1 |
/* Copyright (c) 1994 Regents of the University of California */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ LBL"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* Convert Radiance scene description to MGF |
9 |
*/ |
10 |
|
11 |
#include <stdio.h> |
12 |
#include <string.h> |
13 |
#include "fvect.h" |
14 |
#include "object.h" |
15 |
#include "color.h" |
16 |
#include "lookup.h" |
17 |
|
18 |
int o_face(), o_cone(), o_sphere(), o_ring(), o_cylinder(); |
19 |
int o_instance(), o_source(), o_illum(); |
20 |
int o_plastic(), o_metal(), o_glass(), o_mirror(), o_trans(), o_light(); |
21 |
|
22 |
extern void free(); |
23 |
extern char *malloc(); |
24 |
|
25 |
LUTAB rmats = LU_SINIT(free,NULL); /* defined material table */ |
26 |
|
27 |
LUTAB rdispatch = LU_SINIT(NULL,NULL); /* function dispatch table */ |
28 |
|
29 |
char curmat[80]; /* current material */ |
30 |
|
31 |
double unit_mult = 1.; /* units multiplier */ |
32 |
|
33 |
|
34 |
main(argc, argv) |
35 |
int argc; |
36 |
char **argv; |
37 |
{ |
38 |
int i; |
39 |
|
40 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
41 |
switch (argv[i][1]) { |
42 |
case 'd': /* units */ |
43 |
switch (argv[i][2]) { |
44 |
case 'm': /* meters */ |
45 |
unit_mult = 1.; |
46 |
break; |
47 |
case 'c': /* centimeters */ |
48 |
unit_mult = .01; |
49 |
break; |
50 |
case 'f': /* feet */ |
51 |
unit_mult = 12.*.0254; |
52 |
break; |
53 |
case 'i': /* inches */ |
54 |
unit_mult = .0254; |
55 |
break; |
56 |
default: |
57 |
goto unkopt; |
58 |
} |
59 |
break; |
60 |
} |
61 |
init(); |
62 |
if (i >= argc) |
63 |
rad2mgf(NULL); |
64 |
else |
65 |
for ( ; i < argc; i++) |
66 |
rad2mgf(argv[i]); |
67 |
uninit(); |
68 |
exit(0); |
69 |
unkopt: |
70 |
fprintf(stderr, "Usage: %s [-d{m|c|f|i}] file ..\n", argv[0]); |
71 |
exit(1); |
72 |
} |
73 |
|
74 |
|
75 |
rad2mgf(inp) /* convert a Radiance file to MGF */ |
76 |
char *inp; |
77 |
{ |
78 |
#define mod buf |
79 |
#define typ (buf+128) |
80 |
#define id (buf+256) |
81 |
#define alias (buf+384) |
82 |
char buf[512]; |
83 |
FUNARGS fa; |
84 |
register FILE *fp; |
85 |
register int c; |
86 |
|
87 |
if (inp == NULL) { |
88 |
inp = "the standard input"; |
89 |
fp = stdin; |
90 |
} else if (inp[0] == '!') { |
91 |
if ((fp = popen(inp+1, "r")) == NULL) { |
92 |
fputs(inp, stderr); |
93 |
fputs(": cannot execute\n", stderr); |
94 |
exit(1); |
95 |
} |
96 |
} else if ((fp = fopen(inp, "r")) == NULL) { |
97 |
fputs(inp, stderr); |
98 |
fputs(": cannot open\n", stderr); |
99 |
exit(1); |
100 |
} |
101 |
printf("# Begin conversion from: %s\n", inp); |
102 |
while ((c = getc(fp)) != EOF) |
103 |
switch (c) { |
104 |
case ' ': /* white space */ |
105 |
case '\t': |
106 |
case '\n': |
107 |
case '\r': |
108 |
case '\f': |
109 |
break; |
110 |
case '#': /* comment */ |
111 |
if (fgets(buf, sizeof(buf), fp) != NULL) |
112 |
printf("# %s", buf); |
113 |
break; |
114 |
case '!': /* inline command */ |
115 |
ungetc(c, fp); |
116 |
fgetline(buf, sizeof(buf), fp); |
117 |
rad2mgf(buf); |
118 |
break; |
119 |
default: /* Radiance primitive */ |
120 |
ungetc(c, fp); |
121 |
if (fscanf(fp, "%s %s %s", mod, typ, id) != 3) { |
122 |
fputs(inp, stderr); |
123 |
fputs(": unexpected EOF\n", stderr); |
124 |
exit(1); |
125 |
} |
126 |
if (!strcmp(typ, "alias")) { |
127 |
strcpy(alias, "EOF"); |
128 |
fscanf(fp, "%s", alias); |
129 |
newmat(id, alias); |
130 |
} else { |
131 |
if (!readfargs(&fa, fp)) { |
132 |
fprintf(stderr, |
133 |
"%s: bad argument syntax for %s \"%s\"\n", |
134 |
inp, typ, id); |
135 |
exit(1); |
136 |
} |
137 |
cvtprim(inp, mod, typ, id, &fa); |
138 |
freefargs(&fa); |
139 |
} |
140 |
break; |
141 |
} |
142 |
printf("# End conversion from: %s\n", inp); |
143 |
if (inp[0] == '!') |
144 |
pclose(fp); |
145 |
else |
146 |
fclose(fp); |
147 |
#undef mod |
148 |
#undef typ |
149 |
#undef id |
150 |
#undef alias |
151 |
} |
152 |
|
153 |
|
154 |
cvtprim(inp, mod, typ, id, fa) /* process Radiance primitive */ |
155 |
char *inp, *mod, *typ, *id; |
156 |
FUNARGS *fa; |
157 |
{ |
158 |
int (*df)(); |
159 |
|
160 |
df = (int (*)())lu_find(&rdispatch, typ)->data; |
161 |
if (df != NULL) { /* convert */ |
162 |
if ((*df)(mod, typ, id, fa) < 0) { |
163 |
fprintf(stderr, "%s: bad %s \"%s\"\n", typ, id); |
164 |
exit(1); |
165 |
} |
166 |
} else if (lu_find(&rmats, mod)->data != NULL) /* make alias */ |
167 |
newmat(id, mod); |
168 |
} |
169 |
|
170 |
|
171 |
newmat(id, alias) /* add a modifier to the alias list */ |
172 |
char *id; |
173 |
char *alias; |
174 |
{ |
175 |
register LUENT *lp, *lpa; |
176 |
|
177 |
if (alias != NULL) { /* look up alias */ |
178 |
if ((lpa = lu_find(&rmats, alias)) == NULL) |
179 |
goto memerr; |
180 |
if (lpa->data == NULL) |
181 |
alias = NULL; /* doesn't exist! */ |
182 |
} |
183 |
if ((lp = lu_find(&rmats, id)) == NULL) /* look up material */ |
184 |
goto memerr; |
185 |
if (alias != NULL && lp->data == lpa->key) |
186 |
return; /* alias set already */ |
187 |
if (lp->data == NULL) { /* allocate material */ |
188 |
if ((lp->key = (char *)malloc(strlen(id)+1)) == NULL) |
189 |
goto memerr; |
190 |
strcpy(lp->key, id); |
191 |
} |
192 |
if (alias == NULL) { /* set this material */ |
193 |
lp->data = lp->key; |
194 |
printf("m %s =\n", id); |
195 |
} else { /* set this alias */ |
196 |
lp->data = lpa->key; |
197 |
printf("m %s = %s\n", id, alias); |
198 |
} |
199 |
strcpy(curmat, id); |
200 |
return; |
201 |
memerr: |
202 |
fputs("Out of memory in newmat!\n", stderr); |
203 |
exit(1); |
204 |
} |
205 |
|
206 |
|
207 |
setmat(id) /* set material to this one */ |
208 |
char *id; |
209 |
{ |
210 |
if (!strcmp(id, curmat)) /* already set? */ |
211 |
return; |
212 |
printf("m %s\n", id); |
213 |
strcpy(curmat, id); |
214 |
} |
215 |
|
216 |
|
217 |
init() /* initialize dispatch table and output */ |
218 |
{ |
219 |
lu_init(&rdispatch, 22); |
220 |
add2dispatch("polygon", o_face); |
221 |
add2dispatch("cone", o_cone); |
222 |
add2dispatch("cup", o_cone); |
223 |
add2dispatch("sphere", o_sphere); |
224 |
add2dispatch("bubble", o_sphere); |
225 |
add2dispatch("cylinder", o_cylinder); |
226 |
add2dispatch("tube", o_cylinder); |
227 |
add2dispatch("ring", o_ring); |
228 |
add2dispatch("instance", o_instance); |
229 |
add2dispatch("plastic", o_plastic); |
230 |
add2dispatch("plastic2", o_plastic); |
231 |
add2dispatch("metal", o_metal); |
232 |
add2dispatch("metal2", o_metal); |
233 |
add2dispatch("glass", o_glass); |
234 |
add2dispatch("trans", o_trans); |
235 |
add2dispatch("trans2", o_trans); |
236 |
add2dispatch("mirror", o_mirror); |
237 |
add2dispatch("light", o_light); |
238 |
add2dispatch("spotlight", o_light); |
239 |
add2dispatch("glow", o_light); |
240 |
add2dispatch("illum", o_illum); |
241 |
puts("# The following was converted from Radiance scene input"); |
242 |
if (unit_mult < .999 || unit_mult > 1.001) |
243 |
printf("xf -s %.4e\n", unit_mult); |
244 |
} |
245 |
|
246 |
|
247 |
uninit() /* mark end of MGF file */ |
248 |
{ |
249 |
if (unit_mult < .999 || unit_mult > 1.001) |
250 |
puts("xf"); |
251 |
puts("# End of data converted from Radiance scene input"); |
252 |
lu_done(&rdispatch); |
253 |
lu_done(&rmats); |
254 |
} |
255 |
|
256 |
|
257 |
add2dispatch(name, func) /* add function to dispatch table */ |
258 |
char *name; |
259 |
int (*func)(); |
260 |
{ |
261 |
register LUENT *lp; |
262 |
|
263 |
lp = lu_find(&rdispatch, name); |
264 |
if (lp->key != NULL) { |
265 |
fputs(name, stderr); |
266 |
fputs(": duplicate dispatch entry!\n", stderr); |
267 |
exit(1); |
268 |
} |
269 |
lp->key = name; |
270 |
lp->data = (char *)func; |
271 |
} |
272 |
|
273 |
|
274 |
char VKFMT[] = "%+1.9e %+1.9e %+1.9e"; |
275 |
#define VKLEN 64 |
276 |
|
277 |
#define mkvkey(k,v) sprintf(k, VKFMT, (v)[0], (v)[1], (v)[2]) |
278 |
|
279 |
#define NVERTS 256 |
280 |
|
281 |
long clock; /* incremented at each vertex request */ |
282 |
|
283 |
struct vert { |
284 |
long lused; /* when last used (0 if unassigned) */ |
285 |
FVECT p; /* track point position only */ |
286 |
} vert[NVERTS]; |
287 |
|
288 |
LUTAB vertab = LU_SINIT(free,NULL); /* our vertex lookup table */ |
289 |
|
290 |
|
291 |
char * |
292 |
getvertid(vp) /* get/set vertex ID for this point */ |
293 |
FVECT vp; |
294 |
{ |
295 |
static char vname[6]; |
296 |
char vkey[VKLEN]; |
297 |
register LUENT *lp; |
298 |
register int i, vndx; |
299 |
|
300 |
if (!vertab.tsiz && !lu_init(&vertab, NVERTS)) |
301 |
goto memerr; |
302 |
clock++; /* increment counter */ |
303 |
mkvkey(vkey, vp); |
304 |
if ((lp = lu_find(&vertab, vkey)) == NULL) |
305 |
goto memerr; |
306 |
if (lp->data == NULL) { /* allocate new vertex entry */ |
307 |
if (lp->key != NULL) /* reclaim deleted entry */ |
308 |
vertab.ndel--; |
309 |
else { |
310 |
if ((lp->key = (char *)malloc(VKLEN)) == NULL) |
311 |
goto memerr; |
312 |
strcpy(lp->key, vkey); |
313 |
} |
314 |
vndx = 0; /* find oldest vertex */ |
315 |
for (i = 1; i < NVERTS; i++) |
316 |
if (vert[i].lused < vert[vndx].lused) |
317 |
vndx = i; |
318 |
if (vert[vndx].lused) { /* free old entry first */ |
319 |
mkvkey(vkey, vert[vndx].p); |
320 |
lu_delete(&vertab, vkey); |
321 |
} |
322 |
vert[vndx].lused = clock; /* assign it */ |
323 |
VCOPY(vert[vndx].p, vp); |
324 |
printf("v v%d =\np %.15g %.15g %.15g\n", /* print it */ |
325 |
vndx, vp[0], vp[1], vp[2]); |
326 |
lp->data = (char *)&vert[vndx]; /* set it */ |
327 |
} else |
328 |
vndx = (struct vert *)lp->data - vert; |
329 |
sprintf(vname, "v%d", vndx); |
330 |
return(vname); |
331 |
memerr: |
332 |
fputs("Out of memory in getvertid!\n", stderr); |
333 |
exit(1); |
334 |
} |
335 |
|
336 |
|
337 |
int |
338 |
o_face(mod, typ, id, fa) /* print out a polygon */ |
339 |
char *mod, *typ, *id; |
340 |
FUNARGS *fa; |
341 |
{ |
342 |
char entbuf[512]; |
343 |
register char *cp1, *cp2; |
344 |
register int i; |
345 |
|
346 |
if (fa->nfargs < 9 | fa->nfargs % 3) |
347 |
return(-1); |
348 |
setmat(mod); |
349 |
printf("o %s\n", id); |
350 |
cp1 = entbuf; |
351 |
*cp1++ = 'f'; |
352 |
for (i = 0; i < fa->nfargs; i += 3) { |
353 |
cp2 = getvertid(fa->farg + i); |
354 |
*cp1++ = ' '; |
355 |
while ((*cp1 = *cp2++)) |
356 |
cp1++; |
357 |
} |
358 |
puts(entbuf); |
359 |
puts("o"); |
360 |
return(0); |
361 |
} |
362 |
|
363 |
|
364 |
int |
365 |
o_cone(mod, typ, id, fa) /* print out a cone */ |
366 |
char *mod, *typ, *id; |
367 |
register FUNARGS *fa; |
368 |
{ |
369 |
if (fa->nfargs != 8) |
370 |
return(-1); |
371 |
setmat(mod); |
372 |
printf("o %s\n", id); |
373 |
printf("v cv1 =\np %.12g %.12g %.12g\n", |
374 |
fa->farg[0], fa->farg[1], fa->farg[2]); |
375 |
printf("v cv2 =\np %.12g %.12g %.12g\n", |
376 |
fa->farg[3], fa->farg[4], fa->farg[5]); |
377 |
if (typ[1] == 'u') /* cup -> inverted cone */ |
378 |
printf("cone cv1 %.12g cv2 %.12g\n", |
379 |
-fa->farg[6], -fa->farg[7]); |
380 |
else |
381 |
printf("cone cv1 %.12g cv2 %.12g\n", |
382 |
fa->farg[6], fa->farg[7]); |
383 |
puts("o"); |
384 |
return(0); |
385 |
} |
386 |
|
387 |
|
388 |
int |
389 |
o_sphere(mod, typ, id, fa) /* print out a sphere */ |
390 |
char *mod, *typ, *id; |
391 |
register FUNARGS *fa; |
392 |
{ |
393 |
if (fa->nfargs != 4) |
394 |
return(-1); |
395 |
setmat(mod); |
396 |
printf("o %s\n", id); |
397 |
printf("v cent =\np %.12g %.12g %.12g\n", |
398 |
fa->farg[0], fa->farg[1], fa->farg[2]); |
399 |
printf("sph cent %.12g\n", typ[0]=='b' ? -fa->farg[3] : fa->farg[3]); |
400 |
puts("o"); |
401 |
return(0); |
402 |
} |
403 |
|
404 |
|
405 |
int |
406 |
o_cylinder(mod, typ, id, fa) /* print out a cylinder */ |
407 |
char *mod, *typ, *id; |
408 |
register FUNARGS *fa; |
409 |
{ |
410 |
if (fa->nfargs != 7) |
411 |
return(-1); |
412 |
setmat(mod); |
413 |
printf("o %s\n", id); |
414 |
printf("v cv1 =\np %.12g %.12g %.12g\n", |
415 |
fa->farg[0], fa->farg[1], fa->farg[2]); |
416 |
printf("v cv2 =\np %.12g %.12g %.12g\n", |
417 |
fa->farg[3], fa->farg[4], fa->farg[5]); |
418 |
printf("cyl cv1 %.12g cv2\n", |
419 |
typ[0]=='t' ? -fa->farg[6] : fa->farg[6]); |
420 |
puts("o"); |
421 |
return(0); |
422 |
} |
423 |
|
424 |
|
425 |
int |
426 |
o_ring(mod, typ, id, fa) /* print out a ring */ |
427 |
char *mod, *typ, *id; |
428 |
register FUNARGS *fa; |
429 |
{ |
430 |
if (fa->nfargs != 8) |
431 |
return(-1); |
432 |
setmat(mod); |
433 |
printf("o %s\n", id); |
434 |
printf("v cent =\np %.12g %.12g %.12g\n", |
435 |
fa->farg[0], fa->farg[1], fa->farg[2]); |
436 |
printf("n %.12g %.12g %.12g\n", |
437 |
fa->farg[3], fa->farg[4], fa->farg[5]); |
438 |
if (fa->farg[6] < fa->farg[7]) |
439 |
printf("ring cent %.12g %.12g\n", |
440 |
fa->farg[6], fa->farg[7]); |
441 |
else |
442 |
printf("ring cent %.12g %.12g\n", |
443 |
fa->farg[7], fa->farg[6]); |
444 |
puts("o"); |
445 |
return(0); |
446 |
} |
447 |
|
448 |
|
449 |
int |
450 |
o_instance(mod, typ, id, fa) /* convert an instance */ |
451 |
char *mod, *typ, *id; |
452 |
FUNARGS *fa; |
453 |
{ |
454 |
return(0); /* this is too damned difficult! */ |
455 |
} |
456 |
|
457 |
|
458 |
int |
459 |
o_source(mod, typ, id, fa) /* convert a source */ |
460 |
char *mod, *typ, *id; |
461 |
FUNARGS *fa; |
462 |
{ |
463 |
return(0); /* there is no MGF equivalent! */ |
464 |
} |
465 |
|
466 |
|
467 |
int |
468 |
o_illum(mod, typ, id, fa) /* convert an illum material */ |
469 |
char *mod, *typ, *id; |
470 |
FUNARGS *fa; |
471 |
{ |
472 |
if (fa->nsargs == 1 && strcmp(fa->sarg[0], VOIDID)) { |
473 |
newmat(id, fa->sarg[0]); /* just create alias */ |
474 |
return(0); |
475 |
} |
476 |
/* else create invisible material */ |
477 |
newmat(id, NULL); |
478 |
puts("ts 1 0"); |
479 |
return(0); |
480 |
} |
481 |
|
482 |
|
483 |
int |
484 |
o_plastic(mod, typ, id, fa) /* convert a plastic material */ |
485 |
char *mod, *typ, *id; |
486 |
register FUNARGS *fa; |
487 |
{ |
488 |
COLOR cxyz, rrgb; |
489 |
double d; |
490 |
|
491 |
if (fa->nfargs != (typ[7]=='2' ? 6 : 5)) |
492 |
return(-1); |
493 |
newmat(id, NULL); |
494 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
495 |
rgb_cie(cxyz, rrgb); |
496 |
puts("c"); /* put diffuse component */ |
497 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
498 |
if (d > FTINY) |
499 |
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
500 |
printf("rd %.4f\n", cxyz[1]*(1. - fa->farg[3])); |
501 |
puts("c"); /* put specular component */ |
502 |
printf("rs %.4f %.4f\n", fa->farg[3], |
503 |
typ[7]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
504 |
fa->farg[4]); |
505 |
return(0); |
506 |
} |
507 |
|
508 |
|
509 |
int |
510 |
o_metal(mod, typ, id, fa) /* convert a metal material */ |
511 |
char *mod, *typ, *id; |
512 |
register FUNARGS *fa; |
513 |
{ |
514 |
COLOR cxyz, rrgb; |
515 |
double d; |
516 |
|
517 |
if (fa->nfargs != (typ[5]=='2' ? 6 : 5)) |
518 |
return(-1); |
519 |
newmat(id, NULL); |
520 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
521 |
rgb_cie(cxyz, rrgb); |
522 |
puts("c"); /* put diffuse component */ |
523 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
524 |
if (d > FTINY) |
525 |
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
526 |
printf("rd %.4f\n", cxyz[1]*(1. - fa->farg[3])); |
527 |
/* put specular component */ |
528 |
printf("rs %.4f %.4f\n", cxyz[1]*fa->farg[3], |
529 |
typ[5]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
530 |
fa->farg[4]); |
531 |
return(0); |
532 |
} |
533 |
|
534 |
|
535 |
int |
536 |
o_glass(mod, typ, id, fa) /* convert a glass material */ |
537 |
char *mod, *typ, *id; |
538 |
register FUNARGS *fa; |
539 |
{ |
540 |
COLOR cxyz, rrgb, trgb; |
541 |
double nrfr = 1.52, F, d; |
542 |
register int i; |
543 |
|
544 |
if (fa->nfargs != 3 && fa->nfargs != 4) |
545 |
return(-1); |
546 |
newmat(id, NULL); |
547 |
if (fa->nfargs == 4) |
548 |
nrfr = fa->farg[3]; |
549 |
F = (1. - nrfr)/(1. + nrfr); /* use normal incidence */ |
550 |
F *= F; |
551 |
for (i = 0; i < 3; i++) { |
552 |
rrgb[i] = (1. - F)*(1. - F)/(1. - F*F*fa->farg[i]*fa->farg[i]); |
553 |
trgb[i] = F * (1. + (1. - 2.*F)*fa->farg[i]) / |
554 |
(1. - F*F*fa->farg[i]*fa->farg[i]); |
555 |
} |
556 |
rgb_cie(cxyz, rrgb); /* put reflected component */ |
557 |
puts("c"); |
558 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
559 |
if (d > FTINY) |
560 |
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
561 |
printf("rs %.4f 0\n", cxyz[1]); |
562 |
rgb_cie(cxyz, trgb); /* put transmitted component */ |
563 |
puts("c"); |
564 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
565 |
if (d > FTINY) |
566 |
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
567 |
printf("ts %.4f 0\n", cxyz[1]); |
568 |
return(0); |
569 |
} |
570 |
|
571 |
|
572 |
int |
573 |
o_mirror(mod, typ, id, fa) /* convert a mirror material */ |
574 |
char *mod, *typ, *id; |
575 |
register FUNARGS *fa; |
576 |
{ |
577 |
COLOR cxyz, rrgb; |
578 |
double d; |
579 |
|
580 |
if (fa->nsargs == 1) { /* use alternate material */ |
581 |
newmat(id, fa->sarg[0]); |
582 |
return(0); |
583 |
} |
584 |
if (fa->nfargs != 3) |
585 |
return(-1); |
586 |
newmat(id, NULL); |
587 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
588 |
rgb_cie(cxyz, rrgb); |
589 |
puts("c"); /* put specular component */ |
590 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
591 |
if (d > FTINY) |
592 |
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
593 |
printf("rs %.4f 0\n", cxyz[1]); |
594 |
return(0); |
595 |
} |
596 |
|
597 |
|
598 |
int |
599 |
o_trans(mod, typ, id, fa) /* convert a trans material */ |
600 |
char *mod, *typ, *id; |
601 |
register FUNARGS *fa; |
602 |
{ |
603 |
COLOR cxyz, rrgb; |
604 |
double rough, trans, tspec, d; |
605 |
|
606 |
if (typ[4] == '2') { /* trans2 */ |
607 |
if (fa->nfargs != 8) |
608 |
return(-1); |
609 |
rough = .5*(fa->farg[4] + fa->farg[5]); |
610 |
trans = fa->farg[6]; |
611 |
tspec = fa->farg[7]; |
612 |
} else { /* trans */ |
613 |
if (fa->nfargs != 7) |
614 |
return(-1); |
615 |
rough = fa->farg[4]; |
616 |
trans = fa->farg[5]; |
617 |
tspec = fa->farg[6]; |
618 |
} |
619 |
newmat(id, NULL); |
620 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
621 |
rgb_cie(cxyz, rrgb); |
622 |
puts("c"); /* put transmitted diffuse */ |
623 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
624 |
if (d > FTINY) |
625 |
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
626 |
printf("td %.4f\n", cxyz[1]*trans*(1. - fa->farg[3])*(1. - tspec)); |
627 |
/* put transmitted specular */ |
628 |
printf("ts %.4f %.4f\n", cxyz[1]*trans*tspec*(1. - fa->farg[3]), rough); |
629 |
/* put reflected diffuse */ |
630 |
printf("rd %.4f\n", cxyz[1]*(1. - fa->farg[3])*(1. - trans)); |
631 |
puts("c"); /* put reflected specular */ |
632 |
printf("rs %.4f %.4f\n", fa->farg[3], rough); |
633 |
return(0); |
634 |
} |
635 |
|
636 |
|
637 |
int |
638 |
o_light(mod, typ, id, fa) /* convert a light type */ |
639 |
char *mod, *typ, *id; |
640 |
register FUNARGS *fa; |
641 |
{ |
642 |
COLOR cxyz, rrgb; |
643 |
double d; |
644 |
|
645 |
if (fa->nfargs < 3) |
646 |
return(-1); |
647 |
newmat(id, NULL); |
648 |
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
649 |
rgb_cie(cxyz, rrgb); |
650 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
651 |
puts("c"); |
652 |
if (d > FTINY) |
653 |
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
654 |
printf("ed %.4g\n", cxyz[1]); |
655 |
return(0); |
656 |
} |