chore(release): 4.12.0 [skip ci]

# [4.12.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.4...v4.12.0) (2026-03-24)

### Features

* explicit null checks ([5384f61](5384f61c56))

.github/workflows/release.yml

@@ -1,12 +1,12 @@
 name: 🔖 Release
+run-name: 🔖 Release (${{ github.ref_name }})
 
 on:
   workflow_dispatch:
   push:
     branches:
       - release
-      - release-preview
+      - release-*
-      - release-v4
     tags-ignore:
       - "**"
 
@@ -27,10 +27,10 @@ jobs:
       split_to: ${{ steps.summary.outputs.split_to }}
     steps:
       - name: 🚚 Checkout (${{ github.ref_name }})
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: 🔖 Run semantic release
-        uses: cycjimmy/semantic-release-action@v4
+        uses: cycjimmy/semantic-release-action@v5
         id: release
         with:
           working_directory: Packages/src
@@ -38,7 +38,7 @@ jobs:
             @semantic-release/changelog
             @semantic-release/git
         env:
-          GITHUB_TOKEN: ${{ github.token }}
+          GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
 
       - id: summary
         run: |
@@ -50,14 +50,12 @@ jobs:
           if [ '${{ steps.release.outputs.new_release_published }}' = 'false' ]; then
             echo "No new release published." | tee -a $GITHUB_STEP_SUMMARY
           elif [ '${{ github.ref_name }}' = 'release' ]; then
-            echo "merge_to=develop" | tee -a $GITHUB_OUTPUT
+            echo "merge_to=develop" | tee -a $GITHUB_OUTPUT $GITHUB_STEP_SUMMARY
-            echo "split_to=main" | tee -a $GITHUB_OUTPUT
+            echo "split_to=main" | tee -a $GITHUB_OUTPUT $GITHUB_STEP_SUMMARY
-          elif [ '${{ github.ref_name }}' = 'release-preview' ]; then
+          else
-            echo "merge_to=develop-preview" | tee -a $GITHUB_OUTPUT
+            channel=$(echo ${{ github.ref_name }} | sed 's/^release-//')
-            echo "split_to=preview" | tee -a $GITHUB_OUTPUT
+            echo "merge_to=develop-${channel}" | tee -a $GITHUB_OUTPUT $GITHUB_STEP_SUMMARY
-          elif [ '${{ github.ref_name }}' = 'release-4.x' ]; then
+            echo "split_to=${channel}" | tee -a $GITHUB_OUTPUT $GITHUB_STEP_SUMMARY
-            echo "merge_to=develop-4.x" | tee -a $GITHUB_OUTPUT
-            echo "split_to=4.x" | tee -a $GITHUB_OUTPUT
           fi
 
   merge-to:
@@ -69,7 +67,7 @@ jobs:
       contents: write
     steps:
       - name: 🚚 Checkout (${{ needs.release.outputs.merge_to }})
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: ${{ needs.release.outputs.merge_to }}
           fetch-depth: 0
@@ -90,7 +88,7 @@ jobs:
       contents: write
     steps:
       - name: 🚚 Checkout (${{ needs.release.outputs.tag }})
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: ${{ needs.release.outputs.tag }}
           fetch-depth: 0

.github/workflows/test.yml

@@ -3,28 +3,37 @@
 #   UNITY_EMAIL: Unity user email to login
 #   UNITY_PASSWORD: Unity user password to login
 name: 🧪 Test
+run-name: 🧪 Test (${{ github.event.pull_request.title || github.ref_name }})
 
 env:
   # MINIMUM_VERSION: The minimum version of Unity.
   MINIMUM_VERSION: 2019.4
   # EXCLUDE_FILTER: The excluded versions of Unity.
-  EXCLUDE_FILTER: '(2020.2.0)'
+  EXCLUDE_FILTER: "(2020.2.0|2021.1|2023.3)"
+  PROJECT_PATH: .
 
 on:
   workflow_dispatch:
+    inputs:
+      usePeriodVersions:
+        description: "Use the period versions (.0f1, .10f1, 20f1, ...)."
+        required: false
+        default: "true"
   push:
     branches:
       - develop
-      - develop-preview
+      - "develop-*"
-      - develop-4.x
     tags:
       - "!*"
     paths-ignore:
-      - "*.md"
+      - "**.md"
-  pull_request:
+  pull_request_target:
     types:
       - opened
+      - reopened
       - synchronize
+    paths-ignore:
+      - "**.md"
 
 jobs:
   setup:
@@ -37,9 +46,12 @@ jobs:
         id: setup
         run: |
           echo "==== Target Unity Versions ===="
-          LATEST_VERSIONS=`npx unity-changeset list --versions --latest-patch --min ${MINIMUM_VERSION} --json --all`
+          LATEST_VERSIONS=`npx unity-changeset@latest list --versions --latest-patch --min ${MINIMUM_VERSION} --json --all`
-          # ADDITIONAL_VERSIONS=`npx unity-changeset list --versions --grep '0f' --min ${MINIMUM_VERSION} --json`
+          if [ "${{ inputs.usePeriodVersions }}" = "true" ]; then
-          ADDITIONAL_VERSIONS=[]
+            ADDITIONAL_VERSIONS=`npx unity-changeset list --versions --grep '0f' --min ${MINIMUM_VERSION} --json`
+          else
+            ADDITIONAL_VERSIONS=[]
+          fi
 
           VERSIONS=`echo "[${LATEST_VERSIONS}, ${ADDITIONAL_VERSIONS}]" \
             | jq -c '[ flatten | sort | unique | .[] | select( test("${{ env.EXCLUDE_FILTER }}") | not ) ]'`
@@ -48,40 +60,57 @@ jobs:
   test:
     name: 🧪 Run tests
     runs-on: ubuntu-latest
-    env:
-      UNITY_EMAIL: ${{ secrets.UNITY_EMAIL }}
-      UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
-      UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
     permissions:
       checks: write
       contents: read
     needs: setup
     strategy:
       fail-fast: false
-      max-parallel: 4
+      max-parallel: 6
       matrix:
         unityVersion: ${{ fromJson(needs.setup.outputs.unityVersions) }}
     steps:
-      - name: 🚚 Checkout
+      - name: 🚚 Checkout ($${{ github.ref }})
-        uses: actions/checkout@v4
+        if: github.event_name == 'push'
+        uses: actions/checkout@v5
+
+      - name: 🚚 Checkout pull request (pull_request_target)
+        if: github.event_name == 'pull_request_target'
+        uses: actions/checkout@v5
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 0
+
+      - name: 🚚 Marge pull request (pull_request_target)
+        if: github.event_name == 'pull_request_target'
+        run: |
+          git config user.name "GitHub Actions"
+          git config user.email "actions@github.com"
+          git rebase ${{ github.event.pull_request.base.sha }}
+          git log --oneline -n 10
 
       - name: 📥 Cache library
         uses: actions/cache@v4
         with:
-          path: Library
+          path: ${{ env.PROJECT_PATH }}/Library
-          key: Library-${{ matrix.unityVersion }}-${{ github.sha }}
+          key: ${{ env.PROJECT_PATH }}-Library-${{ matrix.unityVersion }}-${{ github.event.pull_request.head.sha || github.sha }}
           restore-keys: |
-            Library-${{ matrix.unityVersion }}-
+            ${{ env.PROJECT_PATH }}-Library-${{ matrix.unityVersion }}-
-            Library-
+            ${{ env.PROJECT_PATH }}-Library-
 
-      - name: 🛠️ Build Unity Project
+      - name: 🛠️ Build Unity Project (Test)
-        uses: game-ci/unity-builder@v4
+        uses: game-ci/unity-builder@main
         timeout-minutes: 45
         with:
           customImage: ghcr.io/mob-sakai/unity3d:${{ matrix.unityVersion }}
           targetPlatform: StandaloneLinux64
           allowDirtyBuild: true
           customParameters: -nographics
+          projectPath: ${{ env.PROJECT_PATH }}
+        env:
+          UNITY_EMAIL: ${{ secrets.UNITY_EMAIL }}
+          UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
 
       - name: 🧪 Run tests
         uses: game-ci/unity-test-runner@v4
@@ -92,4 +121,8 @@ jobs:
           customParameters: -nographics
           checkName: ${{ matrix.unityVersion }} Test Results
           githubToken: ${{ github.token }}
-          coverageOptions: "dontClear;generateHtmlReport;generateBadgeReport;pathFilters:+**/Packages/src/**;assemblyFilters:+<packages>,-*.Editor,-*.Test"
+          projectPath: ${{ env.PROJECT_PATH }}
+        env:
+          UNITY_EMAIL: ${{ secrets.UNITY_EMAIL }}
+          UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}

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

@@ -0,0 +1,4 @@
+fileFormatVersion: 2
+guid: e34a092899a9547189add96707de1b5a
+DefaultImporter:
+  userData: 

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

@@ -80,7 +80,11 @@ namespace Coffee.UIExtensions.Demo
                 .SelectMany(x => x.GetTypes())
                 .FirstOrDefault(x => x.Name == typeName);
 
+#if UNITY_2023_2_OR_NEWER
+            return type == null ? null : FindFirstObjectByType(type);
+#else
             return type == null ? null : FindObjectOfType(type);
+#endif
         }
 
         public void SetCanvasWidth(int width)

Assets/Demo/Performance Demo/Scripts/UIParticle_PerformanceDemo.cs

@@ -1,3 +1,4 @@
+using Coffee.UIParticleInternal;
 using UnityEngine;
 using UnityEngine.Serialization;
 
@@ -46,11 +47,7 @@ namespace Coffee.UIExtensions.Demo
 
             if (!flag)
             {
-#if UNITY_2023_1_OR_NEWER
+                foreach (var ps in Misc.FindObjectsOfType<ParticleSystem>())
-                foreach (var ps in FindObjectsByType<ParticleSystem>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-                foreach (var ps in FindObjectsOfType<ParticleSystem>())
-#endif
                 {
                     ps.Play(false);
                 }
@@ -79,11 +76,7 @@ namespace Coffee.UIExtensions.Demo
 
         public void ParticleSystem_SetScale(float scale)
         {
-#if UNITY_2023_1_OR_NEWER
+            foreach (var ps in Misc.FindObjectsOfType<ParticleSystem>())
-            foreach (var ps in FindObjectsByType<ParticleSystem>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-            foreach (var ps in FindObjectsOfType<ParticleSystem>())
-#endif
             {
                 ps.transform.localScale = new Vector3(scale, scale, scale);
             }

Assets/ProjectSettings/NanoMonitor.asset

@@ -18,11 +18,12 @@ MonoBehaviour:
   m_EnabledInEditor: 1
   m_AlwaysIncludeAssembly: 1
   m_InstantiateOnLoad: 1
-  m_Prefab: {fileID: 7211429669315726685, guid: b73940fc30a2f4eb9a73783e9c1f8da6,
+  m_Prefab: {fileID: 4567906826058368312, guid: 7cebff2d255b9433cbe23b243c193329,
     type: 3}
   m_Interval: 0.5
   m_Anchor: 0
   m_Width: 750
+  m_HelpUrl: https://github.com/mob-sakai/ParticleEffectForUGUI
   m_CustomMonitorItems:
   - m_Format: Screen:{0}x{1}
     m_Arg0:

Assets/ProjectSettings/NanoMonitor.prefab.meta

@@ -1,7 +0,0 @@
-fileFormatVersion: 2
-guid: b73940fc30a2f4eb9a73783e9c1f8da6
-PrefabImporter:
-  externalObjects: {}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

Assets/ProjectSettings/UIParticleProjectSettings.asset

@@ -10,6 +10,7 @@ MonoBehaviour:
   m_Enabled: 1
   m_EditorHideFlags: 0
   m_Script: {fileID: 11500000, guid: f22a23b9d98e440478697f4adf30e61c, type: 3}
-  m_Name: UIParticle
+  m_Name: UIParticleProjectSettings
   m_EditorClassIdentifier: 
-  m_LinearToGamma: 1
+  m_EnableLinearToGamma: 1
+  m_HideGeneratedObjects: 1

Assets/ProjectSettings/UIParticleProjectSettings.asset.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: e8e7744b163af4869b07b8f192c810ed
+guid: a5b9278dfbd194d04b1c6ae7031928c1
 NativeFormatImporter:
   externalObjects: {}
   mainObjectFileID: 11400000

Assets/Tests/Editor/NewTestScript.cs

@@ -1,16 +1,21 @@
 using System.Collections;
+using Coffee.UIParticleInternal;
 using NUnit.Framework;
+using UnityEngine;
 using UnityEngine.TestTools;
 
 namespace Coffee.UIParticle.Editor.Tests
 {
     public class NewTestScript
     {
-        // A Test behaves as an ordinary method
+        [TestCase(-1)]
-        [Test]
+        [TestCase(0)]
-        public void NewTestScriptSimplePasses()
+        [TestCase(2048)]
+        [TestCase(3000)]
+        public void GetParticleArray(int requiredSize)
         {
-            // Use the Assert class to test conditions
+            var array = ParticleSystemExtensions.GetParticleArray(requiredSize);
+            Debug.Log($"requiredSize: {requiredSize}, array.Length: {array.Length}");
         }
 
         // A UnityTest behaves like a coroutine in Play Mode. In Edit Mode you can use

Packages/manifest.json

@@ -1,9 +1,9 @@
 {
   "dependencies": {
-    "com.unity.ide.rider": "3.0.31",
     "com.coffee.development": "https://github.com/mob-sakai/Coffee.Internal.git?path=Packages/Development",
+    "com.coffee.minimal-resource": "https://github.com/mob-sakai/Coffee.Internal.git?path=Packages/MinimalResource",
     "com.coffee.nano-monitor": "https://github.com/mob-sakai/Coffee.Internal.git?path=Packages/NanoMonitor",
-    "com.coffee.sub-asset-editor": "https://github.com/mob-sakai/SubAssetEditor.git",
+    "com.unity.ide.rider": "3.0.31",
     "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

@@ -5,7 +5,14 @@
       "depth": 0,
       "source": "git",
       "dependencies": {},
-      "hash": "c51e4514c9ab944915a639433ee52342e55a644e"
+      "hash": "3c280f1a8f4db5038b881ff07f270efd9638fa31"
+    },
+    "com.coffee.minimal-resource": {
+      "version": "https://github.com/mob-sakai/Coffee.Internal.git?path=Packages/MinimalResource",
+      "depth": 0,
+      "source": "git",
+      "dependencies": {},
+      "hash": "3c280f1a8f4db5038b881ff07f270efd9638fa31"
     },
     "com.coffee.nano-monitor": {
       "version": "https://github.com/mob-sakai/Coffee.Internal.git?path=Packages/NanoMonitor",
@@ -14,14 +21,7 @@
       "dependencies": {
         "com.unity.ugui": "1.0.0"
       },
-      "hash": "c51e4514c9ab944915a639433ee52342e55a644e"
+      "hash": "3c280f1a8f4db5038b881ff07f270efd9638fa31"
-    },
-    "com.coffee.sub-asset-editor": {
-      "version": "https://github.com/mob-sakai/SubAssetEditor.git",
-      "depth": 0,
-      "source": "git",
-      "dependencies": {},
-      "hash": "01464178eec1e4dbe741c11c9baeb94a151c99ee"
     },
     "com.coffee.ui-particle": {
       "version": "file:src",

Packages/src/CHANGELOG.md

@@ -1,3 +1,119 @@
+# [4.12.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.4...v4.12.0) (2026-03-24)
+
+
+### Features
+
+* explicit null checks ([5384f61](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/5384f61c569e9f78ff9d5b45acfc6f5c2f021a87))
+
+## [4.11.4](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.3...v4.11.4) (2025-12-24)
+
+
+### Bug Fixes
+
+* add early return for case where subEmitter module is disabled ([d1386a1](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/d1386a12216743a6e09f1b9b87bea1dfcf7702e4))
+* avoid endless loop ([eb2e862](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/eb2e862e80e549c8cf16ddfed776c101c2413bac)), closes [#392](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/392)
+
+## [4.11.3](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.2...v4.11.3) (2025-10-14)
+
+
+### Bug Fixes
+
+* fix icon ([a9461ec](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/a9461ecb4d40d7fe878e12465d6e38faae7ae65b))
+* fix URL link in README ([1c8c65d](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/1c8c65d25e7f6fe7b1d20da4461333df8fc7578e)), closes [#376](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/376)
+* fix: second and subsequent bursts not displayed when world simulation and non-looping ([df2f3ca](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/df2f3caafbe279f1457d74f8183cb561ac14aa17)), closes [#326](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/326)
+* UIParticle in canvas with 0f-0.01f alpha value does not start to play until alpha value is greater than 0.01f, causes play calls to be delayed unintentionally if canvas alpha value is set to mentioned value range ([38aec2e](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/38aec2ea1afd77677d629c86665a3342d92e49d9))
+
+## [4.11.2](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.1...v4.11.2) (2025-03-15)
+
+
+### Bug Fixes
+
+* IL2CPP build fails on older versions of Unity ([0da6525](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/0da652520cd165b43de7404c0b0ab1fbcf9349d1))
+* NRE on enable ([0cff50e](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/0cff50ef696aa53fb7c46a9a737b7cf3a05b7b9b)), closes [#359](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/359)
+
+## [4.11.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.0...v4.11.1) (2025-02-21)
+
+
+### Bug Fixes
+
+* component icons will no longer be displayed in the scene view ([6dfbdae](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/6dfbdae38d3822ab9c2c6f0e4ca1ca32ee98a239))
+
+# [4.11.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.7...v4.11.0) (2025-02-21)
+
+
+### Features
+
+* add 'TimeScaleMultiplier' option ([925af0b](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/925af0b6046f65f23a778f67cefa8ff9cbedb513))
+
+## [4.10.7](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.6...v4.10.7) (2025-01-14)
+
+
+### Bug Fixes
+
+* editor crashed on exit play mode (editor, windows) ([47ee45c](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/47ee45cbbe651a8f87ca2b8a3948f8b88db8211e)), closes [#351](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/351)
+
+## [4.10.6](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.5...v4.10.6) (2025-01-03)
+
+
+### Bug Fixes
+
+* sub-emitter particles may not render correctly in certain scenarios ([8276684](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/8276684c3b1646f0490ed64557547ba15281664a)), closes [#348](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/348)
+* sub-emitter's `inherit velocity` module doubles at runtime ([67de3d1](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/67de3d1bd3e16dc9b564625cb990c53d75769506)), closes [#349](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/349)
+
+## [4.10.5](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.4...v4.10.5) (2024-12-23)
+
+
+### Bug Fixes
+
+* '3D' scale toggle in the inspector does not keep on reload ([934f4b8](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/934f4b8f1c61f8ff20228d0ebcea9f636a3758ed)), closes [#346](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/346)
+
+## [4.10.4](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.3...v4.10.4) (2024-12-19)
+
+
+### Bug Fixes
+
+* rendering issues when playing with opening a prefab stage ([95235a9](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/95235a929b82cf681365ed6eba837d857f83e3d2)), closes [#345](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/345)
+
+## [4.10.3](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.2...v4.10.3) (2024-11-20)
+
+
+### Bug Fixes
+
+* if not configured as a preloaded asset, the project settings asset will be regenerated ([abe0948](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/abe09485f65dd4efd18e74675e752e0213bdf3be)), closes [#342](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/342)
+
+## [4.10.2](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.1...v4.10.2) (2024-11-01)
+
+
+### Bug Fixes
+
+* trail incorrect offset ([afe00a1](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/afe00a1dde80eb1c0a7bb668b75f4c3733d3fa43)), closes [#335](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/335)
+
+## [4.10.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.10.0...v4.10.1) (2024-09-29)
+
+
+### Bug Fixes
+
+* mainTex will be ignored ([2ee69d0](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/2ee69d04245fabce185f67dc9bd68c870e556564))
+
+# [4.10.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.9.1...v4.10.0) (2024-09-29)
+
+
+### Bug Fixes
+
+* component icon is not set ([5ff6ec8](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/5ff6ec815a174de5d3f16d424f1204c60912a8d8))
+
+
+### Features
+
+* add project settings ([1ce4e31](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/1ce4e31a9681bf1a201d2723c8d97e07ecc16592))
+
+## [4.9.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.9.0...v4.9.1) (2024-08-07)
+
+
+### 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)
 
 

Packages/src/Editor/AnimatablePropertyEditor.cs

@@ -76,7 +76,7 @@ namespace Coffee.UIExtensions
             for (var j = 0; j < mats.Count; j++)
             {
                 var mat = mats[j];
-                if (!mat || !mat.shader) continue;
+                if (mat == null || mat.shader == null) continue;
 
                 for (var i = 0; i < ShaderUtil.GetPropertyCount(mat.shader); i++)
                 {

Packages/src/Editor/UIParticleEditor.cs

@@ -2,20 +2,19 @@ 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 Coffee.UIParticleInternal;
 using Object = UnityEngine.Object;
 #endif
-
 #if UNITY_2021_2_OR_NEWER
 using UnityEditor.SceneManagement;
 
@@ -27,8 +26,13 @@ namespace Coffee.UIExtensions
 {
     [CustomEditor(typeof(UIParticle))]
     [CanEditMultipleObjects]
-    internal class UIParticleEditor : Editor
+    internal class UIParticleEditor : GraphicEditor
     {
+        internal class State : ScriptableSingleton<State>
+        {
+            public bool is3DScaleMode;
+        }
+
         //################################
         // Constant or Static Members.
         //################################
@@ -47,7 +51,6 @@ namespace Coffee.UIExtensions
         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 bool s_XYZMode;
 
         private SerializedProperty _maskable;
         private SerializedProperty _scale3D;
@@ -59,8 +62,10 @@ namespace Coffee.UIExtensions
         private SerializedProperty _autoScalingMode;
         private SerializedProperty _useCustomView;
         private SerializedProperty _customViewSize;
+        private SerializedProperty _timeScaleMultiplier;
         private ReorderableList _ro;
         private bool _showMax;
+        private bool _is3DScaleMode;
 
         private static readonly HashSet<Shader> s_Shaders = new HashSet<Shader>();
 #if UNITY_2018 || UNITY_2019
@@ -82,8 +87,10 @@ namespace Coffee.UIExtensions
         /// <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");
@@ -94,6 +101,7 @@ namespace Coffee.UIExtensions
             _autoScalingMode = serializedObject.FindProperty("m_AutoScalingMode");
             _useCustomView = serializedObject.FindProperty("m_UseCustomView");
             _customViewSize = serializedObject.FindProperty("m_CustomViewSize");
+            _timeScaleMultiplier = serializedObject.FindProperty("m_TimeScaleMultiplier");
 
             var sp = serializedObject.FindProperty("m_Particles");
             _ro = new ReorderableList(sp.serializedObject, sp, true, true, true, true)
@@ -102,7 +110,7 @@ namespace Coffee.UIExtensions
                 {
                     var ps = sp.GetArrayElementAtIndex(index).objectReferenceValue as ParticleSystem;
                     var materialCount = 0;
-                    if (ps && ps.TryGetComponent<ParticleSystemRenderer>(out var psr))
+                    if (ps != null && ps.TryGetComponent<ParticleSystemRenderer>(out var psr))
                     {
                         materialCount = psr.sharedMaterials.Length;
                     }
@@ -116,7 +124,7 @@ namespace Coffee.UIExtensions
                     var p = sp.GetArrayElementAtIndex(index);
                     EditorGUI.ObjectField(rect, p, GUIContent.none);
                     var ps = p.objectReferenceValue as ParticleSystem;
-                    if (!ps || !ps.TryGetComponent<ParticleSystemRenderer>(out var psr)) return;
+                    if (ps == null || !ps.TryGetComponent<ParticleSystemRenderer>(out var psr)) return;
 
                     rect.x += 15;
                     rect.width -= 15;
@@ -162,6 +170,19 @@ namespace Coffee.UIExtensions
                     uip.RefreshParticles(uip.particles);
                 }
             }
+
+            // Initialize 3D scale mode.
+            _is3DScaleMode = State.instance.is3DScaleMode;
+            if (!_is3DScaleMode)
+            {
+                var x = _scale3D.FindPropertyRelative("x");
+                var y = _scale3D.FindPropertyRelative("y");
+                var z = _scale3D.FindPropertyRelative("z");
+                _is3DScaleMode = !Mathf.Approximately(x.floatValue, y.floatValue) ||
+                                 !Mathf.Approximately(y.floatValue, z.floatValue) ||
+                                 y.hasMultipleDifferentValues ||
+                                 z.hasMultipleDifferentValues;
+            }
         }
 
         /// <summary>
@@ -170,7 +191,7 @@ namespace Coffee.UIExtensions
         public override void OnInspectorGUI()
         {
             var current = target as UIParticle;
-            if (!current) return;
+            if (current == null) return;
 
             Profiler.BeginSample("(UIP:E) OnInspectorGUI");
             serializedObject.Update();
@@ -180,7 +201,11 @@ namespace Coffee.UIExtensions
 
             // Scale
             EditorGUI.BeginDisabledGroup(!_meshSharing.hasMultipleDifferentValues && _meshSharing.intValue == 4);
-            s_XYZMode = DrawFloatOrVector3Field(_scale3D, s_XYZMode);
+            if (DrawFloatOrVector3Field(_scale3D, _is3DScaleMode) != _is3DScaleMode)
+            {
+                State.instance.is3DScaleMode = _is3DScaleMode = !_is3DScaleMode;
+            }
+
             EditorGUI.EndDisabledGroup();
 
             // AnimatableProperties
@@ -221,6 +246,9 @@ namespace Coffee.UIExtensions
                 _customViewSize.floatValue = Mathf.Max(0.1f, _customViewSize.floatValue);
             }
 
+            // Time Scale Multiplier
+            EditorGUILayout.PropertyField(_timeScaleMultiplier);
+
             // Target ParticleSystems.
             EditorGUI.BeginChangeCheck();
             _ro.DoLayoutList();
@@ -239,7 +267,7 @@ namespace Coffee.UIExtensions
             Profiler.BeginSample("(UIP:E) Non-UI built-in shader is not supported.");
             foreach (var mat in s_TempMaterials)
             {
-                if (!mat || !mat.shader) continue;
+                if (mat == null || mat.shader == null) continue;
                 var shader = mat.shader;
                 if (IsBuiltInObject(shader) && !shader.name.StartsWith("UI/"))
                 {
@@ -258,7 +286,7 @@ namespace Coffee.UIExtensions
             {
                 foreach (var mat in s_TempMaterials)
                 {
-                    if (!mat || !mat.shader) continue;
+                    if (mat == null || mat.shader == null) continue;
                     var shader = mat.shader;
                     if (!s_Shaders.Add(shader)) continue;
 
@@ -436,7 +464,9 @@ namespace Coffee.UIExtensions
         {
             if (!p || (ignoreCurrent && target == p)) return;
 
+            var cr = p.canvasRenderer;
             DestroyImmediate(p);
+            DestroyImmediate(cr);
 
 #if UNITY_2018_3_OR_NEWER
             var stage = PrefabStageUtility.GetCurrentPrefabStage();

Packages/src/Icons.meta

@@ -1,8 +0,0 @@
-fileFormatVersion: 2
-guid: 7a55e246f37df405bac88eac692e3a86
-folderAsset: yes
-DefaultImporter:
-  externalObjects: {}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

Packages/src/README.md

@@ -11,7 +11,7 @@
 [![](https://img.shields.io/github/watchers/mob-sakai/ParticleEffectForUGUI.svg?style=social&label=Watch)](https://github.com/mob-sakai/ParticleEffectForUGUI/subscription)
 [![](https://img.shields.io/twitter/follow/mob_sakai.svg?label=Follow&style=social)](https://twitter.com/intent/follow?screen_name=mob_sakai)
 
-<< [📝 Description](#-description-) | [📌 Key Features](#-key-features) | [🎮 Demo](#-demo) | [⚙ Installation](#-installation) | [🔄 Upgrading to 5.x](#-upgrading-from-3x4x-to-5x) | [🚀 Usage](#-usage) | [🛠 Development Note](#-development-note) | [🤝 Contributing](#-contributing) >>
+<< [📝 Description](#-description-) | [📌 Key Features](#-key-features) | [🎮 Demo](#-demo) | [⚙ Installation](#-installation) | [🚀 Usage](#-usage) | [🛠 Development Note](#-development-note) | [🤝 Contributing](#-contributing) >>
 
 ## 📝 Description <!-- omit in toc -->
 
@@ -27,8 +27,6 @@ You can render, mask, and sort your `ParticleSystems` for UI without the need fo
     - [Install via UPM (with Package Manager UI)](#install-via-upm-with-package-manager-ui)
     - [Install via UPM (Manually)](#install-via-upm-manually)
     - [Install as Embedded Package](#install-as-embedded-package)
-- [🔄 Upgrading from 3.x/4.x to 5.x](#-upgrading-from-3x4x-to-5x)
-  - [Breaking Changes](#breaking-changes)
 - [🚀 Usage](#-usage)
   - [Component: UIParticle](#component-uiparticle)
   - [Basic Usage](#basic-usage)
@@ -36,6 +34,7 @@ You can render, mask, and sort your `ParticleSystems` for UI without the need fo
   - [Usage with `Mask` or `RectMask2D` Component](#usage-with-mask-or-rectmask2d-component)
   - [Usage with Script](#usage-with-script)
   - [Component: UIParticleAttractor](#component-uiparticleattractor)
+  - [Project Settings](#project-settings)
 - [🛠 Development Note](#-development-note)
   - [Compares the Baking mesh approach with the conventional approach](#compares-the-baking-mesh-approach-with-the-conventional-approach)
     - [Performance test results](#performance-test-results)
@@ -145,7 +144,7 @@ _This package requires **Unity 2018.3 or later**._
 
 #### Install as Embedded Package
 
-1. Download a source code zip file from [Releases](https://github.com/mob-sakai/ParticleEffectForUGUI.git/releases) and extract it.
+1. Download a source code zip file from [Releases](https://github.com/mob-sakai/ParticleEffectForUGUI/releases) and extract it.
 2. Place it in your project's `Packages` directory.  
    ![](https://github.com/mob-sakai/mob-sakai/assets/12690315/0b7484b4-5fca-43b0-a9ef-e5dbd99bcdb4)
 - If you want to fix bugs or add features, install it as an embedded package.
@@ -153,24 +152,13 @@ _This package requires **Unity 2018.3 or later**._
 
 <br><br>
 
-## 🔄 Upgrading from 3.x/4.x to 5.x
-
-### Breaking Changes
-
-- The default value of `UIParticle.scale` has been changed from `10` to `1`.
-- `UIParticle` no longer inherits from `MaskableGraphic`.
-- Add project settings for UIParticle
-  - enableLinearToGamma: Enables LinearToGamma during mesh baking
-
-<br><br>
-
 ## 🚀 Usage
 
 ### Component: UIParticle
 
 `UIParticle` controls the ParticleSystems that are attached to its own game objects and child game objects.
 
-![](https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/1cf5753b-33fc-4cef-91c3-413c515a954f)
+![](https://github.com/user-attachments/assets/bc9eb783-afce-4102-ac61-aee9ea8d6f2f)
 
 - **Maskable**: Does this graphic allow maskable.
 - **Scale**: Scale the rendering particles. When the `3D` toggle is enabled, 3D scale (x, y, z) is supported.
@@ -192,6 +180,7 @@ _This package requires **Unity 2018.3 or later**._
   - **UIParticle:** UIParticle.scale will be adjusted.
 - **Use Custom View:** Use this if the particles are not displayed correctly due to min/max particle size.
   - **Custom view size:** Change the bake view size.
+- **Time Scale Multiplier:** Time scale multiplier.
 - **Rendering Order**: The ParticleSystem list to be rendered. You can change the order and the materials.
 
 **NOTE:** Press the `Refresh` button to reconstruct the rendering order based on children ParticleSystem's sorting order
@@ -222,7 +211,7 @@ and z-position.
 If you want to mask particles, set a stencil-supported shader (such as `UI/UIAdditive`) to the material for
 ParticleSystem.
 If you use some custom shaders, see
-the [How to Make a Custom Shader to Support Mask/RectMask2D Component](#how-to-make-a-custom-shader-to-support-maskrectmask2d-component)
+the [How to Make a Custom Shader to Support Mask/RectMask2D Component](#how-to-make-a-custom-shader-to-support-mask-and-rectmask2d-component)
 section.
 
 ![](https://user-images.githubusercontent.com/12690315/95017591-3b512700-0695-11eb-864e-04166ea1809a.png)
@@ -269,6 +258,14 @@ uiParticle.Stop();
 
 <br><br>
 
+### Project Settings
+
+![](https://github.com/user-attachments/assets/befc7f34-fb47-4006-831a-eba79fda11ca)
+
+- Click `Edit > Project Settings` to open the Project Settings window and then select `UI > UI Particle` category.
+
+<br><br>
+
 ## 🛠 Development Note
 
 ### Compares the Baking mesh approach with the conventional approach

Packages/src/Runtime/Coffee.UIParticle.R.dll.meta

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

Packages/src/Runtime/Internal/Extensions/ComponentExtensions.cs

@@ -18,10 +18,10 @@ namespace Coffee.UIParticleInternal
         public static T[] GetComponentsInChildren<T>(this Component self, int depth)
             where T : Component
         {
-            var results = ListPool<T>.Rent();
+            var results = InternalListPool<T>.Rent();
             self.GetComponentsInChildren_Internal(results, depth);
             var array = results.ToArray();
-            ListPool<T>.Return(ref results);
+            InternalListPool<T>.Return(ref results);
             return array;
         }
 
@@ -38,7 +38,7 @@ namespace Coffee.UIParticleInternal
         private static void GetComponentsInChildren_Internal<T>(this Component self, List<T> results, int depth)
             where T : Component
         {
-            if (!self || results == null || depth < 0) return;
+            if (self == null || results == null || depth < 0) return;
 
             var tr = self.transform;
             if (tr.TryGetComponent<T>(out var t))
@@ -59,7 +59,7 @@ namespace Coffee.UIParticleInternal
         /// </summary>
         public static T GetOrAddComponent<T>(this Component self) where T : Component
         {
-            if (!self) return null;
+            if (self == null) return null;
             return self.TryGetComponent<T>(out var component)
                 ? component
                 : self.gameObject.AddComponent<T>();
@@ -134,10 +134,39 @@ namespace Coffee.UIParticleInternal
             Profiler.EndSample();
         }
 
+        /// <summary>
+        /// Add a component of a specific type to the children of a GameObject.
+        /// </summary>
+        public static void AddComponentOnChildren<T>(this Component self, bool includeSelf)
+            where T : Component
+        {
+            if (self == null) return;
+
+            Profiler.BeginSample("(COF)[ComponentExt] AddComponentOnChildren > Self");
+            if (includeSelf && !self.TryGetComponent<T>(out _))
+            {
+                self.gameObject.AddComponent<T>();
+            }
+
+            Profiler.EndSample();
+
+            Profiler.BeginSample("(COF)[ComponentExt] AddComponentOnChildren > Child");
+            var childCount = self.transform.childCount;
+            for (var i = 0; i < childCount; i++)
+            {
+                var child = self.transform.GetChild(i);
+                if (child.TryGetComponent<T>(out _)) continue;
+
+                child.gameObject.AddComponent<T>();
+            }
+
+            Profiler.EndSample();
+        }
+
 #if !UNITY_2021_2_OR_NEWER && !UNITY_2020_3_45 && !UNITY_2020_3_46 && !UNITY_2020_3_47 && !UNITY_2020_3_48
         public static T GetComponentInParent<T>(this Component self, bool includeInactive) where T : Component
         {
-            if (!self) return null;
+            if (self == null) return null;
             if (!includeInactive) return self.GetComponentInParent<T>();
 
             var current = self.transform;
@@ -155,9 +184,9 @@ namespace Coffee.UIParticleInternal
         /// <summary>
         /// Verify whether it can be converted to the specified component.
         /// </summary>
-        internal static bool CanConvertTo<T>(this Object context) where T : MonoBehaviour
+            internal static bool CanConvertTo<T>(this Object context) where T : MonoBehaviour
         {
-            return context && context.GetType() != typeof(T);
+            return context != null && context.GetType() != typeof(T);
         }
 
         /// <summary>
@@ -175,7 +204,7 @@ namespace Coffee.UIParticleInternal
             target.enabled = false;
 
             // Find MonoScript of the specified component.
-            foreach (var script in Resources.FindObjectsOfTypeAll<MonoScript>())
+            foreach (var script in MonoImporter.GetAllRuntimeMonoScripts())
             {
                 if (script.GetClass() != typeof(T))
                 {

Packages/src/Runtime/Internal/Extensions/ListExtensions.cs

@@ -1,19 +0,0 @@
-using System.Collections.Generic;
-
-namespace Coffee.UIParticleInternal
-{
-    /// <summary>
-    /// Extension methods for Component class.
-    /// </summary>
-    internal static class ListExtensions
-    {
-        public static void RemoveAtFast<T>(this List<T> self, int index)
-        {
-            if (self == null) return;
-
-            var lastIndex = self.Count - 1;
-            self[index] = self[lastIndex];
-            self.RemoveAt(lastIndex);
-        }
-    }
-}

Packages/src/Runtime/Internal/Extensions/ListExtensions.cs.meta

@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 833553390099d40c9b212823f0852c46
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

Packages/src/Runtime/Internal/Extensions/Misc.cs

@@ -1,48 +0,0 @@
-using System.Diagnostics;
-using UnityEditor;
-using UnityEngine;
-
-namespace Coffee.UIParticleInternal
-{
-    internal static class Misc
-    {
-        public static void Destroy(Object obj)
-        {
-            if (!obj) return;
-#if UNITY_EDITOR
-            if (!Application.isPlaying)
-            {
-                Object.DestroyImmediate(obj);
-            }
-            else
-#endif
-            {
-                Object.Destroy(obj);
-            }
-        }
-
-        public static void DestroyImmediate(Object obj)
-        {
-            if (!obj) return;
-#if UNITY_EDITOR
-            if (Application.isEditor)
-            {
-                Object.DestroyImmediate(obj);
-            }
-            else
-#endif
-            {
-                Object.Destroy(obj);
-            }
-        }
-
-        [Conditional("UNITY_EDITOR")]
-        public static void SetDirty(Object obj)
-        {
-#if UNITY_EDITOR
-            if (!obj) return;
-            EditorUtility.SetDirty(obj);
-#endif
-        }
-    }
-}

Packages/src/Runtime/Internal/Extensions/SpriteExtensions.cs

@@ -17,23 +17,25 @@ namespace Coffee.UIParticleInternal
             Type.GetType("UnityEditor.Experimental.U2D.SpriteEditorExtension, UnityEditor")
             ?? Type.GetType("UnityEditor.U2D.SpriteEditorExtension, UnityEditor");
 
-        private static readonly MethodInfo s_GetActiveAtlasTextureMethod = s_SpriteEditorExtensionType
+        private static readonly Func<Sprite, Texture2D> s_GetActiveAtlasTextureMethod =
-            .GetMethod("GetActiveAtlasTexture", BindingFlags.Static | BindingFlags.NonPublic);
+            (Func<Sprite, Texture2D>)Delegate.CreateDelegate(typeof(Func<Sprite, Texture2D>),
+                s_SpriteEditorExtensionType
+                    .GetMethod("GetActiveAtlasTexture", BindingFlags.Static | BindingFlags.NonPublic));
 
-        private static readonly MethodInfo s_GetActiveAtlasMethod = s_SpriteEditorExtensionType
+        private static readonly Func<Sprite, SpriteAtlas> s_GetActiveAtlasMethod =
-            .GetMethod("GetActiveAtlas", BindingFlags.Static | BindingFlags.NonPublic);
+            (Func<Sprite, SpriteAtlas>)Delegate.CreateDelegate(typeof(Func<Sprite, SpriteAtlas>),
+                s_SpriteEditorExtensionType
+                    .GetMethod("GetActiveAtlas", BindingFlags.Static | BindingFlags.NonPublic));
 
         /// <summary>
         /// Get the actual texture of a sprite in play mode or edit mode.
         /// </summary>
         public static Texture2D GetActualTexture(this Sprite self)
         {
-            if (!self) return null;
+            if (self == null) return null;
 
-            if (Application.isPlaying) return self.texture;
+            var ret = s_GetActiveAtlasTextureMethod(self);
-
+            return ret != null ? ret : self.texture;
-            var ret = s_GetActiveAtlasTextureMethod.Invoke(null, new object[] { self }) as Texture2D;
-            return ret ? ret : self.texture;
         }
 
         /// <summary>
@@ -41,9 +43,9 @@ namespace Coffee.UIParticleInternal
         /// </summary>
         public static SpriteAtlas GetActiveAtlas(this Sprite self)
         {
-            if (!self) return null;
+            if (self == null) return null;
 
-            return s_GetActiveAtlasMethod.Invoke(null, new object[] { self }) as SpriteAtlas;
+            return s_GetActiveAtlasMethod(self);
         }
 #else
         /// <summary>
@@ -51,7 +53,7 @@ namespace Coffee.UIParticleInternal
         /// </summary>
         internal static Texture2D GetActualTexture(this Sprite self)
         {
-            return self ? self.texture : null;
+            return self != null ? self.texture : null;
         }
 #endif
     }

Packages/src/Runtime/Internal/ProjectSettings/PreloadedProjectSettings.cs

@@ -1,9 +1,9 @@
 using System;
 using System.Linq;
-using System.Reflection;
 using UnityEngine;
 using Object = UnityEngine.Object;
 #if UNITY_EDITOR
+using System.IO;
 using UnityEditor;
 using UnityEditor.Build;
 using UnityEditor.Build.Reporting;
@@ -14,6 +14,14 @@ namespace Coffee.UIParticleInternal
     public abstract class PreloadedProjectSettings : ScriptableObject
 #if UNITY_EDITOR
     {
+        private class Postprocessor : AssetPostprocessor
+        {
+            private static void OnPostprocessAllAssets(string[] _, string[] __, string[] ___, string[] ____)
+            {
+                Initialize();
+            }
+        }
+
         private class PreprocessBuildWithReport : IPreprocessBuildWithReport
         {
             int IOrderedCallback.callbackOrder => 0;
@@ -24,32 +32,32 @@ namespace Coffee.UIParticleInternal
             }
         }
 
-        [InitializeOnLoadMethod]
-        [InitializeOnEnterPlayMode]
         private static void Initialize()
         {
-            const BindingFlags flags = BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy;
             foreach (var t in TypeCache.GetTypesDerivedFrom(typeof(PreloadedProjectSettings<>)))
             {
                 var defaultSettings = GetDefaultSettings(t);
-                if (!defaultSettings)
+                if (defaultSettings == null)
                 {
-                    defaultSettings = t.GetProperty("instance", flags)
+                    // When create a new instance, automatically set it as default settings.
-                        ?.GetValue(null, null) as PreloadedProjectSettings;
+                    defaultSettings = CreateInstance(t) as PreloadedProjectSettings;
                     SetDefaultSettings(defaultSettings);
                 }
                 else if (GetPreloadedSettings(t).Length != 1)
                 {
                     SetDefaultSettings(defaultSettings);
                 }
-            }
 
-            EditorApplication.QueuePlayerLoopUpdate();
+                if (defaultSettings != null)
+                {
+                    defaultSettings.OnInitialize();
+                }
+            }
         }
 
         protected static string GetDefaultName(Type type, bool nicify)
         {
-            var typeName = type.Name.Replace("ProjectSettings", "");
+            var typeName = type.Name;
             return nicify
                 ? ObjectNames.NicifyVariableName(typeName)
                 : typeName;
@@ -58,7 +66,7 @@ namespace Coffee.UIParticleInternal
         private static Object[] GetPreloadedSettings(Type type)
         {
             return PlayerSettings.GetPreloadedAssets()
-                .Where(x => x && x.GetType() == type)
+                .Where(x => x != null && x.GetType() == type)
                 .ToArray();
         }
 
@@ -68,11 +76,13 @@ namespace Coffee.UIParticleInternal
                    ?? AssetDatabase.FindAssets($"t:{nameof(PreloadedProjectSettings)}")
                        .Select(AssetDatabase.GUIDToAssetPath)
                        .Select(AssetDatabase.LoadAssetAtPath<PreloadedProjectSettings>)
-                       .FirstOrDefault(x => x && x.GetType() == type);
+                       .FirstOrDefault(x => x != null && x.GetType() == type);
         }
 
         protected static void SetDefaultSettings(PreloadedProjectSettings asset)
         {
+            if (asset == null) return;
+
             var type = asset.GetType();
             if (string.IsNullOrEmpty(AssetDatabase.GetAssetPath(asset)))
             {
@@ -83,13 +93,17 @@ namespace Coffee.UIParticleInternal
 
                 var assetPath = $"Assets/ProjectSettings/{GetDefaultName(type, false)}.asset";
                 assetPath = AssetDatabase.GenerateUniqueAssetPath(assetPath);
-                AssetDatabase.CreateAsset(asset, assetPath);
+                if (!File.Exists(assetPath))
+                {
+                    AssetDatabase.CreateAsset(asset, assetPath);
+                    asset.OnCreateAsset();
+                }
             }
 
             var preloadedAssets = PlayerSettings.GetPreloadedAssets();
             var projectSettings = GetPreloadedSettings(type);
             PlayerSettings.SetPreloadedAssets(preloadedAssets
-                .Where(x => x)
+                .Where(x => x != null)
                 .Except(projectSettings.Except(new[] { asset }))
                 .Append(asset)
                 .Distinct()
@@ -97,13 +111,20 @@ namespace Coffee.UIParticleInternal
 
             AssetDatabase.Refresh();
         }
+
+        protected virtual void OnCreateAsset()
+        {
+        }
+
+        protected virtual void OnInitialize()
+        {
+        }
     }
 #else
     {
     }
 #endif
 
-
     public abstract class PreloadedProjectSettings<T> : PreloadedProjectSettings
         where T : PreloadedProjectSettings<T>
     {
@@ -112,17 +133,19 @@ namespace Coffee.UIParticleInternal
 #if UNITY_EDITOR
         private string _jsonText;
 
+        public static bool hasInstance => s_Instance != null;
+
         public static T instance
         {
             get
             {
-                if (s_Instance) return s_Instance;
+                if (s_Instance != null) return s_Instance;
 
                 s_Instance = GetDefaultSettings(typeof(T)) as T;
-                if (s_Instance) return s_Instance;
+                if (s_Instance != null) return s_Instance;
 
                 s_Instance = CreateInstance<T>();
-                if (!s_Instance)
+                if (s_Instance == null)
                 {
                     s_Instance = null;
                     return s_Instance;
@@ -151,7 +174,7 @@ namespace Coffee.UIParticleInternal
             }
         }
 #else
-        public static T instance => s_Instance ? s_Instance : s_Instance = CreateInstance<T>();
+    public static T instance => s_Instance != null ? s_Instance : s_Instance = CreateInstance<T>();
 #endif
 
         /// <summary>
@@ -160,7 +183,7 @@ namespace Coffee.UIParticleInternal
         protected virtual void OnEnable()
         {
 #if UNITY_EDITOR
-            var isDefaultSettings = !s_Instance || s_Instance == this || GetDefaultSettings(typeof(T)) == this;
+            var isDefaultSettings = s_Instance == null || s_Instance == this || GetDefaultSettings(typeof(T)) == this;
             if (!isDefaultSettings)
             {
                 DestroyImmediate(this, true);
@@ -170,7 +193,7 @@ namespace Coffee.UIParticleInternal
             EditorApplication.playModeStateChanged += OnPlayModeStateChanged;
 #endif
 
-            if (s_Instance) return;
+            if (s_Instance != null) return;
             s_Instance = this as T;
         }
 
@@ -199,7 +222,7 @@ namespace Coffee.UIParticleInternal
 
             public override void OnGUI(string searchContext)
             {
-                if (!_target)
+                if (_target == null)
                 {
                     if (_editor)
                     {

Packages/src/Runtime/Internal/Utilities/FastAction.cs

@@ -10,8 +10,9 @@ namespace Coffee.UIParticleInternal
     /// </summary>
     internal class FastActionBase<T>
     {
-        private static readonly ObjectPool<LinkedListNode<T>> s_NodePool =
+        private static readonly InternalObjectPool<LinkedListNode<T>> s_NodePool =
-            new ObjectPool<LinkedListNode<T>>(() => new LinkedListNode<T>(default), _ => true, x => x.Value = default);
+            new InternalObjectPool<LinkedListNode<T>>(() => new LinkedListNode<T>(default), _ => true,
+                x => x.Value = default);
 
         private readonly LinkedList<T> _delegates = new LinkedList<T>();
 

Packages/src/Runtime/Internal/Utilities/FrameCache.cs

@@ -46,7 +46,6 @@ namespace Coffee.UIParticleInternal
             GetFrameCache<T>().Set((key1.GetHashCode(), key2.GetHashCode()), result);
         }
 
-
         /// <summary>
         /// Sets a value in the frame cache with a specified key.
         /// </summary>

Packages/src/Runtime/Internal/Utilities/Logging.cs

@@ -5,7 +5,6 @@ using Object = UnityEngine.Object;
 #if ENABLE_COFFEE_LOGGER
 using System.Reflection;
 using System.Collections.Generic;
-
 #else
 using Conditional = System.Diagnostics.ConditionalAttribute;
 #endif
@@ -43,44 +42,40 @@ namespace Coffee.UIParticleInternal
 #endif
         }
 
-
 #if !ENABLE_COFFEE_LOGGER
         [Conditional(k_DisableSymbol)]
 #endif
         public static void LogIf(bool enable, object tag, object message, Object context = null)
         {
             if (!enable) return;
-            Log_Internal(LogType.Log, tag, message, context ? context : tag as Object);
+            Log_Internal(LogType.Log, tag, message, context != null ? context : tag as Object);
         }
 
-
 #if !ENABLE_COFFEE_LOGGER
         [Conditional(k_DisableSymbol)]
 #endif
         public static void Log(object tag, object message, Object context = null)
         {
-            Log_Internal(LogType.Log, tag, message, context ? context : tag as Object);
+            Log_Internal(LogType.Log, tag, message, context != null ? context : tag as Object);
         }
 
-
 #if !ENABLE_COFFEE_LOGGER
         [Conditional(k_DisableSymbol)]
 #endif
         public static void LogWarning(object tag, object message, Object context = null)
         {
-            Log_Internal(LogType.Warning, tag, message, context ? context : tag as Object);
+            Log_Internal(LogType.Warning, tag, message, context != null ? context : tag as Object);
         }
 
         public static void LogError(object tag, object message, Object context = null)
         {
 #if ENABLE_COFFEE_LOGGER
-            Log_Internal(LogType.Error, tag, message, context ? context : tag as Object);
+            Log_Internal(LogType.Error, tag, message, context != null ? context : tag as Object);
 #else
             Debug.LogError($"{tag}: {message}", context);
 #endif
         }
 
-
 #if !ENABLE_COFFEE_LOGGER
         [Conditional(k_DisableSymbol)]
 #endif
@@ -124,7 +119,6 @@ namespace Coffee.UIParticleInternal
 #endif
         }
 
-
 #if !ENABLE_COFFEE_LOGGER
         [Conditional(k_DisableSymbol)]
 #endif
@@ -170,7 +164,6 @@ namespace Coffee.UIParticleInternal
 #endif
         }
 
-
 #if !ENABLE_COFFEE_LOGGER
         [Conditional(k_DisableSymbol)]
 #endif
@@ -209,7 +202,6 @@ namespace Coffee.UIParticleInternal
 #endif
         }
 
-
 #if !ENABLE_COFFEE_LOGGER
         [Conditional(k_DisableSymbol)]
 #endif

Packages/src/Runtime/Internal/Utilities/MaterialRepository.cs

@@ -15,7 +15,7 @@ namespace Coffee.UIParticleInternal
 
 #if UNITY_EDITOR
         [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
-        private static void Clear()
+        public static void Clear()
         {
             s_Repository.Clear();
         }
@@ -55,7 +55,6 @@ namespace Coffee.UIParticleInternal
             Profiler.EndSample();
         }
 
-
         /// <summary>
         /// Adds or retrieves a cached material based on the hash.
         /// </summary>

Packages/src/Runtime/Internal/Utilities/Misc.cs

@@ -0,0 +1,132 @@
+using System;
+using System.Diagnostics;
+using UnityEditor;
+using UnityEngine;
+using Object = UnityEngine.Object;
+#if UNITY_EDITOR
+using System.IO;
+using System.Linq;
+using System.Reflection;
+#if UNITY_2021_2_OR_NEWER
+using UnityEditor.SceneManagement;
+#else
+using UnityEditor.Experimental.SceneManagement;
+#endif
+#endif
+
+namespace Coffee.UIParticleInternal
+{
+    internal static class Misc
+    {
+        public static T[] FindObjectsOfType<T>() where T : Object
+        {
+#if UNITY_2023_1_OR_NEWER
+            return Object.FindObjectsByType<T>(FindObjectsInactive.Include, FindObjectsSortMode.None);
+#else
+            return Object.FindObjectsOfType<T>();
+#endif
+        }
+
+        public static void Destroy(Object obj)
+        {
+            if (obj == null) return;
+#if UNITY_EDITOR
+            if (!Application.isPlaying)
+            {
+                Object.DestroyImmediate(obj);
+            }
+            else
+#endif
+            {
+                Object.Destroy(obj);
+            }
+        }
+
+        public static void DestroyImmediate(Object obj)
+        {
+            if (obj == null) return;
+#if UNITY_EDITOR
+            if (Application.isEditor)
+            {
+                Object.DestroyImmediate(obj);
+            }
+            else
+#endif
+            {
+                Object.Destroy(obj);
+            }
+        }
+
+        [Conditional("UNITY_EDITOR")]
+        public static void SetDirty(Object obj)
+        {
+#if UNITY_EDITOR
+            if (obj == null) return;
+            EditorUtility.SetDirty(obj);
+#endif
+        }
+
+#if UNITY_EDITOR
+        public static T[] GetAllComponentsInPrefabStage<T>() where T : Component
+        {
+            var prefabStage = PrefabStageUtility.GetCurrentPrefabStage();
+            if (prefabStage == null) return Array.Empty<T>();
+
+            return prefabStage.prefabContentsRoot.GetComponentsInChildren<T>(true);
+        }
+
+        public static bool isBatchOrBuilding => Application.isBatchMode || BuildPipeline.isBuildingPlayer;
+#endif
+
+        [Conditional("UNITY_EDITOR")]
+        public static void QueuePlayerLoopUpdate()
+        {
+#if UNITY_EDITOR
+            if (!EditorApplication.isPlaying)
+            {
+                EditorApplication.QueuePlayerLoopUpdate();
+            }
+#endif
+        }
+    }
+
+#if !UNITY_2021_2_OR_NEWER
+    [AttributeUsage(AttributeTargets.Class)]
+    [Conditional("UNITY_EDITOR")]
+    internal class IconAttribute : Attribute
+    {
+        private readonly string _path;
+
+        public IconAttribute(string path)
+        {
+            _path = path;
+        }
+
+#if UNITY_EDITOR
+        private static Action<Object, Texture2D> s_SetIconForObject = typeof(EditorGUIUtility)
+            .GetMethod("SetIconForObject", BindingFlags.Static | BindingFlags.NonPublic)
+            .CreateDelegate(typeof(Action<Object, Texture2D>), null) as Action<Object, Texture2D>;
+
+        [InitializeOnLoadMethod]
+        private static void InitializeOnLoadMethod()
+        {
+            if (Misc.isBatchOrBuilding) return;
+
+            var types = TypeCache.GetTypesWithAttribute<IconAttribute>();
+            var scripts = MonoImporter.GetAllRuntimeMonoScripts();
+            foreach (var type in types)
+            {
+                var script = scripts.FirstOrDefault(x => x.GetClass() == type);
+                if (script == null) continue;
+
+                var path = type.GetCustomAttribute<IconAttribute>()?._path;
+                var icon = AssetDatabase.LoadAssetAtPath<Texture2D>(path);
+                if (icon == null) continue;
+
+                s_SetIconForObject(script, icon);
+            }
+        }
+#endif
+    }
+#endif
+}

Packages/src/Runtime/Internal/Utilities/Misc.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 39ed6a6b0a72e482488bd298b2ae762e
+guid: 182319ecc315e4858b119764af0fbcb0
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Packages/src/Runtime/Internal/Utilities/ObjectPool.cs

@@ -6,15 +6,58 @@ namespace Coffee.UIParticleInternal
     /// <summary>
     /// Object pool.
     /// </summary>
-    internal class ObjectPool<T>
+    internal class InternalObjectPool<T> where T : class
     {
+#if UNITY_2021_1_OR_NEWER
+        private readonly Predicate<T> _onValid; // Delegate for checking if instances are valid
+        private readonly UnityEngine.Pool.ObjectPool<T> _pool;
+
+        public InternalObjectPool(Func<T> onCreate, Predicate<T> onValid, Action<T> onReturn)
+        {
+            _pool = new UnityEngine.Pool.ObjectPool<T>(onCreate, null, onReturn);
+            _onValid = onValid;
+        }
+
+        /// <summary>
+        /// Rent an instance from the pool.
+        /// When you no longer need it, return it with <see cref="Return" />.
+        /// </summary>
+        public T Rent()
+        {
+            while (0 < _pool.CountInactive)
+            {
+                var instance = _pool.Get();
+                if (_onValid(instance))
+                {
+                    return instance;
+                }
+            }
+
+            // If there are no instances in the pool, create a new one.
+            Logging.Log(this, $"A new instance is created (pooled: {_pool.CountInactive}, created: {_pool.CountAll}).");
+            return _pool.Get();
+        }
+
+        /// <summary>
+        /// Return an instance to the pool and assign null.
+        /// Be sure to return the instance obtained with <see cref="Rent" /> with this method.
+        /// </summary>
+        public void Return(ref T instance)
+        {
+            if (instance == null) return; // Ignore if already pooled or null.
+
+            _pool.Release(instance);
+            Logging.Log(this, $"An instance is released (pooled: {_pool.CountInactive}, created: {_pool.CountAll}).");
+            instance = default; // Set the reference to null.
+        }
+#else
         private readonly Func<T> _onCreate; // Delegate for creating instances
         private readonly Action<T> _onReturn; // Delegate for returning instances to the pool
         private readonly Predicate<T> _onValid; // Delegate for checking if instances are valid
         private readonly Stack<T> _pool = new Stack<T>(32); // Object pool
         private int _count; // Total count of created instances
 
-        public ObjectPool(Func<T> onCreate, Predicate<T> onValid, Action<T> onReturn)
+        public InternalObjectPool(Func<T> onCreate, Predicate<T> onValid, Action<T> onReturn)
         {
             _onCreate = onCreate;
             _onValid = onValid;
@@ -54,15 +97,40 @@ namespace Coffee.UIParticleInternal
             Logging.Log(this, $"An instance is released (pooled: {_pool.Count}, created: {_count}).");
             instance = default; // Set the reference to null.
         }
+#endif
     }
 
     /// <summary>
     /// Object pool for <see cref="List{T}" />.
     /// </summary>
-    internal static class ListPool<T>
+    internal static class InternalListPool<T>
     {
-        private static readonly ObjectPool<List<T>> s_ListPool =
+#if UNITY_2021_1_OR_NEWER
-            new ObjectPool<List<T>>(() => new List<T>(), _ => true, x => x.Clear());
+        /// <summary>
+        /// Rent an instance from the pool.
+        /// When you no longer need it, return it with <see cref="Return" />.
+        /// </summary>
+        public static List<T> Rent()
+        {
+            return UnityEngine.Pool.ListPool<T>.Get();
+        }
+
+        /// <summary>
+        /// Return an instance to the pool and assign null.
+        /// Be sure to return the instance obtained with <see cref="Rent" /> with this method.
+        /// </summary>
+        public static void Return(ref List<T> toRelease)
+        {
+            if (toRelease != null)
+            {
+                UnityEngine.Pool.ListPool<T>.Release(toRelease);
+            }
+
+            toRelease = null;
+        }
+#else
+        private static readonly InternalObjectPool<List<T>> s_ListPool =
+            new InternalObjectPool<List<T>>(() => new List<T>(), _ => true, x => x.Clear());
 
         /// <summary>
         /// Rent an instance from the pool.
@@ -81,5 +149,6 @@ namespace Coffee.UIParticleInternal
         {
             s_ListPool.Return(ref toRelease);
         }
+#endif
     }
 }

Packages/src/Runtime/Internal/Utilities/ObjectRepository.cs

@@ -90,7 +90,7 @@ namespace Coffee.UIParticleInternal
             Profiler.BeginSample("(COF)[ObjectRepository] GetFromCache");
             if (_cache.TryGetValue(hash, out var entry))
             {
-                if (!entry.storedObject)
+                if (entry.storedObject == null)
                 {
                     Release(ref entry.storedObject);
                     Profiler.EndSample();
@@ -116,7 +116,7 @@ namespace Coffee.UIParticleInternal
 
         private void Add(Hash128 hash, ref T obj, T newObject)
         {
-            if (!newObject)
+            if (newObject == null)
             {
                 Release(ref obj);
                 obj = newObject;
@@ -151,7 +151,7 @@ namespace Coffee.UIParticleInternal
                 && _cache.TryGetValue(hash, out var entry))
             {
                 entry.reference--;
-                if (entry.reference <= 0 || !entry.storedObject)
+                if (entry.reference <= 0 || entry.storedObject == null)
                 {
                     Remove(entry);
                 }
@@ -192,7 +192,7 @@ namespace Coffee.UIParticleInternal
             public void Release(Action<T> onRelease)
             {
                 reference = 0;
-                if (storedObject)
+                if (storedObject != null)
                 {
                     onRelease?.Invoke(storedObject);
                 }

Packages/src/Runtime/Internal/Utilities/UIExtraCallbacks.cs

@@ -14,6 +14,8 @@ namespace Coffee.UIParticleInternal
         private static readonly FastAction s_AfterCanvasRebuildAction = new FastAction();
         private static readonly FastAction s_LateAfterCanvasRebuildAction = new FastAction();
         private static readonly FastAction s_BeforeCanvasRebuildAction = new FastAction();
+        private static readonly FastAction s_OnScreenSizeChangedAction = new FastAction();
+        private static Vector2Int s_LastScreenSize;
 
         static UIExtraCallbacks()
         {
@@ -48,6 +50,15 @@ namespace Coffee.UIParticleInternal
             remove => s_AfterCanvasRebuildAction.Remove(value);
         }
 
+        /// <summary>
+        /// Event that occurs when the screen size changes.
+        /// </summary>
+        public static event Action onScreenSizeChanged
+        {
+            add => s_OnScreenSizeChangedAction.Add(value);
+            remove => s_OnScreenSizeChangedAction.Remove(value);
+        }
+
         /// <summary>
         /// Initializes the UIExtraCallbacks to ensure proper event handling.
         /// </summary>
@@ -77,6 +88,17 @@ namespace Coffee.UIParticleInternal
         /// </summary>
         private static void OnBeforeCanvasRebuild()
         {
+            var screenSize = new Vector2Int(Screen.width, Screen.height);
+            if (s_LastScreenSize != screenSize)
+            {
+                if (s_LastScreenSize != default)
+                {
+                    s_OnScreenSizeChangedAction.Invoke();
+                }
+
+                s_LastScreenSize = screenSize;
+            }
+
             s_BeforeCanvasRebuildAction.Invoke();
             InitializeAfterCanvasRebuild();
         }

Packages/src/Runtime/UIParticle.cs

@@ -3,22 +3,26 @@ using System.Collections.Generic;
 using System.Runtime.CompilerServices;
 using Coffee.UIParticleInternal;
 using UnityEngine;
-using UnityEngine.EventSystems;
 using UnityEngine.Rendering;
 using UnityEngine.Serialization;
+using UnityEngine.UI;
 using Random = UnityEngine.Random;
 
 [assembly: InternalsVisibleTo("Coffee.UIParticle.Editor")]
+[assembly: InternalsVisibleTo("Coffee.UIParticle.Editor.Tests")]
+[assembly: InternalsVisibleTo("Coffee.UIParticle.PerformanceDemo")]
+[assembly: InternalsVisibleTo("Coffee.UIParticle.Demo")]
 
 namespace Coffee.UIExtensions
 {
     /// <summary>
     /// Render maskable and sortable particle effect ,without Camera, RenderTexture or Canvas.
     /// </summary>
+    [Icon("Packages/com.coffee.ui-particle/Editor/UIParticleIcon.png")]
     [ExecuteAlways]
     [RequireComponent(typeof(RectTransform))]
     [RequireComponent(typeof(CanvasRenderer))]
-    public class UIParticle : UIBehaviour, ISerializationCallbackReceiver
+    public class UIParticle : MaskableGraphic, ISerializationCallbackReceiver
     {
         public enum AutoScalingMode
         {
@@ -60,7 +64,7 @@ namespace Coffee.UIExtensions
 
         [Tooltip("Scale the rendering particles. When the `3D` toggle is enabled, 3D scale (x, y, z) is supported.")]
         [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.")]
@@ -118,47 +122,23 @@ namespace Coffee.UIExtensions
         private float m_CustomViewSize = 10;
 
         [SerializeField]
-        private bool m_Maskable = true;
+        [Tooltip("Time scale multiplier.")]
+        private float m_TimeScaleMultiplier = 1;
 
         private readonly List<UIParticleRenderer> _renderers = new List<UIParticleRenderer>();
         private Camera _bakeCamera;
-        private Canvas _canvas;
         private int _groupId;
         private bool _isScaleStored;
         private Vector3 _storedScale;
         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;
+            get => false;
-            set
+            set { }
-            {
-                if (value == m_Maskable) return;
-                m_Maskable = value;
-                UpdateRendererMaterial();
-            }
         }
 
         /// <summary>
@@ -283,6 +263,15 @@ namespace Coffee.UIExtensions
             set => m_CustomViewSize = Mathf.Max(0.1f, value);
         }
 
+        /// <summary>
+        /// Time scale multiplier.
+        /// </summary>
+        public float timeScaleMultiplier
+        {
+            get => m_TimeScaleMultiplier;
+            set => m_TimeScaleMultiplier = value;
+        }
+
         internal bool useMeshSharing => m_MeshSharing != MeshSharing.None;
 
         internal bool isPrimary =>
@@ -335,15 +324,15 @@ 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();
             UIParticleUpdater.Register(this);
+            RegisterDirtyMaterialCallback(UpdateRendererMaterial);
 
-            //
             if (0 < particles.Count)
             {
                 RefreshParticles(particles);
@@ -353,7 +342,7 @@ namespace Coffee.UIExtensions
                 RefreshParticles();
             }
 
-            UpdateRendererMaterial();
+            base.OnEnable();
         }
 
         /// <summary>
@@ -370,15 +359,9 @@ namespace Coffee.UIExtensions
             _isScaleStored = false;
             UIParticleUpdater.Unregister(this);
             _renderers.ForEach(r => r.Reset());
-            _canvas = null;
+            UnregisterDirtyMaterialCallback(UpdateRendererMaterial);
-        }
 
-        /// <summary>
+            base.OnDisable();
-        /// Called when the state of the parent Canvas is changed.
-        /// </summary>
-        protected override void OnCanvasHierarchyChanged()
-        {
-            _canvas = null;
         }
 
         /// <summary>
@@ -388,14 +371,6 @@ 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()
-        {
-            _canvas = null;
-        }
-
         void ISerializationCallbackReceiver.OnBeforeSerialize()
         {
         }
@@ -496,7 +471,7 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < _renderers.Count; i++)
             {
                 var r = _renderers[i];
-                if (!r || !r.material) continue;
+                if (r == null || r.material == null) continue;
                 result.Add(r.material);
             }
         }
@@ -514,7 +489,7 @@ namespace Coffee.UIExtensions
         /// </summary>
         public void SetParticleSystemInstance(GameObject instance, bool destroyOldParticles)
         {
-            if (!instance) return;
+            if (instance == null) return;
 
             var childCount = transform.childCount;
             for (var i = 0; i < childCount; i++)
@@ -543,7 +518,7 @@ namespace Coffee.UIExtensions
         /// </summary>
         public void SetParticleSystemPrefab(GameObject prefab)
         {
-            if (!prefab) return;
+            if (prefab == null) return;
 
             SetParticleSystemInstance(Instantiate(prefab.gameObject), true);
         }
@@ -563,7 +538,7 @@ namespace Coffee.UIExtensions
         /// </summary>
         private void RefreshParticles(GameObject root)
         {
-            if (!root) return;
+            if (root == null) return;
             root.GetComponentsInChildren(true, particles);
             for (var i = particles.Count - 1; 0 <= i; i--)
             {
@@ -616,13 +591,15 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < particleSystems.Count; i++)
             {
                 var ps = particleSystems[i];
-                if (!ps) continue;
+                if (ps == null) continue;
-                GetRenderer(j++).Set(this, ps, false);
+
+                var mainEmitter = ps.GetMainEmitter(particleSystems);
+                GetRenderer(j++).Set(this, ps, false, mainEmitter);
 
                 // If the trail is enabled, set it additionally.
                 if (ps.trails.enabled)
                 {
-                    GetRenderer(j++).Set(this, ps, true);
+                    GetRenderer(j++).Set(this, ps, true, mainEmitter);
                 }
             }
         }
@@ -665,7 +642,7 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < _renderers.Count; i++)
             {
                 var r = _renderers[i];
-                if (r) continue;
+                if (r != null) continue;
 
                 RefreshParticles(particles);
                 break;
@@ -675,7 +652,7 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < _renderers.Count; i++)
             {
                 var r = _renderers[i];
-                if (!r) continue;
+                if (r == null) continue;
 
                 r.UpdateMesh(bakeCamera);
             }
@@ -688,12 +665,23 @@ 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++)
             {
                 var r = _renderers[i];
-                if (!r) continue;
+                if (r == null) continue;
                 r.maskable = maskable;
                 r.SetMaterialDirty();
             }
@@ -706,7 +694,7 @@ namespace Coffee.UIExtensions
                 _renderers.Add(UIParticleRenderer.AddRenderer(this, index));
             }
 
-            if (!_renderers[index])
+            if (_renderers[index] == null)
             {
                 _renderers[index] = UIParticleRenderer.AddRenderer(this, index);
             }
@@ -716,13 +704,13 @@ namespace Coffee.UIExtensions
 
         private Camera GetBakeCamera()
         {
-            if (!canvas) return Camera.main;
+            if (canvas == null) return Camera.main;
             if (!useCustomView && canvas.renderMode != RenderMode.ScreenSpaceOverlay && canvas.rootCanvas.worldCamera)
             {
                 return canvas.rootCanvas.worldCamera;
             }
 
-            if (_bakeCamera)
+            if (_bakeCamera != null)
             {
                 _bakeCamera.orthographicSize = useCustomView ? customViewSize : 10;
                 return _bakeCamera;
@@ -741,7 +729,7 @@ namespace Coffee.UIExtensions
             }
 
             // Create baking camera.
-            if (!_bakeCamera)
+            if (_bakeCamera == null)
             {
                 var go = new GameObject("[generated] UIParticle BakingCamera");
                 go.SetActive(false);
@@ -763,7 +751,7 @@ namespace Coffee.UIExtensions
             _bakeCamera.useOcclusionCulling = false;
 
             _bakeCamera.gameObject.SetActive(false);
-            _bakeCamera.gameObject.hideFlags = HideFlags.HideAndDontSave;
+            _bakeCamera.gameObject.hideFlags = UIParticleProjectSettings.globalHideFlags;
 
             return _bakeCamera;
         }

Packages/src/Runtime/UIParticle.cs.meta

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

Packages/src/Runtime/UIParticleAttractor.cs

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

Packages/src/Runtime/UIParticleAttractor.cs.meta

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

Packages/src/Runtime/UIParticleProjectSettings.cs

@@ -17,6 +17,18 @@ namespace Coffee.UIExtensions
             set => instance.m_EnableLinearToGamma = value;
         }
 
+
+        [Header("Editor")]
+        [Tooltip("Hide the automatically generated objects.\n" +
+                 "  - UIParticleRenderer\n" +
+                 "  - UIParticle BakingCamera")]
+        [SerializeField]
+        private bool m_HideGeneratedObjects = true;
+
+        public static HideFlags globalHideFlags => instance.m_HideGeneratedObjects
+            ? HideFlags.DontSave | HideFlags.NotEditable | HideFlags.HideInHierarchy | HideFlags.HideInInspector
+            : HideFlags.DontSave | HideFlags.NotEditable;
+
 #if UNITY_EDITOR
         [SettingsProvider]
         private static SettingsProvider CreateSettingsProvider()

Packages/src/Runtime/UIParticleProjectSettings.cs.meta

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

Packages/src/Runtime/UIParticleRenderer.cs

@@ -4,7 +4,6 @@
 #elif UNITY_2022_3_OR_NEWER
 #define PS_BAKE_API_V2
 #endif
-
 using System;
 using System.Collections.Generic;
 using Coffee.UIParticleInternal;
@@ -16,6 +15,7 @@ using UnityEngine.UI;
 
 namespace Coffee.UIExtensions
 {
+    [Icon("Packages/com.coffee.ui-particle/Editor/UIParticleIcon.png")]
     [ExecuteAlways]
     [RequireComponent(typeof(RectTransform))]
     [RequireComponent(typeof(CanvasRenderer))]
@@ -41,6 +41,7 @@ namespace Coffee.UIExtensions
         private Vector2Int _prevScreenSize;
         private bool _preWarm;
         private ParticleSystemRenderer _renderer;
+        private ParticleSystem _mainEmitter;
 
         public override Texture mainTexture => _isTrail ? null : _particleSystem.GetTextureForSprite();
 
@@ -54,7 +55,7 @@ namespace Coffee.UIExtensions
                 s_Corners[1] = transform.TransformPoint(_lastBounds.min.x, _lastBounds.max.y, 0);
                 s_Corners[2] = transform.TransformPoint(_lastBounds.max.x, _lastBounds.max.y, 0);
                 s_Corners[3] = transform.TransformPoint(_lastBounds.max.x, _lastBounds.min.y, 0);
-                if (canvas)
+                if (canvas != null)
                 {
                     var worldToLocalMatrix = canvas.rootCanvas.transform.worldToLocalMatrix;
                     for (var i = 0; i < 4; ++i)
@@ -94,7 +95,7 @@ namespace Coffee.UIExtensions
         {
             get
             {
-                if (!_materialForRendering)
+                if (_materialForRendering == null)
                 {
                     _materialForRendering = base.materialForRendering;
                 }
@@ -105,7 +106,7 @@ namespace Coffee.UIExtensions
 
         public void Reset(int index = -1)
         {
-            if (_renderer)
+            if (_renderer != null)
             {
                 _renderer.enabled = true;
             }
@@ -113,13 +114,14 @@ namespace Coffee.UIExtensions
             _parent = null;
             _particleSystem = null;
             _renderer = null;
+            _mainEmitter = null;
             if (0 <= index)
             {
                 _index = index;
             }
 
             //_emitter = null;
-            if (this && isActiveAndEnabled)
+            if (isActiveAndEnabled)
             {
                 material = null;
                 canvasRenderer.Clear();
@@ -137,7 +139,8 @@ namespace Coffee.UIExtensions
         {
             base.OnEnable();
 
-            if (!s_CombineInstances[0].mesh)
+            hideFlags = UIParticleProjectSettings.globalHideFlags;
+            if (s_CombineInstances[0].mesh == null)
             {
                 s_CombineInstances[0].mesh = new Mesh
                 {
@@ -161,7 +164,7 @@ namespace Coffee.UIExtensions
             // Create renderer object.
             var go = new GameObject("[generated] UIParticleRenderer", typeof(UIParticleRenderer))
             {
-                hideFlags = HideFlags.HideAndDontSave,
+                hideFlags = UIParticleProjectSettings.globalHideFlags,
                 layer = parent.gameObject.layer
             };
 
@@ -201,7 +204,6 @@ namespace Coffee.UIExtensions
                 return modifiedMaterial;
             }
 
-            //
             var hash = new Hash128(
                 modifiedMaterial ? (uint)modifiedMaterial.GetInstanceID() : 0,
                 texture ? (uint)texture.GetInstanceID() : 0,
@@ -224,7 +226,7 @@ namespace Coffee.UIExtensions
             return _modifiedMaterial;
         }
 
-        public void Set(UIParticle parent, ParticleSystem ps, bool isTrail)
+        public void Set(UIParticle parent, ParticleSystem ps, bool isTrail, ParticleSystem mainEmitter)
         {
             _parent = parent;
             maskable = parent.maskable;
@@ -247,10 +249,7 @@ namespace Coffee.UIExtensions
 
             ps.TryGetComponent(out _renderer);
             _renderer.enabled = false;
-
-            //_emitter = emitter;
             _isTrail = isTrail;
-
             _renderer.GetSharedMaterials(s_Materials);
             material = s_Materials[isTrail ? 1 : 0];
             s_Materials.Clear();
@@ -267,6 +266,7 @@ namespace Coffee.UIExtensions
             _prevScreenSize = new Vector2Int(Screen.width, Screen.height);
             _prevCanvasScale = canvas ? canvas.scaleFactor : 1f;
             _delay = true;
+            _mainEmitter = mainEmitter;
 
             canvasRenderer.SetTexture(null);
 
@@ -283,10 +283,6 @@ namespace Coffee.UIExtensions
                 || !transform.lossyScale.GetScaled(_parent.scale3DForCalc).IsVisible() // Scale is not visible.
                 || (!_particleSystem.IsAlive() && !_particleSystem.isPlaying) // No particle.
                 || (_isTrail && !_particleSystem.trails.enabled) // Trail, but it is not enabled.
-#if UNITY_2018_3_OR_NEWER
-                || canvasRenderer.GetInheritedAlpha() <
-                0.01f // #102: Do not bake particle system to mesh when the alpha is zero.
-#endif
             )
             {
                 Profiler.BeginSample("[UIParticleRenderer] Clear Mesh");
@@ -298,13 +294,31 @@ namespace Coffee.UIExtensions
                 return;
             }
 
+            // Reset custom data.
+            // var customData = _particleSystem.customData;
+            // if (!customData.enabled || customData.GetMode(ParticleSystemCustomData.Custom1) == ParticleSystemCustomDataMode.Disabled)
+            // {
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 0, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 1, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 2, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 3, 0);
+            // }
+            //
+            // if (!customData.enabled || customData.GetMode(ParticleSystemCustomData.Custom2) == ParticleSystemCustomDataMode.Disabled)
+            // {
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 0, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 1, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 2, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 3, 0);
+            // }
+
             var main = _particleSystem.main;
             var scale = GetWorldScale();
             var psPos = _particleSystem.transform.position;
 
             // Simulate particles.
             Profiler.BeginSample("[UIParticle] Bake Mesh > Simulate Particles");
-            if (!_isTrail && _parent.canSimulate)
+            if (!_isTrail && _parent.canSimulate && !_mainEmitter)
             {
 #if UNITY_EDITOR
                 if (!Application.isPlaying)
@@ -315,6 +329,13 @@ namespace Coffee.UIExtensions
 #endif
                 {
                     ResolveResolutionChange(psPos, scale);
+
+                    // fix: second and subsequent bursts not displayed when world simulation and non-looping. (#326)
+                    if (!_particleSystem.IsLocalSpace() && !main.loop && _particleSystem.time == 0)
+                    {
+                        _delay = true;
+                    }
+
                     Simulate(scale, _parent.isPaused || _delay);
 
                     if (_delay && !_parent.isPaused)
@@ -422,17 +443,16 @@ namespace Coffee.UIExtensions
                     workerMesh.LinearToGamma();
                 }
 
-                var components = ListPool<Component>.Rent();
+                var components = InternalListPool<Component>.Rent();
                 GetComponents(typeof(IMeshModifier), components);
-
-#pragma warning disable CS0618 // Type or member is obsolete
                 for (var i = 0; i < components.Count; i++)
                 {
+#pragma warning disable CS0618 // Type or member is obsolete
                     ((IMeshModifier)components[i]).ModifyMesh(workerMesh);
-                }
 #pragma warning restore CS0618 // Type or member is obsolete
+                }
 
-                ListPool<Component>.Return(ref components);
+                InternalListPool<Component>.Return(ref components);
             }
 
             Profiler.EndSample();
@@ -444,7 +464,7 @@ namespace Coffee.UIExtensions
 
             // Get grouped renderers.
             Profiler.BeginSample("[UIParticleRenderer] Set Mesh");
-            var renderers = ListPool<UIParticleRenderer>.Rent();
+            var renderers = InternalListPool<UIParticleRenderer>.Rent();
             if (_parent.useMeshSharing)
             {
                 UIParticleUpdater.GetGroupedRenderers(_parent.groupId, _index, renderers);
@@ -461,7 +481,7 @@ namespace Coffee.UIExtensions
                 r.canvasRenderer.SetMaterial(materialForRendering, 0);
             }
 
-            ListPool<UIParticleRenderer>.Return(ref renderers);
+            InternalListPool<UIParticleRenderer>.Return(ref renderers);
 
             if (_parent.canRender)
             {
@@ -544,6 +564,30 @@ namespace Coffee.UIExtensions
                     return Matrix4x4.Translate(psPos)
                            * Matrix4x4.Scale(scale);
                 case ParticleSystemSimulationSpace.World:
+                    if (_isTrail)
+                    {
+                        return Matrix4x4.Translate(psPos)
+                               * Matrix4x4.Scale(scale)
+                               * Matrix4x4.Translate(-psPos);
+                    }
+
+                    if (_mainEmitter)
+                    {
+                        if (_mainEmitter.IsLocalSpace())
+                        {
+                            return Matrix4x4.Translate(psPos)
+                                   * Matrix4x4.Scale(scale)
+                                   * Matrix4x4.Translate(-psPos);
+                        }
+                        else
+                        {
+                            psPos = _particleSystem.transform.position - _mainEmitter.transform.position;
+                            return Matrix4x4.Translate(psPos)
+                                   * Matrix4x4.Scale(scale)
+                                   * Matrix4x4.Translate(-psPos);
+                        }
+                    }
+
                     return Matrix4x4.Scale(scale);
                 case ParticleSystemSimulationSpace.Custom:
                     return Matrix4x4.Translate(_particleSystem.main.customSimulationSpace.position.GetScaled(scale))
@@ -606,6 +650,7 @@ namespace Coffee.UIExtensions
                 : main.useUnscaledTime
                     ? Time.unscaledDeltaTime
                     : Time.deltaTime;
+            deltaTime *= _parent.timeScaleMultiplier;
 
             // Pre-warm:
             if (0 < deltaTime && _preWarm)
@@ -686,7 +731,7 @@ namespace Coffee.UIExtensions
             if (s_Mpb.isEmpty) return;
 
             // #41: Copy the value from MaterialPropertyBlock to CanvasRenderer
-            if (!materialForRendering) return;
+            if (materialForRendering == null) return;
 
             for (var i = 0; i < _parent.m_AnimatableProperties.Length; i++)
             {

Packages/src/Runtime/UIParticleUpdater.cs

@@ -16,37 +16,50 @@ namespace Coffee.UIExtensions
 
         public static void Register(UIParticle particle)
         {
-            if (!particle) return;
+            if (particle == null) return;
             s_ActiveParticles.Add(particle);
         }
 
         public static void Unregister(UIParticle particle)
         {
-            if (!particle) return;
+            if (particle == null) return;
             s_ActiveParticles.Remove(particle);
         }
 
         public static void Register(UIParticleAttractor attractor)
         {
-            if (!attractor) return;
+            if (attractor == null) return;
             s_ActiveAttractors.Add(attractor);
         }
 
         public static void Unregister(UIParticleAttractor attractor)
         {
-            if (!attractor) return;
+            if (attractor == null) return;
             s_ActiveAttractors.Remove(attractor);
         }
 
 #if UNITY_EDITOR
         [InitializeOnLoadMethod]
+        private static void InitializeOnLoad()
+        {
+            UIExtraCallbacks.onAfterCanvasRebuild += Refresh;
+
+            EditorApplication.playModeStateChanged += state =>
+            {
+                UIExtraCallbacks.onAfterCanvasRebuild -= Refresh;
+                if (state == PlayModeStateChange.EnteredEditMode || state == PlayModeStateChange.EnteredPlayMode)
+                {
+                    UIExtraCallbacks.onAfterCanvasRebuild += Refresh;
+                }
+            };
+        }
 #else
         [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
-#endif
         private static void InitializeOnLoad()
         {
             UIExtraCallbacks.onAfterCanvasRebuild += Refresh;
         }
+#endif
 
         private static void Refresh()
         {
@@ -58,7 +71,7 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < s_ActiveParticles.Count; i++)
             {
                 var uip = s_ActiveParticles[i];
-                if (!uip || !uip.canvas || !uip.isPrimary || !s_UpdatedGroupIds.Add(uip.groupId)) continue;
+                if (uip == null || uip.canvas == null || !uip.isPrimary || !s_UpdatedGroupIds.Add(uip.groupId)) continue;
 
                 uip.UpdateTransformScale();
                 uip.UpdateRenderers();
@@ -68,7 +81,7 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < s_ActiveParticles.Count; i++)
             {
                 var uip = s_ActiveParticles[i];
-                if (!uip || !uip.canvas) continue;
+                if (uip == null || uip.canvas == null) continue;
 
                 uip.UpdateTransformScale();
 
@@ -112,7 +125,7 @@ namespace Coffee.UIExtensions
                 var uip = s_ActiveParticles[i];
                 if (!uip.useMeshSharing || uip.groupId != groupId) continue;
                 if (uip.isPrimary) return uip;
-                if (!primary && uip.canSimulate) primary = uip;
+                if (primary == null && uip.canSimulate) primary = uip;
             }
 
             return primary;

Packages/src/Runtime/Utilities/ParticleSystemExtensions.cs

@@ -13,11 +13,7 @@ namespace Coffee.UIParticleInternal
         {
             if (s_TmpParticles.Length < size)
             {
-                while (s_TmpParticles.Length < size)
+                size = Mathf.NextPowerOfTwo(size);
-                {
-                    size = Mathf.NextPowerOfTwo(size);
-                }
-
                 s_TmpParticles = new ParticleSystem.Particle[size];
             }
 
@@ -88,11 +84,11 @@ namespace Coffee.UIParticleInternal
                 var bRenderer = b.GetComponent<ParticleSystemRenderer>();
 
                 // Render queue: ascending
-                var aMat = aRenderer.sharedMaterial ? aRenderer.sharedMaterial : aRenderer.trailMaterial;
+                var aMat = aRenderer.sharedMaterial != null ? aRenderer.sharedMaterial : aRenderer.trailMaterial;
-                var bMat = bRenderer.sharedMaterial ? bRenderer.sharedMaterial : bRenderer.trailMaterial;
+                var bMat = bRenderer.sharedMaterial != null ? bRenderer.sharedMaterial : bRenderer.trailMaterial;
-                if (!aMat && !bMat) return 0;
+                if (aMat == null && bMat == null) return 0;
-                if (!aMat) return -1;
+                if (aMat == null) return -1;
-                if (!bMat) return 1;
+                if (bMat == null) return 1;
 
                 if (sortByMaterial)
                 {
@@ -146,7 +142,7 @@ namespace Coffee.UIParticleInternal
 
         public static Texture2D GetTextureForSprite(this ParticleSystem self)
         {
-            if (!self) return null;
+            if (self == null) return null;
 
             // Get sprite's texture.
             var tsaModule = self.textureSheetAnimation;
@@ -155,7 +151,7 @@ namespace Coffee.UIParticleInternal
             for (var i = 0; i < tsaModule.spriteCount; i++)
             {
                 var sprite = tsaModule.GetSprite(i);
-                if (!sprite) continue;
+                if (sprite == null) continue;
 
                 return sprite.GetActualTexture();
             }
@@ -167,9 +163,38 @@ namespace Coffee.UIParticleInternal
         {
             foreach (var p in self)
             {
-                if (!p) continue;
+                if (p == null) continue;
                 action.Invoke(p);
             }
         }
+
+        public static ParticleSystem GetMainEmitter(this ParticleSystem self, List<ParticleSystem> list)
+        {
+            if (self == null || list == null || list.Count == 0) return null;
+
+            for (var i = 0; i < list.Count; i++)
+            {
+                var parent = list[i];
+                if (parent != self && IsSubEmitterOf(self, parent)) return parent;
+            }
+
+            return null;
+        }
+
+        public static bool IsSubEmitterOf(this ParticleSystem self, ParticleSystem parent)
+        {
+            if (self == null || parent == null) return false;
+
+            var subEmitters = parent.subEmitters;
+            if (!subEmitters.enabled) return false; // No sub emitters.
+
+            var count = subEmitters.subEmittersCount;
+            for (var i = 0; i < count; i++)
+            {
+                if (subEmitters.GetSubEmitterSystem(i) == self) return true;
+            }
+
+            return false;
+        }
     }
 }

Packages/src/Samples~/Demo/Scripts/CopyItemOnStart.cs

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

Packages/src/Samples~/Demo/Scripts/UIElementDragger.cs

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

Packages/src/Samples~/Demo/Scripts/UIParticle_Demo.cs

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

Packages/src/Shaders/UIAdditive.shader

@@ -40,7 +40,10 @@
         Lighting Off
         ZWrite Off
         ZTest [unity_GUIZTestMode]
-        Fog { Mode Off }
+        Fog
+        {
+            Mode Off
+        }
         Blend One One
 
         ColorMask [_ColorMask]
@@ -61,21 +64,21 @@
 
             struct appdata_t
             {
-                float4 vertex   : POSITION;
+                float4 vertex : POSITION;
-                float4 color    : COLOR;
+                float4 color : COLOR;
                 float2 texcoord : TEXCOORD0;
                 UNITY_VERTEX_INPUT_INSTANCE_ID
             };
 
             struct v2f
             {
-                float4 vertex           : SV_POSITION;
+                float4 vertex : SV_POSITION;
-                fixed4 color            : COLOR;
+                fixed4 color : COLOR;
-                float2 texcoord         : TEXCOORD0;
+                float2 texcoord : TEXCOORD0;
-                float4 worldPosition    : TEXCOORD1;
+                float4 worldPosition : TEXCOORD1;
                 UNITY_VERTEX_OUTPUT_STEREO
             };
-            
+
             fixed4 _Color;
             sampler2D _MainTex;
             float4 _MainTex_ST;
@@ -114,4 +117,4 @@
             ENDCG
         }
     }
-}
+}

Packages/src/package.json

@@ -2,7 +2,7 @@
   "name": "com.coffee.ui-particle",
   "displayName": "UI Particle",
   "description": "This package provides a component to render particle effects for uGUI.\nThe particle rendering is maskable and sortable, without the need for an extra Camera, RenderTexture, or Canvas.",
-  "version": "4.9.0",
+  "version": "4.12.0",
   "unity": "2018.2",
   "license": "MIT",
   "repository": {

ProjectSettings/MinimalResourceSettings.json

@@ -0,0 +1,11 @@
+{
+    "MonoBehaviour": {
+        "m_Enabled": true,
+        "m_EditorHideFlags": 0,
+        "m_Name": "",
+        "m_EditorClassIdentifier": "",
+        "m_OutputDllPaths": [
+            "Packages/com.coffee.ui-particle/Runtime/Coffee.UIParticle.R.dll"
+        ]
+    }
+}

ProjectSettings/ProjectSettings.asset

@@ -124,7 +124,7 @@ PlayerSettings:
   bundleVersion: 1.0
   preloadedAssets:
   - {fileID: 11400000, guid: 86087a0847f384b538391745dad4565c, type: 2}
-  - {fileID: 11400000, guid: e8e7744b163af4869b07b8f192c810ed, type: 2}
+  - {fileID: 11400000, guid: 4b9df7b8a4193489299b8f477348ae0c, type: 2}
   metroInputSource: 0
   wsaTransparentSwapchain: 0
   m_HolographicPauseOnTrackingLoss: 1