chore(release): 5.0.0-preview.17 [skip ci]

# [5.0.0-preview.17](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/5.0.0-preview.16...5.0.0-preview.17) (2026-06-08)

### Bug Fixes

* add `meshCleared` flag to optimize mesh clearing ([859fa20](859fa20d29))
* add early return for case where subEmitter module is disabled ([d1386a1](d1386a1221))
* avoid endless loop ([eb2e862](eb2e862e80)), closes [#392](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/392)
* fix icon ([a9461ec](a9461ecb4d))
* fix Unity6.5 compile errors and warnings ([a5ee687](a5ee687821)), closes [#400](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/400)
* fix URL link in README ([a79ffb2](a79ffb2c2b))
* fix URL link in README ([1c8c65d](1c8c65d25e)), closes [#376](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/376)
* fix: second and subsequent bursts not displayed when world simulation and non-looping ([df2f3ca](df2f3caafb)), closes [#326](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/326)
* ignore "EditorOnly" tagged gameObjects on refresh ([031d46a](031d46a321))
* potential access to UIParticleRenderer that has already been destroyed ([b740dd6](b740dd662d)), closes [#403](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/403)
* 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](38aec2ea1a))
* updated support for some changed menu paths ([f8ac986](f8ac9869f1)), closes [#397](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/397)

### Features

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

.github/CODEOWNERS

@@ -0,0 +1,6 @@
+# This is a comment.
+# Each line is a file pattern followed by one or more owners.
+# https://docs.github.com/ja/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+# Default owners
+* @mob-sakai

.github/FUNDING.yml

@@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: mob-sakai # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: mob_sakai # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,35 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: mob-sakai
+
+---
+
+NOTE: Your issue may already be reported! Please search on the [issue tracker](../) before creating one.
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Environment (please complete the following information):**
+ - Version [e.g. 1.0.0]
+ - Platform: [e.g. Editor(Windows/Mac), Standalone(Windows/Mac), iOS, Android, WebGL]
+ - Unity version: [e.g. 2018.2.8f1]
+ - Build options: [e.g. IL2CPP, .Net 4.x, LWRP]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,22 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: mob-sakai
+
+---
+
+NOTE: Your issue may already be reported! Please search on the [issue tracker](../) before creating one.
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,16 @@
+---
+name: Question
+about: Ask a question about this project
+title: ''
+labels: question
+assignees: mob-sakai
+
+---
+
+NOTE: Your issue may already be reported! Please search on the [issue tracker](../) before creating one.
+
+**Describe what help do you need**
+A description of the question.
+
+**Additional context**
+Add any other context or screenshots about the question here.

.github/pull_request_template.md

@@ -0,0 +1,37 @@
+
+# Pull Request Template
+
+## Description
+
+- Please include a summary of the change and which issue is fixed.
+- Please also include relevant motivation and context.
+- List any dependencies that are required for this change.
+
+Fixes #{issue_number}
+
+## Type of change
+
+Please write the commit message in the format corresponding to the change type.
+Please see [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) for more information.
+
+- [ ] Bug fix (non-breaking change which fixes an issue)  
+- [ ] New feature (non-breaking change which adds functionality)  
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Update documentations
+- [ ] Others (refactoring, style changes, etc.)
+
+## Test environment
+
+- Platform: [e.g. Editor(Windows/Mac), Standalone(Windows/Mac), iOS, Android, WebGL]
+- Unity version: [e.g. 2022.2.0f1]
+- Build options: [e.g. IL2CPP, .Net 4.x, URP/HDRP]
+
+## Checklist
+
+- [ ] This pull request is for merging into the `develop` branch
+- [ ] My code follows the style guidelines of this project
+- [ ] I have performed a self-review of my own code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation
+- [ ] My changes generate no new warnings
+- [ ] I have checked my code and corrected any misspellings

.github/workflows/deploy.yml

@@ -0,0 +1,28 @@
+name: 🚀 Deploy with Zip
+
+on:
+  workflow_dispatch:
+    inputs:
+      zip:
+        description: "The url to the zip file"
+        required: true
+
+jobs:
+  deploy:
+    name: 🚀 Deploy
+    runs-on: ubuntu-latest
+    permissions:
+      pages: write
+      id-token: write
+    steps:
+      - name: 📦 Download zip file To '_site'
+        run: |
+          curl -L ${{ github.event.inputs.zip }} -o _site.zip
+          unzip _site.zip -d _site
+          find _site -name __MACOSX | xargs rm -rf
+
+      - name: 📦 Upload '_site'
+        uses: actions/upload-pages-artifact@v3
+
+      - name: 🚀 Deploy To GitHub Pages
+        uses: actions/deploy-pages@v4

.github/workflows/release.yml

@@ -5,8 +5,9 @@ on:
   workflow_dispatch:
   push:
     branches:
-      - release
-      - release-*
+      - preview
+      - main
+      - v*.x
     tags-ignore:
       - "**"
 
@@ -22,15 +23,12 @@ jobs:
       channel: ${{ steps.release.outputs.new_release_channel }}
       released: ${{ steps.release.outputs.new_release_published }}
       tag: ${{ steps.release.outputs.new_release_git_tag }}
-      version: ${{ steps.release.outputs.new_release_version }}
-      merge_to: ${{ steps.summary.outputs.merge_to }}
-      split_to: ${{ steps.summary.outputs.split_to }}
     steps:
       - name: 🚚 Checkout (${{ github.ref_name }})
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: 🔖 Run semantic release
-        uses: cycjimmy/semantic-release-action@v4
+        uses: cycjimmy/semantic-release-action@v6
         id: release
         with:
           working_directory: Packages/src
@@ -38,64 +36,9 @@ jobs:
             @semantic-release/changelog
             @semantic-release/git
         env:
-          GITHUB_TOKEN: ${{ github.token }}
+          GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
 
-      - id: summary
-        run: |
+      - run: |
           echo "🔖 New release published: '${{ steps.release.outputs.new_release_published }}'" | tee -a $GITHUB_STEP_SUMMARY
-          echo "🔖 New release version: '${{ steps.release.outputs.new_release_version }}'" | tee -a $GITHUB_STEP_SUMMARY
           echo "🔖 New release channel: '${{ steps.release.outputs.new_release_channel }}'" | tee -a $GITHUB_STEP_SUMMARY
           echo "🔖 New release git tag: '${{ steps.release.outputs.new_release_git_tag }}'" | tee -a $GITHUB_STEP_SUMMARY
-          
-          if [ '${{ 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 $GITHUB_STEP_SUMMARY
-            echo "split_to=main" | tee -a $GITHUB_OUTPUT $GITHUB_STEP_SUMMARY
-          else
-            channel=$(echo ${{ github.ref_name }} | sed 's/^release-//')
-            echo "merge_to=develop-${channel}" | tee -a $GITHUB_OUTPUT $GITHUB_STEP_SUMMARY
-            echo "split_to=${channel}" | tee -a $GITHUB_OUTPUT $GITHUB_STEP_SUMMARY
-          fi
-
-  merge-to:
-    if: needs.release.outputs.merge_to != ''
-    needs: release
-    name: 🔀 Merge to ${{ needs.release.outputs.merge_to }}
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-    steps:
-      - name: 🚚 Checkout (${{ needs.release.outputs.merge_to }})
-        uses: actions/checkout@v4
-        with:
-          ref: ${{ needs.release.outputs.merge_to }}
-          fetch-depth: 0
-      - name: 🔀 Merge '${{ needs.release.outputs.tag }}' into '${{ needs.release.outputs.merge_to }}'
-        run: |
-          git config --local user.email "github-actions[bot]@users.noreply.github.com"
-          git config --local user.name "github-actions[bot]"
-          
-          git merge ${{ needs.release.outputs.tag }}
-          git push origin ${{ needs.release.outputs.merge_to }}
-
-  split-to:
-    if: needs.release.outputs.split_to != ''
-    needs: release
-    name: 🔀 Split package to ${{ needs.release.outputs.split_to }}
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-    steps:
-      - name: 🚚 Checkout (${{ needs.release.outputs.tag }})
-        uses: actions/checkout@v4
-        with:
-          ref: ${{ needs.release.outputs.tag }}
-          fetch-depth: 0
-      - name: 🔀 Split subtree 'Packages/src' to '${{ needs.release.outputs.split_to }}'
-        run: |
-          split_to=${{ needs.release.outputs.split_to }}
-          git branch $split_to origin/$split_to
-          git subtree split --prefix=Packages/src --branch $split_to
-          git tag ${{ needs.release.outputs.version }} $split_to
-          git push origin ${{ needs.release.outputs.version }} $split_to:$split_to

.github/workflows/test.yml

@@ -3,29 +3,37 @@
 #   UNITY_EMAIL: Unity user email to login
 #   UNITY_PASSWORD: Unity user password to login
 name: 🧪 Test
-run-name: 🧪 Test (${{ github.ref_name }})
+run-name: 🧪 Test (${{ github.event.pull_request.title || github.ref_name }})
 
 env:
   # MINIMUM_VERSION: The minimum version of Unity.
-  MINIMUM_VERSION: 2019.4
+  MINIMUM_VERSION: 2020.3
   # EXCLUDE_FILTER: The excluded versions of Unity.
-  EXCLUDE_FILTER: '(2020.2.0|2021.1|2023.3)'
+  EXCLUDE_FILTER: "(2017|2018|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-4.x
+      - "develop-*"
     tags:
       - "!*"
     paths-ignore:
-      - "*.md"
-  pull_request:
+      - "**.md"
+  pull_request_target:
     types:
       - opened
+      - reopened
       - synchronize
+    paths-ignore:
+      - "**.md"
 
 jobs:
   setup:
@@ -38,9 +46,12 @@ jobs:
         id: setup
         run: |
           echo "==== Target Unity Versions ===="
-          LATEST_VERSIONS=`npx unity-changeset list --versions --latest-patch --min ${MINIMUM_VERSION} --json --all`
-          # ADDITIONAL_VERSIONS=`npx unity-changeset list --versions --grep '0f' --min ${MINIMUM_VERSION} --json`
-          ADDITIONAL_VERSIONS=[]
+          LATEST_VERSIONS=`npx unity-changeset@latest list --versions --latest-patch --min ${MINIMUM_VERSION} --json --all --ignore-alpha`
+          if [ "${{ inputs.usePeriodVersions }}" = "true" ]; then
+            ADDITIONAL_VERSIONS=`npx unity-changeset list --versions --grep '0f' --min ${MINIMUM_VERSION} --json --ignore-alpha`
+          else
+            ADDITIONAL_VERSIONS=[]
+          fi
 
           VERSIONS=`echo "[${LATEST_VERSIONS}, ${ADDITIONAL_VERSIONS}]" \
             | jq -c '[ flatten | sort | unique | .[] | select( test("${{ env.EXCLUDE_FILTER }}") | not ) ]'`
@@ -49,40 +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
-        uses: actions/checkout@v4
+      - name: 🚚 Checkout ($${{ github.ref }})
+        if: github.event_name == 'push'
+        uses: actions/checkout@v6
+
+      - name: 🚚 Checkout pull request (pull_request_target)
+        if: github.event_name == 'pull_request_target'
+        uses: actions/checkout@v6
+        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
+        uses: actions/cache@v5
         with:
-          path: Library
-          key: Library-${{ matrix.unityVersion }}-${{ github.sha }}
+          path: ${{ env.PROJECT_PATH }}/Library
+          key: ${{ env.PROJECT_PATH }}-Library-${{ matrix.unityVersion }}-${{ github.event.pull_request.head.sha || github.sha }}
           restore-keys: |
-            Library-${{ matrix.unityVersion }}-
-            Library-
+            ${{ env.PROJECT_PATH }}-Library-${{ matrix.unityVersion }}-
+            ${{ env.PROJECT_PATH }}-Library-
 
-      - name: 🛠️ Build Unity Project
-        uses: game-ci/unity-builder@v4
+      - name: 🛠️ Build Unity Project (Test)
+        uses: game-ci/unity-builder@v5
         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
@@ -93,4 +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/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 FindObjectsByType<ParticleSystem>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-                foreach (var ps in FindObjectsOfType<ParticleSystem>())
-#endif
+                foreach (var ps in Misc.FindObjectsOfType<ParticleSystem>())
                 {
                     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 FindObjectsByType<ParticleSystem>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-            foreach (var ps in FindObjectsOfType<ParticleSystem>())
-#endif
+            foreach (var ps in Misc.FindObjectsOfType<ParticleSystem>())
             {
                 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

@@ -10,7 +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_EnableLinearToGamma: 1
   m_HideGeneratedObjects: 1

Assets/ProjectSettings/UIParticleProjectSettings.asset.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 4b9df7b8a4193489299b8f477348ae0c
+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
-        [Test]
-        public void NewTestScriptSimplePasses()
+        [TestCase(-1)]
+        [TestCase(0)]
+        [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

@@ -1,6 +1,7 @@
 {
   "dependencies": {
     "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.unity.ide.rider": "3.0.31",
     "com.unity.test-framework": "1.1.33",

Packages/packages-lock.json

@@ -5,7 +5,14 @@
       "depth": 0,
       "source": "git",
       "dependencies": {},
-      "hash": "4e5f735ccf956ee469b5014ae781068c49a2825d"
+      "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",
@@ -14,7 +21,7 @@
       "dependencies": {
         "com.unity.ugui": "1.0.0"
       },
-      "hash": "4e5f735ccf956ee469b5014ae781068c49a2825d"
+      "hash": "3c280f1a8f4db5038b881ff07f270efd9638fa31"
     },
     "com.coffee.ui-particle": {
       "version": "file:src",

Packages/src/.releaserc.json

@@ -1,12 +1,13 @@
 {
   "branches": [
-    "release",
-    "release-4.x",
+    "main",
+    "[0-9]+.x",
     {
-      "name": "release-preview",
-      "prerelease": "preview"
+      "name": "preview",
+      "prerelease": true
     }
   ],
+  "tagFormat": "${version}",
   "plugins": [
     "@semantic-release/commit-analyzer",
     "@semantic-release/release-notes-generator",

Packages/src/CHANGELOG.md

@@ -1,3 +1,103 @@
+# [5.0.0-preview.17](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/5.0.0-preview.16...5.0.0-preview.17) (2026-06-08)
+
+
+### Bug Fixes
+
+* add `meshCleared` flag to optimize mesh clearing ([859fa20](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/859fa20d297c3f44e3361f20dbb7ce966407e03e))
+* 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)
+* fix icon ([a9461ec](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/a9461ecb4d40d7fe878e12465d6e38faae7ae65b))
+* fix Unity6.5 compile errors and warnings ([a5ee687](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/a5ee6878212be2fc4d7b48879426f239e8753009)), closes [#400](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/400)
+* fix URL link in README ([a79ffb2](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/a79ffb2c2b4c26f23d2925cb18674fda5d8bc9cb))
+* 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)
+* ignore "EditorOnly" tagged gameObjects on refresh ([031d46a](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/031d46a3216c942d2d1a6ccfadf5f0b9e3ce3006))
+* potential access to UIParticleRenderer that has already been destroyed ([b740dd6](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/b740dd662d423c6bef849662ce1b0bfbb4940ed4)), closes [#403](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/403)
+* 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))
+* updated support for some changed menu paths ([f8ac986](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/f8ac9869f141238169730e74f5d65c4fc6081f51)), closes [#397](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/397)
+
+
+### Features
+
+* explicit null checks ([5384f61](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/5384f61c569e9f78ff9d5b45acfc6f5c2f021a87))
+
+# [5.0.0-preview.16](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/5.0.0-preview.15...5.0.0-preview.16) (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)
+
+# [5.0.0-preview.15](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/5.0.0-preview.14...5.0.0-preview.15) (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))
+* 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)
+
+
+### Features
+
+* add 'TimeScaleMultiplier' option ([925af0b](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/925af0b6046f65f23a778f67cefa8ff9cbedb513))
+
+# [5.0.0-preview.14](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/5.0.0-preview.13...5.0.0-preview.14) (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)
+
+# [5.0.0-preview.13](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/5.0.0-preview.12...5.0.0-preview.13) (2025-01-03)
+
+
+### Features
+
+* change the default value of `UIParticle.scale` from `10` to `1` ([9955eef](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/9955eefdc22cf565502f85c87cd2efd3a25fbe50))
+* UIParticle no longer inherits from MaskableGraphic ([c09bfb8](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/c09bfb81abc9179bf5fc49d29eaf7fc4ed01a4dc))
+
+
+### BREAKING CHANGES
+
+* Some members inherited from MaskableGraphic will no longer be available.
+
+## [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)
 
 

Packages/src/Editor/AnimatablePropertyEditor.cs

@@ -76,12 +76,21 @@ namespace Coffee.UIExtensions
             for (var j = 0; j < mats.Count; j++)
             {
                 var mat = mats[j];
-                if (!mat || !mat.shader) continue;
+                if (mat == null || mat.shader == null) continue;
 
+#if UNITY_6000_5_OR_NEWER
+                for (var i = 0; i < mat.shader.GetPropertyCount(); i++)
+#else
                 for (var i = 0; i < ShaderUtil.GetPropertyCount(mat.shader); i++)
+#endif
                 {
+#if UNITY_6000_5_OR_NEWER
+                    var name = mat.shader.GetPropertyName(i);
+                    var type = (AnimatableProperty.ShaderPropertyType)mat.shader.GetPropertyType(i);
+#else
                     var name = ShaderUtil.GetPropertyName(mat.shader, i);
                     var type = (AnimatableProperty.ShaderPropertyType)ShaderUtil.GetPropertyType(mat.shader, i);
+#endif
                     if (!s_Names.Add(name)) continue;
 
                     AddMenu(gm, sp, new ShaderProperty(name, type), true);

Packages/src/Editor/UIParticleEditor.cs

@@ -2,7 +2,6 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.RegularExpressions;
 using UnityEditor;
-using UnityEditor.UI;
 using UnityEditorInternal;
 using UnityEngine;
 using UnityEngine.Profiling;
@@ -26,8 +25,13 @@ namespace Coffee.UIExtensions
 {
     [CustomEditor(typeof(UIParticle))]
     [CanEditMultipleObjects]
-    internal class UIParticleEditor : GraphicEditor
+    internal class UIParticleEditor : Editor
     {
+        internal class State : ScriptableSingleton<State>
+        {
+            public bool is3DScaleMode;
+        }
+
         //################################
         // Constant or Static Members.
         //################################
@@ -46,7 +50,6 @@ 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;
@@ -58,8 +61,10 @@ 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
@@ -81,10 +86,8 @@ namespace Coffee.UIExtensions
         /// <summary>
         /// This function is called when the object becomes enabled and active.
         /// </summary>
-        protected override void OnEnable()
+        private void OnEnable()
         {
-            base.OnEnable();
-
             _maskable = serializedObject.FindProperty("m_Maskable");
             _scale3D = serializedObject.FindProperty("m_Scale3D");
             _animatableProperties = serializedObject.FindProperty("m_AnimatableProperties");
@@ -95,6 +98,7 @@ 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)
@@ -103,7 +107,7 @@ 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;
                     }
@@ -117,7 +121,7 @@ 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;
@@ -163,6 +167,19 @@ 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>
@@ -171,7 +188,7 @@ 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();
@@ -181,7 +198,11 @@ 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
@@ -222,6 +243,9 @@ namespace Coffee.UIExtensions
                 _customViewSize.floatValue = Mathf.Max(0.1f, _customViewSize.floatValue);
             }
 
+            // Time Scale Multiplier
+            EditorGUILayout.PropertyField(_timeScaleMultiplier);
+
             // Target ParticleSystems.
             EditorGUI.BeginChangeCheck();
             _ro.DoLayoutList();
@@ -240,7 +264,7 @@ 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/"))
                 {
@@ -259,7 +283,7 @@ 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;
 
@@ -437,9 +461,11 @@ namespace Coffee.UIExtensions
         {
             if (!p || (ignoreCurrent && target == p)) return;
 
-            var cr = p.canvasRenderer;
-            DestroyImmediate(p);
-            DestroyImmediate(cr);
+            Misc.DestroyImmediate(p);
+            if (p.TryGetComponent<CanvasRenderer>(out var cr))
+            {
+                Misc.DestroyImmediate(cr);
+            }
 
 #if UNITY_2018_3_OR_NEWER
             var stage = PrefabStageUtility.GetCurrentPrefabStage();

Packages/src/Editor/UIParticleMenu.cs

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

Packages/src/Icons.meta

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

Packages/src/README.md

@@ -1,9 +1,9 @@
-# <img alt="UIParticleIcon" src="https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/d76e105e-a840-4f61-a1f6-8cf311c0812d" width="26"/> Particle Effect For UGUI (UI Particle) <!-- omit in toc -->
+# <img alt="UIParticleIcon" src="https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/d76e105e-a840-4f61-a1f6-8cf311c0812d" width="26"/> UI Particle v5 <!-- omit in toc -->
 
 [![](https://img.shields.io/npm/v/com.coffee.ui-particle?label=openupm&registry_uri=https://package.openupm.com)](https://openupm.com/packages/com.coffee.ui-particle/)
 [![](https://img.shields.io/github/v/release/mob-sakai/ParticleEffectForUGUI)](https://github.com/mob-sakai/ParticleEffectForUGUI/releases)
 [![](https://img.shields.io/github/license/mob-sakai/ParticleEffectForUGUI.svg)](https://github.com/mob-sakai/ParticleEffectForUGUI/blob/main/LICENSE.md)  
-![](https://img.shields.io/badge/Unity-2018.2+-57b9d3.svg?style=flat&logo=unity)
+![](https://img.shields.io/badge/Unity-2019.3+-57b9d3.svg?style=flat&logo=unity)
 ![](https://img.shields.io/badge/uGUI_2.0_Ready-57b9d3.svg?style=flat)
 ![](https://img.shields.io/badge/UPR%2FHDPR_Ready-57b9d3.svg?style=flat)  
 ![](https://github.com/mob-sakai/ParticleEffectForUGUI/actions/workflows/test.yml/badge.svg?branch=develop)
@@ -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) | [🚀 Usage](#-usage) | [🛠 Development Note](#-development-note) | [🤝 Contributing](#-contributing) >>
+<< [📝 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 <!-- omit in toc -->
 
@@ -26,7 +26,9 @@ You can render, mask, and sort your `ParticleSystems` for UI without the need fo
     - [Install via OpenUPM](#install-via-openupm)
     - [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)
+  - [Install as Embedded Package](#install-as-embedded-package)
+- [🔄 Upgrading from v3/v4 to v5](#-upgrading-from-v3v4-to-v5)
+  - [Breaking Changes](#breaking-changes)
 - [🚀 Usage](#-usage)
   - [Component: UIParticle](#component-uiparticle)
   - [Basic Usage](#basic-usage)
@@ -104,7 +106,7 @@ You can render, mask, and sort your `ParticleSystems` for UI without the need fo
 
 ## ⚙ Installation
 
-_This package requires **Unity 2018.3 or later**._
+_This package requires **Unity 2019.3 or later**._
 
 #### Install via OpenUPM
 
@@ -116,16 +118,16 @@ _This package requires **Unity 2018.3 or later**._
   ```
 - To update the package, use Package Manager UI (`Window > Package Manager`) or run the following command with `@{version}`:
   ```
-  openupm add com.coffee.ui-particle@4.9.0
+  openupm add com.coffee.ui-particle@5.0.0
   ```
 
 #### Install via UPM (with Package Manager UI)
 
 - Click `Window > Package Manager` to open Package Manager UI.
-- Click `+ > Add package from git URL...` and input the repository URL: `https://github.com/mob-sakai/ParticleEffectForUGUI.git`  
+- Click `+ > Add package from git URL...` and input the repository URL: `https://github.com/mob-sakai/ParticleEffectForUGUI.git?path=Packages/src`  
   ![](https://github.com/user-attachments/assets/f88f47ad-c606-44bd-9e86-ee3f72eac548)
 - To update the package, change suffix `#{version}` to the target version.
-  - e.g. `https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.9.0`
+  - e.g. `https://github.com/mob-sakai/ParticleEffectForUGUI.git?path=Packages/src#5.0.0`
 
 #### Install via UPM (Manually)
 
@@ -133,22 +135,41 @@ _This package requires **Unity 2018.3 or later**._
   ```json
   {
     "dependencies": {
-      "com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git",
+      "com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git?path=Packages/src",
       ...
     }
   }
   ```
 
 - To update the package, change suffix `#{version}` to the target version.
-  - e.g. `"com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.9.0",`
+  - e.g. `"com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git?path=Packages/src#5.0.0",`
 
-#### Install as Embedded Package
+### Install as Embedded Package
 
-1. Download a source code zip file from [Releases](https://github.com/mob-sakai/ParticleEffectForUGUI.git/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.
-- To update the package, you need to re-download it and replace the contents.
+1. Download the `Source code (zip)` file from [Releases](https://github.com/mob-sakai/ParticleEffectForUGUI/releases) and
+   extract it.
+2. Move the `<extracted_dir>/Packages/src` directory into your project's `Packages` directory.  
+   ![](https://github.com/user-attachments/assets/187cbcbe-5922-4ed5-acec-cf19aa17d208)
+    - You can rename the `src` directory if needed.
+    - If you intend to fix bugs or add features, installing it as an embedded package is recommended.
+    - To update the package, re-download it and replace the existing contents.
+
+<br><br>
+
+## 🔄 Upgrading from v3/v4 to v5
+
+### Breaking Changes
+
+- The default value of `UIParticle.scale` has been changed from `10` to `1`.
+- `UIParticle` no longer inherits from `MaskableGraphic`.
+- If you are installing via git URL, add `?path=Packages/src`.
+   ```json
+   // v3/v4
+   "com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git",
+   
+   // v5
+   "com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git?path=Packages/src",
+   ```
 
 <br><br>
 
@@ -158,7 +179,7 @@ _This package requires **Unity 2018.3 or later**._
 
 `UIParticle` controls the ParticleSystems that are attached to its own game objects and child game objects.
 
-![](https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/1cf5753b-33fc-4cef-91c3-413c515a954f)
+![](https://github.com/user-attachments/assets/bc9eb783-afce-4102-ac61-aee9ea8d6f2f)
 
 - **Maskable**: Does this graphic allow maskable.
 - **Scale**: Scale the rendering particles. When the `3D` toggle is enabled, 3D scale (x, y, z) is supported.
@@ -180,6 +201,7 @@ _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
@@ -210,7 +232,7 @@ 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)

Packages/src/Runtime/AnimatableProperty.cs

@@ -37,37 +37,17 @@ namespace Coffee.UIExtensions
             switch (type)
             {
                 case ShaderPropertyType.Color:
-                    var color = mpb.GetColor(id);
-                    if (color != default)
-                    {
-                        material.SetColor(id, color);
-                    }
-
+                    material.SetColor(id, mpb.GetColor(id));
                     break;
                 case ShaderPropertyType.Vector:
-                    var vector = mpb.GetVector(id);
-                    if (vector != default)
-                    {
-                        material.SetVector(id, vector);
-                    }
-
+                    material.SetVector(id, mpb.GetVector(id));
                     break;
                 case ShaderPropertyType.Float:
                 case ShaderPropertyType.Range:
-                    var value = mpb.GetFloat(id);
-                    if (!Mathf.Approximately(value, 0))
-                    {
-                        material.SetFloat(id, value);
-                    }
-
+                    material.SetFloat(id,  mpb.GetFloat(id));
                     break;
                 case ShaderPropertyType.Texture:
-                    var tex = mpb.GetTexture(id);
-                    if (tex != default(Texture))
-                    {
-                        material.SetTexture(id, tex);
-                    }
-
+                    material.SetTexture(id, mpb.GetTexture(id));
                     break;
             }
         }

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;
@@ -157,7 +186,7 @@ namespace Coffee.UIParticleInternal
         /// </summary>
         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/GraphicExtensions.cs

@@ -1,125 +0,0 @@
-using System.Collections.Generic;
-using UnityEditor;
-using UnityEngine;
-using UnityEngine.Profiling;
-using UnityEngine.UI;
-
-namespace Coffee.UIParticleInternal
-{
-    /// <summary>
-    /// Extension methods for Graphic class.
-    /// </summary>
-    internal static class GraphicExtensions
-    {
-        private static readonly Vector3[] s_WorldCorners = new Vector3[4];
-        private static readonly Bounds s_ScreenBounds = new Bounds(new Vector3(0.5f, 0.5f, 0.5f), new Vector3(1, 1, 1));
-
-        /// <summary>
-        /// Check if a Graphic component is currently in the screen view.
-        /// </summary>
-        public static void GetMaterialsForRendering(this Graphic self, List<Material> result)
-        {
-            result.Clear();
-            if (!self) return;
-
-            var cr = self.canvasRenderer;
-            var count = cr.materialCount;
-            var popCount = cr.popMaterialCount;
-
-            if (result.Capacity < count + popCount)
-            {
-                result.Capacity = count + popCount;
-            }
-
-            for (var i = 0; i < count; i++)
-            {
-                result.Add(cr.GetMaterial(i));
-            }
-
-            for (var i = 0; i < popCount; i++)
-            {
-                result.Add(cr.GetPopMaterial(i));
-            }
-        }
-
-        /// <summary>
-        /// Check if a Graphic component is currently in the screen view.
-        /// </summary>
-        public static bool IsInScreen(this Graphic self)
-        {
-            if (!self || !self.canvas) return false;
-
-            if (FrameCache.TryGet(self, nameof(IsInScreen), out bool result))
-            {
-                return result;
-            }
-
-            Profiler.BeginSample("(COF)[GraphicExt] IsInScreen");
-            var cam = self.canvas.renderMode != RenderMode.ScreenSpaceOverlay
-                ? self.canvas.worldCamera
-                : null;
-            var min = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
-            var max = new Vector3(float.MinValue, float.MinValue, float.MinValue);
-            self.rectTransform.GetWorldCorners(s_WorldCorners);
-            var screenSize = GetScreenSize();
-            for (var i = 0; i < 4; i++)
-            {
-                if (cam)
-                {
-                    s_WorldCorners[i] = cam.WorldToViewportPoint(s_WorldCorners[i]);
-                }
-                else
-                {
-                    s_WorldCorners[i] = RectTransformUtility.WorldToScreenPoint(null, s_WorldCorners[i]);
-                    s_WorldCorners[i].x /= screenSize.x;
-                    s_WorldCorners[i].y /= screenSize.y;
-                }
-
-                s_WorldCorners[i].z = 0;
-                min = Vector3.Min(s_WorldCorners[i], min);
-                max = Vector3.Max(s_WorldCorners[i], max);
-            }
-
-            var bounds = new Bounds(min, Vector3.zero);
-            bounds.Encapsulate(max);
-            result = bounds.Intersects(s_ScreenBounds);
-            FrameCache.Set(self, nameof(IsInScreen), result);
-            Profiler.EndSample();
-
-            return result;
-        }
-
-        /// <summary>
-        /// Get the actual main texture of a Graphic component.
-        /// </summary>
-        public static Texture GetActualMainTexture(this Graphic self)
-        {
-            var image = self as Image;
-            if (image == null) return self.mainTexture;
-
-            var sprite = image.overrideSprite;
-            return sprite ? sprite.GetActualTexture() : self.mainTexture;
-        }
-
-        private static Vector2Int GetScreenSize()
-        {
-#if UNITY_EDITOR
-            if (!Application.isPlaying && !Camera.current)
-            {
-                var res = UnityStats.screenRes.Split('x');
-                return new Vector2Int(int.Parse(res[0]), int.Parse(res[1]));
-            }
-#endif
-            return new Vector2Int(Screen.width, Screen.height);
-        }
-
-        public static float GetParentGroupAlpha(this Graphic self)
-        {
-            var alpha = self.canvasRenderer.GetAlpha();
-            if (Mathf.Approximately(alpha, 0)) return 1;
-
-            var inheritedAlpha = self.canvasRenderer.GetInheritedAlpha();
-            return Mathf.Clamp01(inheritedAlpha / alpha);
-        }
-    }
-}

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

@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 3803b037cd2ed45459dd660072f223dd
-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
-            .GetMethod("GetActiveAtlasTexture", BindingFlags.Static | BindingFlags.NonPublic);
+        private static readonly Func<Sprite, Texture2D> s_GetActiveAtlasTextureMethod =
+            (Func<Sprite, Texture2D>)Delegate.CreateDelegate(typeof(Func<Sprite, Texture2D>),
+                s_SpriteEditorExtensionType
+                    .GetMethod("GetActiveAtlasTexture", BindingFlags.Static | BindingFlags.NonPublic));
 
-        private static readonly MethodInfo s_GetActiveAtlasMethod = s_SpriteEditorExtensionType
-            .GetMethod("GetActiveAtlas", BindingFlags.Static | BindingFlags.NonPublic);
+        private static readonly Func<Sprite, SpriteAtlas> s_GetActiveAtlasMethod =
+            (Func<Sprite, SpriteAtlas>)Delegate.CreateDelegate(typeof(Func<Sprite, SpriteAtlas>),
+                s_SpriteEditorExtensionType
+                    .GetMethod("GetActiveAtlas", BindingFlags.Static | BindingFlags.NonPublic));
 
         /// <summary>
         /// Get the actual texture of a sprite in play mode or edit mode.
         /// </summary>
         public static Texture2D GetActualTexture(this Sprite self)
         {
-            if (!self) return null;
+            if (self == null) return null;
 
-            if (Application.isPlaying) return self.texture;
-
-            var ret = s_GetActiveAtlasTextureMethod.Invoke(null, new object[] { self }) as Texture2D;
-            return ret ? ret : self.texture;
+            var ret = s_GetActiveAtlasTextureMethod(self);
+            return ret != null ? 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)
                 {
                     // When create a new instance, automatically set it as default settings.
-                    defaultSettings = t.GetProperty("instance", flags)
-                        ?.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();
         }
 
@@ -68,12 +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) return;
+            if (asset == null) return;
+
             var type = asset.GetType();
             if (string.IsNullOrEmpty(AssetDatabase.GetAssetPath(asset)))
             {
@@ -84,13 +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()
@@ -98,6 +111,14 @@ namespace Coffee.UIParticleInternal
 
             AssetDatabase.Refresh();
         }
+
+        protected virtual void OnCreateAsset()
+        {
+        }
+
+        protected virtual void OnInitialize()
+        {
+        }
     }
 #else
     {
@@ -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;
@@ -135,6 +158,8 @@ namespace Coffee.UIParticleInternal
 
         private void OnPlayModeStateChanged(PlayModeStateChange state)
         {
+            if (!this) return;
+
             switch (state)
             {
                 case PlayModeStateChange.ExitingEditMode:
@@ -151,7 +176,7 @@ 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 +185,7 @@ 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 +195,7 @@ namespace Coffee.UIParticleInternal
             EditorApplication.playModeStateChanged += OnPlayModeStateChanged;
 #endif
 
-            if (s_Instance) return;
+            if (s_Instance != null) return;
             s_Instance = this as T;
         }
 
@@ -199,7 +224,7 @@ 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 =
-            new ObjectPool<LinkedListNode<T>>(() => new LinkedListNode<T>(default), _ => true, x => x.Value = default);
+        private static readonly InternalObjectPool<LinkedListNode<T>> s_NodePool =
+            new InternalObjectPool<LinkedListNode<T>>(() => new LinkedListNode<T>(default), _ => true,
+                x => x.Value = default);
 
         private readonly LinkedList<T> _delegates = new LinkedList<T>();
 

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

@@ -11,7 +11,7 @@ using Conditional = System.Diagnostics.ConditionalAttribute;
 
 namespace Coffee.UIParticleInternal
 {
-    internal static class Logging
+    internal static class Logger
     {
 #if !ENABLE_COFFEE_LOGGER
         private const string k_DisableSymbol = "DISABLE_COFFEE_LOGGER";
@@ -48,7 +48,7 @@ namespace Coffee.UIParticleInternal
         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
@@ -56,7 +56,7 @@ namespace Coffee.UIParticleInternal
 #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
@@ -64,13 +64,13 @@ namespace Coffee.UIParticleInternal
 #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

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

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 4f9f22bb079324476b1473030ad9fec3

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

@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 8255313895da84e7cbdc876be3795334
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

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();
         }

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

@@ -0,0 +1,134 @@
+using System;
+using System.Diagnostics;
+using UnityEditor;
+using UnityEngine;
+using Object = UnityEngine.Object;
+#if UNITY_EDITOR
+using System.IO;
+using System.Linq;
+using System.Reflection;
+#if UNITY_2021_2_OR_NEWER
+using UnityEditor.SceneManagement;
+#else
+using UnityEditor.Experimental.SceneManagement;
+#endif
+#endif
+
+namespace Coffee.UIParticleInternal
+{
+    internal static class Misc
+    {
+        public static T[] FindObjectsOfType<T>() where T : Object
+        {
+#if UNITY_6000_4_OR_NEWER
+            return Object.FindObjectsByType<T>(FindObjectsInactive.Include);
+#elif UNITY_2023_1_OR_NEWER
+            return Object.FindObjectsByType<T>(FindObjectsInactive.Include, FindObjectsSortMode.None);
+#else
+            return Object.FindObjectsOfType<T>();
+#endif
+        }
+
+        public static void Destroy(Object obj)
+        {
+            if (obj == null) return;
+#if UNITY_EDITOR
+            if (!Application.isPlaying)
+            {
+                Object.DestroyImmediate(obj);
+            }
+            else
+#endif
+            {
+                Object.Destroy(obj);
+            }
+        }
+
+        public static void DestroyImmediate(Object obj)
+        {
+            if (obj == null) return;
+#if UNITY_EDITOR
+            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.
+            Logger.Log(this, $"A new instance is created (pooled: {_pool.CountInactive}, created: {_pool.CountAll}).");
+            return _pool.Get();
+        }
+
+        /// <summary>
+        /// Return an instance to the pool and assign null.
+        /// Be sure to return the instance obtained with <see cref="Rent" /> with this method.
+        /// </summary>
+        public void Return(ref T instance)
+        {
+            if (instance == null) return; // Ignore if already pooled or null.
+
+            _pool.Release(instance);
+            Logger.Log(this, $"An instance is released (pooled: {_pool.CountInactive}, created: {_pool.CountAll}).");
+            instance = default; // Set the reference to null.
+        }
+#else
         private readonly Func<T> _onCreate; // Delegate for creating instances
         private readonly Action<T> _onReturn; // Delegate for returning instances to the pool
         private readonly Predicate<T> _onValid; // Delegate for checking if instances are valid
         private readonly Stack<T> _pool = new Stack<T>(32); // Object pool
         private int _count; // Total count of created instances
 
-        public 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;
@@ -37,7 +80,7 @@ namespace Coffee.UIParticleInternal
             }
 
             // If there are no instances in the pool, create a new one.
-            Logging.Log(this, $"A new instance is created (pooled: {_pool.Count}, created: {++_count}).");
+            Logger.Log(this, $"A new instance is created (pooled: {_pool.Count}, created: {++_count}).");
             return _onCreate();
         }
 
@@ -51,18 +94,43 @@ namespace Coffee.UIParticleInternal
 
             _onReturn(instance); // Return the instance to the pool.
             _pool.Push(instance);
-            Logging.Log(this, $"An instance is released (pooled: {_pool.Count}, created: {_count}).");
+            Logger.Log(this, $"An instance is released (pooled: {_pool.Count}, created: {_count}).");
             instance = default; // Set the reference to null.
         }
+#endif
     }
 
     /// <summary>
     /// Object pool for <see cref="List{T}" />.
     /// </summary>
-    internal static class ListPool<T>
+    internal static class InternalListPool<T>
     {
-        private static readonly ObjectPool<List<T>> s_ListPool =
-            new ObjectPool<List<T>>(() => new List<T>(), _ => true, x => x.Clear());
+#if UNITY_2021_1_OR_NEWER
+        /// <summary>
+        /// Rent an instance from the pool.
+        /// When you no longer need it, return it with <see cref="Return" />.
+        /// </summary>
+        public static List<T> Rent()
+        {
+            return UnityEngine.Pool.ListPool<T>.Get();
+        }
+
+        /// <summary>
+        /// Return an instance to the pool and assign null.
+        /// Be sure to return the instance obtained with <see cref="Rent" /> with this method.
+        /// </summary>
+        public static void Return(ref List<T> toRelease)
+        {
+            if (toRelease != null)
+            {
+                UnityEngine.Pool.ListPool<T>.Release(toRelease);
+            }
+
+            toRelease = null;
+        }
+#else
+        private static readonly InternalObjectPool<List<T>> s_ListPool =
+            new InternalObjectPool<List<T>>(() => new List<T>(), _ => true, x => x.Clear());
 
         /// <summary>
         /// Rent an instance from the pool.
@@ -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();
@@ -103,7 +103,7 @@ namespace Coffee.UIParticleInternal
                     Release(ref obj);
                     ++entry.reference;
                     obj = entry.storedObject;
-                    Logging.Log(_name, $"Get(total#{count}): {entry}");
+                    Logger.Log(_name, $"Get(total#{count}): {entry}");
                 }
 
                 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;
@@ -130,8 +130,8 @@ namespace Coffee.UIParticleInternal
             newEntry.hash = hash;
             newEntry.reference = 1;
             _cache[hash] = newEntry;
-            _objectKey[newObject.GetInstanceID()] = hash;
-            Logging.Log(_name, $"<color=#03c700>Add</color>(total#{count}): {newEntry}");
+            _objectKey[newObject.GetHashCode()] = hash;
+            Logger.Log(_name, $"<color=#03c700>Add</color>(total#{count}): {newEntry}");
             Release(ref obj);
             obj = newObject;
             Profiler.EndSample();
@@ -146,23 +146,23 @@ namespace Coffee.UIParticleInternal
 
             // Find and release the entry.
             Profiler.BeginSample("(COF)[ObjectRepository] Release");
-            var id = obj.GetInstanceID();
+            var id = obj.GetHashCode();
             if (_objectKey.TryGetValue(id, out var hash)
                 && _cache.TryGetValue(hash, out var entry))
             {
                 entry.reference--;
-                if (entry.reference <= 0 || !entry.storedObject)
+                if (entry.reference <= 0 || entry.storedObject == null)
                 {
                     Remove(entry);
                 }
                 else
                 {
-                    Logging.Log(_name, $"Release(total#{_cache.Count}): {entry}");
+                    Logger.Log(_name, $"Release(total#{_cache.Count}): {entry}");
                 }
             }
             else
             {
-                Logging.Log(_name, $"Release(total#{_cache.Count}): <color=red>Already released: {obj}</color>");
+                Logger.Log(_name, $"Release(total#{_cache.Count}): <color=red>Already released: {obj}</color>");
             }
 
             obj = null;
@@ -175,10 +175,10 @@ namespace Coffee.UIParticleInternal
 
             Profiler.BeginSample("(COF)[ObjectRepository] Remove");
             _cache.Remove(entry.hash);
-            _objectKey.Remove(entry.storedObject.GetInstanceID());
+            _objectKey.Remove(entry.storedObject.GetHashCode());
             _pool.Push(entry);
             entry.reference = 0;
-            Logging.Log(_name, $"<color=#f29e03>Remove</color>(total#{_cache.Count}): {entry}");
+            Logger.Log(_name, $"<color=#f29e03>Remove</color>(total#{_cache.Count}): {entry}");
             entry.Release(_onRelease);
             Profiler.EndSample();
         }
@@ -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

@@ -1,4 +1,5 @@
 using System;
+using System.Reflection;
 using UnityEditor;
 using UnityEngine;
 using UnityEngine.UI;
@@ -14,11 +15,13 @@ 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()
         {
             Canvas.willRenderCanvases += OnBeforeCanvasRebuild;
-            Logging.LogMulticast(typeof(Canvas), "willRenderCanvases", message: "ctor");
+            Logger.LogMulticast(typeof(Canvas), "willRenderCanvases", message: "ctor");
         }
 
         /// <summary>
@@ -48,6 +51,15 @@ 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>
@@ -56,9 +68,17 @@ namespace Coffee.UIParticleInternal
             if (s_IsInitializedAfterCanvasRebuild) return;
             s_IsInitializedAfterCanvasRebuild = true;
 
+            // Explicitly set `Canvas.willRenderCanvases += CanvasUpdateRegistry.PerformUpdate`.
             CanvasUpdateRegistry.IsRebuildingLayout();
+#if TMP_ENABLE
+            // Explicitly set `Canvas.willRenderCanvases += TMP_UpdateManager.DoRebuilds`.
+            typeof(TMPro.TMP_UpdateManager)
+                .GetProperty("instance", BindingFlags.NonPublic | BindingFlags.Static)
+                .GetValue(null);
+#endif
+            Canvas.willRenderCanvases -= OnAfterCanvasRebuild;
             Canvas.willRenderCanvases += OnAfterCanvasRebuild;
-            Logging.LogMulticast(typeof(Canvas), "willRenderCanvases",
+            Logger.LogMulticast(typeof(Canvas), "willRenderCanvases",
                 message: "InitializeAfterCanvasRebuild");
         }
 
@@ -77,6 +97,17 @@ 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 : MaskableGraphic, ISerializationCallbackReceiver
+    public class UIParticle : UIBehaviour, 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(10, 10, 10);
+        private Vector3 m_Scale3D = new Vector3(1, 1, 1);
 
         [Tooltip("If you want to update material properties (e.g. _MainTex_ST, _Color) in AnimationClip, " +
                  "use this to mark as animatable.")]
@@ -117,20 +121,52 @@ namespace Coffee.UIExtensions
                  "Change the bake view size.")]
         private float m_CustomViewSize = 10;
 
+        [SerializeField]
+        [Tooltip("Time scale multiplier.")]
+        private float m_TimeScaleMultiplier = 1;
+
+        [SerializeField]
+        private bool m_Maskable = true;
+
         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;
 
-        /// <summary>
-        /// Should this graphic be considered a target for ray-casting?
-        /// </summary>
-        public override bool raycastTarget
+        public RectTransform rectTransform => transform as RectTransform;
+
+        public Canvas canvas
         {
-            get => false;
-            set { }
+            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.
+        /// </summary>
+        public bool maskable
+        {
+            get => m_Maskable;
+            set
+            {
+                if (value == m_Maskable) return;
+                m_Maskable = value;
+                UpdateRendererMaterial();
+            }
         }
 
         /// <summary>
@@ -255,6 +291,15 @@ 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 =>
@@ -307,15 +352,15 @@ namespace Coffee.UIExtensions
 
         public Vector3 parentScale { get; private set; }
 
-        public Vector3 canvasScale { get; private set; }
+        private Vector3 canvasScale { get; set; }
 
         protected override void OnEnable()
         {
             _isScaleStored = false;
             ResetGroupId();
             UIParticleUpdater.Register(this);
-            RegisterDirtyMaterialCallback(UpdateRendererMaterial);
 
+            //
             if (0 < particles.Count)
             {
                 RefreshParticles(particles);
@@ -325,7 +370,7 @@ namespace Coffee.UIExtensions
                 RefreshParticles();
             }
 
-            base.OnEnable();
+            UpdateRendererMaterial();
         }
 
         /// <summary>
@@ -341,10 +386,17 @@ namespace Coffee.UIExtensions
 
             _isScaleStored = false;
             UIParticleUpdater.Unregister(this);
+            _renderers.RemoveAll(r => r == null);
             _renderers.ForEach(r => r.Reset());
-            UnregisterDirtyMaterialCallback(UpdateRendererMaterial);
+            _canvas = null;
+        }
 
-            base.OnDisable();
+        /// <summary>
+        /// Called when the state of the parent Canvas is changed.
+        /// </summary>
+        protected override void OnCanvasHierarchyChanged()
+        {
+            _canvas = null;
         }
 
         /// <summary>
@@ -354,6 +406,14 @@ 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()
         {
         }
@@ -454,7 +514,7 @@ 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);
             }
         }
@@ -472,7 +532,7 @@ 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++)
@@ -501,7 +561,7 @@ namespace Coffee.UIExtensions
         /// </summary>
         public void SetParticleSystemPrefab(GameObject prefab)
         {
-            if (!prefab) return;
+            if (prefab == null) return;
 
             SetParticleSystemInstance(Instantiate(prefab.gameObject), true);
         }
@@ -521,12 +581,14 @@ namespace Coffee.UIExtensions
         /// </summary>
         private void RefreshParticles(GameObject root)
         {
-            if (!root) return;
+            if (root == null) return;
             root.GetComponentsInChildren(true, particles);
             for (var i = particles.Count - 1; 0 <= i; i--)
             {
                 var ps = particles[i];
-                if (!ps || ps.GetComponentInParent<UIParticle>(true) != this)
+                if (!ps
+                    || ps.gameObject.CompareTag("EditorOnly") // Ignore "EditorOnly" tagged ParticleSystems.
+                    || ps.GetComponentInParent<UIParticle>(true) != this) // Ignore ParticleSystems that are not under this UIParticle.
                 {
                     particles.RemoveAt(i);
                 }
@@ -574,13 +636,15 @@ namespace Coffee.UIExtensions
             for (var i = 0; i < particleSystems.Count; i++)
             {
                 var ps = particleSystems[i];
-                if (!ps) continue;
-                GetRenderer(j++).Set(this, ps, false);
+                if (ps == null) continue;
+
+                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);
                 }
             }
         }
@@ -623,7 +687,7 @@ 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;
@@ -633,7 +697,7 @@ 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);
             }
@@ -646,23 +710,12 @@ 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();
             }
@@ -675,7 +728,7 @@ namespace Coffee.UIExtensions
                 _renderers.Add(UIParticleRenderer.AddRenderer(this, index));
             }
 
-            if (!_renderers[index])
+            if (_renderers[index] == null)
             {
                 _renderers[index] = UIParticleRenderer.AddRenderer(this, index);
             }
@@ -685,13 +738,13 @@ 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;
@@ -710,7 +763,7 @@ namespace Coffee.UIExtensions
             }
 
             // Create baking camera.
-            if (!_bakeCamera)
+            if (_bakeCamera == null)
             {
                 var go = new GameObject("[generated] UIParticle BakingCamera");
                 go.SetActive(false);

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

@@ -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/UIParticleRenderer.cs

@@ -15,6 +15,7 @@ using UnityEngine.UI;
 
 namespace Coffee.UIExtensions
 {
+    [Icon("Packages/com.coffee.ui-particle/Editor/UIParticleIcon.png")]
     [ExecuteAlways]
     [RequireComponent(typeof(RectTransform))]
     [RequireComponent(typeof(CanvasRenderer))]
@@ -24,12 +25,12 @@ namespace Coffee.UIExtensions
         private static readonly CombineInstance[] s_CombineInstances = { new CombineInstance() };
         private static readonly List<Material> s_Materials = new List<Material>(2);
         private static MaterialPropertyBlock s_Mpb;
-        private static readonly List<Color32> s_Colors = new List<Color32>();
         private static readonly Vector3[] s_Corners = new Vector3[4];
         private bool _delay;
         private int _index;
         private bool _isPrevStored;
         private bool _isTrail;
+        private bool _meshCleared;
         private Bounds _lastBounds;
         private Material _materialForRendering;
         private Material _modifiedMaterial;
@@ -41,6 +42,7 @@ namespace Coffee.UIExtensions
         private Vector2Int _prevScreenSize;
         private bool _preWarm;
         private ParticleSystemRenderer _renderer;
+        private ParticleSystem _mainEmitter;
 
         public override Texture mainTexture => _isTrail ? null : _particleSystem.GetTextureForSprite();
 
@@ -54,7 +56,7 @@ namespace Coffee.UIExtensions
                 s_Corners[1] = transform.TransformPoint(_lastBounds.min.x, _lastBounds.max.y, 0);
                 s_Corners[2] = transform.TransformPoint(_lastBounds.max.x, _lastBounds.max.y, 0);
                 s_Corners[3] = transform.TransformPoint(_lastBounds.max.x, _lastBounds.min.y, 0);
-                if (canvas)
+                if (canvas != null)
                 {
                     var worldToLocalMatrix = canvas.rootCanvas.transform.worldToLocalMatrix;
                     for (var i = 0; i < 4; ++i)
@@ -94,7 +96,7 @@ namespace Coffee.UIExtensions
         {
             get
             {
-                if (!_materialForRendering)
+                if (_materialForRendering == null)
                 {
                     _materialForRendering = base.materialForRendering;
                 }
@@ -105,7 +107,7 @@ namespace Coffee.UIExtensions
 
         public void Reset(int index = -1)
         {
-            if (_renderer)
+            if (_renderer != null)
             {
                 _renderer.enabled = true;
             }
@@ -113,13 +115,14 @@ namespace Coffee.UIExtensions
             _parent = null;
             _particleSystem = null;
             _renderer = null;
+            _mainEmitter = null;
             if (0 <= index)
             {
                 _index = index;
             }
 
             //_emitter = null;
-            if (this && isActiveAndEnabled)
+            if (isActiveAndEnabled)
             {
                 material = null;
                 canvasRenderer.Clear();
@@ -138,7 +141,7 @@ namespace Coffee.UIExtensions
             base.OnEnable();
 
             hideFlags = UIParticleProjectSettings.globalHideFlags;
-            if (!s_CombineInstances[0].mesh)
+            if (s_CombineInstances[0].mesh == null)
             {
                 s_CombineInstances[0].mesh = new Mesh
                 {
@@ -189,7 +192,6 @@ namespace Coffee.UIExtensions
             if (!IsActive() || !_parent)
             {
                 MaterialRepository.Release(ref _modifiedMaterial);
-                _modifiedMaterial = null;
                 return baseMaterial;
             }
 
@@ -204,9 +206,9 @@ namespace Coffee.UIExtensions
             }
 
             var hash = new Hash128(
-                modifiedMaterial ? (uint)modifiedMaterial.GetInstanceID() : 0,
-                texture ? (uint)texture.GetInstanceID() : 0,
-                0 < _parent.m_AnimatableProperties.Length ? (uint)GetInstanceID() : 0,
+                modifiedMaterial ? (uint)modifiedMaterial.GetHashCode() : 0,
+                texture ? (uint)texture.GetHashCode() : 0,
+                0 < _parent.m_AnimatableProperties.Length ? (uint)GetHashCode() : 0,
 #if UNITY_EDITOR
                 (uint)EditorJsonUtility.ToJson(modifiedMaterial).GetHashCode()
 #else
@@ -215,16 +217,17 @@ namespace Coffee.UIExtensions
             );
             if (!MaterialRepository.Valid(hash, _modifiedMaterial))
             {
-                MaterialRepository.Get(hash, ref _modifiedMaterial, () => new Material(modifiedMaterial)
+                MaterialRepository.Get(hash, ref _modifiedMaterial, x => new Material(x.mat)
                 {
-                    hideFlags = HideFlags.HideAndDontSave
-                });
+                    hideFlags = HideFlags.HideAndDontSave,
+                    mainTexture = x.texture ? x.texture : x.mat.mainTexture
+                }, (mat: modifiedMaterial, texture));
             }
 
             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 +250,7 @@ namespace Coffee.UIExtensions
 
             ps.TryGetComponent(out _renderer);
             _renderer.enabled = false;
-
-            //_emitter = emitter;
             _isTrail = isTrail;
-
             _renderer.GetSharedMaterials(s_Materials);
             material = s_Materials[isTrail ? 1 : 0];
             s_Materials.Clear();
@@ -267,6 +267,7 @@ namespace Coffee.UIExtensions
             _prevScreenSize = new Vector2Int(Screen.width, Screen.height);
             _prevCanvasScale = canvas ? canvas.scaleFactor : 1f;
             _delay = true;
+            _mainEmitter = mainEmitter;
 
             canvasRenderer.SetTexture(null);
 
@@ -283,28 +284,47 @@ namespace Coffee.UIExtensions
                 || !transform.lossyScale.GetScaled(_parent.scale3DForCalc).IsVisible() // Scale is not visible.
                 || (!_particleSystem.IsAlive() && !_particleSystem.isPlaying) // No particle.
                 || (_isTrail && !_particleSystem.trails.enabled) // Trail, but it is not enabled.
-#if UNITY_2018_3_OR_NEWER
-                || canvasRenderer.GetInheritedAlpha() <
-                0.01f // #102: Do not bake particle system to mesh when the alpha is zero.
-#endif
             )
             {
+                // Skip clearing the mesh if it's already cleared.
+                if (_meshCleared) return;
+
                 Profiler.BeginSample("[UIParticleRenderer] Clear Mesh");
                 workerMesh.Clear();
                 canvasRenderer.SetMesh(workerMesh);
                 _lastBounds = new Bounds();
+                _meshCleared = true;
                 Profiler.EndSample();
 
                 return;
             }
 
+            // Reset custom data.
+            // var customData = _particleSystem.customData;
+            // if (!customData.enabled || customData.GetMode(ParticleSystemCustomData.Custom1) == ParticleSystemCustomDataMode.Disabled)
+            // {
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 0, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 1, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 2, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom1, 3, 0);
+            // }
+            //
+            // if (!customData.enabled || customData.GetMode(ParticleSystemCustomData.Custom2) == ParticleSystemCustomDataMode.Disabled)
+            // {
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 0, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 1, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 2, 0);
+            //     customData.SetVector(ParticleSystemCustomData.Custom2, 3, 0);
+            // }
+
+            _meshCleared = false;
             var main = _particleSystem.main;
             var scale = GetWorldScale();
             var psPos = _particleSystem.transform.position;
 
             // Simulate particles.
             Profiler.BeginSample("[UIParticle] Bake Mesh > Simulate Particles");
-            if (!_isTrail && _parent.canSimulate)
+            if (!_isTrail && _parent.canSimulate && !_mainEmitter)
             {
 #if UNITY_EDITOR
                 if (!Application.isPlaying)
@@ -315,6 +335,13 @@ namespace Coffee.UIExtensions
 #endif
                 {
                     ResolveResolutionChange(psPos, scale);
+
+                    // fix: second and subsequent bursts not displayed when world simulation and non-looping. (#326)
+                    if (!_particleSystem.IsLocalSpace() && !main.loop && _particleSystem.time == 0)
+                    {
+                        _delay = true;
+                    }
+
                     Simulate(scale, _parent.isPaused || _delay);
 
                     if (_delay && !_parent.isPaused)
@@ -422,7 +449,7 @@ namespace Coffee.UIExtensions
                     workerMesh.LinearToGamma();
                 }
 
-                var components = ListPool<Component>.Rent();
+                var components = InternalListPool<Component>.Rent();
                 GetComponents(typeof(IMeshModifier), components);
                 for (var i = 0; i < components.Count; i++)
                 {
@@ -431,7 +458,7 @@ namespace Coffee.UIExtensions
 #pragma warning restore CS0618 // Type or member is obsolete
                 }
 
-                ListPool<Component>.Return(ref components);
+                InternalListPool<Component>.Return(ref components);
             }
 
             Profiler.EndSample();
@@ -443,7 +470,7 @@ 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);
@@ -460,7 +487,7 @@ namespace Coffee.UIExtensions
                 r.canvasRenderer.SetMaterial(materialForRendering, 0);
             }
 
-            ListPool<UIParticleRenderer>.Return(ref renderers);
+            InternalListPool<UIParticleRenderer>.Return(ref renderers);
 
             if (_parent.canRender)
             {
@@ -543,6 +570,30 @@ namespace Coffee.UIExtensions
                     return Matrix4x4.Translate(psPos)
                            * Matrix4x4.Scale(scale);
                 case ParticleSystemSimulationSpace.World:
+                    if (_isTrail)
+                    {
+                        return Matrix4x4.Translate(psPos)
+                               * Matrix4x4.Scale(scale)
+                               * Matrix4x4.Translate(-psPos);
+                    }
+
+                    if (_mainEmitter)
+                    {
+                        if (_mainEmitter.IsLocalSpace())
+                        {
+                            return Matrix4x4.Translate(psPos)
+                                   * Matrix4x4.Scale(scale)
+                                   * Matrix4x4.Translate(-psPos);
+                        }
+                        else
+                        {
+                            psPos = _particleSystem.transform.position - _mainEmitter.transform.position;
+                            return Matrix4x4.Translate(psPos)
+                                   * Matrix4x4.Scale(scale)
+                                   * Matrix4x4.Translate(-psPos);
+                        }
+                    }
+
                     return Matrix4x4.Scale(scale);
                 case ParticleSystemSimulationSpace.Custom:
                     return Matrix4x4.Translate(_particleSystem.main.customSimulationSpace.position.GetScaled(scale))
@@ -605,6 +656,7 @@ namespace Coffee.UIExtensions
                 : main.useUnscaledTime
                     ? Time.unscaledDeltaTime
                     : Time.deltaTime;
+            deltaTime *= _parent.timeScaleMultiplier;
 
             // Pre-warm:
             if (0 < deltaTime && _preWarm)
@@ -685,7 +737,7 @@ 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/UIParticleRenderer.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/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];
             }
 
@@ -88,15 +84,15 @@ namespace Coffee.UIParticleInternal
                 var bRenderer = b.GetComponent<ParticleSystemRenderer>();
 
                 // Render queue: ascending
-                var aMat = aRenderer.sharedMaterial ? aRenderer.sharedMaterial : aRenderer.trailMaterial;
-                var bMat = bRenderer.sharedMaterial ? bRenderer.sharedMaterial : bRenderer.trailMaterial;
-                if (!aMat && !bMat) return 0;
-                if (!aMat) return -1;
-                if (!bMat) return 1;
+                var aMat = aRenderer.sharedMaterial != null ? aRenderer.sharedMaterial : aRenderer.trailMaterial;
+                var bMat = bRenderer.sharedMaterial != null ? bRenderer.sharedMaterial : bRenderer.trailMaterial;
+                if (aMat == null && bMat == null) return 0;
+                if (aMat == null) return -1;
+                if (bMat == null) return 1;
 
                 if (sortByMaterial)
                 {
-                    return aMat.GetInstanceID() - bMat.GetInstanceID();
+                    return aMat.GetHashCode() - bMat.GetHashCode();
                 }
 
                 if (aMat.renderQueue != bMat.renderQueue)
@@ -135,7 +131,7 @@ namespace Coffee.UIParticleInternal
         {
             for (var i = 0; i < list.Count; i++)
             {
-                if (list[i].GetInstanceID() == ps.GetInstanceID())
+                if (list[i].GetHashCode() == ps.GetHashCode())
                 {
                     return i;
                 }
@@ -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 FindObjectsByType<Animator>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-            foreach (var animator in FindObjectsOfType<Animator>())
-#endif
+            foreach (var animator in Misc.FindObjectsOfType<Animator>())
             {
                 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 FindObjectsByType<UIParticle>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-            foreach (var uip in FindObjectsOfType<UIParticle>())
-#endif
+            foreach (var uip in Misc.FindObjectsOfType<UIParticle>())
             {
                 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 FindObjectsByType<ParticleSystem>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-            foreach (var p in FindObjectsOfType<ParticleSystem>())
-#endif
+            foreach (var p in Misc.FindObjectsOfType<ParticleSystem>())
             {
                 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 FindObjectsByType<ParticleSystem>(FindObjectsInactive.Include, FindObjectsSortMode.None))
-#else
-            foreach (var ps in FindObjectsOfType<ParticleSystem>())
-#endif
+            foreach (var ps in Misc.FindObjectsOfType<ParticleSystem>())
             {
                 ps.transform.localScale = new Vector3(scale, scale, scale);
             }

Packages/src/package.json

@@ -2,8 +2,8 @@
   "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": "4.10.0",
-  "unity": "2018.2",
+  "version": "5.0.0-preview.17",
+  "unity": "2019.3",
   "license": "MIT",
   "repository": {
     "type": "git",

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"
+        ]
+    }
+}