1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rfluxmtx.c,v 2.12 2014/07/28 16:30:18 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Calculate flux transfer matrix or matrices using rcontrib |
6 |
*/ |
7 |
|
8 |
#include "copyright.h" |
9 |
|
10 |
#include <ctype.h> |
11 |
#include <stdlib.h> |
12 |
#include "rtio.h" |
13 |
#include "rtmath.h" |
14 |
#include "rtprocess.h" |
15 |
#include "bsdf.h" |
16 |
#include "bsdf_m.h" |
17 |
#include "random.h" |
18 |
#include "triangulate.h" |
19 |
#include "platform.h" |
20 |
|
21 |
#ifdef getc_unlocked /* avoid horrendous overhead of flockfile */ |
22 |
#undef getc |
23 |
#define getc getc_unlocked |
24 |
#endif |
25 |
|
26 |
#ifdef _WIN32 |
27 |
#define SPECIALS " \t\"$*?" |
28 |
#define QUOTCHAR '"' |
29 |
#else |
30 |
#define SPECIALS " \t\n'\"()${}*?[];|&" |
31 |
#define QUOTCHAR '\'' |
32 |
#define ALTQUOT '"' |
33 |
#endif |
34 |
|
35 |
#define MAXRCARG 512 |
36 |
|
37 |
char *progname; /* global argv[0] */ |
38 |
|
39 |
int verbose = 0; /* verbose mode? */ |
40 |
|
41 |
char *rcarg[MAXRCARG+1] = {"rcontrib", "-fo+"}; |
42 |
int nrcargs = 2; |
43 |
|
44 |
const char overflowerr[] = "%s: too many arguments!\n"; |
45 |
|
46 |
#define CHECKARGC(n) if (nrcargs >= MAXRCARG-(n)) \ |
47 |
{ fprintf(stderr, overflowerr, progname); exit(1); } |
48 |
|
49 |
int sampcnt = 0; /* sample count (0==unset) */ |
50 |
|
51 |
char *reinhfn = "reinhartb.cal"; |
52 |
char *shirchiufn = "disk2square.cal"; |
53 |
char *kfullfn = "klems_full.cal"; |
54 |
char *khalffn = "klems_half.cal"; |
55 |
char *kquarterfn = "klems_quarter.cal"; |
56 |
|
57 |
/* string indicating parameters */ |
58 |
const char PARAMSTART[] = "@rfluxmtx"; |
59 |
|
60 |
/* surface type IDs */ |
61 |
#define ST_NONE 0 |
62 |
#define ST_POLY 1 |
63 |
#define ST_RING 2 |
64 |
#define ST_SOURCE 3 |
65 |
|
66 |
typedef struct surf_s { |
67 |
struct surf_s *next; /* next surface in list */ |
68 |
void *priv; /* private data (malloc'ed) */ |
69 |
char sname[32]; /* surface name */ |
70 |
FVECT snrm; /* surface normal */ |
71 |
double area; /* surface area / proj. solid angle */ |
72 |
short styp; /* surface type */ |
73 |
short nfargs; /* number of real arguments */ |
74 |
double farg[1]; /* real values (extends struct) */ |
75 |
} SURF; /* surface structure */ |
76 |
|
77 |
typedef struct { |
78 |
FVECT uva[2]; /* tangent axes */ |
79 |
int ntris; /* number of triangles */ |
80 |
struct ptri { |
81 |
float afrac; /* fraction of total area */ |
82 |
short vndx[3]; /* vertex indices */ |
83 |
} tri[1]; /* triangle array (extends struct) */ |
84 |
} POLYTRIS; /* triangulated polygon */ |
85 |
|
86 |
typedef struct param_s { |
87 |
char hemis[32]; /* hemispherical sampling spec. */ |
88 |
int hsiz; /* hemisphere basis size */ |
89 |
int nsurfs; /* number of surfaces */ |
90 |
SURF *slist; /* list of surfaces */ |
91 |
FVECT vup; /* up vector (zero if unset) */ |
92 |
FVECT nrm; /* average normal direction */ |
93 |
FVECT udir, vdir; /* v-up tangent axes */ |
94 |
char *outfn; /* output file name (receiver) */ |
95 |
int (*sample_basis)(struct param_s *p, int, FILE *); |
96 |
} PARAMS; /* sender/receiver parameters */ |
97 |
|
98 |
PARAMS curparams; |
99 |
char curmod[128]; |
100 |
char newparams[1024]; |
101 |
|
102 |
typedef int SURFSAMP(FVECT, SURF *, double); |
103 |
|
104 |
static SURFSAMP ssamp_bad, ssamp_poly, ssamp_ring; |
105 |
|
106 |
SURFSAMP *orig_in_surf[4] = { |
107 |
ssamp_bad, ssamp_poly, ssamp_ring, ssamp_bad |
108 |
}; |
109 |
|
110 |
/* Clear parameter set */ |
111 |
static void |
112 |
clear_params(PARAMS *p, int reset_only) |
113 |
{ |
114 |
while (p->slist != NULL) { |
115 |
SURF *sdel = p->slist; |
116 |
p->slist = sdel->next; |
117 |
if (sdel->priv != NULL) |
118 |
free(sdel->priv); |
119 |
free(sdel); |
120 |
} |
121 |
if (reset_only) { |
122 |
p->nsurfs = 0; |
123 |
memset(p->nrm, 0, sizeof(FVECT)); |
124 |
memset(p->vup, 0, sizeof(FVECT)); |
125 |
p->outfn = NULL; |
126 |
return; |
127 |
} |
128 |
memset(p, 0, sizeof(PARAMS)); |
129 |
} |
130 |
|
131 |
/* Get surface type from name */ |
132 |
static int |
133 |
surf_type(const char *otype) |
134 |
{ |
135 |
if (!strcmp(otype, "polygon")) |
136 |
return(ST_POLY); |
137 |
if (!strcmp(otype, "ring")) |
138 |
return(ST_RING); |
139 |
if (!strcmp(otype, "source")) |
140 |
return(ST_SOURCE); |
141 |
return(ST_NONE); |
142 |
} |
143 |
|
144 |
/* Add arguments to oconv command */ |
145 |
static char * |
146 |
oconv_command(int ac, char *av[]) |
147 |
{ |
148 |
static char oconvbuf[2048] = "!oconv -f "; |
149 |
char *cp = oconvbuf + 10; |
150 |
char *recv = *av++; |
151 |
|
152 |
if (ac-- <= 0) |
153 |
return(NULL); |
154 |
while (ac-- > 0) { |
155 |
strcpy(cp, *av++); |
156 |
while (*cp) cp++; |
157 |
*cp++ = ' '; |
158 |
if (cp >= oconvbuf+(sizeof(oconvbuf)-32)) { |
159 |
fputs(progname, stderr); |
160 |
fputs(": too many file arguments!\n", stderr); |
161 |
exit(1); |
162 |
} |
163 |
} |
164 |
strcpy(cp, recv); /* receiver goes last */ |
165 |
return(oconvbuf); |
166 |
} |
167 |
|
168 |
/* Check if any of the characters in str2 are found in str1 */ |
169 |
static int |
170 |
matchany(const char *str1, const char *str2) |
171 |
{ |
172 |
while (*str1) { |
173 |
const char *cp = str2; |
174 |
while (*cp) |
175 |
if (*cp++ == *str1) |
176 |
return(*str1); |
177 |
++str1; |
178 |
} |
179 |
return(0); |
180 |
} |
181 |
|
182 |
|
183 |
/* Convert a set of arguments into a command line for pipe() or system() */ |
184 |
static char * |
185 |
convert_commandline(char *cmd, const int len, char *av[]) |
186 |
{ |
187 |
int match; |
188 |
char *cp; |
189 |
|
190 |
for (cp = cmd; *av != NULL; av++) { |
191 |
const int n = strlen(*av); |
192 |
if (cp+n >= cmd+(len-3)) { |
193 |
fputs(progname, stderr); |
194 |
return(NULL); |
195 |
} |
196 |
if ((match = matchany(*av, SPECIALS))) { |
197 |
const int quote = |
198 |
#ifdef ALTQUOT |
199 |
(match == QUOTCHAR) ? ALTQUOT : |
200 |
#endif |
201 |
QUOTCHAR; |
202 |
*cp++ = quote; |
203 |
strcpy(cp, *av); |
204 |
cp += n; |
205 |
*cp++ = quote; |
206 |
} else { |
207 |
strcpy(cp, *av); |
208 |
cp += n; |
209 |
} |
210 |
*cp++ = ' '; |
211 |
} |
212 |
if (cp <= cmd) |
213 |
return(NULL); |
214 |
*--cp = '\0'; |
215 |
return(cmd); |
216 |
} |
217 |
|
218 |
/* Open a pipe to/from a command given as an argument list */ |
219 |
static FILE * |
220 |
popen_arglist(char *av[], char *mode) |
221 |
{ |
222 |
char cmd[10240]; |
223 |
|
224 |
if (!convert_commandline(cmd, sizeof(cmd), av)) { |
225 |
fputs(progname, stderr); |
226 |
fputs(": command line too long in popen_arglist()\n", stderr); |
227 |
return(NULL); |
228 |
} |
229 |
if (verbose) |
230 |
fprintf(stderr, "%s: opening pipe %s: %s\n", |
231 |
progname, (*mode=='w') ? "to" : "from", cmd); |
232 |
return(popen(cmd, mode)); |
233 |
} |
234 |
|
235 |
#ifdef _WIN32 |
236 |
/* Execute system command (Windows version) */ |
237 |
static int |
238 |
my_exec(char *av[]) |
239 |
{ |
240 |
char cmd[10240]; |
241 |
|
242 |
if (!convert_commandline(cmd, sizeof(cmd), av)) { |
243 |
fputs(progname, stderr); |
244 |
fputs(": command line too long in my_exec()\n", stderr); |
245 |
return(1); |
246 |
} |
247 |
if (verbose) |
248 |
fprintf(stderr, "%s: running: %s\n", progname, cmd); |
249 |
return(system(cmd)); |
250 |
} |
251 |
#else |
252 |
/* Execute system command in our stead (Unix version) */ |
253 |
static int |
254 |
my_exec(char *av[]) |
255 |
{ |
256 |
char *compath; |
257 |
|
258 |
if ((compath = getpath((char *)av[0], getenv("PATH"), X_OK)) == NULL) { |
259 |
fprintf(stderr, "%s: cannot locate %s\n", progname, av[0]); |
260 |
return(1); |
261 |
} |
262 |
if (verbose) { |
263 |
char cmd[4096]; |
264 |
if (!convert_commandline(cmd, sizeof(cmd), av)) |
265 |
strcpy(cmd, "COMMAND TOO LONG TO SHOW"); |
266 |
fprintf(stderr, "%s: running: %s\n", progname, cmd); |
267 |
} |
268 |
execv(compath, av); /* successful call never returns */ |
269 |
perror(compath); |
270 |
return(1); |
271 |
} |
272 |
#endif |
273 |
|
274 |
/* Get normalized direction vector from string specification */ |
275 |
static int |
276 |
get_direction(FVECT dv, const char *s) |
277 |
{ |
278 |
int sign = 1; |
279 |
int axis = 0; |
280 |
|
281 |
memset(dv, 0, sizeof(FVECT)); |
282 |
nextchar: |
283 |
switch (*s) { |
284 |
case '+': |
285 |
++s; |
286 |
goto nextchar; |
287 |
case '-': |
288 |
sign = -sign; |
289 |
++s; |
290 |
goto nextchar; |
291 |
case 'z': |
292 |
case 'Z': |
293 |
++axis; |
294 |
case 'y': |
295 |
case 'Y': |
296 |
++axis; |
297 |
case 'x': |
298 |
case 'X': |
299 |
dv[axis] = sign; |
300 |
return(!s[1] | isspace(s[1])); |
301 |
default: |
302 |
break; |
303 |
} |
304 |
#ifdef SMLFLT |
305 |
if (sscanf(s, "%f,%f,%f", &dv[0], &dv[1], &dv[2]) != 3) |
306 |
#else |
307 |
if (sscanf(s, "%lf,%lf,%lf", &dv[0], &dv[1], &dv[2]) != 3) |
308 |
#endif |
309 |
return(0); |
310 |
dv[0] *= (RREAL)sign; |
311 |
return(normalize(dv) > 0); |
312 |
} |
313 |
|
314 |
/* Parse program parameters (directives) */ |
315 |
static int |
316 |
parse_params(PARAMS *p, char *pargs) |
317 |
{ |
318 |
char *cp = pargs; |
319 |
int nparams = 0; |
320 |
int i; |
321 |
|
322 |
for ( ; ; ) |
323 |
switch (*cp++) { |
324 |
case 'h': |
325 |
if (*cp++ != '=') |
326 |
break; |
327 |
p->hsiz = 0; |
328 |
i = 0; |
329 |
while (*cp && !isspace(*cp)) { |
330 |
if (isdigit(*cp)) |
331 |
p->hsiz = 10*p->hsiz + *cp - '0'; |
332 |
p->hemis[i++] = *cp++; |
333 |
} |
334 |
if (!i) |
335 |
break; |
336 |
p->hemis[i] = '\0'; |
337 |
p->hsiz += !p->hsiz; |
338 |
++nparams; |
339 |
continue; |
340 |
case 'u': |
341 |
if (*cp++ != '=') |
342 |
break; |
343 |
if (!get_direction(p->vup, cp)) |
344 |
break; |
345 |
++nparams; |
346 |
continue; |
347 |
case 'o': |
348 |
if (*cp++ != '=') |
349 |
break; |
350 |
i = 0; |
351 |
while (*cp && !isspace(*cp++)) |
352 |
i++; |
353 |
if (!i) |
354 |
break; |
355 |
*--cp = '\0'; |
356 |
p->outfn = savqstr(cp-i); |
357 |
*cp++ = ' '; |
358 |
++nparams; |
359 |
continue; |
360 |
case ' ': |
361 |
case '\t': |
362 |
case '\r': |
363 |
case '\n': |
364 |
continue; |
365 |
case '\0': |
366 |
return(nparams); |
367 |
default: |
368 |
break; |
369 |
} |
370 |
fprintf(stderr, "%s: bad parameter string '%s'\n", progname, pargs); |
371 |
exit(1); |
372 |
return(-1); /* pro forma return */ |
373 |
} |
374 |
|
375 |
/* Add receiver arguments (directives) corresponding to the current modifier */ |
376 |
static void |
377 |
finish_receiver(void) |
378 |
{ |
379 |
char sbuf[256]; |
380 |
int uniform = 0; |
381 |
char *calfn = NULL; |
382 |
char *params = NULL; |
383 |
char *binv = NULL; |
384 |
char *binf = NULL; |
385 |
char *nbins = NULL; |
386 |
|
387 |
if (!curmod[0]) { |
388 |
fputs(progname, stderr); |
389 |
fputs(": missing receiver surface!\n", stderr); |
390 |
exit(1); |
391 |
} |
392 |
if (curparams.outfn != NULL) { /* add output file spec. */ |
393 |
CHECKARGC(2); |
394 |
rcarg[nrcargs++] = "-o"; |
395 |
rcarg[nrcargs++] = curparams.outfn; |
396 |
} |
397 |
/* check arguments */ |
398 |
if (!curparams.hemis[0]) { |
399 |
fputs(progname, stderr); |
400 |
fputs(": missing hemisphere sampling type!\n", stderr); |
401 |
exit(1); |
402 |
} |
403 |
if (normalize(curparams.nrm) == 0) { |
404 |
fputs(progname, stderr); |
405 |
fputs(": undefined normal for hemisphere sampling\n", stderr); |
406 |
exit(1); |
407 |
} |
408 |
if (normalize(curparams.vup) == 0) { |
409 |
if (fabs(curparams.nrm[2]) < .7) |
410 |
curparams.vup[2] = 1; |
411 |
else |
412 |
curparams.vup[1] = 1; |
413 |
} |
414 |
/* determine sample type/bin */ |
415 |
if (tolower(curparams.hemis[0]) == 'u' | curparams.hemis[0] == '1') { |
416 |
binv = "0"; /* uniform sampling -- one bin */ |
417 |
uniform = 1; |
418 |
} else if (tolower(curparams.hemis[0]) == 's' && |
419 |
tolower(curparams.hemis[1]) == 'c') { |
420 |
/* assign parameters */ |
421 |
if (curparams.hsiz <= 1) { |
422 |
fputs(progname, stderr); |
423 |
fputs(": missing size for Shirley-Chiu sampling!\n", stderr); |
424 |
exit(1); |
425 |
} |
426 |
calfn = shirchiufn; shirchiufn = NULL; |
427 |
sprintf(sbuf, "SCdim=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g", |
428 |
curparams.hsiz, |
429 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
430 |
curparams.vup[0], curparams.vup[1], curparams.vup[2]); |
431 |
params = savqstr(sbuf); |
432 |
binv = "scbin"; |
433 |
nbins = "SCdim*SCdim"; |
434 |
} else if ((tolower(curparams.hemis[0]) == 'r') | |
435 |
(tolower(curparams.hemis[0]) == 't')) { |
436 |
calfn = reinhfn; reinhfn = NULL; |
437 |
sprintf(sbuf, "MF=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g", |
438 |
curparams.hsiz, |
439 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
440 |
curparams.vup[0], curparams.vup[1], curparams.vup[2]); |
441 |
params = savqstr(sbuf); |
442 |
binv = "rbin"; |
443 |
nbins = "Nrbins"; |
444 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
445 |
!curparams.hemis[1] | |
446 |
(tolower(curparams.hemis[1]) == 'f') | |
447 |
(curparams.hemis[1] == '1')) { |
448 |
calfn = kfullfn; kfullfn = NULL; |
449 |
binf = "kbin"; |
450 |
nbins = "Nkbins"; |
451 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
452 |
(tolower(curparams.hemis[1]) == 'h') | |
453 |
(curparams.hemis[1] == '2')) { |
454 |
calfn = khalffn; khalffn = NULL; |
455 |
binf = "khbin"; |
456 |
nbins = "Nkhbins"; |
457 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
458 |
(tolower(curparams.hemis[1]) == 'q') | |
459 |
(curparams.hemis[1] == '4')) { |
460 |
calfn = kquarterfn; kquarterfn = NULL; |
461 |
binf = "kqbin"; |
462 |
nbins = "Nkqbins"; |
463 |
} else { |
464 |
fprintf(stderr, "%s: unrecognized hemisphere sampling: h=%s\n", |
465 |
progname, curparams.hemis); |
466 |
exit(1); |
467 |
} |
468 |
if (!uniform & (curparams.slist->styp == ST_SOURCE)) { |
469 |
SURF *sp; |
470 |
for (sp = curparams.slist; sp != NULL; sp = sp->next) |
471 |
if (fabs(sp->area - PI) > 1e-3) { |
472 |
fprintf(stderr, "%s: source '%s' must be 180-degrees\n", |
473 |
progname, sp->sname); |
474 |
exit(1); |
475 |
} |
476 |
} |
477 |
if (calfn != NULL) { /* add cal file if needed */ |
478 |
CHECKARGC(2); |
479 |
rcarg[nrcargs++] = "-f"; |
480 |
rcarg[nrcargs++] = calfn; |
481 |
} |
482 |
if (params != NULL) { /* parameters _after_ cal file */ |
483 |
CHECKARGC(2); |
484 |
rcarg[nrcargs++] = "-p"; |
485 |
rcarg[nrcargs++] = params; |
486 |
} |
487 |
if (nbins != NULL) { /* add #bins if set */ |
488 |
CHECKARGC(2); |
489 |
rcarg[nrcargs++] = "-bn"; |
490 |
rcarg[nrcargs++] = nbins; |
491 |
} |
492 |
if (binv != NULL) { |
493 |
CHECKARGC(2); /* assign bin variable */ |
494 |
rcarg[nrcargs++] = "-b"; |
495 |
rcarg[nrcargs++] = binv; |
496 |
} else if (binf != NULL) { |
497 |
CHECKARGC(2); /* assign bin function */ |
498 |
rcarg[nrcargs++] = "-b"; |
499 |
sprintf(sbuf, "%s(%g,%g,%g,%g,%g,%g)", binf, |
500 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
501 |
curparams.vup[0], curparams.vup[1], curparams.vup[2]); |
502 |
rcarg[nrcargs++] = savqstr(sbuf); |
503 |
} |
504 |
CHECKARGC(2); /* modifier argument goes last */ |
505 |
rcarg[nrcargs++] = "-m"; |
506 |
rcarg[nrcargs++] = savqstr(curmod); |
507 |
} |
508 |
|
509 |
/* Make randomly oriented tangent plane axes for given normal direction */ |
510 |
static void |
511 |
make_axes(FVECT uva[2], const FVECT nrm) |
512 |
{ |
513 |
int i; |
514 |
|
515 |
uva[1][0] = 0.5 - frandom(); |
516 |
uva[1][1] = 0.5 - frandom(); |
517 |
uva[1][2] = 0.5 - frandom(); |
518 |
for (i = 3; i--; ) |
519 |
if ((-0.6 < nrm[i]) & (nrm[i] < 0.6)) |
520 |
break; |
521 |
if (i < 0) { |
522 |
fputs(progname, stderr); |
523 |
fputs(": bad surface normal in make_axes!\n", stderr); |
524 |
exit(1); |
525 |
} |
526 |
uva[1][i] = 1.0; |
527 |
VCROSS(uva[0], uva[1], nrm); |
528 |
normalize(uva[0]); |
529 |
VCROSS(uva[1], nrm, uva[0]); |
530 |
} |
531 |
|
532 |
/* Illegal sender surfaces end up here */ |
533 |
static int |
534 |
ssamp_bad(FVECT orig, SURF *sp, double x) |
535 |
{ |
536 |
fprintf(stderr, "%s: illegal sender surface '%s'\n", |
537 |
progname, sp->sname); |
538 |
return(0); |
539 |
} |
540 |
|
541 |
/* Generate origin on ring surface from uniform random variable */ |
542 |
static int |
543 |
ssamp_ring(FVECT orig, SURF *sp, double x) |
544 |
{ |
545 |
FVECT *uva = (FVECT *)sp->priv; |
546 |
double samp2[2]; |
547 |
double uv[2]; |
548 |
int i; |
549 |
|
550 |
if (uva == NULL) { /* need tangent axes */ |
551 |
uva = (FVECT *)malloc(sizeof(FVECT)*2); |
552 |
if (uva == NULL) { |
553 |
fputs(progname, stderr); |
554 |
fputs(": out of memory in ssamp_ring!\n", stderr); |
555 |
return(0); |
556 |
} |
557 |
make_axes(uva, sp->snrm); |
558 |
sp->priv = (void *)uva; |
559 |
} |
560 |
SDmultiSamp(samp2, 2, x); |
561 |
samp2[0] = sqrt(samp2[0]*sp->area*(1./PI) + sp->farg[6]*sp->farg[6]); |
562 |
samp2[1] *= 2.*PI; |
563 |
uv[0] = samp2[0]*tcos(samp2[1]); |
564 |
uv[1] = samp2[0]*tsin(samp2[1]); |
565 |
for (i = 3; i--; ) |
566 |
orig[i] = sp->farg[i] + uv[0]*uva[0][i] + uv[1]*uva[1][i]; |
567 |
return(1); |
568 |
} |
569 |
|
570 |
/* Add triangle to polygon's list (call-back function) */ |
571 |
static int |
572 |
add_triangle(const Vert2_list *tp, int a, int b, int c) |
573 |
{ |
574 |
POLYTRIS *ptp = (POLYTRIS *)tp->p; |
575 |
struct ptri *trip = ptp->tri + ptp->ntris++; |
576 |
|
577 |
trip->vndx[0] = a; |
578 |
trip->vndx[1] = b; |
579 |
trip->vndx[2] = c; |
580 |
return(1); |
581 |
} |
582 |
|
583 |
/* Generate origin on polygon surface from uniform random variable */ |
584 |
static int |
585 |
ssamp_poly(FVECT orig, SURF *sp, double x) |
586 |
{ |
587 |
POLYTRIS *ptp = (POLYTRIS *)sp->priv; |
588 |
double samp2[2]; |
589 |
double *v0, *v1, *v2; |
590 |
int i; |
591 |
|
592 |
if (ptp == NULL) { /* need to triangulate */ |
593 |
ptp = (POLYTRIS *)malloc(sizeof(POLYTRIS) + |
594 |
sizeof(struct ptri)*(sp->nfargs/3 - 3)); |
595 |
if (ptp == NULL) |
596 |
goto memerr; |
597 |
if (sp->nfargs == 3) { /* simple case */ |
598 |
ptp->ntris = 1; |
599 |
ptp->tri[0].vndx[0] = 0; |
600 |
ptp->tri[0].vndx[1] = 1; |
601 |
ptp->tri[0].vndx[2] = 2; |
602 |
ptp->tri[0].afrac = 1; |
603 |
} else { |
604 |
Vert2_list *v2l = polyAlloc(sp->nfargs/3); |
605 |
if (v2l == NULL) |
606 |
goto memerr; |
607 |
make_axes(ptp->uva, sp->snrm); |
608 |
for (i = v2l->nv; i--; ) { |
609 |
v2l->v[i].mX = DOT(sp->farg+3*i, ptp->uva[0]); |
610 |
v2l->v[i].mY = DOT(sp->farg+3*i, ptp->uva[1]); |
611 |
} |
612 |
ptp->ntris = 0; |
613 |
v2l->p = (void *)ptp; |
614 |
if (!polyTriangulate(v2l, add_triangle)) { |
615 |
fprintf(stderr, |
616 |
"%s: cannot triangulate polygon '%s'\n", |
617 |
progname, sp->sname); |
618 |
return(0); |
619 |
} |
620 |
for (i = ptp->ntris; i--; ) { |
621 |
int a = ptp->tri[i].vndx[0]; |
622 |
int b = ptp->tri[i].vndx[1]; |
623 |
int c = ptp->tri[i].vndx[2]; |
624 |
ptp->tri[i].afrac = |
625 |
(v2l->v[a].mX*v2l->v[b].mY - |
626 |
v2l->v[b].mX*v2l->v[a].mY + |
627 |
v2l->v[b].mX*v2l->v[c].mY - |
628 |
v2l->v[c].mX*v2l->v[b].mY + |
629 |
v2l->v[c].mX*v2l->v[a].mY - |
630 |
v2l->v[a].mX*v2l->v[c].mY) / |
631 |
(2.*sp->area); |
632 |
} |
633 |
polyFree(v2l); |
634 |
} |
635 |
sp->priv = (void *)ptp; |
636 |
} |
637 |
/* pick triangle by partial area */ |
638 |
for (i = 0; i < ptp->ntris && x > ptp->tri[i].afrac; i++) |
639 |
x -= ptp->tri[i].afrac; |
640 |
SDmultiSamp(samp2, 2, x/ptp->tri[i].afrac); |
641 |
samp2[0] *= samp2[1] = sqrt(samp2[1]); |
642 |
samp2[1] = 1. - samp2[1]; |
643 |
v0 = sp->farg + 3*ptp->tri[i].vndx[0]; |
644 |
v1 = sp->farg + 3*ptp->tri[i].vndx[1]; |
645 |
v2 = sp->farg + 3*ptp->tri[i].vndx[2]; |
646 |
for (i = 3; i--; ) |
647 |
orig[i] = v0[i] + samp2[0]*(v1[i] - v0[i]) |
648 |
+ samp2[1]*(v2[i] - v0[i]) ; |
649 |
return(1); |
650 |
memerr: |
651 |
fputs(progname, stderr); |
652 |
fputs(": out of memory in ssamp_poly!\n", stderr); |
653 |
return(0); |
654 |
} |
655 |
|
656 |
/* Compute sample origin based on projected areas of sender subsurfaces */ |
657 |
static int |
658 |
sample_origin(PARAMS *p, FVECT orig, const FVECT rdir, double x) |
659 |
{ |
660 |
static double *projsa; |
661 |
static int nall; |
662 |
double tarea = 0; |
663 |
int i; |
664 |
SURF *sp; |
665 |
/* special case for lone surface */ |
666 |
if (p->nsurfs == 1) { |
667 |
sp = p->slist; |
668 |
if (DOT(sp->snrm, rdir) >= -FTINY) { |
669 |
fprintf(stderr, |
670 |
"%s: internal - sample behind sender '%s'\n", |
671 |
progname, sp->sname); |
672 |
return(0); |
673 |
} |
674 |
return((*orig_in_surf[sp->styp])(orig, sp, x)); |
675 |
} |
676 |
if (p->nsurfs > nall) { /* (re)allocate surface area cache */ |
677 |
if (projsa) free(projsa); |
678 |
projsa = (double *)malloc(sizeof(double)*p->nsurfs); |
679 |
if (!projsa) return(0); |
680 |
nall = p->nsurfs; |
681 |
} |
682 |
/* compute projected areas */ |
683 |
for (i = 0, sp = p->slist; sp != NULL; i++, sp = sp->next) { |
684 |
projsa[i] = -DOT(sp->snrm, rdir) * sp->area; |
685 |
tarea += projsa[i] *= (double)(projsa[i] > FTINY); |
686 |
} |
687 |
if (tarea <= FTINY) { /* wrong side of sender? */ |
688 |
fputs(progname, stderr); |
689 |
fputs(": internal - sample behind all sender elements!\n", |
690 |
stderr); |
691 |
return(0); |
692 |
} |
693 |
tarea *= x; /* get surface from list */ |
694 |
for (i = 0, sp = p->slist; tarea > projsa[i]; sp = sp->next) |
695 |
tarea -= projsa[i++]; |
696 |
return((*orig_in_surf[sp->styp])(orig, sp, tarea/projsa[i])); |
697 |
} |
698 |
|
699 |
/* Uniform sample generator */ |
700 |
static int |
701 |
sample_uniform(PARAMS *p, int b, FILE *fp) |
702 |
{ |
703 |
int n = sampcnt; |
704 |
double samp3[3]; |
705 |
double duvw[3]; |
706 |
FVECT orig_dir[2]; |
707 |
int i; |
708 |
|
709 |
if (fp == NULL) /* just requesting number of bins? */ |
710 |
return(1); |
711 |
|
712 |
while (n--) { /* stratified hemisphere sampling */ |
713 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
714 |
SDsquare2disk(duvw, samp3[1], samp3[2]); |
715 |
duvw[2] = -sqrt(1. - duvw[0]*duvw[0] - duvw[1]*duvw[1]); |
716 |
for (i = 3; i--; ) |
717 |
orig_dir[1][i] = duvw[0]*p->udir[i] + |
718 |
duvw[1]*p->vdir[i] + |
719 |
duvw[2]*p->nrm[i] ; |
720 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0])) |
721 |
return(0); |
722 |
if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2) |
723 |
return(0); |
724 |
} |
725 |
return(1); |
726 |
} |
727 |
|
728 |
/* Shirly-Chiu sample generator */ |
729 |
static int |
730 |
sample_shirchiu(PARAMS *p, int b, FILE *fp) |
731 |
{ |
732 |
int n = sampcnt; |
733 |
double samp3[3]; |
734 |
double duvw[3]; |
735 |
FVECT orig_dir[2]; |
736 |
int i; |
737 |
|
738 |
if (fp == NULL) /* just requesting number of bins? */ |
739 |
return(p->hsiz*p->hsiz); |
740 |
|
741 |
while (n--) { /* stratified sampling */ |
742 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
743 |
SDsquare2disk(duvw, (b/p->hsiz + samp3[1])/curparams.hsiz, |
744 |
(b%p->hsiz + samp3[2])/curparams.hsiz); |
745 |
duvw[2] = sqrt(1. - duvw[0]*duvw[0] - duvw[1]*duvw[1]); |
746 |
for (i = 3; i--; ) |
747 |
orig_dir[1][i] = -duvw[0]*p->udir[i] - |
748 |
duvw[1]*p->vdir[i] - |
749 |
duvw[2]*p->nrm[i] ; |
750 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0])) |
751 |
return(0); |
752 |
if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2) |
753 |
return(0); |
754 |
} |
755 |
return(1); |
756 |
} |
757 |
|
758 |
/* Reinhart/Tregenza sample generator */ |
759 |
static int |
760 |
sample_reinhart(PARAMS *p, int b, FILE *fp) |
761 |
{ |
762 |
#define T_NALT 7 |
763 |
static const int tnaz[T_NALT] = {30, 30, 24, 24, 18, 12, 6}; |
764 |
const int RowMax = T_NALT*p->hsiz + 1; |
765 |
const double RAH = (.5*PI)/(RowMax-.5); |
766 |
#define rnaz(r) (r >= RowMax-1 ? 1 : p->hsiz*tnaz[r/p->hsiz]) |
767 |
int n = sampcnt; |
768 |
int row, col; |
769 |
double samp3[3]; |
770 |
double alt, azi; |
771 |
double duvw[3]; |
772 |
FVECT orig_dir[2]; |
773 |
int i; |
774 |
|
775 |
if (fp == NULL) { /* just requesting number of bins? */ |
776 |
n = 0; |
777 |
for (row = RowMax; row--; ) n += rnaz(row); |
778 |
return(n); |
779 |
} |
780 |
row = 0; /* identify row & column */ |
781 |
col = b; |
782 |
while (col >= rnaz(row)) { |
783 |
col -= rnaz(row); |
784 |
++row; |
785 |
} |
786 |
while (n--) { /* stratified sampling */ |
787 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
788 |
alt = (row+samp3[1])*RAH; |
789 |
azi = (2.*PI)*(col+samp3[2]-.5)/rnaz(row); |
790 |
duvw[2] = cos(alt); /* measured from horizon */ |
791 |
duvw[0] = tcos(azi)*duvw[2]; |
792 |
duvw[1] = tsin(azi)*duvw[2]; |
793 |
duvw[2] = sqrt(1. - duvw[2]*duvw[2]); |
794 |
for (i = 3; i--; ) |
795 |
orig_dir[1][i] = -duvw[0]*p->udir[i] - |
796 |
duvw[1]*p->vdir[i] - |
797 |
duvw[2]*p->nrm[i] ; |
798 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0])) |
799 |
return(0); |
800 |
if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2) |
801 |
return(0); |
802 |
} |
803 |
return(1); |
804 |
#undef rnaz |
805 |
#undef T_NALT |
806 |
} |
807 |
|
808 |
/* Klems sample generator */ |
809 |
static int |
810 |
sample_klems(PARAMS *p, int b, FILE *fp) |
811 |
{ |
812 |
static const char bname[4][20] = { |
813 |
"LBNL/Klems Full", |
814 |
"LBNL/Klems Half", |
815 |
"INTERNAL ERROR", |
816 |
"LBNL/Klems Quarter" |
817 |
}; |
818 |
static ANGLE_BASIS *kbasis[4]; |
819 |
const int bi = p->hemis[1] - '1'; |
820 |
int n = sampcnt; |
821 |
double samp2[2]; |
822 |
double duvw[3]; |
823 |
FVECT orig_dir[2]; |
824 |
int i; |
825 |
|
826 |
if (!kbasis[bi]) { /* need to get basis, first */ |
827 |
for (i = 4; i--; ) |
828 |
if (!strcasecmp(abase_list[i].name, bname[bi])) { |
829 |
kbasis[bi] = &abase_list[i]; |
830 |
break; |
831 |
} |
832 |
if (i < 0) { |
833 |
fprintf(stderr, "%s: unknown hemisphere basis '%s'\n", |
834 |
progname, bname[bi]); |
835 |
return(0); |
836 |
} |
837 |
} |
838 |
if (fp == NULL) /* just requesting number of bins? */ |
839 |
return(kbasis[bi]->nangles); |
840 |
|
841 |
while (n--) { /* stratified sampling */ |
842 |
SDmultiSamp(samp2, 2, (n+frandom())/sampcnt); |
843 |
if (!bo_getvec(duvw, b+samp2[1], kbasis[bi])) |
844 |
return(0); |
845 |
for (i = 3; i--; ) |
846 |
orig_dir[1][i] = duvw[0]*p->udir[i] + |
847 |
duvw[1]*p->vdir[i] + |
848 |
duvw[2]*p->nrm[i] ; |
849 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp2[0])) |
850 |
return(0); |
851 |
if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2) |
852 |
return(0); |
853 |
} |
854 |
return(1); |
855 |
} |
856 |
|
857 |
/* Prepare hemisphere basis sampler that will send rays to rcontrib */ |
858 |
static int |
859 |
prepare_sampler(void) |
860 |
{ |
861 |
if (curparams.slist == NULL) { /* missing sample surface! */ |
862 |
fputs(progname, stderr); |
863 |
fputs(": no sender surface!\n", stderr); |
864 |
return(-1); |
865 |
} |
866 |
if (curparams.outfn != NULL) /* misplaced output file spec. */ |
867 |
fprintf(stderr, "%s: warning - ignoring output file in sender ('%s')\n", |
868 |
progname, curparams.outfn); |
869 |
/* check/set basis hemisphere */ |
870 |
if (!curparams.hemis[0]) { |
871 |
fputs(progname, stderr); |
872 |
fputs(": missing sender sampling type!\n", stderr); |
873 |
return(-1); |
874 |
} |
875 |
if (normalize(curparams.nrm) == 0) { |
876 |
fputs(progname, stderr); |
877 |
fputs(": undefined normal for sender sampling\n", stderr); |
878 |
return(-1); |
879 |
} |
880 |
if (normalize(curparams.vup) == 0) { |
881 |
if (fabs(curparams.nrm[2]) < .7) |
882 |
curparams.vup[2] = 1; |
883 |
else |
884 |
curparams.vup[1] = 1; |
885 |
} |
886 |
VCROSS(curparams.udir, curparams.vup, curparams.nrm); |
887 |
if (normalize(curparams.udir) == 0) { |
888 |
fputs(progname, stderr); |
889 |
fputs(": up vector coincides with sender normal\n", stderr); |
890 |
return(-1); |
891 |
} |
892 |
VCROSS(curparams.vdir, curparams.nrm, curparams.udir); |
893 |
if (tolower(curparams.hemis[0]) == 'u' | curparams.hemis[0] == '1') |
894 |
curparams.sample_basis = sample_uniform; |
895 |
else if (tolower(curparams.hemis[0]) == 's' && |
896 |
tolower(curparams.hemis[1]) == 'c') |
897 |
curparams.sample_basis = sample_shirchiu; |
898 |
else if ((tolower(curparams.hemis[0]) == 'r') | |
899 |
(tolower(curparams.hemis[0]) == 't')) |
900 |
curparams.sample_basis = sample_reinhart; |
901 |
else if (tolower(curparams.hemis[0]) == 'k') { |
902 |
switch (curparams.hemis[1]) { |
903 |
case '1': |
904 |
case '2': |
905 |
case '4': |
906 |
break; |
907 |
case 'f': |
908 |
case 'F': |
909 |
case '\0': |
910 |
curparams.hemis[1] = '1'; |
911 |
break; |
912 |
case 'h': |
913 |
case 'H': |
914 |
curparams.hemis[1] = '2'; |
915 |
break; |
916 |
case 'q': |
917 |
case 'Q': |
918 |
curparams.hemis[1] = '4'; |
919 |
break; |
920 |
default: |
921 |
goto unrecognized; |
922 |
} |
923 |
curparams.hemis[2] = '\0'; |
924 |
curparams.sample_basis = sample_klems; |
925 |
} else |
926 |
goto unrecognized; |
927 |
/* return number of bins */ |
928 |
return((*curparams.sample_basis)(&curparams,0,NULL)); |
929 |
unrecognized: |
930 |
fprintf(stderr, "%s: unrecognized sender sampling: h=%s\n", |
931 |
progname, curparams.hemis); |
932 |
return(-1); |
933 |
} |
934 |
|
935 |
/* Compute normal and area for polygon */ |
936 |
static int |
937 |
finish_polygon(SURF *p) |
938 |
{ |
939 |
const int nv = p->nfargs / 3; |
940 |
FVECT e1, e2, vc; |
941 |
int i; |
942 |
|
943 |
memset(p->snrm, 0, sizeof(FVECT)); |
944 |
VSUB(e1, p->farg+3, p->farg); |
945 |
for (i = 2; i < nv; i++) { |
946 |
VSUB(e2, p->farg+3*i, p->farg); |
947 |
VCROSS(vc, e1, e2); |
948 |
p->snrm[0] += vc[0]; |
949 |
p->snrm[1] += vc[1]; |
950 |
p->snrm[2] += vc[2]; |
951 |
VCOPY(e1, e2); |
952 |
} |
953 |
p->area = normalize(p->snrm)*0.5; |
954 |
return(p->area > FTINY); |
955 |
} |
956 |
|
957 |
/* Add a surface to our current parameters */ |
958 |
static void |
959 |
add_surface(int st, const char *oname, FILE *fp) |
960 |
{ |
961 |
SURF *snew; |
962 |
int n; |
963 |
/* get floating-point arguments */ |
964 |
if (!fscanf(fp, "%d", &n)) return; |
965 |
while (n-- > 0) fscanf(fp, "%*s"); |
966 |
if (!fscanf(fp, "%d", &n)) return; |
967 |
while (n-- > 0) fscanf(fp, "%*d"); |
968 |
if (!fscanf(fp, "%d", &n) || n <= 0) return; |
969 |
snew = (SURF *)malloc(sizeof(SURF) + sizeof(double)*(n-1)); |
970 |
if (snew == NULL) { |
971 |
fputs(progname, stderr); |
972 |
fputs(": out of memory!\n", stderr); |
973 |
exit(1); |
974 |
} |
975 |
strncpy(snew->sname, oname, sizeof(snew->sname)-1); |
976 |
snew->sname[sizeof(snew->sname)-1] = '\0'; |
977 |
snew->styp = st; |
978 |
snew->priv = NULL; |
979 |
snew->nfargs = n; |
980 |
for (n = 0; n < snew->nfargs; n++) |
981 |
if (fscanf(fp, "%lf", &snew->farg[n]) != 1) { |
982 |
fprintf(stderr, "%s: error reading arguments for '%s'\n", |
983 |
progname, oname); |
984 |
exit(1); |
985 |
} |
986 |
switch (st) { |
987 |
case ST_RING: |
988 |
if (snew->nfargs != 8) |
989 |
goto badcount; |
990 |
VCOPY(snew->snrm, snew->farg+3); |
991 |
if (normalize(snew->snrm) == 0) |
992 |
goto badnorm; |
993 |
if (snew->farg[7] < snew->farg[6]) { |
994 |
double t = snew->farg[7]; |
995 |
snew->farg[7] = snew->farg[6]; |
996 |
snew->farg[6] = t; |
997 |
} |
998 |
snew->area = PI*(snew->farg[7]*snew->farg[7] - |
999 |
snew->farg[6]*snew->farg[6]); |
1000 |
break; |
1001 |
case ST_POLY: |
1002 |
if (snew->nfargs < 9 || snew->nfargs % 3) |
1003 |
goto badcount; |
1004 |
finish_polygon(snew); |
1005 |
break; |
1006 |
case ST_SOURCE: |
1007 |
if (snew->nfargs != 4) |
1008 |
goto badcount; |
1009 |
for (n = 3; n--; ) /* need to reverse "normal" */ |
1010 |
snew->snrm[n] = -snew->farg[n]; |
1011 |
if (normalize(snew->snrm) == 0) |
1012 |
goto badnorm; |
1013 |
snew->area = sin((PI/180./2.)*snew->farg[3]); |
1014 |
snew->area *= PI*snew->area; |
1015 |
break; |
1016 |
} |
1017 |
if (snew->area <= FTINY) { |
1018 |
fprintf(stderr, "%s: warning - zero area for surface '%s'\n", |
1019 |
progname, oname); |
1020 |
free(snew); |
1021 |
return; |
1022 |
} |
1023 |
VSUM(curparams.nrm, curparams.nrm, snew->snrm, snew->area); |
1024 |
snew->next = curparams.slist; |
1025 |
curparams.slist = snew; |
1026 |
curparams.nsurfs++; |
1027 |
return; |
1028 |
badcount: |
1029 |
fprintf(stderr, "%s: bad argument count for surface element '%s'\n", |
1030 |
progname, oname); |
1031 |
exit(1); |
1032 |
badnorm: |
1033 |
fprintf(stderr, "%s: bad orientation for surface element '%s'\n", |
1034 |
progname, oname); |
1035 |
exit(1); |
1036 |
} |
1037 |
|
1038 |
/* Parse a receiver object (look for modifiers to add to rcontrib command) */ |
1039 |
static int |
1040 |
add_recv_object(FILE *fp) |
1041 |
{ |
1042 |
int st; |
1043 |
char thismod[128], otype[32], oname[128]; |
1044 |
int n; |
1045 |
|
1046 |
if (fscanf(fp, "%s %s %s", thismod, otype, oname) != 3) |
1047 |
return(0); /* must have hit EOF! */ |
1048 |
if (!strcmp(otype, "alias")) { |
1049 |
fscanf(fp, "%*s"); /* skip alias */ |
1050 |
return(0); |
1051 |
} |
1052 |
/* is it a new receiver? */ |
1053 |
if ((st = surf_type(otype)) != ST_NONE) { |
1054 |
if (curparams.slist != NULL && (st == ST_SOURCE) ^ |
1055 |
(curparams.slist->styp == ST_SOURCE)) { |
1056 |
fputs(progname, stderr); |
1057 |
fputs(": cannot mix source/non-source receivers!\n", stderr); |
1058 |
return(-1); |
1059 |
} |
1060 |
if (strcmp(thismod, curmod)) { |
1061 |
if (curmod[0]) { /* output last receiver? */ |
1062 |
finish_receiver(); |
1063 |
clear_params(&curparams, 1); |
1064 |
} |
1065 |
parse_params(&curparams, newparams); |
1066 |
newparams[0] = '\0'; |
1067 |
strcpy(curmod, thismod); |
1068 |
} |
1069 |
add_surface(st, oname, fp); /* read & store surface */ |
1070 |
return(1); |
1071 |
} |
1072 |
/* else skip arguments */ |
1073 |
if (!fscanf(fp, "%d", &n)) return(0); |
1074 |
while (n-- > 0) fscanf(fp, "%*s"); |
1075 |
if (!fscanf(fp, "%d", &n)) return(0); |
1076 |
while (n-- > 0) fscanf(fp, "%*d"); |
1077 |
if (!fscanf(fp, "%d", &n)) return(0); |
1078 |
while (n-- > 0) fscanf(fp, "%*f"); |
1079 |
return(0); |
1080 |
} |
1081 |
|
1082 |
/* Parse a sender object */ |
1083 |
static int |
1084 |
add_send_object(FILE *fp) |
1085 |
{ |
1086 |
int st; |
1087 |
char otype[32], oname[128]; |
1088 |
int n; |
1089 |
|
1090 |
if (fscanf(fp, "%*s %s %s", otype, oname) != 2) |
1091 |
return(0); /* must have hit EOF! */ |
1092 |
if (!strcmp(otype, "alias")) { |
1093 |
fscanf(fp, "%*s"); /* skip alias */ |
1094 |
return(0); |
1095 |
} |
1096 |
/* is it a new surface? */ |
1097 |
if ((st = surf_type(otype)) != ST_NONE) { |
1098 |
if (st == ST_SOURCE) { |
1099 |
fputs(progname, stderr); |
1100 |
fputs(": cannot use source as a sender!\n", stderr); |
1101 |
return(-1); |
1102 |
} |
1103 |
parse_params(&curparams, newparams); |
1104 |
newparams[0] = '\0'; |
1105 |
add_surface(st, oname, fp); /* read & store surface */ |
1106 |
return(0); |
1107 |
} |
1108 |
/* else skip arguments */ |
1109 |
if (!fscanf(fp, "%d", &n)) return(0); |
1110 |
while (n-- > 0) fscanf(fp, "%*s"); |
1111 |
if (!fscanf(fp, "%d", &n)) return(0); |
1112 |
while (n-- > 0) fscanf(fp, "%*d"); |
1113 |
if (!fscanf(fp, "%d", &n)) return(0); |
1114 |
while (n-- > 0) fscanf(fp, "%*f"); |
1115 |
return(0); |
1116 |
} |
1117 |
|
1118 |
/* Load a Radiance scene using the given callback function for objects */ |
1119 |
static int |
1120 |
load_scene(const char *inspec, int (*ocb)(FILE *)) |
1121 |
{ |
1122 |
int rv = 0; |
1123 |
char inpbuf[1024]; |
1124 |
FILE *fp; |
1125 |
int c; |
1126 |
|
1127 |
if (*inspec == '!') |
1128 |
fp = popen(inspec+1, "r"); |
1129 |
else |
1130 |
fp = fopen(inspec, "r"); |
1131 |
if (fp == NULL) { |
1132 |
fprintf(stderr, "%s: cannot load '%s'\n", progname, inspec); |
1133 |
return(-1); |
1134 |
} |
1135 |
while ((c = getc(fp)) != EOF) { /* load receiver data */ |
1136 |
if (isspace(c)) /* skip leading white space */ |
1137 |
continue; |
1138 |
if (c == '!') { /* read from a new command */ |
1139 |
inpbuf[0] = c; |
1140 |
if (fgetline(inpbuf+1, sizeof(inpbuf)-1, fp) != NULL) { |
1141 |
if ((c = load_scene(inpbuf, ocb)) < 0) |
1142 |
return(c); |
1143 |
rv += c; |
1144 |
} |
1145 |
continue; |
1146 |
} |
1147 |
if (c == '#') { /* parameters/comment */ |
1148 |
if ((c = getc(fp)) == EOF || ungetc(c,fp) == EOF) |
1149 |
break; |
1150 |
if (!isspace(c) && fscanf(fp, "%s", inpbuf) == 1 && |
1151 |
!strcmp(inpbuf, PARAMSTART)) { |
1152 |
if (fgets(inpbuf, sizeof(inpbuf), fp) != NULL) |
1153 |
strcat(newparams, inpbuf); |
1154 |
continue; |
1155 |
} |
1156 |
while ((c = getc(fp)) != EOF && c != '\n') |
1157 |
; /* else skipping comment */ |
1158 |
continue; |
1159 |
} |
1160 |
ungetc(c, fp); /* else check object for receiver */ |
1161 |
c = (*ocb)(fp); |
1162 |
if (c < 0) |
1163 |
return(c); |
1164 |
rv += c; |
1165 |
} |
1166 |
/* close our input stream */ |
1167 |
c = (*inspec == '!') ? pclose(fp) : fclose(fp); |
1168 |
if (c != 0) { |
1169 |
fprintf(stderr, "%s: error loading '%s'\n", progname, inspec); |
1170 |
return(-1); |
1171 |
} |
1172 |
return(rv); |
1173 |
} |
1174 |
|
1175 |
/* Get command arguments and run program */ |
1176 |
int |
1177 |
main(int argc, char *argv[]) |
1178 |
{ |
1179 |
char fmtopt[6] = "-faa"; /* default output is ASCII */ |
1180 |
char *xrs=NULL, *yrs=NULL, *ldopt=NULL; |
1181 |
char *iropt = NULL; |
1182 |
char *sendfn; |
1183 |
char sampcntbuf[32], nsbinbuf[32]; |
1184 |
FILE *rcfp; |
1185 |
int nsbins; |
1186 |
int a, i; |
1187 |
/* screen rcontrib options */ |
1188 |
progname = argv[0]; |
1189 |
for (a = 1; a < argc-2 && argv[a][0] == '-'; a++) { |
1190 |
int na = 1; /* !! Keep consistent !! */ |
1191 |
switch (argv[a][1]) { |
1192 |
case 'v': /* verbose mode */ |
1193 |
verbose = !verbose; |
1194 |
na = 0; |
1195 |
continue; |
1196 |
case 'f': /* special case for -fo, -ff, etc. */ |
1197 |
switch (argv[a][2]) { |
1198 |
case '\0': /* cal file */ |
1199 |
goto userr; |
1200 |
case 'o': /* force output */ |
1201 |
goto userr; |
1202 |
case 'a': /* output format */ |
1203 |
case 'f': |
1204 |
case 'd': |
1205 |
case 'c': |
1206 |
if (!(fmtopt[3] = argv[a][3])) |
1207 |
fmtopt[3] = argv[a][2]; |
1208 |
fmtopt[2] = argv[a][2]; |
1209 |
na = 0; |
1210 |
continue; /* will pass later */ |
1211 |
default: |
1212 |
goto userr; |
1213 |
} |
1214 |
break; |
1215 |
case 'x': /* x-resolution */ |
1216 |
xrs = argv[++a]; |
1217 |
na = 0; |
1218 |
continue; |
1219 |
case 'y': /* y-resolution */ |
1220 |
yrs = argv[++a]; |
1221 |
na = 0; |
1222 |
continue; |
1223 |
case 'c': /* number of samples */ |
1224 |
sampcnt = atoi(argv[++a]); |
1225 |
if (sampcnt <= 0) |
1226 |
goto userr; |
1227 |
na = 0; /* we re-add this later */ |
1228 |
continue; |
1229 |
case 'I': /* only for pass-through mode */ |
1230 |
case 'i': |
1231 |
iropt = argv[a]; |
1232 |
na = 0; |
1233 |
continue; |
1234 |
case 'V': /* options without arguments */ |
1235 |
case 'w': |
1236 |
case 'u': |
1237 |
case 'h': |
1238 |
case 'r': |
1239 |
break; |
1240 |
case 'n': /* options with 1 argument */ |
1241 |
case 's': |
1242 |
case 'o': |
1243 |
na = 2; |
1244 |
break; |
1245 |
case 'b': /* special case */ |
1246 |
if (argv[a][2] != 'v') goto userr; |
1247 |
break; |
1248 |
case 'l': /* special case */ |
1249 |
if (argv[a][2] == 'd') { |
1250 |
ldopt = argv[a]; |
1251 |
na = 0; |
1252 |
continue; |
1253 |
} |
1254 |
na = 2; |
1255 |
break; |
1256 |
case 'd': /* special case */ |
1257 |
if (argv[a][2] != 'v') na = 2; |
1258 |
break; |
1259 |
case 'a': /* special case */ |
1260 |
na = (argv[a][2] == 'v') ? 4 : 2; |
1261 |
break; |
1262 |
case 'm': /* special case */ |
1263 |
if (!argv[a][2]) goto userr; |
1264 |
na = (argv[a][2] == 'e') | (argv[a][2] == 'a') ? 4 : 2; |
1265 |
break; |
1266 |
case '\0': /* pass-through mode */ |
1267 |
goto done_opts; |
1268 |
default: /* anything else is verbotten */ |
1269 |
goto userr; |
1270 |
} |
1271 |
if (na <= 0) continue; |
1272 |
CHECKARGC(na); /* pass on option */ |
1273 |
rcarg[nrcargs++] = argv[a]; |
1274 |
while (--na) /* + arguments if any */ |
1275 |
rcarg[nrcargs++] = argv[++a]; |
1276 |
} |
1277 |
done_opts: |
1278 |
if (a > argc-2) |
1279 |
goto userr; /* check at end of options */ |
1280 |
sendfn = argv[a++]; /* assign sender & receiver inputs */ |
1281 |
if (sendfn[0] == '-') { /* user wants pass-through mode? */ |
1282 |
if (sendfn[1]) goto userr; |
1283 |
sendfn = NULL; |
1284 |
if (iropt) { |
1285 |
CHECKARGC(1); |
1286 |
rcarg[nrcargs++] = iropt; |
1287 |
} |
1288 |
if (xrs) { |
1289 |
CHECKARGC(2); |
1290 |
rcarg[nrcargs++] = "-x"; |
1291 |
rcarg[nrcargs++] = xrs; |
1292 |
} |
1293 |
if (yrs) { |
1294 |
CHECKARGC(2); |
1295 |
rcarg[nrcargs++] = "-y"; |
1296 |
rcarg[nrcargs++] = yrs; |
1297 |
} |
1298 |
if (ldopt) { |
1299 |
CHECKARGC(1); |
1300 |
rcarg[nrcargs++] = ldopt; |
1301 |
} |
1302 |
if (sampcnt <= 0) sampcnt = 1; |
1303 |
} else { /* else in sampling mode */ |
1304 |
if (iropt) { |
1305 |
fputs(progname, stderr); |
1306 |
fputs(": -i, -I supported for pass-through only\n", stderr); |
1307 |
return(1); |
1308 |
} |
1309 |
fmtopt[2] = (sizeof(RREAL)==sizeof(double)) ? 'd' : 'f'; |
1310 |
if (sampcnt <= 0) sampcnt = 10000; |
1311 |
} |
1312 |
sprintf(sampcntbuf, "%d", sampcnt); |
1313 |
CHECKARGC(3); /* add our format & sample count */ |
1314 |
rcarg[nrcargs++] = fmtopt; |
1315 |
rcarg[nrcargs++] = "-c"; |
1316 |
rcarg[nrcargs++] = sampcntbuf; |
1317 |
/* add receiver arguments to rcontrib */ |
1318 |
if (load_scene(argv[a], add_recv_object) < 0) |
1319 |
return(1); |
1320 |
finish_receiver(); |
1321 |
if (sendfn == NULL) { /* pass-through mode? */ |
1322 |
CHECKARGC(1); /* add octree */ |
1323 |
rcarg[nrcargs++] = oconv_command(argc-a, argv+a); |
1324 |
rcarg[nrcargs] = NULL; |
1325 |
return(my_exec(rcarg)); /* rcontrib does everything */ |
1326 |
} |
1327 |
clear_params(&curparams, 0); /* else load sender surface & params */ |
1328 |
if (load_scene(sendfn, add_send_object) < 0) |
1329 |
return(1); |
1330 |
if ((nsbins = prepare_sampler()) <= 0) |
1331 |
return(1); |
1332 |
CHECKARGC(3); /* add row count and octree */ |
1333 |
rcarg[nrcargs++] = "-y"; |
1334 |
sprintf(nsbinbuf, "%d", nsbins); |
1335 |
rcarg[nrcargs++] = nsbinbuf; |
1336 |
rcarg[nrcargs++] = oconv_command(argc-a, argv+a); |
1337 |
rcarg[nrcargs] = NULL; |
1338 |
/* open pipe to rcontrib process */ |
1339 |
if ((rcfp = popen_arglist(rcarg, "w")) == NULL) |
1340 |
return(1); |
1341 |
SET_FILE_BINARY(rcfp); |
1342 |
#ifdef getc_unlocked |
1343 |
flockfile(rcfp); |
1344 |
#endif |
1345 |
if (verbose) { |
1346 |
fprintf(stderr, "%s: sampling %d directions", progname, nsbins); |
1347 |
if (curparams.nsurfs > 1) |
1348 |
fprintf(stderr, " (%d elements)\n", curparams.nsurfs); |
1349 |
else |
1350 |
fputc('\n', stderr); |
1351 |
} |
1352 |
for (i = 0; i < nsbins; i++) /* send rcontrib ray samples */ |
1353 |
if (!(*curparams.sample_basis)(&curparams, i, rcfp)) |
1354 |
return(1); |
1355 |
return(pclose(rcfp) == 0); /* all finished! */ |
1356 |
userr: |
1357 |
if (a < argc-2) |
1358 |
fprintf(stderr, "%s: unsupported option '%s'", progname, argv[a]); |
1359 |
fprintf(stderr, "Usage: %s [-v][rcontrib options] sender.rad receiver.rad [-i system.oct] [system.rad ..]\n", |
1360 |
progname); |
1361 |
return(1); |
1362 |
} |