| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: rad2mgf.c,v 2.30 2025/04/22 14:51:29 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Convert Radiance scene description to MGF |
| 6 |
*/ |
| 7 |
|
| 8 |
#include <ctype.h> |
| 9 |
|
| 10 |
#include "platform.h" |
| 11 |
#include "rtmath.h" |
| 12 |
#include "rtio.h" |
| 13 |
#include "rtprocess.h" |
| 14 |
#include "object.h" |
| 15 |
#include "color.h" |
| 16 |
#include "lookup.h" |
| 17 |
|
| 18 |
#define C_1SIDEDTHICK 0.005 |
| 19 |
|
| 20 |
|
| 21 |
LUTAB rmats = LU_SINIT(free,NULL); /* defined material table */ |
| 22 |
|
| 23 |
LUTAB rdispatch = LU_SINIT(NULL,NULL); /* function dispatch table */ |
| 24 |
|
| 25 |
char curmat[80]; /* current material */ |
| 26 |
char curobj[128] = "Untitled"; /* current object name */ |
| 27 |
|
| 28 |
double unit_mult = 1.; /* units multiplier */ |
| 29 |
|
| 30 |
#define hasmult (unit_mult < .999 || unit_mult > 1.001) |
| 31 |
|
| 32 |
/* |
| 33 |
* Stuff for tracking and reusing vertices: |
| 34 |
*/ |
| 35 |
|
| 36 |
char VKFMT[] = "%+16.9e %+16.9e %+16.9e"; |
| 37 |
#define VKLEN 64 |
| 38 |
|
| 39 |
#define mkvkey(k,v) sprintf(k, VKFMT, (v)[0], (v)[1], (v)[2]) |
| 40 |
|
| 41 |
#define NVERTS 256 |
| 42 |
|
| 43 |
long vclock; /* incremented at each vertex request */ |
| 44 |
|
| 45 |
struct vert { |
| 46 |
long lused; /* when last used (0 if unassigned) */ |
| 47 |
FVECT p; /* track point position only */ |
| 48 |
} vert[NVERTS]; /* our vertex cache */ |
| 49 |
|
| 50 |
LUTAB vertab = LU_SINIT(free,NULL); /* our vertex lookup table */ |
| 51 |
|
| 52 |
typedef int dispatchf(char *mod, char *typ, char *id, FUNARGS *fa); |
| 53 |
|
| 54 |
void rad2mgf(char *inp); |
| 55 |
void cvtprim(char *inp, char *mod, char *typ, char *id, FUNARGS *fa); |
| 56 |
void newmat(char *id, char *alias); |
| 57 |
void setmat(char *id); |
| 58 |
void setobj(char *id); |
| 59 |
void init(void); |
| 60 |
void uninit(void); |
| 61 |
void clrverts(void); |
| 62 |
void unspace(char *s); |
| 63 |
void add2dispatch(char *name, dispatchf *func); |
| 64 |
char *getvertid(char *vname, FVECT vp); |
| 65 |
|
| 66 |
dispatchf o_unsupported, o_face, o_cone, o_sphere, |
| 67 |
o_cylinder, o_ring, o_instance, o_illum, |
| 68 |
o_plastic, o_metal, o_glass, o_dielectric, |
| 69 |
o_mirror, o_trans, o_light; |
| 70 |
|
| 71 |
|
| 72 |
int |
| 73 |
main( |
| 74 |
int argc, |
| 75 |
char **argv |
| 76 |
) |
| 77 |
{ |
| 78 |
int i; |
| 79 |
|
| 80 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 81 |
switch (argv[i][1]) { |
| 82 |
case 'd': /* units */ |
| 83 |
switch (argv[i][2]) { |
| 84 |
case 'm': /* meters */ |
| 85 |
unit_mult = 1.; |
| 86 |
break; |
| 87 |
case 'c': /* centimeters */ |
| 88 |
unit_mult = .01; |
| 89 |
break; |
| 90 |
case 'f': /* feet */ |
| 91 |
unit_mult = 12.*.0254; |
| 92 |
break; |
| 93 |
case 'i': /* inches */ |
| 94 |
unit_mult = .0254; |
| 95 |
break; |
| 96 |
default: |
| 97 |
goto unkopt; |
| 98 |
} |
| 99 |
break; |
| 100 |
default: |
| 101 |
goto unkopt; |
| 102 |
} |
| 103 |
init(); |
| 104 |
if (i >= argc) |
| 105 |
rad2mgf(NULL); |
| 106 |
else |
| 107 |
for ( ; i < argc; i++) |
| 108 |
rad2mgf(argv[i]); |
| 109 |
uninit(); |
| 110 |
exit(0); |
| 111 |
unkopt: |
| 112 |
fprintf(stderr, "Usage: %s [-d{m|c|f|i}] file ..\n", argv[0]); |
| 113 |
exit(1); |
| 114 |
} |
| 115 |
|
| 116 |
|
| 117 |
void |
| 118 |
rad2mgf( /* convert a Radiance file to MGF */ |
| 119 |
char *inp |
| 120 |
) |
| 121 |
{ |
| 122 |
char buf[512]; |
| 123 |
char mod[128], typ[32], id[128], alias[128]; |
| 124 |
FUNARGS fa; |
| 125 |
FILE *fp; |
| 126 |
int c; |
| 127 |
|
| 128 |
if (inp == NULL) { |
| 129 |
inp = "standard input"; |
| 130 |
fp = stdin; |
| 131 |
} else if (inp[0] == '!') { |
| 132 |
if ((fp = popen(inp+1, "r")) == NULL) { |
| 133 |
fputs(inp, stderr); |
| 134 |
fputs(": cannot execute\n", stderr); |
| 135 |
exit(1); |
| 136 |
} |
| 137 |
} else if ((fp = fopen(inp, "r")) == NULL) { |
| 138 |
fputs(inp, stderr); |
| 139 |
fputs(": cannot open\n", stderr); |
| 140 |
exit(1); |
| 141 |
} |
| 142 |
printf("# Begin conversion from: %s\n", inp); |
| 143 |
while ((c = getc(fp)) != EOF) |
| 144 |
switch (c) { |
| 145 |
case ' ': /* white space */ |
| 146 |
case '\t': |
| 147 |
case '\n': |
| 148 |
case '\r': |
| 149 |
case '\f': |
| 150 |
break; |
| 151 |
case '#': /* comment */ |
| 152 |
if (fgets(buf, sizeof(buf), fp) != NULL) |
| 153 |
printf("# %s", buf); |
| 154 |
break; |
| 155 |
case '!': /* inline command */ |
| 156 |
ungetc(c, fp); |
| 157 |
fgetline(buf, sizeof(buf), fp); |
| 158 |
rad2mgf(buf); |
| 159 |
break; |
| 160 |
default: /* Radiance primitive */ |
| 161 |
ungetc(c, fp); |
| 162 |
if (fgetword(mod, sizeof(mod), fp) == NULL || |
| 163 |
fgetword(typ, sizeof(typ), fp) == NULL || |
| 164 |
fgetword(id, sizeof(id), fp) == NULL) { |
| 165 |
fputs(inp, stderr); |
| 166 |
fputs(": unexpected EOF\n", stderr); |
| 167 |
exit(1); |
| 168 |
} |
| 169 |
unspace(mod); |
| 170 |
unspace(id); |
| 171 |
if (!strcmp(typ, "alias")) { |
| 172 |
strcpy(alias, "EOF"); |
| 173 |
fgetword(alias, sizeof(alias), fp); |
| 174 |
unspace(alias); |
| 175 |
newmat(id, alias); |
| 176 |
} else { |
| 177 |
if (!readfargs(&fa, fp)) { |
| 178 |
fprintf(stderr, |
| 179 |
"%s: bad argument syntax for %s \"%s\"\n", |
| 180 |
inp, typ, id); |
| 181 |
exit(1); |
| 182 |
} |
| 183 |
cvtprim(inp, mod, typ, id, &fa); |
| 184 |
freefargs(&fa); |
| 185 |
} |
| 186 |
break; |
| 187 |
} |
| 188 |
if (inp[0] == '!') { |
| 189 |
if (pclose(fp) != 0) |
| 190 |
fprintf(stderr, "%s: warning - bad exit status\n", inp); |
| 191 |
} else |
| 192 |
fclose(fp); |
| 193 |
printf("# End conversion from: %s\n", inp); |
| 194 |
} |
| 195 |
|
| 196 |
|
| 197 |
void |
| 198 |
unspace( /* replace spaces with underscores in s */ |
| 199 |
char *s |
| 200 |
) |
| 201 |
{ |
| 202 |
while (*s) { |
| 203 |
if (isspace(*s)) |
| 204 |
*s = '_'; |
| 205 |
++s; |
| 206 |
} |
| 207 |
} |
| 208 |
|
| 209 |
|
| 210 |
void |
| 211 |
cvtprim( /* process Radiance primitive */ |
| 212 |
char *inp, |
| 213 |
char *mod, |
| 214 |
char *typ, |
| 215 |
char *id, |
| 216 |
FUNARGS *fa |
| 217 |
) |
| 218 |
{ |
| 219 |
dispatchf *df; |
| 220 |
|
| 221 |
df = (dispatchf *)lu_find(&rdispatch, typ)->data; |
| 222 |
if (df != NULL) { /* convert */ |
| 223 |
if ((*df)(mod, typ, id, fa) < 0) { |
| 224 |
fprintf(stderr, "%s: bad %s \"%s\"\n", "rad2mgf", typ, id); |
| 225 |
exit(1); |
| 226 |
} |
| 227 |
} else { /* unsupported */ |
| 228 |
o_unsupported(mod, typ, id, fa); |
| 229 |
if (lu_find(&rmats, mod)->data != NULL) /* make alias */ |
| 230 |
newmat(id, mod); |
| 231 |
} |
| 232 |
} |
| 233 |
|
| 234 |
|
| 235 |
void |
| 236 |
newmat( /* add a modifier to the alias list */ |
| 237 |
char *id, |
| 238 |
char *alias |
| 239 |
) |
| 240 |
{ |
| 241 |
LUENT *lp, *lpa; |
| 242 |
|
| 243 |
if (alias != NULL) { /* look up alias */ |
| 244 |
if ((lpa = lu_find(&rmats, alias)) == NULL) |
| 245 |
goto memerr; |
| 246 |
if (lpa->data == NULL) |
| 247 |
alias = NULL; /* doesn't exist! */ |
| 248 |
} |
| 249 |
if ((lp = lu_find(&rmats, id)) == NULL) /* look up material */ |
| 250 |
goto memerr; |
| 251 |
if (alias != NULL && lp->data == lpa->key) |
| 252 |
return; /* alias set already */ |
| 253 |
if (lp->data == NULL) { /* allocate material */ |
| 254 |
if ((lp->key = (char *)malloc(strlen(id)+1)) == NULL) |
| 255 |
goto memerr; |
| 256 |
strcpy(lp->key, id); |
| 257 |
} |
| 258 |
if (alias == NULL) { /* set this material */ |
| 259 |
lp->data = lp->key; |
| 260 |
printf("m %s =\n", id); |
| 261 |
} else { /* set this alias */ |
| 262 |
lp->data = lpa->key; |
| 263 |
printf("m %s = %s\n", id, alias); |
| 264 |
} |
| 265 |
strcpy(curmat, id); |
| 266 |
return; |
| 267 |
memerr: |
| 268 |
fputs("Out of memory in newmat!\n", stderr); |
| 269 |
exit(1); |
| 270 |
} |
| 271 |
|
| 272 |
|
| 273 |
void |
| 274 |
setmat( /* set material to this one */ |
| 275 |
char *id |
| 276 |
) |
| 277 |
{ |
| 278 |
if (!strcmp(id, curmat)) /* already set? */ |
| 279 |
return; |
| 280 |
if (!strcmp(id, VOIDID)) /* cannot set */ |
| 281 |
return; |
| 282 |
printf("m %s\n", id); |
| 283 |
strcpy(curmat, id); |
| 284 |
} |
| 285 |
|
| 286 |
|
| 287 |
void |
| 288 |
setobj( /* set object name to this one */ |
| 289 |
char *id |
| 290 |
) |
| 291 |
{ |
| 292 |
char *cp, *cp2; |
| 293 |
char *end = NULL; |
| 294 |
int diff = 0; |
| 295 |
/* use all but final suffix */ |
| 296 |
for (cp = id; *cp; cp++) |
| 297 |
if (*cp == '.') |
| 298 |
end = cp; |
| 299 |
if (end == NULL) |
| 300 |
end = cp; |
| 301 |
/* copy to current object */ |
| 302 |
cp2 = curobj; |
| 303 |
if (!isalpha(*id)) { /* start with letter */ |
| 304 |
diff = *cp2 != 'O'; |
| 305 |
*cp2++ = 'O'; |
| 306 |
} |
| 307 |
for (cp = id; cp < end; *cp2++ = *cp++) { |
| 308 |
if ((*cp < '!') | (*cp > '~')) /* limit to visible chars */ |
| 309 |
*cp = '?'; |
| 310 |
diff += *cp != *cp2; |
| 311 |
} |
| 312 |
if (!diff && !*cp2) |
| 313 |
return; |
| 314 |
*cp2 = '\0'; |
| 315 |
fputs("o\no ", stdout); |
| 316 |
puts(curobj); |
| 317 |
} |
| 318 |
|
| 319 |
|
| 320 |
void |
| 321 |
init(void) /* initialize dispatch table and output */ |
| 322 |
{ |
| 323 |
lu_init(&vertab, NVERTS); |
| 324 |
lu_init(&rdispatch, 22); |
| 325 |
add2dispatch("polygon", o_face); |
| 326 |
add2dispatch("cone", o_cone); |
| 327 |
add2dispatch("cup", o_cone); |
| 328 |
add2dispatch("sphere", o_sphere); |
| 329 |
add2dispatch("bubble", o_sphere); |
| 330 |
add2dispatch("cylinder", o_cylinder); |
| 331 |
add2dispatch("tube", o_cylinder); |
| 332 |
add2dispatch("ring", o_ring); |
| 333 |
add2dispatch("instance", o_instance); |
| 334 |
add2dispatch("mesh", o_instance); |
| 335 |
add2dispatch("plastic", o_plastic); |
| 336 |
add2dispatch("plastic2", o_plastic); |
| 337 |
add2dispatch("metal", o_metal); |
| 338 |
add2dispatch("metal2", o_metal); |
| 339 |
add2dispatch("glass", o_glass); |
| 340 |
add2dispatch("dielectric", o_dielectric); |
| 341 |
add2dispatch("trans", o_trans); |
| 342 |
add2dispatch("trans2", o_trans); |
| 343 |
add2dispatch("mirror", o_mirror); |
| 344 |
add2dispatch("light", o_light); |
| 345 |
add2dispatch("spotlight", o_light); |
| 346 |
add2dispatch("glow", o_light); |
| 347 |
add2dispatch("illum", o_illum); |
| 348 |
puts("# The following was converted from RADIANCE scene input"); |
| 349 |
if (hasmult) |
| 350 |
printf("xf -s %.4e\n", unit_mult); |
| 351 |
printf("o %s\n", curobj); |
| 352 |
} |
| 353 |
|
| 354 |
|
| 355 |
void |
| 356 |
uninit(void) /* mark end of MGF file */ |
| 357 |
{ |
| 358 |
puts("o"); |
| 359 |
if (hasmult) |
| 360 |
puts("xf"); |
| 361 |
puts("# End of data converted from RADIANCE scene input"); |
| 362 |
lu_done(&rdispatch); |
| 363 |
lu_done(&rmats); |
| 364 |
lu_done(&vertab); |
| 365 |
} |
| 366 |
|
| 367 |
|
| 368 |
void |
| 369 |
clrverts(void) /* clear vertex table */ |
| 370 |
{ |
| 371 |
int i; |
| 372 |
|
| 373 |
lu_done(&vertab); |
| 374 |
for (i = 0; i < NVERTS; i++) |
| 375 |
vert[i].lused = 0; |
| 376 |
lu_init(&vertab, NVERTS); |
| 377 |
} |
| 378 |
|
| 379 |
|
| 380 |
void |
| 381 |
add2dispatch( /* add function to dispatch table */ |
| 382 |
char *name, |
| 383 |
int (*func)() |
| 384 |
) |
| 385 |
{ |
| 386 |
LUENT *lp; |
| 387 |
|
| 388 |
lp = lu_find(&rdispatch, name); |
| 389 |
if (lp->key != NULL) { |
| 390 |
fputs(name, stderr); |
| 391 |
fputs(": duplicate dispatch entry!\n", stderr); |
| 392 |
exit(1); |
| 393 |
} |
| 394 |
lp->key = name; |
| 395 |
lp->data = (char *)func; |
| 396 |
} |
| 397 |
|
| 398 |
|
| 399 |
char * |
| 400 |
getvertid( /* get/set vertex ID for this point */ |
| 401 |
char *vname, |
| 402 |
FVECT vp |
| 403 |
) |
| 404 |
{ |
| 405 |
static char vkey[VKLEN]; |
| 406 |
LUENT *lp; |
| 407 |
int i, vndx; |
| 408 |
|
| 409 |
vclock++; /* increment counter */ |
| 410 |
mkvkey(vkey, vp); |
| 411 |
if ((lp = lu_find(&vertab, vkey)) == NULL) |
| 412 |
goto memerr; |
| 413 |
if (lp->data == NULL) { /* allocate new vertex entry */ |
| 414 |
if (lp->key != NULL) /* reclaim deleted entry */ |
| 415 |
vertab.ndel--; |
| 416 |
else { |
| 417 |
if ((lp->key = (char *)malloc(VKLEN)) == NULL) |
| 418 |
goto memerr; |
| 419 |
strcpy(lp->key, vkey); |
| 420 |
} |
| 421 |
vndx = 0; /* find oldest vertex */ |
| 422 |
for (i = 1; i < NVERTS; i++) |
| 423 |
if (vert[i].lused < vert[vndx].lused) |
| 424 |
vndx = i; |
| 425 |
if (vert[vndx].lused) { /* free old entry first */ |
| 426 |
mkvkey(vkey, vert[vndx].p); |
| 427 |
lu_delete(&vertab, vkey); |
| 428 |
} |
| 429 |
VCOPY(vert[vndx].p, vp); /* assign it */ |
| 430 |
printf("v v%d =\n\tp %.15g %.15g %.15g\n", /* print it */ |
| 431 |
vndx, vp[0], vp[1], vp[2]); |
| 432 |
lp->data = (char *)&vert[vndx]; /* set it */ |
| 433 |
} else |
| 434 |
vndx = (struct vert *)lp->data - vert; |
| 435 |
vert[vndx].lused = vclock; /* record this use */ |
| 436 |
sprintf(vname, "v%d", vndx); |
| 437 |
return(vname); |
| 438 |
memerr: |
| 439 |
fputs("Out of memory in getvertid!\n", stderr); |
| 440 |
exit(1); |
| 441 |
} |
| 442 |
|
| 443 |
|
| 444 |
int |
| 445 |
o_unsupported( /* mark unsupported primitive */ |
| 446 |
char *mod, |
| 447 |
char *typ, |
| 448 |
char *id, |
| 449 |
FUNARGS *fa |
| 450 |
) |
| 451 |
{ |
| 452 |
int i; |
| 453 |
|
| 454 |
fputs("\n# Unsupported RADIANCE primitive:\n", stdout); |
| 455 |
printf("# %s %s %s", mod, typ, id); |
| 456 |
printf("\n# %d", fa->nsargs); |
| 457 |
for (i = 0; i < fa->nsargs; i++) |
| 458 |
printf(" %s", fa->sarg[i]); |
| 459 |
#ifdef IARGS |
| 460 |
printf("\n# %d", fa->niargs); |
| 461 |
for (i = 0; i < fa->niargs; i++) |
| 462 |
printf(" %ld", fa->iarg[i]); |
| 463 |
#else |
| 464 |
fputs("\n# 0", stdout); |
| 465 |
#endif |
| 466 |
printf("\n# %d", fa->nfargs); |
| 467 |
for (i = 0; i < fa->nfargs; i++) |
| 468 |
printf(" %g", fa->farg[i]); |
| 469 |
fputs("\n\n", stdout); |
| 470 |
return(0); |
| 471 |
} |
| 472 |
|
| 473 |
|
| 474 |
int |
| 475 |
o_face( /* print out a polygon */ |
| 476 |
char *mod, |
| 477 |
char *typ, |
| 478 |
char *id, |
| 479 |
FUNARGS *fa |
| 480 |
) |
| 481 |
{ |
| 482 |
char entbuf[2048], *linestart; |
| 483 |
char *cp; |
| 484 |
int i; |
| 485 |
|
| 486 |
if ((fa->nfargs < 9) | (fa->nfargs % 3)) |
| 487 |
return(-1); |
| 488 |
setmat(mod); |
| 489 |
setobj(id); |
| 490 |
cp = linestart = entbuf; |
| 491 |
*cp++ = 'f'; |
| 492 |
for (i = 0; i < fa->nfargs; i += 3) { |
| 493 |
*cp++ = ' '; |
| 494 |
if (cp - linestart > 72) { |
| 495 |
*cp++ = '\\'; *cp++ = '\n'; |
| 496 |
linestart = cp; |
| 497 |
*cp++ = ' '; *cp++ = ' '; |
| 498 |
} |
| 499 |
getvertid(cp, fa->farg + i); |
| 500 |
while (*cp) |
| 501 |
cp++; |
| 502 |
} |
| 503 |
puts(entbuf); |
| 504 |
return(0); |
| 505 |
} |
| 506 |
|
| 507 |
|
| 508 |
int |
| 509 |
o_cone( /* print out a cone */ |
| 510 |
char *mod, |
| 511 |
char *typ, |
| 512 |
char *id, |
| 513 |
FUNARGS *fa |
| 514 |
) |
| 515 |
{ |
| 516 |
char v1[6], v2[6]; |
| 517 |
|
| 518 |
if (fa->nfargs != 8) |
| 519 |
return(-1); |
| 520 |
setmat(mod); |
| 521 |
setobj(id); |
| 522 |
getvertid(v1, fa->farg); |
| 523 |
getvertid(v2, fa->farg + 3); |
| 524 |
if (typ[1] == 'u') /* cup -> inverted cone */ |
| 525 |
printf("cone %s %.12g %s %.12g\n", |
| 526 |
v1, -fa->farg[6], v2, -fa->farg[7]); |
| 527 |
else |
| 528 |
printf("cone %s %.12g %s %.12g\n", |
| 529 |
v1, fa->farg[6], v2, fa->farg[7]); |
| 530 |
return(0); |
| 531 |
} |
| 532 |
|
| 533 |
|
| 534 |
int |
| 535 |
o_sphere( /* print out a sphere */ |
| 536 |
char *mod, |
| 537 |
char *typ, |
| 538 |
char *id, |
| 539 |
FUNARGS *fa |
| 540 |
) |
| 541 |
{ |
| 542 |
char cent[6]; |
| 543 |
|
| 544 |
if (fa->nfargs != 4) |
| 545 |
return(-1); |
| 546 |
setmat(mod); |
| 547 |
setobj(id); |
| 548 |
printf("sph %s %.12g\n", getvertid(cent, fa->farg), |
| 549 |
typ[0]=='b' ? -fa->farg[3] : fa->farg[3]); |
| 550 |
return(0); |
| 551 |
} |
| 552 |
|
| 553 |
|
| 554 |
int |
| 555 |
o_cylinder( /* print out a cylinder */ |
| 556 |
char *mod, |
| 557 |
char *typ, |
| 558 |
char *id, |
| 559 |
FUNARGS *fa |
| 560 |
) |
| 561 |
{ |
| 562 |
char v1[6], v2[6]; |
| 563 |
|
| 564 |
if (fa->nfargs != 7) |
| 565 |
return(-1); |
| 566 |
setmat(mod); |
| 567 |
setobj(id); |
| 568 |
getvertid(v1, fa->farg); |
| 569 |
getvertid(v2, fa->farg + 3); |
| 570 |
printf("cyl %s %.12g %s\n", v1, |
| 571 |
typ[0]=='t' ? -fa->farg[6] : fa->farg[6], v2); |
| 572 |
return(0); |
| 573 |
} |
| 574 |
|
| 575 |
|
| 576 |
int |
| 577 |
o_ring( /* print out a ring */ |
| 578 |
char *mod, |
| 579 |
char *typ, |
| 580 |
char *id, |
| 581 |
FUNARGS *fa |
| 582 |
) |
| 583 |
{ |
| 584 |
if (fa->nfargs != 8) |
| 585 |
return(-1); |
| 586 |
setmat(mod); |
| 587 |
setobj(id); |
| 588 |
printf("v cent =\n\tp %.12g %.12g %.12g\n", |
| 589 |
fa->farg[0], fa->farg[1], fa->farg[2]); |
| 590 |
printf("\tn %.12g %.12g %.12g\n", |
| 591 |
fa->farg[3], fa->farg[4], fa->farg[5]); |
| 592 |
if (fa->farg[6] < fa->farg[7]) |
| 593 |
printf("ring cent %.12g %.12g\n", |
| 594 |
fa->farg[6], fa->farg[7]); |
| 595 |
else |
| 596 |
printf("ring cent %.12g %.12g\n", |
| 597 |
fa->farg[7], fa->farg[6]); |
| 598 |
return(0); |
| 599 |
} |
| 600 |
|
| 601 |
|
| 602 |
int |
| 603 |
o_instance( /* convert an instance (or mesh) */ |
| 604 |
char *mod, |
| 605 |
char *typ, |
| 606 |
char *id, |
| 607 |
FUNARGS *fa |
| 608 |
) |
| 609 |
{ |
| 610 |
int i; |
| 611 |
char *cp; |
| 612 |
char *start = NULL, *end = NULL; |
| 613 |
/* |
| 614 |
* We don't really know how to do this, so we just create |
| 615 |
* a reference to an undefined MGF file and it's the user's |
| 616 |
* responsibility to create this file and put the appropriate |
| 617 |
* stuff into it. |
| 618 |
*/ |
| 619 |
if (fa->nsargs < 1) |
| 620 |
return(-1); |
| 621 |
setmat(mod); /* only works if surfaces are void */ |
| 622 |
setobj(id); |
| 623 |
for (cp = fa->sarg[0]; *cp; cp++) /* construct MGF file name */ |
| 624 |
if (*cp == '/') |
| 625 |
start = cp+1; |
| 626 |
else if (*cp == '.') |
| 627 |
end = cp; |
| 628 |
if (start == NULL) |
| 629 |
start = fa->sarg[0]; |
| 630 |
if (end == NULL || start >= end) |
| 631 |
end = cp; |
| 632 |
fputs("i ", stdout); /* print include entity */ |
| 633 |
for (cp = start; cp < end; cp++) |
| 634 |
putchar(*cp); |
| 635 |
fputs(".mgf", stdout); /* add MGF suffix */ |
| 636 |
for (i = 1; i < fa->nsargs; i++) { /* add transform */ |
| 637 |
putchar(' '); |
| 638 |
fputs(fa->sarg[i], stdout); |
| 639 |
} |
| 640 |
putchar('\n'); |
| 641 |
clrverts(); /* vertex id's no longer reliable */ |
| 642 |
return(0); |
| 643 |
} |
| 644 |
|
| 645 |
|
| 646 |
int |
| 647 |
o_illum( /* convert an illum material */ |
| 648 |
char *mod, |
| 649 |
char *typ, |
| 650 |
char *id, |
| 651 |
FUNARGS *fa |
| 652 |
) |
| 653 |
{ |
| 654 |
if (fa->nsargs == 1 && strcmp(fa->sarg[0], VOIDID)) { |
| 655 |
newmat(id, fa->sarg[0]); /* just create alias */ |
| 656 |
return(0); |
| 657 |
} |
| 658 |
/* else create invisible material */ |
| 659 |
newmat(id, NULL); |
| 660 |
puts("\tts 1 0"); |
| 661 |
return(0); |
| 662 |
} |
| 663 |
|
| 664 |
|
| 665 |
int |
| 666 |
o_plastic( /* convert a plastic material */ |
| 667 |
char *mod, |
| 668 |
char *typ, |
| 669 |
char *id, |
| 670 |
FUNARGS *fa |
| 671 |
) |
| 672 |
{ |
| 673 |
COLOR cxyz, rrgb; |
| 674 |
double d; |
| 675 |
|
| 676 |
if (fa->nfargs != (typ[7]=='2' ? 6 : 5)) |
| 677 |
return(-1); |
| 678 |
newmat(id, NULL); |
| 679 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
| 680 |
rgb_cie(cxyz, rrgb); |
| 681 |
puts("\tc"); /* put diffuse component */ |
| 682 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 683 |
if (d > FTINY) |
| 684 |
printf("\t\tcxy %.6f %.6f\n", cxyz[0]/d, cxyz[1]/d); |
| 685 |
printf("\trd %.6f\n", cxyz[1]*(1. - fa->farg[3])); |
| 686 |
if (fa->farg[3] > FTINY) { /* put specular component */ |
| 687 |
puts("\tc"); |
| 688 |
printf("\trs %.6f %.6f\n", fa->farg[3], |
| 689 |
typ[7]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
| 690 |
fa->farg[4]); |
| 691 |
} |
| 692 |
return(0); |
| 693 |
} |
| 694 |
|
| 695 |
|
| 696 |
int |
| 697 |
o_metal( /* convert a metal material */ |
| 698 |
char *mod, |
| 699 |
char *typ, |
| 700 |
char *id, |
| 701 |
FUNARGS *fa |
| 702 |
) |
| 703 |
{ |
| 704 |
COLOR cxyz, rrgb; |
| 705 |
double d; |
| 706 |
|
| 707 |
if (fa->nfargs != (typ[5]=='2' ? 6 : 5)) |
| 708 |
return(-1); |
| 709 |
newmat(id, NULL); |
| 710 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
| 711 |
rgb_cie(cxyz, rrgb); |
| 712 |
puts("\tc"); /* put diffuse component */ |
| 713 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 714 |
if (d > FTINY) |
| 715 |
printf("\t\tcxy %.6f %.6f\n", cxyz[0]/d, cxyz[1]/d); |
| 716 |
printf("\trd %.6f\n", cxyz[1]*(1. - fa->farg[3])); |
| 717 |
/* put specular component */ |
| 718 |
printf("\trs %.6f %.6f\n", cxyz[1]*fa->farg[3], |
| 719 |
typ[5]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
| 720 |
fa->farg[4]); |
| 721 |
return(0); |
| 722 |
} |
| 723 |
|
| 724 |
|
| 725 |
int |
| 726 |
o_glass( /* convert a glass material */ |
| 727 |
char *mod, |
| 728 |
char *typ, |
| 729 |
char *id, |
| 730 |
FUNARGS *fa |
| 731 |
) |
| 732 |
{ |
| 733 |
COLOR cxyz, rrgb, trgb; |
| 734 |
double nrfr = 1.52, F, d; |
| 735 |
int i; |
| 736 |
|
| 737 |
if (fa->nfargs != 3 && fa->nfargs != 4) |
| 738 |
return(-1); |
| 739 |
newmat(id, NULL); |
| 740 |
if (fa->nfargs == 4) |
| 741 |
nrfr = fa->farg[3]; |
| 742 |
printf("\tir %f 0\n", nrfr); |
| 743 |
F = (1. - nrfr)/(1. + nrfr); /* use normal incidence */ |
| 744 |
F *= F; |
| 745 |
for (i = 0; i < 3; i++) { |
| 746 |
trgb[i] = fa->farg[i] * (1. - F)*(1. - F) / |
| 747 |
(1. - F*F*fa->farg[i]*fa->farg[i]); |
| 748 |
rrgb[i] = F * (1. + (1. - 2.*F)*fa->farg[i]) / |
| 749 |
(1. - F*F*fa->farg[i]*fa->farg[i]); |
| 750 |
} |
| 751 |
rgb_cie(cxyz, rrgb); /* put reflected component */ |
| 752 |
puts("\tc"); |
| 753 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 754 |
if (d > FTINY) |
| 755 |
printf("\t\tcxy %.6f %.6f\n", cxyz[0]/d, cxyz[1]/d); |
| 756 |
printf("\trs %.6f 0\n", cxyz[1]); |
| 757 |
rgb_cie(cxyz, trgb); /* put transmitted component */ |
| 758 |
puts("\tc"); |
| 759 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 760 |
if (d > FTINY) |
| 761 |
printf("\t\tcxy %.6f %.6f\n", cxyz[0]/d, cxyz[1]/d); |
| 762 |
printf("\tts %.6f 0\n", cxyz[1]); |
| 763 |
return(0); |
| 764 |
} |
| 765 |
|
| 766 |
|
| 767 |
int |
| 768 |
o_dielectric( /* convert a dielectric material */ |
| 769 |
char *mod, |
| 770 |
char *typ, |
| 771 |
char *id, |
| 772 |
FUNARGS *fa |
| 773 |
) |
| 774 |
{ |
| 775 |
COLOR cxyz, trgb; |
| 776 |
double F, d; |
| 777 |
int i; |
| 778 |
|
| 779 |
if (fa->nfargs != 5) |
| 780 |
return(-1); |
| 781 |
newmat(id, NULL); |
| 782 |
F = (1. - fa->farg[3])/(1. + fa->farg[3]); /* normal incidence */ |
| 783 |
F *= F; |
| 784 |
for (i = 0; i < 3; i++) |
| 785 |
trgb[i] = (1. - F)*pow(fa->farg[i], C_1SIDEDTHICK/unit_mult); |
| 786 |
printf("\tir %f 0\n", fa->farg[3]); /* put index of refraction */ |
| 787 |
printf("\tsides 1\n"); |
| 788 |
puts("\tc"); /* put reflected component */ |
| 789 |
printf("\trs %.6f 0\n", F); |
| 790 |
rgb_cie(cxyz, trgb); /* put transmitted component */ |
| 791 |
puts("\tc"); |
| 792 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 793 |
if (d > FTINY) |
| 794 |
printf("\t\tcxy %.6f %.6f\n", cxyz[0]/d, cxyz[1]/d); |
| 795 |
printf("\tts %.6f 0\n", cxyz[1]); |
| 796 |
return(0); |
| 797 |
} |
| 798 |
|
| 799 |
|
| 800 |
int |
| 801 |
o_mirror( /* convert a mirror material */ |
| 802 |
char *mod, |
| 803 |
char *typ, |
| 804 |
char *id, |
| 805 |
FUNARGS *fa |
| 806 |
) |
| 807 |
{ |
| 808 |
COLOR cxyz, rrgb; |
| 809 |
double d; |
| 810 |
|
| 811 |
if (fa->nsargs == 1) { /* use alternate material */ |
| 812 |
newmat(id, fa->sarg[0]); |
| 813 |
return(0); |
| 814 |
} |
| 815 |
if (fa->nfargs != 3) |
| 816 |
return(-1); |
| 817 |
newmat(id, NULL); |
| 818 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
| 819 |
rgb_cie(cxyz, rrgb); |
| 820 |
puts("\tc"); /* put specular component */ |
| 821 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 822 |
if (d > FTINY) |
| 823 |
printf("\t\tcxy %.6f %.6f\n", cxyz[0]/d, cxyz[1]/d); |
| 824 |
printf("\trs %.6f 0\n", cxyz[1]); |
| 825 |
return(0); |
| 826 |
} |
| 827 |
|
| 828 |
|
| 829 |
int |
| 830 |
o_trans( /* convert a trans material */ |
| 831 |
char *mod, |
| 832 |
char *typ, |
| 833 |
char *id, |
| 834 |
FUNARGS *fa |
| 835 |
) |
| 836 |
{ |
| 837 |
COLOR cxyz, rrgb; |
| 838 |
double rough, trans, tspec, d; |
| 839 |
|
| 840 |
if (typ[5] == '2') { /* trans2 */ |
| 841 |
if (fa->nfargs != 8) |
| 842 |
return(-1); |
| 843 |
rough = .5*(fa->farg[4] + fa->farg[5]); |
| 844 |
trans = fa->farg[6]; |
| 845 |
tspec = fa->farg[7]; |
| 846 |
} else { /* trans */ |
| 847 |
if (fa->nfargs != 7) |
| 848 |
return(-1); |
| 849 |
rough = fa->farg[4]; |
| 850 |
trans = fa->farg[5]; |
| 851 |
tspec = fa->farg[6]; |
| 852 |
} |
| 853 |
newmat(id, NULL); |
| 854 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
| 855 |
rgb_cie(cxyz, rrgb); |
| 856 |
puts("\tc"); /* put transmitted diffuse */ |
| 857 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 858 |
if (d > FTINY) |
| 859 |
printf("\t\tcxy %.6f %.6f\n", cxyz[0]/d, cxyz[1]/d); |
| 860 |
printf("\ttd %.6f\n", cxyz[1]*trans*(1. - fa->farg[3])*(1. - tspec)); |
| 861 |
/* put transmitted specular */ |
| 862 |
printf("\tts %.6f %.6f\n", cxyz[1]*trans*tspec*(1. - fa->farg[3]), rough); |
| 863 |
/* put reflected diffuse */ |
| 864 |
printf("\trd %.6f\n", cxyz[1]*(1. - fa->farg[3])*(1. - trans)); |
| 865 |
puts("\tc"); /* put reflected specular */ |
| 866 |
printf("\trs %.6f %.6f\n", fa->farg[3], rough); |
| 867 |
return(0); |
| 868 |
} |
| 869 |
|
| 870 |
|
| 871 |
int |
| 872 |
o_light( /* convert a light type */ |
| 873 |
char *mod, |
| 874 |
char *typ, |
| 875 |
char *id, |
| 876 |
FUNARGS *fa |
| 877 |
) |
| 878 |
{ |
| 879 |
COLOR cxyz, rrgb; |
| 880 |
double d; |
| 881 |
|
| 882 |
if (fa->nfargs < 3) |
| 883 |
return(-1); |
| 884 |
newmat(id, NULL); |
| 885 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
| 886 |
rgb_cie(cxyz, rrgb); |
| 887 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 888 |
puts("\tc"); |
| 889 |
if (d > FTINY) |
| 890 |
printf("\t\tcxy %.6f %.6f\n", cxyz[0]/d, cxyz[1]/d); |
| 891 |
printf("\ted %.4g\n", cxyz[1]*(PI*WHTEFFICACY)); |
| 892 |
return(0); |
| 893 |
} |
