Fixed large burst of particles when dramatically increasing the emission rate of a ParticleSystem. (fixes #1169)

changes.txt

@@ -18,6 +18,7 @@ Released: N/A
   * Fixed gamma correction of ImageFonts and BMFonts with colored images.
   * Fixed the default shader improperly applying gamma correction to per-vertex colors when gamma correction is requested but not supported on OpenGL ES.
   * Fixed text coloring breaking because of an empty string.
+  * Fixed large burst of particles when dramatically increasing the emission rate of a ParticleSystem.
 
   * Improved performance of Channel methods by roughly 2x in many cases.
   

src/modules/graphics/ParticleSystem.cpp

@@ -437,6 +437,9 @@ void ParticleSystem::setEmissionRate(float rate)
 	if (rate < 0.0f)
 		throw love::Exception("Invalid emission rate");
 	emissionRate = rate;
+
+	// Prevent an explosion when dramatically increasing the rate
+	emitCounter = std::min(emitCounter, 1.0f/rate);
 }
 
 float ParticleSystem::getEmissionRate() const
@@ -932,9 +935,6 @@ void ParticleSystem::update(float dt)
 			addParticle(1.0f - (emitCounter - rate) / total);
 			emitCounter -= rate;
 		}
-		/*int particles = (int)(emissionRate * dt);
-		 for (int i = 0; i != particles; i++)
-		 add();*/
 
 		life -= dt;
 		if (lifetime != -1 && life < 0)