progs/demos/particles.h

   1 /*
   2  * This program is under the GNU GPL.
   3  * Use at your own risk.
   4  *
   5  * written by David Bucciarelli (humanware@plus.it)
   6  *            Humanware s.r.l.
   7  */
   8
   9 #ifndef PARTICLES_H
  10 #define PARTICLES_H
  11
  12 #include <GL/gl.h>
  13
  14 class particle {
  15  protected:
  16   float age;         // in seconds
  17   float acc[3];
  18   float vel[3];
  19   float pos[3];
  20
  21  public:
  22   particle();
  23   virtual ~particle() {};
  24
  25   virtual void beginDraw(void) {};
  26   virtual void draw(void)=0;
  27   virtual void endDraw(void) {};
  28
  29   virtual void elapsedTime(float);
  30   virtual void checkAge(void) {};
  31 };
  32
  33 class particleSystem {
  34  protected:
  35   particle **part;
  36
  37   float t;
  38
  39   unsigned long particleNum;
  40  public:
  41   particleSystem();
  42   ~particleSystem();
  43
  44   void addParticle(particle *);
  45
  46   void reset(void);
  47
  48   void draw(void);
  49
  50   void addTime(float);
  51 };
  52
  53 class rainParticle : public particle {
  54  protected:
  55   static float min[3];
  56   static float max[3];
  57   static float partLength;
  58
  59   float oldpos[3];
  60
  61   void init(void);
  62  public:
  63   rainParticle();
  64
  65   static void setRainingArea(float, float, float,
  66                              float, float, float);
  67   static void setLength(float);
  68   static float getLength(void) { return partLength; };
  69
  70   void beginDraw(void) { glBegin(GL_LINES); };
  71   void draw(void);
  72   void endDraw(void) { glEnd(); };
  73
  74   void elapsedTime(float);
  75
  76   void checkAge(void);
  77
  78   void randomHeight(void);
  79 };
  80
  81 #endif