nuclear@6: #include <stdio.h>
nuclear@6: #include <stdlib.h>
nuclear@6: #include <string.h>
nuclear@6: #include <errno.h>
nuclear@15: #include <ctype.h>
nuclear@15: 
nuclear@15: #ifdef _MSC_VER
nuclear@15: #include <malloc.h>
nuclear@15: #else
nuclear@15: #include <alloca.h>
nuclear@15: #endif
nuclear@15: 
nuclear@6: #include "pattr.h"
nuclear@6: #include "psys_gl.h"
nuclear@6: 
nuclear@14: enum {
nuclear@14: 	OPT_STR,
nuclear@14: 	OPT_NUM,
nuclear@14: 	OPT_NUM_RANGE,
nuclear@14: 	OPT_VEC,
nuclear@14: 	OPT_VEC_RANGE
nuclear@14: };
nuclear@14: 
nuclear@14: struct cfgopt {
nuclear@14: 	char *name;
nuclear@14: 	int type;
nuclear@14: 	long tm;
nuclear@14: 	char *valstr;
nuclear@14: 	vec3_t val, valrng;
nuclear@14: };
nuclear@14: 
nuclear@9: static int init_particle_attr(struct psys_particle_attributes *pattr);
nuclear@9: static void destroy_particle_attr(struct psys_particle_attributes *pattr);
nuclear@15: static int get_cfg_opt(const char *line, struct cfgopt *opt);
nuclear@13: static char *stripspace(char *str);
nuclear@9: 
nuclear@6: static void *tex_cls;
nuclear@6: static unsigned int (*load_texture)(const char*, void*) = psys_gl_load_texture;
nuclear@6: static void (*unload_texture)(unsigned int, void*) = psys_gl_unload_texture;
nuclear@6: 
nuclear@14: 
nuclear@6: void psys_texture_loader(unsigned int (*load)(const char*, void*), void (*unload)(unsigned int, void*), void *cls)
nuclear@6: {
nuclear@6: 	load_texture = load;
nuclear@6: 	unload_texture = unload;
nuclear@6: 	tex_cls = cls;
nuclear@6: }
nuclear@6: 
nuclear@6: int psys_init_attr(struct psys_attributes *attr)
nuclear@6: {
nuclear@6: 	memset(attr, 0, sizeof *attr);
nuclear@6: 
nuclear@6: 	if(psys_init_track3(&attr->spawn_range) == -1)
nuclear@6: 		goto err;
nuclear@6: 	if(psys_init_track(&attr->rate) == -1)
nuclear@6: 		goto err;
nuclear@6: 	if(psys_init_anm_rnd(&attr->life) == -1)
nuclear@6: 		goto err;
nuclear@6: 	if(psys_init_anm_rnd(&attr->size) == -1)
nuclear@6: 		goto err;
nuclear@6: 	if(psys_init_anm_rnd3(&attr->dir) == -1)
nuclear@6: 		goto err;
nuclear@6: 	if(psys_init_track3(&attr->grav) == -1)
nuclear@6: 		goto err;
nuclear@6: 
nuclear@9: 	if(init_particle_attr(&attr->part_attr) == -1)
nuclear@9: 		goto err;
nuclear@9: 
nuclear@6: 	attr->max_particles = -1;
nuclear@8: 
nuclear@8: 	anm_set_track_default(&attr->size.value.trk, 1.0);
nuclear@8: 	anm_set_track_default(&attr->life.value.trk, 1.0);
nuclear@8: 
nuclear@6: 	return 0;
nuclear@6: 
nuclear@6: err:
nuclear@6: 	psys_destroy_attr(attr);
nuclear@6: 	return -1;
nuclear@6: }
nuclear@6: 
nuclear@9: 
nuclear@9: static int init_particle_attr(struct psys_particle_attributes *pattr)
nuclear@9: {
nuclear@9: 	if(psys_init_track3(&pattr->color) == -1) {
nuclear@9: 		return -1;
nuclear@9: 	}
nuclear@9: 	if(psys_init_track(&pattr->alpha) == -1) {
nuclear@9: 		psys_destroy_track3(&pattr->color);
nuclear@9: 		return -1;
nuclear@9: 	}
nuclear@9: 	if(psys_init_track(&pattr->size) == -1) {
nuclear@9: 		psys_destroy_track3(&pattr->color);
nuclear@9: 		psys_destroy_track(&pattr->alpha);
nuclear@9: 		return -1;
nuclear@9: 	}
nuclear@9: 
nuclear@9: 	anm_set_track_default(&pattr->color.x, 1.0);
nuclear@9: 	anm_set_track_default(&pattr->color.y, 1.0);
nuclear@9: 	anm_set_track_default(&pattr->color.z, 1.0);
nuclear@9: 	anm_set_track_default(&pattr->alpha.trk, 1.0);
nuclear@9: 	anm_set_track_default(&pattr->size.trk, 1.0);
nuclear@9: 	return 0;
nuclear@9: }
nuclear@9: 
nuclear@9: 
nuclear@6: void psys_destroy_attr(struct psys_attributes *attr)
nuclear@6: {
nuclear@6: 	psys_destroy_track3(&attr->spawn_range);
nuclear@6: 	psys_destroy_track(&attr->rate);
nuclear@6: 	psys_destroy_anm_rnd(&attr->life);
nuclear@6: 	psys_destroy_anm_rnd(&attr->size);
nuclear@6: 	psys_destroy_anm_rnd3(&attr->dir);
nuclear@6: 	psys_destroy_track3(&attr->grav);
nuclear@6: 
nuclear@9: 	destroy_particle_attr(&attr->part_attr);
nuclear@9: 
nuclear@6: 	if(attr->tex && unload_texture) {
nuclear@6: 		unload_texture(attr->tex, tex_cls);
nuclear@6: 	}
nuclear@6: }
nuclear@6: 
nuclear@9: static void destroy_particle_attr(struct psys_particle_attributes *pattr)
nuclear@9: {
nuclear@9: 	psys_destroy_track3(&pattr->color);
nuclear@9: 	psys_destroy_track(&pattr->alpha);
nuclear@9: 	psys_destroy_track(&pattr->size);
nuclear@9: }
nuclear@9: 
nuclear@6: void psys_eval_attr(struct psys_attributes *attr, anm_time_t tm)
nuclear@6: {
nuclear@6: 	psys_eval_track3(&attr->spawn_range, tm);
nuclear@6: 	psys_eval_track(&attr->rate, tm);
nuclear@6: 	psys_eval_anm_rnd(&attr->life, tm);
nuclear@6: 	psys_eval_anm_rnd(&attr->size, tm);
nuclear@6: 	psys_eval_anm_rnd3(&attr->dir, tm);
nuclear@6: 	psys_eval_track3(&attr->grav, tm);
nuclear@6: }
nuclear@6: 
nuclear@6: int psys_load_attr(struct psys_attributes *attr, const char *fname)
nuclear@6: {
nuclear@6: 	FILE *fp;
nuclear@6: 	int res;
nuclear@6: 
nuclear@6: 	if(!(fp = fopen(fname, "r"))) {
nuclear@6: 		fprintf(stderr, "%s: failed to read file: %s: %s\n", __func__, fname, strerror(errno));
nuclear@6: 		return -1;
nuclear@6: 	}
nuclear@6: 	res = psys_load_attr_stream(attr, fp);
nuclear@6: 	fclose(fp);
nuclear@6: 	return res;
nuclear@6: }
nuclear@6: 
nuclear@6: int psys_load_attr_stream(struct psys_attributes *attr, FILE *fp)
nuclear@6: {
nuclear@13: 	int lineno = 0;
nuclear@13: 	char buf[512];
nuclear@13: 
nuclear@13: 	psys_init_attr(attr);
nuclear@13: 
nuclear@13: 	while(fgets(buf, sizeof buf, fp)) {
nuclear@14: 		struct cfgopt opt;
nuclear@13: 
nuclear@13: 		lineno++;
nuclear@13: 
nuclear@14: 		if(get_cfg_opt(buf, &opt) == -1) {
nuclear@14: 			goto err;
nuclear@13: 		}
nuclear@13: 
nuclear@14: 		if(strcmp(opt.name, "texture")) {
nuclear@14: 			if(opt.type != OPT_STR) {
nuclear@14: 				goto err;
nuclear@14: 			}
nuclear@15: 			if(!(attr->tex = load_texture(opt.valstr, tex_cls))) {
nuclear@15: 				fprintf(stderr, "failed to load texture: %s\n", opt.valstr);
nuclear@15: 				goto err;
nuclear@15: 			}
nuclear@15: 		} else if(opt.type == OPT_STR) {
nuclear@15: 			fprintf(stderr, "invalid particle config: %s\n", opt.name);
nuclear@15: 			goto err;
nuclear@15: 		}
nuclear@15: 
nuclear@15: 		if(strcmp(opt.name, "spawn_range") == 0) {
nuclear@15: 			psys_set_value3(&attr->spawn_range, opt.tm, opt.val);
nuclear@15: 		} else if(strcmp(opt.name, "rate") == 0) {
nuclear@15: 			psys_set_value(&attr->rate, opt.tm, opt.val.x);
nuclear@15: 		} else if(strcmp(opt.name, "life") == 0) {
nuclear@15: 			psys_set_anm_rnd(&attr->life, opt.tm, opt.val.x, opt.valrng.x);
nuclear@15: 		} else if(strcmp(opt.name, "size") == 0) {
nuclear@15: 			psys_set_anm_rnd(&attr->size, opt.tm, opt.val.x, opt.valrng.x);
nuclear@15: 		} else if(strcmp(opt.name, "dir") == 0) {
nuclear@15: 			psys_set_anm_rnd3(&attr->dir, opt.tm, opt.val, opt.valrng);
nuclear@15: 		} else if(strcmp(opt.name, "grav") == 0) {
nuclear@15: 			psys_set_value3(&attr->grav, opt.tm, opt.val);
nuclear@15: 		} else if(strcmp(opt.name, "drag") == 0) {
nuclear@15: 			attr->drag = opt.val.x;
nuclear@15: 		} else if(strcmp(opt.name, "pcolor") == 0) {
nuclear@15: 			psys_set_value3(&attr->part_attr.color, opt.tm, opt.val);
nuclear@15: 		} else if(strcmp(opt.name, "palpha") == 0) {
nuclear@15: 			psys_set_value(&attr->part_attr.alpha, opt.tm, opt.val.x);
nuclear@15: 		} else if(strcmp(opt.name, "psize") == 0) {
nuclear@15: 			psys_set_value(&attr->part_attr.size, opt.tm, opt.val.x);
nuclear@15: 		} else {
nuclear@15: 			fprintf(stderr, "unrecognized particle config option: %s\n", opt.name);
nuclear@15: 			goto err;
nuclear@13: 		}
nuclear@14: 	}
nuclear@13: 
nuclear@15: 	return 0;
nuclear@15: 
nuclear@14: err:
nuclear@14: 	fprintf(stderr, "Line %d: error parsing particle definition\n", lineno);
nuclear@14: 	psys_destroy_attr(attr);
nuclear@14: 	return -1;
nuclear@14: }
nuclear@13: 
nuclear@14: /* strdup on the stack with alloca */
nuclear@15: #define strdup_stack(s)  strcpy(alloca(strlen(s) + 1), s)
nuclear@14: 
nuclear@14: static int get_cfg_opt(const char *line, struct cfgopt *opt)
nuclear@14: {
nuclear@14: 	char *buf;
nuclear@14: 	float tmsec;
nuclear@14: 
nuclear@15: 	line = stripspace((char*)line);
nuclear@14: 	if(line[0] == '#' || !line[0]) {
nuclear@14: 		return 0;	/* skip empty lines and comments */
nuclear@13: 	}
nuclear@14: 	if(!(opt->valstr = strchr(line, '='))) {
nuclear@14: 		return -1;
nuclear@14: 	}
nuclear@14: 	*opt->valstr++ = 0;
nuclear@14: 	opt->valstr = stripspace(opt->valstr);
nuclear@14: 
nuclear@14: 	/* allocate a working buffer on the stack that could fit the current line */
nuclear@14: 	buf = alloca(strlen(line) + 1);
nuclear@14: 
nuclear@14: 	if(sscanf(line, "%s(%fs)", buf, &tmsec) == 2) {
nuclear@14: 		opt->tm = (long)(tmsec * 1000.0f);
nuclear@14: 		opt->name = strdup_stack(buf);
nuclear@14: 	} else if(sscanf(line, "%s(%ld)", buf, &opt->tm) == 2) {
nuclear@14: 		opt->name = strdup_stack(buf);
nuclear@14: 	} else {
nuclear@14: 		opt->name = strdup_stack(buf);
nuclear@14: 		opt->tm = 0;
nuclear@14: 	}
nuclear@14: 
nuclear@14: 	if(sscanf(opt->valstr, "[%f %f %f] ~ [%f %f %f]", &opt->val.x, &opt->val.y, &opt->val.z,
nuclear@14: 				&opt->valrng.x, &opt->valrng.y, &opt->valrng.z) == 6) {
nuclear@14: 		/* value is a vector range */
nuclear@14: 		opt->type = OPT_VEC_RANGE;
nuclear@14: 
nuclear@14: 	} else if(sscanf(opt->valstr, "%f ~ %f", &opt->val.x, &opt->valrng.x) == 2) {
nuclear@14: 		/* value is a number range */
nuclear@14: 		opt->type = OPT_NUM_RANGE;
nuclear@14: 		opt->val.y = opt->val.z = opt->val.x;
nuclear@15: 		opt->valrng.y = opt->valrng.z = opt->valrng.x;
nuclear@14: 
nuclear@14: 	} else if(sscanf(opt->valstr, "[%f %f %f]", &opt->val.x, &opt->val.y, &opt->val.z) == 3) {
nuclear@14: 		/* value is a vector */
nuclear@14: 		opt->type = OPT_VEC;
nuclear@14: 		opt->valrng.x = opt->valrng.y = opt->valrng.z = 0.0f;
nuclear@14: 
nuclear@14: 	} else if(sscanf(opt->valstr, "%f", &opt->val.x) == 1) {
nuclear@14: 		/* value is a number */
nuclear@14: 		opt->type = OPT_NUM;
nuclear@14: 		opt->val.y = opt->val.z = opt->val.x;
nuclear@14: 		opt->valrng.x = opt->valrng.y = opt->valrng.z = 0.0f;
nuclear@14: 
nuclear@14: 	} else if(sscanf(opt->valstr, "\"%s\"", buf) == 1) {
nuclear@14: 		/* just a string... strip the quotes */
nuclear@14: 		opt->type = OPT_STR;
nuclear@14: 		opt->valstr = strdup_stack(buf);
nuclear@14: 	} else {
nuclear@14: 		/* fuck it ... */
nuclear@14: 		return -1;
nuclear@14: 	}
nuclear@14: 
nuclear@14: 	return 0;
nuclear@6: }
nuclear@6: 
nuclear@6: 
nuclear@14: 
nuclear@6: int psys_save_attr(struct psys_attributes *attr, const char *fname)
nuclear@6: {
nuclear@6: 	FILE *fp;
nuclear@6: 	int res;
nuclear@6: 
nuclear@6: 	if(!(fp = fopen(fname, "w"))) {
nuclear@6: 		fprintf(stderr, "%s: failed to write file: %s: %s\n", __func__, fname, strerror(errno));
nuclear@6: 		return -1;
nuclear@6: 	}
nuclear@6: 	res = psys_save_attr_stream(attr, fp);
nuclear@6: 	fclose(fp);
nuclear@6: 	return res;
nuclear@6: }
nuclear@6: 
nuclear@6: int psys_save_attr_stream(struct psys_attributes *attr, FILE *fp)
nuclear@6: {
nuclear@6: 	return -1;	/* TODO */
nuclear@6: }
nuclear@13: 
nuclear@13: 
nuclear@13: static char *stripspace(char *str)
nuclear@13: {
nuclear@13: 	char *end;
nuclear@13: 
nuclear@13: 	while(*str && isspace(*str)) {
nuclear@13: 		str++;
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	end = str + strlen(str);
nuclear@13: 	while(end >= str && isspace(*end)) {
nuclear@13: 		*end-- = 0;
nuclear@13: 	}
nuclear@13: 	return str;
nuclear@13: }