| 1 |
#ifndef lint
|
| 2 |
static const char RCSid[] = "$Id: rfluxmtx.c,v 2.66 2025/10/23 23:34:00 greg Exp $";
|
| 3 |
#endif
|
| 4 |
/*
|
| 5 |
* Calculate flux transfer matrix or matrices using rcontrib
|
| 6 |
*/
|
| 7 |
|
| 8 |
#include "copyright.h"
|
| 9 |
|
| 10 |
#include <ctype.h>
|
| 11 |
#include <stdlib.h>
|
| 12 |
#include "rtio.h"
|
| 13 |
#include "rtmath.h"
|
| 14 |
#include "rtprocess.h"
|
| 15 |
#include "bsdf.h"
|
| 16 |
#include "bsdf_m.h"
|
| 17 |
#include "random.h"
|
| 18 |
#include "triangulate.h"
|
| 19 |
#include "platform.h"
|
| 20 |
|
| 21 |
#ifndef MAXRCARG
|
| 22 |
#define MAXRCARG 10000
|
| 23 |
#endif
|
| 24 |
|
| 25 |
#define NOWARN 1
|
| 26 |
#define VERBO 2
|
| 27 |
|
| 28 |
int verbose = 0; /* verbose/warning mode */
|
| 29 |
|
| 30 |
char *rcarg[MAXRCARG+1] = {"rcontrib", "-fo+"};
|
| 31 |
int nrcargs = 2;
|
| 32 |
|
| 33 |
const char overflowerr[] = "%s: too many arguments!\n";
|
| 34 |
|
| 35 |
#define CHECKARGC(n) if (nrcargs >= MAXRCARG-(n)) \
|
| 36 |
{ fprintf(stderr, overflowerr, progname); exit(1); }
|
| 37 |
|
| 38 |
int sampcnt = 0; /* sample count (0==unset) */
|
| 39 |
|
| 40 |
char *reinhfn = "reinhartb.cal";
|
| 41 |
char *shirchiufn = "disk2square.cal";
|
| 42 |
char *kfullfn = "klems_full.cal";
|
| 43 |
char *khalffn = "klems_half.cal";
|
| 44 |
char *kquarterfn = "klems_quarter.cal";
|
| 45 |
char *ciefn = "cieskyscan.cal";
|
| 46 |
|
| 47 |
char *binjitter = NULL;
|
| 48 |
/* string indicating parameters */
|
| 49 |
#define PARAMSTART "@rfluxmtx"
|
| 50 |
|
| 51 |
/* surface type IDs */
|
| 52 |
#define ST_NONE 0
|
| 53 |
#define ST_POLY 1
|
| 54 |
#define ST_RING 2
|
| 55 |
#define ST_SOURCE 3
|
| 56 |
|
| 57 |
typedef struct surf_s {
|
| 58 |
struct surf_s *next; /* next surface in list */
|
| 59 |
void *priv; /* private data (malloc'ed) */
|
| 60 |
char sname[32]; /* surface name */
|
| 61 |
FVECT snrm; /* surface normal */
|
| 62 |
double area; /* surface area / proj. solid angle */
|
| 63 |
short styp; /* surface type */
|
| 64 |
short nfargs; /* number of real arguments */
|
| 65 |
double farg[1]; /* real values (extends struct) */
|
| 66 |
} SURF; /* surface structure */
|
| 67 |
|
| 68 |
typedef struct {
|
| 69 |
FVECT uva[2]; /* tangent axes */
|
| 70 |
int ntris; /* number of triangles */
|
| 71 |
struct ptri {
|
| 72 |
double afrac; /* fraction of total area */
|
| 73 |
short vndx[3]; /* vertex indices */
|
| 74 |
} tri[1]; /* triangle array (extends struct) */
|
| 75 |
} POLYTRIS; /* triangulated polygon */
|
| 76 |
|
| 77 |
typedef struct param_s {
|
| 78 |
char sign; /* '-' for axis reversal */
|
| 79 |
char hemis[31]; /* hemispherical sampling spec. */
|
| 80 |
int hsiz; /* hemisphere basis size */
|
| 81 |
int nsurfs; /* number of surfaces */
|
| 82 |
SURF *slist; /* list of surfaces */
|
| 83 |
FVECT vup; /* up vector (zero if unset) */
|
| 84 |
FVECT nrm; /* average normal direction */
|
| 85 |
FVECT udir, vdir; /* tangent axes */
|
| 86 |
char *outfn; /* output file name (receiver) */
|
| 87 |
int (*sample_basis)(struct param_s *p, int, FILE *);
|
| 88 |
} PARAMS; /* sender/receiver parameters */
|
| 89 |
|
| 90 |
PARAMS curparams;
|
| 91 |
char curmod[128];
|
| 92 |
char newparams[1024];
|
| 93 |
|
| 94 |
typedef int SURFSAMP(FVECT, SURF *, double);
|
| 95 |
|
| 96 |
static SURFSAMP ssamp_bad, ssamp_poly, ssamp_ring;
|
| 97 |
|
| 98 |
SURFSAMP *orig_in_surf[4] = {
|
| 99 |
ssamp_bad, ssamp_poly, ssamp_ring, ssamp_bad
|
| 100 |
};
|
| 101 |
|
| 102 |
/* Clear parameter set */
|
| 103 |
void
|
| 104 |
clear_params(PARAMS *p, int reset_only)
|
| 105 |
{
|
| 106 |
while (p->slist != NULL) {
|
| 107 |
SURF *sdel = p->slist;
|
| 108 |
p->slist = sdel->next;
|
| 109 |
if (sdel->priv != NULL)
|
| 110 |
free(sdel->priv);
|
| 111 |
free(sdel);
|
| 112 |
}
|
| 113 |
if (reset_only) {
|
| 114 |
p->slist = NULL;
|
| 115 |
p->nsurfs = 0;
|
| 116 |
memset(p->nrm, 0, sizeof(FVECT));
|
| 117 |
memset(p->vup, 0, sizeof(FVECT));
|
| 118 |
p->outfn = NULL;
|
| 119 |
return;
|
| 120 |
}
|
| 121 |
memset(p, 0, sizeof(PARAMS));
|
| 122 |
}
|
| 123 |
|
| 124 |
/* Get surface type from name */
|
| 125 |
int
|
| 126 |
surf_type(const char *otype)
|
| 127 |
{
|
| 128 |
if (!strcmp(otype, "polygon"))
|
| 129 |
return(ST_POLY);
|
| 130 |
if (!strcmp(otype, "ring"))
|
| 131 |
return(ST_RING);
|
| 132 |
if (!strcmp(otype, "source"))
|
| 133 |
return(ST_SOURCE);
|
| 134 |
return(ST_NONE);
|
| 135 |
}
|
| 136 |
|
| 137 |
/* Add arguments to oconv command */
|
| 138 |
char *
|
| 139 |
oconv_command(int ac, char *av[])
|
| 140 |
{
|
| 141 |
static char oconvbuf[2048] = "!oconv -f ";
|
| 142 |
char *cp = oconvbuf + 10;
|
| 143 |
char *recv = *av++;
|
| 144 |
|
| 145 |
if (ac-- <= 0)
|
| 146 |
return(NULL);
|
| 147 |
if (verbose & NOWARN) { /* warnings off? */
|
| 148 |
strcpy(cp, "-w ");
|
| 149 |
cp += 3;
|
| 150 |
}
|
| 151 |
while (ac-- > 0) { /* copy each argument */
|
| 152 |
int len = strlen(*av);
|
| 153 |
if (cp+len+4 >= oconvbuf+sizeof(oconvbuf))
|
| 154 |
goto overrun;
|
| 155 |
if (matchany(*av, SPECIALS)) {
|
| 156 |
*cp++ = QUOTCHAR;
|
| 157 |
strcpy(cp, *av++);
|
| 158 |
cp += len;
|
| 159 |
*cp++ = QUOTCHAR;
|
| 160 |
} else {
|
| 161 |
strcpy(cp, *av++);
|
| 162 |
cp += len;
|
| 163 |
}
|
| 164 |
*cp++ = ' ';
|
| 165 |
}
|
| 166 |
/* receiver goes last */
|
| 167 |
if (matchany(recv, SPECIALS)) {
|
| 168 |
*cp++ = QUOTCHAR;
|
| 169 |
while (*recv) {
|
| 170 |
if (cp >= oconvbuf+(sizeof(oconvbuf)-3))
|
| 171 |
goto overrun;
|
| 172 |
*cp++ = *recv++;
|
| 173 |
}
|
| 174 |
*cp++ = QUOTCHAR;
|
| 175 |
*cp = '\0';
|
| 176 |
} else
|
| 177 |
strcpy(cp, recv);
|
| 178 |
return(oconvbuf);
|
| 179 |
overrun:
|
| 180 |
fputs(progname, stderr);
|
| 181 |
fputs(": too many file arguments!\n", stderr);
|
| 182 |
exit(1);
|
| 183 |
}
|
| 184 |
|
| 185 |
#if defined(_WIN32) || defined(_WIN64)
|
| 186 |
|
| 187 |
/* Open a pipe to/from a command given as an argument list */
|
| 188 |
FILE *
|
| 189 |
popen_arglist(char *av[], char *mode)
|
| 190 |
{
|
| 191 |
char cmd[10240];
|
| 192 |
|
| 193 |
if (!convert_commandline(cmd, sizeof(cmd), av)) {
|
| 194 |
fputs(progname, stderr);
|
| 195 |
fputs(": command line too long in popen_arglist()\n", stderr);
|
| 196 |
return(NULL);
|
| 197 |
}
|
| 198 |
if (verbose & VERBO)
|
| 199 |
fprintf(stderr, "%s: opening pipe %s: %s\n",
|
| 200 |
progname, (*mode=='w') ? "to" : "from", cmd);
|
| 201 |
return(popen(cmd, mode));
|
| 202 |
}
|
| 203 |
|
| 204 |
#define pclose_al pclose
|
| 205 |
|
| 206 |
/* Execute system command (Windows version) */
|
| 207 |
int
|
| 208 |
my_exec(char *av[])
|
| 209 |
{
|
| 210 |
char cmd[10240];
|
| 211 |
|
| 212 |
if (!convert_commandline(cmd, sizeof(cmd), av)) {
|
| 213 |
fputs(progname, stderr);
|
| 214 |
fputs(": command line too long in my_exec()\n", stderr);
|
| 215 |
return(1);
|
| 216 |
}
|
| 217 |
if (verbose & VERBO)
|
| 218 |
fprintf(stderr, "%s: running: %s\n", progname, cmd);
|
| 219 |
return(system(cmd));
|
| 220 |
}
|
| 221 |
|
| 222 |
#else /* UNIX */
|
| 223 |
|
| 224 |
static SUBPROC rt_proc = SP_INACTIVE; /* we only support one of these */
|
| 225 |
|
| 226 |
/* Open a pipe to a command using an argument list */
|
| 227 |
FILE *
|
| 228 |
popen_arglist(char *av[], char *mode)
|
| 229 |
{
|
| 230 |
int fd;
|
| 231 |
|
| 232 |
if (rt_proc.pid > 0) {
|
| 233 |
fprintf(stderr, "%s: only one i/o pipe at a time!\n", progname);
|
| 234 |
return(NULL);
|
| 235 |
}
|
| 236 |
if (verbose & VERBO) {
|
| 237 |
char cmd[4096];
|
| 238 |
if (!convert_commandline(cmd, sizeof(cmd), av))
|
| 239 |
strcpy(cmd, "COMMAND TOO LONG TO SHOW");
|
| 240 |
fprintf(stderr, "%s: opening pipe %s: %s\n",
|
| 241 |
progname, (*mode=='w') ? "to" : "from", cmd);
|
| 242 |
}
|
| 243 |
if (*mode == 'w') {
|
| 244 |
fd = rt_proc.w = dup(fileno(stdout));
|
| 245 |
rt_proc.flags |= PF_FILT_OUT;
|
| 246 |
} else if (*mode == 'r') {
|
| 247 |
fd = rt_proc.r = dup(fileno(stdin));
|
| 248 |
rt_proc.flags |= PF_FILT_INP;
|
| 249 |
}
|
| 250 |
if (fd < 0 || open_process(&rt_proc, av) <= 0) {
|
| 251 |
perror(av[0]);
|
| 252 |
return(NULL);
|
| 253 |
}
|
| 254 |
return(fdopen(fd, mode));
|
| 255 |
}
|
| 256 |
|
| 257 |
/* Close command pipe (returns -1 on error to match pclose) */
|
| 258 |
int
|
| 259 |
pclose_al(FILE *fp)
|
| 260 |
{
|
| 261 |
int prob = (fclose(fp) == EOF);
|
| 262 |
|
| 263 |
if (rt_proc.pid <= 0)
|
| 264 |
return(-1);
|
| 265 |
|
| 266 |
prob |= (close_process(&rt_proc) != 0);
|
| 267 |
|
| 268 |
return(-prob);
|
| 269 |
}
|
| 270 |
|
| 271 |
/* Execute system command in our stead (Unix version) */
|
| 272 |
int
|
| 273 |
my_exec(char *av[])
|
| 274 |
{
|
| 275 |
char *compath;
|
| 276 |
|
| 277 |
if ((compath = getpath((char *)av[0], getenv("PATH"), X_OK)) == NULL) {
|
| 278 |
fprintf(stderr, "%s: cannot locate %s\n", progname, av[0]);
|
| 279 |
return(1);
|
| 280 |
}
|
| 281 |
if (verbose & VERBO) {
|
| 282 |
char cmd[4096];
|
| 283 |
if (!convert_commandline(cmd, sizeof(cmd), av))
|
| 284 |
strcpy(cmd, "COMMAND TOO LONG TO SHOW");
|
| 285 |
fprintf(stderr, "%s: running: %s\n", progname, cmd);
|
| 286 |
}
|
| 287 |
execv(compath, av); /* successful call never returns */
|
| 288 |
perror(compath);
|
| 289 |
return(1);
|
| 290 |
}
|
| 291 |
|
| 292 |
#endif
|
| 293 |
|
| 294 |
/* Get normalized direction vector from string specification */
|
| 295 |
int
|
| 296 |
get_direction(FVECT dv, const char *s)
|
| 297 |
{
|
| 298 |
int sign = 1;
|
| 299 |
int axis = 0;
|
| 300 |
|
| 301 |
memset(dv, 0, sizeof(FVECT));
|
| 302 |
nextchar:
|
| 303 |
switch (*s) {
|
| 304 |
case '+':
|
| 305 |
++s;
|
| 306 |
goto nextchar;
|
| 307 |
case '-':
|
| 308 |
sign = -sign;
|
| 309 |
++s;
|
| 310 |
goto nextchar;
|
| 311 |
case 'z':
|
| 312 |
case 'Z':
|
| 313 |
++axis;
|
| 314 |
case 'y':
|
| 315 |
case 'Y':
|
| 316 |
++axis;
|
| 317 |
case 'x':
|
| 318 |
case 'X':
|
| 319 |
dv[axis] = sign;
|
| 320 |
return(!s[1] | isspace(s[1]));
|
| 321 |
default:
|
| 322 |
break;
|
| 323 |
}
|
| 324 |
#ifdef SMLFLT
|
| 325 |
if (sscanf(s, "%f,%f,%f", &dv[0], &dv[1], &dv[2]) != 3)
|
| 326 |
#else
|
| 327 |
if (sscanf(s, "%lf,%lf,%lf", &dv[0], &dv[1], &dv[2]) != 3)
|
| 328 |
#endif
|
| 329 |
return(0);
|
| 330 |
dv[0] *= (RREAL)sign;
|
| 331 |
return(normalize(dv) > 0);
|
| 332 |
}
|
| 333 |
|
| 334 |
/* Parse program parameters (directives) */
|
| 335 |
int
|
| 336 |
parse_params(PARAMS *p, char *pargs)
|
| 337 |
{
|
| 338 |
char *cp = pargs;
|
| 339 |
int nparams = 0;
|
| 340 |
int quot;
|
| 341 |
int i;
|
| 342 |
|
| 343 |
for ( ; ; ) {
|
| 344 |
switch (*cp++) {
|
| 345 |
case 'h':
|
| 346 |
if (*cp++ != '=')
|
| 347 |
break;
|
| 348 |
if ((*cp == '+') | (*cp == '-'))
|
| 349 |
p->sign = *cp++;
|
| 350 |
else
|
| 351 |
p->sign = '+';
|
| 352 |
p->hsiz = 0;
|
| 353 |
i = 0;
|
| 354 |
while (*cp && !isspace(*cp)) {
|
| 355 |
if (isdigit(*cp))
|
| 356 |
p->hsiz = 10*p->hsiz + *cp - '0';
|
| 357 |
p->hemis[i++] = *cp++;
|
| 358 |
}
|
| 359 |
if (!i)
|
| 360 |
break;
|
| 361 |
p->hemis[i] = '\0';
|
| 362 |
p->hsiz += !p->hsiz;
|
| 363 |
++nparams;
|
| 364 |
continue;
|
| 365 |
case 'u':
|
| 366 |
if (*cp++ != '=')
|
| 367 |
break;
|
| 368 |
if (!get_direction(p->vup, cp))
|
| 369 |
break;
|
| 370 |
while (*cp && !isspace(*cp++))
|
| 371 |
;
|
| 372 |
++nparams;
|
| 373 |
continue;
|
| 374 |
case 'o':
|
| 375 |
if (*cp++ != '=')
|
| 376 |
break;
|
| 377 |
quot = 0;
|
| 378 |
if ((*cp == '"') | (*cp == '\''))
|
| 379 |
quot = *cp++;
|
| 380 |
i = 0;
|
| 381 |
while (*cp && (quot ? (*cp != quot) : !isspace(*cp))) {
|
| 382 |
i++; cp++;
|
| 383 |
}
|
| 384 |
if (!i)
|
| 385 |
break;
|
| 386 |
if (!*cp) {
|
| 387 |
if (quot)
|
| 388 |
break;
|
| 389 |
cp[1] = '\0';
|
| 390 |
}
|
| 391 |
*cp = '\0';
|
| 392 |
p->outfn = savqstr(cp-i);
|
| 393 |
*cp++ = quot ? quot : ' ';
|
| 394 |
++nparams;
|
| 395 |
continue;
|
| 396 |
case ' ':
|
| 397 |
case '\t':
|
| 398 |
case '\r':
|
| 399 |
case '\n':
|
| 400 |
continue;
|
| 401 |
case '\0':
|
| 402 |
return(nparams);
|
| 403 |
default:
|
| 404 |
break;
|
| 405 |
}
|
| 406 |
break;
|
| 407 |
}
|
| 408 |
fprintf(stderr, "%s: bad parameter string: %s", progname, pargs);
|
| 409 |
exit(1);
|
| 410 |
return(-1); /* pro forma return */
|
| 411 |
}
|
| 412 |
|
| 413 |
/* Append bin jitter to the parameter string */
|
| 414 |
int
|
| 415 |
addbinjitter(char *s)
|
| 416 |
{
|
| 417 |
if (binjitter == NULL)
|
| 418 |
return(0);
|
| 419 |
s += strlen(s);
|
| 420 |
strcpy(s, ",JTR=");
|
| 421 |
strcpy(s+5, binjitter);
|
| 422 |
return(1);
|
| 423 |
}
|
| 424 |
|
| 425 |
/* Add receiver arguments (directives) corresponding to the current modifier */
|
| 426 |
void
|
| 427 |
finish_receiver(void)
|
| 428 |
{
|
| 429 |
char sbuf[256];
|
| 430 |
int uniform = 0;
|
| 431 |
char *calfn = NULL;
|
| 432 |
char *params = NULL;
|
| 433 |
char *binv = NULL;
|
| 434 |
char *binf = NULL;
|
| 435 |
char *nbins = NULL;
|
| 436 |
|
| 437 |
if (!curmod[0]) {
|
| 438 |
fputs(progname, stderr);
|
| 439 |
fputs(": missing receiver surface!\n", stderr);
|
| 440 |
exit(1);
|
| 441 |
}
|
| 442 |
if (curparams.outfn != NULL) { /* add output file spec. */
|
| 443 |
CHECKARGC(2);
|
| 444 |
rcarg[nrcargs++] = "-o";
|
| 445 |
rcarg[nrcargs++] = curparams.outfn;
|
| 446 |
}
|
| 447 |
/* check arguments */
|
| 448 |
if (!curparams.hemis[0]) {
|
| 449 |
fputs(progname, stderr);
|
| 450 |
fputs(": missing hemisphere sampling type!\n", stderr);
|
| 451 |
exit(1);
|
| 452 |
}
|
| 453 |
if (normalize(curparams.nrm) == 0) {
|
| 454 |
fputs(progname, stderr);
|
| 455 |
fputs(": undefined normal for hemisphere sampling\n", stderr);
|
| 456 |
exit(1);
|
| 457 |
}
|
| 458 |
if (normalize(curparams.vup) == 0) {
|
| 459 |
if (fabs(curparams.nrm[2]) < .7)
|
| 460 |
curparams.vup[2] = 1;
|
| 461 |
else
|
| 462 |
curparams.vup[1] = 1;
|
| 463 |
}
|
| 464 |
/* determine sample type/bin */
|
| 465 |
if ((tolower(curparams.hemis[0]) == 'u') | (curparams.hemis[0] == '1')) {
|
| 466 |
if (curparams.slist->styp != ST_SOURCE) {
|
| 467 |
sprintf(sbuf, "if(-Dx*%g-Dy*%g-Dz*%g,0,-1)",
|
| 468 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2]);
|
| 469 |
binv = savqstr(sbuf);
|
| 470 |
} else
|
| 471 |
binv = "0";
|
| 472 |
nbins = "1"; /* uniform sampling -- one bin */
|
| 473 |
uniform = 1;
|
| 474 |
} else if (tolower(curparams.hemis[0]) == 's' &&
|
| 475 |
tolower(curparams.hemis[1]) == 'c') {
|
| 476 |
/* assign parameters */
|
| 477 |
if (curparams.hsiz <= 1) {
|
| 478 |
fputs(progname, stderr);
|
| 479 |
fputs(": missing size for Shirley-Chiu sampling!\n", stderr);
|
| 480 |
exit(1);
|
| 481 |
}
|
| 482 |
calfn = shirchiufn; shirchiufn = NULL;
|
| 483 |
sprintf(sbuf, "SCdim=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g,RHS=%c1",
|
| 484 |
curparams.hsiz,
|
| 485 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2],
|
| 486 |
curparams.vup[0], curparams.vup[1], curparams.vup[2],
|
| 487 |
curparams.sign);
|
| 488 |
addbinjitter(sbuf);
|
| 489 |
params = savqstr(sbuf);
|
| 490 |
binv = "scbin";
|
| 491 |
nbins = "SCdim*SCdim";
|
| 492 |
} else if ((tolower(curparams.hemis[0]) == 'r') |
|
| 493 |
(tolower(curparams.hemis[0]) == 't')) {
|
| 494 |
calfn = reinhfn; reinhfn = NULL;
|
| 495 |
sprintf(sbuf, "MF=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g,RHS=%c1",
|
| 496 |
curparams.hsiz,
|
| 497 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2],
|
| 498 |
curparams.vup[0], curparams.vup[1], curparams.vup[2],
|
| 499 |
curparams.sign);
|
| 500 |
addbinjitter(sbuf);
|
| 501 |
params = savqstr(sbuf);
|
| 502 |
binv = "rbin";
|
| 503 |
nbins = "Nrbins";
|
| 504 |
} else if (tolower(curparams.hemis[0]) == 'k' &&
|
| 505 |
!curparams.hemis[1] |
|
| 506 |
(tolower(curparams.hemis[1]) == 'f') |
|
| 507 |
(curparams.hemis[1] == '1')) {
|
| 508 |
calfn = kfullfn; kfullfn = NULL;
|
| 509 |
binf = "kbin";
|
| 510 |
nbins = "Nkbins";
|
| 511 |
} else if (tolower(curparams.hemis[0]) == 'k' &&
|
| 512 |
(tolower(curparams.hemis[1]) == 'h') |
|
| 513 |
(curparams.hemis[1] == '2')) {
|
| 514 |
calfn = khalffn; khalffn = NULL;
|
| 515 |
binf = "khbin";
|
| 516 |
nbins = "Nkhbins";
|
| 517 |
} else if (tolower(curparams.hemis[0]) == 'k' &&
|
| 518 |
(tolower(curparams.hemis[1]) == 'q') |
|
| 519 |
(curparams.hemis[1] == '4')) {
|
| 520 |
calfn = kquarterfn; kquarterfn = NULL;
|
| 521 |
binf = "kqbin";
|
| 522 |
nbins = "Nkqbins";
|
| 523 |
} else if (!strcasecmp(curparams.hemis, "cie")) {
|
| 524 |
calfn = ciefn; ciefn = NULL;
|
| 525 |
sprintf(sbuf, "rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g,RHS=%c1",
|
| 526 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2],
|
| 527 |
curparams.vup[0], curparams.vup[1], curparams.vup[2],
|
| 528 |
curparams.sign);
|
| 529 |
addbinjitter(sbuf);
|
| 530 |
params = savqstr(sbuf);
|
| 531 |
binv = "cbin";
|
| 532 |
nbins = "Ncbins";
|
| 533 |
} else {
|
| 534 |
fprintf(stderr, "%s: unrecognized hemisphere sampling: h=%s\n",
|
| 535 |
progname, curparams.hemis);
|
| 536 |
exit(1);
|
| 537 |
}
|
| 538 |
if (tolower(curparams.hemis[0]) == 'k') {
|
| 539 |
sprintf(sbuf, "RHS=%c1", curparams.sign);
|
| 540 |
addbinjitter(sbuf);
|
| 541 |
params = savqstr(sbuf);
|
| 542 |
}
|
| 543 |
if (!uniform) {
|
| 544 |
SURF *sp;
|
| 545 |
for (sp = curparams.slist; sp != NULL; sp = sp->next)
|
| 546 |
if (sp->styp == ST_SOURCE && fabs(sp->area - PI) > 1e-3) {
|
| 547 |
fprintf(stderr, "%s: source '%s' must be 180-degrees\n",
|
| 548 |
progname, sp->sname);
|
| 549 |
exit(1);
|
| 550 |
}
|
| 551 |
}
|
| 552 |
if (calfn != NULL) { /* add cal file if needed */
|
| 553 |
CHECKARGC(2);
|
| 554 |
rcarg[nrcargs++] = "-f";
|
| 555 |
rcarg[nrcargs++] = calfn;
|
| 556 |
}
|
| 557 |
if (params != NULL) { /* parameters _after_ cal file */
|
| 558 |
CHECKARGC(2);
|
| 559 |
rcarg[nrcargs++] = "-p";
|
| 560 |
rcarg[nrcargs++] = params;
|
| 561 |
}
|
| 562 |
if (nbins != NULL) { /* add #bins if set */
|
| 563 |
CHECKARGC(2);
|
| 564 |
rcarg[nrcargs++] = "-bn";
|
| 565 |
rcarg[nrcargs++] = nbins;
|
| 566 |
}
|
| 567 |
if (binv != NULL) {
|
| 568 |
CHECKARGC(2); /* assign bin variable */
|
| 569 |
rcarg[nrcargs++] = "-b";
|
| 570 |
rcarg[nrcargs++] = binv;
|
| 571 |
} else if (binf != NULL) {
|
| 572 |
CHECKARGC(2); /* assign bin function */
|
| 573 |
rcarg[nrcargs++] = "-b";
|
| 574 |
sprintf(sbuf, "%s(%g,%g,%g,%g,%g,%g)", binf,
|
| 575 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2],
|
| 576 |
curparams.vup[0], curparams.vup[1], curparams.vup[2]);
|
| 577 |
rcarg[nrcargs++] = savqstr(sbuf);
|
| 578 |
}
|
| 579 |
CHECKARGC(2); /* modifier argument goes last */
|
| 580 |
rcarg[nrcargs++] = "-m";
|
| 581 |
rcarg[nrcargs++] = savqstr(curmod);
|
| 582 |
}
|
| 583 |
|
| 584 |
/* Make randomly oriented tangent plane axes for given normal direction */
|
| 585 |
void
|
| 586 |
make_axes(FVECT uva[2], const FVECT nrm)
|
| 587 |
{
|
| 588 |
int i;
|
| 589 |
|
| 590 |
if (!getperpendicular(uva[0], nrm, 1)) {
|
| 591 |
fputs(progname, stderr);
|
| 592 |
fputs(": bad surface normal in make_axes!\n", stderr);
|
| 593 |
exit(1);
|
| 594 |
}
|
| 595 |
fcross(uva[1], nrm, uva[0]);
|
| 596 |
}
|
| 597 |
|
| 598 |
/* Illegal sender surfaces end up here */
|
| 599 |
int
|
| 600 |
ssamp_bad(FVECT orig, SURF *sp, double x)
|
| 601 |
{
|
| 602 |
fprintf(stderr, "%s: illegal sender surface '%s'\n",
|
| 603 |
progname, sp->sname);
|
| 604 |
return(0);
|
| 605 |
}
|
| 606 |
|
| 607 |
/* Generate origin on ring surface from uniform random variable */
|
| 608 |
int
|
| 609 |
ssamp_ring(FVECT orig, SURF *sp, double x)
|
| 610 |
{
|
| 611 |
FVECT *uva = (FVECT *)sp->priv;
|
| 612 |
double samp2[2];
|
| 613 |
double uv[2];
|
| 614 |
int i;
|
| 615 |
|
| 616 |
if (uva == NULL) { /* need tangent axes */
|
| 617 |
uva = (FVECT *)malloc(sizeof(FVECT)*2);
|
| 618 |
if (uva == NULL) {
|
| 619 |
fputs(progname, stderr);
|
| 620 |
fputs(": out of memory in ssamp_ring!\n", stderr);
|
| 621 |
return(0);
|
| 622 |
}
|
| 623 |
make_axes(uva, sp->snrm);
|
| 624 |
sp->priv = (void *)uva;
|
| 625 |
}
|
| 626 |
SDmultiSamp(samp2, 2, x);
|
| 627 |
samp2[0] = sqrt(samp2[0]*sp->area*(1./PI) + sp->farg[6]*sp->farg[6]);
|
| 628 |
samp2[1] *= 2.*PI;
|
| 629 |
uv[0] = samp2[0]*tcos(samp2[1]);
|
| 630 |
uv[1] = samp2[0]*tsin(samp2[1]);
|
| 631 |
for (i = 3; i--; )
|
| 632 |
orig[i] = sp->farg[i] + uv[0]*uva[0][i] + uv[1]*uva[1][i];
|
| 633 |
return(1);
|
| 634 |
}
|
| 635 |
|
| 636 |
/* Add triangle to polygon's list (call-back function) */
|
| 637 |
int
|
| 638 |
add_triangle(const Vert2_list *tp, int a, int b, int c)
|
| 639 |
{
|
| 640 |
POLYTRIS *ptp = (POLYTRIS *)tp->p;
|
| 641 |
struct ptri *trip = ptp->tri + ptp->ntris++;
|
| 642 |
|
| 643 |
trip->vndx[0] = a;
|
| 644 |
trip->vndx[1] = b;
|
| 645 |
trip->vndx[2] = c;
|
| 646 |
return(1);
|
| 647 |
}
|
| 648 |
|
| 649 |
/* Generate origin on polygon surface from uniform random variable */
|
| 650 |
int
|
| 651 |
ssamp_poly(FVECT orig, SURF *sp, double x)
|
| 652 |
{
|
| 653 |
POLYTRIS *ptp = (POLYTRIS *)sp->priv;
|
| 654 |
double samp2[2];
|
| 655 |
double *v0, *v1, *v2;
|
| 656 |
int i;
|
| 657 |
|
| 658 |
if (ptp == NULL) { /* need to triangulate */
|
| 659 |
ptp = (POLYTRIS *)malloc(sizeof(POLYTRIS) +
|
| 660 |
sizeof(struct ptri)*(sp->nfargs/3 - 3));
|
| 661 |
if (ptp == NULL)
|
| 662 |
goto memerr;
|
| 663 |
if (sp->nfargs == 3) { /* simple case */
|
| 664 |
ptp->ntris = 1;
|
| 665 |
ptp->tri[0].vndx[0] = 0;
|
| 666 |
ptp->tri[0].vndx[1] = 1;
|
| 667 |
ptp->tri[0].vndx[2] = 2;
|
| 668 |
ptp->tri[0].afrac = 1;
|
| 669 |
} else {
|
| 670 |
Vert2_list *v2l = polyAlloc(sp->nfargs/3);
|
| 671 |
if (v2l == NULL)
|
| 672 |
goto memerr;
|
| 673 |
make_axes(ptp->uva, sp->snrm);
|
| 674 |
for (i = v2l->nv; i--; ) {
|
| 675 |
v2l->v[i].mX = DOT(sp->farg+3*i, ptp->uva[0]);
|
| 676 |
v2l->v[i].mY = DOT(sp->farg+3*i, ptp->uva[1]);
|
| 677 |
}
|
| 678 |
ptp->ntris = 0;
|
| 679 |
v2l->p = (void *)ptp;
|
| 680 |
if (!polyTriangulate(v2l, add_triangle)) {
|
| 681 |
fprintf(stderr,
|
| 682 |
"%s: cannot triangulate polygon '%s'\n",
|
| 683 |
progname, sp->sname);
|
| 684 |
return(0);
|
| 685 |
}
|
| 686 |
for (i = ptp->ntris; i--; ) {
|
| 687 |
int a = ptp->tri[i].vndx[0];
|
| 688 |
int b = ptp->tri[i].vndx[1];
|
| 689 |
int c = ptp->tri[i].vndx[2];
|
| 690 |
ptp->tri[i].afrac =
|
| 691 |
(v2l->v[a].mX*v2l->v[b].mY -
|
| 692 |
v2l->v[b].mX*v2l->v[a].mY +
|
| 693 |
v2l->v[b].mX*v2l->v[c].mY -
|
| 694 |
v2l->v[c].mX*v2l->v[b].mY +
|
| 695 |
v2l->v[c].mX*v2l->v[a].mY -
|
| 696 |
v2l->v[a].mX*v2l->v[c].mY) /
|
| 697 |
(2.*sp->area);
|
| 698 |
}
|
| 699 |
polyFree(v2l);
|
| 700 |
}
|
| 701 |
sp->priv = (void *)ptp;
|
| 702 |
}
|
| 703 |
/* pick triangle by partial area */
|
| 704 |
for (i = 0; i < ptp->ntris-1 && x > ptp->tri[i].afrac; i++)
|
| 705 |
x -= ptp->tri[i].afrac;
|
| 706 |
SDmultiSamp(samp2, 2, x/ptp->tri[i].afrac);
|
| 707 |
samp2[0] *= samp2[1] = sqrt(samp2[1]);
|
| 708 |
samp2[1] = 1. - samp2[1];
|
| 709 |
v0 = sp->farg + 3*ptp->tri[i].vndx[0];
|
| 710 |
v1 = sp->farg + 3*ptp->tri[i].vndx[1];
|
| 711 |
v2 = sp->farg + 3*ptp->tri[i].vndx[2];
|
| 712 |
for (i = 3; i--; )
|
| 713 |
orig[i] = v0[i] + samp2[0]*(v1[i] - v0[i])
|
| 714 |
+ samp2[1]*(v2[i] - v0[i]) ;
|
| 715 |
return(1);
|
| 716 |
memerr:
|
| 717 |
fputs(progname, stderr);
|
| 718 |
fputs(": out of memory in ssamp_poly!\n", stderr);
|
| 719 |
return(0);
|
| 720 |
}
|
| 721 |
|
| 722 |
/* Compute sample origin based on projected areas of sender subsurfaces */
|
| 723 |
int
|
| 724 |
sample_origin(PARAMS *p, FVECT orig, const FVECT rdir, double x)
|
| 725 |
{
|
| 726 |
static double *projsa;
|
| 727 |
static int nall;
|
| 728 |
double tarea = 0;
|
| 729 |
int i;
|
| 730 |
SURF *sp;
|
| 731 |
/* special case for lone surface */
|
| 732 |
if (p->nsurfs == 1) {
|
| 733 |
sp = p->slist;
|
| 734 |
if (DOT(sp->snrm, rdir) >= FTINY) {
|
| 735 |
fprintf(stderr,
|
| 736 |
"%s: internal - sample behind sender '%s'\n",
|
| 737 |
progname, sp->sname);
|
| 738 |
return(0);
|
| 739 |
}
|
| 740 |
return((*orig_in_surf[sp->styp])(orig, sp, x));
|
| 741 |
}
|
| 742 |
if (p->nsurfs > nall) { /* (re)allocate surface area cache */
|
| 743 |
if (projsa) free(projsa);
|
| 744 |
projsa = (double *)malloc(sizeof(double)*p->nsurfs);
|
| 745 |
if (projsa == NULL) {
|
| 746 |
fputs(progname, stderr);
|
| 747 |
fputs(": out of memory in sample_origin!\n", stderr);
|
| 748 |
exit(1);
|
| 749 |
}
|
| 750 |
nall = p->nsurfs;
|
| 751 |
}
|
| 752 |
/* compute projected areas */
|
| 753 |
for (i = 0, sp = p->slist; sp != NULL; i++, sp = sp->next) {
|
| 754 |
projsa[i] = -DOT(sp->snrm, rdir) * sp->area;
|
| 755 |
tarea += projsa[i] *= (double)(projsa[i] > 0);
|
| 756 |
}
|
| 757 |
if (tarea < FTINY*FTINY) { /* wrong side of sender? */
|
| 758 |
fputs(progname, stderr);
|
| 759 |
fputs(": internal - sample behind all sender elements!\n",
|
| 760 |
stderr);
|
| 761 |
return(0);
|
| 762 |
}
|
| 763 |
tarea *= x; /* get surface from list */
|
| 764 |
for (i = 0, sp = p->slist; tarea > projsa[i]; sp = sp->next)
|
| 765 |
tarea -= projsa[i++];
|
| 766 |
return((*orig_in_surf[sp->styp])(orig, sp, tarea/projsa[i]));
|
| 767 |
}
|
| 768 |
|
| 769 |
/* Uniform sample generator */
|
| 770 |
int
|
| 771 |
sample_uniform(PARAMS *p, int b, FILE *fp)
|
| 772 |
{
|
| 773 |
int n = sampcnt;
|
| 774 |
double samp3[3];
|
| 775 |
FVECT duvw, orig_dir[2];
|
| 776 |
int i;
|
| 777 |
|
| 778 |
if (fp == NULL) /* just requesting number of bins? */
|
| 779 |
return(1);
|
| 780 |
|
| 781 |
while (n--) { /* stratified hemisphere sampling */
|
| 782 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt);
|
| 783 |
square2disk(duvw, samp3[1], samp3[2]);
|
| 784 |
duvw[2] = -sqrt(1. - duvw[0]*duvw[0] - duvw[1]*duvw[1]);
|
| 785 |
for (i = 3; i--; )
|
| 786 |
orig_dir[1][i] = duvw[0]*p->udir[i] +
|
| 787 |
duvw[1]*p->vdir[i] +
|
| 788 |
duvw[2]*p->nrm[i] ;
|
| 789 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0]))
|
| 790 |
return(0);
|
| 791 |
if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2)
|
| 792 |
return(0);
|
| 793 |
}
|
| 794 |
return(1);
|
| 795 |
}
|
| 796 |
|
| 797 |
/* Shirly-Chiu sample generator */
|
| 798 |
int
|
| 799 |
sample_shirchiu(PARAMS *p, int b, FILE *fp)
|
| 800 |
{
|
| 801 |
int n = sampcnt;
|
| 802 |
double samp3[3];
|
| 803 |
FVECT duvw, orig_dir[2];
|
| 804 |
int i;
|
| 805 |
|
| 806 |
if (fp == NULL) /* just requesting number of bins? */
|
| 807 |
return(p->hsiz*p->hsiz);
|
| 808 |
|
| 809 |
while (n--) { /* stratified sampling */
|
| 810 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt);
|
| 811 |
square2disk(duvw, (b/p->hsiz + samp3[1])/curparams.hsiz,
|
| 812 |
(b%p->hsiz + samp3[2])/curparams.hsiz);
|
| 813 |
duvw[2] = sqrt(1. - duvw[0]*duvw[0] - duvw[1]*duvw[1]);
|
| 814 |
for (i = 3; i--; )
|
| 815 |
orig_dir[1][i] = -duvw[0]*p->udir[i] -
|
| 816 |
duvw[1]*p->vdir[i] -
|
| 817 |
duvw[2]*p->nrm[i] ;
|
| 818 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0]))
|
| 819 |
return(0);
|
| 820 |
if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2)
|
| 821 |
return(0);
|
| 822 |
}
|
| 823 |
return(1);
|
| 824 |
}
|
| 825 |
|
| 826 |
/* Reinhart/Tregenza sample generator */
|
| 827 |
int
|
| 828 |
sample_reinhart(PARAMS *p, int b, FILE *fp)
|
| 829 |
{
|
| 830 |
#define T_NALT 7
|
| 831 |
static const int tnaz[T_NALT] = {30, 30, 24, 24, 18, 12, 6};
|
| 832 |
const int RowMax = T_NALT*p->hsiz + 1;
|
| 833 |
const double RAH = (.5*PI)/(RowMax-.5);
|
| 834 |
#define rnaz(r) (r >= RowMax-1 ? 1 : p->hsiz*tnaz[r/p->hsiz])
|
| 835 |
int n = sampcnt;
|
| 836 |
int row, col;
|
| 837 |
double samp3[3];
|
| 838 |
double alt, azi;
|
| 839 |
double duvw[3];
|
| 840 |
FVECT orig_dir[2];
|
| 841 |
int i;
|
| 842 |
|
| 843 |
if (fp == NULL) { /* just requesting number of bins? */
|
| 844 |
n = 0;
|
| 845 |
for (row = RowMax; row--; ) n += rnaz(row);
|
| 846 |
return(n);
|
| 847 |
}
|
| 848 |
row = 0; /* identify row & column */
|
| 849 |
col = b;
|
| 850 |
while (col >= rnaz(row)) {
|
| 851 |
col -= rnaz(row);
|
| 852 |
++row;
|
| 853 |
}
|
| 854 |
while (n--) { /* stratified sampling */
|
| 855 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt);
|
| 856 |
if (row >= RowMax-1) /* avoid crowding at zenith */
|
| 857 |
samp3[1] *= samp3[1];
|
| 858 |
alt = (row+samp3[1])*RAH;
|
| 859 |
azi = (2.*PI)*(col+samp3[2]-.5)/rnaz(row);
|
| 860 |
duvw[2] = cos(alt); /* measured from horizon */
|
| 861 |
duvw[0] = tsin(azi)*duvw[2];
|
| 862 |
duvw[1] = -tcos(azi)*duvw[2];
|
| 863 |
duvw[2] = sqrt(1. - duvw[2]*duvw[2]);
|
| 864 |
for (i = 3; i--; )
|
| 865 |
orig_dir[1][i] = -duvw[0]*p->udir[i] -
|
| 866 |
duvw[1]*p->vdir[i] -
|
| 867 |
duvw[2]*p->nrm[i] ;
|
| 868 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0]))
|
| 869 |
return(0);
|
| 870 |
if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2)
|
| 871 |
return(0);
|
| 872 |
}
|
| 873 |
return(1);
|
| 874 |
#undef rnaz
|
| 875 |
#undef T_NALT
|
| 876 |
}
|
| 877 |
|
| 878 |
/* Klems sample generator */
|
| 879 |
int
|
| 880 |
sample_klems(PARAMS *p, int b, FILE *fp)
|
| 881 |
{
|
| 882 |
static const char bname[4][20] = {
|
| 883 |
"LBNL/Klems Full",
|
| 884 |
"LBNL/Klems Half",
|
| 885 |
"INTERNAL ERROR",
|
| 886 |
"LBNL/Klems Quarter"
|
| 887 |
};
|
| 888 |
static ANGLE_BASIS *kbasis[4];
|
| 889 |
const int bi = p->hemis[1] - '1';
|
| 890 |
int n = sampcnt;
|
| 891 |
double samp2[2];
|
| 892 |
double duvw[3];
|
| 893 |
FVECT orig_dir[2];
|
| 894 |
int i;
|
| 895 |
|
| 896 |
if (!kbasis[bi]) { /* need to get basis, first */
|
| 897 |
for (i = 4; i--; )
|
| 898 |
if (!strcasecmp(abase_list[i].name, bname[bi])) {
|
| 899 |
kbasis[bi] = &abase_list[i];
|
| 900 |
break;
|
| 901 |
}
|
| 902 |
if (i < 0) {
|
| 903 |
fprintf(stderr, "%s: unknown hemisphere basis '%s'\n",
|
| 904 |
progname, bname[bi]);
|
| 905 |
return(0);
|
| 906 |
}
|
| 907 |
}
|
| 908 |
if (fp == NULL) /* just requesting number of bins? */
|
| 909 |
return(kbasis[bi]->nangles);
|
| 910 |
|
| 911 |
while (n--) { /* stratified sampling */
|
| 912 |
SDmultiSamp(samp2, 2, (n+frandom())/sampcnt);
|
| 913 |
if (!fo_getvec(duvw, b+samp2[1], kbasis[bi]))
|
| 914 |
return(0);
|
| 915 |
for (i = 3; i--; )
|
| 916 |
orig_dir[1][i] = -duvw[0]*p->udir[i] -
|
| 917 |
duvw[1]*p->vdir[i] -
|
| 918 |
duvw[2]*p->nrm[i] ;
|
| 919 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp2[0]))
|
| 920 |
return(0);
|
| 921 |
if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2)
|
| 922 |
return(0);
|
| 923 |
}
|
| 924 |
return(1);
|
| 925 |
}
|
| 926 |
|
| 927 |
/* Prepare hemisphere basis sampler that will send rays to rcontrib */
|
| 928 |
int
|
| 929 |
prepare_sampler(PARAMS *p)
|
| 930 |
{
|
| 931 |
if (p->slist == NULL) { /* missing sample surface! */
|
| 932 |
fputs(progname, stderr);
|
| 933 |
fputs(": no sender surface!\n", stderr);
|
| 934 |
return(-1);
|
| 935 |
}
|
| 936 |
/* misplaced output file spec. */
|
| 937 |
if ((p->outfn != NULL) & !(verbose & NOWARN))
|
| 938 |
fprintf(stderr, "%s: warning - ignoring output file in sender ('%s')\n",
|
| 939 |
progname, p->outfn);
|
| 940 |
/* check/set basis hemisphere */
|
| 941 |
if (!p->hemis[0]) {
|
| 942 |
fputs(progname, stderr);
|
| 943 |
fputs(": missing sender sampling type!\n", stderr);
|
| 944 |
return(-1);
|
| 945 |
}
|
| 946 |
if (normalize(p->nrm) == 0) {
|
| 947 |
fputs(progname, stderr);
|
| 948 |
fputs(": undefined normal for sender sampling\n", stderr);
|
| 949 |
return(-1);
|
| 950 |
}
|
| 951 |
if (normalize(p->vup) == 0) {
|
| 952 |
if (fabs(p->nrm[2]) < .7)
|
| 953 |
p->vup[2] = 1;
|
| 954 |
else
|
| 955 |
p->vup[1] = 1;
|
| 956 |
}
|
| 957 |
fcross(p->udir, p->vup, p->nrm);
|
| 958 |
if (normalize(p->udir) == 0) {
|
| 959 |
fputs(progname, stderr);
|
| 960 |
fputs(": up vector coincides with sender normal\n", stderr);
|
| 961 |
return(-1);
|
| 962 |
}
|
| 963 |
fcross(p->vdir, p->nrm, p->udir);
|
| 964 |
if (p->sign == '-') { /* left-handed coordinate system? */
|
| 965 |
p->udir[0] *= -1.;
|
| 966 |
p->udir[1] *= -1.;
|
| 967 |
p->udir[2] *= -1.;
|
| 968 |
}
|
| 969 |
if ((tolower(p->hemis[0]) == 'u') | (p->hemis[0] == '1'))
|
| 970 |
p->sample_basis = sample_uniform;
|
| 971 |
else if (tolower(p->hemis[0]) == 's' &&
|
| 972 |
tolower(p->hemis[1]) == 'c')
|
| 973 |
p->sample_basis = sample_shirchiu;
|
| 974 |
else if ((tolower(p->hemis[0]) == 'r') |
|
| 975 |
(tolower(p->hemis[0]) == 't'))
|
| 976 |
p->sample_basis = sample_reinhart;
|
| 977 |
else if (tolower(p->hemis[0]) == 'k') {
|
| 978 |
switch (p->hemis[1]) {
|
| 979 |
case '1':
|
| 980 |
case '2':
|
| 981 |
case '4':
|
| 982 |
break;
|
| 983 |
case 'f':
|
| 984 |
case 'F':
|
| 985 |
case '\0':
|
| 986 |
p->hemis[1] = '1';
|
| 987 |
break;
|
| 988 |
case 'h':
|
| 989 |
case 'H':
|
| 990 |
p->hemis[1] = '2';
|
| 991 |
break;
|
| 992 |
case 'q':
|
| 993 |
case 'Q':
|
| 994 |
p->hemis[1] = '4';
|
| 995 |
break;
|
| 996 |
default:
|
| 997 |
goto unrecognized;
|
| 998 |
}
|
| 999 |
p->hemis[2] = '\0';
|
| 1000 |
p->sample_basis = sample_klems;
|
| 1001 |
} else
|
| 1002 |
goto unrecognized;
|
| 1003 |
/* return number of bins */
|
| 1004 |
return((*p->sample_basis)(p,0,NULL));
|
| 1005 |
unrecognized:
|
| 1006 |
fprintf(stderr, "%s: unrecognized sender sampling: h=%s\n",
|
| 1007 |
progname, p->hemis);
|
| 1008 |
return(-1);
|
| 1009 |
}
|
| 1010 |
|
| 1011 |
/* Compute normal and area for polygon */
|
| 1012 |
int
|
| 1013 |
finish_polygon(SURF *p)
|
| 1014 |
{
|
| 1015 |
const int nv = p->nfargs / 3;
|
| 1016 |
FVECT e1, e2, vc;
|
| 1017 |
int i;
|
| 1018 |
|
| 1019 |
memset(p->snrm, 0, sizeof(FVECT));
|
| 1020 |
VSUB(e1, p->farg+3, p->farg);
|
| 1021 |
for (i = 2; i < nv; i++) {
|
| 1022 |
VSUB(e2, p->farg+3*i, p->farg);
|
| 1023 |
VCROSS(vc, e1, e2);
|
| 1024 |
p->snrm[0] += vc[0];
|
| 1025 |
p->snrm[1] += vc[1];
|
| 1026 |
p->snrm[2] += vc[2];
|
| 1027 |
VCOPY(e1, e2);
|
| 1028 |
}
|
| 1029 |
p->area = normalize(p->snrm)*0.5;
|
| 1030 |
return(p->area > FTINY*FTINY);
|
| 1031 |
}
|
| 1032 |
|
| 1033 |
/* Add a surface to our current parameters */
|
| 1034 |
void
|
| 1035 |
add_surface(int st, const char *oname, FILE *fp)
|
| 1036 |
{
|
| 1037 |
SURF *snew;
|
| 1038 |
int n;
|
| 1039 |
/* get floating-point arguments */
|
| 1040 |
if (!fscanf(fp, "%d", &n)) return;
|
| 1041 |
while (n-- > 0) fscanf(fp, "%*s");
|
| 1042 |
if (!fscanf(fp, "%d", &n)) return;
|
| 1043 |
while (n-- > 0) fscanf(fp, "%*d");
|
| 1044 |
if (!fscanf(fp, "%d", &n) || n <= 0) return;
|
| 1045 |
snew = (SURF *)malloc(sizeof(SURF) + sizeof(double)*(n-1));
|
| 1046 |
if (snew == NULL) {
|
| 1047 |
fputs(progname, stderr);
|
| 1048 |
fputs(": out of memory in add_surface!\n", stderr);
|
| 1049 |
exit(1);
|
| 1050 |
}
|
| 1051 |
strncpy(snew->sname, oname, sizeof(snew->sname)-1);
|
| 1052 |
snew->sname[sizeof(snew->sname)-1] = '\0';
|
| 1053 |
snew->styp = st;
|
| 1054 |
snew->priv = NULL;
|
| 1055 |
snew->nfargs = n;
|
| 1056 |
for (n = 0; n < snew->nfargs; n++)
|
| 1057 |
if (fscanf(fp, "%lf", &snew->farg[n]) != 1) {
|
| 1058 |
fprintf(stderr, "%s: error reading arguments for '%s'\n",
|
| 1059 |
progname, oname);
|
| 1060 |
exit(1);
|
| 1061 |
}
|
| 1062 |
switch (st) {
|
| 1063 |
case ST_RING:
|
| 1064 |
if (snew->nfargs != 8)
|
| 1065 |
goto badcount;
|
| 1066 |
VCOPY(snew->snrm, snew->farg+3);
|
| 1067 |
if (normalize(snew->snrm) == 0)
|
| 1068 |
goto badnorm;
|
| 1069 |
if (snew->farg[7] < snew->farg[6]) {
|
| 1070 |
double t = snew->farg[7];
|
| 1071 |
snew->farg[7] = snew->farg[6];
|
| 1072 |
snew->farg[6] = t;
|
| 1073 |
}
|
| 1074 |
snew->area = PI*(snew->farg[7]*snew->farg[7] -
|
| 1075 |
snew->farg[6]*snew->farg[6]);
|
| 1076 |
break;
|
| 1077 |
case ST_POLY:
|
| 1078 |
if (snew->nfargs < 9 || snew->nfargs % 3)
|
| 1079 |
goto badcount;
|
| 1080 |
finish_polygon(snew);
|
| 1081 |
break;
|
| 1082 |
case ST_SOURCE:
|
| 1083 |
if (snew->nfargs != 4)
|
| 1084 |
goto badcount;
|
| 1085 |
for (n = 3; n--; ) /* need to reverse "normal" */
|
| 1086 |
snew->snrm[n] = -snew->farg[n];
|
| 1087 |
if (normalize(snew->snrm) == 0)
|
| 1088 |
goto badnorm;
|
| 1089 |
snew->area = sin((PI/180./2.)*snew->farg[3]);
|
| 1090 |
snew->area *= PI*snew->area;
|
| 1091 |
break;
|
| 1092 |
}
|
| 1093 |
if ((snew->area <= FTINY*FTINY) & !(verbose & NOWARN)) {
|
| 1094 |
fprintf(stderr, "%s: warning - zero area for surface '%s'\n",
|
| 1095 |
progname, oname);
|
| 1096 |
free(snew);
|
| 1097 |
return;
|
| 1098 |
}
|
| 1099 |
VSUM(curparams.nrm, curparams.nrm, snew->snrm, snew->area);
|
| 1100 |
snew->next = curparams.slist;
|
| 1101 |
curparams.slist = snew;
|
| 1102 |
curparams.nsurfs++;
|
| 1103 |
return;
|
| 1104 |
badcount:
|
| 1105 |
fprintf(stderr, "%s: bad argument count for surface element '%s'\n",
|
| 1106 |
progname, oname);
|
| 1107 |
exit(1);
|
| 1108 |
badnorm:
|
| 1109 |
fprintf(stderr, "%s: bad orientation for surface element '%s'\n",
|
| 1110 |
progname, oname);
|
| 1111 |
exit(1);
|
| 1112 |
}
|
| 1113 |
|
| 1114 |
/* Parse a receiver object (look for modifiers to add to rcontrib command) */
|
| 1115 |
int
|
| 1116 |
add_recv_object(FILE *fp)
|
| 1117 |
{
|
| 1118 |
int st;
|
| 1119 |
char thismod[128], otype[32], oname[128];
|
| 1120 |
int n;
|
| 1121 |
|
| 1122 |
if (fscanf(fp, "%s %s %s", thismod, otype, oname) != 3)
|
| 1123 |
return(0); /* must have hit EOF! */
|
| 1124 |
if (!strcmp(otype, "alias")) {
|
| 1125 |
fscanf(fp, "%*s"); /* skip alias */
|
| 1126 |
return(0);
|
| 1127 |
}
|
| 1128 |
/* is it a new receiver? */
|
| 1129 |
if ((st = surf_type(otype)) != ST_NONE) {
|
| 1130 |
if (strcmp(thismod, curmod)) {
|
| 1131 |
if (curmod[0]) { /* output last receiver? */
|
| 1132 |
finish_receiver();
|
| 1133 |
clear_params(&curparams, 1);
|
| 1134 |
}
|
| 1135 |
parse_params(&curparams, newparams);
|
| 1136 |
newparams[0] = '\0';
|
| 1137 |
strcpy(curmod, thismod);
|
| 1138 |
}
|
| 1139 |
add_surface(st, oname, fp); /* read & store surface */
|
| 1140 |
return(1);
|
| 1141 |
}
|
| 1142 |
/* else skip arguments */
|
| 1143 |
if (!fscanf(fp, "%d", &n)) return(0);
|
| 1144 |
while (n-- > 0) fscanf(fp, "%*s");
|
| 1145 |
if (!fscanf(fp, "%d", &n)) return(0);
|
| 1146 |
while (n-- > 0) fscanf(fp, "%*d");
|
| 1147 |
if (!fscanf(fp, "%d", &n)) return(0);
|
| 1148 |
while (n-- > 0) fscanf(fp, "%*f");
|
| 1149 |
return(0);
|
| 1150 |
}
|
| 1151 |
|
| 1152 |
/* Parse a sender object */
|
| 1153 |
int
|
| 1154 |
add_send_object(FILE *fp)
|
| 1155 |
{
|
| 1156 |
int st;
|
| 1157 |
char thismod[128], otype[32], oname[128];
|
| 1158 |
int n;
|
| 1159 |
|
| 1160 |
if (fscanf(fp, "%s %s %s", thismod, otype, oname) != 3)
|
| 1161 |
return(0); /* must have hit EOF! */
|
| 1162 |
if (!strcmp(otype, "alias")) {
|
| 1163 |
fscanf(fp, "%*s"); /* skip alias */
|
| 1164 |
return(0);
|
| 1165 |
}
|
| 1166 |
/* is it a new surface? */
|
| 1167 |
if ((st = surf_type(otype)) != ST_NONE) {
|
| 1168 |
if (st == ST_SOURCE) {
|
| 1169 |
fputs(progname, stderr);
|
| 1170 |
fputs(": cannot use source as a sender!\n", stderr);
|
| 1171 |
return(-1);
|
| 1172 |
}
|
| 1173 |
if (strcmp(thismod, curmod)) {
|
| 1174 |
if (curmod[0]) {
|
| 1175 |
fputs(progname, stderr);
|
| 1176 |
fputs(": warning - multiple modifiers in sender\n",
|
| 1177 |
stderr);
|
| 1178 |
}
|
| 1179 |
strcpy(curmod, thismod);
|
| 1180 |
}
|
| 1181 |
parse_params(&curparams, newparams);
|
| 1182 |
newparams[0] = '\0';
|
| 1183 |
add_surface(st, oname, fp); /* read & store surface */
|
| 1184 |
return(0);
|
| 1185 |
}
|
| 1186 |
/* else skip arguments */
|
| 1187 |
if (!fscanf(fp, "%d", &n)) return(0);
|
| 1188 |
while (n-- > 0) fscanf(fp, "%*s");
|
| 1189 |
if (!fscanf(fp, "%d", &n)) return(0);
|
| 1190 |
while (n-- > 0) fscanf(fp, "%*d");
|
| 1191 |
if (!fscanf(fp, "%d", &n)) return(0);
|
| 1192 |
while (n-- > 0) fscanf(fp, "%*f");
|
| 1193 |
return(0);
|
| 1194 |
}
|
| 1195 |
|
| 1196 |
/* Load a Radiance scene using the given callback function for objects */
|
| 1197 |
int
|
| 1198 |
load_scene(const char *inspec, int (*ocb)(FILE *))
|
| 1199 |
{
|
| 1200 |
int rv = 0;
|
| 1201 |
char inpbuf[1024];
|
| 1202 |
FILE *fp;
|
| 1203 |
int c;
|
| 1204 |
|
| 1205 |
if (*inspec == '!')
|
| 1206 |
fp = popen(inspec+1, "r");
|
| 1207 |
else
|
| 1208 |
fp = fopen(inspec, "r");
|
| 1209 |
if (fp == NULL) {
|
| 1210 |
fprintf(stderr, "%s: cannot load '%s'\n", progname, inspec);
|
| 1211 |
return(-1);
|
| 1212 |
}
|
| 1213 |
while ((c = getc(fp)) != EOF) { /* load receiver data */
|
| 1214 |
if (isspace(c)) /* skip leading white space */
|
| 1215 |
continue;
|
| 1216 |
if (c == '!') { /* read from a new command */
|
| 1217 |
inpbuf[0] = c;
|
| 1218 |
if (fgetline(inpbuf+1, sizeof(inpbuf)-1, fp) != NULL) {
|
| 1219 |
if ((c = load_scene(inpbuf, ocb)) < 0)
|
| 1220 |
return(c);
|
| 1221 |
rv += c;
|
| 1222 |
}
|
| 1223 |
continue;
|
| 1224 |
}
|
| 1225 |
if (c == '#') { /* parameters/comment */
|
| 1226 |
if ((c = getc(fp)) == EOF || ungetc(c,fp) == EOF)
|
| 1227 |
break;
|
| 1228 |
if (!isspace(c) && fscanf(fp, "%s", inpbuf) == 1 &&
|
| 1229 |
!strcmp(inpbuf, PARAMSTART)) {
|
| 1230 |
if (fgets(inpbuf, sizeof(inpbuf), fp) != NULL)
|
| 1231 |
strcat(newparams, inpbuf);
|
| 1232 |
continue;
|
| 1233 |
}
|
| 1234 |
while ((c = getc(fp)) != EOF && c != '\n')
|
| 1235 |
; /* else skipping comment */
|
| 1236 |
continue;
|
| 1237 |
}
|
| 1238 |
ungetc(c, fp); /* else check object for receiver */
|
| 1239 |
c = (*ocb)(fp);
|
| 1240 |
if (c < 0)
|
| 1241 |
return(c);
|
| 1242 |
rv += c;
|
| 1243 |
}
|
| 1244 |
/* close our input stream */
|
| 1245 |
c = (*inspec == '!') ? pclose(fp) : fclose(fp);
|
| 1246 |
if (c != 0) {
|
| 1247 |
fprintf(stderr, "%s: error loading '%s'\n", progname, inspec);
|
| 1248 |
return(-1);
|
| 1249 |
}
|
| 1250 |
return(rv);
|
| 1251 |
}
|
| 1252 |
|
| 1253 |
/* Get command arguments and run program */
|
| 1254 |
int
|
| 1255 |
main(int argc, char *argv[])
|
| 1256 |
{
|
| 1257 |
char fmtopt[6] = "-faa"; /* default output is ASCII */
|
| 1258 |
char *xrs=NULL, *yrs=NULL, *ldopt=NULL;
|
| 1259 |
char *iropt = NULL;
|
| 1260 |
char *sendfn;
|
| 1261 |
char sampcntbuf[32], nsbinbuf[32], binjitbuf[32];
|
| 1262 |
FILE *rcfp;
|
| 1263 |
int nsbins;
|
| 1264 |
int a, i;
|
| 1265 |
/* set global progname */
|
| 1266 |
fixargv0(argv[0]);
|
| 1267 |
/* screen rcontrib options */
|
| 1268 |
for (a = 1; a < argc-2; a++) {
|
| 1269 |
int na;
|
| 1270 |
/* check for argument expansion */
|
| 1271 |
while ((na = expandarg(&argc, &argv, a)) > 0)
|
| 1272 |
;
|
| 1273 |
if (na < 0) {
|
| 1274 |
fprintf(stderr, "%s: cannot expand '%s'\n",
|
| 1275 |
progname, argv[a]);
|
| 1276 |
return(1);
|
| 1277 |
}
|
| 1278 |
if (argv[a][0] != '-' || !argv[a][1])
|
| 1279 |
break;
|
| 1280 |
na = 1;
|
| 1281 |
switch (argv[a][1]) { /* !! Keep consistent !! */
|
| 1282 |
case 'v': /* verbose mode */
|
| 1283 |
verbose ^= VERBO;
|
| 1284 |
na = 0;
|
| 1285 |
continue;
|
| 1286 |
case 'f': /* special case for -fo, -ff, etc. */
|
| 1287 |
switch (argv[a][2]) {
|
| 1288 |
case '\0': /* cal file */
|
| 1289 |
na = 2;
|
| 1290 |
break;
|
| 1291 |
case 'o': /* force output */
|
| 1292 |
goto userr;
|
| 1293 |
case 'a': /* output format */
|
| 1294 |
case 'f':
|
| 1295 |
case 'd':
|
| 1296 |
case 'c':
|
| 1297 |
if (!(fmtopt[3] = argv[a][3]))
|
| 1298 |
fmtopt[3] = argv[a][2];
|
| 1299 |
fmtopt[2] = argv[a][2];
|
| 1300 |
na = 0;
|
| 1301 |
continue; /* will pass later */
|
| 1302 |
default:
|
| 1303 |
goto userr;
|
| 1304 |
}
|
| 1305 |
break;
|
| 1306 |
case 'x': /* x-resolution */
|
| 1307 |
xrs = argv[++a];
|
| 1308 |
na = 0;
|
| 1309 |
continue;
|
| 1310 |
case 'y': /* y-resolution */
|
| 1311 |
yrs = argv[++a];
|
| 1312 |
na = 0;
|
| 1313 |
continue;
|
| 1314 |
case 'c': /* spectral sampling or count */
|
| 1315 |
switch (argv[a][2]) {
|
| 1316 |
case 's':
|
| 1317 |
na = 2;
|
| 1318 |
break;
|
| 1319 |
case 'w':
|
| 1320 |
na = 3;
|
| 1321 |
break;
|
| 1322 |
case '\0':
|
| 1323 |
sampcnt = atoi(argv[++a]);
|
| 1324 |
if (sampcnt <= 0)
|
| 1325 |
goto userr;
|
| 1326 |
na = 0; /* we re-add this later */
|
| 1327 |
continue;
|
| 1328 |
}
|
| 1329 |
break;
|
| 1330 |
case 'I': /* only for pass-through mode */
|
| 1331 |
case 'i':
|
| 1332 |
iropt = argv[a];
|
| 1333 |
na = 0;
|
| 1334 |
continue;
|
| 1335 |
case 'w': /* options without arguments */
|
| 1336 |
if (!argv[a][2])
|
| 1337 |
verbose ^= NOWARN;
|
| 1338 |
else if (strchr("+1tTyY", argv[a][2]) != NULL)
|
| 1339 |
verbose &= ~NOWARN;
|
| 1340 |
else
|
| 1341 |
verbose |= NOWARN;
|
| 1342 |
break;
|
| 1343 |
case 'V':
|
| 1344 |
case 'u':
|
| 1345 |
case 'h':
|
| 1346 |
case 'r':
|
| 1347 |
break;
|
| 1348 |
case 'n': /* options with 1 argument */
|
| 1349 |
case 's':
|
| 1350 |
case 'o':
|
| 1351 |
case 't':
|
| 1352 |
case 'e':
|
| 1353 |
na = 2;
|
| 1354 |
break;
|
| 1355 |
case 'b': /* special case */
|
| 1356 |
if (argv[a][2] == 'j') {
|
| 1357 |
binjitter = argv[++a];
|
| 1358 |
na = 0;
|
| 1359 |
continue;
|
| 1360 |
}
|
| 1361 |
if (argv[a][2] != 'v') goto userr;
|
| 1362 |
break;
|
| 1363 |
case 'l': /* special case */
|
| 1364 |
if (argv[a][2] == 'd') {
|
| 1365 |
ldopt = argv[a];
|
| 1366 |
na = 0;
|
| 1367 |
continue;
|
| 1368 |
}
|
| 1369 |
na = 2;
|
| 1370 |
break;
|
| 1371 |
case 'd': /* special case */
|
| 1372 |
if (argv[a][2] != 'v') na = 2;
|
| 1373 |
break;
|
| 1374 |
case 'a': /* special case */
|
| 1375 |
if (argv[a][2] == 'p') {
|
| 1376 |
na = 2; /* photon map [+ bandwidth(s)] */
|
| 1377 |
if (a < argc-3 && atoi(argv[a+1]) > 0)
|
| 1378 |
na += 1 + (a < argc-4 && atoi(argv[a+2]) > 0);
|
| 1379 |
} else
|
| 1380 |
na = (argv[a][2] == 'v') ? 4 : 2;
|
| 1381 |
break;
|
| 1382 |
case 'm': /* special case */
|
| 1383 |
if (!argv[a][2]) goto userr;
|
| 1384 |
na = (argv[a][2] == 'e') | (argv[a][2] == 'a') ? 4 : 2;
|
| 1385 |
break;
|
| 1386 |
default: /* anything else is verbotten */
|
| 1387 |
goto userr;
|
| 1388 |
}
|
| 1389 |
if (na <= 0) continue;
|
| 1390 |
CHECKARGC(na); /* pass on option */
|
| 1391 |
rcarg[nrcargs++] = argv[a];
|
| 1392 |
while (--na) /* + arguments if any */
|
| 1393 |
rcarg[nrcargs++] = argv[++a];
|
| 1394 |
}
|
| 1395 |
if (a > argc-2)
|
| 1396 |
goto userr; /* check at end of options */
|
| 1397 |
sendfn = argv[a++]; /* assign sender & receiver inputs */
|
| 1398 |
if (sendfn[0] == '-') { /* user wants pass-through mode? */
|
| 1399 |
if (sendfn[1]) goto userr;
|
| 1400 |
sendfn = NULL;
|
| 1401 |
if (iropt) {
|
| 1402 |
CHECKARGC(1);
|
| 1403 |
rcarg[nrcargs++] = iropt;
|
| 1404 |
}
|
| 1405 |
if (xrs) {
|
| 1406 |
CHECKARGC(2);
|
| 1407 |
rcarg[nrcargs++] = "-x";
|
| 1408 |
rcarg[nrcargs++] = xrs;
|
| 1409 |
}
|
| 1410 |
if (yrs) {
|
| 1411 |
CHECKARGC(2);
|
| 1412 |
rcarg[nrcargs++] = "-y";
|
| 1413 |
rcarg[nrcargs++] = yrs;
|
| 1414 |
}
|
| 1415 |
if (ldopt) {
|
| 1416 |
CHECKARGC(1);
|
| 1417 |
rcarg[nrcargs++] = ldopt;
|
| 1418 |
}
|
| 1419 |
if (sampcnt <= 0) sampcnt = 1;
|
| 1420 |
} else { /* else in sampling mode */
|
| 1421 |
if (iropt) {
|
| 1422 |
fputs(progname, stderr);
|
| 1423 |
fputs(": -i, -I supported for pass-through only\n", stderr);
|
| 1424 |
return(1);
|
| 1425 |
}
|
| 1426 |
#ifdef SMLFLT
|
| 1427 |
fmtopt[2] = 'f';
|
| 1428 |
#else
|
| 1429 |
fmtopt[2] = 'd';
|
| 1430 |
#endif
|
| 1431 |
if (sampcnt <= 0) sampcnt = 10000;
|
| 1432 |
}
|
| 1433 |
sprintf(sampcntbuf, "%d", sampcnt);
|
| 1434 |
CHECKARGC(3); /* add our format & sample count */
|
| 1435 |
rcarg[nrcargs++] = fmtopt;
|
| 1436 |
rcarg[nrcargs++] = "-c";
|
| 1437 |
rcarg[nrcargs++] = sampcntbuf;
|
| 1438 |
/* add receiver arguments to rcontrib */
|
| 1439 |
if (load_scene(argv[a], add_recv_object) < 0)
|
| 1440 |
return(1);
|
| 1441 |
finish_receiver();
|
| 1442 |
if (sendfn == NULL) { /* pass-through mode? */
|
| 1443 |
CHECKARGC(1); /* add octree */
|
| 1444 |
rcarg[nrcargs++] = oconv_command(argc-a, argv+a);
|
| 1445 |
rcarg[nrcargs] = NULL;
|
| 1446 |
return(my_exec(rcarg)); /* rcontrib does everything */
|
| 1447 |
}
|
| 1448 |
clear_params(&curparams, 0); /* else load sender surface & params */
|
| 1449 |
curmod[0] = '\0';
|
| 1450 |
if (load_scene(sendfn, add_send_object) < 0)
|
| 1451 |
return(1);
|
| 1452 |
if ((nsbins = prepare_sampler(&curparams)) <= 0)
|
| 1453 |
return(1);
|
| 1454 |
CHECKARGC(3); /* add row count and octree */
|
| 1455 |
rcarg[nrcargs++] = "-y";
|
| 1456 |
sprintf(nsbinbuf, "%d", nsbins);
|
| 1457 |
rcarg[nrcargs++] = nsbinbuf;
|
| 1458 |
rcarg[nrcargs++] = oconv_command(argc-a, argv+a);
|
| 1459 |
rcarg[nrcargs] = NULL;
|
| 1460 |
/* open pipe to rcontrib process */
|
| 1461 |
if ((rcfp = popen_arglist(rcarg, "w")) == NULL)
|
| 1462 |
return(1);
|
| 1463 |
SET_FILE_BINARY(rcfp);
|
| 1464 |
#ifdef getc_unlocked
|
| 1465 |
flockfile(rcfp);
|
| 1466 |
#endif
|
| 1467 |
if (verbose & VERBO) {
|
| 1468 |
fprintf(stderr, "%s: sampling %d directions", progname, nsbins);
|
| 1469 |
if (curparams.nsurfs > 1)
|
| 1470 |
fprintf(stderr, " (%d elements)\n", curparams.nsurfs);
|
| 1471 |
else
|
| 1472 |
fputc('\n', stderr);
|
| 1473 |
}
|
| 1474 |
for (i = 0; i < nsbins; i++) /* send rcontrib ray samples */
|
| 1475 |
if (!(*curparams.sample_basis)(&curparams, i, rcfp))
|
| 1476 |
return(1);
|
| 1477 |
return(pclose_al(rcfp) < 0); /* all finished! */
|
| 1478 |
userr:
|
| 1479 |
if (a < argc-2)
|
| 1480 |
fprintf(stderr, "%s: unsupported option '%s'\n", progname, argv[a]);
|
| 1481 |
fprintf(stderr, "Usage: %s [-v][-bj frac][rcontrib options] sender.rad receiver.rad [-i system.oct] [system.rad ..]\n",
|
| 1482 |
progname);
|
| 1483 |
return(1);
|
| 1484 |
}
|
