#ifndef __EXPLOSION_H_INCLUDED__
#define __EXPLOSION_H_INCLUDED__


// 包含文件
#include "Particles.h"


// 常量與宏
const CVector PARTICLE_VELOCITY  (0.0f, 2.0f, 0.0f);
const CVector VELOCITY_VARIATION  (4.0f, 4.0f, 4.0f);
const CVector PARTICLE_ACCELERATION  (0.0f, -5.0f, 0.0f);
const float     PARTICLE_SIZE      = 5.0f;
const float     SIZE_VARIATION     = 2.0f;

#define FRAND   (((float)rand()-(float)rand())/RAND_MAX)

// 數(shù)據(jù)結(jié)構(gòu)
class CExplosion : public CParticleSystem
{
public:
	CExplosion(int maxParticles, CVector origin, float spread, GLuint texture);
	void  Update(float elapsedTime);
	void  Render();
	bool  IsDead() { return m_numParticles == 0; }
protected:
	void    InitializeParticle(int index);
	float   m_spread;
	GLuint  m_texture;     // 爆炸效果的紋理
};



#endif // __EXPLOSION_H_INCLUDED__