| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: rfluxmtx.c,v 2.14 2014/08/06 02:38:24 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Calculate flux transfer matrix or matrices using rcontrib |
| 6 |
*/ |
| 7 |
|
| 8 |
#include "copyright.h" |
| 9 |
|
| 10 |
#include <ctype.h> |
| 11 |
#include <stdlib.h> |
| 12 |
#include "rtio.h" |
| 13 |
#include "rtmath.h" |
| 14 |
#include "rtprocess.h" |
| 15 |
#include "bsdf.h" |
| 16 |
#include "bsdf_m.h" |
| 17 |
#include "random.h" |
| 18 |
#include "triangulate.h" |
| 19 |
#include "platform.h" |
| 20 |
|
| 21 |
#ifdef getc_unlocked /* avoid horrendous overhead of flockfile */ |
| 22 |
#undef getc |
| 23 |
#define getc getc_unlocked |
| 24 |
#endif |
| 25 |
|
| 26 |
#ifdef _WIN32 |
| 27 |
#define SPECIALS " \t\"$*?" |
| 28 |
#define QUOTCHAR '"' |
| 29 |
#else |
| 30 |
#define SPECIALS " \t\n'\"()${}*?[];|&" |
| 31 |
#define QUOTCHAR '\'' |
| 32 |
#define ALTQUOT '"' |
| 33 |
#endif |
| 34 |
|
| 35 |
#define MAXRCARG 512 |
| 36 |
|
| 37 |
char *progname; /* global argv[0] */ |
| 38 |
|
| 39 |
int verbose = 0; /* verbose mode? */ |
| 40 |
|
| 41 |
char *rcarg[MAXRCARG+1] = {"rcontrib", "-fo+"}; |
| 42 |
int nrcargs = 2; |
| 43 |
|
| 44 |
const char overflowerr[] = "%s: too many arguments!\n"; |
| 45 |
|
| 46 |
#define CHECKARGC(n) if (nrcargs >= MAXRCARG-(n)) \ |
| 47 |
{ fprintf(stderr, overflowerr, progname); exit(1); } |
| 48 |
|
| 49 |
int sampcnt = 0; /* sample count (0==unset) */ |
| 50 |
|
| 51 |
char *reinhfn = "reinhartb.cal"; |
| 52 |
char *shirchiufn = "disk2square.cal"; |
| 53 |
char *kfullfn = "klems_full.cal"; |
| 54 |
char *khalffn = "klems_half.cal"; |
| 55 |
char *kquarterfn = "klems_quarter.cal"; |
| 56 |
|
| 57 |
/* string indicating parameters */ |
| 58 |
const char PARAMSTART[] = "@rfluxmtx"; |
| 59 |
|
| 60 |
/* surface type IDs */ |
| 61 |
#define ST_NONE 0 |
| 62 |
#define ST_POLY 1 |
| 63 |
#define ST_RING 2 |
| 64 |
#define ST_SOURCE 3 |
| 65 |
|
| 66 |
typedef struct surf_s { |
| 67 |
struct surf_s *next; /* next surface in list */ |
| 68 |
void *priv; /* private data (malloc'ed) */ |
| 69 |
char sname[32]; /* surface name */ |
| 70 |
FVECT snrm; /* surface normal */ |
| 71 |
double area; /* surface area / proj. solid angle */ |
| 72 |
short styp; /* surface type */ |
| 73 |
short nfargs; /* number of real arguments */ |
| 74 |
double farg[1]; /* real values (extends struct) */ |
| 75 |
} SURF; /* surface structure */ |
| 76 |
|
| 77 |
typedef struct { |
| 78 |
FVECT uva[2]; /* tangent axes */ |
| 79 |
int ntris; /* number of triangles */ |
| 80 |
struct ptri { |
| 81 |
float afrac; /* fraction of total area */ |
| 82 |
short vndx[3]; /* vertex indices */ |
| 83 |
} tri[1]; /* triangle array (extends struct) */ |
| 84 |
} POLYTRIS; /* triangulated polygon */ |
| 85 |
|
| 86 |
typedef struct param_s { |
| 87 |
char hemis[32]; /* hemispherical sampling spec. */ |
| 88 |
int hsiz; /* hemisphere basis size */ |
| 89 |
int nsurfs; /* number of surfaces */ |
| 90 |
SURF *slist; /* list of surfaces */ |
| 91 |
FVECT vup; /* up vector (zero if unset) */ |
| 92 |
FVECT nrm; /* average normal direction */ |
| 93 |
FVECT udir, vdir; /* v-up tangent axes */ |
| 94 |
char *outfn; /* output file name (receiver) */ |
| 95 |
int (*sample_basis)(struct param_s *p, int, FILE *); |
| 96 |
} PARAMS; /* sender/receiver parameters */ |
| 97 |
|
| 98 |
PARAMS curparams; |
| 99 |
char curmod[128]; |
| 100 |
char newparams[1024]; |
| 101 |
|
| 102 |
typedef int SURFSAMP(FVECT, SURF *, double); |
| 103 |
|
| 104 |
static SURFSAMP ssamp_bad, ssamp_poly, ssamp_ring; |
| 105 |
|
| 106 |
SURFSAMP *orig_in_surf[4] = { |
| 107 |
ssamp_bad, ssamp_poly, ssamp_ring, ssamp_bad |
| 108 |
}; |
| 109 |
|
| 110 |
/* Clear parameter set */ |
| 111 |
static void |
| 112 |
clear_params(PARAMS *p, int reset_only) |
| 113 |
{ |
| 114 |
while (p->slist != NULL) { |
| 115 |
SURF *sdel = p->slist; |
| 116 |
p->slist = sdel->next; |
| 117 |
if (sdel->priv != NULL) |
| 118 |
free(sdel->priv); |
| 119 |
free(sdel); |
| 120 |
} |
| 121 |
if (reset_only) { |
| 122 |
p->nsurfs = 0; |
| 123 |
memset(p->nrm, 0, sizeof(FVECT)); |
| 124 |
memset(p->vup, 0, sizeof(FVECT)); |
| 125 |
p->outfn = NULL; |
| 126 |
return; |
| 127 |
} |
| 128 |
memset(p, 0, sizeof(PARAMS)); |
| 129 |
} |
| 130 |
|
| 131 |
/* Get surface type from name */ |
| 132 |
static int |
| 133 |
surf_type(const char *otype) |
| 134 |
{ |
| 135 |
if (!strcmp(otype, "polygon")) |
| 136 |
return(ST_POLY); |
| 137 |
if (!strcmp(otype, "ring")) |
| 138 |
return(ST_RING); |
| 139 |
if (!strcmp(otype, "source")) |
| 140 |
return(ST_SOURCE); |
| 141 |
return(ST_NONE); |
| 142 |
} |
| 143 |
|
| 144 |
/* Add arguments to oconv command */ |
| 145 |
static char * |
| 146 |
oconv_command(int ac, char *av[]) |
| 147 |
{ |
| 148 |
static char oconvbuf[2048] = "!oconv -f "; |
| 149 |
char *cp = oconvbuf + 10; |
| 150 |
char *recv = *av++; |
| 151 |
|
| 152 |
if (ac-- <= 0) |
| 153 |
return(NULL); |
| 154 |
while (ac-- > 0) { |
| 155 |
strcpy(cp, *av++); |
| 156 |
while (*cp) cp++; |
| 157 |
*cp++ = ' '; |
| 158 |
if (cp >= oconvbuf+(sizeof(oconvbuf)-32)) { |
| 159 |
fputs(progname, stderr); |
| 160 |
fputs(": too many file arguments!\n", stderr); |
| 161 |
exit(1); |
| 162 |
} |
| 163 |
} |
| 164 |
strcpy(cp, recv); /* receiver goes last */ |
| 165 |
return(oconvbuf); |
| 166 |
} |
| 167 |
|
| 168 |
/* Check if any of the characters in str2 are found in str1 */ |
| 169 |
static int |
| 170 |
matchany(const char *str1, const char *str2) |
| 171 |
{ |
| 172 |
while (*str1) { |
| 173 |
const char *cp = str2; |
| 174 |
while (*cp) |
| 175 |
if (*cp++ == *str1) |
| 176 |
return(*str1); |
| 177 |
++str1; |
| 178 |
} |
| 179 |
return(0); |
| 180 |
} |
| 181 |
|
| 182 |
|
| 183 |
/* Convert a set of arguments into a command line for pipe() or system() */ |
| 184 |
static char * |
| 185 |
convert_commandline(char *cmd, const int len, char *av[]) |
| 186 |
{ |
| 187 |
int match; |
| 188 |
char *cp; |
| 189 |
|
| 190 |
for (cp = cmd; *av != NULL; av++) { |
| 191 |
const int n = strlen(*av); |
| 192 |
if (cp+n >= cmd+(len-3)) { |
| 193 |
fputs(progname, stderr); |
| 194 |
return(NULL); |
| 195 |
} |
| 196 |
if ((match = matchany(*av, SPECIALS))) { |
| 197 |
const int quote = |
| 198 |
#ifdef ALTQUOT |
| 199 |
(match == QUOTCHAR) ? ALTQUOT : |
| 200 |
#endif |
| 201 |
QUOTCHAR; |
| 202 |
*cp++ = quote; |
| 203 |
strcpy(cp, *av); |
| 204 |
cp += n; |
| 205 |
*cp++ = quote; |
| 206 |
} else { |
| 207 |
strcpy(cp, *av); |
| 208 |
cp += n; |
| 209 |
} |
| 210 |
*cp++ = ' '; |
| 211 |
} |
| 212 |
if (cp <= cmd) |
| 213 |
return(NULL); |
| 214 |
*--cp = '\0'; |
| 215 |
return(cmd); |
| 216 |
} |
| 217 |
|
| 218 |
/* Open a pipe to/from a command given as an argument list */ |
| 219 |
static FILE * |
| 220 |
popen_arglist(char *av[], char *mode) |
| 221 |
{ |
| 222 |
char cmd[10240]; |
| 223 |
|
| 224 |
if (!convert_commandline(cmd, sizeof(cmd), av)) { |
| 225 |
fputs(progname, stderr); |
| 226 |
fputs(": command line too long in popen_arglist()\n", stderr); |
| 227 |
return(NULL); |
| 228 |
} |
| 229 |
if (verbose) |
| 230 |
fprintf(stderr, "%s: opening pipe %s: %s\n", |
| 231 |
progname, (*mode=='w') ? "to" : "from", cmd); |
| 232 |
return(popen(cmd, mode)); |
| 233 |
} |
| 234 |
|
| 235 |
#ifdef _WIN32 |
| 236 |
/* Execute system command (Windows version) */ |
| 237 |
static int |
| 238 |
my_exec(char *av[]) |
| 239 |
{ |
| 240 |
char cmd[10240]; |
| 241 |
|
| 242 |
if (!convert_commandline(cmd, sizeof(cmd), av)) { |
| 243 |
fputs(progname, stderr); |
| 244 |
fputs(": command line too long in my_exec()\n", stderr); |
| 245 |
return(1); |
| 246 |
} |
| 247 |
if (verbose) |
| 248 |
fprintf(stderr, "%s: running: %s\n", progname, cmd); |
| 249 |
return(system(cmd)); |
| 250 |
} |
| 251 |
#else |
| 252 |
/* Execute system command in our stead (Unix version) */ |
| 253 |
static int |
| 254 |
my_exec(char *av[]) |
| 255 |
{ |
| 256 |
char *compath; |
| 257 |
|
| 258 |
if ((compath = getpath((char *)av[0], getenv("PATH"), X_OK)) == NULL) { |
| 259 |
fprintf(stderr, "%s: cannot locate %s\n", progname, av[0]); |
| 260 |
return(1); |
| 261 |
} |
| 262 |
if (verbose) { |
| 263 |
char cmd[4096]; |
| 264 |
if (!convert_commandline(cmd, sizeof(cmd), av)) |
| 265 |
strcpy(cmd, "COMMAND TOO LONG TO SHOW"); |
| 266 |
fprintf(stderr, "%s: running: %s\n", progname, cmd); |
| 267 |
} |
| 268 |
execv(compath, av); /* successful call never returns */ |
| 269 |
perror(compath); |
| 270 |
return(1); |
| 271 |
} |
| 272 |
#endif |
| 273 |
|
| 274 |
/* Get normalized direction vector from string specification */ |
| 275 |
static int |
| 276 |
get_direction(FVECT dv, const char *s) |
| 277 |
{ |
| 278 |
int sign = 1; |
| 279 |
int axis = 0; |
| 280 |
|
| 281 |
memset(dv, 0, sizeof(FVECT)); |
| 282 |
nextchar: |
| 283 |
switch (*s) { |
| 284 |
case '+': |
| 285 |
++s; |
| 286 |
goto nextchar; |
| 287 |
case '-': |
| 288 |
sign = -sign; |
| 289 |
++s; |
| 290 |
goto nextchar; |
| 291 |
case 'z': |
| 292 |
case 'Z': |
| 293 |
++axis; |
| 294 |
case 'y': |
| 295 |
case 'Y': |
| 296 |
++axis; |
| 297 |
case 'x': |
| 298 |
case 'X': |
| 299 |
dv[axis] = sign; |
| 300 |
return(!s[1] | isspace(s[1])); |
| 301 |
default: |
| 302 |
break; |
| 303 |
} |
| 304 |
#ifdef SMLFLT |
| 305 |
if (sscanf(s, "%f,%f,%f", &dv[0], &dv[1], &dv[2]) != 3) |
| 306 |
#else |
| 307 |
if (sscanf(s, "%lf,%lf,%lf", &dv[0], &dv[1], &dv[2]) != 3) |
| 308 |
#endif |
| 309 |
return(0); |
| 310 |
dv[0] *= (RREAL)sign; |
| 311 |
return(normalize(dv) > 0); |
| 312 |
} |
| 313 |
|
| 314 |
/* Parse program parameters (directives) */ |
| 315 |
static int |
| 316 |
parse_params(PARAMS *p, char *pargs) |
| 317 |
{ |
| 318 |
char *cp = pargs; |
| 319 |
int nparams = 0; |
| 320 |
int i; |
| 321 |
|
| 322 |
for ( ; ; ) { |
| 323 |
switch (*cp++) { |
| 324 |
case 'h': |
| 325 |
if (*cp++ != '=') |
| 326 |
break; |
| 327 |
p->hsiz = 0; |
| 328 |
i = 0; |
| 329 |
while (*cp && !isspace(*cp)) { |
| 330 |
if (isdigit(*cp)) |
| 331 |
p->hsiz = 10*p->hsiz + *cp - '0'; |
| 332 |
p->hemis[i++] = *cp++; |
| 333 |
} |
| 334 |
if (!i) |
| 335 |
break; |
| 336 |
p->hemis[i] = '\0'; |
| 337 |
p->hsiz += !p->hsiz; |
| 338 |
++nparams; |
| 339 |
continue; |
| 340 |
case 'u': |
| 341 |
if (*cp++ != '=') |
| 342 |
break; |
| 343 |
if (!get_direction(p->vup, cp)) |
| 344 |
break; |
| 345 |
while (*cp && !isspace(*cp++)) |
| 346 |
; |
| 347 |
++nparams; |
| 348 |
continue; |
| 349 |
case 'o': |
| 350 |
if (*cp++ != '=') |
| 351 |
break; |
| 352 |
i = 0; |
| 353 |
while (*cp && !isspace(*cp++)) |
| 354 |
i++; |
| 355 |
if (!i) |
| 356 |
break; |
| 357 |
*--cp = '\0'; |
| 358 |
p->outfn = savqstr(cp-i); |
| 359 |
*cp++ = ' '; |
| 360 |
++nparams; |
| 361 |
continue; |
| 362 |
case ' ': |
| 363 |
case '\t': |
| 364 |
case '\r': |
| 365 |
continue; |
| 366 |
case '\n': |
| 367 |
case '\0': |
| 368 |
return(nparams); |
| 369 |
default: |
| 370 |
break; |
| 371 |
} |
| 372 |
break; |
| 373 |
} |
| 374 |
fprintf(stderr, "%s: bad parameter string: %s", progname, pargs); |
| 375 |
exit(1); |
| 376 |
return(-1); /* pro forma return */ |
| 377 |
} |
| 378 |
|
| 379 |
/* Add receiver arguments (directives) corresponding to the current modifier */ |
| 380 |
static void |
| 381 |
finish_receiver(void) |
| 382 |
{ |
| 383 |
char sbuf[256]; |
| 384 |
int uniform = 0; |
| 385 |
char *calfn = NULL; |
| 386 |
char *params = NULL; |
| 387 |
char *binv = NULL; |
| 388 |
char *binf = NULL; |
| 389 |
char *nbins = NULL; |
| 390 |
|
| 391 |
if (!curmod[0]) { |
| 392 |
fputs(progname, stderr); |
| 393 |
fputs(": missing receiver surface!\n", stderr); |
| 394 |
exit(1); |
| 395 |
} |
| 396 |
if (curparams.outfn != NULL) { /* add output file spec. */ |
| 397 |
CHECKARGC(2); |
| 398 |
rcarg[nrcargs++] = "-o"; |
| 399 |
rcarg[nrcargs++] = curparams.outfn; |
| 400 |
} |
| 401 |
/* check arguments */ |
| 402 |
if (!curparams.hemis[0]) { |
| 403 |
fputs(progname, stderr); |
| 404 |
fputs(": missing hemisphere sampling type!\n", stderr); |
| 405 |
exit(1); |
| 406 |
} |
| 407 |
if (normalize(curparams.nrm) == 0) { |
| 408 |
fputs(progname, stderr); |
| 409 |
fputs(": undefined normal for hemisphere sampling\n", stderr); |
| 410 |
exit(1); |
| 411 |
} |
| 412 |
if (normalize(curparams.vup) == 0) { |
| 413 |
if (fabs(curparams.nrm[2]) < .7) |
| 414 |
curparams.vup[2] = 1; |
| 415 |
else |
| 416 |
curparams.vup[1] = 1; |
| 417 |
} |
| 418 |
/* determine sample type/bin */ |
| 419 |
if (tolower(curparams.hemis[0]) == 'u' | curparams.hemis[0] == '1') { |
| 420 |
binv = "0"; /* uniform sampling -- one bin */ |
| 421 |
uniform = 1; |
| 422 |
} else if (tolower(curparams.hemis[0]) == 's' && |
| 423 |
tolower(curparams.hemis[1]) == 'c') { |
| 424 |
/* assign parameters */ |
| 425 |
if (curparams.hsiz <= 1) { |
| 426 |
fputs(progname, stderr); |
| 427 |
fputs(": missing size for Shirley-Chiu sampling!\n", stderr); |
| 428 |
exit(1); |
| 429 |
} |
| 430 |
calfn = shirchiufn; shirchiufn = NULL; |
| 431 |
sprintf(sbuf, "SCdim=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g", |
| 432 |
curparams.hsiz, |
| 433 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
| 434 |
curparams.vup[0], curparams.vup[1], curparams.vup[2]); |
| 435 |
params = savqstr(sbuf); |
| 436 |
binv = "scbin"; |
| 437 |
nbins = "SCdim*SCdim"; |
| 438 |
} else if ((tolower(curparams.hemis[0]) == 'r') | |
| 439 |
(tolower(curparams.hemis[0]) == 't')) { |
| 440 |
calfn = reinhfn; reinhfn = NULL; |
| 441 |
sprintf(sbuf, "MF=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g", |
| 442 |
curparams.hsiz, |
| 443 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
| 444 |
curparams.vup[0], curparams.vup[1], curparams.vup[2]); |
| 445 |
params = savqstr(sbuf); |
| 446 |
binv = "rbin"; |
| 447 |
nbins = "Nrbins"; |
| 448 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
| 449 |
!curparams.hemis[1] | |
| 450 |
(tolower(curparams.hemis[1]) == 'f') | |
| 451 |
(curparams.hemis[1] == '1')) { |
| 452 |
calfn = kfullfn; kfullfn = NULL; |
| 453 |
binf = "kbin"; |
| 454 |
nbins = "Nkbins"; |
| 455 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
| 456 |
(tolower(curparams.hemis[1]) == 'h') | |
| 457 |
(curparams.hemis[1] == '2')) { |
| 458 |
calfn = khalffn; khalffn = NULL; |
| 459 |
binf = "khbin"; |
| 460 |
nbins = "Nkhbins"; |
| 461 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
| 462 |
(tolower(curparams.hemis[1]) == 'q') | |
| 463 |
(curparams.hemis[1] == '4')) { |
| 464 |
calfn = kquarterfn; kquarterfn = NULL; |
| 465 |
binf = "kqbin"; |
| 466 |
nbins = "Nkqbins"; |
| 467 |
} else { |
| 468 |
fprintf(stderr, "%s: unrecognized hemisphere sampling: h=%s\n", |
| 469 |
progname, curparams.hemis); |
| 470 |
exit(1); |
| 471 |
} |
| 472 |
if (!uniform & (curparams.slist->styp == ST_SOURCE)) { |
| 473 |
SURF *sp; |
| 474 |
for (sp = curparams.slist; sp != NULL; sp = sp->next) |
| 475 |
if (fabs(sp->area - PI) > 1e-3) { |
| 476 |
fprintf(stderr, "%s: source '%s' must be 180-degrees\n", |
| 477 |
progname, sp->sname); |
| 478 |
exit(1); |
| 479 |
} |
| 480 |
} |
| 481 |
if (calfn != NULL) { /* add cal file if needed */ |
| 482 |
CHECKARGC(2); |
| 483 |
rcarg[nrcargs++] = "-f"; |
| 484 |
rcarg[nrcargs++] = calfn; |
| 485 |
} |
| 486 |
if (params != NULL) { /* parameters _after_ cal file */ |
| 487 |
CHECKARGC(2); |
| 488 |
rcarg[nrcargs++] = "-p"; |
| 489 |
rcarg[nrcargs++] = params; |
| 490 |
} |
| 491 |
if (nbins != NULL) { /* add #bins if set */ |
| 492 |
CHECKARGC(2); |
| 493 |
rcarg[nrcargs++] = "-bn"; |
| 494 |
rcarg[nrcargs++] = nbins; |
| 495 |
} |
| 496 |
if (binv != NULL) { |
| 497 |
CHECKARGC(2); /* assign bin variable */ |
| 498 |
rcarg[nrcargs++] = "-b"; |
| 499 |
rcarg[nrcargs++] = binv; |
| 500 |
} else if (binf != NULL) { |
| 501 |
CHECKARGC(2); /* assign bin function */ |
| 502 |
rcarg[nrcargs++] = "-b"; |
| 503 |
sprintf(sbuf, "%s(%g,%g,%g,%g,%g,%g)", binf, |
| 504 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
| 505 |
curparams.vup[0], curparams.vup[1], curparams.vup[2]); |
| 506 |
rcarg[nrcargs++] = savqstr(sbuf); |
| 507 |
} |
| 508 |
CHECKARGC(2); /* modifier argument goes last */ |
| 509 |
rcarg[nrcargs++] = "-m"; |
| 510 |
rcarg[nrcargs++] = savqstr(curmod); |
| 511 |
} |
| 512 |
|
| 513 |
/* Make randomly oriented tangent plane axes for given normal direction */ |
| 514 |
static void |
| 515 |
make_axes(FVECT uva[2], const FVECT nrm) |
| 516 |
{ |
| 517 |
int i; |
| 518 |
|
| 519 |
uva[1][0] = 0.5 - frandom(); |
| 520 |
uva[1][1] = 0.5 - frandom(); |
| 521 |
uva[1][2] = 0.5 - frandom(); |
| 522 |
for (i = 3; i--; ) |
| 523 |
if ((-0.6 < nrm[i]) & (nrm[i] < 0.6)) |
| 524 |
break; |
| 525 |
if (i < 0) { |
| 526 |
fputs(progname, stderr); |
| 527 |
fputs(": bad surface normal in make_axes!\n", stderr); |
| 528 |
exit(1); |
| 529 |
} |
| 530 |
uva[1][i] = 1.0; |
| 531 |
VCROSS(uva[0], uva[1], nrm); |
| 532 |
normalize(uva[0]); |
| 533 |
VCROSS(uva[1], nrm, uva[0]); |
| 534 |
} |
| 535 |
|
| 536 |
/* Illegal sender surfaces end up here */ |
| 537 |
static int |
| 538 |
ssamp_bad(FVECT orig, SURF *sp, double x) |
| 539 |
{ |
| 540 |
fprintf(stderr, "%s: illegal sender surface '%s'\n", |
| 541 |
progname, sp->sname); |
| 542 |
return(0); |
| 543 |
} |
| 544 |
|
| 545 |
/* Generate origin on ring surface from uniform random variable */ |
| 546 |
static int |
| 547 |
ssamp_ring(FVECT orig, SURF *sp, double x) |
| 548 |
{ |
| 549 |
FVECT *uva = (FVECT *)sp->priv; |
| 550 |
double samp2[2]; |
| 551 |
double uv[2]; |
| 552 |
int i; |
| 553 |
|
| 554 |
if (uva == NULL) { /* need tangent axes */ |
| 555 |
uva = (FVECT *)malloc(sizeof(FVECT)*2); |
| 556 |
if (uva == NULL) { |
| 557 |
fputs(progname, stderr); |
| 558 |
fputs(": out of memory in ssamp_ring!\n", stderr); |
| 559 |
return(0); |
| 560 |
} |
| 561 |
make_axes(uva, sp->snrm); |
| 562 |
sp->priv = (void *)uva; |
| 563 |
} |
| 564 |
SDmultiSamp(samp2, 2, x); |
| 565 |
samp2[0] = sqrt(samp2[0]*sp->area*(1./PI) + sp->farg[6]*sp->farg[6]); |
| 566 |
samp2[1] *= 2.*PI; |
| 567 |
uv[0] = samp2[0]*tcos(samp2[1]); |
| 568 |
uv[1] = samp2[0]*tsin(samp2[1]); |
| 569 |
for (i = 3; i--; ) |
| 570 |
orig[i] = sp->farg[i] + uv[0]*uva[0][i] + uv[1]*uva[1][i]; |
| 571 |
return(1); |
| 572 |
} |
| 573 |
|
| 574 |
/* Add triangle to polygon's list (call-back function) */ |
| 575 |
static int |
| 576 |
add_triangle(const Vert2_list *tp, int a, int b, int c) |
| 577 |
{ |
| 578 |
POLYTRIS *ptp = (POLYTRIS *)tp->p; |
| 579 |
struct ptri *trip = ptp->tri + ptp->ntris++; |
| 580 |
|
| 581 |
trip->vndx[0] = a; |
| 582 |
trip->vndx[1] = b; |
| 583 |
trip->vndx[2] = c; |
| 584 |
return(1); |
| 585 |
} |
| 586 |
|
| 587 |
/* Generate origin on polygon surface from uniform random variable */ |
| 588 |
static int |
| 589 |
ssamp_poly(FVECT orig, SURF *sp, double x) |
| 590 |
{ |
| 591 |
POLYTRIS *ptp = (POLYTRIS *)sp->priv; |
| 592 |
double samp2[2]; |
| 593 |
double *v0, *v1, *v2; |
| 594 |
int i; |
| 595 |
|
| 596 |
if (ptp == NULL) { /* need to triangulate */ |
| 597 |
ptp = (POLYTRIS *)malloc(sizeof(POLYTRIS) + |
| 598 |
sizeof(struct ptri)*(sp->nfargs/3 - 3)); |
| 599 |
if (ptp == NULL) |
| 600 |
goto memerr; |
| 601 |
if (sp->nfargs == 3) { /* simple case */ |
| 602 |
ptp->ntris = 1; |
| 603 |
ptp->tri[0].vndx[0] = 0; |
| 604 |
ptp->tri[0].vndx[1] = 1; |
| 605 |
ptp->tri[0].vndx[2] = 2; |
| 606 |
ptp->tri[0].afrac = 1; |
| 607 |
} else { |
| 608 |
Vert2_list *v2l = polyAlloc(sp->nfargs/3); |
| 609 |
if (v2l == NULL) |
| 610 |
goto memerr; |
| 611 |
make_axes(ptp->uva, sp->snrm); |
| 612 |
for (i = v2l->nv; i--; ) { |
| 613 |
v2l->v[i].mX = DOT(sp->farg+3*i, ptp->uva[0]); |
| 614 |
v2l->v[i].mY = DOT(sp->farg+3*i, ptp->uva[1]); |
| 615 |
} |
| 616 |
ptp->ntris = 0; |
| 617 |
v2l->p = (void *)ptp; |
| 618 |
if (!polyTriangulate(v2l, add_triangle)) { |
| 619 |
fprintf(stderr, |
| 620 |
"%s: cannot triangulate polygon '%s'\n", |
| 621 |
progname, sp->sname); |
| 622 |
return(0); |
| 623 |
} |
| 624 |
for (i = ptp->ntris; i--; ) { |
| 625 |
int a = ptp->tri[i].vndx[0]; |
| 626 |
int b = ptp->tri[i].vndx[1]; |
| 627 |
int c = ptp->tri[i].vndx[2]; |
| 628 |
ptp->tri[i].afrac = |
| 629 |
(v2l->v[a].mX*v2l->v[b].mY - |
| 630 |
v2l->v[b].mX*v2l->v[a].mY + |
| 631 |
v2l->v[b].mX*v2l->v[c].mY - |
| 632 |
v2l->v[c].mX*v2l->v[b].mY + |
| 633 |
v2l->v[c].mX*v2l->v[a].mY - |
| 634 |
v2l->v[a].mX*v2l->v[c].mY) / |
| 635 |
(2.*sp->area); |
| 636 |
} |
| 637 |
polyFree(v2l); |
| 638 |
} |
| 639 |
sp->priv = (void *)ptp; |
| 640 |
} |
| 641 |
/* pick triangle by partial area */ |
| 642 |
for (i = 0; i < ptp->ntris && x > ptp->tri[i].afrac; i++) |
| 643 |
x -= ptp->tri[i].afrac; |
| 644 |
SDmultiSamp(samp2, 2, x/ptp->tri[i].afrac); |
| 645 |
samp2[0] *= samp2[1] = sqrt(samp2[1]); |
| 646 |
samp2[1] = 1. - samp2[1]; |
| 647 |
v0 = sp->farg + 3*ptp->tri[i].vndx[0]; |
| 648 |
v1 = sp->farg + 3*ptp->tri[i].vndx[1]; |
| 649 |
v2 = sp->farg + 3*ptp->tri[i].vndx[2]; |
| 650 |
for (i = 3; i--; ) |
| 651 |
orig[i] = v0[i] + samp2[0]*(v1[i] - v0[i]) |
| 652 |
+ samp2[1]*(v2[i] - v0[i]) ; |
| 653 |
return(1); |
| 654 |
memerr: |
| 655 |
fputs(progname, stderr); |
| 656 |
fputs(": out of memory in ssamp_poly!\n", stderr); |
| 657 |
return(0); |
| 658 |
} |
| 659 |
|
| 660 |
/* Compute sample origin based on projected areas of sender subsurfaces */ |
| 661 |
static int |
| 662 |
sample_origin(PARAMS *p, FVECT orig, const FVECT rdir, double x) |
| 663 |
{ |
| 664 |
static double *projsa; |
| 665 |
static int nall; |
| 666 |
double tarea = 0; |
| 667 |
int i; |
| 668 |
SURF *sp; |
| 669 |
/* special case for lone surface */ |
| 670 |
if (p->nsurfs == 1) { |
| 671 |
sp = p->slist; |
| 672 |
if (DOT(sp->snrm, rdir) >= -FTINY) { |
| 673 |
fprintf(stderr, |
| 674 |
"%s: internal - sample behind sender '%s'\n", |
| 675 |
progname, sp->sname); |
| 676 |
return(0); |
| 677 |
} |
| 678 |
return((*orig_in_surf[sp->styp])(orig, sp, x)); |
| 679 |
} |
| 680 |
if (p->nsurfs > nall) { /* (re)allocate surface area cache */ |
| 681 |
if (projsa) free(projsa); |
| 682 |
projsa = (double *)malloc(sizeof(double)*p->nsurfs); |
| 683 |
if (!projsa) return(0); |
| 684 |
nall = p->nsurfs; |
| 685 |
} |
| 686 |
/* compute projected areas */ |
| 687 |
for (i = 0, sp = p->slist; sp != NULL; i++, sp = sp->next) { |
| 688 |
projsa[i] = -DOT(sp->snrm, rdir) * sp->area; |
| 689 |
tarea += projsa[i] *= (double)(projsa[i] > FTINY); |
| 690 |
} |
| 691 |
if (tarea <= FTINY) { /* wrong side of sender? */ |
| 692 |
fputs(progname, stderr); |
| 693 |
fputs(": internal - sample behind all sender elements!\n", |
| 694 |
stderr); |
| 695 |
return(0); |
| 696 |
} |
| 697 |
tarea *= x; /* get surface from list */ |
| 698 |
for (i = 0, sp = p->slist; tarea > projsa[i]; sp = sp->next) |
| 699 |
tarea -= projsa[i++]; |
| 700 |
return((*orig_in_surf[sp->styp])(orig, sp, tarea/projsa[i])); |
| 701 |
} |
| 702 |
|
| 703 |
/* Uniform sample generator */ |
| 704 |
static int |
| 705 |
sample_uniform(PARAMS *p, int b, FILE *fp) |
| 706 |
{ |
| 707 |
int n = sampcnt; |
| 708 |
double samp3[3]; |
| 709 |
double duvw[3]; |
| 710 |
FVECT orig_dir[2]; |
| 711 |
int i; |
| 712 |
|
| 713 |
if (fp == NULL) /* just requesting number of bins? */ |
| 714 |
return(1); |
| 715 |
|
| 716 |
while (n--) { /* stratified hemisphere sampling */ |
| 717 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
| 718 |
SDsquare2disk(duvw, samp3[1], samp3[2]); |
| 719 |
duvw[2] = -sqrt(1. - duvw[0]*duvw[0] - duvw[1]*duvw[1]); |
| 720 |
for (i = 3; i--; ) |
| 721 |
orig_dir[1][i] = duvw[0]*p->udir[i] + |
| 722 |
duvw[1]*p->vdir[i] + |
| 723 |
duvw[2]*p->nrm[i] ; |
| 724 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0])) |
| 725 |
return(0); |
| 726 |
if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2) |
| 727 |
return(0); |
| 728 |
} |
| 729 |
return(1); |
| 730 |
} |
| 731 |
|
| 732 |
/* Shirly-Chiu sample generator */ |
| 733 |
static int |
| 734 |
sample_shirchiu(PARAMS *p, int b, FILE *fp) |
| 735 |
{ |
| 736 |
int n = sampcnt; |
| 737 |
double samp3[3]; |
| 738 |
double duvw[3]; |
| 739 |
FVECT orig_dir[2]; |
| 740 |
int i; |
| 741 |
|
| 742 |
if (fp == NULL) /* just requesting number of bins? */ |
| 743 |
return(p->hsiz*p->hsiz); |
| 744 |
|
| 745 |
while (n--) { /* stratified sampling */ |
| 746 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
| 747 |
SDsquare2disk(duvw, (b/p->hsiz + samp3[1])/curparams.hsiz, |
| 748 |
(b%p->hsiz + samp3[2])/curparams.hsiz); |
| 749 |
duvw[2] = sqrt(1. - duvw[0]*duvw[0] - duvw[1]*duvw[1]); |
| 750 |
for (i = 3; i--; ) |
| 751 |
orig_dir[1][i] = -duvw[0]*p->udir[i] - |
| 752 |
duvw[1]*p->vdir[i] - |
| 753 |
duvw[2]*p->nrm[i] ; |
| 754 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0])) |
| 755 |
return(0); |
| 756 |
if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2) |
| 757 |
return(0); |
| 758 |
} |
| 759 |
return(1); |
| 760 |
} |
| 761 |
|
| 762 |
/* Reinhart/Tregenza sample generator */ |
| 763 |
static int |
| 764 |
sample_reinhart(PARAMS *p, int b, FILE *fp) |
| 765 |
{ |
| 766 |
#define T_NALT 7 |
| 767 |
static const int tnaz[T_NALT] = {30, 30, 24, 24, 18, 12, 6}; |
| 768 |
const int RowMax = T_NALT*p->hsiz + 1; |
| 769 |
const double RAH = (.5*PI)/(RowMax-.5); |
| 770 |
#define rnaz(r) (r >= RowMax-1 ? 1 : p->hsiz*tnaz[r/p->hsiz]) |
| 771 |
int n = sampcnt; |
| 772 |
int row, col; |
| 773 |
double samp3[3]; |
| 774 |
double alt, azi; |
| 775 |
double duvw[3]; |
| 776 |
FVECT orig_dir[2]; |
| 777 |
int i; |
| 778 |
|
| 779 |
if (fp == NULL) { /* just requesting number of bins? */ |
| 780 |
n = 0; |
| 781 |
for (row = RowMax; row--; ) n += rnaz(row); |
| 782 |
return(n); |
| 783 |
} |
| 784 |
row = 0; /* identify row & column */ |
| 785 |
col = b; |
| 786 |
while (col >= rnaz(row)) { |
| 787 |
col -= rnaz(row); |
| 788 |
++row; |
| 789 |
} |
| 790 |
while (n--) { /* stratified sampling */ |
| 791 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
| 792 |
alt = (row+samp3[1])*RAH; |
| 793 |
azi = (2.*PI)*(col+samp3[2]-.5)/rnaz(row); |
| 794 |
duvw[2] = cos(alt); /* measured from horizon */ |
| 795 |
duvw[0] = tcos(azi)*duvw[2]; |
| 796 |
duvw[1] = tsin(azi)*duvw[2]; |
| 797 |
duvw[2] = sqrt(1. - duvw[2]*duvw[2]); |
| 798 |
for (i = 3; i--; ) |
| 799 |
orig_dir[1][i] = -duvw[0]*p->udir[i] - |
| 800 |
duvw[1]*p->vdir[i] - |
| 801 |
duvw[2]*p->nrm[i] ; |
| 802 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0])) |
| 803 |
return(0); |
| 804 |
if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2) |
| 805 |
return(0); |
| 806 |
} |
| 807 |
return(1); |
| 808 |
#undef rnaz |
| 809 |
#undef T_NALT |
| 810 |
} |
| 811 |
|
| 812 |
/* Klems sample generator */ |
| 813 |
static int |
| 814 |
sample_klems(PARAMS *p, int b, FILE *fp) |
| 815 |
{ |
| 816 |
static const char bname[4][20] = { |
| 817 |
"LBNL/Klems Full", |
| 818 |
"LBNL/Klems Half", |
| 819 |
"INTERNAL ERROR", |
| 820 |
"LBNL/Klems Quarter" |
| 821 |
}; |
| 822 |
static ANGLE_BASIS *kbasis[4]; |
| 823 |
const int bi = p->hemis[1] - '1'; |
| 824 |
int n = sampcnt; |
| 825 |
double samp2[2]; |
| 826 |
double duvw[3]; |
| 827 |
FVECT orig_dir[2]; |
| 828 |
int i; |
| 829 |
|
| 830 |
if (!kbasis[bi]) { /* need to get basis, first */ |
| 831 |
for (i = 4; i--; ) |
| 832 |
if (!strcasecmp(abase_list[i].name, bname[bi])) { |
| 833 |
kbasis[bi] = &abase_list[i]; |
| 834 |
break; |
| 835 |
} |
| 836 |
if (i < 0) { |
| 837 |
fprintf(stderr, "%s: unknown hemisphere basis '%s'\n", |
| 838 |
progname, bname[bi]); |
| 839 |
return(0); |
| 840 |
} |
| 841 |
} |
| 842 |
if (fp == NULL) /* just requesting number of bins? */ |
| 843 |
return(kbasis[bi]->nangles); |
| 844 |
|
| 845 |
while (n--) { /* stratified sampling */ |
| 846 |
SDmultiSamp(samp2, 2, (n+frandom())/sampcnt); |
| 847 |
if (!bo_getvec(duvw, b+samp2[1], kbasis[bi])) |
| 848 |
return(0); |
| 849 |
for (i = 3; i--; ) |
| 850 |
orig_dir[1][i] = duvw[0]*p->udir[i] + |
| 851 |
duvw[1]*p->vdir[i] + |
| 852 |
duvw[2]*p->nrm[i] ; |
| 853 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp2[0])) |
| 854 |
return(0); |
| 855 |
if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2) |
| 856 |
return(0); |
| 857 |
} |
| 858 |
return(1); |
| 859 |
} |
| 860 |
|
| 861 |
/* Prepare hemisphere basis sampler that will send rays to rcontrib */ |
| 862 |
static int |
| 863 |
prepare_sampler(void) |
| 864 |
{ |
| 865 |
if (curparams.slist == NULL) { /* missing sample surface! */ |
| 866 |
fputs(progname, stderr); |
| 867 |
fputs(": no sender surface!\n", stderr); |
| 868 |
return(-1); |
| 869 |
} |
| 870 |
if (curparams.outfn != NULL) /* misplaced output file spec. */ |
| 871 |
fprintf(stderr, "%s: warning - ignoring output file in sender ('%s')\n", |
| 872 |
progname, curparams.outfn); |
| 873 |
/* check/set basis hemisphere */ |
| 874 |
if (!curparams.hemis[0]) { |
| 875 |
fputs(progname, stderr); |
| 876 |
fputs(": missing sender sampling type!\n", stderr); |
| 877 |
return(-1); |
| 878 |
} |
| 879 |
if (normalize(curparams.nrm) == 0) { |
| 880 |
fputs(progname, stderr); |
| 881 |
fputs(": undefined normal for sender sampling\n", stderr); |
| 882 |
return(-1); |
| 883 |
} |
| 884 |
if (normalize(curparams.vup) == 0) { |
| 885 |
if (fabs(curparams.nrm[2]) < .7) |
| 886 |
curparams.vup[2] = 1; |
| 887 |
else |
| 888 |
curparams.vup[1] = 1; |
| 889 |
} |
| 890 |
VCROSS(curparams.udir, curparams.vup, curparams.nrm); |
| 891 |
if (normalize(curparams.udir) == 0) { |
| 892 |
fputs(progname, stderr); |
| 893 |
fputs(": up vector coincides with sender normal\n", stderr); |
| 894 |
return(-1); |
| 895 |
} |
| 896 |
VCROSS(curparams.vdir, curparams.nrm, curparams.udir); |
| 897 |
if (tolower(curparams.hemis[0]) == 'u' | curparams.hemis[0] == '1') |
| 898 |
curparams.sample_basis = sample_uniform; |
| 899 |
else if (tolower(curparams.hemis[0]) == 's' && |
| 900 |
tolower(curparams.hemis[1]) == 'c') |
| 901 |
curparams.sample_basis = sample_shirchiu; |
| 902 |
else if ((tolower(curparams.hemis[0]) == 'r') | |
| 903 |
(tolower(curparams.hemis[0]) == 't')) |
| 904 |
curparams.sample_basis = sample_reinhart; |
| 905 |
else if (tolower(curparams.hemis[0]) == 'k') { |
| 906 |
switch (curparams.hemis[1]) { |
| 907 |
case '1': |
| 908 |
case '2': |
| 909 |
case '4': |
| 910 |
break; |
| 911 |
case 'f': |
| 912 |
case 'F': |
| 913 |
case '\0': |
| 914 |
curparams.hemis[1] = '1'; |
| 915 |
break; |
| 916 |
case 'h': |
| 917 |
case 'H': |
| 918 |
curparams.hemis[1] = '2'; |
| 919 |
break; |
| 920 |
case 'q': |
| 921 |
case 'Q': |
| 922 |
curparams.hemis[1] = '4'; |
| 923 |
break; |
| 924 |
default: |
| 925 |
goto unrecognized; |
| 926 |
} |
| 927 |
curparams.hemis[2] = '\0'; |
| 928 |
curparams.sample_basis = sample_klems; |
| 929 |
} else |
| 930 |
goto unrecognized; |
| 931 |
/* return number of bins */ |
| 932 |
return((*curparams.sample_basis)(&curparams,0,NULL)); |
| 933 |
unrecognized: |
| 934 |
fprintf(stderr, "%s: unrecognized sender sampling: h=%s\n", |
| 935 |
progname, curparams.hemis); |
| 936 |
return(-1); |
| 937 |
} |
| 938 |
|
| 939 |
/* Compute normal and area for polygon */ |
| 940 |
static int |
| 941 |
finish_polygon(SURF *p) |
| 942 |
{ |
| 943 |
const int nv = p->nfargs / 3; |
| 944 |
FVECT e1, e2, vc; |
| 945 |
int i; |
| 946 |
|
| 947 |
memset(p->snrm, 0, sizeof(FVECT)); |
| 948 |
VSUB(e1, p->farg+3, p->farg); |
| 949 |
for (i = 2; i < nv; i++) { |
| 950 |
VSUB(e2, p->farg+3*i, p->farg); |
| 951 |
VCROSS(vc, e1, e2); |
| 952 |
p->snrm[0] += vc[0]; |
| 953 |
p->snrm[1] += vc[1]; |
| 954 |
p->snrm[2] += vc[2]; |
| 955 |
VCOPY(e1, e2); |
| 956 |
} |
| 957 |
p->area = normalize(p->snrm)*0.5; |
| 958 |
return(p->area > FTINY); |
| 959 |
} |
| 960 |
|
| 961 |
/* Add a surface to our current parameters */ |
| 962 |
static void |
| 963 |
add_surface(int st, const char *oname, FILE *fp) |
| 964 |
{ |
| 965 |
SURF *snew; |
| 966 |
int n; |
| 967 |
/* get floating-point arguments */ |
| 968 |
if (!fscanf(fp, "%d", &n)) return; |
| 969 |
while (n-- > 0) fscanf(fp, "%*s"); |
| 970 |
if (!fscanf(fp, "%d", &n)) return; |
| 971 |
while (n-- > 0) fscanf(fp, "%*d"); |
| 972 |
if (!fscanf(fp, "%d", &n) || n <= 0) return; |
| 973 |
snew = (SURF *)malloc(sizeof(SURF) + sizeof(double)*(n-1)); |
| 974 |
if (snew == NULL) { |
| 975 |
fputs(progname, stderr); |
| 976 |
fputs(": out of memory!\n", stderr); |
| 977 |
exit(1); |
| 978 |
} |
| 979 |
strncpy(snew->sname, oname, sizeof(snew->sname)-1); |
| 980 |
snew->sname[sizeof(snew->sname)-1] = '\0'; |
| 981 |
snew->styp = st; |
| 982 |
snew->priv = NULL; |
| 983 |
snew->nfargs = n; |
| 984 |
for (n = 0; n < snew->nfargs; n++) |
| 985 |
if (fscanf(fp, "%lf", &snew->farg[n]) != 1) { |
| 986 |
fprintf(stderr, "%s: error reading arguments for '%s'\n", |
| 987 |
progname, oname); |
| 988 |
exit(1); |
| 989 |
} |
| 990 |
switch (st) { |
| 991 |
case ST_RING: |
| 992 |
if (snew->nfargs != 8) |
| 993 |
goto badcount; |
| 994 |
VCOPY(snew->snrm, snew->farg+3); |
| 995 |
if (normalize(snew->snrm) == 0) |
| 996 |
goto badnorm; |
| 997 |
if (snew->farg[7] < snew->farg[6]) { |
| 998 |
double t = snew->farg[7]; |
| 999 |
snew->farg[7] = snew->farg[6]; |
| 1000 |
snew->farg[6] = t; |
| 1001 |
} |
| 1002 |
snew->area = PI*(snew->farg[7]*snew->farg[7] - |
| 1003 |
snew->farg[6]*snew->farg[6]); |
| 1004 |
break; |
| 1005 |
case ST_POLY: |
| 1006 |
if (snew->nfargs < 9 || snew->nfargs % 3) |
| 1007 |
goto badcount; |
| 1008 |
finish_polygon(snew); |
| 1009 |
break; |
| 1010 |
case ST_SOURCE: |
| 1011 |
if (snew->nfargs != 4) |
| 1012 |
goto badcount; |
| 1013 |
for (n = 3; n--; ) /* need to reverse "normal" */ |
| 1014 |
snew->snrm[n] = -snew->farg[n]; |
| 1015 |
if (normalize(snew->snrm) == 0) |
| 1016 |
goto badnorm; |
| 1017 |
snew->area = sin((PI/180./2.)*snew->farg[3]); |
| 1018 |
snew->area *= PI*snew->area; |
| 1019 |
break; |
| 1020 |
} |
| 1021 |
if (snew->area <= FTINY) { |
| 1022 |
fprintf(stderr, "%s: warning - zero area for surface '%s'\n", |
| 1023 |
progname, oname); |
| 1024 |
free(snew); |
| 1025 |
return; |
| 1026 |
} |
| 1027 |
VSUM(curparams.nrm, curparams.nrm, snew->snrm, snew->area); |
| 1028 |
snew->next = curparams.slist; |
| 1029 |
curparams.slist = snew; |
| 1030 |
curparams.nsurfs++; |
| 1031 |
return; |
| 1032 |
badcount: |
| 1033 |
fprintf(stderr, "%s: bad argument count for surface element '%s'\n", |
| 1034 |
progname, oname); |
| 1035 |
exit(1); |
| 1036 |
badnorm: |
| 1037 |
fprintf(stderr, "%s: bad orientation for surface element '%s'\n", |
| 1038 |
progname, oname); |
| 1039 |
exit(1); |
| 1040 |
} |
| 1041 |
|
| 1042 |
/* Parse a receiver object (look for modifiers to add to rcontrib command) */ |
| 1043 |
static int |
| 1044 |
add_recv_object(FILE *fp) |
| 1045 |
{ |
| 1046 |
int st; |
| 1047 |
char thismod[128], otype[32], oname[128]; |
| 1048 |
int n; |
| 1049 |
|
| 1050 |
if (fscanf(fp, "%s %s %s", thismod, otype, oname) != 3) |
| 1051 |
return(0); /* must have hit EOF! */ |
| 1052 |
if (!strcmp(otype, "alias")) { |
| 1053 |
fscanf(fp, "%*s"); /* skip alias */ |
| 1054 |
return(0); |
| 1055 |
} |
| 1056 |
/* is it a new receiver? */ |
| 1057 |
if ((st = surf_type(otype)) != ST_NONE) { |
| 1058 |
if (curparams.slist != NULL && (st == ST_SOURCE) ^ |
| 1059 |
(curparams.slist->styp == ST_SOURCE)) { |
| 1060 |
fputs(progname, stderr); |
| 1061 |
fputs(": cannot mix source/non-source receivers!\n", stderr); |
| 1062 |
return(-1); |
| 1063 |
} |
| 1064 |
if (strcmp(thismod, curmod)) { |
| 1065 |
if (curmod[0]) { /* output last receiver? */ |
| 1066 |
finish_receiver(); |
| 1067 |
clear_params(&curparams, 1); |
| 1068 |
} |
| 1069 |
parse_params(&curparams, newparams); |
| 1070 |
newparams[0] = '\0'; |
| 1071 |
strcpy(curmod, thismod); |
| 1072 |
} |
| 1073 |
add_surface(st, oname, fp); /* read & store surface */ |
| 1074 |
return(1); |
| 1075 |
} |
| 1076 |
/* else skip arguments */ |
| 1077 |
if (!fscanf(fp, "%d", &n)) return(0); |
| 1078 |
while (n-- > 0) fscanf(fp, "%*s"); |
| 1079 |
if (!fscanf(fp, "%d", &n)) return(0); |
| 1080 |
while (n-- > 0) fscanf(fp, "%*d"); |
| 1081 |
if (!fscanf(fp, "%d", &n)) return(0); |
| 1082 |
while (n-- > 0) fscanf(fp, "%*f"); |
| 1083 |
return(0); |
| 1084 |
} |
| 1085 |
|
| 1086 |
/* Parse a sender object */ |
| 1087 |
static int |
| 1088 |
add_send_object(FILE *fp) |
| 1089 |
{ |
| 1090 |
int st; |
| 1091 |
char otype[32], oname[128]; |
| 1092 |
int n; |
| 1093 |
|
| 1094 |
if (fscanf(fp, "%*s %s %s", otype, oname) != 2) |
| 1095 |
return(0); /* must have hit EOF! */ |
| 1096 |
if (!strcmp(otype, "alias")) { |
| 1097 |
fscanf(fp, "%*s"); /* skip alias */ |
| 1098 |
return(0); |
| 1099 |
} |
| 1100 |
/* is it a new surface? */ |
| 1101 |
if ((st = surf_type(otype)) != ST_NONE) { |
| 1102 |
if (st == ST_SOURCE) { |
| 1103 |
fputs(progname, stderr); |
| 1104 |
fputs(": cannot use source as a sender!\n", stderr); |
| 1105 |
return(-1); |
| 1106 |
} |
| 1107 |
parse_params(&curparams, newparams); |
| 1108 |
newparams[0] = '\0'; |
| 1109 |
add_surface(st, oname, fp); /* read & store surface */ |
| 1110 |
return(0); |
| 1111 |
} |
| 1112 |
/* else skip arguments */ |
| 1113 |
if (!fscanf(fp, "%d", &n)) return(0); |
| 1114 |
while (n-- > 0) fscanf(fp, "%*s"); |
| 1115 |
if (!fscanf(fp, "%d", &n)) return(0); |
| 1116 |
while (n-- > 0) fscanf(fp, "%*d"); |
| 1117 |
if (!fscanf(fp, "%d", &n)) return(0); |
| 1118 |
while (n-- > 0) fscanf(fp, "%*f"); |
| 1119 |
return(0); |
| 1120 |
} |
| 1121 |
|
| 1122 |
/* Load a Radiance scene using the given callback function for objects */ |
| 1123 |
static int |
| 1124 |
load_scene(const char *inspec, int (*ocb)(FILE *)) |
| 1125 |
{ |
| 1126 |
int rv = 0; |
| 1127 |
char inpbuf[1024]; |
| 1128 |
FILE *fp; |
| 1129 |
int c; |
| 1130 |
|
| 1131 |
if (*inspec == '!') |
| 1132 |
fp = popen(inspec+1, "r"); |
| 1133 |
else |
| 1134 |
fp = fopen(inspec, "r"); |
| 1135 |
if (fp == NULL) { |
| 1136 |
fprintf(stderr, "%s: cannot load '%s'\n", progname, inspec); |
| 1137 |
return(-1); |
| 1138 |
} |
| 1139 |
while ((c = getc(fp)) != EOF) { /* load receiver data */ |
| 1140 |
if (isspace(c)) /* skip leading white space */ |
| 1141 |
continue; |
| 1142 |
if (c == '!') { /* read from a new command */ |
| 1143 |
inpbuf[0] = c; |
| 1144 |
if (fgetline(inpbuf+1, sizeof(inpbuf)-1, fp) != NULL) { |
| 1145 |
if ((c = load_scene(inpbuf, ocb)) < 0) |
| 1146 |
return(c); |
| 1147 |
rv += c; |
| 1148 |
} |
| 1149 |
continue; |
| 1150 |
} |
| 1151 |
if (c == '#') { /* parameters/comment */ |
| 1152 |
if ((c = getc(fp)) == EOF || ungetc(c,fp) == EOF) |
| 1153 |
break; |
| 1154 |
if (!isspace(c) && fscanf(fp, "%s", inpbuf) == 1 && |
| 1155 |
!strcmp(inpbuf, PARAMSTART)) { |
| 1156 |
if (fgets(inpbuf, sizeof(inpbuf), fp) != NULL) |
| 1157 |
strcat(newparams, inpbuf); |
| 1158 |
continue; |
| 1159 |
} |
| 1160 |
while ((c = getc(fp)) != EOF && c != '\n') |
| 1161 |
; /* else skipping comment */ |
| 1162 |
continue; |
| 1163 |
} |
| 1164 |
ungetc(c, fp); /* else check object for receiver */ |
| 1165 |
c = (*ocb)(fp); |
| 1166 |
if (c < 0) |
| 1167 |
return(c); |
| 1168 |
rv += c; |
| 1169 |
} |
| 1170 |
/* close our input stream */ |
| 1171 |
c = (*inspec == '!') ? pclose(fp) : fclose(fp); |
| 1172 |
if (c != 0) { |
| 1173 |
fprintf(stderr, "%s: error loading '%s'\n", progname, inspec); |
| 1174 |
return(-1); |
| 1175 |
} |
| 1176 |
return(rv); |
| 1177 |
} |
| 1178 |
|
| 1179 |
/* Get command arguments and run program */ |
| 1180 |
int |
| 1181 |
main(int argc, char *argv[]) |
| 1182 |
{ |
| 1183 |
char fmtopt[6] = "-faa"; /* default output is ASCII */ |
| 1184 |
char *xrs=NULL, *yrs=NULL, *ldopt=NULL; |
| 1185 |
char *iropt = NULL; |
| 1186 |
char *sendfn; |
| 1187 |
char sampcntbuf[32], nsbinbuf[32]; |
| 1188 |
FILE *rcfp; |
| 1189 |
int nsbins; |
| 1190 |
int a, i; |
| 1191 |
/* screen rcontrib options */ |
| 1192 |
progname = argv[0]; |
| 1193 |
for (a = 1; a < argc-2; a++) { |
| 1194 |
int na; |
| 1195 |
/* check for argument expansion */ |
| 1196 |
while ((na = expandarg(&argc, &argv, a)) > 0) |
| 1197 |
; |
| 1198 |
if (na < 0) { |
| 1199 |
fprintf(stderr, "%s: cannot expand '%s'\n", |
| 1200 |
progname, argv[a]); |
| 1201 |
return(1); |
| 1202 |
} |
| 1203 |
if (argv[a][0] != '-' || !argv[a][1]) |
| 1204 |
break; |
| 1205 |
na = 1; |
| 1206 |
switch (argv[a][1]) { /* !! Keep consistent !! */ |
| 1207 |
case 'v': /* verbose mode */ |
| 1208 |
verbose = !verbose; |
| 1209 |
na = 0; |
| 1210 |
continue; |
| 1211 |
case 'f': /* special case for -fo, -ff, etc. */ |
| 1212 |
switch (argv[a][2]) { |
| 1213 |
case '\0': /* cal file */ |
| 1214 |
goto userr; |
| 1215 |
case 'o': /* force output */ |
| 1216 |
goto userr; |
| 1217 |
case 'a': /* output format */ |
| 1218 |
case 'f': |
| 1219 |
case 'd': |
| 1220 |
case 'c': |
| 1221 |
if (!(fmtopt[3] = argv[a][3])) |
| 1222 |
fmtopt[3] = argv[a][2]; |
| 1223 |
fmtopt[2] = argv[a][2]; |
| 1224 |
na = 0; |
| 1225 |
continue; /* will pass later */ |
| 1226 |
default: |
| 1227 |
goto userr; |
| 1228 |
} |
| 1229 |
break; |
| 1230 |
case 'x': /* x-resolution */ |
| 1231 |
xrs = argv[++a]; |
| 1232 |
na = 0; |
| 1233 |
continue; |
| 1234 |
case 'y': /* y-resolution */ |
| 1235 |
yrs = argv[++a]; |
| 1236 |
na = 0; |
| 1237 |
continue; |
| 1238 |
case 'c': /* number of samples */ |
| 1239 |
sampcnt = atoi(argv[++a]); |
| 1240 |
if (sampcnt <= 0) |
| 1241 |
goto userr; |
| 1242 |
na = 0; /* we re-add this later */ |
| 1243 |
continue; |
| 1244 |
case 'I': /* only for pass-through mode */ |
| 1245 |
case 'i': |
| 1246 |
iropt = argv[a]; |
| 1247 |
na = 0; |
| 1248 |
continue; |
| 1249 |
case 'V': /* options without arguments */ |
| 1250 |
case 'w': |
| 1251 |
case 'u': |
| 1252 |
case 'h': |
| 1253 |
case 'r': |
| 1254 |
break; |
| 1255 |
case 'n': /* options with 1 argument */ |
| 1256 |
case 's': |
| 1257 |
case 'o': |
| 1258 |
na = 2; |
| 1259 |
break; |
| 1260 |
case 'b': /* special case */ |
| 1261 |
if (argv[a][2] != 'v') goto userr; |
| 1262 |
break; |
| 1263 |
case 'l': /* special case */ |
| 1264 |
if (argv[a][2] == 'd') { |
| 1265 |
ldopt = argv[a]; |
| 1266 |
na = 0; |
| 1267 |
continue; |
| 1268 |
} |
| 1269 |
na = 2; |
| 1270 |
break; |
| 1271 |
case 'd': /* special case */ |
| 1272 |
if (argv[a][2] != 'v') na = 2; |
| 1273 |
break; |
| 1274 |
case 'a': /* special case */ |
| 1275 |
na = (argv[a][2] == 'v') ? 4 : 2; |
| 1276 |
break; |
| 1277 |
case 'm': /* special case */ |
| 1278 |
if (!argv[a][2]) goto userr; |
| 1279 |
na = (argv[a][2] == 'e') | (argv[a][2] == 'a') ? 4 : 2; |
| 1280 |
break; |
| 1281 |
default: /* anything else is verbotten */ |
| 1282 |
goto userr; |
| 1283 |
} |
| 1284 |
if (na <= 0) continue; |
| 1285 |
CHECKARGC(na); /* pass on option */ |
| 1286 |
rcarg[nrcargs++] = argv[a]; |
| 1287 |
while (--na) /* + arguments if any */ |
| 1288 |
rcarg[nrcargs++] = argv[++a]; |
| 1289 |
} |
| 1290 |
if (a > argc-2) |
| 1291 |
goto userr; /* check at end of options */ |
| 1292 |
sendfn = argv[a++]; /* assign sender & receiver inputs */ |
| 1293 |
if (sendfn[0] == '-') { /* user wants pass-through mode? */ |
| 1294 |
if (sendfn[1]) goto userr; |
| 1295 |
sendfn = NULL; |
| 1296 |
if (iropt) { |
| 1297 |
CHECKARGC(1); |
| 1298 |
rcarg[nrcargs++] = iropt; |
| 1299 |
} |
| 1300 |
if (xrs) { |
| 1301 |
CHECKARGC(2); |
| 1302 |
rcarg[nrcargs++] = "-x"; |
| 1303 |
rcarg[nrcargs++] = xrs; |
| 1304 |
} |
| 1305 |
if (yrs) { |
| 1306 |
CHECKARGC(2); |
| 1307 |
rcarg[nrcargs++] = "-y"; |
| 1308 |
rcarg[nrcargs++] = yrs; |
| 1309 |
} |
| 1310 |
if (ldopt) { |
| 1311 |
CHECKARGC(1); |
| 1312 |
rcarg[nrcargs++] = ldopt; |
| 1313 |
} |
| 1314 |
if (sampcnt <= 0) sampcnt = 1; |
| 1315 |
} else { /* else in sampling mode */ |
| 1316 |
if (iropt) { |
| 1317 |
fputs(progname, stderr); |
| 1318 |
fputs(": -i, -I supported for pass-through only\n", stderr); |
| 1319 |
return(1); |
| 1320 |
} |
| 1321 |
fmtopt[2] = (sizeof(RREAL)==sizeof(double)) ? 'd' : 'f'; |
| 1322 |
if (sampcnt <= 0) sampcnt = 10000; |
| 1323 |
} |
| 1324 |
sprintf(sampcntbuf, "%d", sampcnt); |
| 1325 |
CHECKARGC(3); /* add our format & sample count */ |
| 1326 |
rcarg[nrcargs++] = fmtopt; |
| 1327 |
rcarg[nrcargs++] = "-c"; |
| 1328 |
rcarg[nrcargs++] = sampcntbuf; |
| 1329 |
/* add receiver arguments to rcontrib */ |
| 1330 |
if (load_scene(argv[a], add_recv_object) < 0) |
| 1331 |
return(1); |
| 1332 |
finish_receiver(); |
| 1333 |
if (sendfn == NULL) { /* pass-through mode? */ |
| 1334 |
CHECKARGC(1); /* add octree */ |
| 1335 |
rcarg[nrcargs++] = oconv_command(argc-a, argv+a); |
| 1336 |
rcarg[nrcargs] = NULL; |
| 1337 |
return(my_exec(rcarg)); /* rcontrib does everything */ |
| 1338 |
} |
| 1339 |
clear_params(&curparams, 0); /* else load sender surface & params */ |
| 1340 |
if (load_scene(sendfn, add_send_object) < 0) |
| 1341 |
return(1); |
| 1342 |
if ((nsbins = prepare_sampler()) <= 0) |
| 1343 |
return(1); |
| 1344 |
CHECKARGC(3); /* add row count and octree */ |
| 1345 |
rcarg[nrcargs++] = "-y"; |
| 1346 |
sprintf(nsbinbuf, "%d", nsbins); |
| 1347 |
rcarg[nrcargs++] = nsbinbuf; |
| 1348 |
rcarg[nrcargs++] = oconv_command(argc-a, argv+a); |
| 1349 |
rcarg[nrcargs] = NULL; |
| 1350 |
/* open pipe to rcontrib process */ |
| 1351 |
if ((rcfp = popen_arglist(rcarg, "w")) == NULL) |
| 1352 |
return(1); |
| 1353 |
SET_FILE_BINARY(rcfp); |
| 1354 |
#ifdef getc_unlocked |
| 1355 |
flockfile(rcfp); |
| 1356 |
#endif |
| 1357 |
if (verbose) { |
| 1358 |
fprintf(stderr, "%s: sampling %d directions", progname, nsbins); |
| 1359 |
if (curparams.nsurfs > 1) |
| 1360 |
fprintf(stderr, " (%d elements)\n", curparams.nsurfs); |
| 1361 |
else |
| 1362 |
fputc('\n', stderr); |
| 1363 |
} |
| 1364 |
for (i = 0; i < nsbins; i++) /* send rcontrib ray samples */ |
| 1365 |
if (!(*curparams.sample_basis)(&curparams, i, rcfp)) |
| 1366 |
return(1); |
| 1367 |
return(pclose(rcfp) == 0); /* all finished! */ |
| 1368 |
userr: |
| 1369 |
if (a < argc-2) |
| 1370 |
fprintf(stderr, "%s: unsupported option '%s'", progname, argv[a]); |
| 1371 |
fprintf(stderr, "Usage: %s [-v][rcontrib options] sender.rad receiver.rad [-i system.oct] [system.rad ..]\n", |
| 1372 |
progname); |
| 1373 |
return(1); |
| 1374 |
} |
