ParticleBatch2D.h

#ifndef PARTICLEBATCH2D_H_INCLUDED
#define PARTICLEBATCH2D_H_INCLUDED
 
#include <functional>
 
#include "SpriteBatch.h"
 
namespace nta {
    struct Particle2D {
        Particle2D(){
        }
        Particle2D(crvec2 c, crvec2 v, crvec4 col) : center(c), velocity(v), color(col) {
        }
        glm::vec2 center;
        glm::vec2 velocity;
        glm::vec4 color;
        float life;
    };
    class ParticleBatch2D {
    private:
        int getFreeParticle() const;
        std::function<void(Particle2D&, float)> m_updateFunction;
        Particle2D* m_particles = nullptr;
        float m_initialLife;
        float m_decayRate;
        float m_radius;
        int m_maxParticles;
        int m_textureID;
    public:
        ParticleBatch2D();
        ~ParticleBatch2D();
        void init(float il, float dr, float r, int mp, int tex, std::function<void(Particle2D&, float)> updateFunc);
        void addParticle(Particle2D p);
        void draw(SpriteBatch& batch) const;
        void update(float dt);
        void clear();
    };
};
 
#endif // PARTICLEBATCH2D_H_INCLUDED