# HG changeset patch
# User John Tsiombikas <nuclear@mutantstargoat.com>
# Date 1317098574 -10800
# Node ID d774738f50f6009eba30204f58fa4f5580c75626
# Parent  613d2bf3ea1fb97dd80de802ed8c5b05e77c56a7
almost finished with the reorg (2)

diff -r 613d2bf3ea1f -r d774738f50f6 src/pattr.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pattr.c	Tue Sep 27 07:42:54 2011 +0300
@@ -0,0 +1,105 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include "pattr.h"
+#include "psys_gl.h"
+
+static void *tex_cls;
+static unsigned int (*load_texture)(const char*, void*) = psys_gl_load_texture;
+static void (*unload_texture)(unsigned int, void*) = psys_gl_unload_texture;
+
+void psys_texture_loader(unsigned int (*load)(const char*, void*), void (*unload)(unsigned int, void*), void *cls)
+{
+	load_texture = load;
+	unload_texture = unload;
+	tex_cls = cls;
+}
+
+int psys_init_attr(struct psys_attributes *attr)
+{
+	memset(attr, 0, sizeof *attr);
+
+	if(psys_init_track3(&attr->spawn_range) == -1)
+		goto err;
+	if(psys_init_track(&attr->rate) == -1)
+		goto err;
+	if(psys_init_anm_rnd(&attr->life) == -1)
+		goto err;
+	if(psys_init_anm_rnd(&attr->size) == -1)
+		goto err;
+	if(psys_init_anm_rnd3(&attr->dir) == -1)
+		goto err;
+	if(psys_init_track3(&attr->grav) == -1)
+		goto err;
+
+	attr->max_particles = -1;
+	return 0;
+
+err:
+	psys_destroy_attr(attr);
+	return -1;
+}
+
+void psys_destroy_attr(struct psys_attributes *attr)
+{
+	psys_destroy_track3(&attr->spawn_range);
+	psys_destroy_track(&attr->rate);
+	psys_destroy_anm_rnd(&attr->life);
+	psys_destroy_anm_rnd(&attr->size);
+	psys_destroy_anm_rnd3(&attr->dir);
+	psys_destroy_track3(&attr->grav);
+
+	if(attr->tex && unload_texture) {
+		unload_texture(attr->tex, tex_cls);
+	}
+}
+
+void psys_eval_attr(struct psys_attributes *attr, anm_time_t tm)
+{
+	psys_eval_track3(&attr->spawn_range, tm);
+	psys_eval_track(&attr->rate, tm);
+	psys_eval_anm_rnd(&attr->life, tm);
+	psys_eval_anm_rnd(&attr->size, tm);
+	psys_eval_anm_rnd3(&attr->dir, tm);
+	psys_eval_track3(&attr->grav, tm);
+}
+
+int psys_load_attr(struct psys_attributes *attr, const char *fname)
+{
+	FILE *fp;
+	int res;
+
+	if(!(fp = fopen(fname, "r"))) {
+		fprintf(stderr, "%s: failed to read file: %s: %s\n", __func__, fname, strerror(errno));
+		return -1;
+	}
+	res = psys_load_attr_stream(attr, fp);
+	fclose(fp);
+	return res;
+}
+
+int psys_load_attr_stream(struct psys_attributes *attr, FILE *fp)
+{
+	return -1;	/* TODO */
+}
+
+
+int psys_save_attr(struct psys_attributes *attr, const char *fname)
+{
+	FILE *fp;
+	int res;
+
+	if(!(fp = fopen(fname, "w"))) {
+		fprintf(stderr, "%s: failed to write file: %s: %s\n", __func__, fname, strerror(errno));
+		return -1;
+	}
+	res = psys_save_attr_stream(attr, fp);
+	fclose(fp);
+	return res;
+}
+
+int psys_save_attr_stream(struct psys_attributes *attr, FILE *fp)
+{
+	return -1;	/* TODO */
+}
diff -r 613d2bf3ea1f -r d774738f50f6 src/pattr.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pattr.h	Tue Sep 27 07:42:54 2011 +0300
@@ -0,0 +1,37 @@
+#ifndef PATTR_H_
+#define PATTR_H_
+
+#include "pstrack.h"
+#include "rndval.h"
+
+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 */
+
+	/* limits */
+	int max_particles;
+};
+
+void psys_texture_loader(unsigned int (*load)(const char*, void*), void (*unload)(unsigned int, void*), void *cls);
+
+int psys_init_attr(struct psys_attributes *attr);
+void psys_destroy_attr(struct psys_attributes *attr);
+
+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(struct psys_attributes *attr, const char *fname);
+int psys_save_attr_stream(struct psys_attributes *attr, FILE *fp);
+
+#endif
diff -r 613d2bf3ea1f -r d774738f50f6 src/psys_gl.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/psys_gl.h	Tue Sep 27 07:42:54 2011 +0300
@@ -0,0 +1,14 @@
+#ifndef PSYS_GL_H_
+#define PSYS_GL_H_
+
+struct psys_particle;
+struct psys_emitter;
+
+void psys_gl_draw_start(struct psys_emitter *em, void *cls);
+void psys_gl_draw(struct psys_emitter *em, struct psys_particle *p, void *cls);
+void psys_gl_draw_end(struct psys_emitter *em, void *cls);
+
+unsigned int psys_gl_load_texture(const char *fname, void *cls);
+void psys_gl_unload_texture(unsigned int tex, void *cls);
+
+#endif	/* PSYS_GL_H_ */