1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/prototype/psys/pattr.c	Sun Oct 07 02:04:00 2012 +0300
     1.3 @@ -0,0 +1,371 @@
     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 +#include "psys_gl.h"
    1.19 +
    1.20 +enum {
    1.21 +	OPT_STR,
    1.22 +	OPT_NUM,
    1.23 +	OPT_NUM_RANGE,
    1.24 +	OPT_VEC,
    1.25 +	OPT_VEC_RANGE
    1.26 +};
    1.27 +
    1.28 +struct cfgopt {
    1.29 +	char *name;
    1.30 +	int type;
    1.31 +	long tm;
    1.32 +	char *valstr;
    1.33 +	vec3_t val, valrng;
    1.34 +};
    1.35 +
    1.36 +static int init_particle_attr(struct psys_particle_attributes *pattr);
    1.37 +static void destroy_particle_attr(struct psys_particle_attributes *pattr);
    1.38 +static struct cfgopt *get_cfg_opt(const char *line);
    1.39 +static void release_cfg_opt(struct cfgopt *opt);
    1.40 +static char *stripspace(char *str);
    1.41 +
    1.42 +static void *tex_cls;
    1.43 +static unsigned int (*load_texture)(const char*, void*) = psys_gl_load_texture;
    1.44 +static void (*unload_texture)(unsigned int, void*) = psys_gl_unload_texture;
    1.45 +
    1.46 +
    1.47 +void psys_texture_loader(unsigned int (*load)(const char*, void*), void (*unload)(unsigned int, void*), void *cls)
    1.48 +{
    1.49 +	load_texture = load;
    1.50 +	unload_texture = unload;
    1.51 +	tex_cls = cls;
    1.52 +}
    1.53 +
    1.54 +struct psys_attributes *psys_create_attr(void)
    1.55 +{
    1.56 +	struct psys_attributes *attr = malloc(sizeof *attr);
    1.57 +	if(attr) {
    1.58 +		if(psys_init_attr(attr) == -1) {
    1.59 +			free(attr);
    1.60 +			attr = 0;
    1.61 +		}
    1.62 +	}
    1.63 +	return attr;
    1.64 +}
    1.65 +
    1.66 +void psys_free_attr(struct psys_attributes *attr)
    1.67 +{
    1.68 +	psys_destroy_attr(attr);
    1.69 +	free(attr);
    1.70 +}
    1.71 +
    1.72 +int psys_init_attr(struct psys_attributes *attr)
    1.73 +{
    1.74 +	memset(attr, 0, sizeof *attr);
    1.75 +
    1.76 +	if(psys_init_track3(&attr->spawn_range) == -1)
    1.77 +		goto err;
    1.78 +	if(psys_init_track(&attr->rate) == -1)
    1.79 +		goto err;
    1.80 +	if(psys_init_anm_rnd(&attr->life) == -1)
    1.81 +		goto err;
    1.82 +	if(psys_init_anm_rnd(&attr->size) == -1)
    1.83 +		goto err;
    1.84 +	if(psys_init_anm_rnd3(&attr->dir) == -1)
    1.85 +		goto err;
    1.86 +	if(psys_init_track3(&attr->grav) == -1)
    1.87 +		goto err;
    1.88 +
    1.89 +	if(init_particle_attr(&attr->part_attr) == -1)
    1.90 +		goto err;
    1.91 +
    1.92 +	attr->max_particles = -1;
    1.93 +
    1.94 +	anm_set_track_default(&attr->size.value.trk, 1.0);
    1.95 +	anm_set_track_default(&attr->life.value.trk, 1.0);
    1.96 +
    1.97 +	return 0;
    1.98 +
    1.99 +err:
   1.100 +	psys_destroy_attr(attr);
   1.101 +	return -1;
   1.102 +}
   1.103 +
   1.104 +
   1.105 +static int init_particle_attr(struct psys_particle_attributes *pattr)
   1.106 +{
   1.107 +	if(psys_init_track3(&pattr->color) == -1) {
   1.108 +		return -1;
   1.109 +	}
   1.110 +	if(psys_init_track(&pattr->alpha) == -1) {
   1.111 +		psys_destroy_track3(&pattr->color);
   1.112 +		return -1;
   1.113 +	}
   1.114 +	if(psys_init_track(&pattr->size) == -1) {
   1.115 +		psys_destroy_track3(&pattr->color);
   1.116 +		psys_destroy_track(&pattr->alpha);
   1.117 +		return -1;
   1.118 +	}
   1.119 +
   1.120 +	anm_set_track_default(&pattr->color.x, 1.0);
   1.121 +	anm_set_track_default(&pattr->color.y, 1.0);
   1.122 +	anm_set_track_default(&pattr->color.z, 1.0);
   1.123 +	anm_set_track_default(&pattr->alpha.trk, 1.0);
   1.124 +	anm_set_track_default(&pattr->size.trk, 1.0);
   1.125 +	return 0;
   1.126 +}
   1.127 +
   1.128 +
   1.129 +void psys_destroy_attr(struct psys_attributes *attr)
   1.130 +{
   1.131 +	psys_destroy_track3(&attr->spawn_range);
   1.132 +	psys_destroy_track(&attr->rate);
   1.133 +	psys_destroy_anm_rnd(&attr->life);
   1.134 +	psys_destroy_anm_rnd(&attr->size);
   1.135 +	psys_destroy_anm_rnd3(&attr->dir);
   1.136 +	psys_destroy_track3(&attr->grav);
   1.137 +
   1.138 +	destroy_particle_attr(&attr->part_attr);
   1.139 +
   1.140 +	if(attr->tex && unload_texture) {
   1.141 +		unload_texture(attr->tex, tex_cls);
   1.142 +	}
   1.143 +}
   1.144 +
   1.145 +static void destroy_particle_attr(struct psys_particle_attributes *pattr)
   1.146 +{
   1.147 +	psys_destroy_track3(&pattr->color);
   1.148 +	psys_destroy_track(&pattr->alpha);
   1.149 +	psys_destroy_track(&pattr->size);
   1.150 +}
   1.151 +
   1.152 +void psys_eval_attr(struct psys_attributes *attr, anm_time_t tm)
   1.153 +{
   1.154 +	psys_eval_track3(&attr->spawn_range, tm);
   1.155 +	psys_eval_track(&attr->rate, tm);
   1.156 +	psys_eval_anm_rnd(&attr->life, tm);
   1.157 +	psys_eval_anm_rnd(&attr->size, tm);
   1.158 +	psys_eval_anm_rnd3(&attr->dir, tm);
   1.159 +	psys_eval_track3(&attr->grav, tm);
   1.160 +}
   1.161 +
   1.162 +int psys_load_attr(struct psys_attributes *attr, const char *fname)
   1.163 +{
   1.164 +	FILE *fp;
   1.165 +	int res;
   1.166 +
   1.167 +	if(!fname) {
   1.168 +		return -1;
   1.169 +	}
   1.170 +
   1.171 +	if(!(fp = fopen(fname, "r"))) {
   1.172 +		fprintf(stderr, "%s: failed to read file: %s: %s\n", __func__, fname, strerror(errno));
   1.173 +		return -1;
   1.174 +	}
   1.175 +	res = psys_load_attr_stream(attr, fp);
   1.176 +	fclose(fp);
   1.177 +	return res;
   1.178 +}
   1.179 +
   1.180 +int psys_load_attr_stream(struct psys_attributes *attr, FILE *fp)
   1.181 +{
   1.182 +	int lineno = 0;
   1.183 +	char buf[512];
   1.184 +	struct cfgopt *opt = 0;
   1.185 +
   1.186 +	psys_init_attr(attr);
   1.187 +
   1.188 +	while(fgets(buf, sizeof buf, fp)) {
   1.189 +
   1.190 +		lineno++;
   1.191 +
   1.192 +		if(!(opt = get_cfg_opt(buf))) {
   1.193 +			continue;
   1.194 +		}
   1.195 +
   1.196 +		if(strcmp(opt->name, "texture") == 0) {
   1.197 +			if(opt->type != OPT_STR) {
   1.198 +				goto err;
   1.199 +			}
   1.200 +			if(!(attr->tex = load_texture(opt->valstr, tex_cls))) {
   1.201 +				fprintf(stderr, "failed to load texture: %s\n", opt->valstr);
   1.202 +				goto err;
   1.203 +			}
   1.204 +
   1.205 +			release_cfg_opt(opt);
   1.206 +			continue;
   1.207 +		} else if(opt->type == OPT_STR) {
   1.208 +			fprintf(stderr, "invalid particle config: '%s'\n", opt->name);
   1.209 +			goto err;
   1.210 +		}
   1.211 +
   1.212 +		if(strcmp(opt->name, "spawn_range") == 0) {
   1.213 +			psys_set_value3(&attr->spawn_range, opt->tm, opt->val);
   1.214 +		} else if(strcmp(opt->name, "rate") == 0) {
   1.215 +			psys_set_value(&attr->rate, opt->tm, opt->val.x);
   1.216 +		} else if(strcmp(opt->name, "life") == 0) {
   1.217 +			psys_set_anm_rnd(&attr->life, opt->tm, opt->val.x, opt->valrng.x);
   1.218 +		} else if(strcmp(opt->name, "size") == 0) {
   1.219 +			psys_set_anm_rnd(&attr->size, opt->tm, opt->val.x, opt->valrng.x);
   1.220 +		} else if(strcmp(opt->name, "dir") == 0) {
   1.221 +			psys_set_anm_rnd3(&attr->dir, opt->tm, opt->val, opt->valrng);
   1.222 +		} else if(strcmp(opt->name, "grav") == 0) {
   1.223 +			psys_set_value3(&attr->grav, opt->tm, opt->val);
   1.224 +		} else if(strcmp(opt->name, "drag") == 0) {
   1.225 +			attr->drag = opt->val.x;
   1.226 +		} else if(strcmp(opt->name, "pcolor") == 0) {
   1.227 +			psys_set_value3(&attr->part_attr.color, opt->tm, opt->val);
   1.228 +		} else if(strcmp(opt->name, "palpha") == 0) {
   1.229 +			psys_set_value(&attr->part_attr.alpha, opt->tm, opt->val.x);
   1.230 +		} else if(strcmp(opt->name, "psize") == 0) {
   1.231 +			psys_set_value(&attr->part_attr.size, opt->tm, opt->val.x);
   1.232 +		} else {
   1.233 +			fprintf(stderr, "unrecognized particle config option: %s\n", opt->name);
   1.234 +			goto err;
   1.235 +		}
   1.236 +
   1.237 +		release_cfg_opt(opt);
   1.238 +	}
   1.239 +
   1.240 +	return 0;
   1.241 +
   1.242 +err:
   1.243 +	fprintf(stderr, "Line %d: error parsing particle definition\n", lineno);
   1.244 +	release_cfg_opt(opt);
   1.245 +	return -1;
   1.246 +}
   1.247 +
   1.248 +static struct cfgopt *get_cfg_opt(const char *line)
   1.249 +{
   1.250 +	char *buf, *tmp;
   1.251 +	struct cfgopt *opt;
   1.252 +
   1.253 +	line = stripspace((char*)line);
   1.254 +	if(line[0] == '#' || !line[0]) {
   1.255 +		return 0;	/* skip empty lines and comments */
   1.256 +	}
   1.257 +
   1.258 +	if(!(opt = malloc(sizeof *opt))) {
   1.259 +		return 0;
   1.260 +	}
   1.261 +
   1.262 +	if(!(opt->valstr = strchr(line, '='))) {
   1.263 +		release_cfg_opt(opt);
   1.264 +		return 0;
   1.265 +	}
   1.266 +	*opt->valstr++ = 0;
   1.267 +	opt->valstr = stripspace(opt->valstr);
   1.268 +
   1.269 +	/* allocate a working buffer on the stack that could fit the current line */
   1.270 +	buf = alloca(strlen(line) + 1);
   1.271 +	strcpy(buf, line);
   1.272 +	buf = stripspace(buf);
   1.273 +
   1.274 +	/* parse the keyframe time specifier if it exists */
   1.275 +	if((tmp = strchr(buf, '('))) {
   1.276 +		char *endp;
   1.277 +		float tval;
   1.278 +
   1.279 +		*tmp++ = 0;
   1.280 +		opt->name = strdup(buf);
   1.281 +
   1.282 +		tval = strtod(tmp, &endp);
   1.283 +		if(endp == tmp) { /* nada ... */
   1.284 +			opt->tm = 0;
   1.285 +		} else if(*endp == 's') {	/* seconds suffix */
   1.286 +			opt->tm = (long)(tval * 1000.0f);
   1.287 +		} else {
   1.288 +			opt->tm = (long)tval;
   1.289 +		}
   1.290 +	} else {
   1.291 +		opt->name = strdup(buf);
   1.292 +		opt->tm = 0;
   1.293 +	}
   1.294 +
   1.295 +	if(sscanf(opt->valstr, "[%f %f %f] ~ [%f %f %f]", &opt->val.x, &opt->val.y, &opt->val.z,
   1.296 +				&opt->valrng.x, &opt->valrng.y, &opt->valrng.z) == 6) {
   1.297 +		/* value is a vector range */
   1.298 +		opt->type = OPT_VEC_RANGE;
   1.299 +
   1.300 +	} else if(sscanf(opt->valstr, "%f ~ %f", &opt->val.x, &opt->valrng.x) == 2) {
   1.301 +		/* value is a number range */
   1.302 +		opt->type = OPT_NUM_RANGE;
   1.303 +		opt->val.y = opt->val.z = opt->val.x;
   1.304 +		opt->valrng.y = opt->valrng.z = opt->valrng.x;
   1.305 +
   1.306 +	} else if(sscanf(opt->valstr, "[%f %f %f]", &opt->val.x, &opt->val.y, &opt->val.z) == 3) {
   1.307 +		/* value is a vector */
   1.308 +		opt->type = OPT_VEC;
   1.309 +		opt->valrng.x = opt->valrng.y = opt->valrng.z = 0.0f;
   1.310 +
   1.311 +	} else if(sscanf(opt->valstr, "%f", &opt->val.x) == 1) {
   1.312 +		/* value is a number */
   1.313 +		opt->type = OPT_NUM;
   1.314 +		opt->val.y = opt->val.z = opt->val.x;
   1.315 +		opt->valrng.x = opt->valrng.y = opt->valrng.z = 0.0f;
   1.316 +
   1.317 +	} else if(sscanf(opt->valstr, "\"%s\"", buf) == 1) {
   1.318 +		/* just a string... strip the quotes */
   1.319 +		if(buf[strlen(buf) - 1] == '\"') {
   1.320 +			buf[strlen(buf) - 1] = 0;
   1.321 +		}
   1.322 +		opt->type = OPT_STR;
   1.323 +		opt->valstr = strdup(buf);
   1.324 +	} else {
   1.325 +		/* fuck it ... */
   1.326 +		release_cfg_opt(opt);
   1.327 +		return 0;
   1.328 +	}
   1.329 +
   1.330 +	return opt;
   1.331 +}
   1.332 +
   1.333 +static void release_cfg_opt(struct cfgopt *opt)
   1.334 +{
   1.335 +	if(opt) {
   1.336 +		free(opt->name);
   1.337 +	}
   1.338 +}
   1.339 +
   1.340 +
   1.341 +int psys_save_attr(struct psys_attributes *attr, const char *fname)
   1.342 +{
   1.343 +	FILE *fp;
   1.344 +	int res;
   1.345 +
   1.346 +	if(!(fp = fopen(fname, "w"))) {
   1.347 +		fprintf(stderr, "%s: failed to write file: %s: %s\n", __func__, fname, strerror(errno));
   1.348 +		return -1;
   1.349 +	}
   1.350 +	res = psys_save_attr_stream(attr, fp);
   1.351 +	fclose(fp);
   1.352 +	return res;
   1.353 +}
   1.354 +
   1.355 +int psys_save_attr_stream(struct psys_attributes *attr, FILE *fp)
   1.356 +{
   1.357 +	return -1;	/* TODO */
   1.358 +}
   1.359 +
   1.360 +
   1.361 +static char *stripspace(char *str)
   1.362 +{
   1.363 +	char *end;
   1.364 +
   1.365 +	while(*str && isspace(*str)) {
   1.366 +		str++;
   1.367 +	}
   1.368 +
   1.369 +	end = str + strlen(str) - 1;
   1.370 +	while(end >= str && isspace(*end)) {
   1.371 +		*end-- = 0;
   1.372 +	}
   1.373 +	return str;
   1.374 +}