1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rfluxmtx.c,v 2.31 2015/09/13 21:09:20 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 (< 0 no warnings) */ |
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 sign; /* '-' for axis reversal */ |
88 |
char hemis[31]; /* hemispherical sampling spec. */ |
89 |
int hsiz; /* hemisphere basis size */ |
90 |
int nsurfs; /* number of surfaces */ |
91 |
SURF *slist; /* list of surfaces */ |
92 |
FVECT vup; /* up vector (zero if unset) */ |
93 |
FVECT nrm; /* average normal direction */ |
94 |
FVECT udir, vdir; /* tangent axes */ |
95 |
char *outfn; /* output file name (receiver) */ |
96 |
int (*sample_basis)(struct param_s *p, int, FILE *); |
97 |
} PARAMS; /* sender/receiver parameters */ |
98 |
|
99 |
PARAMS curparams; |
100 |
char curmod[128]; |
101 |
char newparams[1024]; |
102 |
|
103 |
typedef int SURFSAMP(FVECT, SURF *, double); |
104 |
|
105 |
static SURFSAMP ssamp_bad, ssamp_poly, ssamp_ring; |
106 |
|
107 |
SURFSAMP *orig_in_surf[4] = { |
108 |
ssamp_bad, ssamp_poly, ssamp_ring, ssamp_bad |
109 |
}; |
110 |
|
111 |
/* Clear parameter set */ |
112 |
static void |
113 |
clear_params(PARAMS *p, int reset_only) |
114 |
{ |
115 |
while (p->slist != NULL) { |
116 |
SURF *sdel = p->slist; |
117 |
p->slist = sdel->next; |
118 |
if (sdel->priv != NULL) |
119 |
free(sdel->priv); |
120 |
free(sdel); |
121 |
} |
122 |
if (reset_only) { |
123 |
p->nsurfs = 0; |
124 |
memset(p->nrm, 0, sizeof(FVECT)); |
125 |
memset(p->vup, 0, sizeof(FVECT)); |
126 |
p->outfn = NULL; |
127 |
return; |
128 |
} |
129 |
memset(p, 0, sizeof(PARAMS)); |
130 |
} |
131 |
|
132 |
/* Get surface type from name */ |
133 |
static int |
134 |
surf_type(const char *otype) |
135 |
{ |
136 |
if (!strcmp(otype, "polygon")) |
137 |
return(ST_POLY); |
138 |
if (!strcmp(otype, "ring")) |
139 |
return(ST_RING); |
140 |
if (!strcmp(otype, "source")) |
141 |
return(ST_SOURCE); |
142 |
return(ST_NONE); |
143 |
} |
144 |
|
145 |
/* Check if any of the characters in str2 are found in str1 */ |
146 |
static int |
147 |
matchany(const char *str1, const char *str2) |
148 |
{ |
149 |
while (*str1) { |
150 |
const char *cp = str2; |
151 |
while (*cp) |
152 |
if (*cp++ == *str1) |
153 |
return(*str1); |
154 |
++str1; |
155 |
} |
156 |
return(0); |
157 |
} |
158 |
|
159 |
/* Add arguments to oconv command */ |
160 |
static char * |
161 |
oconv_command(int ac, char *av[]) |
162 |
{ |
163 |
static char oconvbuf[2048] = "!oconv -f "; |
164 |
char *cp = oconvbuf + 10; |
165 |
char *recv = *av++; |
166 |
|
167 |
if (ac-- <= 0) |
168 |
return(NULL); |
169 |
while (ac-- > 0) { |
170 |
strcpy(cp, *av++); |
171 |
while (*cp) cp++; |
172 |
*cp++ = ' '; |
173 |
if (cp >= oconvbuf+(sizeof(oconvbuf)-32)) |
174 |
goto overrun; |
175 |
} |
176 |
/* receiver goes last */ |
177 |
if (matchany(recv, SPECIALS)) { |
178 |
*cp++ = QUOTCHAR; |
179 |
while (*recv) { |
180 |
if (cp >= oconvbuf+(sizeof(oconvbuf)-3)) |
181 |
goto overrun; |
182 |
*cp++ = *recv++; |
183 |
} |
184 |
*cp++ = QUOTCHAR; |
185 |
*cp = '\0'; |
186 |
} else |
187 |
strcpy(cp, recv); |
188 |
return(oconvbuf); |
189 |
overrun: |
190 |
fputs(progname, stderr); |
191 |
fputs(": too many file arguments!\n", stderr); |
192 |
exit(1); |
193 |
} |
194 |
|
195 |
/* Convert a set of arguments into a command line for pipe() or system() */ |
196 |
static char * |
197 |
convert_commandline(char *cmd, const int len, char *av[]) |
198 |
{ |
199 |
int match; |
200 |
char *cp; |
201 |
|
202 |
for (cp = cmd; *av != NULL; av++) { |
203 |
const int n = strlen(*av); |
204 |
if (cp+n >= cmd+(len-3)) { |
205 |
fputs(progname, stderr); |
206 |
return(NULL); |
207 |
} |
208 |
if (matchany(*av, SPECIALS)) { |
209 |
const int quote = |
210 |
#ifdef ALTQUOT |
211 |
strchr(*av, QUOTCHAR) ? ALTQUOT : |
212 |
#endif |
213 |
QUOTCHAR; |
214 |
*cp++ = quote; |
215 |
strcpy(cp, *av); |
216 |
cp += n; |
217 |
*cp++ = quote; |
218 |
} else { |
219 |
strcpy(cp, *av); |
220 |
cp += n; |
221 |
} |
222 |
*cp++ = ' '; |
223 |
} |
224 |
if (cp <= cmd) |
225 |
return(NULL); |
226 |
*--cp = '\0'; |
227 |
return(cmd); |
228 |
} |
229 |
|
230 |
/* Open a pipe to/from a command given as an argument list */ |
231 |
static FILE * |
232 |
popen_arglist(char *av[], char *mode) |
233 |
{ |
234 |
char cmd[10240]; |
235 |
|
236 |
if (!convert_commandline(cmd, sizeof(cmd), av)) { |
237 |
fputs(progname, stderr); |
238 |
fputs(": command line too long in popen_arglist()\n", stderr); |
239 |
return(NULL); |
240 |
} |
241 |
if (verbose > 0) |
242 |
fprintf(stderr, "%s: opening pipe %s: %s\n", |
243 |
progname, (*mode=='w') ? "to" : "from", cmd); |
244 |
return(popen(cmd, mode)); |
245 |
} |
246 |
|
247 |
#ifdef _WIN32 |
248 |
/* Execute system command (Windows version) */ |
249 |
static int |
250 |
my_exec(char *av[]) |
251 |
{ |
252 |
char cmd[10240]; |
253 |
|
254 |
if (!convert_commandline(cmd, sizeof(cmd), av)) { |
255 |
fputs(progname, stderr); |
256 |
fputs(": command line too long in my_exec()\n", stderr); |
257 |
return(1); |
258 |
} |
259 |
if (verbose > 0) |
260 |
fprintf(stderr, "%s: running: %s\n", progname, cmd); |
261 |
return(system(cmd)); |
262 |
} |
263 |
#else |
264 |
/* Execute system command in our stead (Unix version) */ |
265 |
static int |
266 |
my_exec(char *av[]) |
267 |
{ |
268 |
char *compath; |
269 |
|
270 |
if ((compath = getpath((char *)av[0], getenv("PATH"), X_OK)) == NULL) { |
271 |
fprintf(stderr, "%s: cannot locate %s\n", progname, av[0]); |
272 |
return(1); |
273 |
} |
274 |
if (verbose > 0) { |
275 |
char cmd[4096]; |
276 |
if (!convert_commandline(cmd, sizeof(cmd), av)) |
277 |
strcpy(cmd, "COMMAND TOO LONG TO SHOW"); |
278 |
fprintf(stderr, "%s: running: %s\n", progname, cmd); |
279 |
} |
280 |
execv(compath, av); /* successful call never returns */ |
281 |
perror(compath); |
282 |
return(1); |
283 |
} |
284 |
#endif |
285 |
|
286 |
/* Get normalized direction vector from string specification */ |
287 |
static int |
288 |
get_direction(FVECT dv, const char *s) |
289 |
{ |
290 |
int sign = 1; |
291 |
int axis = 0; |
292 |
|
293 |
memset(dv, 0, sizeof(FVECT)); |
294 |
nextchar: |
295 |
switch (*s) { |
296 |
case '+': |
297 |
++s; |
298 |
goto nextchar; |
299 |
case '-': |
300 |
sign = -sign; |
301 |
++s; |
302 |
goto nextchar; |
303 |
case 'z': |
304 |
case 'Z': |
305 |
++axis; |
306 |
case 'y': |
307 |
case 'Y': |
308 |
++axis; |
309 |
case 'x': |
310 |
case 'X': |
311 |
dv[axis] = sign; |
312 |
return(!s[1] | isspace(s[1])); |
313 |
default: |
314 |
break; |
315 |
} |
316 |
#ifdef SMLFLT |
317 |
if (sscanf(s, "%f,%f,%f", &dv[0], &dv[1], &dv[2]) != 3) |
318 |
#else |
319 |
if (sscanf(s, "%lf,%lf,%lf", &dv[0], &dv[1], &dv[2]) != 3) |
320 |
#endif |
321 |
return(0); |
322 |
dv[0] *= (RREAL)sign; |
323 |
return(normalize(dv) > 0); |
324 |
} |
325 |
|
326 |
/* Parse program parameters (directives) */ |
327 |
static int |
328 |
parse_params(PARAMS *p, char *pargs) |
329 |
{ |
330 |
char *cp = pargs; |
331 |
int nparams = 0; |
332 |
int quot; |
333 |
int i; |
334 |
|
335 |
for ( ; ; ) { |
336 |
switch (*cp++) { |
337 |
case 'h': |
338 |
if (*cp++ != '=') |
339 |
break; |
340 |
if ((*cp == '+') | (*cp == '-')) |
341 |
p->sign = *cp++; |
342 |
else |
343 |
p->sign = '+'; |
344 |
p->hsiz = 0; |
345 |
i = 0; |
346 |
while (*cp && !isspace(*cp)) { |
347 |
if (isdigit(*cp)) |
348 |
p->hsiz = 10*p->hsiz + *cp - '0'; |
349 |
p->hemis[i++] = *cp++; |
350 |
} |
351 |
if (!i) |
352 |
break; |
353 |
p->hemis[i] = '\0'; |
354 |
p->hsiz += !p->hsiz; |
355 |
++nparams; |
356 |
continue; |
357 |
case 'u': |
358 |
if (*cp++ != '=') |
359 |
break; |
360 |
if (!get_direction(p->vup, cp)) |
361 |
break; |
362 |
while (*cp && !isspace(*cp++)) |
363 |
; |
364 |
++nparams; |
365 |
continue; |
366 |
case 'o': |
367 |
if (*cp++ != '=') |
368 |
break; |
369 |
quot = 0; |
370 |
if ((*cp == '"') | (*cp == '\'')) |
371 |
quot = *cp++; |
372 |
i = 0; |
373 |
while (*cp && (quot ? (*cp != quot) : !isspace(*cp))) { |
374 |
i++; cp++; |
375 |
} |
376 |
if (!i) |
377 |
break; |
378 |
if (!*cp) { |
379 |
if (quot) |
380 |
break; |
381 |
cp[1] = '\0'; |
382 |
} |
383 |
*cp = '\0'; |
384 |
p->outfn = savqstr(cp-i); |
385 |
*cp++ = quot ? quot : ' '; |
386 |
++nparams; |
387 |
continue; |
388 |
case ' ': |
389 |
case '\t': |
390 |
case '\r': |
391 |
case '\n': |
392 |
continue; |
393 |
case '\0': |
394 |
return(nparams); |
395 |
default: |
396 |
break; |
397 |
} |
398 |
break; |
399 |
} |
400 |
fprintf(stderr, "%s: bad parameter string: %s", progname, pargs); |
401 |
exit(1); |
402 |
return(-1); /* pro forma return */ |
403 |
} |
404 |
|
405 |
/* Add receiver arguments (directives) corresponding to the current modifier */ |
406 |
static void |
407 |
finish_receiver(void) |
408 |
{ |
409 |
char sbuf[256]; |
410 |
int uniform = 0; |
411 |
char *calfn = NULL; |
412 |
char *params = NULL; |
413 |
char *binv = NULL; |
414 |
char *binf = NULL; |
415 |
char *nbins = NULL; |
416 |
|
417 |
if (!curmod[0]) { |
418 |
fputs(progname, stderr); |
419 |
fputs(": missing receiver surface!\n", stderr); |
420 |
exit(1); |
421 |
} |
422 |
if (curparams.outfn != NULL) { /* add output file spec. */ |
423 |
CHECKARGC(2); |
424 |
rcarg[nrcargs++] = "-o"; |
425 |
rcarg[nrcargs++] = curparams.outfn; |
426 |
} |
427 |
/* check arguments */ |
428 |
if (!curparams.hemis[0]) { |
429 |
fputs(progname, stderr); |
430 |
fputs(": missing hemisphere sampling type!\n", stderr); |
431 |
exit(1); |
432 |
} |
433 |
if (normalize(curparams.nrm) == 0) { |
434 |
fputs(progname, stderr); |
435 |
fputs(": undefined normal for hemisphere sampling\n", stderr); |
436 |
exit(1); |
437 |
} |
438 |
if (normalize(curparams.vup) == 0) { |
439 |
if (fabs(curparams.nrm[2]) < .7) |
440 |
curparams.vup[2] = 1; |
441 |
else |
442 |
curparams.vup[1] = 1; |
443 |
} |
444 |
/* determine sample type/bin */ |
445 |
if (tolower(curparams.hemis[0]) == 'u' | curparams.hemis[0] == '1') { |
446 |
sprintf(sbuf, "if(-Dx*%g-Dy*%g-Dz*%g,0,-1)", |
447 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2]); |
448 |
binv = savqstr(sbuf); |
449 |
nbins = "1"; /* uniform sampling -- one bin */ |
450 |
uniform = 1; |
451 |
} else if (tolower(curparams.hemis[0]) == 's' && |
452 |
tolower(curparams.hemis[1]) == 'c') { |
453 |
/* assign parameters */ |
454 |
if (curparams.hsiz <= 1) { |
455 |
fputs(progname, stderr); |
456 |
fputs(": missing size for Shirley-Chiu sampling!\n", stderr); |
457 |
exit(1); |
458 |
} |
459 |
calfn = shirchiufn; shirchiufn = NULL; |
460 |
sprintf(sbuf, "SCdim=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g,RHS=%c1", |
461 |
curparams.hsiz, |
462 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
463 |
curparams.vup[0], curparams.vup[1], curparams.vup[2], |
464 |
curparams.sign); |
465 |
params = savqstr(sbuf); |
466 |
binv = "scbin"; |
467 |
nbins = "SCdim*SCdim"; |
468 |
} else if ((tolower(curparams.hemis[0]) == 'r') | |
469 |
(tolower(curparams.hemis[0]) == 't')) { |
470 |
calfn = reinhfn; reinhfn = NULL; |
471 |
sprintf(sbuf, "MF=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g,RHS=%c1", |
472 |
curparams.hsiz, |
473 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
474 |
curparams.vup[0], curparams.vup[1], curparams.vup[2], |
475 |
curparams.sign); |
476 |
params = savqstr(sbuf); |
477 |
binv = "rbin"; |
478 |
nbins = "Nrbins"; |
479 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
480 |
!curparams.hemis[1] | |
481 |
(tolower(curparams.hemis[1]) == 'f') | |
482 |
(curparams.hemis[1] == '1')) { |
483 |
calfn = kfullfn; kfullfn = NULL; |
484 |
binf = "kbin"; |
485 |
nbins = "Nkbins"; |
486 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
487 |
(tolower(curparams.hemis[1]) == 'h') | |
488 |
(curparams.hemis[1] == '2')) { |
489 |
calfn = khalffn; khalffn = NULL; |
490 |
binf = "khbin"; |
491 |
nbins = "Nkhbins"; |
492 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
493 |
(tolower(curparams.hemis[1]) == 'q') | |
494 |
(curparams.hemis[1] == '4')) { |
495 |
calfn = kquarterfn; kquarterfn = NULL; |
496 |
binf = "kqbin"; |
497 |
nbins = "Nkqbins"; |
498 |
} else { |
499 |
fprintf(stderr, "%s: unrecognized hemisphere sampling: h=%s\n", |
500 |
progname, curparams.hemis); |
501 |
exit(1); |
502 |
} |
503 |
if (tolower(curparams.hemis[0]) == 'k') { |
504 |
sprintf(sbuf, "RHS=%c1", curparams.sign); |
505 |
params = savqstr(sbuf); |
506 |
} |
507 |
if (!uniform & (curparams.slist->styp == ST_SOURCE)) { |
508 |
SURF *sp; |
509 |
for (sp = curparams.slist; sp != NULL; sp = sp->next) |
510 |
if (fabs(sp->area - PI) > 1e-3) { |
511 |
fprintf(stderr, "%s: source '%s' must be 180-degrees\n", |
512 |
progname, sp->sname); |
513 |
exit(1); |
514 |
} |
515 |
} |
516 |
if (calfn != NULL) { /* add cal file if needed */ |
517 |
CHECKARGC(2); |
518 |
rcarg[nrcargs++] = "-f"; |
519 |
rcarg[nrcargs++] = calfn; |
520 |
} |
521 |
if (params != NULL) { /* parameters _after_ cal file */ |
522 |
CHECKARGC(2); |
523 |
rcarg[nrcargs++] = "-p"; |
524 |
rcarg[nrcargs++] = params; |
525 |
} |
526 |
if (nbins != NULL) { /* add #bins if set */ |
527 |
CHECKARGC(2); |
528 |
rcarg[nrcargs++] = "-bn"; |
529 |
rcarg[nrcargs++] = nbins; |
530 |
} |
531 |
if (binv != NULL) { |
532 |
CHECKARGC(2); /* assign bin variable */ |
533 |
rcarg[nrcargs++] = "-b"; |
534 |
rcarg[nrcargs++] = binv; |
535 |
} else if (binf != NULL) { |
536 |
CHECKARGC(2); /* assign bin function */ |
537 |
rcarg[nrcargs++] = "-b"; |
538 |
sprintf(sbuf, "%s(%g,%g,%g,%g,%g,%g)", binf, |
539 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
540 |
curparams.vup[0], curparams.vup[1], curparams.vup[2]); |
541 |
rcarg[nrcargs++] = savqstr(sbuf); |
542 |
} |
543 |
CHECKARGC(2); /* modifier argument goes last */ |
544 |
rcarg[nrcargs++] = "-m"; |
545 |
rcarg[nrcargs++] = savqstr(curmod); |
546 |
} |
547 |
|
548 |
/* Make randomly oriented tangent plane axes for given normal direction */ |
549 |
static void |
550 |
make_axes(FVECT uva[2], const FVECT nrm) |
551 |
{ |
552 |
int i; |
553 |
|
554 |
if (!getperpendicular(uva[0], nrm, 1)) { |
555 |
fputs(progname, stderr); |
556 |
fputs(": bad surface normal in make_axes!\n", stderr); |
557 |
exit(1); |
558 |
} |
559 |
fcross(uva[1], nrm, uva[0]); |
560 |
} |
561 |
|
562 |
/* Illegal sender surfaces end up here */ |
563 |
static int |
564 |
ssamp_bad(FVECT orig, SURF *sp, double x) |
565 |
{ |
566 |
fprintf(stderr, "%s: illegal sender surface '%s'\n", |
567 |
progname, sp->sname); |
568 |
return(0); |
569 |
} |
570 |
|
571 |
/* Generate origin on ring surface from uniform random variable */ |
572 |
static int |
573 |
ssamp_ring(FVECT orig, SURF *sp, double x) |
574 |
{ |
575 |
FVECT *uva = (FVECT *)sp->priv; |
576 |
double samp2[2]; |
577 |
double uv[2]; |
578 |
int i; |
579 |
|
580 |
if (uva == NULL) { /* need tangent axes */ |
581 |
uva = (FVECT *)malloc(sizeof(FVECT)*2); |
582 |
if (uva == NULL) { |
583 |
fputs(progname, stderr); |
584 |
fputs(": out of memory in ssamp_ring!\n", stderr); |
585 |
return(0); |
586 |
} |
587 |
make_axes(uva, sp->snrm); |
588 |
sp->priv = (void *)uva; |
589 |
} |
590 |
SDmultiSamp(samp2, 2, x); |
591 |
samp2[0] = sqrt(samp2[0]*sp->area*(1./PI) + sp->farg[6]*sp->farg[6]); |
592 |
samp2[1] *= 2.*PI; |
593 |
uv[0] = samp2[0]*tcos(samp2[1]); |
594 |
uv[1] = samp2[0]*tsin(samp2[1]); |
595 |
for (i = 3; i--; ) |
596 |
orig[i] = sp->farg[i] + uv[0]*uva[0][i] + uv[1]*uva[1][i]; |
597 |
return(1); |
598 |
} |
599 |
|
600 |
/* Add triangle to polygon's list (call-back function) */ |
601 |
static int |
602 |
add_triangle(const Vert2_list *tp, int a, int b, int c) |
603 |
{ |
604 |
POLYTRIS *ptp = (POLYTRIS *)tp->p; |
605 |
struct ptri *trip = ptp->tri + ptp->ntris++; |
606 |
|
607 |
trip->vndx[0] = a; |
608 |
trip->vndx[1] = b; |
609 |
trip->vndx[2] = c; |
610 |
return(1); |
611 |
} |
612 |
|
613 |
/* Generate origin on polygon surface from uniform random variable */ |
614 |
static int |
615 |
ssamp_poly(FVECT orig, SURF *sp, double x) |
616 |
{ |
617 |
POLYTRIS *ptp = (POLYTRIS *)sp->priv; |
618 |
double samp2[2]; |
619 |
double *v0, *v1, *v2; |
620 |
int i; |
621 |
|
622 |
if (ptp == NULL) { /* need to triangulate */ |
623 |
ptp = (POLYTRIS *)malloc(sizeof(POLYTRIS) + |
624 |
sizeof(struct ptri)*(sp->nfargs/3 - 3)); |
625 |
if (ptp == NULL) |
626 |
goto memerr; |
627 |
if (sp->nfargs == 3) { /* simple case */ |
628 |
ptp->ntris = 1; |
629 |
ptp->tri[0].vndx[0] = 0; |
630 |
ptp->tri[0].vndx[1] = 1; |
631 |
ptp->tri[0].vndx[2] = 2; |
632 |
ptp->tri[0].afrac = 1; |
633 |
} else { |
634 |
Vert2_list *v2l = polyAlloc(sp->nfargs/3); |
635 |
if (v2l == NULL) |
636 |
goto memerr; |
637 |
make_axes(ptp->uva, sp->snrm); |
638 |
for (i = v2l->nv; i--; ) { |
639 |
v2l->v[i].mX = DOT(sp->farg+3*i, ptp->uva[0]); |
640 |
v2l->v[i].mY = DOT(sp->farg+3*i, ptp->uva[1]); |
641 |
} |
642 |
ptp->ntris = 0; |
643 |
v2l->p = (void *)ptp; |
644 |
if (!polyTriangulate(v2l, add_triangle)) { |
645 |
fprintf(stderr, |
646 |
"%s: cannot triangulate polygon '%s'\n", |
647 |
progname, sp->sname); |
648 |
return(0); |
649 |
} |
650 |
for (i = ptp->ntris; i--; ) { |
651 |
int a = ptp->tri[i].vndx[0]; |
652 |
int b = ptp->tri[i].vndx[1]; |
653 |
int c = ptp->tri[i].vndx[2]; |
654 |
ptp->tri[i].afrac = |
655 |
(v2l->v[a].mX*v2l->v[b].mY - |
656 |
v2l->v[b].mX*v2l->v[a].mY + |
657 |
v2l->v[b].mX*v2l->v[c].mY - |
658 |
v2l->v[c].mX*v2l->v[b].mY + |
659 |
v2l->v[c].mX*v2l->v[a].mY - |
660 |
v2l->v[a].mX*v2l->v[c].mY) / |
661 |
(2.*sp->area); |
662 |
} |
663 |
polyFree(v2l); |
664 |
} |
665 |
sp->priv = (void *)ptp; |
666 |
} |
667 |
/* pick triangle by partial area */ |
668 |
for (i = 0; i < ptp->ntris && x > ptp->tri[i].afrac; i++) |
669 |
x -= ptp->tri[i].afrac; |
670 |
SDmultiSamp(samp2, 2, x/ptp->tri[i].afrac); |
671 |
samp2[0] *= samp2[1] = sqrt(samp2[1]); |
672 |
samp2[1] = 1. - samp2[1]; |
673 |
v0 = sp->farg + 3*ptp->tri[i].vndx[0]; |
674 |
v1 = sp->farg + 3*ptp->tri[i].vndx[1]; |
675 |
v2 = sp->farg + 3*ptp->tri[i].vndx[2]; |
676 |
for (i = 3; i--; ) |
677 |
orig[i] = v0[i] + samp2[0]*(v1[i] - v0[i]) |
678 |
+ samp2[1]*(v2[i] - v0[i]) ; |
679 |
return(1); |
680 |
memerr: |
681 |
fputs(progname, stderr); |
682 |
fputs(": out of memory in ssamp_poly!\n", stderr); |
683 |
return(0); |
684 |
} |
685 |
|
686 |
/* Compute sample origin based on projected areas of sender subsurfaces */ |
687 |
static int |
688 |
sample_origin(PARAMS *p, FVECT orig, const FVECT rdir, double x) |
689 |
{ |
690 |
static double *projsa; |
691 |
static int nall; |
692 |
double tarea = 0; |
693 |
int i; |
694 |
SURF *sp; |
695 |
/* special case for lone surface */ |
696 |
if (p->nsurfs == 1) { |
697 |
sp = p->slist; |
698 |
if (DOT(sp->snrm, rdir) >= FTINY) { |
699 |
fprintf(stderr, |
700 |
"%s: internal - sample behind sender '%s'\n", |
701 |
progname, sp->sname); |
702 |
return(0); |
703 |
} |
704 |
return((*orig_in_surf[sp->styp])(orig, sp, x)); |
705 |
} |
706 |
if (p->nsurfs > nall) { /* (re)allocate surface area cache */ |
707 |
if (projsa) free(projsa); |
708 |
projsa = (double *)malloc(sizeof(double)*p->nsurfs); |
709 |
if (!projsa) return(0); |
710 |
nall = p->nsurfs; |
711 |
} |
712 |
/* compute projected areas */ |
713 |
for (i = 0, sp = p->slist; sp != NULL; i++, sp = sp->next) { |
714 |
projsa[i] = -DOT(sp->snrm, rdir) * sp->area; |
715 |
tarea += projsa[i] *= (double)(projsa[i] > FTINY); |
716 |
} |
717 |
if (tarea <= FTINY) { /* wrong side of sender? */ |
718 |
fputs(progname, stderr); |
719 |
fputs(": internal - sample behind all sender elements!\n", |
720 |
stderr); |
721 |
return(0); |
722 |
} |
723 |
tarea *= x; /* get surface from list */ |
724 |
for (i = 0, sp = p->slist; tarea > projsa[i]; sp = sp->next) |
725 |
tarea -= projsa[i++]; |
726 |
return((*orig_in_surf[sp->styp])(orig, sp, tarea/projsa[i])); |
727 |
} |
728 |
|
729 |
/* Uniform sample generator */ |
730 |
static int |
731 |
sample_uniform(PARAMS *p, int b, FILE *fp) |
732 |
{ |
733 |
int n = sampcnt; |
734 |
double samp3[3]; |
735 |
double duvw[3]; |
736 |
FVECT orig_dir[2]; |
737 |
int i; |
738 |
|
739 |
if (fp == NULL) /* just requesting number of bins? */ |
740 |
return(1); |
741 |
|
742 |
while (n--) { /* stratified hemisphere sampling */ |
743 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
744 |
SDsquare2disk(duvw, samp3[1], samp3[2]); |
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 |
/* Shirly-Chiu sample generator */ |
759 |
static int |
760 |
sample_shirchiu(PARAMS *p, int b, FILE *fp) |
761 |
{ |
762 |
int n = sampcnt; |
763 |
double samp3[3]; |
764 |
double duvw[3]; |
765 |
FVECT orig_dir[2]; |
766 |
int i; |
767 |
|
768 |
if (fp == NULL) /* just requesting number of bins? */ |
769 |
return(p->hsiz*p->hsiz); |
770 |
|
771 |
while (n--) { /* stratified sampling */ |
772 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
773 |
SDsquare2disk(duvw, (b/p->hsiz + samp3[1])/curparams.hsiz, |
774 |
(b%p->hsiz + samp3[2])/curparams.hsiz); |
775 |
duvw[2] = sqrt(1. - duvw[0]*duvw[0] - duvw[1]*duvw[1]); |
776 |
for (i = 3; i--; ) |
777 |
orig_dir[1][i] = -duvw[0]*p->udir[i] - |
778 |
duvw[1]*p->vdir[i] - |
779 |
duvw[2]*p->nrm[i] ; |
780 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0])) |
781 |
return(0); |
782 |
if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2) |
783 |
return(0); |
784 |
} |
785 |
return(1); |
786 |
} |
787 |
|
788 |
/* Reinhart/Tregenza sample generator */ |
789 |
static int |
790 |
sample_reinhart(PARAMS *p, int b, FILE *fp) |
791 |
{ |
792 |
#define T_NALT 7 |
793 |
static const int tnaz[T_NALT] = {30, 30, 24, 24, 18, 12, 6}; |
794 |
const int RowMax = T_NALT*p->hsiz + 1; |
795 |
const double RAH = (.5*PI)/(RowMax-.5); |
796 |
#define rnaz(r) (r >= RowMax-1 ? 1 : p->hsiz*tnaz[r/p->hsiz]) |
797 |
int n = sampcnt; |
798 |
int row, col; |
799 |
double samp3[3]; |
800 |
double alt, azi; |
801 |
double duvw[3]; |
802 |
FVECT orig_dir[2]; |
803 |
int i; |
804 |
|
805 |
if (fp == NULL) { /* just requesting number of bins? */ |
806 |
n = 0; |
807 |
for (row = RowMax; row--; ) n += rnaz(row); |
808 |
return(n); |
809 |
} |
810 |
row = 0; /* identify row & column */ |
811 |
col = b; |
812 |
while (col >= rnaz(row)) { |
813 |
col -= rnaz(row); |
814 |
++row; |
815 |
} |
816 |
while (n--) { /* stratified sampling */ |
817 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
818 |
alt = (row+samp3[1])*RAH; |
819 |
azi = (2.*PI)*(col+samp3[2]-.5)/rnaz(row); |
820 |
duvw[2] = cos(alt); /* measured from horizon */ |
821 |
duvw[0] = tsin(azi)*duvw[2]; |
822 |
duvw[1] = tcos(azi)*duvw[2]; |
823 |
duvw[2] = sqrt(1. - duvw[2]*duvw[2]); |
824 |
for (i = 3; i--; ) |
825 |
orig_dir[1][i] = -duvw[0]*p->udir[i] - |
826 |
duvw[1]*p->vdir[i] - |
827 |
duvw[2]*p->nrm[i] ; |
828 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0])) |
829 |
return(0); |
830 |
if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2) |
831 |
return(0); |
832 |
} |
833 |
return(1); |
834 |
#undef rnaz |
835 |
#undef T_NALT |
836 |
} |
837 |
|
838 |
/* Klems sample generator */ |
839 |
static int |
840 |
sample_klems(PARAMS *p, int b, FILE *fp) |
841 |
{ |
842 |
static const char bname[4][20] = { |
843 |
"LBNL/Klems Full", |
844 |
"LBNL/Klems Half", |
845 |
"INTERNAL ERROR", |
846 |
"LBNL/Klems Quarter" |
847 |
}; |
848 |
static ANGLE_BASIS *kbasis[4]; |
849 |
const int bi = p->hemis[1] - '1'; |
850 |
int n = sampcnt; |
851 |
double samp2[2]; |
852 |
double duvw[3]; |
853 |
FVECT orig_dir[2]; |
854 |
int i; |
855 |
|
856 |
if (!kbasis[bi]) { /* need to get basis, first */ |
857 |
for (i = 4; i--; ) |
858 |
if (!strcasecmp(abase_list[i].name, bname[bi])) { |
859 |
kbasis[bi] = &abase_list[i]; |
860 |
break; |
861 |
} |
862 |
if (i < 0) { |
863 |
fprintf(stderr, "%s: unknown hemisphere basis '%s'\n", |
864 |
progname, bname[bi]); |
865 |
return(0); |
866 |
} |
867 |
} |
868 |
if (fp == NULL) /* just requesting number of bins? */ |
869 |
return(kbasis[bi]->nangles); |
870 |
|
871 |
while (n--) { /* stratified sampling */ |
872 |
SDmultiSamp(samp2, 2, (n+frandom())/sampcnt); |
873 |
if (!fo_getvec(duvw, b+samp2[1], kbasis[bi])) |
874 |
return(0); |
875 |
for (i = 3; i--; ) |
876 |
orig_dir[1][i] = -duvw[0]*p->udir[i] - |
877 |
duvw[1]*p->vdir[i] - |
878 |
duvw[2]*p->nrm[i] ; |
879 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp2[0])) |
880 |
return(0); |
881 |
if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2) |
882 |
return(0); |
883 |
} |
884 |
return(1); |
885 |
} |
886 |
|
887 |
/* Prepare hemisphere basis sampler that will send rays to rcontrib */ |
888 |
static int |
889 |
prepare_sampler(void) |
890 |
{ |
891 |
if (curparams.slist == NULL) { /* missing sample surface! */ |
892 |
fputs(progname, stderr); |
893 |
fputs(": no sender surface!\n", stderr); |
894 |
return(-1); |
895 |
} |
896 |
/* misplaced output file spec. */ |
897 |
if ((curparams.outfn != NULL) & (verbose >= 0)) |
898 |
fprintf(stderr, "%s: warning - ignoring output file in sender ('%s')\n", |
899 |
progname, curparams.outfn); |
900 |
/* check/set basis hemisphere */ |
901 |
if (!curparams.hemis[0]) { |
902 |
fputs(progname, stderr); |
903 |
fputs(": missing sender sampling type!\n", stderr); |
904 |
return(-1); |
905 |
} |
906 |
if (normalize(curparams.nrm) == 0) { |
907 |
fputs(progname, stderr); |
908 |
fputs(": undefined normal for sender sampling\n", stderr); |
909 |
return(-1); |
910 |
} |
911 |
if (normalize(curparams.vup) == 0) { |
912 |
if (fabs(curparams.nrm[2]) < .7) |
913 |
curparams.vup[2] = 1; |
914 |
else |
915 |
curparams.vup[1] = 1; |
916 |
} |
917 |
fcross(curparams.udir, curparams.vup, curparams.nrm); |
918 |
if (normalize(curparams.udir) == 0) { |
919 |
fputs(progname, stderr); |
920 |
fputs(": up vector coincides with sender normal\n", stderr); |
921 |
return(-1); |
922 |
} |
923 |
fcross(curparams.vdir, curparams.nrm, curparams.udir); |
924 |
if (curparams.sign == '-') { /* left-handed coordinate system? */ |
925 |
curparams.udir[0] *= -1.; |
926 |
curparams.udir[1] *= -1.; |
927 |
curparams.udir[2] *= -1.; |
928 |
} |
929 |
if (tolower(curparams.hemis[0]) == 'u' | curparams.hemis[0] == '1') |
930 |
curparams.sample_basis = sample_uniform; |
931 |
else if (tolower(curparams.hemis[0]) == 's' && |
932 |
tolower(curparams.hemis[1]) == 'c') |
933 |
curparams.sample_basis = sample_shirchiu; |
934 |
else if ((tolower(curparams.hemis[0]) == 'r') | |
935 |
(tolower(curparams.hemis[0]) == 't')) |
936 |
curparams.sample_basis = sample_reinhart; |
937 |
else if (tolower(curparams.hemis[0]) == 'k') { |
938 |
switch (curparams.hemis[1]) { |
939 |
case '1': |
940 |
case '2': |
941 |
case '4': |
942 |
break; |
943 |
case 'f': |
944 |
case 'F': |
945 |
case '\0': |
946 |
curparams.hemis[1] = '1'; |
947 |
break; |
948 |
case 'h': |
949 |
case 'H': |
950 |
curparams.hemis[1] = '2'; |
951 |
break; |
952 |
case 'q': |
953 |
case 'Q': |
954 |
curparams.hemis[1] = '4'; |
955 |
break; |
956 |
default: |
957 |
goto unrecognized; |
958 |
} |
959 |
curparams.hemis[2] = '\0'; |
960 |
curparams.sample_basis = sample_klems; |
961 |
} else |
962 |
goto unrecognized; |
963 |
/* return number of bins */ |
964 |
return((*curparams.sample_basis)(&curparams,0,NULL)); |
965 |
unrecognized: |
966 |
fprintf(stderr, "%s: unrecognized sender sampling: h=%s\n", |
967 |
progname, curparams.hemis); |
968 |
return(-1); |
969 |
} |
970 |
|
971 |
/* Compute normal and area for polygon */ |
972 |
static int |
973 |
finish_polygon(SURF *p) |
974 |
{ |
975 |
const int nv = p->nfargs / 3; |
976 |
FVECT e1, e2, vc; |
977 |
int i; |
978 |
|
979 |
memset(p->snrm, 0, sizeof(FVECT)); |
980 |
VSUB(e1, p->farg+3, p->farg); |
981 |
for (i = 2; i < nv; i++) { |
982 |
VSUB(e2, p->farg+3*i, p->farg); |
983 |
VCROSS(vc, e1, e2); |
984 |
p->snrm[0] += vc[0]; |
985 |
p->snrm[1] += vc[1]; |
986 |
p->snrm[2] += vc[2]; |
987 |
VCOPY(e1, e2); |
988 |
} |
989 |
p->area = normalize(p->snrm)*0.5; |
990 |
return(p->area > FTINY); |
991 |
} |
992 |
|
993 |
/* Add a surface to our current parameters */ |
994 |
static void |
995 |
add_surface(int st, const char *oname, FILE *fp) |
996 |
{ |
997 |
SURF *snew; |
998 |
int n; |
999 |
/* get floating-point arguments */ |
1000 |
if (!fscanf(fp, "%d", &n)) return; |
1001 |
while (n-- > 0) fscanf(fp, "%*s"); |
1002 |
if (!fscanf(fp, "%d", &n)) return; |
1003 |
while (n-- > 0) fscanf(fp, "%*d"); |
1004 |
if (!fscanf(fp, "%d", &n) || n <= 0) return; |
1005 |
snew = (SURF *)malloc(sizeof(SURF) + sizeof(double)*(n-1)); |
1006 |
if (snew == NULL) { |
1007 |
fputs(progname, stderr); |
1008 |
fputs(": out of memory!\n", stderr); |
1009 |
exit(1); |
1010 |
} |
1011 |
strncpy(snew->sname, oname, sizeof(snew->sname)-1); |
1012 |
snew->sname[sizeof(snew->sname)-1] = '\0'; |
1013 |
snew->styp = st; |
1014 |
snew->priv = NULL; |
1015 |
snew->nfargs = n; |
1016 |
for (n = 0; n < snew->nfargs; n++) |
1017 |
if (fscanf(fp, "%lf", &snew->farg[n]) != 1) { |
1018 |
fprintf(stderr, "%s: error reading arguments for '%s'\n", |
1019 |
progname, oname); |
1020 |
exit(1); |
1021 |
} |
1022 |
switch (st) { |
1023 |
case ST_RING: |
1024 |
if (snew->nfargs != 8) |
1025 |
goto badcount; |
1026 |
VCOPY(snew->snrm, snew->farg+3); |
1027 |
if (normalize(snew->snrm) == 0) |
1028 |
goto badnorm; |
1029 |
if (snew->farg[7] < snew->farg[6]) { |
1030 |
double t = snew->farg[7]; |
1031 |
snew->farg[7] = snew->farg[6]; |
1032 |
snew->farg[6] = t; |
1033 |
} |
1034 |
snew->area = PI*(snew->farg[7]*snew->farg[7] - |
1035 |
snew->farg[6]*snew->farg[6]); |
1036 |
break; |
1037 |
case ST_POLY: |
1038 |
if (snew->nfargs < 9 || snew->nfargs % 3) |
1039 |
goto badcount; |
1040 |
finish_polygon(snew); |
1041 |
break; |
1042 |
case ST_SOURCE: |
1043 |
if (snew->nfargs != 4) |
1044 |
goto badcount; |
1045 |
for (n = 3; n--; ) /* need to reverse "normal" */ |
1046 |
snew->snrm[n] = -snew->farg[n]; |
1047 |
if (normalize(snew->snrm) == 0) |
1048 |
goto badnorm; |
1049 |
snew->area = sin((PI/180./2.)*snew->farg[3]); |
1050 |
snew->area *= PI*snew->area; |
1051 |
break; |
1052 |
} |
1053 |
if ((snew->area <= FTINY) & (verbose >= 0)) { |
1054 |
fprintf(stderr, "%s: warning - zero area for surface '%s'\n", |
1055 |
progname, oname); |
1056 |
free(snew); |
1057 |
return; |
1058 |
} |
1059 |
VSUM(curparams.nrm, curparams.nrm, snew->snrm, snew->area); |
1060 |
snew->next = curparams.slist; |
1061 |
curparams.slist = snew; |
1062 |
curparams.nsurfs++; |
1063 |
return; |
1064 |
badcount: |
1065 |
fprintf(stderr, "%s: bad argument count for surface element '%s'\n", |
1066 |
progname, oname); |
1067 |
exit(1); |
1068 |
badnorm: |
1069 |
fprintf(stderr, "%s: bad orientation for surface element '%s'\n", |
1070 |
progname, oname); |
1071 |
exit(1); |
1072 |
} |
1073 |
|
1074 |
/* Parse a receiver object (look for modifiers to add to rcontrib command) */ |
1075 |
static int |
1076 |
add_recv_object(FILE *fp) |
1077 |
{ |
1078 |
int st; |
1079 |
char thismod[128], otype[32], oname[128]; |
1080 |
int n; |
1081 |
|
1082 |
if (fscanf(fp, "%s %s %s", thismod, otype, oname) != 3) |
1083 |
return(0); /* must have hit EOF! */ |
1084 |
if (!strcmp(otype, "alias")) { |
1085 |
fscanf(fp, "%*s"); /* skip alias */ |
1086 |
return(0); |
1087 |
} |
1088 |
/* is it a new receiver? */ |
1089 |
if ((st = surf_type(otype)) != ST_NONE) { |
1090 |
if (curparams.slist != NULL && (st == ST_SOURCE) ^ |
1091 |
(curparams.slist->styp == ST_SOURCE)) { |
1092 |
fputs(progname, stderr); |
1093 |
fputs(": cannot mix source/non-source receivers!\n", stderr); |
1094 |
return(-1); |
1095 |
} |
1096 |
if (strcmp(thismod, curmod)) { |
1097 |
if (curmod[0]) { /* output last receiver? */ |
1098 |
finish_receiver(); |
1099 |
clear_params(&curparams, 1); |
1100 |
} |
1101 |
parse_params(&curparams, newparams); |
1102 |
newparams[0] = '\0'; |
1103 |
strcpy(curmod, thismod); |
1104 |
} |
1105 |
add_surface(st, oname, fp); /* read & store surface */ |
1106 |
return(1); |
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 |
/* Parse a sender object */ |
1119 |
static int |
1120 |
add_send_object(FILE *fp) |
1121 |
{ |
1122 |
int st; |
1123 |
char thismod[128], otype[32], oname[128]; |
1124 |
int n; |
1125 |
|
1126 |
if (fscanf(fp, "%s %s %s", thismod, otype, oname) != 3) |
1127 |
return(0); /* must have hit EOF! */ |
1128 |
if (!strcmp(otype, "alias")) { |
1129 |
fscanf(fp, "%*s"); /* skip alias */ |
1130 |
return(0); |
1131 |
} |
1132 |
/* is it a new surface? */ |
1133 |
if ((st = surf_type(otype)) != ST_NONE) { |
1134 |
if (st == ST_SOURCE) { |
1135 |
fputs(progname, stderr); |
1136 |
fputs(": cannot use source as a sender!\n", stderr); |
1137 |
return(-1); |
1138 |
} |
1139 |
if (strcmp(thismod, curmod)) { |
1140 |
if (curmod[0]) { |
1141 |
fputs(progname, stderr); |
1142 |
fputs(": warning - multiple modifiers in sender\n", |
1143 |
stderr); |
1144 |
} |
1145 |
strcpy(curmod, thismod); |
1146 |
} |
1147 |
parse_params(&curparams, newparams); |
1148 |
newparams[0] = '\0'; |
1149 |
add_surface(st, oname, fp); /* read & store surface */ |
1150 |
return(0); |
1151 |
} |
1152 |
/* else skip arguments */ |
1153 |
if (!fscanf(fp, "%d", &n)) return(0); |
1154 |
while (n-- > 0) fscanf(fp, "%*s"); |
1155 |
if (!fscanf(fp, "%d", &n)) return(0); |
1156 |
while (n-- > 0) fscanf(fp, "%*d"); |
1157 |
if (!fscanf(fp, "%d", &n)) return(0); |
1158 |
while (n-- > 0) fscanf(fp, "%*f"); |
1159 |
return(0); |
1160 |
} |
1161 |
|
1162 |
/* Load a Radiance scene using the given callback function for objects */ |
1163 |
static int |
1164 |
load_scene(const char *inspec, int (*ocb)(FILE *)) |
1165 |
{ |
1166 |
int rv = 0; |
1167 |
char inpbuf[1024]; |
1168 |
FILE *fp; |
1169 |
int c; |
1170 |
|
1171 |
if (*inspec == '!') |
1172 |
fp = popen(inspec+1, "r"); |
1173 |
else |
1174 |
fp = fopen(inspec, "r"); |
1175 |
if (fp == NULL) { |
1176 |
fprintf(stderr, "%s: cannot load '%s'\n", progname, inspec); |
1177 |
return(-1); |
1178 |
} |
1179 |
while ((c = getc(fp)) != EOF) { /* load receiver data */ |
1180 |
if (isspace(c)) /* skip leading white space */ |
1181 |
continue; |
1182 |
if (c == '!') { /* read from a new command */ |
1183 |
inpbuf[0] = c; |
1184 |
if (fgetline(inpbuf+1, sizeof(inpbuf)-1, fp) != NULL) { |
1185 |
if ((c = load_scene(inpbuf, ocb)) < 0) |
1186 |
return(c); |
1187 |
rv += c; |
1188 |
} |
1189 |
continue; |
1190 |
} |
1191 |
if (c == '#') { /* parameters/comment */ |
1192 |
if ((c = getc(fp)) == EOF || ungetc(c,fp) == EOF) |
1193 |
break; |
1194 |
if (!isspace(c) && fscanf(fp, "%s", inpbuf) == 1 && |
1195 |
!strcmp(inpbuf, PARAMSTART)) { |
1196 |
if (fgets(inpbuf, sizeof(inpbuf), fp) != NULL) |
1197 |
strcat(newparams, inpbuf); |
1198 |
continue; |
1199 |
} |
1200 |
while ((c = getc(fp)) != EOF && c != '\n') |
1201 |
; /* else skipping comment */ |
1202 |
continue; |
1203 |
} |
1204 |
ungetc(c, fp); /* else check object for receiver */ |
1205 |
c = (*ocb)(fp); |
1206 |
if (c < 0) |
1207 |
return(c); |
1208 |
rv += c; |
1209 |
} |
1210 |
/* close our input stream */ |
1211 |
c = (*inspec == '!') ? pclose(fp) : fclose(fp); |
1212 |
if (c != 0) { |
1213 |
fprintf(stderr, "%s: error loading '%s'\n", progname, inspec); |
1214 |
return(-1); |
1215 |
} |
1216 |
return(rv); |
1217 |
} |
1218 |
|
1219 |
/* Get command arguments and run program */ |
1220 |
int |
1221 |
main(int argc, char *argv[]) |
1222 |
{ |
1223 |
char fmtopt[6] = "-faa"; /* default output is ASCII */ |
1224 |
char *xrs=NULL, *yrs=NULL, *ldopt=NULL; |
1225 |
char *iropt = NULL; |
1226 |
char *sendfn; |
1227 |
char sampcntbuf[32], nsbinbuf[32]; |
1228 |
FILE *rcfp; |
1229 |
int nsbins; |
1230 |
int a, i; |
1231 |
/* screen rcontrib options */ |
1232 |
progname = argv[0]; |
1233 |
for (a = 1; a < argc-2; a++) { |
1234 |
int na; |
1235 |
/* check for argument expansion */ |
1236 |
while ((na = expandarg(&argc, &argv, a)) > 0) |
1237 |
; |
1238 |
if (na < 0) { |
1239 |
fprintf(stderr, "%s: cannot expand '%s'\n", |
1240 |
progname, argv[a]); |
1241 |
return(1); |
1242 |
} |
1243 |
if (argv[a][0] != '-' || !argv[a][1]) |
1244 |
break; |
1245 |
na = 1; |
1246 |
switch (argv[a][1]) { /* !! Keep consistent !! */ |
1247 |
case 'v': /* verbose mode */ |
1248 |
verbose = 1; |
1249 |
na = 0; |
1250 |
continue; |
1251 |
case 'f': /* special case for -fo, -ff, etc. */ |
1252 |
switch (argv[a][2]) { |
1253 |
case '\0': /* cal file */ |
1254 |
goto userr; |
1255 |
case 'o': /* force output */ |
1256 |
goto userr; |
1257 |
case 'a': /* output format */ |
1258 |
case 'f': |
1259 |
case 'd': |
1260 |
case 'c': |
1261 |
if (!(fmtopt[3] = argv[a][3])) |
1262 |
fmtopt[3] = argv[a][2]; |
1263 |
fmtopt[2] = argv[a][2]; |
1264 |
na = 0; |
1265 |
continue; /* will pass later */ |
1266 |
default: |
1267 |
goto userr; |
1268 |
} |
1269 |
break; |
1270 |
case 'x': /* x-resolution */ |
1271 |
xrs = argv[++a]; |
1272 |
na = 0; |
1273 |
continue; |
1274 |
case 'y': /* y-resolution */ |
1275 |
yrs = argv[++a]; |
1276 |
na = 0; |
1277 |
continue; |
1278 |
case 'c': /* number of samples */ |
1279 |
sampcnt = atoi(argv[++a]); |
1280 |
if (sampcnt <= 0) |
1281 |
goto userr; |
1282 |
na = 0; /* we re-add this later */ |
1283 |
continue; |
1284 |
case 'I': /* only for pass-through mode */ |
1285 |
case 'i': |
1286 |
iropt = argv[a]; |
1287 |
na = 0; |
1288 |
continue; |
1289 |
case 'w': /* options without arguments */ |
1290 |
if (argv[a][2] != '+') verbose = -1; |
1291 |
case 'V': |
1292 |
case 'u': |
1293 |
case 'h': |
1294 |
case 'r': |
1295 |
break; |
1296 |
case 'n': /* options with 1 argument */ |
1297 |
case 's': |
1298 |
case 'o': |
1299 |
na = 2; |
1300 |
break; |
1301 |
case 'b': /* special case */ |
1302 |
if (argv[a][2] != 'v') goto userr; |
1303 |
break; |
1304 |
case 'l': /* special case */ |
1305 |
if (argv[a][2] == 'd') { |
1306 |
ldopt = argv[a]; |
1307 |
na = 0; |
1308 |
continue; |
1309 |
} |
1310 |
na = 2; |
1311 |
break; |
1312 |
case 'd': /* special case */ |
1313 |
if (argv[a][2] != 'v') na = 2; |
1314 |
break; |
1315 |
case 'a': /* special case */ |
1316 |
if (argv[a][2] == 'p') { |
1317 |
na = 2; /* photon map [+ bandwidth(s)] */ |
1318 |
if (a < argc-3 && atoi(argv[a+1]) > 0) |
1319 |
na += 1 + (a < argc-4 && atoi(argv[a+2]) > 0); |
1320 |
} else |
1321 |
na = (argv[a][2] == 'v') ? 4 : 2; |
1322 |
break; |
1323 |
case 'm': /* special case */ |
1324 |
if (!argv[a][2]) goto userr; |
1325 |
na = (argv[a][2] == 'e') | (argv[a][2] == 'a') ? 4 : 2; |
1326 |
break; |
1327 |
default: /* anything else is verbotten */ |
1328 |
goto userr; |
1329 |
} |
1330 |
if (na <= 0) continue; |
1331 |
CHECKARGC(na); /* pass on option */ |
1332 |
rcarg[nrcargs++] = argv[a]; |
1333 |
while (--na) /* + arguments if any */ |
1334 |
rcarg[nrcargs++] = argv[++a]; |
1335 |
} |
1336 |
if (a > argc-2) |
1337 |
goto userr; /* check at end of options */ |
1338 |
sendfn = argv[a++]; /* assign sender & receiver inputs */ |
1339 |
if (sendfn[0] == '-') { /* user wants pass-through mode? */ |
1340 |
if (sendfn[1]) goto userr; |
1341 |
sendfn = NULL; |
1342 |
if (iropt) { |
1343 |
CHECKARGC(1); |
1344 |
rcarg[nrcargs++] = iropt; |
1345 |
} |
1346 |
if (xrs) { |
1347 |
CHECKARGC(2); |
1348 |
rcarg[nrcargs++] = "-x"; |
1349 |
rcarg[nrcargs++] = xrs; |
1350 |
} |
1351 |
if (yrs) { |
1352 |
CHECKARGC(2); |
1353 |
rcarg[nrcargs++] = "-y"; |
1354 |
rcarg[nrcargs++] = yrs; |
1355 |
} |
1356 |
if (ldopt) { |
1357 |
CHECKARGC(1); |
1358 |
rcarg[nrcargs++] = ldopt; |
1359 |
} |
1360 |
if (sampcnt <= 0) sampcnt = 1; |
1361 |
} else { /* else in sampling mode */ |
1362 |
if (iropt) { |
1363 |
fputs(progname, stderr); |
1364 |
fputs(": -i, -I supported for pass-through only\n", stderr); |
1365 |
return(1); |
1366 |
} |
1367 |
fmtopt[2] = (sizeof(RREAL)==sizeof(double)) ? 'd' : 'f'; |
1368 |
if (sampcnt <= 0) sampcnt = 10000; |
1369 |
} |
1370 |
sprintf(sampcntbuf, "%d", sampcnt); |
1371 |
CHECKARGC(3); /* add our format & sample count */ |
1372 |
rcarg[nrcargs++] = fmtopt; |
1373 |
rcarg[nrcargs++] = "-c"; |
1374 |
rcarg[nrcargs++] = sampcntbuf; |
1375 |
/* add receiver arguments to rcontrib */ |
1376 |
if (load_scene(argv[a], add_recv_object) < 0) |
1377 |
return(1); |
1378 |
finish_receiver(); |
1379 |
if (sendfn == NULL) { /* pass-through mode? */ |
1380 |
CHECKARGC(1); /* add octree */ |
1381 |
rcarg[nrcargs++] = oconv_command(argc-a, argv+a); |
1382 |
rcarg[nrcargs] = NULL; |
1383 |
return(my_exec(rcarg)); /* rcontrib does everything */ |
1384 |
} |
1385 |
clear_params(&curparams, 0); /* else load sender surface & params */ |
1386 |
curmod[0] = '\0'; |
1387 |
if (load_scene(sendfn, add_send_object) < 0) |
1388 |
return(1); |
1389 |
if ((nsbins = prepare_sampler()) <= 0) |
1390 |
return(1); |
1391 |
CHECKARGC(3); /* add row count and octree */ |
1392 |
rcarg[nrcargs++] = "-y"; |
1393 |
sprintf(nsbinbuf, "%d", nsbins); |
1394 |
rcarg[nrcargs++] = nsbinbuf; |
1395 |
rcarg[nrcargs++] = oconv_command(argc-a, argv+a); |
1396 |
rcarg[nrcargs] = NULL; |
1397 |
/* open pipe to rcontrib process */ |
1398 |
if ((rcfp = popen_arglist(rcarg, "w")) == NULL) |
1399 |
return(1); |
1400 |
SET_FILE_BINARY(rcfp); |
1401 |
#ifdef getc_unlocked |
1402 |
flockfile(rcfp); |
1403 |
#endif |
1404 |
if (verbose > 0) { |
1405 |
fprintf(stderr, "%s: sampling %d directions", progname, nsbins); |
1406 |
if (curparams.nsurfs > 1) |
1407 |
fprintf(stderr, " (%d elements)\n", curparams.nsurfs); |
1408 |
else |
1409 |
fputc('\n', stderr); |
1410 |
} |
1411 |
for (i = 0; i < nsbins; i++) /* send rcontrib ray samples */ |
1412 |
if (!(*curparams.sample_basis)(&curparams, i, rcfp)) |
1413 |
return(1); |
1414 |
return(pclose(rcfp) < 0); /* all finished! */ |
1415 |
userr: |
1416 |
if (a < argc-2) |
1417 |
fprintf(stderr, "%s: unsupported option '%s'", progname, argv[a]); |
1418 |
fprintf(stderr, "Usage: %s [-v][rcontrib options] sender.rad receiver.rad [-i system.oct] [system.rad ..]\n", |
1419 |
progname); |
1420 |
return(1); |
1421 |
} |