1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rad2mgf.c,v 2.22 2003/11/15 16:29:11 schorsch Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Convert Radiance scene description to MGF |
6 |
*/ |
7 |
|
8 |
#include <ctype.h> |
9 |
#include <string.h> |
10 |
#include <stdio.h> |
11 |
|
12 |
#include "platform.h" |
13 |
#include "rtmath.h" |
14 |
#include "rtio.h" |
15 |
#include "rtprocess.h" |
16 |
#include "object.h" |
17 |
#include "color.h" |
18 |
#include "lookup.h" |
19 |
|
20 |
#define C_1SIDEDTHICK 0.005 |
21 |
|
22 |
|
23 |
LUTAB rmats = LU_SINIT(free,NULL); /* defined material table */ |
24 |
|
25 |
LUTAB rdispatch = LU_SINIT(NULL,NULL); /* function dispatch table */ |
26 |
|
27 |
char curmat[80]; /* current material */ |
28 |
char curobj[128] = "Untitled"; /* current object name */ |
29 |
|
30 |
double unit_mult = 1.; /* units multiplier */ |
31 |
|
32 |
#define hasmult (unit_mult < .999 || unit_mult > 1.001) |
33 |
|
34 |
/* |
35 |
* Stuff for tracking and reusing vertices: |
36 |
*/ |
37 |
|
38 |
char VKFMT[] = "%+16.9e %+16.9e %+16.9e"; |
39 |
#define VKLEN 64 |
40 |
|
41 |
#define mkvkey(k,v) sprintf(k, VKFMT, (v)[0], (v)[1], (v)[2]) |
42 |
|
43 |
#define NVERTS 256 |
44 |
|
45 |
long vclock; /* incremented at each vertex request */ |
46 |
|
47 |
struct vert { |
48 |
long lused; /* when last used (0 if unassigned) */ |
49 |
FVECT p; /* track point position only */ |
50 |
} vert[NVERTS]; /* our vertex cache */ |
51 |
|
52 |
LUTAB vertab = LU_SINIT(free,NULL); /* our vertex lookup table */ |
53 |
|
54 |
static void rad2mgf(char *inp); |
55 |
static void cvtprim(char *inp, char *mod, char *typ, char *id, FUNARGS *fa); |
56 |
static void newmat(char *id, char *alias); |
57 |
static void setmat(char *id); |
58 |
static void setobj(char *id); |
59 |
static void init(void); |
60 |
static void uninit(void); |
61 |
static void clrverts(void); |
62 |
static void add2dispatch(char *name, int (*func)()); |
63 |
static char *getvertid(char *vname, FVECT vp); |
64 |
static int o_unsupported(char *mod, char *typ, char *id, FUNARGS *fa); |
65 |
static int o_face(char *mod, char *typ, char *id, FUNARGS *fa); |
66 |
static int o_cone(char *mod, char *typ, char *id, FUNARGS *fa); |
67 |
static int o_sphere(char *mod, char *typ, char *id, FUNARGS *fa); |
68 |
static int o_cylinder(char *mod, char *typ, char *id, FUNARGS *fa); |
69 |
static int o_ring(char *mod, char *typ, char *id, FUNARGS *fa); |
70 |
static int o_instance(char *mod, char *typ, char *id, FUNARGS *fa); |
71 |
static int o_illum(char *mod, char *typ, char *id, FUNARGS *fa); |
72 |
static int o_plastic(char *mod, char *typ, char *id, FUNARGS *fa); |
73 |
static int o_metal(char *mod, char *typ, char *id, FUNARGS *fa); |
74 |
static int o_glass(char *mod, char *typ, char *id, FUNARGS *fa); |
75 |
static int o_dielectric(char *mod, char *typ, char *id, FUNARGS *fa); |
76 |
static int o_mirror(char *mod, char *typ, char *id, FUNARGS *fa); |
77 |
static int o_trans(char *mod, char *typ, char *id, FUNARGS *fa); |
78 |
static int o_light(char *mod, char *typ, char *id, FUNARGS *fa); |
79 |
|
80 |
|
81 |
int |
82 |
main( |
83 |
int argc, |
84 |
char **argv |
85 |
) |
86 |
{ |
87 |
int i; |
88 |
|
89 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
90 |
switch (argv[i][1]) { |
91 |
case 'd': /* units */ |
92 |
switch (argv[i][2]) { |
93 |
case 'm': /* meters */ |
94 |
unit_mult = 1.; |
95 |
break; |
96 |
case 'c': /* centimeters */ |
97 |
unit_mult = .01; |
98 |
break; |
99 |
case 'f': /* feet */ |
100 |
unit_mult = 12.*.0254; |
101 |
break; |
102 |
case 'i': /* inches */ |
103 |
unit_mult = .0254; |
104 |
break; |
105 |
default: |
106 |
goto unkopt; |
107 |
} |
108 |
break; |
109 |
default: |
110 |
goto unkopt; |
111 |
} |
112 |
init(); |
113 |
if (i >= argc) |
114 |
rad2mgf(NULL); |
115 |
else |
116 |
for ( ; i < argc; i++) |
117 |
rad2mgf(argv[i]); |
118 |
uninit(); |
119 |
exit(0); |
120 |
unkopt: |
121 |
fprintf(stderr, "Usage: %s [-d{m|c|f|i}] file ..\n", argv[0]); |
122 |
exit(1); |
123 |
} |
124 |
|
125 |
|
126 |
void |
127 |
rad2mgf( /* convert a Radiance file to MGF */ |
128 |
char *inp |
129 |
) |
130 |
{ |
131 |
#define mod buf |
132 |
#define typ (buf+128) |
133 |
#define id (buf+256) |
134 |
#define alias (buf+384) |
135 |
char buf[512]; |
136 |
FUNARGS fa; |
137 |
register FILE *fp; |
138 |
register int c; |
139 |
|
140 |
if (inp == NULL) { |
141 |
inp = "standard input"; |
142 |
fp = stdin; |
143 |
} else if (inp[0] == '!') { |
144 |
if ((fp = popen(inp+1, "r")) == NULL) { |
145 |
fputs(inp, stderr); |
146 |
fputs(": cannot execute\n", stderr); |
147 |
exit(1); |
148 |
} |
149 |
} else if ((fp = fopen(inp, "r")) == NULL) { |
150 |
fputs(inp, stderr); |
151 |
fputs(": cannot open\n", stderr); |
152 |
exit(1); |
153 |
} |
154 |
printf("# Begin conversion from: %s\n", inp); |
155 |
while ((c = getc(fp)) != EOF) |
156 |
switch (c) { |
157 |
case ' ': /* white space */ |
158 |
case '\t': |
159 |
case '\n': |
160 |
case '\r': |
161 |
case '\f': |
162 |
break; |
163 |
case '#': /* comment */ |
164 |
if (fgets(buf, sizeof(buf), fp) != NULL) |
165 |
printf("# %s", buf); |
166 |
break; |
167 |
case '!': /* inline command */ |
168 |
ungetc(c, fp); |
169 |
fgetline(buf, sizeof(buf), fp); |
170 |
rad2mgf(buf); |
171 |
break; |
172 |
default: /* Radiance primitive */ |
173 |
ungetc(c, fp); |
174 |
if (fscanf(fp, "%s %s %s", mod, typ, id) != 3) { |
175 |
fputs(inp, stderr); |
176 |
fputs(": unexpected EOF\n", stderr); |
177 |
exit(1); |
178 |
} |
179 |
if (!strcmp(typ, "alias")) { |
180 |
strcpy(alias, "EOF"); |
181 |
fscanf(fp, "%s", alias); |
182 |
newmat(id, alias); |
183 |
} else { |
184 |
if (!readfargs(&fa, fp)) { |
185 |
fprintf(stderr, |
186 |
"%s: bad argument syntax for %s \"%s\"\n", |
187 |
inp, typ, id); |
188 |
exit(1); |
189 |
} |
190 |
cvtprim(inp, mod, typ, id, &fa); |
191 |
freefargs(&fa); |
192 |
} |
193 |
break; |
194 |
} |
195 |
printf("# End conversion from: %s\n", inp); |
196 |
if (inp[0] == '!') |
197 |
pclose(fp); |
198 |
else |
199 |
fclose(fp); |
200 |
#undef mod |
201 |
#undef typ |
202 |
#undef id |
203 |
#undef alias |
204 |
} |
205 |
|
206 |
|
207 |
void |
208 |
cvtprim( /* process Radiance primitive */ |
209 |
char *inp, |
210 |
char *mod, |
211 |
char *typ, |
212 |
char *id, |
213 |
FUNARGS *fa |
214 |
) |
215 |
{ |
216 |
int (*df)(); |
217 |
|
218 |
df = (int (*)())lu_find(&rdispatch, typ)->data; |
219 |
if (df != NULL) { /* convert */ |
220 |
if ((*df)(mod, typ, id, fa) < 0) { |
221 |
fprintf(stderr, "%s: bad %s \"%s\"\n", "rat2mgf", typ, id); |
222 |
exit(1); |
223 |
} |
224 |
} else { /* unsupported */ |
225 |
o_unsupported(mod, typ, id, fa); |
226 |
if (lu_find(&rmats, mod)->data != NULL) /* make alias */ |
227 |
newmat(id, mod); |
228 |
} |
229 |
} |
230 |
|
231 |
|
232 |
void |
233 |
newmat( /* add a modifier to the alias list */ |
234 |
char *id, |
235 |
char *alias |
236 |
) |
237 |
{ |
238 |
register LUENT *lp, *lpa; |
239 |
|
240 |
if (alias != NULL) { /* look up alias */ |
241 |
if ((lpa = lu_find(&rmats, alias)) == NULL) |
242 |
goto memerr; |
243 |
if (lpa->data == NULL) |
244 |
alias = NULL; /* doesn't exist! */ |
245 |
} |
246 |
if ((lp = lu_find(&rmats, id)) == NULL) /* look up material */ |
247 |
goto memerr; |
248 |
if (alias != NULL && lp->data == lpa->key) |
249 |
return; /* alias set already */ |
250 |
if (lp->data == NULL) { /* allocate material */ |
251 |
if ((lp->key = (char *)malloc(strlen(id)+1)) == NULL) |
252 |
goto memerr; |
253 |
strcpy(lp->key, id); |
254 |
} |
255 |
if (alias == NULL) { /* set this material */ |
256 |
lp->data = lp->key; |
257 |
printf("m %s =\n", id); |
258 |
} else { /* set this alias */ |
259 |
lp->data = lpa->key; |
260 |
printf("m %s = %s\n", id, alias); |
261 |
} |
262 |
strcpy(curmat, id); |
263 |
return; |
264 |
memerr: |
265 |
fputs("Out of memory in newmat!\n", stderr); |
266 |
exit(1); |
267 |
} |
268 |
|
269 |
|
270 |
void |
271 |
setmat( /* set material to this one */ |
272 |
char *id |
273 |
) |
274 |
{ |
275 |
if (!strcmp(id, curmat)) /* already set? */ |
276 |
return; |
277 |
if (!strcmp(id, VOIDID)) /* cannot set */ |
278 |
return; |
279 |
printf("m %s\n", id); |
280 |
strcpy(curmat, id); |
281 |
} |
282 |
|
283 |
|
284 |
void |
285 |
setobj( /* set object name to this one */ |
286 |
char *id |
287 |
) |
288 |
{ |
289 |
register char *cp, *cp2; |
290 |
char *end = NULL; |
291 |
int diff = 0; |
292 |
/* use all but final suffix */ |
293 |
for (cp = id; *cp; cp++) |
294 |
if (*cp == '.') |
295 |
end = cp; |
296 |
if (end == NULL) |
297 |
end = cp; |
298 |
/* copy to current object */ |
299 |
cp2 = curobj; |
300 |
if (!isalpha(*id)) { /* start with letter */ |
301 |
diff = *cp2 != 'O'; |
302 |
*cp2++ = 'O'; |
303 |
} |
304 |
for (cp = id; cp < end; *cp2++ = *cp++) { |
305 |
if ((*cp < '!') | (*cp > '~')) /* limit to visible chars */ |
306 |
*cp = '?'; |
307 |
diff += *cp != *cp2; |
308 |
} |
309 |
if (!diff && !*cp2) |
310 |
return; |
311 |
*cp2 = '\0'; |
312 |
fputs("o\no ", stdout); |
313 |
puts(curobj); |
314 |
} |
315 |
|
316 |
|
317 |
void |
318 |
init(void) /* initialize dispatch table and output */ |
319 |
{ |
320 |
lu_init(&vertab, NVERTS); |
321 |
lu_init(&rdispatch, 22); |
322 |
add2dispatch("polygon", o_face); |
323 |
add2dispatch("cone", o_cone); |
324 |
add2dispatch("cup", o_cone); |
325 |
add2dispatch("sphere", o_sphere); |
326 |
add2dispatch("bubble", o_sphere); |
327 |
add2dispatch("cylinder", o_cylinder); |
328 |
add2dispatch("tube", o_cylinder); |
329 |
add2dispatch("ring", o_ring); |
330 |
add2dispatch("instance", o_instance); |
331 |
add2dispatch("mesh", o_instance); |
332 |
add2dispatch("plastic", o_plastic); |
333 |
add2dispatch("plastic2", o_plastic); |
334 |
add2dispatch("metal", o_metal); |
335 |
add2dispatch("metal2", o_metal); |
336 |
add2dispatch("glass", o_glass); |
337 |
add2dispatch("dielectric", o_dielectric); |
338 |
add2dispatch("trans", o_trans); |
339 |
add2dispatch("trans2", o_trans); |
340 |
add2dispatch("mirror", o_mirror); |
341 |
add2dispatch("light", o_light); |
342 |
add2dispatch("spotlight", o_light); |
343 |
add2dispatch("glow", o_light); |
344 |
add2dispatch("illum", o_illum); |
345 |
puts("# The following was converted from RADIANCE scene input"); |
346 |
if (hasmult) |
347 |
printf("xf -s %.4e\n", unit_mult); |
348 |
printf("o %s\n", curobj); |
349 |
} |
350 |
|
351 |
|
352 |
void |
353 |
uninit(void) /* mark end of MGF file */ |
354 |
{ |
355 |
puts("o"); |
356 |
if (hasmult) |
357 |
puts("xf"); |
358 |
puts("# End of data converted from RADIANCE scene input"); |
359 |
lu_done(&rdispatch); |
360 |
lu_done(&rmats); |
361 |
lu_done(&vertab); |
362 |
} |
363 |
|
364 |
|
365 |
void |
366 |
clrverts(void) /* clear vertex table */ |
367 |
{ |
368 |
register int i; |
369 |
|
370 |
lu_done(&vertab); |
371 |
for (i = 0; i < NVERTS; i++) |
372 |
vert[i].lused = 0; |
373 |
lu_init(&vertab, NVERTS); |
374 |
} |
375 |
|
376 |
|
377 |
void |
378 |
add2dispatch( /* add function to dispatch table */ |
379 |
char *name, |
380 |
int (*func)() |
381 |
) |
382 |
{ |
383 |
register LUENT *lp; |
384 |
|
385 |
lp = lu_find(&rdispatch, name); |
386 |
if (lp->key != NULL) { |
387 |
fputs(name, stderr); |
388 |
fputs(": duplicate dispatch entry!\n", stderr); |
389 |
exit(1); |
390 |
} |
391 |
lp->key = name; |
392 |
lp->data = (char *)func; |
393 |
} |
394 |
|
395 |
|
396 |
char * |
397 |
getvertid( /* get/set vertex ID for this point */ |
398 |
char *vname, |
399 |
FVECT vp |
400 |
) |
401 |
{ |
402 |
static char vkey[VKLEN]; |
403 |
register LUENT *lp; |
404 |
register int i, vndx; |
405 |
|
406 |
vclock++; /* increment counter */ |
407 |
mkvkey(vkey, vp); |
408 |
if ((lp = lu_find(&vertab, vkey)) == NULL) |
409 |
goto memerr; |
410 |
if (lp->data == NULL) { /* allocate new vertex entry */ |
411 |
if (lp->key != NULL) /* reclaim deleted entry */ |
412 |
vertab.ndel--; |
413 |
else { |
414 |
if ((lp->key = (char *)malloc(VKLEN)) == NULL) |
415 |
goto memerr; |
416 |
strcpy(lp->key, vkey); |
417 |
} |
418 |
vndx = 0; /* find oldest vertex */ |
419 |
for (i = 1; i < NVERTS; i++) |
420 |
if (vert[i].lused < vert[vndx].lused) |
421 |
vndx = i; |
422 |
if (vert[vndx].lused) { /* free old entry first */ |
423 |
mkvkey(vkey, vert[vndx].p); |
424 |
lu_delete(&vertab, vkey); |
425 |
} |
426 |
VCOPY(vert[vndx].p, vp); /* assign it */ |
427 |
printf("v v%d =\n\tp %.15g %.15g %.15g\n", /* print it */ |
428 |
vndx, vp[0], vp[1], vp[2]); |
429 |
lp->data = (char *)&vert[vndx]; /* set it */ |
430 |
} else |
431 |
vndx = (struct vert *)lp->data - vert; |
432 |
vert[vndx].lused = vclock; /* record this use */ |
433 |
sprintf(vname, "v%d", vndx); |
434 |
return(vname); |
435 |
memerr: |
436 |
fputs("Out of memory in getvertid!\n", stderr); |
437 |
exit(1); |
438 |
} |
439 |
|
440 |
|
441 |
int |
442 |
o_unsupported( /* mark unsupported primitive */ |
443 |
char *mod, |
444 |
char *typ, |
445 |
char *id, |
446 |
FUNARGS *fa |
447 |
) |
448 |
{ |
449 |
register int i; |
450 |
|
451 |
fputs("\n# Unsupported RADIANCE primitive:\n", stdout); |
452 |
printf("# %s %s %s", mod, typ, id); |
453 |
printf("\n# %d", fa->nsargs); |
454 |
for (i = 0; i < fa->nsargs; i++) |
455 |
printf(" %s", fa->sarg[i]); |
456 |
#ifdef IARGS |
457 |
printf("\n# %d", fa->niargs); |
458 |
for (i = 0; i < fa->niargs; i++) |
459 |
printf(" %ld", fa->iarg[i]); |
460 |
#else |
461 |
fputs("\n# 0", stdout); |
462 |
#endif |
463 |
printf("\n# %d", fa->nfargs); |
464 |
for (i = 0; i < fa->nfargs; i++) |
465 |
printf(" %g", fa->farg[i]); |
466 |
fputs("\n\n", stdout); |
467 |
return(0); |
468 |
} |
469 |
|
470 |
|
471 |
int |
472 |
o_face( /* print out a polygon */ |
473 |
char *mod, |
474 |
char *typ, |
475 |
char *id, |
476 |
FUNARGS *fa |
477 |
) |
478 |
{ |
479 |
char entbuf[2048], *linestart; |
480 |
register char *cp; |
481 |
register int i; |
482 |
|
483 |
if ((fa->nfargs < 9) | (fa->nfargs % 3)) |
484 |
return(-1); |
485 |
setmat(mod); |
486 |
setobj(id); |
487 |
cp = linestart = entbuf; |
488 |
*cp++ = 'f'; |
489 |
for (i = 0; i < fa->nfargs; i += 3) { |
490 |
*cp++ = ' '; |
491 |
if (cp - linestart > 72) { |
492 |
*cp++ = '\\'; *cp++ = '\n'; |
493 |
linestart = cp; |
494 |
*cp++ = ' '; *cp++ = ' '; |
495 |
} |
496 |
getvertid(cp, fa->farg + i); |
497 |
while (*cp) |
498 |
cp++; |
499 |
} |
500 |
puts(entbuf); |
501 |
return(0); |
502 |
} |
503 |
|
504 |
|
505 |
int |
506 |
o_cone( /* print out a cone */ |
507 |
char *mod, |
508 |
char *typ, |
509 |
char *id, |
510 |
register FUNARGS *fa |
511 |
) |
512 |
{ |
513 |
char v1[6], v2[6]; |
514 |
|
515 |
if (fa->nfargs != 8) |
516 |
return(-1); |
517 |
setmat(mod); |
518 |
setobj(id); |
519 |
getvertid(v1, fa->farg); |
520 |
getvertid(v2, fa->farg + 3); |
521 |
if (typ[1] == 'u') /* cup -> inverted cone */ |
522 |
printf("cone %s %.12g %s %.12g\n", |
523 |
v1, -fa->farg[6], v2, -fa->farg[7]); |
524 |
else |
525 |
printf("cone %s %.12g %s %.12g\n", |
526 |
v1, fa->farg[6], v2, fa->farg[7]); |
527 |
return(0); |
528 |
} |
529 |
|
530 |
|
531 |
int |
532 |
o_sphere( /* print out a sphere */ |
533 |
char *mod, |
534 |
char *typ, |
535 |
char *id, |
536 |
register FUNARGS *fa |
537 |
) |
538 |
{ |
539 |
char cent[6]; |
540 |
|
541 |
if (fa->nfargs != 4) |
542 |
return(-1); |
543 |
setmat(mod); |
544 |
setobj(id); |
545 |
printf("sph %s %.12g\n", getvertid(cent, fa->farg), |
546 |
typ[0]=='b' ? -fa->farg[3] : fa->farg[3]); |
547 |
return(0); |
548 |
} |
549 |
|
550 |
|
551 |
int |
552 |
o_cylinder( /* print out a cylinder */ |
553 |
char *mod, |
554 |
char *typ, |
555 |
char *id, |
556 |
register FUNARGS *fa |
557 |
) |
558 |
{ |
559 |
char v1[6], v2[6]; |
560 |
|
561 |
if (fa->nfargs != 7) |
562 |
return(-1); |
563 |
setmat(mod); |
564 |
setobj(id); |
565 |
getvertid(v1, fa->farg); |
566 |
getvertid(v2, fa->farg + 3); |
567 |
printf("cyl %s %.12g %s\n", v1, |
568 |
typ[0]=='t' ? -fa->farg[6] : fa->farg[6], v2); |
569 |
return(0); |
570 |
} |
571 |
|
572 |
|
573 |
int |
574 |
o_ring( /* print out a ring */ |
575 |
char *mod, |
576 |
char *typ, |
577 |
char *id, |
578 |
register FUNARGS *fa |
579 |
) |
580 |
{ |
581 |
if (fa->nfargs != 8) |
582 |
return(-1); |
583 |
setmat(mod); |
584 |
setobj(id); |
585 |
printf("v cent =\n\tp %.12g %.12g %.12g\n", |
586 |
fa->farg[0], fa->farg[1], fa->farg[2]); |
587 |
printf("\tn %.12g %.12g %.12g\n", |
588 |
fa->farg[3], fa->farg[4], fa->farg[5]); |
589 |
if (fa->farg[6] < fa->farg[7]) |
590 |
printf("ring cent %.12g %.12g\n", |
591 |
fa->farg[6], fa->farg[7]); |
592 |
else |
593 |
printf("ring cent %.12g %.12g\n", |
594 |
fa->farg[7], fa->farg[6]); |
595 |
return(0); |
596 |
} |
597 |
|
598 |
|
599 |
int |
600 |
o_instance( /* convert an instance (or mesh) */ |
601 |
char *mod, |
602 |
char *typ, |
603 |
char *id, |
604 |
FUNARGS *fa |
605 |
) |
606 |
{ |
607 |
register int i; |
608 |
register char *cp; |
609 |
char *start = NULL, *end = NULL; |
610 |
/* |
611 |
* We don't really know how to do this, so we just create |
612 |
* a reference to an undefined MGF file and it's the user's |
613 |
* responsibility to create this file and put the appropriate |
614 |
* stuff into it. |
615 |
*/ |
616 |
if (fa->nsargs < 1) |
617 |
return(-1); |
618 |
setmat(mod); /* only works if surfaces are void */ |
619 |
setobj(id); |
620 |
for (cp = fa->sarg[0]; *cp; cp++) /* construct MGF file name */ |
621 |
if (*cp == '/') |
622 |
start = cp+1; |
623 |
else if (*cp == '.') |
624 |
end = cp; |
625 |
if (start == NULL) |
626 |
start = fa->sarg[0]; |
627 |
if (end == NULL || start >= end) |
628 |
end = cp; |
629 |
fputs("i ", stdout); /* print include entity */ |
630 |
for (cp = start; cp < end; cp++) |
631 |
putchar(*cp); |
632 |
fputs(".mgf", stdout); /* add MGF suffix */ |
633 |
for (i = 1; i < fa->nsargs; i++) { /* add transform */ |
634 |
putchar(' '); |
635 |
fputs(fa->sarg[i], stdout); |
636 |
} |
637 |
putchar('\n'); |
638 |
clrverts(); /* vertex id's no longer reliable */ |
639 |
return(0); |
640 |
} |
641 |
|
642 |
|
643 |
int |
644 |
o_illum( /* convert an illum material */ |
645 |
char *mod, |
646 |
char *typ, |
647 |
char *id, |
648 |
FUNARGS *fa |
649 |
) |
650 |
{ |
651 |
if (fa->nsargs == 1 && strcmp(fa->sarg[0], VOIDID)) { |
652 |
newmat(id, fa->sarg[0]); /* just create alias */ |
653 |
return(0); |
654 |
} |
655 |
/* else create invisible material */ |
656 |
newmat(id, NULL); |
657 |
puts("\tts 1 0"); |
658 |
return(0); |
659 |
} |
660 |
|
661 |
|
662 |
int |
663 |
o_plastic( /* convert a plastic material */ |
664 |
char *mod, |
665 |
char *typ, |
666 |
char *id, |
667 |
register FUNARGS *fa |
668 |
) |
669 |
{ |
670 |
COLOR cxyz, rrgb; |
671 |
double d; |
672 |
|
673 |
if (fa->nfargs != (typ[7]=='2' ? 6 : 5)) |
674 |
return(-1); |
675 |
newmat(id, NULL); |
676 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
677 |
rgb_cie(cxyz, rrgb); |
678 |
puts("\tc"); /* put diffuse component */ |
679 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
680 |
if (d > FTINY) |
681 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
682 |
printf("\trd %.4f\n", cxyz[1]*(1. - fa->farg[3])); |
683 |
if (fa->farg[3] > FTINY) { /* put specular component */ |
684 |
puts("\tc"); |
685 |
printf("\trs %.4f %.4f\n", fa->farg[3], |
686 |
typ[7]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
687 |
fa->farg[4]); |
688 |
} |
689 |
return(0); |
690 |
} |
691 |
|
692 |
|
693 |
int |
694 |
o_metal( /* convert a metal material */ |
695 |
char *mod, |
696 |
char *typ, |
697 |
char *id, |
698 |
register FUNARGS *fa |
699 |
) |
700 |
{ |
701 |
COLOR cxyz, rrgb; |
702 |
double d; |
703 |
|
704 |
if (fa->nfargs != (typ[5]=='2' ? 6 : 5)) |
705 |
return(-1); |
706 |
newmat(id, NULL); |
707 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
708 |
rgb_cie(cxyz, rrgb); |
709 |
puts("\tc"); /* put diffuse component */ |
710 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
711 |
if (d > FTINY) |
712 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
713 |
printf("\trd %.4f\n", cxyz[1]*(1. - fa->farg[3])); |
714 |
/* put specular component */ |
715 |
printf("\trs %.4f %.4f\n", cxyz[1]*fa->farg[3], |
716 |
typ[5]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
717 |
fa->farg[4]); |
718 |
return(0); |
719 |
} |
720 |
|
721 |
|
722 |
int |
723 |
o_glass( /* convert a glass material */ |
724 |
char *mod, |
725 |
char *typ, |
726 |
char *id, |
727 |
register FUNARGS *fa |
728 |
) |
729 |
{ |
730 |
COLOR cxyz, rrgb, trgb; |
731 |
double nrfr = 1.52, F, d; |
732 |
register int i; |
733 |
|
734 |
if (fa->nfargs != 3 && fa->nfargs != 4) |
735 |
return(-1); |
736 |
newmat(id, NULL); |
737 |
if (fa->nfargs == 4) |
738 |
nrfr = fa->farg[3]; |
739 |
printf("\tir %f 0\n", nrfr); |
740 |
F = (1. - nrfr)/(1. + nrfr); /* use normal incidence */ |
741 |
F *= F; |
742 |
for (i = 0; i < 3; i++) { |
743 |
trgb[i] = fa->farg[i] * (1. - F)*(1. - F) / |
744 |
(1. - F*F*fa->farg[i]*fa->farg[i]); |
745 |
rrgb[i] = F * (1. + (1. - 2.*F)*fa->farg[i]) / |
746 |
(1. - F*F*fa->farg[i]*fa->farg[i]); |
747 |
} |
748 |
rgb_cie(cxyz, rrgb); /* put reflected component */ |
749 |
puts("\tc"); |
750 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
751 |
if (d > FTINY) |
752 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
753 |
printf("\trs %.4f 0\n", cxyz[1]); |
754 |
rgb_cie(cxyz, trgb); /* put transmitted component */ |
755 |
puts("\tc"); |
756 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
757 |
if (d > FTINY) |
758 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
759 |
printf("\tts %.4f 0\n", cxyz[1]); |
760 |
return(0); |
761 |
} |
762 |
|
763 |
|
764 |
int |
765 |
o_dielectric( /* convert a dielectric material */ |
766 |
char *mod, |
767 |
char *typ, |
768 |
char *id, |
769 |
register FUNARGS *fa |
770 |
) |
771 |
{ |
772 |
COLOR cxyz, trgb; |
773 |
double F, d; |
774 |
register int i; |
775 |
|
776 |
if (fa->nfargs != 5) |
777 |
return(-1); |
778 |
newmat(id, NULL); |
779 |
F = (1. - fa->farg[3])/(1. + fa->farg[3]); /* normal incidence */ |
780 |
F *= F; |
781 |
for (i = 0; i < 3; i++) |
782 |
trgb[i] = (1. - F)*pow(fa->farg[i], C_1SIDEDTHICK/unit_mult); |
783 |
printf("\tir %f 0\n", fa->farg[3]); /* put index of refraction */ |
784 |
printf("\tsides 1\n"); |
785 |
puts("\tc"); /* put reflected component */ |
786 |
printf("\trs %.4f 0\n", F); |
787 |
rgb_cie(cxyz, trgb); /* put transmitted component */ |
788 |
puts("\tc"); |
789 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
790 |
if (d > FTINY) |
791 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
792 |
printf("\tts %.4f 0\n", cxyz[1]); |
793 |
return(0); |
794 |
} |
795 |
|
796 |
|
797 |
int |
798 |
o_mirror( /* convert a mirror material */ |
799 |
char *mod, |
800 |
char *typ, |
801 |
char *id, |
802 |
register FUNARGS *fa |
803 |
) |
804 |
{ |
805 |
COLOR cxyz, rrgb; |
806 |
double d; |
807 |
|
808 |
if (fa->nsargs == 1) { /* use alternate material */ |
809 |
newmat(id, fa->sarg[0]); |
810 |
return(0); |
811 |
} |
812 |
if (fa->nfargs != 3) |
813 |
return(-1); |
814 |
newmat(id, NULL); |
815 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
816 |
rgb_cie(cxyz, rrgb); |
817 |
puts("\tc"); /* put specular component */ |
818 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
819 |
if (d > FTINY) |
820 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
821 |
printf("\trs %.4f 0\n", cxyz[1]); |
822 |
return(0); |
823 |
} |
824 |
|
825 |
|
826 |
int |
827 |
o_trans( /* convert a trans material */ |
828 |
char *mod, |
829 |
char *typ, |
830 |
char *id, |
831 |
register FUNARGS *fa |
832 |
) |
833 |
{ |
834 |
COLOR cxyz, rrgb; |
835 |
double rough, trans, tspec, d; |
836 |
|
837 |
if (typ[4] == '2') { /* trans2 */ |
838 |
if (fa->nfargs != 8) |
839 |
return(-1); |
840 |
rough = .5*(fa->farg[4] + fa->farg[5]); |
841 |
trans = fa->farg[6]; |
842 |
tspec = fa->farg[7]; |
843 |
} else { /* trans */ |
844 |
if (fa->nfargs != 7) |
845 |
return(-1); |
846 |
rough = fa->farg[4]; |
847 |
trans = fa->farg[5]; |
848 |
tspec = fa->farg[6]; |
849 |
} |
850 |
newmat(id, NULL); |
851 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
852 |
rgb_cie(cxyz, rrgb); |
853 |
puts("\tc"); /* put transmitted diffuse */ |
854 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
855 |
if (d > FTINY) |
856 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
857 |
printf("\ttd %.4f\n", cxyz[1]*trans*(1. - fa->farg[3])*(1. - tspec)); |
858 |
/* put transmitted specular */ |
859 |
printf("\tts %.4f %.4f\n", cxyz[1]*trans*tspec*(1. - fa->farg[3]), rough); |
860 |
/* put reflected diffuse */ |
861 |
printf("\trd %.4f\n", cxyz[1]*(1. - fa->farg[3])*(1. - trans)); |
862 |
puts("\tc"); /* put reflected specular */ |
863 |
printf("\trs %.4f %.4f\n", fa->farg[3], rough); |
864 |
return(0); |
865 |
} |
866 |
|
867 |
|
868 |
int |
869 |
o_light( /* convert a light type */ |
870 |
char *mod, |
871 |
char *typ, |
872 |
char *id, |
873 |
register FUNARGS *fa |
874 |
) |
875 |
{ |
876 |
COLOR cxyz, rrgb; |
877 |
double d; |
878 |
|
879 |
if (fa->nfargs < 3) |
880 |
return(-1); |
881 |
newmat(id, NULL); |
882 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
883 |
rgb_cie(cxyz, rrgb); |
884 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
885 |
puts("\tc"); |
886 |
if (d > FTINY) |
887 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
888 |
printf("\ted %.4g\n", cxyz[1]*(PI*WHTEFFICACY)); |
889 |
return(0); |
890 |
} |