1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rtrace.c,v 2.62 2009/12/14 07:31:37 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* rtrace.c - program and variables for individual ray tracing. |
6 |
*/ |
7 |
|
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#include "copyright.h" |
9 |
|
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/* |
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* Input is in the form: |
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* |
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* xorg yorg zorg xdir ydir zdir |
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* |
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* The direction need not be normalized. Output is flexible. |
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* If the direction vector is (0,0,0), then the output is flushed. |
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* All values default to ascii representation of real |
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* numbers. Binary representations can be selected |
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* with '-ff' for float or '-fd' for double. By default, |
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* radiance is computed. The '-i' or '-I' options indicate that |
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* irradiance values are desired. |
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*/ |
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|
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#include <time.h> |
25 |
|
26 |
#include "platform.h" |
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#include "ray.h" |
28 |
#include "ambient.h" |
29 |
#include "source.h" |
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#include "otypes.h" |
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#include "resolu.h" |
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#include "random.h" |
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|
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extern int inform; /* input format */ |
35 |
extern int outform; /* output format */ |
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extern char *outvals; /* output values */ |
37 |
|
38 |
extern int imm_irrad; /* compute immediate irradiance? */ |
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extern int lim_dist; /* limit distance? */ |
40 |
|
41 |
extern char *tralist[]; /* list of modifers to trace (or no) */ |
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extern int traincl; /* include == 1, exclude == 0 */ |
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|
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extern int hresolu; /* horizontal resolution */ |
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extern int vresolu; /* vertical resolution */ |
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|
47 |
static int castonly = 0; |
48 |
|
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#ifndef MAXTSET |
50 |
#define MAXTSET 8191 /* maximum number in trace set */ |
51 |
#endif |
52 |
OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */ |
53 |
|
54 |
static RAY thisray; /* for our convenience */ |
55 |
|
56 |
typedef void putf_t(double v); |
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static putf_t puta, putd, putf; |
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|
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typedef void oputf_t(RAY *r); |
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static oputf_t oputo, oputd, oputv, oputV, oputl, oputL, oputc, oputp, |
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oputn, oputN, oputs, oputw, oputW, oputm, oputM, oputtilde; |
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|
63 |
static void setoutput(char *vs); |
64 |
extern void tranotify(OBJECT obj); |
65 |
static void bogusray(void); |
66 |
static void raycast(RAY *r); |
67 |
static void rayirrad(RAY *r); |
68 |
static void rtcompute(FVECT org, FVECT dir, double dmax); |
69 |
static int printvals(RAY *r); |
70 |
static int getvec(FVECT vec, int fmt, FILE *fp); |
71 |
static void tabin(RAY *r); |
72 |
static void ourtrace(RAY *r); |
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|
74 |
static oputf_t *ray_out[16], *every_out[16]; |
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static putf_t *putreal; |
76 |
|
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|
78 |
void |
79 |
quit( /* quit program */ |
80 |
int code |
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) |
82 |
{ |
83 |
if (ray_pnprocs > 0) /* close children if any */ |
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ray_pclose(0); |
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#ifndef NON_POSIX |
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else if (!ray_pnprocs) { |
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headclean(); /* delete header file */ |
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pfclean(); /* clean up persist files */ |
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} |
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#endif |
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exit(code); |
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} |
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|
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|
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char * |
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formstr( /* return format identifier */ |
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int f |
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) |
99 |
{ |
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switch (f) { |
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case 'a': return("ascii"); |
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case 'f': return("float"); |
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case 'd': return("double"); |
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case 'c': return(COLRFMT); |
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} |
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return("unknown"); |
107 |
} |
108 |
|
109 |
|
110 |
extern void |
111 |
rtrace( /* trace rays from file */ |
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char *fname, |
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int nproc |
114 |
) |
115 |
{ |
116 |
unsigned long vcount = (hresolu > 1) ? (unsigned long)hresolu*vresolu |
117 |
: vresolu; |
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long nextflush = hresolu; |
119 |
FILE *fp; |
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double d; |
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FVECT orig, direc; |
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/* set up input */ |
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if (fname == NULL) |
124 |
fp = stdin; |
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else if ((fp = fopen(fname, "r")) == NULL) { |
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sprintf(errmsg, "cannot open input file \"%s\"", fname); |
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error(SYSTEM, errmsg); |
128 |
} |
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if (inform != 'a') |
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SET_FILE_BINARY(fp); |
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/* set up output */ |
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setoutput(outvals); |
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if (imm_irrad) |
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castonly = 0; |
135 |
else if (castonly) |
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nproc = 1; /* don't bother multiprocessing */ |
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switch (outform) { |
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case 'a': putreal = puta; break; |
139 |
case 'f': putreal = putf; break; |
140 |
case 'd': putreal = putd; break; |
141 |
case 'c': |
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if (strcmp(outvals, "v")) |
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error(USER, "color format with value output only"); |
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break; |
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default: |
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error(CONSISTENCY, "botched output format"); |
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} |
148 |
if (nproc > 1) { /* start multiprocessing */ |
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ray_popen(nproc); |
150 |
ray_fifo_out = printvals; |
151 |
} |
152 |
if (hresolu > 0) { |
153 |
if (vresolu > 0) |
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fprtresolu(hresolu, vresolu, stdout); |
155 |
fflush(stdout); |
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} |
157 |
/* process file */ |
158 |
while (getvec(orig, inform, fp) == 0 && |
159 |
getvec(direc, inform, fp) == 0) { |
160 |
|
161 |
d = normalize(direc); |
162 |
if (d == 0.0) { /* zero ==> flush */ |
163 |
if (--nextflush <= 0 || !vcount) { |
164 |
if (nproc > 1 && ray_fifo_flush() < 0) |
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error(USER, "lost children"); |
166 |
bogusray(); |
167 |
fflush(stdout); |
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nextflush = hresolu; |
169 |
} else |
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bogusray(); |
171 |
} else { /* compute and print */ |
172 |
rtcompute(orig, direc, lim_dist ? d : 0.0); |
173 |
/* flush if time */ |
174 |
if (!--nextflush) { |
175 |
if (nproc > 1 && ray_fifo_flush() < 0) |
176 |
error(USER, "lost children"); |
177 |
fflush(stdout); |
178 |
nextflush = hresolu; |
179 |
} |
180 |
} |
181 |
if (ferror(stdout)) |
182 |
error(SYSTEM, "write error"); |
183 |
if (vcount && !--vcount) /* check for end */ |
184 |
break; |
185 |
} |
186 |
if (nproc > 1) { /* clean up children */ |
187 |
if (ray_fifo_flush() < 0) |
188 |
error(USER, "unable to complete processing"); |
189 |
ray_pclose(0); |
190 |
} |
191 |
if (fflush(stdout) < 0) |
192 |
error(SYSTEM, "write error"); |
193 |
if (vcount) |
194 |
error(USER, "unexpected EOF on input"); |
195 |
if (fname != NULL) |
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fclose(fp); |
197 |
} |
198 |
|
199 |
|
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static void |
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trace_sources(void) /* trace rays to light sources, also */ |
202 |
{ |
203 |
int sn; |
204 |
|
205 |
for (sn = 0; sn < nsources; sn++) |
206 |
source[sn].sflags |= SFOLLOW; |
207 |
} |
208 |
|
209 |
|
210 |
static void |
211 |
setoutput( /* set up output tables */ |
212 |
char *vs |
213 |
) |
214 |
{ |
215 |
oputf_t **table = ray_out; |
216 |
|
217 |
castonly = 1; |
218 |
while (*vs) |
219 |
switch (*vs++) { |
220 |
case 'T': /* trace sources */ |
221 |
if (!*vs) break; |
222 |
trace_sources(); |
223 |
/* fall through */ |
224 |
case 't': /* trace */ |
225 |
if (!*vs) break; |
226 |
*table = NULL; |
227 |
table = every_out; |
228 |
trace = ourtrace; |
229 |
castonly = 0; |
230 |
break; |
231 |
case 'o': /* origin */ |
232 |
*table++ = oputo; |
233 |
break; |
234 |
case 'd': /* direction */ |
235 |
*table++ = oputd; |
236 |
break; |
237 |
case 'v': /* value */ |
238 |
*table++ = oputv; |
239 |
castonly = 0; |
240 |
break; |
241 |
case 'V': /* contribution */ |
242 |
*table++ = oputV; |
243 |
if (ambounce > 0 && (ambacc > FTINY || ambssamp > 0)) |
244 |
error(WARNING, |
245 |
"-otV accuracy depends on -aa 0 -as 0"); |
246 |
break; |
247 |
case 'l': /* effective distance */ |
248 |
*table++ = oputl; |
249 |
castonly = 0; |
250 |
break; |
251 |
case 'c': /* local coordinates */ |
252 |
*table++ = oputc; |
253 |
break; |
254 |
case 'L': /* single ray length */ |
255 |
*table++ = oputL; |
256 |
break; |
257 |
case 'p': /* point */ |
258 |
*table++ = oputp; |
259 |
break; |
260 |
case 'n': /* perturbed normal */ |
261 |
*table++ = oputn; |
262 |
castonly = 0; |
263 |
break; |
264 |
case 'N': /* unperturbed normal */ |
265 |
*table++ = oputN; |
266 |
break; |
267 |
case 's': /* surface */ |
268 |
*table++ = oputs; |
269 |
break; |
270 |
case 'w': /* weight */ |
271 |
*table++ = oputw; |
272 |
break; |
273 |
case 'W': /* coefficient */ |
274 |
*table++ = oputW; |
275 |
if (ambounce > 0 && (ambacc > FTINY || ambssamp > 0)) |
276 |
error(WARNING, |
277 |
"-otW accuracy depends on -aa 0 -as 0"); |
278 |
break; |
279 |
case 'm': /* modifier */ |
280 |
*table++ = oputm; |
281 |
break; |
282 |
case 'M': /* material */ |
283 |
*table++ = oputM; |
284 |
break; |
285 |
case '~': /* tilde */ |
286 |
*table++ = oputtilde; |
287 |
break; |
288 |
} |
289 |
*table = NULL; |
290 |
} |
291 |
|
292 |
|
293 |
static void |
294 |
bogusray(void) /* print out empty record */ |
295 |
{ |
296 |
thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] = |
297 |
thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0; |
298 |
thisray.rmax = 0.0; |
299 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
300 |
printvals(&thisray); |
301 |
} |
302 |
|
303 |
|
304 |
static void |
305 |
raycast( /* compute first ray intersection only */ |
306 |
RAY *r |
307 |
) |
308 |
{ |
309 |
if (!localhit(r, &thescene)) { |
310 |
if (r->ro == &Aftplane) { /* clipped */ |
311 |
r->ro = NULL; |
312 |
r->rot = FHUGE; |
313 |
} else |
314 |
sourcehit(r); |
315 |
} |
316 |
} |
317 |
|
318 |
|
319 |
static void |
320 |
rayirrad( /* compute irradiance rather than radiance */ |
321 |
RAY *r |
322 |
) |
323 |
{ |
324 |
void (*old_revf)(RAY *) = r->revf; |
325 |
|
326 |
r->rot = 1e-5; /* pretend we hit surface */ |
327 |
VSUM(r->rop, r->rorg, r->rdir, r->rot); |
328 |
r->ron[0] = -r->rdir[0]; |
329 |
r->ron[1] = -r->rdir[1]; |
330 |
r->ron[2] = -r->rdir[2]; |
331 |
r->rod = 1.0; |
332 |
/* compute result */ |
333 |
r->revf = raytrace; |
334 |
(*ofun[Lamb.otype].funp)(&Lamb, r); |
335 |
r->revf = old_revf; |
336 |
} |
337 |
|
338 |
|
339 |
static void |
340 |
rtcompute( /* compute and print ray value(s) */ |
341 |
FVECT org, |
342 |
FVECT dir, |
343 |
double dmax |
344 |
) |
345 |
{ |
346 |
/* set up ray */ |
347 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
348 |
if (imm_irrad) { |
349 |
VSUM(thisray.rorg, org, dir, 1.1e-4); |
350 |
thisray.rdir[0] = -dir[0]; |
351 |
thisray.rdir[1] = -dir[1]; |
352 |
thisray.rdir[2] = -dir[2]; |
353 |
thisray.rmax = 0.0; |
354 |
thisray.revf = rayirrad; |
355 |
} else { |
356 |
VCOPY(thisray.rorg, org); |
357 |
VCOPY(thisray.rdir, dir); |
358 |
thisray.rmax = dmax; |
359 |
if (castonly) |
360 |
thisray.revf = raycast; |
361 |
} |
362 |
if (ray_pnprocs > 1) { /* multiprocessing FIFO? */ |
363 |
if (ray_fifo_in(&thisray) < 0) |
364 |
error(USER, "lost children"); |
365 |
return; |
366 |
} |
367 |
samplendx++; /* else do it ourselves */ |
368 |
rayvalue(&thisray); |
369 |
printvals(&thisray); |
370 |
} |
371 |
|
372 |
|
373 |
static int |
374 |
printvals( /* print requested ray values */ |
375 |
RAY *r |
376 |
) |
377 |
{ |
378 |
oputf_t **tp; |
379 |
|
380 |
if (ray_out[0] == NULL) |
381 |
return(0); |
382 |
for (tp = ray_out; *tp != NULL; tp++) |
383 |
(**tp)(r); |
384 |
if (outform == 'a') |
385 |
putchar('\n'); |
386 |
return(1); |
387 |
} |
388 |
|
389 |
|
390 |
static int |
391 |
getvec( /* get a vector from fp */ |
392 |
FVECT vec, |
393 |
int fmt, |
394 |
FILE *fp |
395 |
) |
396 |
{ |
397 |
static float vf[3]; |
398 |
static double vd[3]; |
399 |
char buf[32]; |
400 |
int i; |
401 |
|
402 |
switch (fmt) { |
403 |
case 'a': /* ascii */ |
404 |
for (i = 0; i < 3; i++) { |
405 |
if (fgetword(buf, sizeof(buf), fp) == NULL || |
406 |
!isflt(buf)) |
407 |
return(-1); |
408 |
vec[i] = atof(buf); |
409 |
} |
410 |
break; |
411 |
case 'f': /* binary float */ |
412 |
if (fread((char *)vf, sizeof(float), 3, fp) != 3) |
413 |
return(-1); |
414 |
VCOPY(vec, vf); |
415 |
break; |
416 |
case 'd': /* binary double */ |
417 |
if (fread((char *)vd, sizeof(double), 3, fp) != 3) |
418 |
return(-1); |
419 |
VCOPY(vec, vd); |
420 |
break; |
421 |
default: |
422 |
error(CONSISTENCY, "botched input format"); |
423 |
} |
424 |
return(0); |
425 |
} |
426 |
|
427 |
|
428 |
void |
429 |
tranotify( /* record new modifier */ |
430 |
OBJECT obj |
431 |
) |
432 |
{ |
433 |
static int hitlimit = 0; |
434 |
OBJREC *o = objptr(obj); |
435 |
char **tralp; |
436 |
|
437 |
if (obj == OVOID) { /* starting over */ |
438 |
traset[0] = 0; |
439 |
hitlimit = 0; |
440 |
return; |
441 |
} |
442 |
if (hitlimit || !ismodifier(o->otype)) |
443 |
return; |
444 |
for (tralp = tralist; *tralp != NULL; tralp++) |
445 |
if (!strcmp(o->oname, *tralp)) { |
446 |
if (traset[0] >= MAXTSET) { |
447 |
error(WARNING, "too many modifiers in trace list"); |
448 |
hitlimit++; |
449 |
return; /* should this be fatal? */ |
450 |
} |
451 |
insertelem(traset, obj); |
452 |
return; |
453 |
} |
454 |
} |
455 |
|
456 |
|
457 |
static void |
458 |
ourtrace( /* print ray values */ |
459 |
RAY *r |
460 |
) |
461 |
{ |
462 |
oputf_t **tp; |
463 |
|
464 |
if (every_out[0] == NULL) |
465 |
return; |
466 |
if (r->ro == NULL) { |
467 |
if (traincl == 1) |
468 |
return; |
469 |
} else if (traincl != -1 && traincl != inset(traset, r->ro->omod)) |
470 |
return; |
471 |
tabin(r); |
472 |
for (tp = every_out; *tp != NULL; tp++) |
473 |
(**tp)(r); |
474 |
if (outform == 'a') |
475 |
putchar('\n'); |
476 |
} |
477 |
|
478 |
|
479 |
static void |
480 |
tabin( /* tab in appropriate amount */ |
481 |
RAY *r |
482 |
) |
483 |
{ |
484 |
const RAY *rp; |
485 |
|
486 |
for (rp = r->parent; rp != NULL; rp = rp->parent) |
487 |
putchar('\t'); |
488 |
} |
489 |
|
490 |
|
491 |
static void |
492 |
oputo( /* print origin */ |
493 |
RAY *r |
494 |
) |
495 |
{ |
496 |
(*putreal)(r->rorg[0]); |
497 |
(*putreal)(r->rorg[1]); |
498 |
(*putreal)(r->rorg[2]); |
499 |
} |
500 |
|
501 |
|
502 |
static void |
503 |
oputd( /* print direction */ |
504 |
RAY *r |
505 |
) |
506 |
{ |
507 |
(*putreal)(r->rdir[0]); |
508 |
(*putreal)(r->rdir[1]); |
509 |
(*putreal)(r->rdir[2]); |
510 |
} |
511 |
|
512 |
|
513 |
static void |
514 |
oputv( /* print value */ |
515 |
RAY *r |
516 |
) |
517 |
{ |
518 |
if (outform == 'c') { |
519 |
COLR cout; |
520 |
setcolr(cout, colval(r->rcol,RED), |
521 |
colval(r->rcol,GRN), |
522 |
colval(r->rcol,BLU)); |
523 |
fwrite((char *)cout, sizeof(cout), 1, stdout); |
524 |
return; |
525 |
} |
526 |
(*putreal)(colval(r->rcol,RED)); |
527 |
(*putreal)(colval(r->rcol,GRN)); |
528 |
(*putreal)(colval(r->rcol,BLU)); |
529 |
} |
530 |
|
531 |
|
532 |
static void |
533 |
oputV( /* print value contribution */ |
534 |
RAY *r |
535 |
) |
536 |
{ |
537 |
double contr[3]; |
538 |
|
539 |
raycontrib(contr, r, PRIMARY); |
540 |
multcolor(contr, r->rcol); |
541 |
(*putreal)(contr[RED]); |
542 |
(*putreal)(contr[GRN]); |
543 |
(*putreal)(contr[BLU]); |
544 |
} |
545 |
|
546 |
|
547 |
static void |
548 |
oputl( /* print effective distance */ |
549 |
RAY *r |
550 |
) |
551 |
{ |
552 |
(*putreal)(r->rt); |
553 |
} |
554 |
|
555 |
|
556 |
static void |
557 |
oputL( /* print single ray length */ |
558 |
RAY *r |
559 |
) |
560 |
{ |
561 |
(*putreal)(r->rot); |
562 |
} |
563 |
|
564 |
|
565 |
static void |
566 |
oputc( /* print local coordinates */ |
567 |
RAY *r |
568 |
) |
569 |
{ |
570 |
(*putreal)(r->uv[0]); |
571 |
(*putreal)(r->uv[1]); |
572 |
} |
573 |
|
574 |
|
575 |
static void |
576 |
oputp( /* print point */ |
577 |
RAY *r |
578 |
) |
579 |
{ |
580 |
if (r->rot < FHUGE) { |
581 |
(*putreal)(r->rop[0]); |
582 |
(*putreal)(r->rop[1]); |
583 |
(*putreal)(r->rop[2]); |
584 |
} else { |
585 |
(*putreal)(0.0); |
586 |
(*putreal)(0.0); |
587 |
(*putreal)(0.0); |
588 |
} |
589 |
} |
590 |
|
591 |
|
592 |
static void |
593 |
oputN( /* print unperturbed normal */ |
594 |
RAY *r |
595 |
) |
596 |
{ |
597 |
if (r->rot < FHUGE) { |
598 |
(*putreal)(r->ron[0]); |
599 |
(*putreal)(r->ron[1]); |
600 |
(*putreal)(r->ron[2]); |
601 |
} else { |
602 |
(*putreal)(0.0); |
603 |
(*putreal)(0.0); |
604 |
(*putreal)(0.0); |
605 |
} |
606 |
} |
607 |
|
608 |
|
609 |
static void |
610 |
oputn( /* print perturbed normal */ |
611 |
RAY *r |
612 |
) |
613 |
{ |
614 |
FVECT pnorm; |
615 |
|
616 |
if (r->rot >= FHUGE) { |
617 |
(*putreal)(0.0); |
618 |
(*putreal)(0.0); |
619 |
(*putreal)(0.0); |
620 |
return; |
621 |
} |
622 |
raynormal(pnorm, r); |
623 |
(*putreal)(pnorm[0]); |
624 |
(*putreal)(pnorm[1]); |
625 |
(*putreal)(pnorm[2]); |
626 |
} |
627 |
|
628 |
|
629 |
static void |
630 |
oputs( /* print name */ |
631 |
RAY *r |
632 |
) |
633 |
{ |
634 |
if (r->ro != NULL) |
635 |
fputs(r->ro->oname, stdout); |
636 |
else |
637 |
putchar('*'); |
638 |
putchar('\t'); |
639 |
} |
640 |
|
641 |
|
642 |
static void |
643 |
oputw( /* print weight */ |
644 |
RAY *r |
645 |
) |
646 |
{ |
647 |
(*putreal)(r->rweight); |
648 |
} |
649 |
|
650 |
|
651 |
static void |
652 |
oputW( /* print coefficient */ |
653 |
RAY *r |
654 |
) |
655 |
{ |
656 |
double contr[3]; |
657 |
|
658 |
raycontrib(contr, r, PRIMARY); |
659 |
(*putreal)(contr[RED]); |
660 |
(*putreal)(contr[GRN]); |
661 |
(*putreal)(contr[BLU]); |
662 |
} |
663 |
|
664 |
|
665 |
static void |
666 |
oputm( /* print modifier */ |
667 |
RAY *r |
668 |
) |
669 |
{ |
670 |
if (r->ro != NULL) |
671 |
if (r->ro->omod != OVOID) |
672 |
fputs(objptr(r->ro->omod)->oname, stdout); |
673 |
else |
674 |
fputs(VOIDID, stdout); |
675 |
else |
676 |
putchar('*'); |
677 |
putchar('\t'); |
678 |
} |
679 |
|
680 |
|
681 |
static void |
682 |
oputM( /* print material */ |
683 |
RAY *r |
684 |
) |
685 |
{ |
686 |
OBJREC *mat; |
687 |
|
688 |
if (r->ro != NULL) { |
689 |
if ((mat = findmaterial(r->ro)) != NULL) |
690 |
fputs(mat->oname, stdout); |
691 |
else |
692 |
fputs(VOIDID, stdout); |
693 |
} else |
694 |
putchar('*'); |
695 |
putchar('\t'); |
696 |
} |
697 |
|
698 |
|
699 |
static void |
700 |
oputtilde( /* output tilde (spacer) */ |
701 |
RAY *r |
702 |
) |
703 |
{ |
704 |
fputs("~\t", stdout); |
705 |
} |
706 |
|
707 |
|
708 |
static void |
709 |
puta( /* print ascii value */ |
710 |
double v |
711 |
) |
712 |
{ |
713 |
printf("%e\t", v); |
714 |
} |
715 |
|
716 |
|
717 |
static void |
718 |
putd(v) /* print binary double */ |
719 |
double v; |
720 |
{ |
721 |
fwrite((char *)&v, sizeof(v), 1, stdout); |
722 |
} |
723 |
|
724 |
|
725 |
static void |
726 |
putf(v) /* print binary float */ |
727 |
double v; |
728 |
{ |
729 |
float f = v; |
730 |
|
731 |
fwrite((char *)&f, sizeof(f), 1, stdout); |
732 |
} |