1 |
greg |
2.1 |
/* 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 |
greg |
2.10 |
#include <math.h> |
13 |
greg |
2.1 |
#include <string.h> |
14 |
|
|
#include "fvect.h" |
15 |
|
|
#include "object.h" |
16 |
|
|
#include "color.h" |
17 |
|
|
#include "lookup.h" |
18 |
|
|
|
19 |
greg |
2.7 |
#define PI 3.14159265358979323846 |
20 |
|
|
|
21 |
greg |
2.10 |
#define C_1SIDEDTHICK 0.005 |
22 |
|
|
|
23 |
greg |
2.1 |
int o_face(), o_cone(), o_sphere(), o_ring(), o_cylinder(); |
24 |
|
|
int o_instance(), o_source(), o_illum(); |
25 |
greg |
2.10 |
int o_plastic(), o_metal(), o_glass(), o_dielectric(), |
26 |
|
|
o_mirror(), o_trans(), o_light(); |
27 |
greg |
2.1 |
|
28 |
|
|
extern void free(); |
29 |
|
|
extern char *malloc(); |
30 |
|
|
|
31 |
|
|
LUTAB rmats = LU_SINIT(free,NULL); /* defined material table */ |
32 |
|
|
|
33 |
|
|
LUTAB rdispatch = LU_SINIT(NULL,NULL); /* function dispatch table */ |
34 |
|
|
|
35 |
greg |
2.2 |
char curmat[80]; /* current material */ |
36 |
|
|
char curobj[128] = "Untitled"; /* current object name */ |
37 |
greg |
2.1 |
|
38 |
greg |
2.2 |
double unit_mult = 1.; /* units multiplier */ |
39 |
greg |
2.1 |
|
40 |
greg |
2.2 |
#define hasmult (unit_mult < .999 || unit_mult > 1.001) |
41 |
greg |
2.1 |
|
42 |
greg |
2.4 |
/* |
43 |
|
|
* Stuff for tracking and reusing vertices: |
44 |
|
|
*/ |
45 |
greg |
2.2 |
|
46 |
greg |
2.9 |
char VKFMT[] = "%+16.9e %+16.9e %+16.9e"; |
47 |
greg |
2.4 |
#define VKLEN 64 |
48 |
|
|
|
49 |
|
|
#define mkvkey(k,v) sprintf(k, VKFMT, (v)[0], (v)[1], (v)[2]) |
50 |
|
|
|
51 |
|
|
#define NVERTS 256 |
52 |
|
|
|
53 |
greg |
2.8 |
long vclock; /* incremented at each vertex request */ |
54 |
greg |
2.4 |
|
55 |
|
|
struct vert { |
56 |
|
|
long lused; /* when last used (0 if unassigned) */ |
57 |
|
|
FVECT p; /* track point position only */ |
58 |
|
|
} vert[NVERTS]; /* our vertex cache */ |
59 |
|
|
|
60 |
|
|
LUTAB vertab = LU_SINIT(free,NULL); /* our vertex lookup table */ |
61 |
|
|
|
62 |
|
|
|
63 |
greg |
2.1 |
main(argc, argv) |
64 |
|
|
int argc; |
65 |
|
|
char **argv; |
66 |
|
|
{ |
67 |
|
|
int i; |
68 |
|
|
|
69 |
|
|
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
70 |
|
|
switch (argv[i][1]) { |
71 |
|
|
case 'd': /* units */ |
72 |
|
|
switch (argv[i][2]) { |
73 |
|
|
case 'm': /* meters */ |
74 |
|
|
unit_mult = 1.; |
75 |
|
|
break; |
76 |
|
|
case 'c': /* centimeters */ |
77 |
|
|
unit_mult = .01; |
78 |
|
|
break; |
79 |
|
|
case 'f': /* feet */ |
80 |
|
|
unit_mult = 12.*.0254; |
81 |
|
|
break; |
82 |
|
|
case 'i': /* inches */ |
83 |
|
|
unit_mult = .0254; |
84 |
|
|
break; |
85 |
|
|
default: |
86 |
|
|
goto unkopt; |
87 |
|
|
} |
88 |
|
|
break; |
89 |
greg |
2.6 |
default: |
90 |
|
|
goto unkopt; |
91 |
greg |
2.1 |
} |
92 |
|
|
init(); |
93 |
|
|
if (i >= argc) |
94 |
|
|
rad2mgf(NULL); |
95 |
|
|
else |
96 |
|
|
for ( ; i < argc; i++) |
97 |
|
|
rad2mgf(argv[i]); |
98 |
|
|
uninit(); |
99 |
|
|
exit(0); |
100 |
|
|
unkopt: |
101 |
|
|
fprintf(stderr, "Usage: %s [-d{m|c|f|i}] file ..\n", argv[0]); |
102 |
|
|
exit(1); |
103 |
|
|
} |
104 |
|
|
|
105 |
|
|
|
106 |
|
|
rad2mgf(inp) /* convert a Radiance file to MGF */ |
107 |
|
|
char *inp; |
108 |
|
|
{ |
109 |
|
|
#define mod buf |
110 |
|
|
#define typ (buf+128) |
111 |
|
|
#define id (buf+256) |
112 |
|
|
#define alias (buf+384) |
113 |
|
|
char buf[512]; |
114 |
|
|
FUNARGS fa; |
115 |
|
|
register FILE *fp; |
116 |
|
|
register int c; |
117 |
|
|
|
118 |
|
|
if (inp == NULL) { |
119 |
greg |
2.2 |
inp = "standard input"; |
120 |
greg |
2.1 |
fp = stdin; |
121 |
|
|
} else if (inp[0] == '!') { |
122 |
|
|
if ((fp = popen(inp+1, "r")) == NULL) { |
123 |
|
|
fputs(inp, stderr); |
124 |
|
|
fputs(": cannot execute\n", stderr); |
125 |
|
|
exit(1); |
126 |
|
|
} |
127 |
|
|
} else if ((fp = fopen(inp, "r")) == NULL) { |
128 |
|
|
fputs(inp, stderr); |
129 |
|
|
fputs(": cannot open\n", stderr); |
130 |
|
|
exit(1); |
131 |
|
|
} |
132 |
|
|
printf("# Begin conversion from: %s\n", inp); |
133 |
|
|
while ((c = getc(fp)) != EOF) |
134 |
|
|
switch (c) { |
135 |
|
|
case ' ': /* white space */ |
136 |
|
|
case '\t': |
137 |
|
|
case '\n': |
138 |
|
|
case '\r': |
139 |
|
|
case '\f': |
140 |
|
|
break; |
141 |
|
|
case '#': /* comment */ |
142 |
|
|
if (fgets(buf, sizeof(buf), fp) != NULL) |
143 |
|
|
printf("# %s", buf); |
144 |
|
|
break; |
145 |
|
|
case '!': /* inline command */ |
146 |
|
|
ungetc(c, fp); |
147 |
|
|
fgetline(buf, sizeof(buf), fp); |
148 |
|
|
rad2mgf(buf); |
149 |
|
|
break; |
150 |
|
|
default: /* Radiance primitive */ |
151 |
|
|
ungetc(c, fp); |
152 |
|
|
if (fscanf(fp, "%s %s %s", mod, typ, id) != 3) { |
153 |
|
|
fputs(inp, stderr); |
154 |
|
|
fputs(": unexpected EOF\n", stderr); |
155 |
|
|
exit(1); |
156 |
|
|
} |
157 |
|
|
if (!strcmp(typ, "alias")) { |
158 |
|
|
strcpy(alias, "EOF"); |
159 |
|
|
fscanf(fp, "%s", alias); |
160 |
|
|
newmat(id, alias); |
161 |
|
|
} else { |
162 |
|
|
if (!readfargs(&fa, fp)) { |
163 |
|
|
fprintf(stderr, |
164 |
|
|
"%s: bad argument syntax for %s \"%s\"\n", |
165 |
|
|
inp, typ, id); |
166 |
|
|
exit(1); |
167 |
|
|
} |
168 |
|
|
cvtprim(inp, mod, typ, id, &fa); |
169 |
|
|
freefargs(&fa); |
170 |
|
|
} |
171 |
|
|
break; |
172 |
|
|
} |
173 |
|
|
printf("# End conversion from: %s\n", inp); |
174 |
|
|
if (inp[0] == '!') |
175 |
|
|
pclose(fp); |
176 |
|
|
else |
177 |
|
|
fclose(fp); |
178 |
|
|
#undef mod |
179 |
|
|
#undef typ |
180 |
|
|
#undef id |
181 |
|
|
#undef alias |
182 |
|
|
} |
183 |
|
|
|
184 |
|
|
|
185 |
|
|
cvtprim(inp, mod, typ, id, fa) /* process Radiance primitive */ |
186 |
|
|
char *inp, *mod, *typ, *id; |
187 |
|
|
FUNARGS *fa; |
188 |
|
|
{ |
189 |
|
|
int (*df)(); |
190 |
|
|
|
191 |
|
|
df = (int (*)())lu_find(&rdispatch, typ)->data; |
192 |
|
|
if (df != NULL) { /* convert */ |
193 |
|
|
if ((*df)(mod, typ, id, fa) < 0) { |
194 |
|
|
fprintf(stderr, "%s: bad %s \"%s\"\n", typ, id); |
195 |
|
|
exit(1); |
196 |
|
|
} |
197 |
|
|
} else if (lu_find(&rmats, mod)->data != NULL) /* make alias */ |
198 |
|
|
newmat(id, mod); |
199 |
|
|
} |
200 |
|
|
|
201 |
|
|
|
202 |
|
|
newmat(id, alias) /* add a modifier to the alias list */ |
203 |
|
|
char *id; |
204 |
|
|
char *alias; |
205 |
|
|
{ |
206 |
|
|
register LUENT *lp, *lpa; |
207 |
|
|
|
208 |
|
|
if (alias != NULL) { /* look up alias */ |
209 |
|
|
if ((lpa = lu_find(&rmats, alias)) == NULL) |
210 |
|
|
goto memerr; |
211 |
|
|
if (lpa->data == NULL) |
212 |
|
|
alias = NULL; /* doesn't exist! */ |
213 |
|
|
} |
214 |
|
|
if ((lp = lu_find(&rmats, id)) == NULL) /* look up material */ |
215 |
|
|
goto memerr; |
216 |
|
|
if (alias != NULL && lp->data == lpa->key) |
217 |
|
|
return; /* alias set already */ |
218 |
|
|
if (lp->data == NULL) { /* allocate material */ |
219 |
|
|
if ((lp->key = (char *)malloc(strlen(id)+1)) == NULL) |
220 |
|
|
goto memerr; |
221 |
|
|
strcpy(lp->key, id); |
222 |
|
|
} |
223 |
|
|
if (alias == NULL) { /* set this material */ |
224 |
|
|
lp->data = lp->key; |
225 |
|
|
printf("m %s =\n", id); |
226 |
|
|
} else { /* set this alias */ |
227 |
|
|
lp->data = lpa->key; |
228 |
|
|
printf("m %s = %s\n", id, alias); |
229 |
|
|
} |
230 |
|
|
strcpy(curmat, id); |
231 |
|
|
return; |
232 |
|
|
memerr: |
233 |
|
|
fputs("Out of memory in newmat!\n", stderr); |
234 |
|
|
exit(1); |
235 |
|
|
} |
236 |
|
|
|
237 |
|
|
|
238 |
|
|
setmat(id) /* set material to this one */ |
239 |
|
|
char *id; |
240 |
|
|
{ |
241 |
|
|
if (!strcmp(id, curmat)) /* already set? */ |
242 |
|
|
return; |
243 |
greg |
2.2 |
if (!strcmp(id, VOIDID)) /* cannot set */ |
244 |
|
|
return; |
245 |
greg |
2.1 |
printf("m %s\n", id); |
246 |
|
|
strcpy(curmat, id); |
247 |
|
|
} |
248 |
|
|
|
249 |
|
|
|
250 |
greg |
2.2 |
setobj(id) /* set object name to this one */ |
251 |
|
|
char *id; |
252 |
|
|
{ |
253 |
|
|
register char *cp, *cp2; |
254 |
|
|
char *end = NULL; |
255 |
|
|
int diff = 0; |
256 |
|
|
/* use all but final suffix */ |
257 |
|
|
for (cp = id; *cp; cp++) |
258 |
|
|
if (*cp == '.') |
259 |
|
|
end = cp; |
260 |
|
|
if (end == NULL) |
261 |
|
|
end = cp; |
262 |
|
|
/* copy to current object */ |
263 |
|
|
for (cp = id, cp2 = curobj; cp < end; *cp2++ = *cp++) |
264 |
|
|
diff += *cp != *cp2; |
265 |
|
|
if (!diff && !*cp2) |
266 |
|
|
return; |
267 |
|
|
*cp2 = '\0'; |
268 |
|
|
fputs("o\no ", stdout); |
269 |
|
|
puts(curobj); |
270 |
|
|
} |
271 |
|
|
|
272 |
|
|
|
273 |
greg |
2.1 |
init() /* initialize dispatch table and output */ |
274 |
|
|
{ |
275 |
greg |
2.4 |
lu_init(&vertab, NVERTS); |
276 |
greg |
2.1 |
lu_init(&rdispatch, 22); |
277 |
|
|
add2dispatch("polygon", o_face); |
278 |
|
|
add2dispatch("cone", o_cone); |
279 |
|
|
add2dispatch("cup", o_cone); |
280 |
|
|
add2dispatch("sphere", o_sphere); |
281 |
|
|
add2dispatch("bubble", o_sphere); |
282 |
|
|
add2dispatch("cylinder", o_cylinder); |
283 |
|
|
add2dispatch("tube", o_cylinder); |
284 |
|
|
add2dispatch("ring", o_ring); |
285 |
|
|
add2dispatch("instance", o_instance); |
286 |
|
|
add2dispatch("plastic", o_plastic); |
287 |
|
|
add2dispatch("plastic2", o_plastic); |
288 |
|
|
add2dispatch("metal", o_metal); |
289 |
|
|
add2dispatch("metal2", o_metal); |
290 |
|
|
add2dispatch("glass", o_glass); |
291 |
greg |
2.10 |
add2dispatch("dielectric", o_dielectric); |
292 |
greg |
2.1 |
add2dispatch("trans", o_trans); |
293 |
|
|
add2dispatch("trans2", o_trans); |
294 |
|
|
add2dispatch("mirror", o_mirror); |
295 |
|
|
add2dispatch("light", o_light); |
296 |
|
|
add2dispatch("spotlight", o_light); |
297 |
|
|
add2dispatch("glow", o_light); |
298 |
|
|
add2dispatch("illum", o_illum); |
299 |
|
|
puts("# The following was converted from Radiance scene input"); |
300 |
greg |
2.2 |
if (hasmult) |
301 |
greg |
2.1 |
printf("xf -s %.4e\n", unit_mult); |
302 |
greg |
2.2 |
printf("o %s\n", curobj); |
303 |
greg |
2.1 |
} |
304 |
|
|
|
305 |
|
|
|
306 |
|
|
uninit() /* mark end of MGF file */ |
307 |
|
|
{ |
308 |
greg |
2.2 |
puts("o"); |
309 |
|
|
if (hasmult) |
310 |
greg |
2.1 |
puts("xf"); |
311 |
|
|
puts("# End of data converted from Radiance scene input"); |
312 |
|
|
lu_done(&rdispatch); |
313 |
|
|
lu_done(&rmats); |
314 |
greg |
2.4 |
lu_done(&vertab); |
315 |
greg |
2.1 |
} |
316 |
|
|
|
317 |
|
|
|
318 |
greg |
2.5 |
clrverts() /* clear vertex table */ |
319 |
|
|
{ |
320 |
|
|
register int i; |
321 |
|
|
|
322 |
|
|
lu_done(&vertab); |
323 |
|
|
for (i = 0; i < NVERTS; i++) |
324 |
|
|
vert[i].lused = 0; |
325 |
|
|
lu_init(&vertab, NVERTS); |
326 |
|
|
} |
327 |
|
|
|
328 |
|
|
|
329 |
greg |
2.1 |
add2dispatch(name, func) /* add function to dispatch table */ |
330 |
|
|
char *name; |
331 |
|
|
int (*func)(); |
332 |
|
|
{ |
333 |
|
|
register LUENT *lp; |
334 |
|
|
|
335 |
|
|
lp = lu_find(&rdispatch, name); |
336 |
|
|
if (lp->key != NULL) { |
337 |
|
|
fputs(name, stderr); |
338 |
|
|
fputs(": duplicate dispatch entry!\n", stderr); |
339 |
|
|
exit(1); |
340 |
|
|
} |
341 |
|
|
lp->key = name; |
342 |
|
|
lp->data = (char *)func; |
343 |
|
|
} |
344 |
|
|
|
345 |
|
|
|
346 |
|
|
char * |
347 |
greg |
2.2 |
getvertid(vname, vp) /* get/set vertex ID for this point */ |
348 |
|
|
char *vname; |
349 |
greg |
2.1 |
FVECT vp; |
350 |
|
|
{ |
351 |
greg |
2.9 |
static char vkey[VKLEN]; |
352 |
greg |
2.1 |
register LUENT *lp; |
353 |
|
|
register int i, vndx; |
354 |
|
|
|
355 |
greg |
2.8 |
vclock++; /* increment counter */ |
356 |
greg |
2.1 |
mkvkey(vkey, vp); |
357 |
|
|
if ((lp = lu_find(&vertab, vkey)) == NULL) |
358 |
|
|
goto memerr; |
359 |
|
|
if (lp->data == NULL) { /* allocate new vertex entry */ |
360 |
|
|
if (lp->key != NULL) /* reclaim deleted entry */ |
361 |
|
|
vertab.ndel--; |
362 |
|
|
else { |
363 |
|
|
if ((lp->key = (char *)malloc(VKLEN)) == NULL) |
364 |
|
|
goto memerr; |
365 |
|
|
strcpy(lp->key, vkey); |
366 |
|
|
} |
367 |
|
|
vndx = 0; /* find oldest vertex */ |
368 |
|
|
for (i = 1; i < NVERTS; i++) |
369 |
|
|
if (vert[i].lused < vert[vndx].lused) |
370 |
|
|
vndx = i; |
371 |
|
|
if (vert[vndx].lused) { /* free old entry first */ |
372 |
|
|
mkvkey(vkey, vert[vndx].p); |
373 |
|
|
lu_delete(&vertab, vkey); |
374 |
|
|
} |
375 |
greg |
2.3 |
VCOPY(vert[vndx].p, vp); /* assign it */ |
376 |
greg |
2.2 |
printf("v v%d =\n\tp %.15g %.15g %.15g\n", /* print it */ |
377 |
greg |
2.1 |
vndx, vp[0], vp[1], vp[2]); |
378 |
|
|
lp->data = (char *)&vert[vndx]; /* set it */ |
379 |
|
|
} else |
380 |
|
|
vndx = (struct vert *)lp->data - vert; |
381 |
greg |
2.8 |
vert[vndx].lused = vclock; /* record this use */ |
382 |
greg |
2.1 |
sprintf(vname, "v%d", vndx); |
383 |
|
|
return(vname); |
384 |
|
|
memerr: |
385 |
|
|
fputs("Out of memory in getvertid!\n", stderr); |
386 |
|
|
exit(1); |
387 |
|
|
} |
388 |
|
|
|
389 |
|
|
|
390 |
|
|
int |
391 |
|
|
o_face(mod, typ, id, fa) /* print out a polygon */ |
392 |
|
|
char *mod, *typ, *id; |
393 |
|
|
FUNARGS *fa; |
394 |
|
|
{ |
395 |
|
|
char entbuf[512]; |
396 |
greg |
2.2 |
register char *cp; |
397 |
greg |
2.1 |
register int i; |
398 |
|
|
|
399 |
|
|
if (fa->nfargs < 9 | fa->nfargs % 3) |
400 |
|
|
return(-1); |
401 |
|
|
setmat(mod); |
402 |
greg |
2.2 |
setobj(id); |
403 |
|
|
cp = entbuf; |
404 |
|
|
*cp++ = 'f'; |
405 |
greg |
2.1 |
for (i = 0; i < fa->nfargs; i += 3) { |
406 |
greg |
2.2 |
*cp++ = ' '; |
407 |
|
|
getvertid(cp, fa->farg + i); |
408 |
|
|
while (*cp) |
409 |
|
|
cp++; |
410 |
greg |
2.1 |
} |
411 |
|
|
puts(entbuf); |
412 |
|
|
return(0); |
413 |
|
|
} |
414 |
|
|
|
415 |
|
|
|
416 |
|
|
int |
417 |
|
|
o_cone(mod, typ, id, fa) /* print out a cone */ |
418 |
|
|
char *mod, *typ, *id; |
419 |
|
|
register FUNARGS *fa; |
420 |
|
|
{ |
421 |
greg |
2.2 |
char v1[6], v2[6]; |
422 |
|
|
|
423 |
greg |
2.1 |
if (fa->nfargs != 8) |
424 |
|
|
return(-1); |
425 |
|
|
setmat(mod); |
426 |
greg |
2.2 |
setobj(id); |
427 |
|
|
getvertid(v1, fa->farg); |
428 |
|
|
getvertid(v2, fa->farg + 3); |
429 |
greg |
2.1 |
if (typ[1] == 'u') /* cup -> inverted cone */ |
430 |
greg |
2.2 |
printf("cone %s %.12g %s %.12g\n", |
431 |
|
|
v1, -fa->farg[6], v2, -fa->farg[7]); |
432 |
greg |
2.1 |
else |
433 |
greg |
2.2 |
printf("cone %s %.12g %s %.12g\n", |
434 |
|
|
v1, fa->farg[6], v2, fa->farg[7]); |
435 |
greg |
2.1 |
return(0); |
436 |
|
|
} |
437 |
|
|
|
438 |
|
|
|
439 |
|
|
int |
440 |
|
|
o_sphere(mod, typ, id, fa) /* print out a sphere */ |
441 |
|
|
char *mod, *typ, *id; |
442 |
|
|
register FUNARGS *fa; |
443 |
|
|
{ |
444 |
greg |
2.2 |
char cent[6]; |
445 |
|
|
|
446 |
greg |
2.1 |
if (fa->nfargs != 4) |
447 |
|
|
return(-1); |
448 |
|
|
setmat(mod); |
449 |
greg |
2.2 |
setobj(id); |
450 |
|
|
printf("sph %s %.12g\n", getvertid(cent, fa->farg), |
451 |
|
|
typ[0]=='b' ? -fa->farg[3] : fa->farg[3]); |
452 |
greg |
2.1 |
return(0); |
453 |
|
|
} |
454 |
|
|
|
455 |
|
|
|
456 |
|
|
int |
457 |
|
|
o_cylinder(mod, typ, id, fa) /* print out a cylinder */ |
458 |
|
|
char *mod, *typ, *id; |
459 |
|
|
register FUNARGS *fa; |
460 |
|
|
{ |
461 |
greg |
2.2 |
char v1[6], v2[6]; |
462 |
|
|
|
463 |
greg |
2.1 |
if (fa->nfargs != 7) |
464 |
|
|
return(-1); |
465 |
|
|
setmat(mod); |
466 |
greg |
2.2 |
setobj(id); |
467 |
|
|
getvertid(v1, fa->farg); |
468 |
|
|
getvertid(v2, fa->farg + 3); |
469 |
|
|
printf("cyl %s %.12g %s\n", v1, |
470 |
|
|
typ[0]=='t' ? -fa->farg[6] : fa->farg[6], v2); |
471 |
greg |
2.1 |
return(0); |
472 |
|
|
} |
473 |
|
|
|
474 |
|
|
|
475 |
|
|
int |
476 |
|
|
o_ring(mod, typ, id, fa) /* print out a ring */ |
477 |
|
|
char *mod, *typ, *id; |
478 |
|
|
register FUNARGS *fa; |
479 |
|
|
{ |
480 |
|
|
if (fa->nfargs != 8) |
481 |
|
|
return(-1); |
482 |
|
|
setmat(mod); |
483 |
greg |
2.2 |
setobj(id); |
484 |
|
|
printf("v cent =\n\tp %.12g %.12g %.12g\n", |
485 |
greg |
2.1 |
fa->farg[0], fa->farg[1], fa->farg[2]); |
486 |
greg |
2.2 |
printf("\tn %.12g %.12g %.12g\n", |
487 |
greg |
2.1 |
fa->farg[3], fa->farg[4], fa->farg[5]); |
488 |
|
|
if (fa->farg[6] < fa->farg[7]) |
489 |
|
|
printf("ring cent %.12g %.12g\n", |
490 |
|
|
fa->farg[6], fa->farg[7]); |
491 |
|
|
else |
492 |
|
|
printf("ring cent %.12g %.12g\n", |
493 |
|
|
fa->farg[7], fa->farg[6]); |
494 |
|
|
return(0); |
495 |
|
|
} |
496 |
|
|
|
497 |
|
|
|
498 |
|
|
int |
499 |
|
|
o_instance(mod, typ, id, fa) /* convert an instance */ |
500 |
|
|
char *mod, *typ, *id; |
501 |
|
|
FUNARGS *fa; |
502 |
|
|
{ |
503 |
greg |
2.2 |
register int i; |
504 |
|
|
register char *cp; |
505 |
|
|
char *start = NULL, *end = NULL; |
506 |
|
|
/* |
507 |
|
|
* We don't really know how to do this, so we just create |
508 |
|
|
* a reference to an undefined MGF file and it's the user's |
509 |
|
|
* responsibility to create this file and put the appropriate |
510 |
|
|
* stuff into it. |
511 |
|
|
*/ |
512 |
|
|
if (fa->nsargs < 1) |
513 |
|
|
return(-1); |
514 |
|
|
setmat(mod); /* only works if surfaces are void */ |
515 |
|
|
setobj(id); |
516 |
|
|
for (cp = fa->sarg[0]; *cp; cp++) /* construct MGF file name */ |
517 |
|
|
if (*cp == '/') |
518 |
|
|
start = cp+1; |
519 |
|
|
else if (*cp == '.') |
520 |
|
|
end = cp; |
521 |
|
|
if (start == NULL) |
522 |
|
|
start = fa->sarg[0]; |
523 |
|
|
if (end == NULL || start >= end) |
524 |
|
|
end = cp; |
525 |
|
|
fputs("i ", stdout); /* print include entity */ |
526 |
|
|
for (cp = start; cp < end; cp++) |
527 |
|
|
putchar(*cp); |
528 |
|
|
fputs(".mgf", stdout); /* add MGF suffix */ |
529 |
|
|
for (i = 1; i < fa->nsargs; i++) { /* add transform */ |
530 |
|
|
putchar(' '); |
531 |
|
|
fputs(fa->sarg[i], stdout); |
532 |
|
|
} |
533 |
|
|
putchar('\n'); |
534 |
greg |
2.5 |
clrverts(); /* vertex id's no longer reliable */ |
535 |
greg |
2.2 |
return(0); |
536 |
greg |
2.1 |
} |
537 |
|
|
|
538 |
|
|
|
539 |
|
|
int |
540 |
|
|
o_source(mod, typ, id, fa) /* convert a source */ |
541 |
|
|
char *mod, *typ, *id; |
542 |
|
|
FUNARGS *fa; |
543 |
|
|
{ |
544 |
|
|
return(0); /* there is no MGF equivalent! */ |
545 |
|
|
} |
546 |
|
|
|
547 |
|
|
|
548 |
|
|
int |
549 |
|
|
o_illum(mod, typ, id, fa) /* convert an illum material */ |
550 |
|
|
char *mod, *typ, *id; |
551 |
|
|
FUNARGS *fa; |
552 |
|
|
{ |
553 |
|
|
if (fa->nsargs == 1 && strcmp(fa->sarg[0], VOIDID)) { |
554 |
|
|
newmat(id, fa->sarg[0]); /* just create alias */ |
555 |
|
|
return(0); |
556 |
|
|
} |
557 |
|
|
/* else create invisible material */ |
558 |
|
|
newmat(id, NULL); |
559 |
greg |
2.2 |
puts("\tts 1 0"); |
560 |
greg |
2.1 |
return(0); |
561 |
|
|
} |
562 |
|
|
|
563 |
|
|
|
564 |
|
|
int |
565 |
|
|
o_plastic(mod, typ, id, fa) /* convert a plastic material */ |
566 |
|
|
char *mod, *typ, *id; |
567 |
|
|
register FUNARGS *fa; |
568 |
|
|
{ |
569 |
|
|
COLOR cxyz, rrgb; |
570 |
|
|
double d; |
571 |
|
|
|
572 |
|
|
if (fa->nfargs != (typ[7]=='2' ? 6 : 5)) |
573 |
|
|
return(-1); |
574 |
|
|
newmat(id, NULL); |
575 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
576 |
|
|
rgb_cie(cxyz, rrgb); |
577 |
greg |
2.2 |
puts("\tc"); /* put diffuse component */ |
578 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
579 |
|
|
if (d > FTINY) |
580 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
581 |
|
|
printf("\trd %.4f\n", cxyz[1]*(1. - fa->farg[3])); |
582 |
|
|
if (fa->farg[3] > FTINY) { /* put specular component */ |
583 |
|
|
puts("\tc"); |
584 |
|
|
printf("\trs %.4f %.4f\n", fa->farg[3], |
585 |
|
|
typ[7]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
586 |
|
|
fa->farg[4]); |
587 |
|
|
} |
588 |
greg |
2.1 |
return(0); |
589 |
|
|
} |
590 |
|
|
|
591 |
|
|
|
592 |
|
|
int |
593 |
|
|
o_metal(mod, typ, id, fa) /* convert a metal material */ |
594 |
|
|
char *mod, *typ, *id; |
595 |
|
|
register FUNARGS *fa; |
596 |
|
|
{ |
597 |
|
|
COLOR cxyz, rrgb; |
598 |
|
|
double d; |
599 |
|
|
|
600 |
|
|
if (fa->nfargs != (typ[5]=='2' ? 6 : 5)) |
601 |
|
|
return(-1); |
602 |
|
|
newmat(id, NULL); |
603 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
604 |
|
|
rgb_cie(cxyz, rrgb); |
605 |
greg |
2.2 |
puts("\tc"); /* put diffuse component */ |
606 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
607 |
|
|
if (d > FTINY) |
608 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
609 |
|
|
printf("\trd %.4f\n", cxyz[1]*(1. - fa->farg[3])); |
610 |
greg |
2.1 |
/* put specular component */ |
611 |
greg |
2.2 |
printf("\trs %.4f %.4f\n", cxyz[1]*fa->farg[3], |
612 |
greg |
2.1 |
typ[5]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
613 |
|
|
fa->farg[4]); |
614 |
|
|
return(0); |
615 |
|
|
} |
616 |
|
|
|
617 |
|
|
|
618 |
|
|
int |
619 |
|
|
o_glass(mod, typ, id, fa) /* convert a glass material */ |
620 |
|
|
char *mod, *typ, *id; |
621 |
|
|
register FUNARGS *fa; |
622 |
|
|
{ |
623 |
|
|
COLOR cxyz, rrgb, trgb; |
624 |
|
|
double nrfr = 1.52, F, d; |
625 |
|
|
register int i; |
626 |
|
|
|
627 |
|
|
if (fa->nfargs != 3 && fa->nfargs != 4) |
628 |
|
|
return(-1); |
629 |
|
|
newmat(id, NULL); |
630 |
|
|
if (fa->nfargs == 4) |
631 |
|
|
nrfr = fa->farg[3]; |
632 |
greg |
2.10 |
printf("\tir %f 0\n", nrfr); |
633 |
greg |
2.1 |
F = (1. - nrfr)/(1. + nrfr); /* use normal incidence */ |
634 |
|
|
F *= F; |
635 |
|
|
for (i = 0; i < 3; i++) { |
636 |
greg |
2.2 |
trgb[i] = fa->farg[i] * (1. - F)*(1. - F) / |
637 |
greg |
2.1 |
(1. - F*F*fa->farg[i]*fa->farg[i]); |
638 |
greg |
2.2 |
rrgb[i] = F * (1. + (1. - 2.*F)*fa->farg[i]) / |
639 |
|
|
(1. - F*F*fa->farg[i]*fa->farg[i]); |
640 |
greg |
2.1 |
} |
641 |
|
|
rgb_cie(cxyz, rrgb); /* put reflected component */ |
642 |
greg |
2.2 |
puts("\tc"); |
643 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
644 |
|
|
if (d > FTINY) |
645 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
646 |
|
|
printf("\trs %.4f 0\n", cxyz[1]); |
647 |
greg |
2.10 |
rgb_cie(cxyz, trgb); /* put transmitted component */ |
648 |
|
|
puts("\tc"); |
649 |
|
|
d = cxyz[0] + cxyz[1] + cxyz[2]; |
650 |
|
|
if (d > FTINY) |
651 |
|
|
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
652 |
|
|
printf("\tts %.4f 0\n", cxyz[1]); |
653 |
|
|
return(0); |
654 |
|
|
} |
655 |
|
|
|
656 |
|
|
|
657 |
|
|
int |
658 |
|
|
o_dielectric(mod, typ, id, fa) /* convert a dielectric material */ |
659 |
|
|
char *mod, *typ, *id; |
660 |
|
|
register FUNARGS *fa; |
661 |
|
|
{ |
662 |
|
|
COLOR cxyz, trgb; |
663 |
|
|
double F, d; |
664 |
|
|
register int i; |
665 |
|
|
|
666 |
|
|
if (fa->nfargs != 5) |
667 |
|
|
return(-1); |
668 |
|
|
newmat(id, NULL); |
669 |
|
|
F = (1. - fa->farg[3])/(1. + fa->farg[3]); /* normal incidence */ |
670 |
|
|
F *= F; |
671 |
|
|
for (i = 0; i < 3; i++) |
672 |
|
|
trgb[i] = (1. - F)*pow(fa->farg[i], C_1SIDEDTHICK/unit_mult); |
673 |
|
|
printf("\tir %f 0\n", fa->farg[3]); /* put index of refraction */ |
674 |
|
|
printf("\tsides 1\n"); |
675 |
|
|
puts("\tc"); /* put reflected component */ |
676 |
|
|
printf("\trs %.4f 0\n", F); |
677 |
greg |
2.1 |
rgb_cie(cxyz, trgb); /* put transmitted component */ |
678 |
greg |
2.2 |
puts("\tc"); |
679 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
680 |
|
|
if (d > FTINY) |
681 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
682 |
|
|
printf("\tts %.4f 0\n", cxyz[1]); |
683 |
greg |
2.1 |
return(0); |
684 |
|
|
} |
685 |
|
|
|
686 |
|
|
|
687 |
|
|
int |
688 |
|
|
o_mirror(mod, typ, id, fa) /* convert a mirror material */ |
689 |
|
|
char *mod, *typ, *id; |
690 |
|
|
register FUNARGS *fa; |
691 |
|
|
{ |
692 |
|
|
COLOR cxyz, rrgb; |
693 |
|
|
double d; |
694 |
|
|
|
695 |
|
|
if (fa->nsargs == 1) { /* use alternate material */ |
696 |
|
|
newmat(id, fa->sarg[0]); |
697 |
|
|
return(0); |
698 |
|
|
} |
699 |
|
|
if (fa->nfargs != 3) |
700 |
|
|
return(-1); |
701 |
|
|
newmat(id, NULL); |
702 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
703 |
|
|
rgb_cie(cxyz, rrgb); |
704 |
greg |
2.2 |
puts("\tc"); /* put specular component */ |
705 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
706 |
|
|
if (d > FTINY) |
707 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
708 |
|
|
printf("\trs %.4f 0\n", cxyz[1]); |
709 |
greg |
2.1 |
return(0); |
710 |
|
|
} |
711 |
|
|
|
712 |
|
|
|
713 |
|
|
int |
714 |
|
|
o_trans(mod, typ, id, fa) /* convert a trans material */ |
715 |
|
|
char *mod, *typ, *id; |
716 |
|
|
register FUNARGS *fa; |
717 |
|
|
{ |
718 |
|
|
COLOR cxyz, rrgb; |
719 |
|
|
double rough, trans, tspec, d; |
720 |
|
|
|
721 |
|
|
if (typ[4] == '2') { /* trans2 */ |
722 |
|
|
if (fa->nfargs != 8) |
723 |
|
|
return(-1); |
724 |
|
|
rough = .5*(fa->farg[4] + fa->farg[5]); |
725 |
|
|
trans = fa->farg[6]; |
726 |
|
|
tspec = fa->farg[7]; |
727 |
|
|
} else { /* trans */ |
728 |
|
|
if (fa->nfargs != 7) |
729 |
|
|
return(-1); |
730 |
|
|
rough = fa->farg[4]; |
731 |
|
|
trans = fa->farg[5]; |
732 |
|
|
tspec = fa->farg[6]; |
733 |
|
|
} |
734 |
|
|
newmat(id, NULL); |
735 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
736 |
|
|
rgb_cie(cxyz, rrgb); |
737 |
greg |
2.2 |
puts("\tc"); /* put transmitted diffuse */ |
738 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
739 |
|
|
if (d > FTINY) |
740 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
741 |
|
|
printf("\ttd %.4f\n", cxyz[1]*trans*(1. - fa->farg[3])*(1. - tspec)); |
742 |
greg |
2.1 |
/* put transmitted specular */ |
743 |
greg |
2.2 |
printf("\tts %.4f %.4f\n", cxyz[1]*trans*tspec*(1. - fa->farg[3]), rough); |
744 |
greg |
2.1 |
/* put reflected diffuse */ |
745 |
greg |
2.2 |
printf("\trd %.4f\n", cxyz[1]*(1. - fa->farg[3])*(1. - trans)); |
746 |
|
|
puts("\tc"); /* put reflected specular */ |
747 |
|
|
printf("\trs %.4f %.4f\n", fa->farg[3], rough); |
748 |
greg |
2.1 |
return(0); |
749 |
|
|
} |
750 |
|
|
|
751 |
|
|
|
752 |
|
|
int |
753 |
|
|
o_light(mod, typ, id, fa) /* convert a light type */ |
754 |
|
|
char *mod, *typ, *id; |
755 |
|
|
register FUNARGS *fa; |
756 |
|
|
{ |
757 |
|
|
COLOR cxyz, rrgb; |
758 |
|
|
double d; |
759 |
|
|
|
760 |
|
|
if (fa->nfargs < 3) |
761 |
|
|
return(-1); |
762 |
|
|
newmat(id, NULL); |
763 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
764 |
|
|
rgb_cie(cxyz, rrgb); |
765 |
|
|
d = cxyz[0] + cxyz[1] + cxyz[2]; |
766 |
greg |
2.2 |
puts("\tc"); |
767 |
greg |
2.1 |
if (d > FTINY) |
768 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
769 |
greg |
2.7 |
printf("\ted %.4g\n", cxyz[1]*(PI*WHTEFFICACY)); |
770 |
greg |
2.1 |
return(0); |
771 |
|
|
} |