharing(bool flag)
+        {
+            foreach (var uip in m_RootCanvas.GetComponentsInChildren<UIParticle>(true))
+            {
+                uip.meshSharing = flag
+                    ? UIParticle.MeshSharing.Auto
+                    : UIParticle.MeshSharing.None;
+            }
+        }
+
+        public void UIParticle_RandomGroup(bool flag)
+        {
+            foreach (var uip in m_RootCanvas.GetComponentsInChildren<UIParticle>(true))
+            {
+                uip.groupMaxId = flag
+                    ? 4
+                    : 0;
+            }
+        }
+
+        public void ParticleSystem_SetScale(float scale)
+        {
+            foreach (var ps in FindObjectsOfType<ParticleSystem>())
+            {
+                ps.transform.localScale = new Vector3(scale, scale, scale);
+            }
+        }
+    }
+}

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Assets/Samples

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Assets/Tests/Coffee.UIParticle.Tests.asmdef

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+{
+    "name": "Coffee.UIParticle.Tests",
+    "references": [
+        "Coffee.UIParticle"
+    ],
+    "optionalUnityReferences": [
+        "TestAssemblies"
+    ],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": false,
+    "defineConstraints": []
+}

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Assets/Tests/Editor/Coffee.UIParticle.Editor.Tests.asmdef

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+{
+    "name": "Coffee.UIParticle.Editor.Tests",
+    "references": [
+        "Coffee.UIParticle",
+        "Coffee.UIParticle.Editor"
+    ],
+    "optionalUnityReferences": [
+        "TestAssemblies"
+    ],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
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Assets/Tests/Editor/NewTestScript.cs

@@ -0,0 +1,26 @@
+using System.Collections;
+using NUnit.Framework;
+using UnityEngine.TestTools;
+
+namespace Coffee.UIParticle.Editor.Tests
+{
+    public class NewTestScript
+    {
+        // A Test behaves as an ordinary method
+        [Test]
+        public void NewTestScriptSimplePasses()
+        {
+            // Use the Assert class to test conditions
+        }
+
+        // A UnityTest behaves like a coroutine in Play Mode. In Edit Mode you can use
+        // `yield return null;` to skip a frame.
+        [UnityTest]
+        public IEnumerator NewTestScriptWithEnumeratorPasses()
+        {
+            // Use the Assert class to test conditions.
+            // Use yield to skip a frame.
+            yield return null;
+        }
+    }
+}

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Assets/Tests/NewTestScript.cs

@@ -0,0 +1,26 @@
+using System.Collections;
+using NUnit.Framework;
+using UnityEngine.TestTools;
+
+namespace Coffee.UIParticle.Tests
+{
+    public class NewTestScript
+    {
+        // A Test behaves as an ordinary method
+        [Test]
+        public void NewTestScriptSimplePasses()
+        {
+            // Use the Assert class to test conditions
+        }
+
+        // A UnityTest behaves like a coroutine in Play Mode. In Edit Mode you can use
+        // `yield return null;` to skip a frame.
+        [UnityTest]
+        public IEnumerator NewTestScriptWithEnumeratorPasses()
+        {
+            // Use the Assert class to test conditions.
+            // Use yield to skip a frame.
+            yield return null;
+        }
+    }
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CONTRIBUTING.md

@@ -1,43 +0,0 @@
-# Contributing
-
-## How to Contribute
-
-#### Code of Conduct
-
-This repository has adopted the Contributor Covenant as it's
-Code of Conduct. It is expected that participants adhere to it.
-
-#### Proposing a Change
-
-If you are unsure about whether or not a change is desired,
-you can create an issue. This is useful because it creates
-the possibility for a discussion that's visible to everyone.
-
-When fixing a bug it is fine to submit a pull request right away.
-
-#### Sending a Pull Request
-
-Steps to be performed to submit a pull request:
-
-1. Fork the repository.
-2. Clone the repository.
-3. Checkout `develop` branch.
-4. Develop the package.
-5. Test the package with the test runner (`Window > Generals > Test Runner`).
-6. Commit with a message based
-   on [Angular Commit Message Conventions](https://gist.github.com/stephenparish/9941e89d80e2bc58a153) as follows:
-
-    - `fix:` fix a bug
-    - `feat:` new feature
-    - `docs:` changes only in documentation
-    - `style:` changes only in formatting, white-space, etc
-    - `refactor:` changes only in code structure (extract method, rename variable, move method, etc)
-    - `perf:` changes only in code performance
-    - `test:` add or update tests
-    - `chore:` changes to the build process or auxiliary tools and libraries such as documentation generation
-
-7. Create a pull request on GitHub. Fill out the description, link any related issues and submit your pull request.
-
-#### License
-
-By contributing to this repository, you agree that your contributions will be licensed under its MIT license.

Packages/manifest.json

@@ -0,0 +1,8 @@
+{
+  "dependencies": {
+    "com.unity.ide.rider": "3.0.27",
+    "com.unity.test-framework": "1.1.33",
+    "com.unity.modules.animation": "1.0.0",
+    "com.unity.modules.physics": "1.0.0"
+  }
+}

Packages/packages-lock.json

@@ -0,0 +1,85 @@
+{
+  "dependencies": {
+    "com.coffee.ui-particle": {
+      "version": "file:src",
+      "depth": 0,
+      "source": "embedded",
+      "dependencies": {
+        "com.unity.ugui": "1.0.0",
+        "com.unity.modules.particlesystem": "1.0.0"
+      }
+    },
+    "com.unity.ext.nunit": {
+      "version": "1.0.6",
+      "depth": 1,
+      "source": "registry",
+      "dependencies": {},
+      "url": "https://packages.unity.com"
+    },
+    "com.unity.ide.rider": {
+      "version": "3.0.27",
+      "depth": 0,
+      "source": "registry",
+      "dependencies": {
+        "com.unity.ext.nunit": "1.0.6"
+      },
+      "url": "https://packages.unity.com"
+    },
+    "com.unity.test-framework": {
+      "version": "1.1.33",
+      "depth": 0,
+      "source": "registry",
+      "dependencies": {
+        "com.unity.ext.nunit": "1.0.6",
+        "com.unity.modules.imgui": "1.0.0",
+        "com.unity.modules.jsonserialize": "1.0.0"
+      },
+      "url": "https://packages.unity.com"
+    },
+    "com.unity.ugui": {
+      "version": "1.0.0",
+      "depth": 1,
+      "source": "builtin",
+      "dependencies": {
+        "com.unity.modules.ui": "1.0.0",
+        "com.unity.modules.imgui": "1.0.0"
+      }
+    },
+    "com.unity.modules.animation": {
+      "version": "1.0.0",
+      "depth": 0,
+      "source": "builtin",
+      "dependencies": {}
+    },
+    "com.unity.modules.imgui": {
+      "version": "1.0.0",
+      "depth": 1,
+      "source": "builtin",
+      "dependencies": {}
+    },
+    "com.unity.modules.jsonserialize": {
+      "version": "1.0.0",
+      "depth": 1,
+      "source": "builtin",
+      "dependencies": {}
+    },
+    "com.unity.modules.particlesystem": {
+      "version": "1.0.0",
+      "depth": 1,
+      "source": "builtin",
+      "dependencies": {}
+    },
+    "com.unity.modules.physics": {
+      "version": "1.0.0",
+      "depth": 0,
+      "source": "builtin",
+      "dependencies": {}
+    },
+    "com.unity.modules.ui": {
+      "version": "1.0.0",
+      "depth": 2,
+      "source": "builtin",
+      "dependencies": {}
+    }
+  }
+}

Packages/src/.releaserc.json

@@ -1,10 +1,9 @@
 {
   "branches": [
     "release",
-    "release-4.x",
     {
-      "name": "release-preview",
-      "prerelease": "preview"
+      "name": "preview",
+      "prerelease": true
     }
   ],
   "plugins": [

Packages/src/CHANGELOG.md

@@ -1,156 +1,3 @@
-# [5.0.0-preview.11](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v5.0.0-preview.10...v5.0.0-preview.11) (2024-09-29)
-
-
-### Features
-
-* change the default value of `UIParticle.scale` from `10` to `1` ([4e188dd](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/4e188dd39ee32dd1339066a6946e43ba3580c324))
-* UIParticle no longer inherits from MaskableGraphic ([52eb28c](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/52eb28cdafe7c9009d5a4b76978e002798440e8d))
-
-
-### BREAKING CHANGES
-
-* Some members inherited from MaskableGraphic will no longer be available.
-
-## [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)
-
-
-### Bug Fixes
-
-* ParticleSystem trails gain offset on parent canvas change ([2a1cd50](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/2a1cd502b452b5b56edf8bcfe91adf99d1bb5147)), closes [#323](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/323)
-
-# [4.9.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.8.1...v4.9.0) (2024-07-18)
-
-
-### Features
-
-* ParticleAttractor supports multiple ParticleSystems ([3834780](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/3834780fdb43443fe6e1ef89df54d26a24d62a91))
-
-## [4.8.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.8.0...v4.8.1) (2024-06-27)
-
-
-### Bug Fixes
-
-* remove debug code ([669deb4](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/669deb41d4ac589d9db93b29bc8e95383e7f28a5))
-
-# [4.8.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.7.2...v4.8.0) (2024-06-27)
-
-
-### Bug Fixes
-
-* generated baking-camera object remains in the prefab or scene (again) ([de35cba](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/de35cba34c6312c1405ed522e9927c620c78e72d))
-* SetParticleSystemInstance/Prefab APIs destroy generated objects ([ae3f3a8](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/ae3f3a8e62cc733420354d237ab765ac777127c8))
-
-
-### Features
-
-* add 'custom view' option. ([a703c29](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/a703c2921ca08c2280d0c8fde01e4c0b33b5c69e))
-* remove overlay window (editor) ([8358170](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/835817049f4fcf00dd2bf98dbada14f041ad3544))
-* restore `Transform.localScale` when setting `autoScalingMode` to something other than `Transform` (again) ([88a970d](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/88a970d93a2b69cf011d86bd1807569e90538e0e))
-* the rendering order list in inspector is now more compact ([be90172](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/be901724e064befacf617f4940b0331e1d31e1ca))
-
-## [4.7.2](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.7.1...v4.7.2) (2024-06-21)
-
-
-### Bug Fixes
-
-* generated baking-camera object remains in the prefab or scene ([0bb8438](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/0bb843830197d8c1252232928becc211c0ada08d))
-
-## [4.7.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.7.0...v4.7.1) (2024-06-20)
-
-
-### Bug Fixes
-
-* despite not using the size module, particles become smaller based on their z position ([a8ed6e6](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/a8ed6e68584e1d9e45ed852eefcc03979ea7e0e1)), closes [#316](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/316)
-
-# [4.7.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.6.8...v4.7.0) (2024-06-19)
-
-
-### Bug Fixes
-
-* `UIParticle.transform.localScale` does not scale particles ([1d40e24](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/1d40e24c742741e97f03c55468ccb1e505341133)), closes [#313](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/313)
-* UIParticle is scaled by canvas size even when `AutoScalingMode.None` and `ScalingMode.Local` ([54a4b1c](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/54a4b1cdfd06400c7be89c1ee704bb42a659c7c2)), closes [#313](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/313)
-* UIParticle is scaled incorrectly with nested canvases ([f26920f](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/f26920f9825547222a4afbb31cc5dc5a002c3e9b)), closes [#313](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/313)
-
-
-### Features
-
-* reset previous position on start play for world space simulation ([3880484](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/3880484ce5190c42fc79c81d0b69e3fbeda09dd0)), closes [#303](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/303)
-* restore `Transform.localScale` when setting `autoScalingMode` to something other than `Transform` ([5505247](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/5505247a94a929ff89635fde512a9b95691e0043))
-
-## [4.6.8](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.6.7...v4.6.8) (2024-06-14)
-
-
-### Bug Fixes
-
-* 'Resource ID out of range in GetResource' error in overlay rendering mode ([05286ce](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/05286cedfd17b1a0cb90a5e918513644f47cd831)), closes [#308](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/308)
-
-## [4.6.7](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.6.6...v4.6.7) (2024-05-24)
-
-
-### Bug Fixes
-
-* the ParticleSystem's localPosition drifts at certain scales due to floating-point precision issues ([e924eb4](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/e924eb45968a112347471cabaeabc274e4c37ce4)), closes [#299](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/299) [#312](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/312)
-
-## [4.6.6](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.6.5...v4.6.6) (2024-05-23)
-
-
-### Bug Fixes
-
-* fix release workflow ([30b0076](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/30b00762f6da166c043587798b1552f27b4cc604))
-
-## [4.6.5](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.6.4...v4.6.5) (2024-05-23)
-
-
-### Bug Fixes
-
-* update workflows (for preview and v4) ([3eab097](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/3eab0979b9b85919b804442ab05735b7120eade5))
-
-## [4.6.4](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.6.3...v4.6.4) (2024-05-22)
-
-
-### Bug Fixes
-
-* assertion failed on expression: 'ps->array_size()' ([1b5c359](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/1b5c359058289895caf5f245fe09abb643bc38eb)), closes [#278](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/278)
-* lost Material.mainTexture when using AnimatableProperties ([ea04352](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/ea043524c0b00f67cba26a1f9ea537ee4a56d6ff)), closes [#311](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/311)
-* remove unnecessary code ([c37c014](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/c37c01486499773e3d7e8296c95bb4c3fae94abb))
-
-## [4.6.3](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.6.2...v4.6.3) (2024-04-04)
-
-
-### Bug Fixes
-
-* if only Trail Material is used, it will not be displayed ([2eff411](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/2eff411bd97eb4e6947d29a02b85b414bfdaee3a)), closes [#294](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/294)
-* if the UIParticle parents do not have Canvas, an exception is thrown in OnEnable ([e82c833](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/e82c833d04b819f103984931ba29a3616ef50908)), closes [#300](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/300)
-* particle size too small due to auto scaling ([2ec3748](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/2ec374833614d64406e7c3207ca5fe234a749dcb)), closes [#295](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/295)
-
-## [4.6.2](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.6.1...v4.6.2) (2024-02-01)
-
-
-### Bug Fixes
-
-* fix compile error in Unity 2021.1 or older ([fcae60b](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/fcae60bf29079bac07463bd3a86f8644151d72ba))
-* fix demos ([ad20d12](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/ad20d128a2ad033d9f30b98f0a0dab6091f5aa19))
-* fix warning ([7fd4a8e](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/7fd4a8e343ce587dffa9db5ff186061b3ebb38a6))
-
 ## [4.6.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.6.0...v4.6.1) (2024-01-26)
 
 

Packages/src/CONTRIBUTING.md

@@ -0,0 +1,30 @@
+# Contributing
+
+## How to Contribute
+
+#### Code of Conduct
+
+This repository has adopted the Contributor Covenant as it's
+Code of Conduct. It is expected that participants adhere to it.
+
+#### Proposing a Change
+
+If you are unsure about whether or not a change is desired,
+you can create an issue. This is useful because it creates
+the possibility for a discussion that's visible to everyone.
+
+When fixing a bug it is fine to submit a pull request right away.
+
+#### Sending a Pull Request
+
+Steps to be performed to submit a pull request:
+
+1. Fork the repository and create your branch from `develop`.
+2. If you have fixed a bug or added code that should be tested, add tests.
+3. Click `Window > Generals > Test Runner` to test
+4. Commit with a massage based on [Angular Commit Message Conventions](https://gist.github.com/stephenparish/9941e89d80e2bc58a153).
+5. Fill out the description, link any related issues and submit your pull request.
+
+#### License
+
+By contributing to this repository, you agree that your contributions will be licensed under its MIT license.

Packages/src/Editor/AnimatablePropertyEditor.cs

@@ -31,35 +31,35 @@ namespace Coffee.UIExtensions
             }
             else
             {
-                result.Aggregate(s_Sb, (a, b) =>
-                {
-                    s_Sb.Append(b);
-                    return s_Sb.Append(", ");
-                });
+                result.Aggregate(s_Sb, (a, b) => s_Sb.AppendFormat("{0}, ", b));
                 s_Sb.Length -= 2;
             }
 
             return s_Sb.ToString();
         }
 
-        public static void Draw(SerializedProperty sp, List<Material> mats)
+        public static void Draw(SerializedProperty sp, Material[] mats)
         {
-            var pos = EditorGUILayout.GetControlRect(true);
-            var label = new GUIContent(sp.displayName, sp.tooltip);
-            var rect = EditorGUI.PrefixLabel(pos, label);
-            var text = sp.hasMultipleDifferentValues
-                ? "-"
-                : CollectActiveNames(sp, s_ActiveNames);
+            bool isClicked;
+            using (new EditorGUILayout.HorizontalScope(GUILayout.ExpandWidth(false)))
+            {
+                var pos = EditorGUILayout.GetControlRect(true);
+                var label = new GUIContent(sp.displayName, sp.tooltip);
+                var rect = EditorGUI.PrefixLabel(pos, label);
+                var text = sp.hasMultipleDifferentValues
+                    ? "-"
+                    : CollectActiveNames(sp, s_ActiveNames);
+                isClicked = GUI.Button(rect, text, EditorStyles.popup);
+            }
 
-            if (!GUI.Button(rect, text, EditorStyles.popup)) return;
+            if (!isClicked) return;
 
             var gm = new GenericMenu();
-            gm.AddItem(s_ContentNothing, s_ActiveNames.Count == 0, x =>
+            gm.AddItem(s_ContentNothing, s_ActiveNames.Count == 0, () =>
             {
-                var current = (SerializedProperty)x;
-                current.ClearArray();
-                current.serializedObject.ApplyModifiedProperties();
-            }, sp);
+                sp.ClearArray();
+                sp.serializedObject.ApplyModifiedProperties();
+            });
 
             if (!sp.hasMultipleDifferentValues)
             {
@@ -73,7 +73,7 @@ namespace Coffee.UIExtensions
             }
 
             s_Names.Clear();
-            for (var j = 0; j < mats.Count; j++)
+            for (var j = 0; j < mats.Length; j++)
             {
                 var mat = mats[j];
                 if (!mat || !mat.shader) continue;
@@ -82,7 +82,8 @@ namespace Coffee.UIExtensions
                 {
                     var name = ShaderUtil.GetPropertyName(mat.shader, i);
                     var type = (AnimatableProperty.ShaderPropertyType)ShaderUtil.GetPropertyType(mat.shader, i);
-                    if (!s_Names.Add(name)) continue;
+                    if (s_Names.Contains(name)) continue;
+                    s_Names.Add(name);
 
                     AddMenu(gm, sp, new ShaderProperty(name, type), true);
 

Packages/src/Editor/ImportSampleMenu.cs

@@ -0,0 +1,102 @@
+#if !UNITY_2019_1_OR_NEWER
+using System.IO;
+using System.Linq;
+using System.Text.RegularExpressions;
+using UnityEditor;
+
+namespace Coffee.UIExtensions
+{
+    internal static class ImportSampleMenu_UIParticle
+    {
+        private const string k_DisplayName = "UI Particle";
+        private const string k_JsonGuid = "823dc693d087a4b559c7e1547274cc7d";
+
+        [MenuItem("Assets/Samples/" + k_DisplayName + "/Demo")]
+        private static void ImportSample()
+        {
+            ImportSample(k_JsonGuid, "Demo");
+        }
+
+        [MenuItem("Assets/Samples/" + k_DisplayName + "/Cartoon FX & War FX Demo")]
+        private static void ImportSample_CFX()
+        {
+            ImportSample(k_JsonGuid, "Cartoon FX & War FX Demo");
+        }
+
+        [MenuItem("Assets/Samples/" + k_DisplayName + "/Cartoon FX & War FX Demo")]
+        private static void ImportSample_PerformanceDemo()
+        {
+            ImportSample(k_JsonGuid, "Performance Demo");
+        }
+
+        private static void ImportSample(string jsonGuid, string sampleName)
+        {
+            var jsonPath = AssetDatabase.GUIDToAssetPath(jsonGuid);
+            if (string.IsNullOrEmpty(jsonPath)) return;
+
+            var jsonDir = Path.GetDirectoryName(jsonPath);
+            if (string.IsNullOrEmpty(jsonDir)) return;
+
+            var packageRoot = jsonDir.Replace('\\', '/');
+            var json = File.ReadAllText(jsonPath);
+            var version = Regex.Match(json, "\"version\"\\s*:\\s*\"([^\"]+)\"").Groups[1].Value;
+            var src = $"{packageRoot}/Samples~/{sampleName}";
+            var dst = $"Assets/Samples/{k_DisplayName}/{version}/{sampleName}";
+            var previousPath = GetPreviousSamplePath(k_DisplayName, sampleName);
+
+            // Remove the previous sample directory.
+            if (!string.IsNullOrEmpty(previousPath))
+            {
+                var msg = "A different version of the sample is already imported at\n\n"
+                          + previousPath
+                          + "\n\nIt will be deleted when you update. Are you sure you want to continue?";
+                if (!EditorUtility.DisplayDialog("Sample Importer", msg, "OK", "Cancel"))
+                {
+                    return;
+                }
+
+                FileUtil.DeleteFileOrDirectory(previousPath);
+
+                var metaFile = previousPath + ".meta";
+                if (File.Exists(metaFile))
+                {
+                    FileUtil.DeleteFileOrDirectory(metaFile);
+                }
+            }
+
+            if (!Directory.Exists(dst))
+            {
+                FileUtil.DeleteFileOrDirectory(dst);
+            }
+
+            var dstDir = Path.GetDirectoryName(dst);
+            if (!string.IsNullOrEmpty(dstDir) && !Directory.Exists(dstDir))
+            {
+                Directory.CreateDirectory(dstDir);
+            }
+
+            if (Directory.Exists(src))
+            {
+                FileUtil.CopyFileOrDirectory(src, dst);
+            }
+            else
+            {
+                throw new DirectoryNotFoundException(src);
+            }
+
+            AssetDatabase.Refresh(ImportAssetOptions.ImportRecursive);
+        }
+
+        private static string GetPreviousSamplePath(string displayName, string sampleName)
+        {
+            var sampleRoot = $"Assets/Samples/{displayName}";
+            var sampleRootInfo = new DirectoryInfo(sampleRoot);
+            if (!sampleRootInfo.Exists) return null;
+
+            return sampleRootInfo.GetDirectories()
+                .Select(versionDir => Path.Combine(versionDir.ToString(), sampleName))
+                .FirstOrDefault(Directory.Exists);
+        }
+    }
+}
+#endif

Packages/src/Editor/ImportSampleMenu.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 07047cbd3c4af489fbd41f4303a26fe2
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/src/Editor/UIParticleEditor.cs

@@ -2,21 +2,17 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.RegularExpressions;
 using UnityEditor;
+using UnityEditor.UI;
 using UnityEditorInternal;
 using UnityEngine;
-using UnityEngine.Profiling;
 using UnityEngine.UI;
-using Coffee.UIParticleInternal;
 #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
@@ -25,26 +21,43 @@ namespace Coffee.UIExtensions
 {
     [CustomEditor(typeof(UIParticle))]
     [CanEditMultipleObjects]
-    internal class UIParticleEditor : Editor
+    internal class UIParticleEditor : GraphicEditor
     {
+#if UNITY_2021_2_OR_NEWER
+#if UNITY_2022_1_OR_NEWER
+        [Overlay(typeof(SceneView), "Scene View/UI Particles", "UI Particles", true,
+            defaultDockPosition = DockPosition.Bottom,
+            defaultDockZone = DockZone.Floating,
+            defaultLayout = Layout.Panel)]
+#else
+        [Overlay(typeof(SceneView), "Scene View/UI Particles", "UI Particles", true)]
+#endif
+        private class UIParticleOverlay : IMGUIOverlay, ITransientOverlay
+        {
+            public bool visible => s_SerializedObject != null;
+
+            public override void OnGUI()
+            {
+                if (visible)
+                {
+                    WindowFunction();
+                }
+            }
+        }
+#endif
+
         //################################
         // Constant or Static Members.
         //################################
-        private static readonly GUIContent[] s_ContentMaterials = new[]
-        {
-            new GUIContent("Material"),
-            new GUIContent("Trail Material")
-        };
-
         private static readonly GUIContent s_ContentRenderingOrder = new GUIContent("Rendering Order");
         private static readonly GUIContent s_ContentRefresh = new GUIContent("Refresh");
         private static readonly GUIContent s_ContentFix = new GUIContent("Fix");
+        private static readonly GUIContent s_ContentMaterial = new GUIContent("Material");
+        private static readonly GUIContent s_ContentTrailMaterial = new GUIContent("Trail Material");
         private static readonly GUIContent s_Content3D = new GUIContent("3D");
         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 Regex s_RegexBuiltInGuid = new Regex(@"^0{16}.0{15}$", RegexOptions.Compiled);
-        private static readonly List<Material> s_TempMaterials = new List<Material>();
+        private static SerializedObject s_SerializedObject;
         private static bool s_XYZMode;
 
         private SerializedProperty _maskable;
@@ -55,8 +68,6 @@ namespace Coffee.UIExtensions
         private SerializedProperty _groupMaxId;
         private SerializedProperty _positionMode;
         private SerializedProperty _autoScalingMode;
-        private SerializedProperty _useCustomView;
-        private SerializedProperty _customViewSize;
         private ReorderableList _ro;
         private bool _showMax;
 
@@ -74,14 +85,66 @@ namespace Coffee.UIExtensions
             "_ColorMask"
         };
 
+        [InitializeOnLoadMethod]
+        private static void Init()
+        {
+#if !UNITY_2021_2_OR_NEWER
+            var miSceneViewOverlayWindow = Type.GetType("UnityEditor.SceneViewOverlay, UnityEditor")
+                ?.GetMethods(BindingFlags.Public | BindingFlags.Static)
+                .First(x => x.Name == "Window" && 5 <= x.GetParameters().Length);
+            var windowFunction = (Action<Object, SceneView>)WindowFunction;
+            var windowFunctionType = Type.GetType("UnityEditor.SceneViewOverlay+WindowFunction, UnityEditor");
+            var windowFunctionDelegate = Delegate.CreateDelegate(windowFunctionType, windowFunction.Method);
+            var windowTitle = new GUIContent(ObjectNames.NicifyVariableName(nameof(UIParticle)));
+#if UNITY_2019_2_OR_NEWER
+            //public static void Window(GUIContent title, WindowFunction sceneViewFunc, int order, Object target, WindowDisplayOption option, EditorWindow window = null)
+            var sceneViewArgs = new object[] { windowTitle, windowFunctionDelegate, 599, null, 2, null };
+#else
+            //public static void Window(GUIContent title, WindowFunction sceneViewFunc, int order, Object target, WindowDisplayOption option)
+            var sceneViewArgs = new object[] { windowTitle, windowFunctionDelegate, 599, null, 2 };
+#endif
+
+#if UNITY_2019_1_OR_NEWER
+            SceneView.duringSceneGui += _ =>
+#else
+            SceneView.onSceneGUIDelegate += _ =>
+#endif
+            {
+                if (s_SerializedObject != null)
+                {
+                    miSceneViewOverlayWindow.Invoke(null, sceneViewArgs);
+                }
+            };
+#endif
+
+            SerializedObject CreateSerializeObject()
+            {
+                var uiParticles = Selection.gameObjects.Select(x => x.GetComponent<ParticleSystem>())
+                    .Where(x => x)
+                    .Select(x => x.GetComponentInParent<UIParticle>(true))
+                    .Where(x => x && x.canvas)
+                    .Concat(Selection.gameObjects.Select(x => x.GetComponent<UIParticle>())
+                        .Where(x => x && x.canvas))
+                    .Distinct()
+                    .OfType<Object>()
+                    .ToArray();
+                return 0 < uiParticles.Length ? new SerializedObject(uiParticles) : null;
+            }
+
+            s_SerializedObject = CreateSerializeObject();
+            Selection.selectionChanged += () => s_SerializedObject = CreateSerializeObject();
+        }
+
         //################################
         // Public/Protected Members.
         //################################
         /// <summary>
         /// This function is called when the object becomes enabled and active.
         /// </summary>
-        private void OnEnable()
+        protected override void OnEnable()
         {
+            base.OnEnable();
+
             _maskable = serializedObject.FindProperty("m_Maskable");
             _scale3D = serializedObject.FindProperty("m_Scale3D");
             _animatableProperties = serializedObject.FindProperty("m_AnimatableProperties");
@@ -90,43 +153,31 @@ namespace Coffee.UIExtensions
             _groupMaxId = serializedObject.FindProperty("m_GroupMaxId");
             _positionMode = serializedObject.FindProperty("m_PositionMode");
             _autoScalingMode = serializedObject.FindProperty("m_AutoScalingMode");
-            _useCustomView = serializedObject.FindProperty("m_UseCustomView");
-            _customViewSize = serializedObject.FindProperty("m_CustomViewSize");
 
             var sp = serializedObject.FindProperty("m_Particles");
             _ro = new ReorderableList(sp.serializedObject, sp, true, true, true, true)
             {
-                elementHeightCallback = index =>
-                {
-                    var ps = sp.GetArrayElementAtIndex(index).objectReferenceValue as ParticleSystem;
-                    var materialCount = 0;
-                    if (ps && ps.TryGetComponent<ParticleSystemRenderer>(out var psr))
-                    {
-                        materialCount = psr.sharedMaterials.Length;
-                    }
-
-                    return (materialCount + 1) * (EditorGUIUtility.singleLineHeight + 2);
-                },
+                elementHeight = EditorGUIUtility.singleLineHeight * 3 + 4,
+                elementHeightCallback = _ => 3 * (EditorGUIUtility.singleLineHeight + 2),
                 drawElementCallback = (rect, index, _, __) =>
                 {
-                    rect.y += 2;
+                    EditorGUI.BeginDisabledGroup(sp.hasMultipleDifferentValues);
+                    rect.y += 1;
                     rect.height = EditorGUIUtility.singleLineHeight;
                     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;
-
                     rect.x += 15;
                     rect.width -= 15;
-                    var materials = new SerializedObject(psr).FindProperty("m_Materials");
-                    var count = Mathf.Min(materials.arraySize, 2);
-                    for (var i = 0; i < count; i++)
-                    {
-                        rect.y += rect.height + 2;
-                        EditorGUI.PropertyField(rect, materials.GetArrayElementAtIndex(i), s_ContentMaterials[i]);
-                    }
-
-                    if (materials.serializedObject.hasModifiedProperties)
+                    var ps = p.objectReferenceValue as ParticleSystem;
+                    var materials = ps
+                        ? new SerializedObject(ps.GetComponent<ParticleSystemRenderer>()).FindProperty("m_Materials")
+                        : null;
+                    rect.y += rect.height + 1;
+                    MaterialField(rect, s_ContentMaterial, materials, 0);
+                    rect.y += rect.height + 1;
+                    MaterialField(rect, s_ContentTrailMaterial, materials, 1);
+                    EditorGUI.EndDisabledGroup();
+                    if (materials != null && materials.serializedObject.hasModifiedProperties)
                     {
                         materials.serializedObject.ApplyModifiedProperties();
                     }
@@ -162,6 +213,20 @@ namespace Coffee.UIExtensions
             }
         }
 
+        private static void MaterialField(Rect rect, GUIContent label, SerializedProperty sp, int index)
+        {
+            if (sp == null || sp.arraySize <= index)
+            {
+                EditorGUI.BeginDisabledGroup(true);
+                EditorGUI.ObjectField(rect, label, null, typeof(Material), true);
+                EditorGUI.EndDisabledGroup();
+            }
+            else
+            {
+                EditorGUI.PropertyField(rect, sp.GetArrayElementAtIndex(index), label);
+            }
+        }
+
         /// <summary>
         /// Implement this function to make a custom inspector.
         /// </summary>
@@ -170,7 +235,6 @@ namespace Coffee.UIExtensions
             var current = target as UIParticle;
             if (!current) return;
 
-            Profiler.BeginSample("(UIP:E) OnInspectorGUI");
             serializedObject.Update();
 
             // Maskable
@@ -182,8 +246,13 @@ namespace Coffee.UIExtensions
             EditorGUI.EndDisabledGroup();
 
             // AnimatableProperties
-            current.GetMaterials(s_TempMaterials);
-            AnimatablePropertyEditor.Draw(_animatableProperties, s_TempMaterials);
+            var mats = current.particles
+                .Where(x => x)
+                .Select(x => x.GetComponent<ParticleSystemRenderer>().sharedMaterial)
+                .Where(x => x)
+                .ToArray();
+
+            AnimatablePropertyEditor.Draw(_animatableProperties, mats);
 
             // Mesh sharing
             EditorGUI.BeginChangeCheck();
@@ -191,12 +260,9 @@ namespace Coffee.UIExtensions
             if (EditorGUI.EndChangeCheck())
             {
                 serializedObject.ApplyModifiedProperties();
-                foreach (var t in targets)
+                foreach (var uip in targets.OfType<UIParticle>())
                 {
-                    if (t is UIParticle uip)
-                    {
-                        uip.ResetGroupId();
-                    }
+                    uip.ResetGroupId();
                 }
             }
 
@@ -204,29 +270,16 @@ namespace Coffee.UIExtensions
             EditorGUILayout.PropertyField(_positionMode);
 
             // Auto Scaling
-            EditorGUILayout.PropertyField(_autoScalingMode);
-
-            // Custom View Size
-            EditorGUILayout.PropertyField(_useCustomView);
-            EditorGUI.BeginChangeCheck();
-            EditorGUI.BeginDisabledGroup(!_useCustomView.boolValue);
-            EditorGUI.indentLevel++;
-            EditorGUILayout.PropertyField(_customViewSize);
-            EditorGUI.indentLevel--;
-            EditorGUI.EndDisabledGroup();
-            if (EditorGUI.EndChangeCheck())
-            {
-                _customViewSize.floatValue = Mathf.Max(0.1f, _customViewSize.floatValue);
-            }
+            DrawAutoScaling(_autoScalingMode, targets.OfType<UIParticle>());
 
             // Target ParticleSystems.
             EditorGUI.BeginChangeCheck();
+            EditorGUI.BeginDisabledGroup(targets.OfType<UIParticle>().Any(x => !x.canvas));
             _ro.DoLayoutList();
+            EditorGUI.EndDisabledGroup();
             serializedObject.ApplyModifiedProperties();
-
             if (EditorGUI.EndChangeCheck())
             {
-                EditorApplication.QueuePlayerLoopUpdate();
                 foreach (var uip in targets.OfType<UIParticle>())
                 {
                     uip.RefreshParticles(uip.particles);
@@ -234,8 +287,7 @@ namespace Coffee.UIExtensions
             }
 
             // Non-UI built-in shader is not supported.
-            Profiler.BeginSample("(UIP:E) Non-UI built-in shader is not supported.");
-            foreach (var mat in s_TempMaterials)
+            foreach (var mat in current.materials)
             {
                 if (!mat || !mat.shader) continue;
                 var shader = mat.shader;
@@ -248,18 +300,15 @@ namespace Coffee.UIExtensions
                 }
             }
 
-            Profiler.EndSample();
-
             // Does the shader support UI masks?
-            Profiler.BeginSample("(UIP:E) Does the shader support UI masks?");
             if (current.maskable && current.GetComponentInParent<Mask>(false))
             {
-                foreach (var mat in s_TempMaterials)
+                foreach (var mat in current.materials)
                 {
                     if (!mat || !mat.shader) continue;
                     var shader = mat.shader;
-                    if (!s_Shaders.Add(shader)) continue;
-
+                    if (s_Shaders.Contains(shader)) continue;
+                    s_Shaders.Add(shader);
                     foreach (var propName in s_MaskablePropertyNames)
                     {
                         if (mat.HasProperty(propName)) continue;
@@ -273,15 +322,11 @@ namespace Coffee.UIExtensions
                 }
             }
 
-            s_TempMaterials.Clear();
             s_Shaders.Clear();
-            Profiler.EndSample();
 
             // UIParticle for trail should be removed.
             var label = "This UIParticle component should be removed. The UIParticle for trails is no longer needed.";
-#pragma warning disable CS0612
             if (FixButton(current.m_IsTrail, label))
-#pragma warning restore CS0612
             {
                 DestroyUIParticle(current);
             }
@@ -314,14 +359,12 @@ namespace Coffee.UIExtensions
                 }
             }
 #endif
-            Profiler.EndSample();
         }
 
-        private static bool IsBuiltInObject(Object obj)
+        private bool IsBuiltInObject(Object obj)
         {
-            return AssetDatabase.IsMainAsset(obj)
-                   && AssetDatabase.TryGetGUIDAndLocalFileIdentifier(obj, out var guid, out long _)
-                   && s_RegexBuiltInGuid.IsMatch(guid);
+            return AssetDatabase.TryGetGUIDAndLocalFileIdentifier(obj, out var guid, out long _)
+                   && Regex.IsMatch(guid, "^0{16}.0{15}$", RegexOptions.Compiled);
         }
 
 #if UNITY_2018 || UNITY_2019
@@ -415,7 +458,7 @@ namespace Coffee.UIExtensions
             {
                 EditorGUI.BeginDisabledGroup(true);
                 var obj = UIParticleUpdater.GetPrimary(spGroupId.intValue);
-                EditorGUILayout.ObjectField(s_ContentPrimary, obj, typeof(UIParticle), false);
+                EditorGUILayout.ObjectField("Primary", obj, typeof(UIParticle), false);
                 EditorGUI.EndDisabledGroup();
             }
 
@@ -425,20 +468,63 @@ namespace Coffee.UIExtensions
             return showMax;
         }
 
-        private static void DrawAutoScaling(SerializedProperty prop)
+        private static void DrawAutoScaling(SerializedProperty prop, IEnumerable<UIParticle> uiParticles)
         {
+            var isTransformMode = prop.intValue == (int)UIParticle.AutoScalingMode.Transform;
+            EditorGUI.BeginChangeCheck();
             EditorGUILayout.PropertyField(prop);
+            if (!EditorGUI.EndChangeCheck() || !isTransformMode) return;
+
+            // on changed true->false, reset scale.
+            EditorApplication.delayCall += () =>
+            {
+                foreach (var uip in uiParticles)
+                {
+                    if (!uip) continue;
+                    uip.transform.localScale = Vector3.one;
+                }
+            };
+        }
+
+#if UNITY_2021_2_OR_NEWER
+        private static void WindowFunction()
+#else
+        private static void WindowFunction(Object _, SceneView __)
+#endif
+        {
+            try
+            {
+                if (s_SerializedObject == null || !s_SerializedObject.targetObject) return;
+                var uiParticles = s_SerializedObject.targetObjects.OfType<UIParticle>().ToArray();
+                if (uiParticles.Any(x => !x || !x.canvas)) return;
+
+                s_SerializedObject.Update();
+                using (new EditorGUILayout.VerticalScope(GUILayout.Width(220f)))
+                {
+                    var labelWidth = EditorGUIUtility.labelWidth;
+                    EditorGUIUtility.labelWidth = 100;
+                    EditorGUILayout.PropertyField(s_SerializedObject.FindProperty("m_Enabled"));
+                    s_XYZMode = DrawFloatOrVector3Field(s_SerializedObject.FindProperty("m_Scale3D"), s_XYZMode);
+                    EditorGUILayout.PropertyField(s_SerializedObject.FindProperty("m_PositionMode"));
+                    DrawAutoScaling(s_SerializedObject.FindProperty("m_AutoScalingMode"), uiParticles);
+                    EditorGUIUtility.labelWidth = labelWidth;
+                }
+
+                s_SerializedObject.ApplyModifiedProperties();
+            }
+            catch
+            {
+                // ignored
+            }
         }
 
         private void DestroyUIParticle(UIParticle p, bool ignoreCurrent = false)
         {
             if (!p || (ignoreCurrent && target == p)) return;
 
-            Misc.DestroyImmediate(p);
-            if (p.TryGetComponent<CanvasRenderer>(out var cr))
-            {
-                Misc.DestroyImmediate(cr);
-            }
+            var cr = p.canvasRenderer;
+            DestroyImmediate(p);
+            DestroyImmediate(cr);
 
 #if UNITY_2018_3_OR_NEWER
             var stage = PrefabStageUtility.GetCurrentPrefabStage();

Packages/src/LICENSE.md

@@ -1,4 +1,4 @@
-Copyright 2018-2024 mob-sakai
+Copyright 2018-2023 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:
 

Packages/src/README.md

@@ -0,0 +1,483 @@
+# Particle Effect For UGUI (UI Particle)
+
+This package provides a component to render particle effects for uGUI in Unity 2018.2 or later.  
+The particle rendering is maskable and sortable, without the need for an extra Camera, RenderTexture, or Canvas.
+
+[![](https://img.shields.io/npm/v/com.coffee.ui-particle?label=openupm&registry_uri=https://package.openupm.com)](https://openupm.com/packages/com.coffee.ui-particle/)
+[![](https://img.shields.io/github/v/release/mob-sakai/ParticleEffectForUGUI?include_prereleases)](https://github.com/mob-sakai/ParticleEffectForUGUI/releases)
+[![](https://img.shields.io/github/license/mob-sakai/ParticleEffectForUGUI.svg)](https://github.com/mob-sakai/ParticleEffectForUGUI/blob/main/LICENSE.txt)  
+![](https://img.shields.io/badge/Unity-2018.2+-57b9d3.svg?style=flat&logo=unity)
+![](https://github.com/mob-sakai/ParticleEffectForUGUI/actions/workflows/test.yml/badge.svg?branch=develop)
+[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-orange.svg)](http://makeapullrequest.com)
+[![](https://img.shields.io/twitter/follow/mob_sakai.svg?label=Follow&style=social)](https://twitter.com/intent/follow?screen_name=mob_sakai)
+
+<< [📝 Description](#-description) | [🎮 Demo](#-demo) | [⚙ Installation](#-installation) | [🚀 Usage](#-usage) | [🛠 Development Note](#-development-note) | [🤝 Contributing](#-contributing) >>
+
+<br><br>
+
+## 📝 Description
+
+![](https://user-images.githubusercontent.com/12690315/41771577-8da4b968-7650-11e8-9524-cd162c422d9d.gif)
+
+This package utilizes the new APIs `MeshBake/MashTrailBake` (introduced with Unity 2018.2) to render particles through
+CanvasRenderer.  
+You can render, mask, and sort your ParticleSystems for UI without the necessity of an additional Camera, RenderTexture,
+or Canvas.
+
+### Features
+
+* Easy to use: The package is ready to use out of the box.
+* Sort particle effects and other UI by sibling index.
+* No extra Camera, RenderTexture, or Canvas required.
+* Masking options for Mask or RectMask2D.
+* Support for the Trail module.
+* Support for CanvasGroup alpha.
+* No allocations needed to render particles.
+* Compatibility with overlay, camera space, and world space.
+* Support for Universal Render Pipeline (URP) and High Definition Render Pipeline (HDRP).
+* Support for disabling `Enter Play Mode Options > Reload Domain`.
+* Support for changing material property with AnimationClip (AnimatableProperty).  
+  ![AnimatableProperty.gif][AnimatableProperty.gif]
+* [4.0.0+] Support for 8+ materials.
+* [4.0.0+] Correct world space particle position adjustment when changing window size for standalone platforms (Windows,
+  MacOSX, and Linux).
+* [4.0.0+] Adaptive scaling for UI.
+* [4.0.0+] Mesh sharing group to improve performance.  
+  ![MeshSharing.gif][MeshSharing.gif]
+* [4.0.0+] Particle attractor component.  
+  ![ParticleAttractor.gif][ParticleAttractor.gif]
+* [4.1.0+] Relative/Absolute particle position mode.  
+  ![AbsolutePosition.gif][AbsolutePosition.gif]
+
+[AnimatableProperty.gif]: https://user-images.githubusercontent.com/12690315/53286323-2d94a980-37b0-11e9-8afb-c4a207805ff2.gif
+
+[MeshSharing.gif]: https://user-images.githubusercontent.com/12690315/174311048-c882df81-6c34-4eba-b0aa-5645457692f1.gif
+
+[ParticleAttractor.gif]: https://user-images.githubusercontent.com/12690315/174311027-462929a4-13f0-4ec4-86ea-9c832f2eecf1.gif
+
+[AbsolutePosition.gif]: https://user-images.githubusercontent.com/12690315/175751579-5a2357e8-2ecf-4afd-83c8-66e9771bde39.gif
+
+<br><br>
+
+## 🎮 Demo
+
+* [WebGL Demo](https://mob-sakai.github.io/demos/UIParticle_Demo/index.html)
+
+> ![](https://user-images.githubusercontent.com/12690315/174311768-1843a5f2-f776-491b-aaa8-2a131a8b6a16.gif)
+
+* [WebGL Demo (Cartoon FX & War FX)](https://mob-sakai.github.io/Demos/ParticleEffectForUGUI_CFX)
+    * [Cartoon FX Free][CFX] & [War FX][WFX] (by [Jean Moreno (JMO)][JMO]) with UIParticle
+
+> ![](https://user-images.githubusercontent.com/12690315/91664766-3e07ac00-eb2c-11ea-978b-ef723be80619.gif)
+
+[CFX]: https://assetstore.unity.com/packages/vfx/particles/cartoon-fx-free-109565
+
+[WFX]: https://assetstore.unity.com/packages/vfx/particles/war-fx-5669
+
+[JMO]: https://assetstore.unity.com/publishers/1669
+
+
+<br><br>
+
+## ⚙ Installation
+
+_This package requires Unity 2018.3 or later._
+
+#### Install via OpenUPM
+
+This package is available on [OpenUPM](https://openupm.com) package registry.
+This is the preferred method of installation, as you can easily receive updates as they're released.
+
+If you have [openupm-cli](https://github.com/openupm/openupm-cli) installed, then run the following command in your
+project's directory:
+
+```sh
+openupm add com.coffee.ui-particle
+```
+
+#### Install via UPM (using Git URL)
+
+Navigate to your project's Packages folder and open the `manifest.json` file. Then add this package somewhere in
+the `dependencies` block:
+
+```json
+{
+  "dependencies": {
+    "com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git",
+    ...
+  }
+}
+```
+
+To update the package, change suffix `#{version}` to the target version.
+
+* e.g. `"com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.6.0",`
+
+Or, use [UpmGitExtension](https://github.com/mob-sakai/UpmGitExtension) to install and update the package.
+
+<br><br>
+
+## 🚀 Usage
+
+### UIParticle Component
+
+`UIParticle` controls the ParticleSystems that are attached to its own game objects and child game objects.
+
+![](https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/3559df45-63e7-4c4c-9233-f455779efa29)
+
+- **Maskable**: Does this graphic allow masking.
+- **Scale**: Scale the rendering. 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 the changes.
+- **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.
+- **Position Mode**: Emission position mode.
+    - **Absolute:** Emit from the world position of the `ParticleSystem`.
+    - **Relative:** Emit from the scaled position of the `ParticleSystem`.
+- **Auto Scaling**: `Transform.lossyScale` (=world scale) will be set to `(1, 1, 1)` on update. It prevents the
+  root-Canvas scale from affecting the hierarchy-scaled `ParticleSystem`.
+- **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
+and z-position.
+
+<br><br>
+
+#### Basic Usage
+
+1. Select `GameObject/UI/ParticleSystem` to create UIParticle with a ParticleSystem.
+   ![particle](https://user-images.githubusercontent.com/12690315/95007361-cad0e880-0649-11eb-8835-f145d62c5977.png)
+2. Adjust the ParticleSystem as you like.
+   ![particle1](https://user-images.githubusercontent.com/12690315/95007359-ca385200-0649-11eb-8383-627c9750bda8.png)
+
+<br>
+
+#### With Your Existing ParticleSystem Prefab
+
+1. Select `GameObject/UI/ParticleSystem (Empty)` to create UIParticle.
+   ![empty](https://user-images.githubusercontent.com/12690315/95007362-cb697f00-0649-11eb-8a09-29b0a13791e4.png)
+2. Drag and drop your ParticleSystem prefab onto UIParticle.
+   ![particle3](https://user-images.githubusercontent.com/12690315/95007356-c6a4cb00-0649-11eb-9316-562f4bce3f31.png)
+
+<br>
+
+#### With `Mask` or `RectMask2D` Component
+
+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)
+section.
+
+![](https://user-images.githubusercontent.com/12690315/95017591-3b512700-0695-11eb-864e-04166ea1809a.png)
+
+<br><br>
+
+### Script usage
+
+```cs
+// Instant ParticleSystem prefab with UIParticle on runtime.
+var go = GameObject.Instantiate(prefab);
+var uiParticle = go.AddComponent<UIParticle>();
+
+// Control by ParticleSystem.
+particleSystem.Play();
+particleSystem.Emit(10);
+
+// Control by UIParticle.
+uiParticle.Play();
+uiParticle.Stop();
+```
+
+<br><br>
+
+### UIParticleAttractor component
+
+`UIParticleAttractor` attracts particles generated by the specified ParticleSystem.
+
+![](https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/ea6ae0ed-f9a8-437c-8baa-47526303391e)  
+![](https://user-images.githubusercontent.com/12690315/174311027-462929a4-13f0-4ec4-86ea-9c832f2eecf1.gif)
+
+- **Particle System**: Attracts particles generated by the specified particle system.
+- **Destination Radius**: Once the particle is within the radius, the particle lifetime will become 0, and `OnAttracted`
+  will be called.
+- **Delay Rate**: Delay to start attracting. It is a percentage of the particle's start lifetime.
+- **Max Speed**: Maximum speed of attracting. If this value is too small, attracting may not be completed by the end of
+  the lifetime, and `OnAttracted` may not be called.
+- **Movement**: Attracting movement type. (`Linear`, `Smooth`, `Sphere`)
+- **Update Mode**: Update mode.
+    - **Normal:** Update with scaled delta time.
+    - **Unscaled Time:** Update with unscaled delta time.
+- **OnAttracted**: An event called when attracting is complete (per particle).
+
+<br><br>
+
+## 🛠 Development Note
+
+### Compares the Baking mesh approach with the conventional approach
+
+- **Baking mesh approach (=UIParticle)**  
+  ![](https://user-images.githubusercontent.com/12690315/41765089-0302b9a2-763e-11e8-88b3-b6ffa306bbb0.gif)
+    - ✅ Rendered as is.
+    - ✅ Maskable.
+    - ✅ Sortable.
+    - ✅ Less objects.
+
+- **Do nothing (=Plain ParticleSystem)**  
+  ![](https://user-images.githubusercontent.com/12690315/41765090-0329828a-763e-11e8-8d8a-f1d269ea3bc7.gif)
+    - ✅ Rendered as is.
+    - ❌ Looks like a glitch.
+    - ❌ Not maskable.
+    - ❌ Not sortable.
+
+- **Convert particle to UIVertex (=[UIParticleSystem][UIParticleSystem])**  
+  ![](https://user-images.githubusercontent.com/12690315/41765088-02deb9c6-763e-11e8-98d0-9e0c1766ef39.gif)
+    - ✅ Maskable.
+    - ✅ Sortable.
+    - ❌ Adjustment is difficult.
+    - ❌ Requires UI shaders.
+    - ❌ Difficult to adjust scale.
+    - ❌ Force hierarchy scalling.
+    - ❌ Simulation results are incorrect.
+    - ❌ Trail, rotation of transform, time scaling are not supported.
+    - ❌ Generate heavy GC every frame.
+
+- **Use Canvas to sort (Sorting By Canvas )**  
+  ![](https://user-images.githubusercontent.com/12690315/41765087-02b866ea-763e-11e8-8c33-081c9ad852f8.gif)
+    - ✅ Rendered as is.
+    - ✅ Sortable.
+    - ❌ You must to manage sorting orders.
+    - ❌ Not maskable.
+    - ❌ More batches.
+    - ❌ Requires Canvas.
+
+- **Use RenderTexture**  
+  ![](https://user-images.githubusercontent.com/12690315/41765085-0291b3e2-763e-11e8-827b-72e5ee9bc556.gif)
+    - ✅ Maskable.
+    - ✅ Sortable.
+    - ❌ Requires Camera and RenderTexture.
+    - ❌ Difficult to adjust position and size.
+    - ❌ Quality depends on the RenderTexture's setting.
+
+[UIParticleSystem]: https://forum.unity.com/threads/free-script-particle-systems-in-ui-screen-space-overlay.406862/
+
+#### [Performance test results](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/193#issuecomment-1160028374)
+
+| Approach                    | FPS on Editor | FPS on iPhone6 | FPS on Xperia XZ |
+|-----------------------------|---------------|----------------|------------------|
+| Particle System             | 43            | 57             | 22               |
+| UIParticleSystem            | 4             | 3              | 0 (unmeasurable) |
+| Sorting By Canvas           | 43            | 44             | 18               |
+| UIParticle                  | 17            | 12             | 4                |
+| UIParticle with MeshSharing | 44            | 45             | 30               |
+
+### 🔍 FAQ: Why Are My UIParticles Not Displayed Correctly?
+
+If `ParticleSystem` alone displays particles correctly but `UIParticle` does not, please check the following points:
+
+- [Shader Limitation](#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.
+    - 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.
+- Particles are emitted off-screen.
+    - When `Position Mode = Relative`, particles are emitted from the scaled position of the ParticleSystem, not from
+      the screen point of the ParticleSystem.
+    - 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.
+- Displayed particles are in the correct position but too large/too small
+    - Adjust `ParticleSystem.renderer.Min/MaxParticleSize`.
+
+<br>
+
+### Shader Limitation
+
+The use of UI shaders is recommended.
+
+- If you need a simple Additive shader, use the `UI/Additive` shader instead.
+- If you need a simple alpha-blend shader, use the `UI/Default` shader instead.
+- If your custom shader does not work properly with UIParticle, consider creating a custom UI shader.
+
+#### Built-in shaders are not supported
+
+`UIParticle` does not support all built-in shaders except for `UI/Default`.  
+If their use is detected, an error is displayed in the inspector.  
+Use UI shaders instead.
+
+#### (Unity 2018 or 2019) UV.zw components will be discarded
+
+UIParticleRenderer renders the particles based on UIVertex.  
+Therefore, only the xy components are available for each UV in the shader. (zw components will be discarded).  
+So unfortunately, UIParticles will not work well with some shaders.
+
+#### (Unity 2018 or 2019) Custom vertex streams
+
+When using custom vertex streams, you can fill zw components with "unnecessary" data.  
+Refer to [this issue](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/191) for more information.
+
+<br>
+
+### Overheads
+
+UIParticle has some overheads, and the batching depends on uGUI.  
+When improving performance, keep the following in mind:
+
+- If you are displaying a large number of the same effect, consider the `Mesh Sharing` feature in
+  the [UIParticle Component](#uiparticle-component).
+    - If you don't like the uniform output, consider the `Random Group` feature.  
+      ![](https://user-images.githubusercontent.com/12690315/174311048-c882df81-6c34-4eba-b0aa-5645457692f1.gif)
+- If you are using multiple materials, you will have more draw calls.
+    - Consider a single material, atlasing the sprites, and using `Sprite` mode in the `Texture Sheet Animation` module
+      in the ParticleSystem.
+
+### How to Make a Custom Shader to Support Mask/RectMask2D Component
+
+<details>
+<summary>Shader tips</summary>
+
+```ShaderLab
+Shader "Your/Custom/Shader"
+{
+    Properties
+    {
+        // ...
+        // #### required for Mask ####
+        _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
+        {
+            // ...
+        }
+
+        // #### required for Mask ####
+        Stencil
+        {
+            Ref [_Stencil]
+            Comp [_StencilComp]
+            Pass [_StencilOp]
+            ReadMask [_StencilReadMask]
+            WriteMask [_StencilWriteMask]
+        }
+        ColorMask [_ColorMask]
+        // ...
+
+        Pass
+        {
+            // ...
+            // #### required for RectMask2D ####
+            #include "UnityUI.cginc"
+            #pragma multi_compile __ UNITY_UI_CLIP_RECT
+            float4 _ClipRect;
+
+            // #### required for Mask ####
+            #pragma multi_compile __ UNITY_UI_ALPHACLIP
+
+            struct appdata_t
+            {
+                // ...
+            };
+
+            struct v2f
+            {
+                // ...
+                // #### required for RectMask2D ####
+                float4 worldPosition    : TEXCOORD1;
+            };
+            
+            v2f vert(appdata_t v)
+            {
+                v2f OUT;
+                // ...
+                // #### required for RectMask2D ####
+                OUT.worldPosition = v.vertex;
+                return OUT;
+            }
+
+            fixed4 frag(v2f IN) : SV_Target
+            {
+                // ...
+                // #### required for RectMask2D ####
+                #ifdef UNITY_UI_CLIP_RECT
+                    color.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect);
+                #endif
+
+                // #### required for Mask ####
+                #ifdef UNITY_UI_ALPHACLIP
+                    clip (color.a - 0.001);
+                #endif
+
+                return color;
+            }
+            ENDCG
+        }
+    }
+}
+```
+
+</details>
+
+<br><br>
+
+## 🤝 Contributing
+
+### Issues
+
+Issues are incredibly valuable to this project:
+
+- Ideas provide a valuable source of contributions that others can make.
+- Problems help identify areas where this project needs improvement.
+- Questions indicate where contributors can enhance the user experience.
+
+### Pull Requests
+
+Pull requests offer a fantastic way to contribute your ideas to this repository.  
+Please refer to [CONTRIBUTING.md](https://github.com/mob-sakai/ParticleEffectForUGUI/blob/main/CONTRIBUTING.md)
+and [develop branch](https://github.com/mob-sakai/ParticleEffectForUGUI/tree/develop) for guidelines.
+
+### Support
+
+This is an open-source project developed during my spare time.  
+If you appreciate it, consider supporting me.  
+Your support allows me to dedicate more time to development. 😊
+
+[![](https://user-images.githubusercontent.com/12690315/50731629-3b18b480-11ad-11e9-8fad-4b13f27969c1.png)](https://www.patreon.com/join/2343451?)  
+[![](https://user-images.githubusercontent.com/12690315/66942881-03686280-f085-11e9-9586-fc0b6011029f.png)](https://github.com/users/mob-sakai/sponsorship)
+
+<br><br>
+
+## License
+
+* MIT
+
+## Author
+
+* ![](https://user-images.githubusercontent.com/12690315/96986908-434a0b80-155d-11eb-8275-85138ab90afa.png) [mob-sakai](https://github.com/mob-sakai) [![](https://img.shields.io/twitter/follow/mob_sakai.svg?label=Follow&style=social)](https://twitter.com/intent/follow?screen_name=mob_sakai) ![GitHub followers](https://img.shields.io/github/followers/mob-sakai?style=social)
+
+## See Also
+
+* GitHub page : https://github.com/mob-sakai/ParticleEffectForUGUI
+* Releases : https://github.com/mob-sakai/ParticleEffectForUGUI/releases
+* Issue tracker : https://github.com/mob-sakai/ParticleEffectForUGUI/issues
+* Change log : https://github.com/mob-sakai/ParticleEffectForUGUI/blob/main/CHANGELOG.md

Packages/src/Runtime/ModifiedMaterial.cs

@@ -0,0 +1,72 @@
+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 : null
+                }
+            };
+            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;
+        }
+    }
+}

Packages/src/Runtime/ModifiedMaterial.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: b0beae5bb1cb142b9ab90dc0d371f026
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/src/Runtime/UIParticle.cs

@@ -1,11 +1,12 @@
 using System;
 using System.Collections.Generic;
 using System.Runtime.CompilerServices;
-using Coffee.UIParticleInternal;
+using Coffee.UIParticleExtensions;
+using UnityEditor;
 using UnityEngine;
-using UnityEngine.EventSystems;
 using UnityEngine.Rendering;
 using UnityEngine.Serialization;
+using UnityEngine.UI;
 using Random = UnityEngine.Random;
 
 [assembly: InternalsVisibleTo("Coffee.UIParticle.Editor")]
@@ -18,7 +19,7 @@ namespace Coffee.UIExtensions
     [ExecuteAlways]
     [RequireComponent(typeof(RectTransform))]
     [RequireComponent(typeof(CanvasRenderer))]
-    public class UIParticle : UIBehaviour, ISerializationCallbackReceiver
+    public class UIParticle : MaskableGraphic, ISerializationCallbackReceiver
     {
         public enum AutoScalingMode
         {
@@ -44,26 +45,23 @@ namespace Coffee.UIExtensions
 
         [HideInInspector]
         [SerializeField]
-        [Obsolete]
         internal bool m_IsTrail;
 
         [HideInInspector]
         [FormerlySerializedAs("m_IgnoreParent")]
         [SerializeField]
-        [Obsolete]
         private bool m_IgnoreCanvasScaler;
 
         [HideInInspector]
         [SerializeField]
-        [Obsolete]
-        internal bool m_AbsoluteMode;
+        private bool m_AbsoluteMode;
 
-        [Tooltip("Scale the rendering particles. When the `3D` toggle is enabled, 3D scale (x, y, z) is supported.")]
+        [Tooltip("Particle effect scale")]
         [SerializeField]
-        private Vector3 m_Scale3D = new Vector3(1, 1, 1);
+        private Vector3 m_Scale3D = new Vector3(10, 10, 10);
 
-        [Tooltip("If you want to update material properties (e.g. _MainTex_ST, _Color) in AnimationClip, " +
-                 "use this to mark as animatable.")]
+        [Tooltip("Animatable material properties.\n" +
+                 "If you want to change the material properties of the ParticleSystem in Animation, enable it.")]
         [SerializeField]
         internal AnimatableProperty[] m_AnimatableProperties = new AnimatableProperty[0];
 
@@ -71,13 +69,12 @@ namespace Coffee.UIExtensions
         [SerializeField]
         private List<ParticleSystem> m_Particles = new List<ParticleSystem>();
 
-        [Tooltip("Particle simulation results are shared within the same group. " +
-                 "A large number of the same effects can be displayed with a small load.\n" +
-                 "None: Disable mesh sharing.\n" +
-                 "Auto: Automatically select Primary/Replica.\n" +
-                 "Primary: Provides particle simulation results to the same group.\n" +
+        [Tooltip("Mesh sharing.\n" +
+                 "None: disable mesh sharing.\n" +
+                 "Auto: automatically select Primary/Replica.\n" +
+                 "Primary: provides particle simulation results to the same group.\n" +
                  "Primary Simulator: Primary, but do not render the particle (simulation only).\n" +
-                 "Replica: Render simulation results provided by the primary.")]
+                 "Replica: render simulation results provided by the primary.")]
         [SerializeField]
         private MeshSharing m_MeshSharing = MeshSharing.None;
 
@@ -89,81 +86,39 @@ namespace Coffee.UIExtensions
         [SerializeField]
         private int m_GroupMaxId;
 
-        [Tooltip("Emission position mode.\n" +
-                 "Relative: The particles will be emitted from the scaled position.\n" +
-                 "Absolute: The particles will be emitted from the world position.")]
+        [Tooltip("Relative: The particles will be emitted from the scaled position of ParticleSystem.\n" +
+                 "Absolute: The particles will be emitted from the world position of ParticleSystem.")]
         [SerializeField]
         private PositionMode m_PositionMode = PositionMode.Relative;
 
         [SerializeField]
-        [Obsolete]
-        internal bool m_AutoScaling;
+        [Tooltip("Prevent the root-Canvas scale from affecting the hierarchy-scaled ParticleSystem.")]
+        private bool m_AutoScaling = true;
 
         [SerializeField]
-        [Tooltip(
-            "How to automatically adjust when the Canvas scale is changed by the screen size or reference resolution.\n" +
-            "None: Do nothing.\n" +
-            "Transform: Transform.lossyScale (=world scale) will be set to (1, 1, 1).\n" +
-            "UIParticle: UIParticle.scale will be adjusted.")]
+        [Tooltip("Transform: Transform.lossyScale (=world scale) will be set to (1, 1, 1)." +
+                 "UIParticle: UIParticle.scale will be adjusted.")]
         private AutoScalingMode m_AutoScalingMode = AutoScalingMode.Transform;
 
         [SerializeField]
-        [Tooltip("Use a custom view.\n" +
-                 "Use this if the particles are not displayed correctly due to min/max particle size.")]
-        private bool m_UseCustomView;
-
-        [SerializeField]
-        [Tooltip("Custom view size.\n" +
-                 "Change the bake view size.")]
-        private float m_CustomViewSize = 10;
-
-        [SerializeField]
-        private bool m_Maskable = true;
+        private bool m_ResetScaleOnEnable;
 
         private readonly List<UIParticleRenderer> _renderers = new List<UIParticleRenderer>();
-        private Camera _bakeCamera;
-        private Canvas _canvas;
         private int _groupId;
-        private bool _isScaleStored;
-        private Vector3 _storedScale;
+        private Camera _orthoCamera;
         private DrivenRectTransformTracker _tracker;
 
-        public RectTransform rectTransform => transform as RectTransform;
-
-        public Canvas canvas
-        {
-            get
-            {
-                if (_canvas) return _canvas;
-
-                var tr = transform;
-                while (tr && !_canvas)
-                {
-                    if (tr.TryGetComponent(out _canvas)) return _canvas;
-                    tr = tr.parent;
-                }
-
-                return null;
-            }
-        }
-
         /// <summary>
-        /// Does this graphic allow masking.
+        /// Should this graphic be considered a target for ray-casting?
         /// </summary>
-        public bool maskable
+        public override bool raycastTarget
         {
-            get => m_Maskable;
-            set
-            {
-                if (value == m_Maskable) return;
-                m_Maskable = value;
-                UpdateRendererMaterial();
-            }
+            get => false;
+            set { }
         }
 
         /// <summary>
-        /// Particle simulation results are shared within the same group.
-        /// A large number of the same effects can be displayed with a small load.
+        /// Mesh sharing.
         /// None: disable mesh sharing.
         /// Auto: automatically select Primary/Replica.
         /// Primary: provides particle simulation results to the same group.
@@ -206,9 +161,9 @@ namespace Coffee.UIExtensions
         }
 
         /// <summary>
-        /// Emission position mode.
-        /// Relative: The particles will be emitted from the scaled position.
-        /// Absolute: The particles will be emitted from the world position.
+        /// Particle position mode.
+        /// Relative: The particles will be emitted from the scaled position of the ParticleSystem.
+        /// Absolute: The particles will be emitted from the world position of the ParticleSystem.
         /// </summary>
         public PositionMode positionMode
         {
@@ -221,7 +176,6 @@ namespace Coffee.UIExtensions
         /// Relative: The particles will be emitted from the scaled position of the ParticleSystem.
         /// Absolute: The particles will be emitted from the world position of the ParticleSystem.
         /// </summary>
-        [Obsolete("The absoluteMode is now obsolete. Please use the autoScalingMode instead.", false)]
         public bool absoluteMode
         {
             get => m_PositionMode == PositionMode.Absolute;
@@ -239,12 +193,8 @@ namespace Coffee.UIExtensions
         }
 
         /// <summary>
-        /// How to automatically adjust when the Canvas scale is changed by the screen size or reference resolution.
-        /// <para/>
-        /// None: Do nothing.
-        /// <para/>
+        /// Auto scaling mode.
         /// Transform: Transform.lossyScale (=world scale) will be set to (1, 1, 1).
-        /// <para/>
         /// UIParticle: UIParticle.scale will be adjusted.
         /// </summary>
         public AutoScalingMode autoScalingMode
@@ -254,35 +204,10 @@ namespace Coffee.UIExtensions
             {
                 if (m_AutoScalingMode == value) return;
                 m_AutoScalingMode = value;
-
-                if (autoScalingMode != AutoScalingMode.Transform && _isScaleStored)
-                {
-                    transform.localScale = _storedScale;
-                    _isScaleStored = false;
-                }
+                UpdateTracker();
             }
         }
 
-        /// <summary>
-        /// Use a custom view.
-        /// Use this if the particles are not displayed correctly due to min/max particle size.
-        /// </summary>
-        public bool useCustomView
-        {
-            get => m_UseCustomView;
-            set => m_UseCustomView = value;
-        }
-
-        /// <summary>
-        /// Custom view size.
-        /// Change the bake view size.
-        /// </summary>
-        public float customViewSize
-        {
-            get => m_CustomViewSize;
-            set => m_CustomViewSize = Mathf.Max(0.1f, value);
-        }
-
         internal bool useMeshSharing => m_MeshSharing != MeshSharing.None;
 
         internal bool isPrimary =>
@@ -322,12 +247,30 @@ namespace Coffee.UIExtensions
         /// <summary>
         /// Particle effect scale.
         /// </summary>
-        public Vector3 scale3DForCalc => autoScalingMode == AutoScalingMode.Transform
-            ? m_Scale3D
-            : m_Scale3D.GetScaled(canvasScale, transform.localScale);
+        public Vector3 scale3DForCalc => autoScalingMode == AutoScalingMode.UIParticle
+            ? m_Scale3D.GetScaled(canvasScale)
+            : m_Scale3D;
 
         public List<ParticleSystem> particles => m_Particles;
 
+        /// <summary>
+        /// Get all base materials to render.
+        /// </summary>
+        public IEnumerable<Material> materials
+        {
+            get
+            {
+                for (var i = 0; i < _renderers.Count; i++)
+                {
+                    var r = _renderers[i];
+                    if (!r || !r.material) continue;
+                    yield return r.material;
+                }
+            }
+        }
+
+        public override Material materialForRendering => null;
+
         /// <summary>
         /// Paused.
         /// </summary>
@@ -335,15 +278,15 @@ namespace Coffee.UIExtensions
 
         public Vector3 parentScale { get; private set; }
 
-        private Vector3 canvasScale { get; set; }
+        public Vector3 canvasScale { get; private set; }
 
         protected override void OnEnable()
         {
-            _isScaleStored = false;
             ResetGroupId();
+            UpdateTracker();
             UIParticleUpdater.Register(this);
+            RegisterDirtyMaterialCallback(UpdateRendererMaterial);
 
-            //
             if (0 < particles.Count)
             {
                 RefreshParticles(particles);
@@ -353,7 +296,14 @@ namespace Coffee.UIExtensions
                 RefreshParticles();
             }
 
-            UpdateRendererMaterial();
+            base.OnEnable();
+
+            // Reset scale for upgrade.
+            if (m_ResetScaleOnEnable)
+            {
+                m_ResetScaleOnEnable = false;
+                transform.localScale = Vector3.one;
+            }
         }
 
         /// <summary>
@@ -361,24 +311,12 @@ namespace Coffee.UIExtensions
         /// </summary>
         protected override void OnDisable()
         {
-            _tracker.Clear();
-            if (autoScalingMode == AutoScalingMode.Transform && _isScaleStored)
-            {
-                transform.localScale = _storedScale;
-            }
-
-            _isScaleStored = false;
+            UpdateTracker();
             UIParticleUpdater.Unregister(this);
             _renderers.ForEach(r => r.Reset());
-            _canvas = null;
-        }
+            UnregisterDirtyMaterialCallback(UpdateRendererMaterial);
 
-        /// <summary>
-        /// Called when the state of the parent Canvas is changed.
-        /// </summary>
-        protected override void OnCanvasHierarchyChanged()
-        {
-            _canvas = null;
+            base.OnDisable();
         }
 
         /// <summary>
@@ -388,13 +326,13 @@ namespace Coffee.UIExtensions
         {
         }
 
-        /// <summary>
-        /// This function is called when a direct or indirect parent of the transform of the GameObject has changed.
-        /// </summary>
-        protected override void OnTransformParentChanged()
+#if UNITY_EDITOR
+        protected override void OnValidate()
         {
-            _canvas = null;
+            base.OnValidate();
+            UpdateTracker();
         }
+#endif
 
         void ISerializationCallbackReceiver.OnBeforeSerialize()
         {
@@ -402,12 +340,22 @@ namespace Coffee.UIExtensions
 
         void ISerializationCallbackReceiver.OnAfterDeserialize()
         {
-#pragma warning disable CS0612 // Type or member is obsolete
             if (m_IgnoreCanvasScaler || m_AutoScaling)
             {
                 m_IgnoreCanvasScaler = false;
                 m_AutoScaling = false;
                 m_AutoScalingMode = AutoScalingMode.Transform;
+                m_ResetScaleOnEnable = true;
+
+#if UNITY_EDITOR
+                EditorApplication.delayCall += () =>
+                {
+                    if (!this || !gameObject || !transform || Application.isPlaying) return;
+                    transform.localScale = Vector3.one;
+                    m_ResetScaleOnEnable = false;
+                    EditorUtility.SetDirty(this);
+                };
+#endif
             }
 
             if (m_AbsoluteMode)
@@ -415,47 +363,31 @@ namespace Coffee.UIExtensions
                 m_AbsoluteMode = false;
                 m_PositionMode = PositionMode.Absolute;
             }
-#pragma warning restore CS0612 // Type or member is obsolete
         }
 
-        /// <summary>
-        /// Play the ParticleSystems.
-        /// </summary>
         public void Play()
         {
             particles.Exec(p => p.Simulate(0, false, true));
             isPaused = false;
         }
 
-        /// <summary>
-        /// Pause the ParticleSystems.
-        /// </summary>
         public void Pause()
         {
             particles.Exec(p => p.Pause());
             isPaused = true;
         }
 
-        /// <summary>
-        /// Unpause the ParticleSystems.
-        /// </summary>
         public void Resume()
         {
             isPaused = false;
         }
 
-        /// <summary>
-        /// Stop the ParticleSystems.
-        /// </summary>
         public void Stop()
         {
             particles.Exec(p => p.Stop());
             isPaused = true;
         }
 
-        /// <summary>
-        /// Start emission of the ParticleSystems.
-        /// </summary>
         public void StartEmission()
         {
             particles.Exec(p =>
@@ -465,9 +397,6 @@ namespace Coffee.UIExtensions
             });
         }
 
-        /// <summary>
-        /// Stop emission of the ParticleSystems.
-        /// </summary>
         public void StopEmission()
         {
             particles.Exec(p =>
@@ -477,52 +406,24 @@ namespace Coffee.UIExtensions
             });
         }
 
-        /// <summary>
-        /// Clear the particles of the ParticleSystems.
-        /// </summary>
         public void Clear()
         {
             particles.Exec(p => p.Clear());
             isPaused = true;
         }
 
-        /// <summary>
-        /// Get all base materials to render.
-        /// </summary>
-        public void GetMaterials(List<Material> result)
-        {
-            if (result == null) return;
-
-            for (var i = 0; i < _renderers.Count; i++)
-            {
-                var r = _renderers[i];
-                if (!r || !r.material) continue;
-                result.Add(r.material);
-            }
-        }
-
-        /// <summary>
-        /// Refresh UIParticle using the ParticleSystem instance.
-        /// </summary>
         public void SetParticleSystemInstance(GameObject instance)
         {
             SetParticleSystemInstance(instance, true);
         }
 
-        /// <summary>
-        /// Refresh UIParticle using the ParticleSystem instance.
-        /// </summary>
         public void SetParticleSystemInstance(GameObject instance, bool destroyOldParticles)
         {
             if (!instance) return;
 
-            var childCount = transform.childCount;
-            for (var i = 0; i < childCount; i++)
+            foreach (Transform child in transform)
             {
-                var go = transform.GetChild(i).gameObject;
-                if (go.TryGetComponent<Camera>(out var cam) && cam == _bakeCamera) continue;
-                if (go.TryGetComponent<UIParticleRenderer>(out var _)) continue;
-
+                var go = child.gameObject;
                 go.SetActive(false);
                 if (destroyOldParticles)
                 {
@@ -537,10 +438,6 @@ namespace Coffee.UIExtensions
             RefreshParticles(instance);
         }
 
-        /// <summary>
-        /// Refresh UIParticle using the prefab.
-        /// The prefab is automatically instantiated.
-        /// </summary>
         public void SetParticleSystemPrefab(GameObject prefab)
         {
             if (!prefab) return;
@@ -548,31 +445,16 @@ namespace Coffee.UIExtensions
             SetParticleSystemInstance(Instantiate(prefab.gameObject), true);
         }
 
-        /// <summary>
-        /// Refresh UIParticle.
-        /// Collect ParticleSystems under the GameObject and refresh the UIParticle.
-        /// </summary>
         public void RefreshParticles()
         {
             RefreshParticles(gameObject);
         }
 
-        /// <summary>
-        /// Refresh UIParticle.
-        /// Collect ParticleSystems under the GameObject and refresh the UIParticle.
-        /// </summary>
         private void RefreshParticles(GameObject root)
         {
             if (!root) 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)
-                {
-                    particles.RemoveAt(i);
-                }
-            }
+            particles.RemoveAll(x => x.GetComponentInParent<UIParticle>(true) != this);
 
             for (var i = 0; i < particles.Count; i++)
             {
@@ -587,39 +469,31 @@ namespace Coffee.UIExtensions
             RefreshParticles(particles);
         }
 
-        /// <summary>
-        /// Refresh UIParticle using a list of ParticleSystems.
-        /// </summary>
-        public void RefreshParticles(List<ParticleSystem> particleSystems)
+        public void RefreshParticles(List<ParticleSystem> particles)
         {
-            // Collect children UIParticleRenderer components.
             // #246: Nullptr exceptions when using nested UIParticle components in hierarchy
             _renderers.Clear();
-            var childCount = transform.childCount;
-            for (var i = 0; i < childCount; i++)
+            foreach (Transform child in transform)
             {
-                var child = transform.GetChild(i);
-                if (child.TryGetComponent(out UIParticleRenderer uiParticleRenderer))
+                var uiParticleRenderer = child.GetComponent<UIParticleRenderer>();
+
+                if (uiParticleRenderer != null)
                 {
                     _renderers.Add(uiParticleRenderer);
                 }
             }
 
-            // Reset the UIParticleRenderer components.
             for (var i = 0; i < _renderers.Count; i++)
             {
                 _renderers[i].Reset(i);
             }
 
-            // Set the ParticleSystem to the UIParticleRenderer. If the trail is enabled, set it additionally.
             var j = 0;
-            for (var i = 0; i < particleSystems.Count; i++)
+            for (var i = 0; i < particles.Count; i++)
             {
-                var ps = particleSystems[i];
+                var ps = particles[i];
                 if (!ps) continue;
                 GetRenderer(j++).Set(this, ps, false);
-
-                // If the trail is enabled, set it additionally.
                 if (ps.trails.enabled)
                 {
                     GetRenderer(j++).Set(this, ps, true);
@@ -629,30 +503,12 @@ namespace Coffee.UIExtensions
 
         internal void UpdateTransformScale()
         {
-            _tracker.Clear();
             canvasScale = canvas.rootCanvas.transform.localScale.Inverse();
             parentScale = transform.parent.lossyScale;
-            if (autoScalingMode != AutoScalingMode.Transform)
-            {
-                if (_isScaleStored)
-                {
-                    transform.localScale = _storedScale;
-                }
+            if (autoScalingMode != AutoScalingMode.Transform) return;
 
-                _isScaleStored = false;
-                return;
-            }
-
-            var currentScale = transform.localScale;
-            if (!_isScaleStored)
-            {
-                _storedScale = currentScale.IsVisible() ? currentScale : Vector3.one;
-                _isScaleStored = true;
-            }
-
-            _tracker.Add(this, rectTransform, DrivenTransformProperties.Scale);
             var newScale = parentScale.Inverse();
-            if (currentScale != newScale)
+            if (transform.localScale != newScale)
             {
                 transform.localScale = newScale;
             }
@@ -665,10 +521,11 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < _renderers.Count; i++)
             {
                 var r = _renderers[i];
-                if (r) continue;
-
-                RefreshParticles(particles);
-                break;
+                if (!r)
+                {
+                    RefreshParticles(particles);
+                    break;
+                }
             }
 
             var bakeCamera = GetBakeCamera();
@@ -676,7 +533,6 @@ namespace Coffee.UIExtensions
             {
                 var r = _renderers[i];
                 if (!r) continue;
-
                 r.UpdateMesh(bakeCamera);
             }
         }
@@ -688,6 +544,17 @@ namespace Coffee.UIExtensions
                 : Random.Range(m_GroupId, m_GroupMaxId + 1);
         }
 
+        protected override void UpdateMaterial()
+        {
+        }
+
+        /// <summary>
+        /// Call to update the geometry of the Graphic onto the CanvasRenderer.
+        /// </summary>
+        protected override void UpdateGeometry()
+        {
+        }
+
         private void UpdateRendererMaterial()
         {
             for (var i = 0; i < _renderers.Count; i++)
@@ -717,55 +584,64 @@ namespace Coffee.UIExtensions
         private Camera GetBakeCamera()
         {
             if (!canvas) return Camera.main;
-            if (!useCustomView && canvas.renderMode != RenderMode.ScreenSpaceOverlay && canvas.rootCanvas.worldCamera)
+
+            // When render mode is ScreenSpaceCamera or WorldSpace, use world camera.
+            var root = canvas.rootCanvas;
+            if (root.renderMode != RenderMode.ScreenSpaceOverlay)
             {
-                return canvas.rootCanvas.worldCamera;
+                return root.worldCamera ? root.worldCamera : Camera.main;
             }
 
-            if (_bakeCamera)
+            // When render mode is ScreenSpaceOverlay, use ortho-camera.
+            if (!_orthoCamera)
             {
-                _bakeCamera.orthographicSize = useCustomView ? customViewSize : 10;
-                return _bakeCamera;
-            }
-
-            // Find existing baking camera.
-            var childCount = transform.childCount;
-            for (var i = 0; i < childCount; i++)
-            {
-                if (transform.GetChild(i).TryGetComponent<Camera>(out var cam)
-                    && cam.name == "[generated] UIParticle BakingCamera")
+                // Find existing ortho-camera.
+                foreach (Transform child in transform)
                 {
-                    _bakeCamera = cam;
-                    break;
+                    var cam = child.GetComponent<Camera>();
+                    if (cam && cam.name == "[generated] UIParticleOverlayCamera")
+                    {
+                        _orthoCamera = cam;
+                        break;
+                    }
+                }
+
+                // Create ortho-camera.
+                if (!_orthoCamera)
+                {
+                    var go = new GameObject("[generated] UIParticleOverlayCamera")
+                    {
+                        hideFlags = HideFlags.HideAndDontSave
+                    };
+                    go.SetActive(false);
+                    go.transform.SetParent(transform, false);
+                    _orthoCamera = go.AddComponent<Camera>();
+                    _orthoCamera.enabled = false;
                 }
             }
 
-            // Create baking camera.
-            if (!_bakeCamera)
+            //
+            var size = ((RectTransform)root.transform).rect.size;
+            _orthoCamera.orthographicSize = Mathf.Max(size.x, size.y) * root.scaleFactor;
+            _orthoCamera.transform.SetPositionAndRotation(new Vector3(0, 0, -1000), Quaternion.identity);
+            _orthoCamera.orthographic = true;
+            _orthoCamera.farClipPlane = 2000f;
+
+            return _orthoCamera;
+        }
+
+        private void UpdateTracker()
+        {
+#pragma warning disable CS0618 // Type or member is obsolete
+            if (!enabled || !autoScaling || autoScalingMode != AutoScalingMode.Transform)
+#pragma warning restore CS0618 // Type or member is obsolete
             {
-                var go = new GameObject("[generated] UIParticle BakingCamera");
-                go.SetActive(false);
-                go.transform.SetParent(transform, false);
-                _bakeCamera = go.AddComponent<Camera>();
+                _tracker.Clear();
+            }
+            else
+            {
+                _tracker.Add(this, rectTransform, DrivenTransformProperties.Scale);
             }
-
-            // Setup baking camera.
-            _bakeCamera.enabled = false;
-            _bakeCamera.orthographicSize = useCustomView ? customViewSize : 10;
-            _bakeCamera.transform.SetPositionAndRotation(new Vector3(0, 0, -1000), Quaternion.identity);
-            _bakeCamera.orthographic = true;
-            _bakeCamera.farClipPlane = 2000f;
-            _bakeCamera.clearFlags = CameraClearFlags.Nothing;
-            _bakeCamera.cullingMask = 0; // Nothing
-            _bakeCamera.allowHDR = false;
-            _bakeCamera.allowMSAA = false;
-            _bakeCamera.renderingPath = RenderingPath.Forward;
-            _bakeCamera.useOcclusionCulling = false;
-
-            _bakeCamera.gameObject.SetActive(false);
-            _bakeCamera.gameObject.hideFlags = UIParticleProjectSettings.globalHideFlags;
-
-            return _bakeCamera;
         }
     }
 }

Packages/src/Runtime/UIParticleAttractor.cs

@@ -0,0 +1,258 @@
+using System;
+using Coffee.UIParticleExtensions;
+using UnityEngine;
+using UnityEngine.Events;
+
+namespace Coffee.UIExtensions
+{
+    [ExecuteAlways]
+    public class UIParticleAttractor : MonoBehaviour
+    {
+        public enum Movement
+        {
+            Linear,
+            Smooth,
+            Sphere
+        }
+
+        public enum UpdateMode
+        {
+            Normal,
+            UnscaledTime
+        }
+
+        [SerializeField]
+        private ParticleSystem m_ParticleSystem;
+
+        [Range(0.1f, 10f)]
+        [SerializeField]
+        private float m_DestinationRadius = 1;
+
+        [Range(0f, 0.95f)]
+        [SerializeField]
+        private float m_DelayRate;
+
+        [Range(0.001f, 100f)]
+        [SerializeField]
+        private float m_MaxSpeed = 1;
+
+        [SerializeField]
+        private Movement m_Movement;
+
+        [SerializeField]
+        private UpdateMode m_UpdateMode;
+
+        [SerializeField]
+        private UnityEvent m_OnAttracted;
+
+        private UIParticle _uiParticle;
+
+        public float destinationRadius
+        {
+            get => m_DestinationRadius;
+            set => m_DestinationRadius = Mathf.Clamp(value, 0.1f, 10f);
+        }
+
+        public float delay
+        {
+            get => m_DelayRate;
+            set => m_DelayRate = value;
+        }
+
+        public float maxSpeed
+        {
+            get => m_MaxSpeed;
+            set => m_MaxSpeed = value;
+        }
+
+        public Movement movement
+        {
+            get => m_Movement;
+            set => m_Movement = value;
+        }
+
+        public UpdateMode updateMode
+        {
+            get => m_UpdateMode;
+            set => m_UpdateMode = value;
+        }
+
+        public UnityEvent onAttracted
+        {
+            get => m_OnAttracted;
+            set => m_OnAttracted = value;
+        }
+
+        /// <summary>
+        /// The target ParticleSystem to attract.
+        /// </summary>
+        public new ParticleSystem particleSystem
+        {
+            get => m_ParticleSystem;
+            set
+            {
+                m_ParticleSystem = value;
+                ApplyParticleSystem();
+            }
+        }
+
+        private void OnEnable()
+        {
+            ApplyParticleSystem();
+            UIParticleUpdater.Register(this);
+        }
+
+        private void OnDisable()
+        {
+            UIParticleUpdater.Unregister(this);
+        }
+
+        private void OnDestroy()
+        {
+            _uiParticle = null;
+            m_ParticleSystem = null;
+        }
+
+        internal void Attract()
+        {
+            if (m_ParticleSystem == null) return;
+
+            var count = m_ParticleSystem.particleCount;
+            if (count == 0) return;
+
+            var particles = ParticleSystemExtensions.GetParticleArray(count);
+            m_ParticleSystem.GetParticles(particles, count);
+
+            var dstPos = GetDestinationPosition();
+            for (var i = 0; i < count; i++)
+            {
+                // Attracted
+                var p = particles[i];
+                if (0f < p.remainingLifetime && Vector3.Distance(p.position, dstPos) < m_DestinationRadius)
+                {
+                    p.remainingLifetime = 0f;
+                    particles[i] = p;
+
+                    if (m_OnAttracted != null)
+                    {
+                        try
+                        {
+                            m_OnAttracted.Invoke();
+                        }
+                        catch (Exception e)
+                        {
+                            Debug.LogException(e);
+                        }
+                    }
+
+                    continue;
+                }
+
+                // Calc attracting time
+                var delayTime = p.startLifetime * m_DelayRate;
+                var duration = p.startLifetime - delayTime;
+                var time = Mathf.Max(0, p.startLifetime - p.remainingLifetime - delayTime);
+
+                // Delay
+                if (time <= 0) continue;
+
+                // Attract
+                p.position = GetAttractedPosition(p.position, dstPos, duration, time);
+                p.velocity *= 0.5f;
+                particles[i] = p;
+            }
+
+            m_ParticleSystem.SetParticles(particles, count);
+        }
+
+        private Vector3 GetDestinationPosition()
+        {
+            var isUI = _uiParticle && _uiParticle.enabled;
+            var psPos = m_ParticleSystem.transform.position;
+            var attractorPos = transform.position;
+            var dstPos = attractorPos;
+            var isLocalSpace = m_ParticleSystem.IsLocalSpace();
+
+            if (isLocalSpace)
+            {
+                dstPos = m_ParticleSystem.transform.InverseTransformPoint(dstPos);
+            }
+
+            if (isUI)
+            {
+                var inverseScale = _uiParticle.parentScale.Inverse();
+                var scale3d = _uiParticle.scale3DForCalc;
+                dstPos = dstPos.GetScaled(inverseScale, scale3d.Inverse());
+
+                // Relative mode
+                if (_uiParticle.positionMode == UIParticle.PositionMode.Relative)
+                {
+                    var diff = _uiParticle.transform.position - psPos;
+                    diff.Scale(scale3d - inverseScale);
+                    diff.Scale(scale3d.Inverse());
+                    dstPos += diff;
+                }
+
+#if UNITY_EDITOR
+                if (!Application.isPlaying && !isLocalSpace)
+                {
+                    dstPos += psPos - psPos.GetScaled(inverseScale, scale3d.Inverse());
+                }
+#endif
+            }
+
+            return dstPos;
+        }
+
+        private Vector3 GetAttractedPosition(Vector3 current, Vector3 target, float duration, float time)
+        {
+            var speed = m_MaxSpeed;
+            switch (m_UpdateMode)
+            {
+                case UpdateMode.Normal:
+                    speed *= 60 * Time.deltaTime;
+                    break;
+                case UpdateMode.UnscaledTime:
+                    speed *= 60 * Time.unscaledDeltaTime;
+                    break;
+            }
+
+            switch (m_Movement)
+            {
+                case Movement.Linear:
+                    speed /= duration;
+                    break;
+                case Movement.Smooth:
+                    target = Vector3.Lerp(current, target, time / duration);
+                    break;
+                case Movement.Sphere:
+                    target = Vector3.Slerp(current, target, time / duration);
+                    break;
+            }
+
+            return Vector3.MoveTowards(current, target, speed);
+        }
+
+        private void ApplyParticleSystem()
+        {
+            _uiParticle = null;
+            if (m_ParticleSystem == null)
+            {
+#if UNITY_EDITOR
+                if (Application.isPlaying)
+#endif
+                {
+                    Debug.LogError("No particle system attached to particle attractor script", this);
+                }
+
+                return;
+            }
+
+            _uiParticle = m_ParticleSystem.GetComponentInParent<UIParticle>(true);
+            if (_uiParticle && !_uiParticle.particles.Contains(m_ParticleSystem))
+            {
+                _uiParticle = null;
+            }
+        }
+    }
+}

Packages/src/Runtime/UIParticleAttractor.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 00e55ae1441ff4583859c55384964d86
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/src/Runtime/UIParticleRenderer.cs

@@ -6,7 +6,7 @@
 #endif
 using System;
 using System.Collections.Generic;
-using Coffee.UIParticleInternal;
+using Coffee.UIParticleExtensions;
 using UnityEditor;
 using UnityEngine;
 using UnityEngine.Profiling;
@@ -21,16 +21,18 @@ namespace Coffee.UIExtensions
     [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 Bounds _lastBounds;
-        private Material _materialForRendering;
         private Material _modifiedMaterial;
         private UIParticle _parent;
         private ParticleSystem _particleSystem;
@@ -38,7 +40,7 @@ namespace Coffee.UIExtensions
         private Vector3 _prevPsPos;
         private Vector3 _prevScale;
         private Vector2Int _prevScreenSize;
-        private bool _preWarm;
+        private bool _prewarm;
         private ParticleSystemRenderer _renderer;
 
         public override Texture mainTexture => _isTrail ? null : _particleSystem.GetTextureForSprite();
@@ -89,19 +91,6 @@ namespace Coffee.UIExtensions
             }
         }
 
-        public override Material materialForRendering
-        {
-            get
-            {
-                if (!_materialForRendering)
-                {
-                    _materialForRendering = base.materialForRendering;
-                }
-
-                return _materialForRendering;
-            }
-        }
-
         public void Reset(int index = -1)
         {
             if (_renderer)
@@ -121,14 +110,16 @@ namespace Coffee.UIExtensions
             if (this && isActiveAndEnabled)
             {
                 material = null;
-                canvasRenderer.Clear();
+                workerMesh.Clear();
+                canvasRenderer.SetMesh(workerMesh);
                 _lastBounds = new Bounds();
                 enabled = false;
             }
             else
             {
-                MaterialRepository.Release(ref _modifiedMaterial);
-                _materialForRendering = null;
+                ModifiedMaterial.Remove(_modifiedMaterial);
+                _modifiedMaterial = null;
+                _currentMaterialForRendering = null;
             }
         }
 
@@ -136,7 +127,6 @@ namespace Coffee.UIExtensions
         {
             base.OnEnable();
 
-            hideFlags = UIParticleProjectSettings.globalHideFlags;
             if (!s_CombineInstances[0].mesh)
             {
                 s_CombineInstances[0].mesh = new Mesh
@@ -145,15 +135,17 @@ namespace Coffee.UIExtensions
                     hideFlags = HideFlags.HideAndDontSave
                 };
             }
+
+            _currentMaterialForRendering = null;
         }
 
         protected override void OnDisable()
         {
             base.OnDisable();
 
-            MaterialRepository.Release(ref _modifiedMaterial);
-            _materialForRendering = null;
-            _isPrevStored = false;
+            ModifiedMaterial.Remove(_modifiedMaterial);
+            _modifiedMaterial = null;
+            _currentMaterialForRendering = null;
         }
 
         public static UIParticleRenderer AddRenderer(UIParticle parent, int index)
@@ -161,7 +153,7 @@ namespace Coffee.UIExtensions
             // Create renderer object.
             var go = new GameObject("[generated] UIParticleRenderer", typeof(UIParticleRenderer))
             {
-                hideFlags = UIParticleProjectSettings.globalHideFlags,
+                hideFlags = HideFlags.HideAndDontSave,
                 layer = parent.gameObject.layer
             };
 
@@ -185,9 +177,12 @@ namespace Coffee.UIExtensions
         /// </summary>
         public override Material GetModifiedMaterial(Material baseMaterial)
         {
+            _currentMaterialForRendering = null;
+
             if (!IsActive() || !_parent)
             {
-                MaterialRepository.Release(ref _modifiedMaterial);
+                ModifiedMaterial.Remove(_modifiedMaterial);
+                _modifiedMaterial = null;
                 return baseMaterial;
             }
 
@@ -197,30 +192,23 @@ namespace Coffee.UIExtensions
             var texture = mainTexture;
             if (texture == null && _parent.m_AnimatableProperties.Length == 0)
             {
-                MaterialRepository.Release(ref _modifiedMaterial);
+                ModifiedMaterial.Remove(_modifiedMaterial);
+                _modifiedMaterial = null;
                 return modifiedMaterial;
             }
 
-            var hash = new Hash128(
-                modifiedMaterial ? (uint)modifiedMaterial.GetInstanceID() : 0,
-                texture ? (uint)texture.GetInstanceID() : 0,
-                0 < _parent.m_AnimatableProperties.Length ? (uint)GetInstanceID() : 0,
+            //
+            var id = _parent.m_AnimatableProperties.Length == 0 ? 0 : GetInstanceID();
 #if UNITY_EDITOR
-                (uint)EditorJsonUtility.ToJson(modifiedMaterial).GetHashCode()
+            var props = EditorJsonUtility.ToJson(modifiedMaterial).GetHashCode();
 #else
-                0
+            var props = 0;
 #endif
-            );
-            if (!MaterialRepository.Valid(hash, _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));
-            }
+            modifiedMaterial = ModifiedMaterial.Add(modifiedMaterial, texture, id, props);
+            ModifiedMaterial.Remove(_modifiedMaterial);
+            _modifiedMaterial = modifiedMaterial;
 
-            return _modifiedMaterial;
+            return modifiedMaterial;
         }
 
         public void Set(UIParticle parent, ParticleSystem ps, bool isTrail)
@@ -231,20 +219,20 @@ namespace Coffee.UIExtensions
             gameObject.layer = parent.gameObject.layer;
 
             _particleSystem = ps;
-            _preWarm = _particleSystem.main.prewarm;
+            _prewarm = _particleSystem.main.prewarm;
 
 #if UNITY_EDITOR
             if (Application.isPlaying)
 #endif
             {
-                if (_particleSystem.isPlaying || _preWarm)
+                if (_particleSystem.isPlaying || _prewarm)
                 {
                     _particleSystem.Clear();
                     _particleSystem.Pause();
                 }
             }
 
-            ps.TryGetComponent(out _renderer);
+            _renderer = ps.GetComponent<ParticleSystemRenderer>();
             _renderer.enabled = false;
 
             //_emitter = emitter;
@@ -340,16 +328,7 @@ namespace Coffee.UIExtensions
 
             // Bake mesh.
             Profiler.BeginSample("[UIParticleRenderer] Bake Mesh");
-            s_CombineInstances[0].mesh.Clear(false);
-
-            // Assertion failed on expression: 'ps->array_size()' #278
-            var extends = s_CombineInstances[0].mesh.bounds.extents.x;
-            if (!float.IsNaN(extends) && !float.IsInfinity(extends) && 0 < extends)
-            {
-                s_CombineInstances[0].mesh.RecalculateBounds();
-            }
-
-            if (_isTrail && _parent.canSimulate && 0 < _particleSystem.particleCount)
+            if (_isTrail && _parent.canSimulate && 0 < s_CombineInstances[0].mesh.vertexCount)
             {
 #if PS_BAKE_API_V2
                 _renderer.BakeTrailsMesh(s_CombineInstances[0].mesh, bakeCamera,
@@ -358,7 +337,7 @@ namespace Coffee.UIExtensions
                 _renderer.BakeTrailsMesh(s_CombineInstances[0].mesh, bakeCamera, true);
 #endif
             }
-            else if (!_isTrail && _renderer.CanBakeMesh())
+            else if (_renderer.CanBakeMesh())
             {
                 _particleSystem.ValidateShape();
 #if PS_BAKE_API_V2
@@ -368,10 +347,15 @@ namespace Coffee.UIExtensions
                 _renderer.BakeMesh(s_CombineInstances[0].mesh, bakeCamera, true);
 #endif
             }
+            else
+            {
+                s_CombineInstances[0].mesh.Clear(false);
+            }
 
             // Too many vertices to render.
             if (65535 <= s_CombineInstances[0].mesh.vertexCount)
             {
+                s_CombineInstances[0].mesh.Clear(false);
                 Debug.LogErrorFormat(this,
                     "Too many vertices to render. index={0}, isTrail={1}, vertexCount={2}(>=65535)",
                     _index,
@@ -416,67 +400,95 @@ namespace Coffee.UIExtensions
                 _lastBounds = bounds;
 
                 // Convert linear color to gamma color.
-                if (UIParticleProjectSettings.enableLinearToGamma && canvas.ShouldGammaToLinearInMesh())
+                if (QualitySettings.activeColorSpace == ColorSpace.Linear)
                 {
-                    workerMesh.LinearToGamma();
+                    Profiler.BeginSample("[UIParticleRenderer] Convert Linear to Gamma");
+                    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();
                 }
 
-                var components = ListPool<Component>.Rent();
-                GetComponents(typeof(IMeshModifier), components);
-                for (var i = 0; i < components.Count; i++)
+                GetComponents(typeof(IMeshModifier), s_Components);
+                for (var i = 0; i < s_Components.Count; i++)
                 {
 #pragma warning disable CS0618 // Type or member is obsolete
-                    ((IMeshModifier)components[i]).ModifyMesh(workerMesh);
+                    ((IMeshModifier)s_Components[i]).ModifyMesh(workerMesh);
 #pragma warning restore CS0618 // Type or member is obsolete
                 }
 
-                ListPool<Component>.Return(ref components);
+                s_Components.Clear();
             }
 
             Profiler.EndSample();
 
-            // Update animatable material properties.
-            Profiler.BeginSample("[UIParticleRenderer] Update Animatable Material Properties");
-            UpdateMaterialProperties();
-            Profiler.EndSample();
 
             // Get grouped renderers.
-            Profiler.BeginSample("[UIParticleRenderer] Set Mesh");
-            var renderers = ListPool<UIParticleRenderer>.Rent();
+            s_Renderers.Clear();
             if (_parent.useMeshSharing)
             {
-                UIParticleUpdater.GetGroupedRenderers(_parent.groupId, _index, renderers);
+                UIParticleUpdater.GetGroupedRenderers(_parent.groupId, _index, s_Renderers);
             }
 
-            for (var i = 0; i < renderers.Count; i++)
+            // Set mesh to the CanvasRenderer.
+            Profiler.BeginSample("[UIParticleRenderer] Set Mesh");
+            for (var i = 0; i < s_Renderers.Count; i++)
             {
-                var r = renderers[i];
-                if (r == this) continue;
-
-                r.canvasRenderer.SetMesh(workerMesh);
-                r._lastBounds = _lastBounds;
-                r.canvasRenderer.materialCount = 1;
-                r.canvasRenderer.SetMaterial(materialForRendering, 0);
+                if (s_Renderers[i] == this) continue;
+                s_Renderers[i].canvasRenderer.SetMesh(workerMesh);
+                s_Renderers[i]._lastBounds = _lastBounds;
             }
 
-            ListPool<UIParticleRenderer>.Return(ref renderers);
-
-            if (_parent.canRender)
-            {
-                canvasRenderer.SetMesh(workerMesh);
-            }
-            else
+            if (!_parent.canRender)
             {
                 workerMesh.Clear();
             }
 
+            canvasRenderer.SetMesh(workerMesh);
             Profiler.EndSample();
-        }
 
-        public override void SetMaterialDirty()
-        {
-            _materialForRendering = null;
-            base.SetMaterialDirty();
+            // 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();
+            if (_parent.useMeshSharing)
+            {
+                if (!_currentMaterialForRendering)
+                {
+                    _currentMaterialForRendering = materialForRendering;
+                }
+
+                for (var i = 0; i < s_Renderers.Count; i++)
+                {
+                    if (s_Renderers[i] == this) continue;
+
+                    s_Renderers[i].canvasRenderer.materialCount = 1;
+                    s_Renderers[i].canvasRenderer.SetMaterial(_currentMaterialForRendering, 0);
+                }
+            }
+
+            Profiler.EndSample();
+
+            s_Renderers.Clear();
         }
 
         /// <summary>
@@ -505,10 +517,9 @@ namespace Coffee.UIExtensions
             var scale = _parent.scale3DForCalc.GetScaled(_parent.parentScale);
 
             if (_parent.autoScalingMode == UIParticle.AutoScalingMode.UIParticle
-                && _particleSystem.main.scalingMode == ParticleSystemScalingMode.Local
-                && _parent.canvas)
+                && _particleSystem.main.scalingMode == ParticleSystemScalingMode.Local)
             {
-                scale = scale.GetScaled(_parent.canvas.rootCanvas.transform.localScale);
+                scale = scale.GetScaled(_parent.canvas.transform.localScale);
             }
 
             Profiler.EndSample();
@@ -545,7 +556,10 @@ namespace Coffee.UIExtensions
                     return Matrix4x4.Scale(scale);
                 case ParticleSystemSimulationSpace.Custom:
                     return Matrix4x4.Translate(_particleSystem.main.customSimulationSpace.position.GetScaled(scale))
-                           * Matrix4x4.Scale(scale);
+                           //* Matrix4x4.Translate(wpos)
+                           * Matrix4x4.Scale(scale)
+                        //* Matrix4x4.Translate(-wpos)
+                        ;
                 default:
                     throw new NotSupportedException();
             }
@@ -561,16 +575,15 @@ namespace Coffee.UIExtensions
             var screenSize = new Vector2Int(Screen.width, Screen.height);
             var isWorldSpace = _particleSystem.IsWorldSpace();
             var canvasScale = _parent.canvas ? _parent.canvas.scaleFactor : 1f;
-            var resolutionChanged = _prevScreenSize != screenSize
-                                    || !Mathf.Approximately(_prevCanvasScale, canvasScale);
-            if (resolutionChanged && isWorldSpace && _isPrevStored)
+            var resolutionChanged = _prevScreenSize != screenSize || _prevCanvasScale != canvasScale;
+            if (resolutionChanged && isWorldSpace)
             {
                 // Update particle array size and get particles.
                 var size = _particleSystem.particleCount;
                 var particles = ParticleSystemExtensions.GetParticleArray(size);
                 _particleSystem.GetParticles(particles, size);
 
-                // Resolution resolver:
+                // Resolusion resolver:
                 // (psPos / scale) / (prevPsPos / prevScale) -> psPos * scale.inv * prevPsPos.inv * prevScale
                 var modifier = psPos.GetScaled(
                     scale.Inverse(),
@@ -589,7 +602,6 @@ namespace Coffee.UIExtensions
                 _delay = true;
                 _prevScale = scale;
                 _prevPsPos = psPos;
-                _isPrevStored = true;
             }
 
             _prevCanvasScale = canvas ? canvas.scaleFactor : 1f;
@@ -605,25 +617,23 @@ namespace Coffee.UIExtensions
                     ? Time.unscaledDeltaTime
                     : Time.deltaTime;
 
-            // Pre-warm:
-            if (0 < deltaTime && _preWarm)
+            // Prewarm:
+            if (0 < deltaTime && _prewarm)
             {
                 deltaTime += main.duration;
-                _preWarm = false;
+                _prewarm = false;
             }
 
             // get world position.
             var isLocalSpace = _particleSystem.IsLocalSpace();
             var psTransform = _particleSystem.transform;
-            var originLocalPosition = psTransform.localPosition;
-            var originLocalRotation = psTransform.localRotation;
             var originWorldPosition = psTransform.position;
             var originWorldRotation = psTransform.rotation;
             var emission = _particleSystem.emission;
             var rateOverDistance = emission.enabled
                                    && 0 < emission.rateOverDistance.constant
                                    && 0 < emission.rateOverDistanceMultiplier;
-            if (rateOverDistance && !paused && _isPrevStored)
+            if (rateOverDistance && !paused)
             {
                 // (For rate-over-distance emission,) Move to previous scaled position, simulate (delta = 0).
                 var prevScaledPos = isLocalSpace
@@ -639,8 +649,7 @@ namespace Coffee.UIExtensions
                 : originWorldPosition.GetScaled(scale.Inverse());
             psTransform.SetPositionAndRotation(scaledPos, originWorldRotation);
             _particleSystem.Simulate(deltaTime, false, false, false);
-            psTransform.localPosition = originLocalPosition;
-            psTransform.localRotation = originLocalRotation;
+            psTransform.SetPositionAndRotation(originWorldPosition, originWorldRotation);
         }
 
 #if UNITY_EDITOR
@@ -684,12 +693,12 @@ namespace Coffee.UIExtensions
             if (s_Mpb.isEmpty) return;
 
             // #41: Copy the value from MaterialPropertyBlock to CanvasRenderer
-            if (!materialForRendering) return;
+            if (!_modifiedMaterial) return;
 
             for (var i = 0; i < _parent.m_AnimatableProperties.Length; i++)
             {
                 var ap = _parent.m_AnimatableProperties[i];
-                ap.UpdateMaterialProperties(materialForRendering, s_Mpb);
+                ap.UpdateMaterialProperties(_modifiedMaterial, s_Mpb);
             }
 
             s_Mpb.Clear();

Packages/src/Runtime/UIParticleRenderer.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 0e66d2d1ba43c4cc4bc3e754e403297b
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
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