Added support for multiple emitters. (ParticleEmitter component now friend class to ParticleSystem)

src/Components/ParticleEmitter.h

@@ -5,11 +5,15 @@
 #include "Color.h"
 #include <vector>
 
+namespace Systems { class ParticleSystem; }
+
 namespace Components
 {
 
 struct ParticleEmitter : Component
 {
+	friend class Systems::ParticleSystem;
+
 	EntityID ParticleTemplate;
 	float SpawnFrequency;
 	int SpawnCount;
@@ -19,6 +23,9 @@ struct ParticleEmitter : Component
 	double LifeTime;
 	std::vector<glm::vec3> VelocitySpectrum;
 	std::vector<glm::vec3> AngularVelocitySpectrum;
+
+private:
+	double TimeSinceLastSpawn;
 };
 
 }