particle.h

   1 #pragma once
   2 #include "gr.h"
   3
   4 typedef void (*TempFunc)(double temp, SDL_Color *c);
   5 //x(t+dt) = x(t)+dt*v(t)
   6 //vx(t+dt) = vx(t)*(1-fx*dt) +dt*a(t)
   7 //when t <=0.0 particle dies
   8 typedef struct{
   9         double x;
  10         double y;
  11         double t;
  12         int z;
  13         double vx;
  14         double vy;
  15         double vt;
  16         double ax;
  17         double ay;
  18         double at;
  19         double fx;
  20         double fy;
  21         double ft;
  22         Sprite *s;
  23         TempFunc tf;
  24 }Particle;
  25
  26 void SetParticleBoundingBox(double x, double y, double xx, double yy); // x,y - coords; xx,yy -- width, height; THIS FUNCTION SHOULD BE CALLED BEFORE USING PARTICLES
  27 void AddParticle(Particle *p); //doesn't copy p, p will be freed automagically when it is not needed anymore
  28 void UpdateAndQueueDrawParticles(double dt);