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particles.cpp
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#ifdef _WIN32
#include "windows.h"
#endif
#include "string.h"
#include "stdio.h"
#include "math.h"
#ifdef __APPLE__
#include <OpenGL/gl.h>
#include <OpenGL/glu.h>
#include <GLUT/glut.h>
#else
#include "GL/gl.h"
#include "GL/glu.h"
#include "GL/glut.h"
#endif
#include "SDL/SDL.h"
#include "SDL/SDL_mixer.h"
#include "list.h"
#include "vector.h"
#include "cmc.h"
#include "3dobject.h"
#include "shadow3dobject.h"
#include "piece3dobject.h"
#include "myglutaux.h"
#include "nether.h"
PARTICLE::PARTICLE(void)
{
size1=size2=0;
r=g=b=0;
a1=a2=0;
lifetime=acttime=0;
} /* PARTICLE::PARTICLE */
PARTICLE::PARTICLE(Vector p,Vector spd1,Vector spd2,float sz1,float sz2,float rp,float gp,float bp,float a1p,float a2p,int lt)
{
pos=p;
speed1=spd1;
speed2=spd2;
size1=sz1;
size2=sz2;
r=rp;
g=gp;
b=gp;
a1=a1p;
a2=a2p;
lifetime=lt;
acttime=0;
} /* PARTICLE::PARTICLE */
void NETHER::DrawParticle(PARTICLE *p)
{
float val,val2;
float sz;
val2=float(p->acttime)/float(p->lifetime);
val=1-val2;
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glTranslatef(p->pos.x,p->pos.y,p->pos.z);
glDepthMask(GL_FALSE);
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
sz=val*p->size1+val2*p->size2;
glNormal3f(0,0,1);
glBegin(GL_TRIANGLES);
glColor4f(p->r,p->g,p->b,val*p->a1+val2*p->a2);
glVertex3f(0,0,0);
glColor4f(p->r,p->g,p->b,0);
glVertex3f(sz,0,0);
glVertex3f(0,sz,0);
glColor4f(p->r,p->g,p->b,val*p->a1+val2*p->a2);
glVertex3f(0,0,0);
glColor4f(p->r,p->g,p->b,0);
glVertex3f(0,sz,0);
glVertex3f(-sz,0,0);
glColor4f(p->r,p->g,p->b,val*p->a1+val2*p->a2);
glVertex3f(0,0,0);
glColor4f(p->r,p->g,p->b,0);
glVertex3f(-sz,0,0);
glVertex3f(0,-sz,0);
glColor4f(p->r,p->g,p->b,val*p->a1+val2*p->a2);
glVertex3f(0,0,0);
glColor4f(p->r,p->g,p->b,0);
glVertex3f(0,-sz,0);
glVertex3f(sz,0,0);
glEnd();
glDisable(GL_BLEND);
glDepthMask(GL_TRUE);
glPopMatrix();
} /* NETHER::DrawParticle */
bool NETHER::CycleParticle(PARTICLE *p)
{
float val,val2;
val2=float(p->acttime)/float(p->lifetime);
val=1-val2;
p->pos=p->pos+(p->speed1*val+p->speed2*val2);
p->acttime++;
if (p->acttime>=p->lifetime) return false;
return true;
} /* NETHER::CyclePArticle */