| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: rtrace.c,v 2.103 2022/04/24 15:40:33 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* rtrace.c - program and variables for individual ray tracing. |
| 6 |
*/ |
| 7 |
|
| 8 |
#include "copyright.h" |
| 9 |
|
| 10 |
/* |
| 11 |
* Input is in the form: |
| 12 |
* |
| 13 |
* xorg yorg zorg xdir ydir zdir |
| 14 |
* |
| 15 |
* The direction need not be normalized. Output is flexible. |
| 16 |
* If the direction vector is (0,0,0), then the output is flushed. |
| 17 |
* All values default to ascii representation of real |
| 18 |
* numbers. Binary representations can be selected |
| 19 |
* with '-ff' for float or '-fd' for double. By default, |
| 20 |
* radiance is computed. The '-i' or '-I' options indicate that |
| 21 |
* irradiance values are desired. |
| 22 |
*/ |
| 23 |
|
| 24 |
#include <time.h> |
| 25 |
|
| 26 |
#include "platform.h" |
| 27 |
#include "ray.h" |
| 28 |
#include "ambient.h" |
| 29 |
#include "source.h" |
| 30 |
#include "otypes.h" |
| 31 |
#include "otspecial.h" |
| 32 |
#include "resolu.h" |
| 33 |
#include "random.h" |
| 34 |
|
| 35 |
extern int inform; /* input format */ |
| 36 |
extern int outform; /* output format */ |
| 37 |
extern char *outvals; /* output values */ |
| 38 |
|
| 39 |
extern int imm_irrad; /* compute immediate irradiance? */ |
| 40 |
extern int lim_dist; /* limit distance? */ |
| 41 |
|
| 42 |
extern char *tralist[]; /* list of modifers to trace (or no) */ |
| 43 |
extern int traincl; /* include == 1, exclude == 0 */ |
| 44 |
|
| 45 |
extern int hresolu; /* horizontal resolution */ |
| 46 |
extern int vresolu; /* vertical resolution */ |
| 47 |
|
| 48 |
int castonly = 0; /* only doing ray-casting? */ |
| 49 |
|
| 50 |
#ifndef MAXTSET |
| 51 |
#define MAXTSET 8191 /* maximum number in trace set */ |
| 52 |
#endif |
| 53 |
OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */ |
| 54 |
|
| 55 |
static int Tflag = 0; /* source tracing enabled? */ |
| 56 |
|
| 57 |
static RAY thisray; /* for our convenience */ |
| 58 |
|
| 59 |
static FILE *inpfp = NULL; /* input stream pointer */ |
| 60 |
|
| 61 |
static FVECT *inp_queue = NULL; /* ray input queue if flushing */ |
| 62 |
static int inp_qpos = 0; /* next ray to return */ |
| 63 |
static int inp_qend = 0; /* number of rays in this work group */ |
| 64 |
|
| 65 |
typedef void putf_t(RREAL *v, int n); |
| 66 |
static putf_t puta, putd, putf, putrgbe; |
| 67 |
|
| 68 |
typedef void oputf_t(RAY *r); |
| 69 |
static oputf_t oputo, oputd, oputv, oputV, oputl, oputL, oputc, oputp, |
| 70 |
oputr, oputR, oputx, oputX, oputn, oputN, oputs, |
| 71 |
oputw, oputW, oputm, oputM, oputtilde; |
| 72 |
|
| 73 |
extern void tranotify(OBJECT obj); |
| 74 |
static int is_fifo(FILE *fp); |
| 75 |
static void bogusray(void); |
| 76 |
static void raycast(RAY *r); |
| 77 |
static void rayirrad(RAY *r); |
| 78 |
static void rtcompute(FVECT org, FVECT dir, double dmax); |
| 79 |
static int printvals(RAY *r); |
| 80 |
static int getvec(FVECT vec, int fmt, FILE *fp); |
| 81 |
static int iszerovec(const FVECT vec); |
| 82 |
static double nextray(FVECT org, FVECT dir); |
| 83 |
static void tabin(RAY *r); |
| 84 |
static void ourtrace(RAY *r); |
| 85 |
|
| 86 |
static oputf_t *ray_out[32], *every_out[32]; |
| 87 |
static putf_t *putreal; |
| 88 |
|
| 89 |
|
| 90 |
void |
| 91 |
quit( /* quit program */ |
| 92 |
int code |
| 93 |
) |
| 94 |
{ |
| 95 |
if (ray_pnprocs > 0) /* close children if any */ |
| 96 |
ray_pclose(0); |
| 97 |
else if (ray_pnprocs < 0) |
| 98 |
_exit(code); /* avoid flush() in child */ |
| 99 |
#ifndef NON_POSIX |
| 100 |
else { |
| 101 |
headclean(); /* delete header file */ |
| 102 |
pfclean(); /* clean up persist files */ |
| 103 |
} |
| 104 |
#endif |
| 105 |
exit(code); |
| 106 |
} |
| 107 |
|
| 108 |
|
| 109 |
char * |
| 110 |
formstr( /* return format identifier */ |
| 111 |
int f |
| 112 |
) |
| 113 |
{ |
| 114 |
switch (f) { |
| 115 |
case 'a': return("ascii"); |
| 116 |
case 'f': return("float"); |
| 117 |
case 'd': return("double"); |
| 118 |
case 'c': return(COLRFMT); |
| 119 |
} |
| 120 |
return("unknown"); |
| 121 |
} |
| 122 |
|
| 123 |
|
| 124 |
static void |
| 125 |
trace_sources(void) /* trace rays to light sources, also */ |
| 126 |
{ |
| 127 |
int sn; |
| 128 |
|
| 129 |
for (sn = 0; sn < nsources; sn++) |
| 130 |
source[sn].sflags |= SFOLLOW; |
| 131 |
} |
| 132 |
|
| 133 |
|
| 134 |
void |
| 135 |
rtrace( /* trace rays from file */ |
| 136 |
char *fname, |
| 137 |
int nproc |
| 138 |
) |
| 139 |
{ |
| 140 |
unsigned long vcount = (hresolu > 1) ? (unsigned long)hresolu*vresolu |
| 141 |
: (unsigned long)vresolu; |
| 142 |
long nextflush = (!vresolu | (hresolu <= 1)) * hresolu; |
| 143 |
int something2flush = 0; |
| 144 |
FILE *fp; |
| 145 |
double d; |
| 146 |
FVECT orig, direc; |
| 147 |
/* set up input */ |
| 148 |
if (fname == NULL) |
| 149 |
inpfp = stdin; |
| 150 |
else if ((inpfp = fopen(fname, "r")) == NULL) { |
| 151 |
sprintf(errmsg, "cannot open input file \"%s\"", fname); |
| 152 |
error(SYSTEM, errmsg); |
| 153 |
} |
| 154 |
#ifdef getc_unlocked |
| 155 |
flockfile(inpfp); /* avoid lock/unlock overhead */ |
| 156 |
flockfile(stdout); |
| 157 |
#endif |
| 158 |
if (inform != 'a') |
| 159 |
SET_FILE_BINARY(inpfp); |
| 160 |
/* set up output */ |
| 161 |
if (castonly || every_out[0] != NULL) |
| 162 |
nproc = 1; /* don't bother multiprocessing */ |
| 163 |
if (every_out[0] != NULL) { |
| 164 |
trace = ourtrace; /* enable full tree tracing */ |
| 165 |
if (Tflag) /* light sources, too? */ |
| 166 |
trace_sources(); |
| 167 |
} |
| 168 |
if ((nextflush > 0) & (nproc > nextflush)) { |
| 169 |
error(WARNING, "reducing number of processes to match flush interval"); |
| 170 |
nproc = nextflush; |
| 171 |
} |
| 172 |
if (nproc > 1) { /* start multiprocessing */ |
| 173 |
ray_popen(nproc); |
| 174 |
ray_fifo_out = printvals; |
| 175 |
} |
| 176 |
if (hresolu > 0) { |
| 177 |
if (vresolu > 0) |
| 178 |
fprtresolu(hresolu, vresolu, stdout); |
| 179 |
else |
| 180 |
fflush(stdout); |
| 181 |
} |
| 182 |
/* process input rays */ |
| 183 |
while ((d = nextray(orig, direc)) >= 0.0) { |
| 184 |
if (d == 0.0) { /* flush request? */ |
| 185 |
if (something2flush) { |
| 186 |
if (ray_pnprocs > 1 && ray_fifo_flush() < 0) |
| 187 |
error(USER, "child(ren) died"); |
| 188 |
bogusray(); |
| 189 |
fflush(stdout); |
| 190 |
nextflush = (!vresolu | (hresolu <= 1)) * hresolu; |
| 191 |
something2flush = 0; |
| 192 |
} else |
| 193 |
bogusray(); |
| 194 |
} else { /* compute and print */ |
| 195 |
rtcompute(orig, direc, lim_dist ? d : 0.0); |
| 196 |
if (!--nextflush) { /* flush if time */ |
| 197 |
if (ray_pnprocs > 1 && ray_fifo_flush() < 0) |
| 198 |
error(USER, "child(ren) died"); |
| 199 |
fflush(stdout); |
| 200 |
nextflush = hresolu; |
| 201 |
} else |
| 202 |
something2flush = 1; |
| 203 |
} |
| 204 |
if (ferror(stdout)) |
| 205 |
error(SYSTEM, "write error"); |
| 206 |
if (vcount && !--vcount) /* check for end */ |
| 207 |
break; |
| 208 |
} |
| 209 |
if (ray_pnprocs > 1) { /* clean up children */ |
| 210 |
if (ray_fifo_flush() < 0) |
| 211 |
error(USER, "unable to complete processing"); |
| 212 |
ray_pclose(0); |
| 213 |
} |
| 214 |
if (vcount) |
| 215 |
error(WARNING, "unexpected EOF on input"); |
| 216 |
if (fflush(stdout) < 0) |
| 217 |
error(SYSTEM, "write error"); |
| 218 |
if (fname != NULL) { |
| 219 |
fclose(inpfp); |
| 220 |
inpfp = NULL; |
| 221 |
} |
| 222 |
nextray(NULL, NULL); |
| 223 |
} |
| 224 |
|
| 225 |
|
| 226 |
int |
| 227 |
setrtoutput(void) /* set up output tables, return #comp */ |
| 228 |
{ |
| 229 |
char *vs = outvals; |
| 230 |
oputf_t **table = ray_out; |
| 231 |
int ncomp = 0; |
| 232 |
|
| 233 |
if (!*vs) |
| 234 |
error(USER, "empty output specification"); |
| 235 |
|
| 236 |
switch (outform) { /* make sure (*putreal)() calls someone! */ |
| 237 |
case 'a': putreal = puta; break; |
| 238 |
case 'f': putreal = putf; break; |
| 239 |
case 'd': putreal = putd; break; |
| 240 |
case 'c': |
| 241 |
if (outvals[1] || !strchr("vrx", outvals[0])) |
| 242 |
error(USER, "color format only with -ov, -or, -ox"); |
| 243 |
putreal = putrgbe; break; |
| 244 |
default: |
| 245 |
error(CONSISTENCY, "botched output format"); |
| 246 |
} |
| 247 |
castonly = 1; /* sets castonly as side-effect */ |
| 248 |
do |
| 249 |
switch (*vs) { |
| 250 |
case 'T': /* trace sources */ |
| 251 |
Tflag++; |
| 252 |
/* fall through */ |
| 253 |
case 't': /* trace */ |
| 254 |
if (!vs[1]) break; |
| 255 |
*table = NULL; |
| 256 |
table = every_out; |
| 257 |
castonly = 0; |
| 258 |
break; |
| 259 |
case 'o': /* origin */ |
| 260 |
*table++ = oputo; |
| 261 |
ncomp += 3; |
| 262 |
break; |
| 263 |
case 'd': /* direction */ |
| 264 |
*table++ = oputd; |
| 265 |
ncomp += 3; |
| 266 |
break; |
| 267 |
case 'r': /* reflected contrib. */ |
| 268 |
*table++ = oputr; |
| 269 |
ncomp += 3; |
| 270 |
castonly = 0; |
| 271 |
break; |
| 272 |
case 'R': /* reflected distance */ |
| 273 |
*table++ = oputR; |
| 274 |
ncomp++; |
| 275 |
castonly = 0; |
| 276 |
break; |
| 277 |
case 'x': /* xmit contrib. */ |
| 278 |
*table++ = oputx; |
| 279 |
ncomp += 3; |
| 280 |
castonly = 0; |
| 281 |
break; |
| 282 |
case 'X': /* xmit distance */ |
| 283 |
*table++ = oputX; |
| 284 |
ncomp++; |
| 285 |
castonly = 0; |
| 286 |
break; |
| 287 |
case 'v': /* value */ |
| 288 |
*table++ = oputv; |
| 289 |
ncomp += 3; |
| 290 |
castonly = 0; |
| 291 |
break; |
| 292 |
case 'V': /* contribution */ |
| 293 |
*table++ = oputV; |
| 294 |
ncomp += 3; |
| 295 |
castonly = 0; |
| 296 |
if (ambounce > 0 && (ambacc > FTINY || ambssamp > 0)) |
| 297 |
error(WARNING, |
| 298 |
"-otV accuracy depends on -aa 0 -as 0"); |
| 299 |
break; |
| 300 |
case 'l': /* effective distance */ |
| 301 |
*table++ = oputl; |
| 302 |
ncomp++; |
| 303 |
castonly = 0; |
| 304 |
break; |
| 305 |
case 'c': /* local coordinates */ |
| 306 |
*table++ = oputc; |
| 307 |
ncomp += 2; |
| 308 |
break; |
| 309 |
case 'L': /* single ray length */ |
| 310 |
*table++ = oputL; |
| 311 |
ncomp++; |
| 312 |
break; |
| 313 |
case 'p': /* point */ |
| 314 |
*table++ = oputp; |
| 315 |
ncomp += 3; |
| 316 |
break; |
| 317 |
case 'n': /* perturbed normal */ |
| 318 |
*table++ = oputn; |
| 319 |
ncomp += 3; |
| 320 |
castonly = 0; |
| 321 |
break; |
| 322 |
case 'N': /* unperturbed normal */ |
| 323 |
*table++ = oputN; |
| 324 |
ncomp += 3; |
| 325 |
break; |
| 326 |
case 's': /* surface */ |
| 327 |
*table++ = oputs; |
| 328 |
ncomp++; |
| 329 |
break; |
| 330 |
case 'w': /* weight */ |
| 331 |
*table++ = oputw; |
| 332 |
ncomp++; |
| 333 |
break; |
| 334 |
case 'W': /* coefficient */ |
| 335 |
*table++ = oputW; |
| 336 |
ncomp += 3; |
| 337 |
castonly = 0; |
| 338 |
if (ambounce > 0 && (ambacc > FTINY) | (ambssamp > 0)) |
| 339 |
error(WARNING, |
| 340 |
"-otW accuracy depends on -aa 0 -as 0"); |
| 341 |
break; |
| 342 |
case 'm': /* modifier */ |
| 343 |
*table++ = oputm; |
| 344 |
ncomp++; |
| 345 |
break; |
| 346 |
case 'M': /* material */ |
| 347 |
*table++ = oputM; |
| 348 |
ncomp++; |
| 349 |
break; |
| 350 |
case '~': /* tilde */ |
| 351 |
*table++ = oputtilde; |
| 352 |
break; |
| 353 |
default: |
| 354 |
sprintf(errmsg, "unrecognized output option '%c'", *vs); |
| 355 |
error(USER, errmsg); |
| 356 |
} |
| 357 |
while (*++vs); |
| 358 |
|
| 359 |
*table = NULL; |
| 360 |
if (*every_out != NULL) |
| 361 |
ncomp = 0; |
| 362 |
/* compatibility */ |
| 363 |
if ((do_irrad | imm_irrad) && castonly) |
| 364 |
error(USER, "-I+ and -i+ options require some value output"); |
| 365 |
for (table = ray_out; *table != NULL; table++) { |
| 366 |
if ((*table == oputV) | (*table == oputW)) |
| 367 |
error(WARNING, "-oVW options require trace mode"); |
| 368 |
if ((do_irrad | imm_irrad) && |
| 369 |
(*table == oputr) | (*table == oputR) | |
| 370 |
(*table == oputx) | (*table == oputX)) |
| 371 |
error(WARNING, "-orRxX options incompatible with -I+ and -i+"); |
| 372 |
} |
| 373 |
return(ncomp); |
| 374 |
} |
| 375 |
|
| 376 |
|
| 377 |
static void |
| 378 |
bogusray(void) /* print out empty record */ |
| 379 |
{ |
| 380 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
| 381 |
printvals(&thisray); |
| 382 |
} |
| 383 |
|
| 384 |
|
| 385 |
static void |
| 386 |
raycast( /* compute first ray intersection only */ |
| 387 |
RAY *r |
| 388 |
) |
| 389 |
{ |
| 390 |
if (!localhit(r, &thescene)) { |
| 391 |
if (r->ro == &Aftplane) { /* clipped */ |
| 392 |
r->ro = NULL; |
| 393 |
r->rot = FHUGE; |
| 394 |
} else |
| 395 |
sourcehit(r); |
| 396 |
} |
| 397 |
} |
| 398 |
|
| 399 |
|
| 400 |
static void |
| 401 |
rayirrad( /* compute irradiance rather than radiance */ |
| 402 |
RAY *r |
| 403 |
) |
| 404 |
{ |
| 405 |
void (*old_revf)(RAY *) = r->revf; |
| 406 |
/* pretend we hit surface */ |
| 407 |
r->rxt = r->rot = 1e-5; |
| 408 |
VSUM(r->rop, r->rorg, r->rdir, r->rot); |
| 409 |
r->ron[0] = -r->rdir[0]; |
| 410 |
r->ron[1] = -r->rdir[1]; |
| 411 |
r->ron[2] = -r->rdir[2]; |
| 412 |
r->rod = 1.0; |
| 413 |
/* compute result */ |
| 414 |
r->revf = raytrace; |
| 415 |
(*ofun[Lamb.otype].funp)(&Lamb, r); |
| 416 |
r->revf = old_revf; |
| 417 |
} |
| 418 |
|
| 419 |
|
| 420 |
static void |
| 421 |
rtcompute( /* compute and print ray value(s) */ |
| 422 |
FVECT org, |
| 423 |
FVECT dir, |
| 424 |
double dmax |
| 425 |
) |
| 426 |
{ |
| 427 |
/* set up ray */ |
| 428 |
if (imm_irrad) { |
| 429 |
VSUM(thisray.rorg, org, dir, 1.1e-4); |
| 430 |
thisray.rdir[0] = -dir[0]; |
| 431 |
thisray.rdir[1] = -dir[1]; |
| 432 |
thisray.rdir[2] = -dir[2]; |
| 433 |
thisray.rmax = 0.0; |
| 434 |
} else { |
| 435 |
VCOPY(thisray.rorg, org); |
| 436 |
VCOPY(thisray.rdir, dir); |
| 437 |
thisray.rmax = dmax; |
| 438 |
} |
| 439 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
| 440 |
if (imm_irrad) |
| 441 |
thisray.revf = rayirrad; |
| 442 |
else if (castonly) |
| 443 |
thisray.revf = raycast; |
| 444 |
if (ray_pnprocs > 1) { /* multiprocessing FIFO? */ |
| 445 |
if (ray_fifo_in(&thisray) < 0) |
| 446 |
error(USER, "lost children"); |
| 447 |
return; |
| 448 |
} |
| 449 |
samplendx++; /* else do it ourselves */ |
| 450 |
rayvalue(&thisray); |
| 451 |
printvals(&thisray); |
| 452 |
} |
| 453 |
|
| 454 |
|
| 455 |
static int |
| 456 |
printvals( /* print requested ray values */ |
| 457 |
RAY *r |
| 458 |
) |
| 459 |
{ |
| 460 |
oputf_t **tp; |
| 461 |
|
| 462 |
if (ray_out[0] == NULL) |
| 463 |
return(0); |
| 464 |
for (tp = ray_out; *tp != NULL; tp++) |
| 465 |
(**tp)(r); |
| 466 |
if (outform == 'a') |
| 467 |
putchar('\n'); |
| 468 |
return(1); |
| 469 |
} |
| 470 |
|
| 471 |
|
| 472 |
static int |
| 473 |
is_fifo( /* check if file pointer connected to pipe */ |
| 474 |
FILE *fp |
| 475 |
) |
| 476 |
{ |
| 477 |
#ifdef S_ISFIFO |
| 478 |
struct stat sbuf; |
| 479 |
|
| 480 |
if (fstat(fileno(fp), &sbuf) < 0) |
| 481 |
error(SYSTEM, "fstat() failed on input stream"); |
| 482 |
return(S_ISFIFO(sbuf.st_mode)); |
| 483 |
#else |
| 484 |
return (fp == stdin); /* just a guess, really */ |
| 485 |
#endif |
| 486 |
} |
| 487 |
|
| 488 |
|
| 489 |
static int |
| 490 |
getvec( /* get a vector from fp */ |
| 491 |
FVECT vec, |
| 492 |
int fmt, |
| 493 |
FILE *fp |
| 494 |
) |
| 495 |
{ |
| 496 |
static float vf[3]; |
| 497 |
static double vd[3]; |
| 498 |
char buf[32]; |
| 499 |
int i; |
| 500 |
|
| 501 |
switch (fmt) { |
| 502 |
case 'a': /* ascii */ |
| 503 |
for (i = 0; i < 3; i++) { |
| 504 |
if (fgetword(buf, sizeof(buf), fp) == NULL || |
| 505 |
!isflt(buf)) |
| 506 |
return(-1); |
| 507 |
vec[i] = atof(buf); |
| 508 |
} |
| 509 |
break; |
| 510 |
case 'f': /* binary float */ |
| 511 |
if (getbinary(vf, sizeof(float), 3, fp) != 3) |
| 512 |
return(-1); |
| 513 |
VCOPY(vec, vf); |
| 514 |
break; |
| 515 |
case 'd': /* binary double */ |
| 516 |
if (getbinary(vd, sizeof(double), 3, fp) != 3) |
| 517 |
return(-1); |
| 518 |
VCOPY(vec, vd); |
| 519 |
break; |
| 520 |
default: |
| 521 |
error(CONSISTENCY, "botched input format"); |
| 522 |
} |
| 523 |
return(0); |
| 524 |
} |
| 525 |
|
| 526 |
|
| 527 |
static int |
| 528 |
iszerovec(const FVECT vec) |
| 529 |
{ |
| 530 |
return (vec[0] == 0.0) & (vec[1] == 0.0) & (vec[2] == 0.0); |
| 531 |
} |
| 532 |
|
| 533 |
|
| 534 |
static double |
| 535 |
nextray( /* return next ray in work group (-1.0 if EOF) */ |
| 536 |
FVECT org, |
| 537 |
FVECT dir |
| 538 |
) |
| 539 |
{ |
| 540 |
const size_t qlength = !vresolu * hresolu; |
| 541 |
|
| 542 |
if ((org == NULL) | (dir == NULL)) { |
| 543 |
if (inp_queue != NULL) /* asking to free queue */ |
| 544 |
free(inp_queue); |
| 545 |
inp_queue = NULL; |
| 546 |
inp_qpos = inp_qend = 0; |
| 547 |
return(-1.); |
| 548 |
} |
| 549 |
if (!inp_qend) { /* initialize FIFO queue */ |
| 550 |
int rsiz = 6*20; /* conservative ascii ray size */ |
| 551 |
if (inform == 'f') rsiz = 6*sizeof(float); |
| 552 |
else if (inform == 'd') rsiz = 6*sizeof(double); |
| 553 |
/* check against pipe limit */ |
| 554 |
if (qlength*rsiz > 512 && is_fifo(inpfp)) |
| 555 |
inp_queue = (FVECT *)malloc(sizeof(FVECT)*2*qlength); |
| 556 |
inp_qend = -(inp_queue == NULL); /* flag for no queue */ |
| 557 |
} |
| 558 |
if (inp_qend < 0) { /* not queuing? */ |
| 559 |
if (getvec(org, inform, inpfp) < 0 || |
| 560 |
getvec(dir, inform, inpfp) < 0) |
| 561 |
return(-1.); |
| 562 |
return normalize(dir); |
| 563 |
} |
| 564 |
if (inp_qpos >= inp_qend) { /* need to refill input queue? */ |
| 565 |
for (inp_qend = 0; inp_qend < qlength; inp_qend++) { |
| 566 |
if (getvec(inp_queue[2*inp_qend], inform, inpfp) < 0 |
| 567 |
|| getvec(inp_queue[2*inp_qend+1], |
| 568 |
inform, inpfp) < 0) |
| 569 |
break; /* hit EOF */ |
| 570 |
if (iszerovec(inp_queue[2*inp_qend+1])) { |
| 571 |
++inp_qend; /* flush request */ |
| 572 |
break; |
| 573 |
} |
| 574 |
} |
| 575 |
inp_qpos = 0; |
| 576 |
} |
| 577 |
if (inp_qpos >= inp_qend) /* unexpected EOF? */ |
| 578 |
return(-1.); |
| 579 |
VCOPY(org, inp_queue[2*inp_qpos]); |
| 580 |
VCOPY(dir, inp_queue[2*inp_qpos+1]); |
| 581 |
++inp_qpos; |
| 582 |
return normalize(dir); |
| 583 |
} |
| 584 |
|
| 585 |
|
| 586 |
void |
| 587 |
tranotify( /* record new modifier */ |
| 588 |
OBJECT obj |
| 589 |
) |
| 590 |
{ |
| 591 |
static int hitlimit = 0; |
| 592 |
OBJREC *o = objptr(obj); |
| 593 |
char **tralp; |
| 594 |
|
| 595 |
if (obj == OVOID) { /* starting over */ |
| 596 |
traset[0] = 0; |
| 597 |
hitlimit = 0; |
| 598 |
return; |
| 599 |
} |
| 600 |
if (hitlimit || !ismodifier(o->otype)) |
| 601 |
return; |
| 602 |
for (tralp = tralist; *tralp != NULL; tralp++) |
| 603 |
if (!strcmp(o->oname, *tralp)) { |
| 604 |
if (traset[0] >= MAXTSET) { |
| 605 |
error(WARNING, "too many modifiers in trace list"); |
| 606 |
hitlimit++; |
| 607 |
return; /* should this be fatal? */ |
| 608 |
} |
| 609 |
insertelem(traset, obj); |
| 610 |
return; |
| 611 |
} |
| 612 |
} |
| 613 |
|
| 614 |
|
| 615 |
static void |
| 616 |
ourtrace( /* print ray values */ |
| 617 |
RAY *r |
| 618 |
) |
| 619 |
{ |
| 620 |
oputf_t **tp; |
| 621 |
|
| 622 |
if (every_out[0] == NULL) |
| 623 |
return; |
| 624 |
if (r->ro == NULL) { |
| 625 |
if (traincl == 1) |
| 626 |
return; |
| 627 |
} else if (traincl != -1 && traincl != inset(traset, r->ro->omod)) |
| 628 |
return; |
| 629 |
tabin(r); |
| 630 |
for (tp = every_out; *tp != NULL; tp++) |
| 631 |
(**tp)(r); |
| 632 |
if (outform == 'a') |
| 633 |
putchar('\n'); |
| 634 |
} |
| 635 |
|
| 636 |
|
| 637 |
static void |
| 638 |
tabin( /* tab in appropriate amount */ |
| 639 |
RAY *r |
| 640 |
) |
| 641 |
{ |
| 642 |
const RAY *rp; |
| 643 |
|
| 644 |
for (rp = r->parent; rp != NULL; rp = rp->parent) |
| 645 |
putchar('\t'); |
| 646 |
} |
| 647 |
|
| 648 |
|
| 649 |
static void |
| 650 |
oputo( /* print origin */ |
| 651 |
RAY *r |
| 652 |
) |
| 653 |
{ |
| 654 |
(*putreal)(r->rorg, 3); |
| 655 |
} |
| 656 |
|
| 657 |
|
| 658 |
static void |
| 659 |
oputd( /* print direction */ |
| 660 |
RAY *r |
| 661 |
) |
| 662 |
{ |
| 663 |
(*putreal)(r->rdir, 3); |
| 664 |
} |
| 665 |
|
| 666 |
|
| 667 |
static void |
| 668 |
oputr( /* print mirrored contribution */ |
| 669 |
RAY *r |
| 670 |
) |
| 671 |
{ |
| 672 |
RREAL cval[3]; |
| 673 |
|
| 674 |
cval[0] = colval(r->mcol,RED); |
| 675 |
cval[1] = colval(r->mcol,GRN); |
| 676 |
cval[2] = colval(r->mcol,BLU); |
| 677 |
(*putreal)(cval, 3); |
| 678 |
} |
| 679 |
|
| 680 |
|
| 681 |
|
| 682 |
static void |
| 683 |
oputR( /* print mirrored distance */ |
| 684 |
RAY *r |
| 685 |
) |
| 686 |
{ |
| 687 |
(*putreal)(&r->rmt, 1); |
| 688 |
} |
| 689 |
|
| 690 |
|
| 691 |
static void |
| 692 |
oputx( /* print unmirrored contribution */ |
| 693 |
RAY *r |
| 694 |
) |
| 695 |
{ |
| 696 |
RREAL cval[3]; |
| 697 |
|
| 698 |
cval[0] = colval(r->rcol,RED) - colval(r->mcol,RED); |
| 699 |
cval[1] = colval(r->rcol,GRN) - colval(r->mcol,GRN); |
| 700 |
cval[2] = colval(r->rcol,BLU) - colval(r->mcol,BLU); |
| 701 |
(*putreal)(cval, 3); |
| 702 |
} |
| 703 |
|
| 704 |
|
| 705 |
static void |
| 706 |
oputX( /* print unmirrored distance */ |
| 707 |
RAY *r |
| 708 |
) |
| 709 |
{ |
| 710 |
(*putreal)(&r->rxt, 1); |
| 711 |
} |
| 712 |
|
| 713 |
|
| 714 |
static void |
| 715 |
oputv( /* print value */ |
| 716 |
RAY *r |
| 717 |
) |
| 718 |
{ |
| 719 |
RREAL cval[3]; |
| 720 |
|
| 721 |
cval[0] = colval(r->rcol,RED); |
| 722 |
cval[1] = colval(r->rcol,GRN); |
| 723 |
cval[2] = colval(r->rcol,BLU); |
| 724 |
(*putreal)(cval, 3); |
| 725 |
} |
| 726 |
|
| 727 |
|
| 728 |
static void |
| 729 |
oputV( /* print value contribution */ |
| 730 |
RAY *r |
| 731 |
) |
| 732 |
{ |
| 733 |
RREAL contr[3]; |
| 734 |
|
| 735 |
raycontrib(contr, r, PRIMARY); |
| 736 |
multcolor(contr, r->rcol); |
| 737 |
(*putreal)(contr, 3); |
| 738 |
} |
| 739 |
|
| 740 |
|
| 741 |
static void |
| 742 |
oputl( /* print effective distance */ |
| 743 |
RAY *r |
| 744 |
) |
| 745 |
{ |
| 746 |
RREAL d = raydistance(r); |
| 747 |
|
| 748 |
(*putreal)(&d, 1); |
| 749 |
} |
| 750 |
|
| 751 |
|
| 752 |
static void |
| 753 |
oputL( /* print single ray length */ |
| 754 |
RAY *r |
| 755 |
) |
| 756 |
{ |
| 757 |
(*putreal)(&r->rot, 1); |
| 758 |
} |
| 759 |
|
| 760 |
|
| 761 |
static void |
| 762 |
oputc( /* print local coordinates */ |
| 763 |
RAY *r |
| 764 |
) |
| 765 |
{ |
| 766 |
(*putreal)(r->uv, 2); |
| 767 |
} |
| 768 |
|
| 769 |
|
| 770 |
static RREAL vdummy[3] = {0.0, 0.0, 0.0}; |
| 771 |
|
| 772 |
|
| 773 |
static void |
| 774 |
oputp( /* print intersection point */ |
| 775 |
RAY *r |
| 776 |
) |
| 777 |
{ |
| 778 |
(*putreal)(r->rop, 3); /* set to ray origin if distant or no hit */ |
| 779 |
} |
| 780 |
|
| 781 |
|
| 782 |
static void |
| 783 |
oputN( /* print unperturbed normal */ |
| 784 |
RAY *r |
| 785 |
) |
| 786 |
{ |
| 787 |
if (r->ro == NULL) { /* zero vector if clipped or no hit */ |
| 788 |
(*putreal)(vdummy, 3); |
| 789 |
return; |
| 790 |
} |
| 791 |
if (r->rflips & 1) { /* undo any flippin' flips */ |
| 792 |
FVECT unrm; |
| 793 |
unrm[0] = -r->ron[0]; |
| 794 |
unrm[1] = -r->ron[1]; |
| 795 |
unrm[2] = -r->ron[2]; |
| 796 |
(*putreal)(unrm, 3); |
| 797 |
} else |
| 798 |
(*putreal)(r->ron, 3); |
| 799 |
} |
| 800 |
|
| 801 |
|
| 802 |
static void |
| 803 |
oputn( /* print perturbed normal */ |
| 804 |
RAY *r |
| 805 |
) |
| 806 |
{ |
| 807 |
FVECT pnorm; |
| 808 |
|
| 809 |
if (r->ro == NULL) { /* clipped or no hit */ |
| 810 |
(*putreal)(vdummy, 3); |
| 811 |
return; |
| 812 |
} |
| 813 |
raynormal(pnorm, r); |
| 814 |
(*putreal)(pnorm, 3); |
| 815 |
} |
| 816 |
|
| 817 |
|
| 818 |
static void |
| 819 |
oputs( /* print name */ |
| 820 |
RAY *r |
| 821 |
) |
| 822 |
{ |
| 823 |
if (r->ro != NULL) |
| 824 |
fputs(r->ro->oname, stdout); |
| 825 |
else |
| 826 |
putchar('*'); |
| 827 |
putchar('\t'); |
| 828 |
} |
| 829 |
|
| 830 |
|
| 831 |
static void |
| 832 |
oputw( /* print weight */ |
| 833 |
RAY *r |
| 834 |
) |
| 835 |
{ |
| 836 |
RREAL rwt = r->rweight; |
| 837 |
|
| 838 |
(*putreal)(&rwt, 1); |
| 839 |
} |
| 840 |
|
| 841 |
|
| 842 |
static void |
| 843 |
oputW( /* print coefficient */ |
| 844 |
RAY *r |
| 845 |
) |
| 846 |
{ |
| 847 |
RREAL contr[3]; |
| 848 |
/* shadow ray not on source? */ |
| 849 |
if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
| 850 |
setcolor(contr, 0.0, 0.0, 0.0); |
| 851 |
else |
| 852 |
raycontrib(contr, r, PRIMARY); |
| 853 |
|
| 854 |
(*putreal)(contr, 3); |
| 855 |
} |
| 856 |
|
| 857 |
|
| 858 |
static void |
| 859 |
oputm( /* print modifier */ |
| 860 |
RAY *r |
| 861 |
) |
| 862 |
{ |
| 863 |
if (r->ro != NULL) |
| 864 |
if (r->ro->omod != OVOID) |
| 865 |
fputs(objptr(r->ro->omod)->oname, stdout); |
| 866 |
else |
| 867 |
fputs(VOIDID, stdout); |
| 868 |
else |
| 869 |
putchar('*'); |
| 870 |
putchar('\t'); |
| 871 |
} |
| 872 |
|
| 873 |
|
| 874 |
static void |
| 875 |
oputM( /* print material */ |
| 876 |
RAY *r |
| 877 |
) |
| 878 |
{ |
| 879 |
OBJREC *mat; |
| 880 |
|
| 881 |
if (r->ro != NULL) { |
| 882 |
if ((mat = findmaterial(r->ro)) != NULL) |
| 883 |
fputs(mat->oname, stdout); |
| 884 |
else |
| 885 |
fputs(VOIDID, stdout); |
| 886 |
} else |
| 887 |
putchar('*'); |
| 888 |
putchar('\t'); |
| 889 |
} |
| 890 |
|
| 891 |
|
| 892 |
static void |
| 893 |
oputtilde( /* output tilde (spacer) */ |
| 894 |
RAY *r |
| 895 |
) |
| 896 |
{ |
| 897 |
fputs("~\t", stdout); |
| 898 |
} |
| 899 |
|
| 900 |
|
| 901 |
static void |
| 902 |
puta( /* print ascii value(s) */ |
| 903 |
RREAL *v, int n |
| 904 |
) |
| 905 |
{ |
| 906 |
if (n == 3) { |
| 907 |
printf("%e\t%e\t%e\t", v[0], v[1], v[2]); |
| 908 |
return; |
| 909 |
} |
| 910 |
while (n--) |
| 911 |
printf("%e\t", *v++); |
| 912 |
} |
| 913 |
|
| 914 |
|
| 915 |
static void |
| 916 |
putd(RREAL *v, int n) /* output binary double(s) */ |
| 917 |
{ |
| 918 |
#ifdef SMLFLT |
| 919 |
double da[3]; |
| 920 |
int i; |
| 921 |
|
| 922 |
if (n > 3) |
| 923 |
error(INTERNAL, "code error in putd()"); |
| 924 |
for (i = n; i--; ) |
| 925 |
da[i] = v[i]; |
| 926 |
putbinary(da, sizeof(double), n, stdout); |
| 927 |
#else |
| 928 |
putbinary(v, sizeof(RREAL), n, stdout); |
| 929 |
#endif |
| 930 |
} |
| 931 |
|
| 932 |
|
| 933 |
static void |
| 934 |
putf(RREAL *v, int n) /* output binary float(s) */ |
| 935 |
{ |
| 936 |
#ifndef SMLFLT |
| 937 |
float fa[3]; |
| 938 |
int i; |
| 939 |
|
| 940 |
if (n > 3) |
| 941 |
error(INTERNAL, "code error in putf()"); |
| 942 |
for (i = n; i--; ) |
| 943 |
fa[i] = v[i]; |
| 944 |
putbinary(fa, sizeof(float), n, stdout); |
| 945 |
#else |
| 946 |
putbinary(v, sizeof(RREAL), n, stdout); |
| 947 |
#endif |
| 948 |
} |
| 949 |
|
| 950 |
|
| 951 |
static void |
| 952 |
putrgbe(RREAL *v, int n) /* output RGBE color */ |
| 953 |
{ |
| 954 |
COLR cout; |
| 955 |
|
| 956 |
if (n != 3) |
| 957 |
error(INTERNAL, "putrgbe() not called with 3 components"); |
| 958 |
setcolr(cout, v[0], v[1], v[2]); |
| 959 |
putbinary(cout, sizeof(cout), 1, stdout); |
| 960 |
} |
