Better handling stopping/resetting non-looping effect.

Source/Engine/Particles/ParticleEffect.cpp

@@ -283,11 +283,8 @@ void ParticleEffect::UpdateSimulation(bool singleFrame)
 
 void ParticleEffect::Play()
 {
-    // Reset simulation when play is called and particle system is time is complete - ex. if IsLooping is false and simulation is complete
-    if (!IsLooping && Instance.Time >= (float)ParticleSystem->DurationFrames / ParticleSystem->FramesPerSecond)
-        ResetSimulation();
-
     _isPlaying = true;
+    _isStopped = false;
 }
 
 void ParticleEffect::Pause()
@@ -297,6 +294,7 @@ void ParticleEffect::Pause()
 
 void ParticleEffect::Stop()
 {
+    _isStopped = true;
     _isPlaying = false;
     ResetSimulation();
 }
@@ -452,7 +450,7 @@ void ParticleEffect::Update()
 void ParticleEffect::UpdateExecuteInEditor()
 {
     // Auto-play in Editor
-    if (!Editor::IsPlayMode)
+    if (!Editor::IsPlayMode && !_isStopped)
     {
         _isPlaying = true;
         Update();

Source/Engine/Particles/ParticleEffect.h

@@ -185,6 +185,7 @@ private:
     Array<ParticleEffectParameter> _parameters; // Cached for scripting API
     Array<ParameterOverride> _parametersOverrides; // Cached parameter modifications to be applied to the parameters
     bool _isPlaying = false;
+    bool _isStopped = false;
 
 public:
     /// <summary>

Source/Engine/Particles/Particles.cpp

@@ -1318,8 +1318,8 @@ void ParticlesSystem::Job(int32 index)
                     emitterInstance.Buffer = nullptr;
                 }
             }
-            // Set is playing to false because it is not playing anymore.
-            effect->Pause();
+            // Stop playing effect.
+            effect->Stop();
             return;
         }
     }