1 #ifndef PATTR_H_

2 #define PATTR_H_

3

4 #include "pstrack.h"

5 #include "rndval.h"

6

7 /* the particle attributes vary from 0 to 1 during its lifetime */

8 struct psys_particle_attributes {

9 struct psys_track3 color;

10 struct psys_track alpha;

11 struct psys_track size;

12 };

13

14 struct psys_attributes {

15 unsigned int tex; /* OpenGL texture to use for the billboard */

16

17 struct psys_track3 spawn_range; /* radius of emmiter */

18 struct psys_track rate; /* spawn rate particles per sec */

19 struct psys_anm_rnd life; /* particle life in seconds */

20 struct psys_anm_rnd size; /* base particle size */

21 struct psys_anm_rnd3 dir; /* particle shoot direction */

22

23 struct psys_track3 grav; /* external force (usually gravity) */

24 float drag; /* I don't think this needs to animate */

25

26 /* particle attributes */

27 struct psys_particle_attributes part_attr;

28

29 /* limits */

30 int max_particles;

31 };

32

33 #ifdef __cplusplus

34 extern "C" {

35 #endif

36

37 void psys_texture_loader(unsigned int (*load)(const char*, void*), void (*unload)(unsigned int, void*), void *cls);

38

39 struct psys_attributes *psys_create_attr(void);

40 void psys_free_attr(struct psys_attributes *attr);

41

42 int psys_init_attr(struct psys_attributes *attr);

43 void psys_destroy_attr(struct psys_attributes *attr);

44

45 /* copies particle system attributes src to dest

46 * XXX: dest must have been initialized first

47 */

48 void psys_copy_attr(struct psys_attributes *dest, const struct psys_attributes *src);

49

50 void psys_eval_attr(struct psys_attributes *attr, anm_time_t tm);

51

52 int psys_load_attr(struct psys_attributes *attr, const char *fname);

53 int psys_load_attr_stream(struct psys_attributes *attr, FILE *fp);

54

55 int psys_save_attr(const struct psys_attributes *attr, const char *fname);

56 int psys_save_attr_stream(const struct psys_attributes *attr, FILE *fp);

57

58 #ifdef __cplusplus

59 }

60 #endif

61

62 #endif /* PATTR_H_ */