1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rtrace.c,v 2.55 2007/11/17 06:21:58 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* rtrace.c - program and variables for individual ray tracing. |
6 |
*/ |
7 |
|
8 |
#include "copyright.h" |
9 |
|
10 |
/* |
11 |
* Input is in the form: |
12 |
* |
13 |
* xorg yorg zorg xdir ydir zdir |
14 |
* |
15 |
* The direction need not be normalized. Output is flexible. |
16 |
* If the direction vector is (0,0,0), then the output is flushed. |
17 |
* All values default to ascii representation of real |
18 |
* numbers. Binary representations can be selected |
19 |
* with '-ff' for float or '-fd' for double. By default, |
20 |
* radiance is computed. The '-i' or '-I' options indicate that |
21 |
* irradiance values are desired. |
22 |
*/ |
23 |
|
24 |
#include <time.h> |
25 |
|
26 |
#include "platform.h" |
27 |
#include "ray.h" |
28 |
#include "ambient.h" |
29 |
#include "source.h" |
30 |
#include "otypes.h" |
31 |
#include "resolu.h" |
32 |
#include "random.h" |
33 |
|
34 |
CUBE thescene; /* our scene */ |
35 |
OBJECT nsceneobjs; /* number of objects in our scene */ |
36 |
|
37 |
int dimlist[MAXDIM]; /* sampling dimensions */ |
38 |
int ndims = 0; /* number of sampling dimensions */ |
39 |
int samplendx = 0; /* index for this sample */ |
40 |
|
41 |
int imm_irrad = 0; /* compute immediate irradiance? */ |
42 |
int lim_dist = 0; /* limit distance? */ |
43 |
|
44 |
int inform = 'a'; /* input format */ |
45 |
int outform = 'a'; /* output format */ |
46 |
char *outvals = "v"; /* output specification */ |
47 |
|
48 |
int do_irrad = 0; /* compute irradiance? */ |
49 |
|
50 |
int rand_samp = 1; /* pure Monte Carlo sampling? */ |
51 |
|
52 |
void (*trace)() = NULL; /* trace call */ |
53 |
|
54 |
#ifndef MAXMODLIST |
55 |
#define MAXMODLIST 1024 /* maximum modifiers we'll track */ |
56 |
#endif |
57 |
|
58 |
char *tralist[MAXMODLIST]; /* list of modifers to trace (or no) */ |
59 |
int traincl = -1; /* include == 1, exclude == 0 */ |
60 |
#ifndef MAXTSET |
61 |
#define MAXTSET 8191 /* maximum number in trace set */ |
62 |
#endif |
63 |
OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */ |
64 |
|
65 |
int hresolu = 0; /* horizontal (scan) size */ |
66 |
int vresolu = 0; /* vertical resolution */ |
67 |
|
68 |
double dstrsrc = 0.0; /* square source distribution */ |
69 |
double shadthresh = .03; /* shadow threshold */ |
70 |
double shadcert = .75; /* shadow certainty */ |
71 |
int directrelay = 2; /* number of source relays */ |
72 |
int vspretest = 512; /* virtual source pretest density */ |
73 |
int directvis = 1; /* sources visible? */ |
74 |
double srcsizerat = .2; /* maximum ratio source size/dist. */ |
75 |
|
76 |
COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
77 |
COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
78 |
double seccg = 0.; /* global scattering eccentricity */ |
79 |
double ssampdist = 0.; /* scatter sampling distance */ |
80 |
|
81 |
double specthresh = .15; /* specular sampling threshold */ |
82 |
double specjitter = 1.; /* specular sampling jitter */ |
83 |
|
84 |
int backvis = 1; /* back face visibility */ |
85 |
|
86 |
int maxdepth = -10; /* maximum recursion depth */ |
87 |
double minweight = 2e-3; /* minimum ray weight */ |
88 |
|
89 |
char *ambfile = NULL; /* ambient file name */ |
90 |
COLOR ambval = BLKCOLOR; /* ambient value */ |
91 |
int ambvwt = 0; /* initial weight for ambient value */ |
92 |
double ambacc = 0.15; /* ambient accuracy */ |
93 |
int ambres = 256; /* ambient resolution */ |
94 |
int ambdiv = 1024; /* ambient divisions */ |
95 |
int ambssamp = 512; /* ambient super-samples */ |
96 |
int ambounce = 0; /* ambient bounces */ |
97 |
char *amblist[AMBLLEN]; /* ambient include/exclude list */ |
98 |
int ambincl = -1; /* include == 1, exclude == 0 */ |
99 |
|
100 |
static int castonly = 0; |
101 |
|
102 |
static RAY thisray; /* for our convenience */ |
103 |
|
104 |
typedef void putf_t(double v); |
105 |
static putf_t puta, putd, putf; |
106 |
|
107 |
typedef void oputf_t(RAY *r); |
108 |
static oputf_t oputo, oputd, oputv, oputV, oputl, oputL, oputc, oputp, |
109 |
oputn, oputN, oputs, oputw, oputW, oputm, oputM, oputtilde; |
110 |
|
111 |
static void setoutput(char *vs); |
112 |
static void tranotify(OBJECT obj); |
113 |
static void bogusray(void); |
114 |
static void rad(FVECT org, FVECT dir, double dmax); |
115 |
static void irrad(FVECT org, FVECT dir); |
116 |
static void printvals(RAY *r); |
117 |
static int getvec(FVECT vec, int fmt, FILE *fp); |
118 |
static void tabin(RAY *r); |
119 |
static void ourtrace(RAY *r); |
120 |
|
121 |
static oputf_t *ray_out[16], *every_out[16]; |
122 |
static putf_t *putreal; |
123 |
|
124 |
void (*addobjnotify[])() = {ambnotify, tranotify, NULL}; |
125 |
|
126 |
|
127 |
void |
128 |
quit( /* quit program */ |
129 |
int code |
130 |
) |
131 |
{ |
132 |
#ifndef NON_POSIX /* XXX we don't clean up elsewhere? */ |
133 |
headclean(); /* delete header file */ |
134 |
pfclean(); /* clean up persist files */ |
135 |
#endif |
136 |
exit(code); |
137 |
} |
138 |
|
139 |
|
140 |
extern char * |
141 |
formstr( /* return format identifier */ |
142 |
int f |
143 |
) |
144 |
{ |
145 |
switch (f) { |
146 |
case 'a': return("ascii"); |
147 |
case 'f': return("float"); |
148 |
case 'd': return("double"); |
149 |
case 'c': return(COLRFMT); |
150 |
} |
151 |
return("unknown"); |
152 |
} |
153 |
|
154 |
|
155 |
extern void |
156 |
rtrace( /* trace rays from file */ |
157 |
char *fname |
158 |
) |
159 |
{ |
160 |
unsigned long vcount = (hresolu > 1) ? (unsigned long)hresolu*vresolu |
161 |
: vresolu; |
162 |
long nextflush = hresolu; |
163 |
FILE *fp; |
164 |
double d; |
165 |
FVECT orig, direc; |
166 |
/* set up input */ |
167 |
if (fname == NULL) |
168 |
fp = stdin; |
169 |
else if ((fp = fopen(fname, "r")) == NULL) { |
170 |
sprintf(errmsg, "cannot open input file \"%s\"", fname); |
171 |
error(SYSTEM, errmsg); |
172 |
} |
173 |
if (inform != 'a') |
174 |
SET_FILE_BINARY(fp); |
175 |
/* set up output */ |
176 |
setoutput(outvals); |
177 |
switch (outform) { |
178 |
case 'a': putreal = puta; break; |
179 |
case 'f': putreal = putf; break; |
180 |
case 'd': putreal = putd; break; |
181 |
case 'c': |
182 |
if (strcmp(outvals, "v")) |
183 |
error(USER, "color format with value output only"); |
184 |
break; |
185 |
default: |
186 |
error(CONSISTENCY, "botched output format"); |
187 |
} |
188 |
if (hresolu > 0) { |
189 |
if (vresolu > 0) |
190 |
fprtresolu(hresolu, vresolu, stdout); |
191 |
fflush(stdout); |
192 |
} |
193 |
/* process file */ |
194 |
while (getvec(orig, inform, fp) == 0 && |
195 |
getvec(direc, inform, fp) == 0) { |
196 |
|
197 |
d = normalize(direc); |
198 |
if (d == 0.0) { /* zero ==> flush */ |
199 |
bogusray(); |
200 |
if (--nextflush <= 0 || !vcount) { |
201 |
fflush(stdout); |
202 |
nextflush = hresolu; |
203 |
} |
204 |
} else { |
205 |
samplendx++; |
206 |
/* compute and print */ |
207 |
if (imm_irrad) |
208 |
irrad(orig, direc); |
209 |
else |
210 |
rad(orig, direc, lim_dist ? d : 0.0); |
211 |
/* flush if time */ |
212 |
if (!--nextflush) { |
213 |
fflush(stdout); |
214 |
nextflush = hresolu; |
215 |
} |
216 |
} |
217 |
if (ferror(stdout)) |
218 |
error(SYSTEM, "write error"); |
219 |
if (vcount && !--vcount) /* check for end */ |
220 |
break; |
221 |
} |
222 |
if (fflush(stdout) < 0) |
223 |
error(SYSTEM, "write error"); |
224 |
if (vcount) |
225 |
error(USER, "unexpected EOF on input"); |
226 |
if (fname != NULL) |
227 |
fclose(fp); |
228 |
} |
229 |
|
230 |
|
231 |
static void |
232 |
trace_sources(void) /* trace rays to light sources, also */ |
233 |
{ |
234 |
int sn; |
235 |
|
236 |
for (sn = 0; sn < nsources; sn++) |
237 |
source[sn].sflags |= SFOLLOW; |
238 |
} |
239 |
|
240 |
|
241 |
static void |
242 |
setoutput( /* set up output tables */ |
243 |
char *vs |
244 |
) |
245 |
{ |
246 |
oputf_t **table = ray_out; |
247 |
|
248 |
castonly = 1; |
249 |
while (*vs) |
250 |
switch (*vs++) { |
251 |
case 'T': /* trace sources */ |
252 |
if (!*vs) break; |
253 |
trace_sources(); |
254 |
/* fall through */ |
255 |
case 't': /* trace */ |
256 |
if (!*vs) break; |
257 |
*table = NULL; |
258 |
table = every_out; |
259 |
trace = ourtrace; |
260 |
castonly = 0; |
261 |
break; |
262 |
case 'o': /* origin */ |
263 |
*table++ = oputo; |
264 |
break; |
265 |
case 'd': /* direction */ |
266 |
*table++ = oputd; |
267 |
break; |
268 |
case 'v': /* value */ |
269 |
*table++ = oputv; |
270 |
castonly = 0; |
271 |
break; |
272 |
case 'V': /* contribution */ |
273 |
*table++ = oputV; |
274 |
if (ambounce > 0 && (ambacc > FTINY || ambssamp > 0)) |
275 |
error(WARNING, |
276 |
"-otV accuracy depends on -aa 0 -as 0"); |
277 |
break; |
278 |
case 'l': /* effective distance */ |
279 |
*table++ = oputl; |
280 |
castonly = 0; |
281 |
break; |
282 |
case 'c': /* local coordinates */ |
283 |
*table++ = oputc; |
284 |
break; |
285 |
case 'L': /* single ray length */ |
286 |
*table++ = oputL; |
287 |
break; |
288 |
case 'p': /* point */ |
289 |
*table++ = oputp; |
290 |
break; |
291 |
case 'n': /* perturbed normal */ |
292 |
*table++ = oputn; |
293 |
castonly = 0; |
294 |
break; |
295 |
case 'N': /* unperturbed normal */ |
296 |
*table++ = oputN; |
297 |
break; |
298 |
case 's': /* surface */ |
299 |
*table++ = oputs; |
300 |
break; |
301 |
case 'w': /* weight */ |
302 |
*table++ = oputw; |
303 |
break; |
304 |
case 'W': /* coefficient */ |
305 |
*table++ = oputW; |
306 |
if (ambounce > 0 && (ambacc > FTINY || ambssamp > 0)) |
307 |
error(WARNING, |
308 |
"-otW accuracy depends on -aa 0 -as 0"); |
309 |
break; |
310 |
case 'm': /* modifier */ |
311 |
*table++ = oputm; |
312 |
break; |
313 |
case 'M': /* material */ |
314 |
*table++ = oputM; |
315 |
break; |
316 |
case '~': /* tilde */ |
317 |
*table++ = oputtilde; |
318 |
break; |
319 |
} |
320 |
*table = NULL; |
321 |
} |
322 |
|
323 |
|
324 |
static void |
325 |
bogusray(void) /* print out empty record */ |
326 |
{ |
327 |
thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] = |
328 |
thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0; |
329 |
thisray.rmax = 0.0; |
330 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
331 |
printvals(&thisray); |
332 |
} |
333 |
|
334 |
|
335 |
static void |
336 |
rad( /* compute and print ray value(s) */ |
337 |
FVECT org, |
338 |
FVECT dir, |
339 |
double dmax |
340 |
) |
341 |
{ |
342 |
VCOPY(thisray.rorg, org); |
343 |
VCOPY(thisray.rdir, dir); |
344 |
thisray.rmax = dmax; |
345 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
346 |
if (castonly) { |
347 |
if (!localhit(&thisray, &thescene)) { |
348 |
if (thisray.ro == &Aftplane) { /* clipped */ |
349 |
thisray.ro = NULL; |
350 |
thisray.rot = FHUGE; |
351 |
} else |
352 |
sourcehit(&thisray); |
353 |
} |
354 |
} else |
355 |
rayvalue(&thisray); |
356 |
printvals(&thisray); |
357 |
} |
358 |
|
359 |
|
360 |
static void |
361 |
irrad( /* compute immediate irradiance value */ |
362 |
FVECT org, |
363 |
FVECT dir |
364 |
) |
365 |
{ |
366 |
VSUM(thisray.rorg, org, dir, 1.1e-4); |
367 |
thisray.rdir[0] = -dir[0]; |
368 |
thisray.rdir[1] = -dir[1]; |
369 |
thisray.rdir[2] = -dir[2]; |
370 |
thisray.rmax = 0.0; |
371 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
372 |
/* pretend we hit surface */ |
373 |
thisray.rot = 1e-5; |
374 |
thisray.rod = 1.0; |
375 |
VCOPY(thisray.ron, dir); |
376 |
VSUM(thisray.rop, org, dir, 1e-4); |
377 |
/* compute and print */ |
378 |
(*ofun[Lamb.otype].funp)(&Lamb, &thisray); |
379 |
printvals(&thisray); |
380 |
} |
381 |
|
382 |
|
383 |
static void |
384 |
printvals( /* print requested ray values */ |
385 |
RAY *r |
386 |
) |
387 |
{ |
388 |
oputf_t **tp; |
389 |
|
390 |
if (ray_out[0] == NULL) |
391 |
return; |
392 |
for (tp = ray_out; *tp != NULL; tp++) |
393 |
(**tp)(r); |
394 |
if (outform == 'a') |
395 |
putchar('\n'); |
396 |
} |
397 |
|
398 |
|
399 |
static int |
400 |
getvec( /* get a vector from fp */ |
401 |
FVECT vec, |
402 |
int fmt, |
403 |
FILE *fp |
404 |
) |
405 |
{ |
406 |
static float vf[3]; |
407 |
static double vd[3]; |
408 |
char buf[32]; |
409 |
int i; |
410 |
|
411 |
switch (fmt) { |
412 |
case 'a': /* ascii */ |
413 |
for (i = 0; i < 3; i++) { |
414 |
if (fgetword(buf, sizeof(buf), fp) == NULL || |
415 |
!isflt(buf)) |
416 |
return(-1); |
417 |
vec[i] = atof(buf); |
418 |
} |
419 |
break; |
420 |
case 'f': /* binary float */ |
421 |
if (fread((char *)vf, sizeof(float), 3, fp) != 3) |
422 |
return(-1); |
423 |
vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2]; |
424 |
break; |
425 |
case 'd': /* binary double */ |
426 |
if (fread((char *)vd, sizeof(double), 3, fp) != 3) |
427 |
return(-1); |
428 |
vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2]; |
429 |
break; |
430 |
default: |
431 |
error(CONSISTENCY, "botched input format"); |
432 |
} |
433 |
return(0); |
434 |
} |
435 |
|
436 |
|
437 |
static void |
438 |
tranotify( /* record new modifier */ |
439 |
OBJECT obj |
440 |
) |
441 |
{ |
442 |
static int hitlimit = 0; |
443 |
OBJREC *o = objptr(obj); |
444 |
char **tralp; |
445 |
|
446 |
if (obj == OVOID) { /* starting over */ |
447 |
traset[0] = 0; |
448 |
hitlimit = 0; |
449 |
return; |
450 |
} |
451 |
if (hitlimit || !ismodifier(o->otype)) |
452 |
return; |
453 |
for (tralp = tralist; *tralp != NULL; tralp++) |
454 |
if (!strcmp(o->oname, *tralp)) { |
455 |
if (traset[0] >= MAXTSET) { |
456 |
error(WARNING, "too many modifiers in trace list"); |
457 |
hitlimit++; |
458 |
return; /* should this be fatal? */ |
459 |
} |
460 |
insertelem(traset, obj); |
461 |
return; |
462 |
} |
463 |
} |
464 |
|
465 |
|
466 |
static void |
467 |
ourtrace( /* print ray values */ |
468 |
RAY *r |
469 |
) |
470 |
{ |
471 |
oputf_t **tp; |
472 |
|
473 |
if (every_out[0] == NULL) |
474 |
return; |
475 |
if (r->ro == NULL) { |
476 |
if (traincl == 1) |
477 |
return; |
478 |
} else if (traincl != -1 && traincl != inset(traset, r->ro->omod)) |
479 |
return; |
480 |
tabin(r); |
481 |
for (tp = every_out; *tp != NULL; tp++) |
482 |
(**tp)(r); |
483 |
if (outform == 'a') |
484 |
putchar('\n'); |
485 |
} |
486 |
|
487 |
|
488 |
static void |
489 |
tabin( /* tab in appropriate amount */ |
490 |
RAY *r |
491 |
) |
492 |
{ |
493 |
const RAY *rp; |
494 |
|
495 |
for (rp = r->parent; rp != NULL; rp = rp->parent) |
496 |
putchar('\t'); |
497 |
} |
498 |
|
499 |
|
500 |
static void |
501 |
oputo( /* print origin */ |
502 |
RAY *r |
503 |
) |
504 |
{ |
505 |
(*putreal)(r->rorg[0]); |
506 |
(*putreal)(r->rorg[1]); |
507 |
(*putreal)(r->rorg[2]); |
508 |
} |
509 |
|
510 |
|
511 |
static void |
512 |
oputd( /* print direction */ |
513 |
RAY *r |
514 |
) |
515 |
{ |
516 |
(*putreal)(r->rdir[0]); |
517 |
(*putreal)(r->rdir[1]); |
518 |
(*putreal)(r->rdir[2]); |
519 |
} |
520 |
|
521 |
|
522 |
static void |
523 |
oputv( /* print value */ |
524 |
RAY *r |
525 |
) |
526 |
{ |
527 |
if (outform == 'c') { |
528 |
COLR cout; |
529 |
setcolr(cout, colval(r->rcol,RED), |
530 |
colval(r->rcol,GRN), |
531 |
colval(r->rcol,BLU)); |
532 |
fwrite((char *)cout, sizeof(cout), 1, stdout); |
533 |
return; |
534 |
} |
535 |
(*putreal)(colval(r->rcol,RED)); |
536 |
(*putreal)(colval(r->rcol,GRN)); |
537 |
(*putreal)(colval(r->rcol,BLU)); |
538 |
} |
539 |
|
540 |
|
541 |
static void |
542 |
oputV( /* print value contribution */ |
543 |
RAY *r |
544 |
) |
545 |
{ |
546 |
double contr[3]; |
547 |
|
548 |
raycontrib(contr, r, PRIMARY); |
549 |
multcolor(contr, r->rcol); |
550 |
(*putreal)(contr[RED]); |
551 |
(*putreal)(contr[GRN]); |
552 |
(*putreal)(contr[BLU]); |
553 |
} |
554 |
|
555 |
|
556 |
static void |
557 |
oputl( /* print effective distance */ |
558 |
RAY *r |
559 |
) |
560 |
{ |
561 |
(*putreal)(r->rt); |
562 |
} |
563 |
|
564 |
|
565 |
static void |
566 |
oputL( /* print single ray length */ |
567 |
RAY *r |
568 |
) |
569 |
{ |
570 |
(*putreal)(r->rot); |
571 |
} |
572 |
|
573 |
|
574 |
static void |
575 |
oputc( /* print local coordinates */ |
576 |
RAY *r |
577 |
) |
578 |
{ |
579 |
(*putreal)(r->uv[0]); |
580 |
(*putreal)(r->uv[1]); |
581 |
} |
582 |
|
583 |
|
584 |
static void |
585 |
oputp( /* print point */ |
586 |
RAY *r |
587 |
) |
588 |
{ |
589 |
if (r->rot < FHUGE) { |
590 |
(*putreal)(r->rop[0]); |
591 |
(*putreal)(r->rop[1]); |
592 |
(*putreal)(r->rop[2]); |
593 |
} else { |
594 |
(*putreal)(0.0); |
595 |
(*putreal)(0.0); |
596 |
(*putreal)(0.0); |
597 |
} |
598 |
} |
599 |
|
600 |
|
601 |
static void |
602 |
oputN( /* print unperturbed normal */ |
603 |
RAY *r |
604 |
) |
605 |
{ |
606 |
if (r->rot < FHUGE) { |
607 |
(*putreal)(r->ron[0]); |
608 |
(*putreal)(r->ron[1]); |
609 |
(*putreal)(r->ron[2]); |
610 |
} else { |
611 |
(*putreal)(0.0); |
612 |
(*putreal)(0.0); |
613 |
(*putreal)(0.0); |
614 |
} |
615 |
} |
616 |
|
617 |
|
618 |
static void |
619 |
oputn( /* print perturbed normal */ |
620 |
RAY *r |
621 |
) |
622 |
{ |
623 |
FVECT pnorm; |
624 |
|
625 |
if (r->rot >= FHUGE) { |
626 |
(*putreal)(0.0); |
627 |
(*putreal)(0.0); |
628 |
(*putreal)(0.0); |
629 |
return; |
630 |
} |
631 |
raynormal(pnorm, r); |
632 |
(*putreal)(pnorm[0]); |
633 |
(*putreal)(pnorm[1]); |
634 |
(*putreal)(pnorm[2]); |
635 |
} |
636 |
|
637 |
|
638 |
static void |
639 |
oputs( /* print name */ |
640 |
RAY *r |
641 |
) |
642 |
{ |
643 |
if (r->ro != NULL) |
644 |
fputs(r->ro->oname, stdout); |
645 |
else |
646 |
putchar('*'); |
647 |
putchar('\t'); |
648 |
} |
649 |
|
650 |
|
651 |
static void |
652 |
oputw( /* print weight */ |
653 |
RAY *r |
654 |
) |
655 |
{ |
656 |
(*putreal)(r->rweight); |
657 |
} |
658 |
|
659 |
|
660 |
static void |
661 |
oputW( /* print coefficient */ |
662 |
RAY *r |
663 |
) |
664 |
{ |
665 |
double contr[3]; |
666 |
|
667 |
raycontrib(contr, r, PRIMARY); |
668 |
(*putreal)(contr[RED]); |
669 |
(*putreal)(contr[GRN]); |
670 |
(*putreal)(contr[BLU]); |
671 |
} |
672 |
|
673 |
|
674 |
static void |
675 |
oputm( /* print modifier */ |
676 |
RAY *r |
677 |
) |
678 |
{ |
679 |
if (r->ro != NULL) |
680 |
if (r->ro->omod != OVOID) |
681 |
fputs(objptr(r->ro->omod)->oname, stdout); |
682 |
else |
683 |
fputs(VOIDID, stdout); |
684 |
else |
685 |
putchar('*'); |
686 |
putchar('\t'); |
687 |
} |
688 |
|
689 |
|
690 |
static void |
691 |
oputM( /* print material */ |
692 |
RAY *r |
693 |
) |
694 |
{ |
695 |
OBJREC *mat; |
696 |
|
697 |
if (r->ro != NULL) { |
698 |
if ((mat = findmaterial(r->ro)) != NULL) |
699 |
fputs(mat->oname, stdout); |
700 |
else |
701 |
fputs(VOIDID, stdout); |
702 |
} else |
703 |
putchar('*'); |
704 |
putchar('\t'); |
705 |
} |
706 |
|
707 |
|
708 |
static void |
709 |
oputtilde( /* output tilde (spacer) */ |
710 |
RAY *r |
711 |
) |
712 |
{ |
713 |
fputs("~\t", stdout); |
714 |
} |
715 |
|
716 |
|
717 |
static void |
718 |
puta( /* print ascii value */ |
719 |
double v |
720 |
) |
721 |
{ |
722 |
printf("%e\t", v); |
723 |
} |
724 |
|
725 |
|
726 |
static void |
727 |
putd(v) /* print binary double */ |
728 |
double v; |
729 |
{ |
730 |
fwrite((char *)&v, sizeof(v), 1, stdout); |
731 |
} |
732 |
|
733 |
|
734 |
static void |
735 |
putf(v) /* print binary float */ |
736 |
double v; |
737 |
{ |
738 |
float f = v; |
739 |
|
740 |
fwrite((char *)&f, sizeof(f), 1, stdout); |
741 |
} |