refactor

Editor/AnimatablePropertyEditor.cs

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

Editor/UIParticleEditor.cs

@@ -4,6 +4,7 @@ using System.Text.RegularExpressions;
 using UnityEditor;
 using UnityEditorInternal;
 using UnityEngine;
+using UnityEngine.Profiling;
 using UnityEngine.UI;
 
 #if UNITY_2021_2_OR_NEWER
@@ -44,6 +45,8 @@ namespace Coffee.UIExtensions
         private static readonly GUIContent s_ContentRandom = new GUIContent("Random");
         private static readonly GUIContent s_ContentScale = new GUIContent("Scale");
         private static readonly GUIContent s_ContentPrimary = new GUIContent("Primary");
+        private static readonly 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;
@@ -169,6 +172,7 @@ namespace Coffee.UIExtensions
             var current = target as UIParticle;
             if (!current) return;
 
+            Profiler.BeginSample("(UIP:E) OnInspectorGUI");
             serializedObject.Update();
 
             // Maskable
@@ -180,13 +184,8 @@ namespace Coffee.UIExtensions
             EditorGUI.EndDisabledGroup();
 
             // AnimatableProperties
-            var mats = current.particles
+            current.GetMaterials(s_TempMaterials);
-                .Where(x => x)
+            AnimatablePropertyEditor.Draw(_animatableProperties, s_TempMaterials);
-                .Select(x => x.GetComponent<ParticleSystemRenderer>().sharedMaterial)
-                .Where(x => x)
-                .ToArray();
-
-            AnimatablePropertyEditor.Draw(_animatableProperties, mats);
 
             // Mesh sharing
             EditorGUI.BeginChangeCheck();
@@ -194,9 +193,12 @@ namespace Coffee.UIExtensions
             if (EditorGUI.EndChangeCheck())
             {
                 serializedObject.ApplyModifiedProperties();
-                foreach (var uip in targets.OfType<UIParticle>())
+                foreach (var t in targets)
                 {
-                    uip.ResetGroupId();
+                    if (t is UIParticle uip)
+                    {
+                        uip.ResetGroupId();
+                    }
                 }
             }
 
@@ -204,7 +206,7 @@ namespace Coffee.UIExtensions
             EditorGUILayout.PropertyField(_positionMode);
 
             // Auto Scaling
-            DrawAutoScaling(_autoScalingMode, targets.OfType<UIParticle>());
+            EditorGUILayout.PropertyField(_autoScalingMode);
 
             // Custom View Size
             EditorGUILayout.PropertyField(_useCustomView);
@@ -221,9 +223,7 @@ namespace Coffee.UIExtensions
 
             // Target ParticleSystems.
             EditorGUI.BeginChangeCheck();
-            EditorGUI.BeginDisabledGroup(targets.OfType<UIParticle>().Any(x => !x.canvas));
             _ro.DoLayoutList();
-            EditorGUI.EndDisabledGroup();
             serializedObject.ApplyModifiedProperties();
 
             if (EditorGUI.EndChangeCheck())
@@ -236,7 +236,8 @@ namespace Coffee.UIExtensions
             }
 
             // Non-UI built-in shader is not supported.
-            foreach (var mat in current.materials)
+            Profiler.BeginSample("(UIP:E) Non-UI built-in shader is not supported.");
+            foreach (var mat in s_TempMaterials)
             {
                 if (!mat || !mat.shader) continue;
                 var shader = mat.shader;
@@ -249,15 +250,18 @@ namespace Coffee.UIExtensions
                 }
             }
 
+            Profiler.EndSample();
+
             // Does the shader support UI masks?
+            Profiler.BeginSample("(UIP:E) Does the shader support UI masks?");
             if (current.maskable && current.GetComponentInParent<Mask>(false))
             {
-                foreach (var mat in current.materials)
+                foreach (var mat in s_TempMaterials)
                 {
                     if (!mat || !mat.shader) continue;
                     var shader = mat.shader;
-                    if (s_Shaders.Contains(shader)) continue;
+                    if (!s_Shaders.Add(shader)) continue;
-                    s_Shaders.Add(shader);
+
                     foreach (var propName in s_MaskablePropertyNames)
                     {
                         if (mat.HasProperty(propName)) continue;
@@ -271,7 +275,9 @@ namespace Coffee.UIExtensions
                 }
             }
 
+            s_TempMaterials.Clear();
             s_Shaders.Clear();
+            Profiler.EndSample();
 
             // UIParticle for trail should be removed.
             var label = "This UIParticle component should be removed. The UIParticle for trails is no longer needed.";
@@ -310,12 +316,15 @@ namespace Coffee.UIExtensions
                 }
             }
 #endif
+            Profiler.EndSample();
+            EditorApplication.delayCall += () => Profiler.enabled = false;
         }
 
         private static bool IsBuiltInObject(Object obj)
         {
-            return AssetDatabase.TryGetGUIDAndLocalFileIdentifier(obj, out var guid, out long _)
+            return AssetDatabase.IsMainAsset(obj)
-                   && Regex.IsMatch(guid, "^0{16}.0{15}$", RegexOptions.Compiled);
+                   && AssetDatabase.TryGetGUIDAndLocalFileIdentifier(obj, out var guid, out long _)
+                   && s_RegexBuiltInGuid.IsMatch(guid);
         }
 
 #if UNITY_2018 || UNITY_2019
@@ -419,7 +428,7 @@ namespace Coffee.UIExtensions
             return showMax;
         }
 
-        private static void DrawAutoScaling(SerializedProperty prop, IEnumerable<UIParticle> uiParticles)
+        private static void DrawAutoScaling(SerializedProperty prop)
         {
             EditorGUILayout.PropertyField(prop);
         }

README.md

@@ -17,45 +17,36 @@ The particle rendering is maskable and sortable, without the need for an extra C
 
 ## 📝 Description
 
-![](https://user-images.githubusercontent.com/12690315/41771577-8da4b968-7650-11e8-9524-cd162c422d9d.gif)
+![Demo](https://user-images.githubusercontent.com/12690315/41771577-8da4b968-7650-11e8-9524-cd162c422d9d.gif)
 
-This package utilizes the new APIs `MeshBake/MashTrailBake` (introduced with Unity 2018.2) to render particles through
+This package uses the new APIs `MeshBake/MeshTrailBake` (introduced in Unity 2018.2) to render particles through CanvasRenderer.  
-CanvasRenderer.  
+You can render, mask, and sort your ParticleSystems for UI without the need for an additional Camera, RenderTexture, or Canvas.
-You can render, mask, and sort your ParticleSystems for UI without the necessity of an additional Camera, RenderTexture,
-or Canvas.
 
-### Features
+### Key Features
 
-* Easy to use: The package is ready to use out of the box.
+* **Easy to use:** The package is ready to use out of the box.
-* Sort particle effects and other UI by sibling index.
+* **Sortable:** Sort particle effects and other UI elements by sibling index.
-* No extra Camera, RenderTexture, or Canvas required.
+* **Maskable:** Supports `Mask` or `RectMask2D`.
-* Masking options for Mask or RectMask2D.
+* **No extra components required:** No need for an additional `Camera`, `RenderTexture`, or `Canvas`.
-* Support for the Trail module.
+* **Trail module support:** Fully supports the Trail module.
-* Support for CanvasGroup alpha.
+* **CanvasGroup alpha support:** Integrates with `CanvasGroup` alpha.
-* No allocations needed to render particles.
+* **No allocations:** Efficiently renders particles without allocations.
-* Compatibility with overlay, camera space, and world space.
+* **Any canvas render mode support:** Works with overlay, camera space, and world space.
-* Support for Universal Render Pipeline (URP) and High Definition Render Pipeline (HDRP).
+* **Any Render pipeline support:** Compatible with Universal Render Pipeline (URP) and High Definition Render Pipeline (HDRP).
-* Support for disabling `Enter Play Mode Options > Reload Domain`.
+* **Disabling domain reload support:** Supports disabling `Enter Play Mode Options > Reload Domain`.
-* Support for changing material property with AnimationClip (AnimatableProperty).  
+* **Animatable material properties:** Supports changing material properties with AnimationClip (AnimatableProperty).  
-  ![AnimatableProperty.gif][AnimatableProperty.gif]
+  ![AnimatableProperty.gif](https://user-images.githubusercontent.com/12690315/53286323-2d94a980-37b0-11e9-8afb-c4a207805ff2.gif)
-* [4.0.0+] Support for 8+ materials.
+* **Multiple materials:** Supports 8+ materials.
-* [4.0.0+] Correct world space particle position adjustment when changing window size for standalone platforms (Windows,
+* **Correct positioning:** Adjusts world space particle positions correctly when changing window size for standalone platforms (Windows, MacOSX, and Linux).
-  MacOSX, and Linux).
+* **Adaptive scaling:** Provides adaptive scaling for UI (AutoScalingMode).
-* [4.0.0+] Adaptive scaling for UI.
+* **Performance optimization:** Mesh sharing group to improve performance.  
-* [4.0.0+] Mesh sharing group to improve performance.  
+  <img alt="MeshSharing.gif" src="https://user-images.githubusercontent.com/12690315/174311048-c882df81-6c34-4eba-b0aa-5645457692f1.gif" width="450"/>
-  ![MeshSharing.gif][MeshSharing.gif]
+* **Particle attractor:** Includes a particle attractor component.  
-* [4.0.0+] Particle attractor component.  
+  <img alt="ParticleAttractor.gif" src="https://user-images.githubusercontent.com/12690315/174311027-462929a4-13f0-4ec4-86ea-9c832f2eecf1.gif" width="450"/>
-  ![ParticleAttractor.gif][ParticleAttractor.gif]
+* **Emission position mode:** Supports relative/absolute particle emission position modes.  
-* [4.1.0+] Relative/Absolute particle position mode.  
+  <img alt="AbsolutePosition.gif" src="https://user-images.githubusercontent.com/12690315/175751579-5a2357e8-2ecf-4afd-83c8-66e9771bde39.gif" width="450"/>
-  ![AbsolutePosition.gif][AbsolutePosition.gif]
+* **Custom view size:** Fixes min/max particle size mismatch.  
-
+  ![CustomViewSize.gif](https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/dd929959-1a37-420b-b13d-e849022b9c9d)
-[AnimatableProperty.gif]: https://user-images.githubusercontent.com/12690315/53286323-2d94a980-37b0-11e9-8afb-c4a207805ff2.gif
-
-[MeshSharing.gif]: https://user-images.githubusercontent.com/12690315/174311048-c882df81-6c34-4eba-b0aa-5645457692f1.gif
-
-[ParticleAttractor.gif]: https://user-images.githubusercontent.com/12690315/174311027-462929a4-13f0-4ec4-86ea-9c832f2eecf1.gif
-
-[AbsolutePosition.gif]: https://user-images.githubusercontent.com/12690315/175751579-5a2357e8-2ecf-4afd-83c8-66e9771bde39.gif
 
 <br><br>
 
@@ -76,44 +67,55 @@ or Canvas.
 
 [JMO]: https://assetstore.unity.com/publishers/1669
 
-
 <br><br>
 
 ## ⚙ Installation
 
-_This package requires Unity 2018.3 or later._
+_This package requires **Unity 2018.3 or later**._
 
 #### Install via OpenUPM
 
-This package is available on [OpenUPM](https://openupm.com) package registry.
+- This package is available on [OpenUPM](https://openupm.com) package registry.
-This is the preferred method of installation, as you can easily receive updates as they're released.
+- This is the preferred method of installation, as you can easily receive updates as they're released.
+- If you have [openupm-cli](https://github.com/openupm/openupm-cli) installed, then run the following command in your project's directory:
+  ```
+  openupm add com.coffee.ui-particle
+  ```
+- To update the package, use Package Manager UI (`Window > Package Manager`) or run the following command with `@{version}`:
+  ```
+  openupm add com.coffee.ui-particle@4.8.0
+  ```
 
-If you have [openupm-cli](https://github.com/openupm/openupm-cli) installed, then run the following command in your
+#### Install via UPM (with Package Manager UI)
-project's directory:
 
-```sh
+- Click `Window > Package Manager` to open Package Manager UI.
-openupm add com.coffee.ui-particle
+- Click `+ > Add package from git URL...` and input the repository URL: `https://github.com/mob-sakai/ParticleEffectForUGUI.git`  
-```
+  ![](https://gist.github.com/assets/12690315/24af63ed-8a2e-483d-9023-7aa53d913330)
+- To update the package, change suffix `#{version}` to the target version.
+  - e.g. `https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.8.0`
 
-#### Install via UPM (using Git URL)
+#### Install via UPM (Manually)
 
-Navigate to your project's Packages folder and open the `manifest.json` file. Then add this package somewhere in
+- Open the `Packages/manifest.json` file in your project. Then add this package somewhere in the `dependencies` block:
-the `dependencies` block:
+  ```json
-
+  {
-```json
+    "dependencies": {
-{
+      "com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git",
-  "dependencies": {
+      ...
-    "com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git",
+    }
-    ...
   }
-}
+  ```
-```
 
-To update the package, change suffix `#{version}` to the target version.
+- To update the package, change suffix `#{version}` to the target version.
+  - e.g. `"com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.8.0",`
 
-* e.g. `"com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.6.0",`
+#### Install as Embedded Package
 
-Or, use [UpmGitExtension](https://github.com/mob-sakai/UpmGitExtension) to install and update the 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.
 
 <br><br>
 
@@ -133,19 +135,28 @@ Or, use [UpmGitExtension](https://github.com/mob-sakai/UpmGitExtension) to insta
 
 `UIParticle` controls the ParticleSystems that are attached to its own game objects and child game objects.
 
-![](https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/3559df45-63e7-4c4c-9233-f455779efa29)
+![](https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/1cf5753b-33fc-4cef-91c3-413c515a954f)
 
-- **Maskable**: Does this graphic allow masking.
+- **Maskable**: Does this graphic allow maskable.
-- **Scale**: Scale the rendering. When the `3D` toggle is enabled, 3D scale (x, y, z) is supported.
+- **Scale**: Scale the rendering particles. When the `3D` toggle is enabled, 3D scale (x, y, z) is supported.
 - **Animatable Properties**: If you want to update material properties (e.g., `_MainTex_ST`, `_Color`) in AnimationClip,
-  use this to mark the changes.
+  use this to mark as animatable.
 - **Mesh Sharing**: Particle simulation results are shared within the same group. A large number of the same effects can
   be displayed with a small load. When the `Random` toggle is enabled, it will be grouped randomly.
+  - **None:** Disable mesh sharing.
+  - **Auto:** Automatically select Primary/Replica.
+  - **Primary:** Provides particle simulation results to the same group.
+  - **Primary Simulator:** Primary, but do not render the particle (simulation only).
+  - **Replica:** Render simulation results provided by the primary.
 - **Position Mode**: Emission position mode.
-    - **Absolute:** Emit from the world position of the `ParticleSystem`.
+  - **Absolute:** The particles will be emitted from the world position.
-    - **Relative:** Emit from the scaled position of the `ParticleSystem`.
+  - **Relative:** The particles will be emitted from the scaled position.
-- **Auto Scaling**: `Transform.lossyScale` (=world scale) will be set to `(1, 1, 1)` on update. It prevents the
+- **Auto Scaling Mode**: How to automatically adjust when the Canvas scale is changed by the screen size or reference resolution.
-  root-Canvas scale from affecting the hierarchy-scaled `ParticleSystem`.
+  - **None:** Do nothing.
+  - **Transform:** Transform.lossyScale (=world scale) will be set to (1, 1, 1).
+  - **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.
 - **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
@@ -206,7 +217,7 @@ uiParticle.Stop();
 
 `UIParticleAttractor` attracts particles generated by the specified ParticleSystem.
 
-![](https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/ea6ae0ed-f9a8-437c-8baa-47526303391e)  
+![](https://github.com/mob-sakai/ParticleEffectForUGUI/assets/12690315/5c20ad73-4b9a-4f38-9cdc-119df5cce077)
 ![](https://user-images.githubusercontent.com/12690315/174311027-462929a4-13f0-4ec4-86ea-9c832f2eecf1.gif)
 
 - **Particle System**: Attracts particles generated by the specified particle system.

Runtime/UIParticle.cs

@@ -58,12 +58,12 @@ namespace Coffee.UIExtensions
         [Obsolete]
         internal bool m_AbsoluteMode;
 
-        [Tooltip("Particle effect scale")]
+        [Tooltip("Scale the rendering particles. When the `3D` toggle is enabled, 3D scale (x, y, z) is supported.")]
         [SerializeField]
         private Vector3 m_Scale3D = new Vector3(1, 1, 1);
 
-        [Tooltip("Animatable material properties.\n" +
+        [Tooltip("If you want to update material properties (e.g. _MainTex_ST, _Color) in AnimationClip, " +
-                 "If you want to change the material properties of the ParticleSystem in Animation, enable it.")]
+                 "use this to mark as animatable.")]
         [SerializeField]
         internal AnimatableProperty[] m_AnimatableProperties = new AnimatableProperty[0];
 
@@ -71,12 +71,13 @@ namespace Coffee.UIExtensions
         [SerializeField]
         private List<ParticleSystem> m_Particles = new List<ParticleSystem>();
 
-        [Tooltip("Mesh sharing.\n" +
+        [Tooltip("Particle simulation results are shared within the same group. " +
-                 "None: disable mesh sharing.\n" +
+                 "A large number of the same effects can be displayed with a small load.\n" +
-                 "Auto: automatically select Primary/Replica.\n" +
+                 "None: Disable mesh sharing.\n" +
-                 "Primary: provides particle simulation results to the same group.\n" +
+                 "Auto: Automatically select Primary/Replica.\n" +
+                 "Primary: Provides particle simulation results to the same group.\n" +
                  "Primary Simulator: Primary, but do not render the particle (simulation only).\n" +
-                 "Replica: render simulation results provided by the primary.")]
+                 "Replica: Render simulation results provided by the primary.")]
         [SerializeField]
         private MeshSharing m_MeshSharing = MeshSharing.None;
 
@@ -88,19 +89,22 @@ namespace Coffee.UIExtensions
         [SerializeField]
         private int m_GroupMaxId;
 
-        [Tooltip("Relative: The particles will be emitted from the scaled position of ParticleSystem.\n" +
+        [Tooltip("Emission position mode.\n" +
-                 "Absolute: The particles will be emitted from the world position of ParticleSystem.")]
+                 "Relative: The particles will be emitted from the scaled position.\n" +
+                 "Absolute: The particles will be emitted from the world position.")]
         [SerializeField]
         private PositionMode m_PositionMode = PositionMode.Relative;
 
         [SerializeField]
-        [Tooltip("Prevent the root-Canvas scale from affecting the hierarchy-scaled ParticleSystem.")]
         [Obsolete]
         internal bool m_AutoScaling;
 
         [SerializeField]
-        [Tooltip("Transform: Transform.lossyScale (=world scale) will be set to (1, 1, 1)." +
+        [Tooltip(
-                 "UIParticle: UIParticle.scale will be adjusted.")]
+            "How to automatically adjust when the Canvas scale is changed by the screen size or reference resolution.\n" +
+            "None: Do nothing.\n" +
+            "Transform: Transform.lossyScale (=world scale) will be set to (1, 1, 1).\n" +
+            "UIParticle: UIParticle.scale will be adjusted.")]
         private AutoScalingMode m_AutoScalingMode = AutoScalingMode.Transform;
 
         [SerializeField]
@@ -117,12 +121,12 @@ namespace Coffee.UIExtensions
         private bool m_Maskable = true;
 
         private readonly List<UIParticleRenderer> _renderers = new List<UIParticleRenderer>();
+        private Camera _bakeCamera;
         private Canvas _canvas;
         private int _groupId;
-        private Camera _bakeCamera;
-        private DrivenRectTransformTracker _tracker;
-        private Vector3 _storedScale;
         private bool _isScaleStored;
+        private Vector3 _storedScale;
+        private DrivenRectTransformTracker _tracker;
 
         public RectTransform rectTransform => transform as RectTransform;
 
@@ -158,7 +162,8 @@ namespace Coffee.UIExtensions
         }
 
         /// <summary>
-        /// Mesh sharing.
+        /// Particle simulation results are shared within the same group.
+        /// A large number of the same effects can be displayed with a small load.
         /// None: disable mesh sharing.
         /// Auto: automatically select Primary/Replica.
         /// Primary: provides particle simulation results to the same group.
@@ -201,9 +206,9 @@ namespace Coffee.UIExtensions
         }
 
         /// <summary>
-        /// Particle position mode.
+        /// Emission position mode.
-        /// Relative: The particles will be emitted from the scaled position of the ParticleSystem.
+        /// Relative: The particles will be emitted from the scaled position.
-        /// Absolute: The particles will be emitted from the world position of the ParticleSystem.
+        /// Absolute: The particles will be emitted from the world position.
         /// </summary>
         public PositionMode positionMode
         {
@@ -216,6 +221,7 @@ namespace Coffee.UIExtensions
         /// Relative: The particles will be emitted from the scaled position of the ParticleSystem.
         /// Absolute: The particles will be emitted from the world position of the ParticleSystem.
         /// </summary>
+        [Obsolete("The absoluteMode is now obsolete. Please use the autoScalingMode instead.", false)]
         public bool absoluteMode
         {
             get => m_PositionMode == PositionMode.Absolute;
@@ -233,8 +239,12 @@ namespace Coffee.UIExtensions
         }
 
         /// <summary>
-        /// Auto scaling mode.
+        /// How to automatically adjust when the Canvas scale is changed by the screen size or reference resolution.
+        /// <para/>
+        /// None: Do nothing.
+        /// <para/>
         /// Transform: Transform.lossyScale (=world scale) will be set to (1, 1, 1).
+        /// <para/>
         /// UIParticle: UIParticle.scale will be adjusted.
         /// </summary>
         public AutoScalingMode autoScalingMode
@@ -318,22 +328,6 @@ namespace Coffee.UIExtensions
 
         public List<ParticleSystem> particles => m_Particles;
 
-        /// <summary>
-        /// Get all base materials to render.
-        /// </summary>
-        public IEnumerable<Material> materials
-        {
-            get
-            {
-                for (var i = 0; i < _renderers.Count; i++)
-                {
-                    var r = _renderers[i];
-                    if (!r || !r.material) continue;
-                    yield return r.material;
-                }
-            }
-        }
-
         /// <summary>
         /// Paused.
         /// </summary>
@@ -492,6 +486,21 @@ namespace Coffee.UIExtensions
             isPaused = true;
         }
 
+        /// <summary>
+        /// Get all base materials to render.
+        /// </summary>
+        public void GetMaterials(List<Material> result)
+        {
+            if (result == null) return;
+
+            for (var i = 0; i < _renderers.Count; i++)
+            {
+                var r = _renderers[i];
+                if (!r || !r.material) continue;
+                result.Add(r.material);
+            }
+        }
+
         /// <summary>
         /// Refresh UIParticle using the ParticleSystem instance.
         /// </summary>

Runtime/UIParticleRenderer.cs

@@ -29,6 +29,7 @@ namespace Coffee.UIExtensions
         private static readonly Vector3[] s_Corners = new Vector3[4];
         private bool _delay;
         private int _index;
+        private bool _isPrevStored;
         private bool _isTrail;
         private Bounds _lastBounds;
         private Material _materialForRendering;
@@ -38,7 +39,6 @@ namespace Coffee.UIExtensions
         private float _prevCanvasScale;
         private Vector3 _prevPsPos;
         private Vector3 _prevScale;
-        private bool _isPrevStored;
         private Vector2Int _prevScreenSize;
         private bool _preWarm;
         private ParticleSystemRenderer _renderer;