f@0: #pragma once
f@0: 
f@0: #include "cinder/gl/gl.h"
f@0: #include <vector>
f@0: 
f@3: /**
f@3:  * The ParticleController creates/updates/draws and destroys particles
f@3:  */ 
f@0: class ParticleController {
f@0: 
f@0:     struct Particle {
f@0: 
f@4:         ci::vec2	mCloudCenter; // initial positin of the particle 
f@4:         ci::vec2	mVel;         // velocity 
f@4:         float       mCloudSize;   // how big is the area where particle float around. When a particle hits the 
f@4:                                   //   border of the area it gets deflected 
f@0: 
f@4:         int			mAge;      // when mAge == mLifeSpan the particle is disposed 
f@4:         int			mLifespan; // how long a particle lives
f@4:         bool        mFlyOver;  // some particles last longer and fly over the screen and reach the other user
f@0: 
f@0:     };
f@0: 
f@0:     static const int kMaxParticles = 150;
f@0: 
f@0: 	std::vector<Particle> mParticles;
f@0:     std::vector< ci::vec2 > mParticlePositions;
f@0: 
f@3:     // current number of active particles
f@0:     size_t mNumParticles;
f@0: 
f@4:     ci::gl::VboRef			mParticleVbo;    // virtual buffer object 
f@0:     ci::gl::BatchRef		mParticleBatch;
f@0: 
f@0:  public:
f@3:     /**
f@3:      * Every time addParticles is run, up to kMaxParticleAdd are added at once
f@3:      */ 
f@0:     static const int kMaxParticleAdd = 22;
f@0: 
f@0:     ParticleController();
f@3: 
f@3:     /**
f@3:      * Adds \a amount particles and places them in \a initialLocation. 
f@3:      * \cloudSize determines how far the particles can go
f@3:      */ 
f@0: 	void addParticles(int amount, const ci::vec2 &initialLocation, const float cloudSize);
f@0: 	
f@3:     /**
f@3:      * Updates position and age of the particles
f@3:      */ 
f@0:     void updateParticles();
f@0: 
f@3:     /**
f@3:      * Draws all the particles
f@3:      */ 
f@0:     inline void draw()
f@0:     {
f@0:         mParticleBatch->draw();
f@0:     }
f@0: 	
f@0: };
f@0: