chore(release): 5.0.0-preview.18 [skip ci]

# [5.0.0-preview.18](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/5.0.0-preview.17...5.0.0-preview.18) (2026-06-26)

### Bug Fixes

* `ParticleSystemPreviewer` is no longer included in build ([bad976c](bad976cf01))
* `UI/Additive` shader does not support RectMask2D softness. ([83145d3](83145d3a6e))
* add support for Unity 6.7 ([26fd3da](26fd3da20b)), closes [#408](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/408)
* rename `UIParticleProjectSettings.enableLinearToGamma` to `autoColorCorrection` ([10f82a8](10f82a8579))
* Support for skipping "reload domain" ([b7bb112](b7bb1124f6)), closes [#406](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/406)
* there is a compilation error in Unity 2019.2 or earlier ([c327632](c327632e1e)), closes [#407](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/407)

### Features

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

.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@v5
+
+      - name: 🚀 Deploy To GitHub Pages
+        uses: actions/deploy-pages@v5

.github/workflows/release.yml

@@ -5,8 +5,9 @@ on:
   workflow_dispatch:
   push:
     branches:
-      - release
+      - preview
-      - release-*
+      - main
+      - v*.x
     tags-ignore:
       - "**"
 
@@ -22,9 +23,6 @@ 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@v6
@@ -40,62 +38,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ github.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@v5
-        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@v5
-        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

Packages/src/.releaserc.json

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

Packages/src/CHANGELOG.md

@@ -1,3 +1,30 @@
+# [5.0.0-preview.18](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/5.0.0-preview.17...5.0.0-preview.18) (2026-06-26)
+
+
+### Bug Fixes
+
+* `ParticleSystemPreviewer` is no longer included in build ([bad976c](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/bad976cf01180bdabf5cd2f1760e069afdcb644a))
+* `UI/Additive` shader does not support RectMask2D softness. ([83145d3](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/83145d3a6ede3831d1f7c49afde6ef7d8a498d21))
+* add support for Unity 6.7 ([26fd3da](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/26fd3da20b6b07f7a26df662358c53757a7cc5f5)), closes [#408](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/408)
+* rename `UIParticleProjectSettings.enableLinearToGamma` to `autoColorCorrection` ([10f82a8](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/10f82a8579a2d055f897e7a8d6f3b5ba1fc43ae8))
+* Support for skipping "reload domain" ([b7bb112](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/b7bb1124f6921ebca1b48991462637767b95e504)), closes [#406](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/406)
+* there is a compilation error in Unity 2019.2 or earlier ([c327632](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/c327632e1eb203351ba1a1087a19eb7838c22530)), closes [#407](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/407)
+
+
+### Features
+
+* add fields located outside the `Properties` block in the shader as `Animatable Properties` ([ea2fcfd](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/ea2fcfd8099a24b92624d34600beb519fb9d2b38)), closes [#399](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/399)
+* preview the ParticleSystem playback when selecting a UIParticle in the Editor ([108bcfb](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/108bcfbd246960dc730546dc334424cf2e17bfd4))
+* project-wide default view size for baking ([8e0ff10](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/8e0ff10c7344d9f53d2f4f096ddeb7392b67f930)), closes [#360](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/360)
+
+## [4.13.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.13.0...v4.13.1) (2026-06-26)
+
+
+### Bug Fixes
+
+* `ParticleSystemPreviewer` is no longer included in build ([bad976c](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/bad976cf01180bdabf5cd2f1760e069afdcb644a))
+* add support for Unity 6.7 ([26fd3da](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/26fd3da20b6b07f7a26df662358c53757a7cc5f5)), closes [#408](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/408)
+
 # [4.13.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.12.2...v4.13.0) (2026-06-25)
 
 

Packages/src/Editor/UIParticleEditor.cs

@@ -3,7 +3,6 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.RegularExpressions;
 using UnityEditor;
-using UnityEditor.UI;
 using UnityEditorInternal;
 using UnityEngine;
 using UnityEngine.Profiling;
@@ -26,7 +25,7 @@ namespace Coffee.UIExtensions
 {
     [CustomEditor(typeof(UIParticle))]
     [CanEditMultipleObjects]
-    internal class UIParticleEditor : GraphicEditor
+    internal class UIParticleEditor : Editor
     {
         internal class State : ScriptableSingleton<State>
         {
@@ -89,10 +88,8 @@ 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");
@@ -488,9 +485,11 @@ namespace Coffee.UIExtensions
         {
             if (!p || (ignoreCurrent && target == p)) return;
 
-            var cr = p.canvasRenderer;
+            Misc.DestroyImmediate(p);
-            DestroyImmediate(p);
+            if (p.TryGetComponent<CanvasRenderer>(out var cr))
-            DestroyImmediate(cr);
+            {
+                Misc.DestroyImmediate(cr);
+            }
 
 #if UNITY_2018_3_OR_NEWER
             var stage = PrefabStageUtility.GetCurrentPrefabStage();

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 -->
 
@@ -27,6 +27,8 @@ You can render, mask, and sort your `ParticleSystems` for UI without the need fo
     - [Install via UPM (with Package Manager UI)](#install-via-upm-with-package-manager-ui)
     - [Install via UPM (Manually)](#install-via-upm-manually)
   - [Install as Embedded Package](#install-as-embedded-package)
+- [🔄 Upgrading from v3/v4 to v5](#-upgrading-from-v3v4-to-v5)
+  - [Breaking Changes](#breaking-changes)
 - [🚀 Usage](#-usage)
   - [Component: UIParticle](#component-uiparticle)
   - [Basic Usage](#basic-usage)
@@ -34,6 +36,7 @@ You can render, mask, and sort your `ParticleSystems` for UI without the need fo
   - [Usage with `Mask` or `RectMask2D` Component](#usage-with-mask-or-rectmask2d-component)
   - [Usage with Script](#usage-with-script)
   - [Component: UIParticleAttractor](#component-uiparticleattractor)
+  - [Component: ParticleSystemPreviewer](#component-particlesystempreviewer)
   - [Project Settings](#project-settings)
 - [🛠 Development Note](#-development-note)
   - [Compares the Baking mesh approach with the conventional approach](#compares-the-baking-mesh-approach-with-the-conventional-approach)
@@ -104,7 +107,7 @@ 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 +119,16 @@ _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 +136,41 @@ _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/releases) and extract it.
+1. Download the `Source code (zip)` file from [Releases](https://github.com/mob-sakai/ParticleEffectForUGUI/releases) and
-2. Place it in your project's `Packages` directory.  
+   extract it.
-   ![](https://github.com/mob-sakai/mob-sakai/assets/12690315/0b7484b4-5fca-43b0-a9ef-e5dbd99bcdb4)
+2. Move the `<extracted_dir>/Packages/src` directory into your project's `Packages` directory.  
-- If you want to fix bugs or add features, install it as an embedded package.
+   ![](https://github.com/user-attachments/assets/187cbcbe-5922-4ed5-acec-cf19aa17d208)
-- To update the package, you need to re-download it and replace the contents.
+    - 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>
 
@@ -271,16 +293,17 @@ uiParticle.Stop();
     - **Unscaled Time:** Update with unscaled delta time.
 - **OnAttracted**: An event called when attracting is complete (per particle).
 
-
 <br><br>
 
 ### Component: ParticleSystemPreviewer
 
-`ParticleSystemPreviewer` is used to preview a ParticleSystem in the editor.
+`ParticleSystemPreviewer` is used to preview a `ParticleSystem` in the editor.
+
+![](https://github.com/mob-sakai/mob-sakai/releases/download/docs/1782441157549.png)
 
 - When a `GameObject` with this component is selected in the editor, a temporary `ParticleSystem` is added if needed so you can preview the effect in the Scene view.
 - The generated `ParticleSystem` is marked with `HideFlags.DontSave`, so it is neither saved nor included in builds.
-
+- This component will be removed in builds.
 
 <br><br>
 

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

@@ -0,0 +1,153 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Coffee.UIParticleInternal
+{
+    internal static class MeshExtensions
+    {
+        internal static readonly InternalObjectPool<Mesh> s_MeshPool = new InternalObjectPool<Mesh>(
+            () =>
+            {
+                var mesh = new Mesh
+                {
+                    hideFlags = HideFlags.DontSave | HideFlags.NotEditable
+                };
+                mesh.MarkDynamic();
+                return mesh;
+            },
+            mesh => mesh,
+            mesh =>
+            {
+                if (mesh != null)
+                {
+                    mesh.Clear();
+                }
+            });
+
+        public static Mesh Rent()
+        {
+            return s_MeshPool.Rent();
+        }
+
+        public static void Return(ref Mesh mesh)
+        {
+            s_MeshPool.Return(ref mesh);
+        }
+
+        public static void CopyTo(this Mesh self, Mesh dst)
+        {
+            if (self == null || dst == null) return;
+
+            var vector3List = InternalListPool<Vector3>.Rent();
+            var vector4List = InternalListPool<Vector4>.Rent();
+            var color32List = InternalListPool<Color32>.Rent();
+            var intList = InternalListPool<int>.Rent();
+
+            dst.Clear(false);
+
+            self.GetVertices(vector3List);
+            dst.SetVertices(vector3List);
+
+            self.GetTriangles(intList, 0);
+            dst.SetTriangles(intList, 0);
+
+            self.GetNormals(vector3List);
+            dst.SetNormals(vector3List);
+
+            self.GetTangents(vector4List);
+            dst.SetTangents(vector4List);
+
+            self.GetColors(color32List);
+            dst.SetColors(color32List);
+
+            self.GetUVs(0, vector4List);
+            dst.SetUVs(0, vector4List);
+
+            self.GetUVs(1, vector4List);
+            dst.SetUVs(1, vector4List);
+
+            self.GetUVs(2, vector4List);
+            dst.SetUVs(2, vector4List);
+
+            self.GetUVs(3, vector4List);
+            dst.SetUVs(3, vector4List);
+
+            dst.RecalculateBounds();
+            InternalListPool<Vector3>.Return(ref vector3List);
+            InternalListPool<Vector4>.Return(ref vector4List);
+            InternalListPool<Color32>.Return(ref color32List);
+            InternalListPool<int>.Return(ref intList);
+        }
+
+        public static void CopyTo(this VertexHelper self, Mesh dst)
+        {
+            if (self == null || dst == null) return;
+
+            self.FillMesh(dst);
+        }
+
+        public static void CopyTo(this Mesh self, VertexHelper dst)
+        {
+            if (self == null || dst == null) return;
+
+            var vertexCount = self.vertexCount;
+            var indexCount = self.triangles.Length;
+            self.CopyTo(dst, vertexCount, indexCount);
+        }
+
+        public static void CopyTo(this Mesh self, VertexHelper dst, int vertexCount, int indexCount)
+        {
+            if (self == null || dst == null) return;
+
+            var positions = InternalListPool<Vector3>.Rent();
+            var normals = InternalListPool<Vector3>.Rent();
+            var uv0 = InternalListPool<Vector4>.Rent();
+            var uv1 = InternalListPool<Vector4>.Rent();
+            var uv2 = InternalListPool<Vector4>.Rent();
+            var uv3 = InternalListPool<Vector4>.Rent();
+            var tangents = InternalListPool<Vector4>.Rent();
+            var colors = InternalListPool<Color32>.Rent();
+            var indices = InternalListPool<int>.Rent();
+            self.GetVertices(positions);
+            self.GetColors(colors);
+            self.GetUVs(0, uv0);
+            self.GetUVs(1, uv1);
+            self.GetUVs(2, uv1);
+            self.GetUVs(3, uv1);
+            self.GetNormals(normals);
+            self.GetTangents(tangents);
+            self.GetIndices(indices, 0);
+
+            dst.Clear();
+            for (var i = 0; i < vertexCount; i++)
+            {
+                dst.AddVert(positions.GetOrDefault(i), colors.GetOrDefault(i), uv0.GetOrDefault(i), uv1.GetOrDefault(i),
+                    uv2.GetOrDefault(i), uv3.GetOrDefault(i), normals.GetOrDefault(i), tangents.GetOrDefault(i));
+            }
+
+            var count = Mathf.Clamp(indexCount, 0, indices.Count);
+            for (var i = 0; i < count - 2; i += 3)
+            {
+                dst.AddTriangle(indices[i], indices[i + 1], indices[i + 2]);
+            }
+
+            InternalListPool<Vector3>.Return(ref positions);
+            InternalListPool<Vector3>.Return(ref normals);
+            InternalListPool<Vector4>.Return(ref uv0);
+            InternalListPool<Vector4>.Return(ref uv1);
+            InternalListPool<Vector4>.Return(ref uv2);
+            InternalListPool<Vector4>.Return(ref uv3);
+            InternalListPool<Vector4>.Return(ref tangents);
+            InternalListPool<Color32>.Return(ref colors);
+            InternalListPool<int>.Return(ref indices);
+        }
+
+        private static T GetOrDefault<T>(this List<T> self, int index)
+        {
+            return 0 <= index && index < self.Count
+                ? self[index]
+                : default;
+        }
+    }
+}

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

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 8c949d47f5c6d4d22bd7baebc60d48f3
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/src/Runtime/ParticleSystemPreviewer.cs

@@ -1,3 +1,4 @@
+#if UNITY_EDITOR
 using System.Collections.Generic;
 using System.Linq;
 using Coffee.UIParticleInternal;
@@ -13,7 +14,6 @@ namespace Coffee.UIExtensions
         // Do nothing.
     }
 
-#if UNITY_EDITOR
     [CustomEditor(typeof(ParticleSystemPreviewer))]
     [CanEditMultipleObjects]
     internal class ParticleSystemPreviewerEditor : Editor
@@ -29,6 +29,7 @@ namespace Coffee.UIExtensions
         public override void OnInspectorGUI()
         {
             base.OnInspectorGUI();
+            EditorGUILayout.HelpBox("ParticleSystemPreviewer will be removed in build.", MessageType.Warning);
             ParticleSystemPreviewSystem.DrawWarningForTemporary(_gameObjects);
             ParticleSystemPreviewSystem.DrawWarningForPermanent(_gameObjects);
         }
@@ -43,6 +44,12 @@ namespace Coffee.UIExtensions
     {
         private const HideFlags k_TemporaryHideFlags = HideFlags.DontSave | HideFlags.NotEditable;
 
+        private const string k_TemporaryMesssage = "The temporary ParticleSystem for preview is attached.\n" +
+                                                   "It will be removed when exiting edit mode.";
+
+        private const string k_PermanentMesssage = "The permanent ParticleSystem is attached.\n" +
+                                                   "It will be included in build.";
+
         [SerializeField]
         private List<GameObject> m_PreviewObjects = new List<GameObject>();
 
@@ -192,8 +199,7 @@ namespace Coffee.UIExtensions
         {
             if (gameObjects == null || gameObjects.Length == 0 || !gameObjects.Any(HasTemporaryParticleSystem)) return;
 
-            if (WarningButton("The temporary ParticleSystem for preview is attached.\n" +
+            if (HelpBoxButton(MessageType.Warning, k_TemporaryMesssage, "Remove"))
-                              "It will be removed when exiting edit mode.", "Remove"))
             {
                 foreach (var go in gameObjects)
                 {
@@ -209,8 +215,7 @@ namespace Coffee.UIExtensions
         {
             if (gameObjects == null || gameObjects.Length == 0 || !gameObjects.Any(HasPermanentParticleSystem)) return;
 
-            if (WarningButton("The permanent ParticleSystem is attached.\n" +
+            if (HelpBoxButton(MessageType.Info, k_PermanentMesssage, "Remove"))
-                              "It will be included in build.", "Remove"))
             {
                 foreach (var go in gameObjects)
                 {
@@ -224,14 +229,14 @@ namespace Coffee.UIExtensions
             }
         }
 
-        private static bool WarningButton(string message, string buttonText)
+        private static bool HelpBoxButton(MessageType messageType, string message, string buttonText)
         {
             EditorGUILayout.BeginHorizontal();
-            EditorGUILayout.HelpBox(message, MessageType.Warning, true);
+            EditorGUILayout.HelpBox(message, messageType, true);
             var clicked = GUILayout.Button(EditorGUIUtility.TrTempContent(buttonText));
             EditorGUILayout.EndHorizontal();
             return clicked;
         }
     }
-#endif
 }
+#endif

Packages/src/Runtime/UIParticle.cs

@@ -3,9 +3,9 @@ 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")]
@@ -22,7 +22,7 @@ namespace Coffee.UIExtensions
     [ExecuteAlways]
     [RequireComponent(typeof(RectTransform))]
     [RequireComponent(typeof(CanvasRenderer))]
-    public class UIParticle : MaskableGraphic, ISerializationCallbackReceiver
+    public class UIParticle : UIBehaviour, ISerializationCallbackReceiver
     {
         public enum AutoScalingMode
         {
@@ -64,7 +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.")]
@@ -125,20 +125,48 @@ namespace Coffee.UIExtensions
         [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>
+        public RectTransform rectTransform => transform as RectTransform;
-        /// Should this graphic be considered a target for ray-casting?
+
-        /// </summary>
+        public Canvas canvas
-        public override bool raycastTarget
         {
-            get => false;
+            get
-            set { }
+            {
+                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>
@@ -331,15 +359,15 @@ 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);
@@ -349,7 +377,7 @@ namespace Coffee.UIExtensions
                 RefreshParticles();
             }
 
-            base.OnEnable();
+            UpdateRendererMaterial();
         }
 
         /// <summary>
@@ -367,9 +395,15 @@ namespace Coffee.UIExtensions
             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>
@@ -379,6 +413,14 @@ 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()
         {
         }
@@ -678,17 +720,6 @@ 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++)

Packages/src/Runtime/UIParticleRenderer.cs

@@ -26,6 +26,7 @@ namespace Coffee.UIExtensions
         private static readonly List<Material> s_Materials = new List<Material>(2);
         private static MaterialPropertyBlock s_Mpb;
         private static readonly Vector3[] s_Corners = new Vector3[4];
+        private static readonly VertexHelper s_VertexHelper = new VertexHelper();
         private bool _delay;
         private int _index;
         private bool _isPrevStored;
@@ -451,11 +452,15 @@ namespace Coffee.UIExtensions
 
                 var components = InternalListPool<Component>.Rent();
                 GetComponents(typeof(IMeshModifier), components);
+                if (0 < components.Count)
+                {
+                    workerMesh.CopyTo(s_VertexHelper);
                     for (var i = 0; i < components.Count; i++)
                     {
-#pragma warning disable CS0618 // Type or member is obsolete
+                        ((IMeshModifier)components[i]).ModifyMesh(s_VertexHelper);
-                    ((IMeshModifier)components[i]).ModifyMesh(workerMesh);
+                    }
-#pragma warning restore CS0618 // Type or member is obsolete
+
+                    s_VertexHelper.FillMesh(workerMesh);
                 }
 
                 InternalListPool<Component>.Return(ref components);

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": "4.13.0",
+  "version": "5.0.0-preview.18",
-  "unity": "2018.2",
+  "unity": "2019.3",
   "license": "MIT",
   "repository": {
     "type": "git",