www.pudn.com > Particles_OGL.zip > particle.h

#ifndef PARTICLE_H 
#define PARTICLE_H 
 
#include  
#include "vector.h" 
#include "gl_texture.h" 
 
// Creates an ARGB color 
#define ARGB(A, R, G, B) ( (int)((A & 0xFF) << 24 | \ 
								 (R & 0xFF) << 16 | \ 
								 (G & 0xFF) << 8 | \ 
								 (B & 0xFF)) ) 
								  
// Gets the A, R, G, and B from an ARGB color								  
#define GET_A(c) ((c >> 24) & 0xFF) 
#define GET_R(c) ((c >> 16) & 0xFF) 
#define GET_G(c) ((c >> 8) & 0xFF) 
#define GET_B(c) (c & 0xFF) 
 
// Returns a random percent between 0 - 1 
#define RAND_PERCENT() ((rand() & 0x7FFF) / ((float)0x7FFF)) 
 
// Returns a random number between (and including) "min" and "max" 
// Assumes "min" < "max" 
#define RAND(min, max) (min + (max - min) * RAND_PERCENT()) 
 
// The gravity that effects every particle 
// This number was reached by the "what looks good" method %) 								  
const float kParticleGravity = -9.81f / 10.0f; 
 
// The particle 
class CParticle 
{ 
	public: 
		 
		CParticle(); // Default constructor 
		 
		// This initializes a particle 
		bool init(const CPos &pos, const CVector &vel, float lifeSpan, float size, 
				  float angle = 0.0f, int color = 0xFFFFFFFF, const char *texName = NULL); 
		 
		void process(float dt); // Moves the particle each frame 
		void render(); // Renders the particle to screen 
		 
		// If the a particle's life is greater than zero, it's considered active 
		// otherwise it's deactivate 
		bool isAlive() { return (life > 0.0f); } 
	 
	private: 
	 
		CPos pos; // World position 
		CVector vel; // Velocity 
		 
		int color; // ARGB color of particle 
		float size; // Width/Height dimensions of the particle 
		float life; // Life span of particle in seconds 
		float angle; // Angle, in degrees, to rotate the texture's UVs every second 
		 
		CGLTexture texture; // The texture			  
}; 
 
#endif