1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/psys/pattr.c	Sat Feb 01 19:58:19 2014 +0200
     1.3 @@ -0,0 +1,401 @@
     1.4 +#define _GNU_SOURCE
     1.5 +#include <stdio.h>
     1.6 +#include <stdlib.h>
     1.7 +#include <string.h>
     1.8 +#include <errno.h>
     1.9 +#include <ctype.h>
    1.10 +
    1.11 +#ifdef _MSC_VER
    1.12 +#include <malloc.h>
    1.13 +#else
    1.14 +#include <alloca.h>
    1.15 +#endif
    1.16 +
    1.17 +#include "pattr.h"
    1.18 +
    1.19 +enum {
    1.20 +	OPT_STR,
    1.21 +	OPT_NUM,
    1.22 +	OPT_NUM_RANGE,
    1.23 +	OPT_VEC,
    1.24 +	OPT_VEC_RANGE
    1.25 +};
    1.26 +
    1.27 +struct cfgopt {
    1.28 +	char *name;
    1.29 +	int type;
    1.30 +	long tm;
    1.31 +	char *valstr;
    1.32 +	vec3_t val, valrng;
    1.33 +};
    1.34 +
    1.35 +static int init_particle_attr(struct psys_particle_attributes *pattr);
    1.36 +static void destroy_particle_attr(struct psys_particle_attributes *pattr);
    1.37 +static struct cfgopt *get_cfg_opt(const char *line);
    1.38 +static void release_cfg_opt(struct cfgopt *opt);
    1.39 +static char *stripspace(char *str);
    1.40 +
    1.41 +static void *tex_cls;
    1.42 +static unsigned int (*load_texture)(const char*, void*);
    1.43 +static void (*unload_texture)(unsigned int, void*);
    1.44 +
    1.45 +
    1.46 +void psys_texture_loader(unsigned int (*load)(const char*, void*), void (*unload)(unsigned int, void*), void *cls)
    1.47 +{
    1.48 +	load_texture = load;
    1.49 +	unload_texture = unload;
    1.50 +	tex_cls = cls;
    1.51 +}
    1.52 +
    1.53 +struct psys_attributes *psys_create_attr(void)
    1.54 +{
    1.55 +	struct psys_attributes *attr = malloc(sizeof *attr);
    1.56 +	if(attr) {
    1.57 +		if(psys_init_attr(attr) == -1) {
    1.58 +			free(attr);
    1.59 +			attr = 0;
    1.60 +		}
    1.61 +	}
    1.62 +	return attr;
    1.63 +}
    1.64 +
    1.65 +void psys_free_attr(struct psys_attributes *attr)
    1.66 +{
    1.67 +	psys_destroy_attr(attr);
    1.68 +	free(attr);
    1.69 +}
    1.70 +
    1.71 +int psys_init_attr(struct psys_attributes *attr)
    1.72 +{
    1.73 +	memset(attr, 0, sizeof *attr);
    1.74 +
    1.75 +	if(psys_init_track3(&attr->spawn_range) == -1)
    1.76 +		goto err;
    1.77 +	if(psys_init_track(&attr->rate) == -1)
    1.78 +		goto err;
    1.79 +	if(psys_init_anm_rnd(&attr->life) == -1)
    1.80 +		goto err;
    1.81 +	if(psys_init_anm_rnd(&attr->size) == -1)
    1.82 +		goto err;
    1.83 +	if(psys_init_anm_rnd3(&attr->dir) == -1)
    1.84 +		goto err;
    1.85 +	if(psys_init_track3(&attr->grav) == -1)
    1.86 +		goto err;
    1.87 +
    1.88 +	if(init_particle_attr(&attr->part_attr) == -1)
    1.89 +		goto err;
    1.90 +
    1.91 +	attr->max_particles = -1;
    1.92 +
    1.93 +	anm_set_track_default(&attr->size.value.trk, 1.0);
    1.94 +	anm_set_track_default(&attr->life.value.trk, 1.0);
    1.95 +
    1.96 +	return 0;
    1.97 +
    1.98 +err:
    1.99 +	psys_destroy_attr(attr);
   1.100 +	return -1;
   1.101 +}
   1.102 +
   1.103 +
   1.104 +static int init_particle_attr(struct psys_particle_attributes *pattr)
   1.105 +{
   1.106 +	if(psys_init_track3(&pattr->color) == -1) {
   1.107 +		return -1;
   1.108 +	}
   1.109 +	if(psys_init_track(&pattr->alpha) == -1) {
   1.110 +		psys_destroy_track3(&pattr->color);
   1.111 +		return -1;
   1.112 +	}
   1.113 +	if(psys_init_track(&pattr->size) == -1) {
   1.114 +		psys_destroy_track3(&pattr->color);
   1.115 +		psys_destroy_track(&pattr->alpha);
   1.116 +		return -1;
   1.117 +	}
   1.118 +
   1.119 +	anm_set_track_default(&pattr->color.x, 1.0);
   1.120 +	anm_set_track_default(&pattr->color.y, 1.0);
   1.121 +	anm_set_track_default(&pattr->color.z, 1.0);
   1.122 +	anm_set_track_default(&pattr->alpha.trk, 1.0);
   1.123 +	anm_set_track_default(&pattr->size.trk, 1.0);
   1.124 +	return 0;
   1.125 +}
   1.126 +
   1.127 +
   1.128 +void psys_destroy_attr(struct psys_attributes *attr)
   1.129 +{
   1.130 +	psys_destroy_track3(&attr->spawn_range);
   1.131 +	psys_destroy_track(&attr->rate);
   1.132 +	psys_destroy_anm_rnd(&attr->life);
   1.133 +	psys_destroy_anm_rnd(&attr->size);
   1.134 +	psys_destroy_anm_rnd3(&attr->dir);
   1.135 +	psys_destroy_track3(&attr->grav);
   1.136 +
   1.137 +	destroy_particle_attr(&attr->part_attr);
   1.138 +
   1.139 +	if(attr->tex && unload_texture) {
   1.140 +		unload_texture(attr->tex, tex_cls);
   1.141 +	}
   1.142 +}
   1.143 +
   1.144 +static void destroy_particle_attr(struct psys_particle_attributes *pattr)
   1.145 +{
   1.146 +	psys_destroy_track3(&pattr->color);
   1.147 +	psys_destroy_track(&pattr->alpha);
   1.148 +	psys_destroy_track(&pattr->size);
   1.149 +}
   1.150 +
   1.151 +void psys_copy_attr(struct psys_attributes *dest, const struct psys_attributes *src)
   1.152 +{
   1.153 +	dest->tex = src->tex;
   1.154 +
   1.155 +	psys_copy_track3(&dest->spawn_range, &src->spawn_range);
   1.156 +	psys_copy_track(&dest->rate, &src->rate);
   1.157 +
   1.158 +	psys_copy_anm_rnd(&dest->life, &src->life);
   1.159 +	psys_copy_anm_rnd(&dest->size, &src->size);
   1.160 +	psys_copy_anm_rnd3(&dest->dir, &src->dir);
   1.161 +
   1.162 +	psys_copy_track3(&dest->grav, &src->grav);
   1.163 +
   1.164 +	dest->drag = src->drag;
   1.165 +	dest->max_particles = src->max_particles;
   1.166 +
   1.167 +	/* also copy the particle attributes */
   1.168 +	psys_copy_track3(&dest->part_attr.color, &src->part_attr.color);
   1.169 +	psys_copy_track(&dest->part_attr.alpha, &src->part_attr.alpha);
   1.170 +	psys_copy_track(&dest->part_attr.size, &src->part_attr.size);
   1.171 +}
   1.172 +
   1.173 +void psys_eval_attr(struct psys_attributes *attr, anm_time_t tm)
   1.174 +{
   1.175 +	psys_eval_track3(&attr->spawn_range, tm);
   1.176 +	psys_eval_track(&attr->rate, tm);
   1.177 +	psys_eval_anm_rnd(&attr->life, tm);
   1.178 +	psys_eval_anm_rnd(&attr->size, tm);
   1.179 +	psys_eval_anm_rnd3(&attr->dir, tm);
   1.180 +	psys_eval_track3(&attr->grav, tm);
   1.181 +}
   1.182 +
   1.183 +int psys_load_attr(struct psys_attributes *attr, const char *fname)
   1.184 +{
   1.185 +	FILE *fp;
   1.186 +	int res;
   1.187 +
   1.188 +	if(!fname) {
   1.189 +		return -1;
   1.190 +	}
   1.191 +
   1.192 +	if(!(fp = fopen(fname, "r"))) {
   1.193 +		fprintf(stderr, "%s: failed to read file: %s: %s\n", __FUNCTION__, fname, strerror(errno));
   1.194 +		return -1;
   1.195 +	}
   1.196 +	res = psys_load_attr_stream(attr, fp);
   1.197 +	fclose(fp);
   1.198 +	return res;
   1.199 +}
   1.200 +
   1.201 +int psys_load_attr_stream(struct psys_attributes *attr, FILE *fp)
   1.202 +{
   1.203 +	int lineno = 0;
   1.204 +	char buf[512];
   1.205 +	struct cfgopt *opt = 0;
   1.206 +
   1.207 +	psys_init_attr(attr);
   1.208 +
   1.209 +	while(fgets(buf, sizeof buf, fp)) {
   1.210 +
   1.211 +		lineno++;
   1.212 +
   1.213 +		if(!(opt = get_cfg_opt(buf))) {
   1.214 +			continue;
   1.215 +		}
   1.216 +
   1.217 +		if(strcmp(opt->name, "texture") == 0) {
   1.218 +			if(opt->type != OPT_STR) {
   1.219 +				goto err;
   1.220 +			}
   1.221 +			if(!load_texture) {
   1.222 +				fprintf(stderr, "particle system requests a texture, but no texture loader available!\n");
   1.223 +				goto err;
   1.224 +			}
   1.225 +			if(!(attr->tex = load_texture(opt->valstr, tex_cls))) {
   1.226 +				fprintf(stderr, "failed to load texture: %s\n", opt->valstr);
   1.227 +				goto err;
   1.228 +			}
   1.229 +
   1.230 +			release_cfg_opt(opt);
   1.231 +			continue;
   1.232 +		} else if(opt->type == OPT_STR) {
   1.233 +			fprintf(stderr, "invalid particle config: '%s'\n", opt->name);
   1.234 +			goto err;
   1.235 +		}
   1.236 +
   1.237 +		if(strcmp(opt->name, "spawn_range") == 0) {
   1.238 +			psys_set_value3(&attr->spawn_range, opt->tm, opt->val);
   1.239 +		} else if(strcmp(opt->name, "rate") == 0) {
   1.240 +			psys_set_value(&attr->rate, opt->tm, opt->val.x);
   1.241 +		} else if(strcmp(opt->name, "life") == 0) {
   1.242 +			psys_set_anm_rnd(&attr->life, opt->tm, opt->val.x, opt->valrng.x);
   1.243 +		} else if(strcmp(opt->name, "size") == 0) {
   1.244 +			psys_set_anm_rnd(&attr->size, opt->tm, opt->val.x, opt->valrng.x);
   1.245 +		} else if(strcmp(opt->name, "dir") == 0) {
   1.246 +			psys_set_anm_rnd3(&attr->dir, opt->tm, opt->val, opt->valrng);
   1.247 +		} else if(strcmp(opt->name, "grav") == 0) {
   1.248 +			psys_set_value3(&attr->grav, opt->tm, opt->val);
   1.249 +		} else if(strcmp(opt->name, "drag") == 0) {
   1.250 +			attr->drag = opt->val.x;
   1.251 +		} else if(strcmp(opt->name, "pcolor") == 0) {
   1.252 +			psys_set_value3(&attr->part_attr.color, opt->tm, opt->val);
   1.253 +		} else if(strcmp(opt->name, "palpha") == 0) {
   1.254 +			psys_set_value(&attr->part_attr.alpha, opt->tm, opt->val.x);
   1.255 +		} else if(strcmp(opt->name, "psize") == 0) {
   1.256 +			psys_set_value(&attr->part_attr.size, opt->tm, opt->val.x);
   1.257 +		} else {
   1.258 +			fprintf(stderr, "unrecognized particle config option: %s\n", opt->name);
   1.259 +			goto err;
   1.260 +		}
   1.261 +
   1.262 +		release_cfg_opt(opt);
   1.263 +	}
   1.264 +
   1.265 +	return 0;
   1.266 +
   1.267 +err:
   1.268 +	fprintf(stderr, "Line %d: error parsing particle definition\n", lineno);
   1.269 +	release_cfg_opt(opt);
   1.270 +	return -1;
   1.271 +}
   1.272 +
   1.273 +static struct cfgopt *get_cfg_opt(const char *line)
   1.274 +{
   1.275 +	char *buf, *tmp;
   1.276 +	struct cfgopt *opt;
   1.277 +
   1.278 +	/* allocate a working buffer on the stack that could fit the current line */
   1.279 +	buf = alloca(strlen(line) + 1);
   1.280 +
   1.281 +	line = stripspace((char*)line);
   1.282 +	if(line[0] == '#' || !line[0]) {
   1.283 +		return 0;	/* skip empty lines and comments */
   1.284 +	}
   1.285 +
   1.286 +	if(!(opt = malloc(sizeof *opt))) {
   1.287 +		return 0;
   1.288 +	}
   1.289 +
   1.290 +	if(!(opt->valstr = strchr(line, '='))) {
   1.291 +		release_cfg_opt(opt);
   1.292 +		return 0;
   1.293 +	}
   1.294 +	*opt->valstr++ = 0;
   1.295 +	opt->valstr = stripspace(opt->valstr);
   1.296 +
   1.297 +	strcpy(buf, line);
   1.298 +	buf = stripspace(buf);
   1.299 +
   1.300 +	/* parse the keyframe time specifier if it exists */
   1.301 +	if((tmp = strchr(buf, '('))) {
   1.302 +		char *endp;
   1.303 +		float tval;
   1.304 +
   1.305 +		*tmp++ = 0;
   1.306 +		opt->name = malloc(strlen(buf) + 1);
   1.307 +		strcpy(opt->name, buf);
   1.308 +
   1.309 +		tval = strtod(tmp, &endp);
   1.310 +		if(endp == tmp) { /* nada ... */
   1.311 +			opt->tm = 0;
   1.312 +		} else if(*endp == 's') {	/* seconds suffix */
   1.313 +			opt->tm = (long)(tval * 1000.0f);
   1.314 +		} else {
   1.315 +			opt->tm = (long)tval;
   1.316 +		}
   1.317 +	} else {
   1.318 +		opt->name = malloc(strlen(buf) + 1);
   1.319 +		strcpy(opt->name, buf);
   1.320 +		opt->tm = 0;
   1.321 +	}
   1.322 +
   1.323 +	if(sscanf(opt->valstr, "[%f %f %f] ~ [%f %f %f]", &opt->val.x, &opt->val.y, &opt->val.z,
   1.324 +				&opt->valrng.x, &opt->valrng.y, &opt->valrng.z) == 6) {
   1.325 +		/* value is a vector range */
   1.326 +		opt->type = OPT_VEC_RANGE;
   1.327 +
   1.328 +	} else if(sscanf(opt->valstr, "%f ~ %f", &opt->val.x, &opt->valrng.x) == 2) {
   1.329 +		/* value is a number range */
   1.330 +		opt->type = OPT_NUM_RANGE;
   1.331 +		opt->val.y = opt->val.z = opt->val.x;
   1.332 +		opt->valrng.y = opt->valrng.z = opt->valrng.x;
   1.333 +
   1.334 +	} else if(sscanf(opt->valstr, "[%f %f %f]", &opt->val.x, &opt->val.y, &opt->val.z) == 3) {
   1.335 +		/* value is a vector */
   1.336 +		opt->type = OPT_VEC;
   1.337 +		opt->valrng.x = opt->valrng.y = opt->valrng.z = 0.0f;
   1.338 +
   1.339 +	} else if(sscanf(opt->valstr, "%f", &opt->val.x) == 1) {
   1.340 +		/* value is a number */
   1.341 +		opt->type = OPT_NUM;
   1.342 +		opt->val.y = opt->val.z = opt->val.x;
   1.343 +		opt->valrng.x = opt->valrng.y = opt->valrng.z = 0.0f;
   1.344 +
   1.345 +	} else if(sscanf(opt->valstr, "\"%s\"", buf) == 1) {
   1.346 +		/* just a string... strip the quotes */
   1.347 +		if(buf[strlen(buf) - 1] == '\"') {
   1.348 +			buf[strlen(buf) - 1] = 0;
   1.349 +		}
   1.350 +		opt->type = OPT_STR;
   1.351 +		opt->valstr = strdup(buf);
   1.352 +	} else {
   1.353 +		/* fuck it ... */
   1.354 +		release_cfg_opt(opt);
   1.355 +		return 0;
   1.356 +	}
   1.357 +
   1.358 +	return opt;
   1.359 +}
   1.360 +
   1.361 +static void release_cfg_opt(struct cfgopt *opt)
   1.362 +{
   1.363 +	if(opt) {
   1.364 +		free(opt->name);
   1.365 +		opt->name = 0;
   1.366 +	}
   1.367 +	opt = 0;
   1.368 +}
   1.369 +
   1.370 +
   1.371 +int psys_save_attr(const struct psys_attributes *attr, const char *fname)
   1.372 +{
   1.373 +	FILE *fp;
   1.374 +	int res;
   1.375 +
   1.376 +	if(!(fp = fopen(fname, "w"))) {
   1.377 +		fprintf(stderr, "%s: failed to write file: %s: %s\n", __FUNCTION__, fname, strerror(errno));
   1.378 +		return -1;
   1.379 +	}
   1.380 +	res = psys_save_attr_stream(attr, fp);
   1.381 +	fclose(fp);
   1.382 +	return res;
   1.383 +}
   1.384 +
   1.385 +int psys_save_attr_stream(const struct psys_attributes *attr, FILE *fp)
   1.386 +{
   1.387 +	return -1;	/* TODO */
   1.388 +}
   1.389 +
   1.390 +
   1.391 +static char *stripspace(char *str)
   1.392 +{
   1.393 +	char *end;
   1.394 +
   1.395 +	while(*str && isspace(*str)) {
   1.396 +		str++;
   1.397 +	}
   1.398 +
   1.399 +	end = str + strlen(str) - 1;
   1.400 +	while(end >= str && isspace(*end)) {
   1.401 +		*end-- = 0;
   1.402 +	}
   1.403 +	return str;
   1.404 +}