emitter.patch

diff --git a/Source/Urho3D/Urho2D/ParticleEmitter2D.cpp b/Source/Urho3D/Urho2D/ParticleEmitter2D.cpp
index 9e41548..3d72ed1 100644
--- a/Source/Urho3D/Urho2D/ParticleEmitter2D.cpp
+++ b/Source/Urho3D/Urho2D/ParticleEmitter2D.cpp
@@ -49,7 +49,8 @@ ParticleEmitter2D::ParticleEmitter2D(Context* context) :
     emissionTime_(0.0f),
     emitParticleTime_(0.0f),
     boundingBoxMinPoint_(Vector3::ZERO),
-    boundingBoxMaxPoint_(Vector3::ZERO)
+    boundingBoxMaxPoint_(Vector3::ZERO),
+    emitting_(true)
 {
     sourceBatches_.Resize(1);
     sourceBatches_[0].owner_ = this;
@@ -165,6 +166,15 @@ void ParticleEmitter2D::SetSpriteAttr(const ResourceRef& value)
         SetSprite(sprite);
 }
 
+void ParticleEmitter2D::SetEmitting(bool enable)
+{
+    if (enable != emitting_)
+    {
+        emitting_ = enable;
+        emitParticleTime_ = 0.0f;
+    }
+}
+
 ResourceRef ParticleEmitter2D::GetSpriteAttr() const
 {
     return Sprite2D::SaveToResourceRef(sprite_);
@@ -325,23 +335,26 @@ void ParticleEmitter2D::Update(float timeStep)
         }
     }
 
-    if (emissionTime_ > 0.0f)
+    if (emitting_)
     {
-        float worldAngle = GetNode()->GetWorldRotation().RollAngle();
+        if (emissionTime_ > 0.0f)
+        {
+            float worldAngle = GetNode()->GetWorldRotation().RollAngle();
 
-        float timeBetweenParticles = effect_->GetParticleLifeSpan() / particles_.Size();
-        emitParticleTime_ += timeStep;
+            float timeBetweenParticles = effect_->GetParticleLifeSpan() / particles_.Size();
+            emitParticleTime_ += timeStep;
 
-        while (emitParticleTime_ > 0.0f)
-        {
-            if (EmitParticle(worldPosition, worldAngle, worldScale))
-                UpdateParticle(particles_[numParticles_ - 1], emitParticleTime_, worldPosition, worldScale);
+            while (emitParticleTime_ > 0.0f)
+            {
+                if (EmitParticle(worldPosition, worldAngle, worldScale))
+                    UpdateParticle(particles_[numParticles_ - 1], emitParticleTime_, worldPosition, worldScale);
 
-            emitParticleTime_ -= timeBetweenParticles;
-        }
+                emitParticleTime_ -= timeBetweenParticles;
+            }
 
-        if (emissionTime_ > 0.0f)
-            emissionTime_ = Max(0.0f, emissionTime_ - timeStep);
+	if (emissionTime_ > 0.0f)
+	    emissionTime_ = Max(0.0f, emissionTime_ - timeStep);
+    }
     }
 
     sourceBatchesDirty_ = true;
diff --git a/Source/Urho3D/Urho2D/ParticleEmitter2D.h b/Source/Urho3D/Urho2D/ParticleEmitter2D.h
index 2c63796..9205017 100644
--- a/Source/Urho3D/Urho2D/ParticleEmitter2D.h
+++ b/Source/Urho3D/Urho2D/ParticleEmitter2D.h
@@ -116,6 +116,9 @@ public:
     void SetSpriteAttr(const ResourceRef& value);
     /// Return sprite attribute.
     ResourceRef GetSpriteAttr() const;
+    
+    void SetEmitting(bool enable);
+    bool IsEmitting() const { return emitting_; }
 
 private:
     /// Handle scene being assigned.
@@ -149,6 +152,8 @@ private:
     float emissionTime_;
     /// Emit particle time
     float emitParticleTime_;
+    /// Currently emitting flag.
+    bool emitting_;
     /// Particles.
     Vector<Particle2D> particles_;
     /// Bounding box min point.