3.0.0-preview.36

# [3.0.0-preview.36](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v3.0.0-preview.35...v3.0.0-preview.36) (2020-09-28)

### Bug Fixes

* do not bake particle system to mesh when the alpha is zero ([1775713](1775713c2d)), closes [#102](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/102)
* in Unity 2018.x, sample import failed on Windows ([f5861b0](f5861b0add))

CHANGELOG.md

@@ -1,3 +1,11 @@
+# [3.0.0-preview.36](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v3.0.0-preview.35...v3.0.0-preview.36) (2020-09-28)
+
+
+### Bug Fixes
+
+* do not bake particle system to mesh when the alpha is zero ([1775713](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/1775713c2dbeef09ad3eb1f49b53cf44bf61d535)), closes [#102](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/102)
+* in Unity 2018.x, sample import failed on Windows ([f5861b0](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/f5861b0add1477987d6b9a3db26979fde50930ad))
+
 # [3.0.0-preview.35](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v3.0.0-preview.34...v3.0.0-preview.35) (2020-09-27)
 
 

Scripts/AnimatableProperty.cs

@@ -1,5 +1,4 @@
-using System;
-using UnityEngine;
+using UnityEngine;
 
 namespace Coffee.UIExtensions
 {

Scripts/BakingCamera.cs

@@ -1,6 +1,6 @@
 using UnityEngine;
 
-namespace Coffee.UIExtensions
+namespace Coffee.UIParticleExtensions
 {
     internal class BakingCamera : MonoBehaviour
     {

Scripts/CombineInstanceEx.cs

@@ -1,8 +1,7 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using UnityEngine;
 
-namespace Coffee.UIExtensions
+namespace Coffee.UIParticleExtensions
 {
     internal class CombineInstanceEx
     {

Scripts/Editor/AnimatedPropertiesEditor.cs

@@ -1,4 +1,3 @@
-using System;
 using UnityEditor;
 using UnityEngine;
 using System.Collections.Generic;

Scripts/Editor/ImportSampleMenu.cs

@@ -0,0 +1,70 @@
+#if !UNITY_2019_1_OR_NEWER
+using System.IO;
+using System.Linq;
+using System.Text.RegularExpressions;
+using UnityEditor;
+
+static class ImportSampleMenu_UIParticle
+{
+    private const string k_DisplayName = "UI Particle";
+    private const string k_JsonGuid = "823dc693d087a4b559c7e1547274cc7d";
+
+    [MenuItem("Assets/Samples/" + k_DisplayName + "/Import Demo")]
+    private static void ImportDemo()
+    {
+        ImportSample(k_JsonGuid, "Demo");
+    }
+
+    private static void ImportSample(string jsonGuid, string sampleName)
+    {
+        var jsonPath = AssetDatabase.GUIDToAssetPath(jsonGuid);
+        var packageRoot = Path.GetDirectoryName(jsonPath).Replace('\\', '/');
+        var json = File.ReadAllText(jsonPath);
+        var version = Regex.Match(json, "\"version\"\\s*:\\s*\"([^\"]+)\"").Groups[1].Value;
+        var src = string.Format("{0}/Samples~/{1}", packageRoot, sampleName);
+        var dst = string.Format("Assets/Samples/{0}/{1}/{2}", k_DisplayName, version, sampleName);
+        var previousPath = GetPreviousSamplePath(k_DisplayName, sampleName);
+
+        // Remove the previous sample directory.
+        if (!string.IsNullOrEmpty(previousPath))
+        {
+            var msg = "A different version of the sample is already imported at\n\n"
+                      + previousPath
+                      + "\n\nIt will be deleted when you update. Are you sure you want to continue?";
+            if (!EditorUtility.DisplayDialog("Sample Importer", msg, "OK", "Cancel"))
+                return;
+
+            FileUtil.DeleteFileOrDirectory(previousPath);
+
+            var metaFile = previousPath + ".meta";
+            if (File.Exists(metaFile))
+                FileUtil.DeleteFileOrDirectory(metaFile);
+        }
+
+        if (!Directory.Exists(dst))
+            FileUtil.DeleteFileOrDirectory(dst);
+
+        var dstDir = Path.GetDirectoryName(dst);
+        if (!Directory.Exists(dstDir))
+            Directory.CreateDirectory(dstDir);
+
+        if (Directory.Exists(src))
+            FileUtil.CopyFileOrDirectory(src, dst);
+        else
+            throw new DirectoryNotFoundException(src);
+
+        AssetDatabase.Refresh(ImportAssetOptions.ImportRecursive);
+    }
+
+    private static string GetPreviousSamplePath(string displayName, string sampleName)
+    {
+        var sampleRoot = string.Format("Assets/Samples/{0}", displayName);
+        var sampleRootInfo = new DirectoryInfo(sampleRoot);
+        if (!sampleRootInfo.Exists) return null;
+
+        return sampleRootInfo.GetDirectories()
+            .Select(versionDir => Path.Combine(versionDir.ToString(), sampleName))
+            .FirstOrDefault(Directory.Exists);
+    }
+}
+#endif

Scripts/Editor/UIParticleMenu.cs

@@ -1,113 +0,0 @@
-using System.IO;
-using System.Text.RegularExpressions;
-using UnityEditor;
-using UnityEngine;
-using UnityEngine.UI;
-
-namespace Coffee.UIExtensions
-{
-    public class UIParticleMenu
-    {
-#if !UNITY_2019_1_OR_NEWER
-        static string GetPreviousSamplePath(string displayName, string sampleName)
-        {
-            string sampleRoot = string.Format("Assets/Samples/{0}", displayName);
-            var sampleRootInfo = new DirectoryInfo(sampleRoot);
-            if (!sampleRootInfo.Exists) return null;
-
-            foreach (var versionDir in sampleRootInfo.GetDirectories())
-            {
-                var samplePath = Path.Combine(versionDir.ToString(), sampleName);
-                if (Directory.Exists(samplePath))
-                    return samplePath;
-            }
-
-            return null;
-        }
-
-
-        static void ImportSample(string packageName, string sampleName)
-        {
-            string jsonPath = string.Format("Packages/{0}/package.json", packageName);
-            string json = File.ReadAllText(jsonPath);
-            string version = Regex.Match(json, "\"version\"\\s*:\\s*\"([^\"]+)\"").Groups[1].Value;
-            string displayName = Regex.Match(json, "\"displayName\"\\s*:\\s*\"([^\"]+)\"").Groups[1].Value;
-            string src = string.Format("{0}/Samples~/{1}", Path.GetDirectoryName(jsonPath), sampleName);
-            string dst = string.Format("Assets/Samples/{0}/{1}/{2}", displayName, version, sampleName);
-            string previous = GetPreviousSamplePath(displayName, sampleName);
-
-            if (!string.IsNullOrEmpty(previous))
-            {
-                string msg = "A different version of the sample is already imported at\n\n"
-                             + previous
-                             + "\n\nIt will be deleted when you update. Are you sure you want to continue?";
-                if (!EditorUtility.DisplayDialog("Sample Importer", msg, "OK", "Cancel"))
-                    return;
-
-                FileUtil.DeleteFileOrDirectory(previous + ".meta");
-                FileUtil.DeleteFileOrDirectory(previous);
-
-                string versionDir = Path.GetDirectoryName(previous);
-                if (Directory.GetFiles(versionDir, "*.meta", SearchOption.TopDirectoryOnly).Length == 0)
-                {
-                    FileUtil.DeleteFileOrDirectory(versionDir + ".meta");
-                    FileUtil.DeleteFileOrDirectory(versionDir);
-                }
-            }
-
-            Directory.CreateDirectory(Path.GetDirectoryName(dst));
-            FileUtil.CopyFileOrDirectory(src, dst);
-            AssetDatabase.ImportAsset(dst, ImportAssetOptions.ImportRecursive);
-        }
-
-        [MenuItem("Assets/Samples/Import UIParticle Demo")]
-        static void ImportSample()
-        {
-            ImportSample("com.coffee.ui-particle", "Demo");
-        }
-
-        [MenuItem("Assets/Samples/Import UIParticle Demo (Cartoon FX & War FX Demo)")]
-        static void ImportSample_CFX()
-        {
-            ImportSample("com.coffee.ui-particle", "Cartoon FX & War FX Demo");
-        }
-#endif
-
-        [MenuItem("GameObject/UI/Particle System (Empty)", false, 2018)]
-        public static void AddParticleEmpty(MenuCommand menuCommand)
-        {
-            // Create empty UI element.
-            EditorApplication.ExecuteMenuItem("GameObject/UI/Image");
-            var ui = Selection.activeGameObject;
-            Object.DestroyImmediate(ui.GetComponent<Image>());
-
-            // Add UIParticle.
-            var uiParticle = ui.AddComponent<UIParticle>();
-            uiParticle.name = "UIParticle";
-            uiParticle.scale = 10;
-            uiParticle.rectTransform.sizeDelta = Vector2.zero;
-        }
-
-        [MenuItem("GameObject/UI/Particle System", false, 2019)]
-        public static void AddParticle(MenuCommand menuCommand)
-        {
-            // Create empty UIEffect.
-            AddParticleEmpty(menuCommand);
-            var uiParticle = Selection.activeGameObject.GetComponent<UIParticle>();
-
-            // Create ParticleSystem.
-            EditorApplication.ExecuteMenuItem("GameObject/Effects/Particle System");
-            var ps = Selection.activeGameObject;
-            ps.transform.SetParent(uiParticle.transform, false);
-            ps.transform.localPosition = Vector3.zero;
-
-            // Assign default material.
-            var renderer = ps.GetComponent<ParticleSystemRenderer>();
-            var defaultMat = AssetDatabase.GetBuiltinExtraResource<Material>("Default-Particle.mat");
-            renderer.material = defaultMat ? defaultMat : renderer.material;
-
-            // Refresh particles.
-            uiParticle.RefreshParticles();
-        }
-    }
-}

Scripts/MeshHelper.cs

@@ -1,9 +1,8 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.Profiling;
 
-namespace Coffee.UIExtensions
+namespace Coffee.UIParticleExtensions
 {
     internal static class MeshHelper
     {

Scripts/UIParticle.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Runtime.CompilerServices;
+using Coffee.UIParticleExtensions;
 using UnityEngine;
 using UnityEngine.Rendering;
 using UnityEngine.Serialization;

Scripts/UIParticleUpdater.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using Coffee.UIParticleExtensions;
 using UnityEngine;
 using UnityEngine.Profiling;
 
@@ -196,6 +197,10 @@ namespace Coffee.UIExtensions
                     Profiler.EndSample();
                 }
 
+                // #102: Do not bake particle system to mesh when the alpha is zero.
+                if (Mathf.Approximately( particle.canvasRenderer.GetInheritedAlpha(), 0))
+                    continue;
+
                 // Bake main particles.
                 var r = currentPs.GetComponent<ParticleSystemRenderer>();
                 if (CanBakeMesh(r))

Scripts/Utils.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 using System.Reflection;
 using UnityEngine;
 
-namespace Coffee.UIExtensions
+namespace Coffee.UIParticleExtensions
 {
     internal static class SpriteExtensions
     {

package.json

@@ -2,7 +2,7 @@
   "name": "com.coffee.ui-particle",
   "displayName": "UI Particle",
   "description": "This plugin provide a component to render particle effect for uGUI.\nThe particle rendering is maskable and sortable, without Camera, RenderTexture or Canvas.",
-  "version": "3.0.0-preview.35",
+  "version": "3.0.0-preview.36",
   "unity": "2018.2",
   "license": "MIT",
   "repository": {