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1 #ifndef PATTR_H_
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2 #define PATTR_H_
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3
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4 #include "pstrack.h"
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5 #include "rndval.h"
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6
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7 /* the particle attributes vary from 0 to 1 during its lifetime */
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8 struct psys_particle_attributes {
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9 struct psys_track3 color;
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10 struct psys_track alpha;
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11 struct psys_track size;
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12 };
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13
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14 struct psys_attributes {
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15 unsigned int tex; /* OpenGL texture to use for the billboard */
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16
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17 struct psys_track3 spawn_range; /* radius of emmiter */
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18 struct psys_track rate; /* spawn rate particles per sec */
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19 struct psys_anm_rnd life; /* particle life in seconds */
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20 struct psys_anm_rnd size; /* base particle size */
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21 struct psys_anm_rnd3 dir; /* particle shoot direction */
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22
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23 struct psys_track3 grav; /* external force (usually gravity) */
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24 float drag; /* I don't think this needs to animate */
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25
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26 /* particle attributes */
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27 struct psys_particle_attributes part_attr;
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28
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29 /* limits */
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30 int max_particles;
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31 };
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32
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33 #ifdef __cplusplus
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34 extern "C" {
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35 #endif
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36
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37 void psys_texture_loader(unsigned int (*load)(const char*, void*), void (*unload)(unsigned int, void*), void *cls);
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38
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39 struct psys_attributes *psys_create_attr(void);
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40 void psys_free_attr(struct psys_attributes *attr);
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41
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42 int psys_init_attr(struct psys_attributes *attr);
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43 void psys_destroy_attr(struct psys_attributes *attr);
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44
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45 /* copies particle system attributes src to dest
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46 * XXX: dest must have been initialized first
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47 */
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48 void psys_copy_attr(struct psys_attributes *dest, const struct psys_attributes *src);
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49
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50 void psys_eval_attr(struct psys_attributes *attr, anm_time_t tm);
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51
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52 int psys_load_attr(struct psys_attributes *attr, const char *fname);
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53 int psys_load_attr_stream(struct psys_attributes *attr, FILE *fp);
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54
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55 int psys_save_attr(const struct psys_attributes *attr, const char *fname);
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56 int psys_save_attr_stream(const struct psys_attributes *attr, FILE *fp);
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57
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58 #ifdef __cplusplus
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59 }
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60 #endif
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61
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62 #endif /* PATTR_H_ */
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