Add option to disable particles preview in scene view and play only looping effects

#1767

Source/Editor/Editor.cs

@@ -1364,6 +1364,7 @@ namespace FlaxEditor
             public byte AutoReloadScriptsOnMainWindowFocus;
             public byte ForceScriptCompilationOnStartup;
             public byte UseAssetImportPathRelative;
+            public byte EnableParticlesPreview;
             public byte AutoRebuildCSG;
             public float AutoRebuildCSGTimeoutMs;
             public byte AutoRebuildNavMesh;

Source/Editor/Managed/ManagedEditor.h

@@ -27,6 +27,7 @@ API_CLASS(Namespace="FlaxEditor", Name="Editor", NoSpawn, NoConstructor) class M
         byte AutoReloadScriptsOnMainWindowFocus = 1;
         byte ForceScriptCompilationOnStartup = 1;
         byte UseAssetImportPathRelative = 1;
+        byte EnableParticlesPreview = 1;
         byte AutoRebuildCSG = 1;
         float AutoRebuildCSGTimeoutMs = 50;
         byte AutoRebuildNavMesh = 1;

Source/Editor/Options/OptionsModule.cs

@@ -192,6 +192,7 @@ namespace FlaxEditor.Options
             internalOptions.AutoReloadScriptsOnMainWindowFocus = (byte)(Options.General.AutoReloadScriptsOnMainWindowFocus ? 1 : 0);
             internalOptions.ForceScriptCompilationOnStartup = (byte)(Options.General.ForceScriptCompilationOnStartup ? 1 : 0);
             internalOptions.UseAssetImportPathRelative = (byte)(Options.General.UseAssetImportPathRelative ? 1 : 0);
+            internalOptions.EnableParticlesPreview = (byte)(Options.Visual.EnableParticlesPreview ? 1 : 0);
             internalOptions.AutoRebuildCSG = (byte)(Options.General.AutoRebuildCSG ? 1 : 0);
             internalOptions.AutoRebuildCSGTimeoutMs = Options.General.AutoRebuildCSGTimeoutMs;
             internalOptions.AutoRebuildNavMesh = (byte)(Options.General.AutoRebuildNavMesh ? 1 : 0);

Source/Editor/Options/VisualOptions.cs

@@ -59,5 +59,12 @@ namespace FlaxEditor.Options
         [DefaultValue(true)]
         [EditorDisplay("Quality", "Enable MSAA For Debug Draw"), EditorOrder(500), Tooltip("Determines whether enable MSAA for DebugDraw primitives rendering. Helps with pixel aliasing but reduces performance.")]
         public bool EnableMSAAForDebugDraw { get; set; } = true;
+
+        /// <summary>
+        /// Gets or sets a value indicating whether show looping particle effects in Editor viewport to simulate in-game look.
+        /// </summary>
+        [DefaultValue(true)]
+        [EditorDisplay("Preview"), EditorOrder(1000)]
+        public bool EnableParticlesPreview { get; set; } = true;
     }
 }

Source/Engine/Particles/ParticleEffect.cpp

@@ -446,15 +446,21 @@ void ParticleEffect::Update()
 #if USE_EDITOR
 
 #include "Editor/Editor.h"
+#include "Editor/Managed/ManagedEditor.h"
 
 void ParticleEffect::UpdateExecuteInEditor()
 {
     // Auto-play in Editor
-    if (!Editor::IsPlayMode && !_isStopped)
+    if (!Editor::IsPlayMode && !_isStopped && IsLooping && PlayOnStart && Editor::Managed->ManagedEditorOptions.EnableParticlesPreview)
     {
         _isPlaying = true;
         Update();
     }
+    else if (!Editor::IsPlayMode && _isPlaying)
+    {
+        _isPlaying = false;
+        ResetSimulation();
+    }
 }
 
 #endif