added cgmath, libanim, and libpsys

[andemo] / libs / psys / pattr.h

diff --git a/libs/psys/pattr.h b/libs/psys/pattr.h
new file mode 100644 (file)
index 0000000..da18c1f
--- /dev/null
+++ b/libs/psys/pattr.h
@@ -0,0 +1,84 @@
+/*
+libpsys - reusable particle system library.
+Copyright (C) 2011-2018  John Tsiombikas <nuclear@member.fsf.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef PATTR_H_
+#define PATTR_H_
+
+#include <stdio.h>
+#include "pstrack.h"
+#include "rndval.h"
+
+/* the particle attributes vary from 0 to 1 during its lifetime */
+struct psys_particle_attributes {
+       struct psys_track3 color;
+       struct psys_track alpha;
+       struct psys_track size;
+};
+
+enum psys_blending { PSYS_ADD, PSYS_ALPHA };
+
+struct psys_attributes {
+       unsigned int tex;       /* OpenGL texture to use for the billboard */
+
+       struct psys_track3 spawn_range; /* radius of emmiter */
+       struct psys_track rate;                 /* spawn rate particles per sec */
+       struct psys_anm_rnd life;               /* particle life in seconds */
+       struct psys_anm_rnd size;               /* base particle size */
+       struct psys_anm_rnd3 dir;               /* particle shoot direction */
+
+       struct psys_track3 grav;                /* external force (usually gravity) */
+       float drag;     /* I don't think this needs to animate */
+
+       enum psys_blending blending;
+
+       /* particle attributes */
+       struct psys_particle_attributes part_attr;
+
+       /* limits */
+       int max_particles;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void psys_texture_loader(unsigned int (*load)(const char*, void*), void (*unload)(unsigned int, void*), void *cls);
+
+struct psys_attributes *psys_create_attr(void);
+void psys_free_attr(struct psys_attributes *attr);
+
+int psys_init_attr(struct psys_attributes *attr);
+void psys_destroy_attr(struct psys_attributes *attr);
+
+/* copies particle system attributes src to dest
+ * XXX: dest must have been initialized first
+ */
+void psys_copy_attr(struct psys_attributes *dest, const struct psys_attributes *src);
+
+void psys_eval_attr(struct psys_attributes *attr, anm_time_t tm);
+
+int psys_load_attr(struct psys_attributes *attr, const char *fname);
+int psys_load_attr_stream(struct psys_attributes *attr, FILE *fp);
+
+int psys_save_attr(const struct psys_attributes *attr, const char *fname);
+int psys_save_attr_stream(const struct psys_attributes *attr, FILE *fp);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PATTR_H_ */