1 #ifndef PSYS_H_

2 #define PSYS_H_

3

4 #include <vector>

5 #include "vec3.h"

6 #include "image.h"

7

8 struct PSysParam {

9 // emitter parameters

10 float spawn_rate;

11 float spawn_range;

12 float life, life_range;

13 float size, size_range;

14 Vector3 gravity;

15 Image *spawn_map;

16 float spawn_map_speed;

17

18 // particle parameters

19 Image *pimg;

20 Vector3 pcolor_start, pcolor_mid, pcolor_end;

21 float palpha_start, palpha_mid, palpha_end;

22 float pscale_start, pscale_mid, pscale_end;

23 };

24

25 void psys_default(PSysParam *pp);

26

27 struct Particle {

28 Vector3 pos, vel;

29 Vector3 color;

30 float alpha;

31 float life, max_life;

32 float size, scale;

33

34 struct Particle *next;

35 };

36

37 class ParticleSystem {

38 private:

39 float spawn_pending;

40 Particle *plist;

41 int pcount;

42

43 float active_time;

44 bool expl;

45 Vector3 expl_cent;

46 float expl_force, expl_dur;

47 float expl_life;

48

49 Vector3 *smcache;

50 int smcache_max[256];

51 void gen_spawnmap(int count);

52

53 void spawn_particle();

54

55 public:

56 Vector3 pos;

57 PSysParam pp;

58 bool active;

59

60 ParticleSystem();

61 ~ParticleSystem();

62

63 void explode(const Vector3 &c, float force, float dur = 1.0, float life = 0.0);

64

65 bool alive() const;

66

67 void update(float dt);

68 void draw() const;

69 };

70

71 #endif // PSYS_H_