1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rfluxmtx.c,v 2.42 2016/12/22 17:28:06 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 "paths.h" |
15 |
#include "bsdf.h" |
16 |
#include "bsdf_m.h" |
17 |
#include "random.h" |
18 |
#include "triangulate.h" |
19 |
#include "platform.h" |
20 |
|
21 |
#define MAXRCARG 512 |
22 |
|
23 |
char *progname; /* global argv[0] */ |
24 |
|
25 |
int verbose = 0; /* verbose mode (< 0 no warnings) */ |
26 |
|
27 |
char *rcarg[MAXRCARG+1] = {"rcontrib", "-fo+"}; |
28 |
int nrcargs = 2; |
29 |
|
30 |
const char overflowerr[] = "%s: too many arguments!\n"; |
31 |
|
32 |
#define CHECKARGC(n) if (nrcargs >= MAXRCARG-(n)) \ |
33 |
{ fprintf(stderr, overflowerr, progname); exit(1); } |
34 |
|
35 |
int sampcnt = 0; /* sample count (0==unset) */ |
36 |
|
37 |
char *reinhfn = "reinhartb.cal"; |
38 |
char *shirchiufn = "disk2square.cal"; |
39 |
char *kfullfn = "klems_full.cal"; |
40 |
char *khalffn = "klems_half.cal"; |
41 |
char *kquarterfn = "klems_quarter.cal"; |
42 |
|
43 |
/* string indicating parameters */ |
44 |
const char PARAMSTART[] = "@rfluxmtx"; |
45 |
|
46 |
/* surface type IDs */ |
47 |
#define ST_NONE 0 |
48 |
#define ST_POLY 1 |
49 |
#define ST_RING 2 |
50 |
#define ST_SOURCE 3 |
51 |
|
52 |
typedef struct surf_s { |
53 |
struct surf_s *next; /* next surface in list */ |
54 |
void *priv; /* private data (malloc'ed) */ |
55 |
char sname[32]; /* surface name */ |
56 |
FVECT snrm; /* surface normal */ |
57 |
double area; /* surface area / proj. solid angle */ |
58 |
short styp; /* surface type */ |
59 |
short nfargs; /* number of real arguments */ |
60 |
double farg[1]; /* real values (extends struct) */ |
61 |
} SURF; /* surface structure */ |
62 |
|
63 |
typedef struct { |
64 |
FVECT uva[2]; /* tangent axes */ |
65 |
int ntris; /* number of triangles */ |
66 |
struct ptri { |
67 |
double afrac; /* fraction of total area */ |
68 |
short vndx[3]; /* vertex indices */ |
69 |
} tri[1]; /* triangle array (extends struct) */ |
70 |
} POLYTRIS; /* triangulated polygon */ |
71 |
|
72 |
typedef struct param_s { |
73 |
char sign; /* '-' for axis reversal */ |
74 |
char hemis[31]; /* hemispherical sampling spec. */ |
75 |
int hsiz; /* hemisphere basis size */ |
76 |
int nsurfs; /* number of surfaces */ |
77 |
SURF *slist; /* list of surfaces */ |
78 |
FVECT vup; /* up vector (zero if unset) */ |
79 |
FVECT nrm; /* average normal direction */ |
80 |
FVECT udir, vdir; /* tangent axes */ |
81 |
char *outfn; /* output file name (receiver) */ |
82 |
int (*sample_basis)(struct param_s *p, int, FILE *); |
83 |
} PARAMS; /* sender/receiver parameters */ |
84 |
|
85 |
PARAMS curparams; |
86 |
char curmod[128]; |
87 |
char newparams[1024]; |
88 |
|
89 |
typedef int SURFSAMP(FVECT, SURF *, double); |
90 |
|
91 |
static SURFSAMP ssamp_bad, ssamp_poly, ssamp_ring; |
92 |
|
93 |
SURFSAMP *orig_in_surf[4] = { |
94 |
ssamp_bad, ssamp_poly, ssamp_ring, ssamp_bad |
95 |
}; |
96 |
|
97 |
/* Clear parameter set */ |
98 |
static void |
99 |
clear_params(PARAMS *p, int reset_only) |
100 |
{ |
101 |
while (p->slist != NULL) { |
102 |
SURF *sdel = p->slist; |
103 |
p->slist = sdel->next; |
104 |
if (sdel->priv != NULL) |
105 |
free(sdel->priv); |
106 |
free(sdel); |
107 |
} |
108 |
if (reset_only) { |
109 |
p->nsurfs = 0; |
110 |
memset(p->nrm, 0, sizeof(FVECT)); |
111 |
memset(p->vup, 0, sizeof(FVECT)); |
112 |
p->outfn = NULL; |
113 |
return; |
114 |
} |
115 |
memset(p, 0, sizeof(PARAMS)); |
116 |
} |
117 |
|
118 |
/* Get surface type from name */ |
119 |
static int |
120 |
surf_type(const char *otype) |
121 |
{ |
122 |
if (!strcmp(otype, "polygon")) |
123 |
return(ST_POLY); |
124 |
if (!strcmp(otype, "ring")) |
125 |
return(ST_RING); |
126 |
if (!strcmp(otype, "source")) |
127 |
return(ST_SOURCE); |
128 |
return(ST_NONE); |
129 |
} |
130 |
|
131 |
/* Add arguments to oconv command */ |
132 |
static char * |
133 |
oconv_command(int ac, char *av[]) |
134 |
{ |
135 |
static char oconvbuf[2048] = "!oconv -f "; |
136 |
char *cp = oconvbuf + 10; |
137 |
char *recv = *av++; |
138 |
|
139 |
if (ac-- <= 0) |
140 |
return(NULL); |
141 |
if (verbose < 0) { /* turn off warnings */ |
142 |
strcpy(cp, "-w- "); |
143 |
cp += 4; |
144 |
} |
145 |
while (ac-- > 0) { |
146 |
strcpy(cp, *av++); |
147 |
while (*cp) cp++; |
148 |
*cp++ = ' '; |
149 |
if (cp >= oconvbuf+(sizeof(oconvbuf)-32)) |
150 |
goto overrun; |
151 |
} |
152 |
/* receiver goes last */ |
153 |
if (matchany(recv, SPECIALS)) { |
154 |
*cp++ = QUOTCHAR; |
155 |
while (*recv) { |
156 |
if (cp >= oconvbuf+(sizeof(oconvbuf)-3)) |
157 |
goto overrun; |
158 |
*cp++ = *recv++; |
159 |
} |
160 |
*cp++ = QUOTCHAR; |
161 |
*cp = '\0'; |
162 |
} else |
163 |
strcpy(cp, recv); |
164 |
return(oconvbuf); |
165 |
overrun: |
166 |
fputs(progname, stderr); |
167 |
fputs(": too many file arguments!\n", stderr); |
168 |
exit(1); |
169 |
} |
170 |
|
171 |
/* Open a pipe to/from a command given as an argument list */ |
172 |
static FILE * |
173 |
popen_arglist(char *av[], char *mode) |
174 |
{ |
175 |
char cmd[10240]; |
176 |
|
177 |
if (!convert_commandline(cmd, sizeof(cmd), av)) { |
178 |
fputs(progname, stderr); |
179 |
fputs(": command line too long in popen_arglist()\n", stderr); |
180 |
return(NULL); |
181 |
} |
182 |
if (verbose > 0) |
183 |
fprintf(stderr, "%s: opening pipe %s: %s\n", |
184 |
progname, (*mode=='w') ? "to" : "from", cmd); |
185 |
return(popen(cmd, mode)); |
186 |
} |
187 |
|
188 |
#if defined(_WIN32) || defined(_WIN64) |
189 |
/* Execute system command (Windows version) */ |
190 |
static int |
191 |
my_exec(char *av[]) |
192 |
{ |
193 |
char cmd[10240]; |
194 |
|
195 |
if (!convert_commandline(cmd, sizeof(cmd), av)) { |
196 |
fputs(progname, stderr); |
197 |
fputs(": command line too long in my_exec()\n", stderr); |
198 |
return(1); |
199 |
} |
200 |
if (verbose > 0) |
201 |
fprintf(stderr, "%s: running: %s\n", progname, cmd); |
202 |
return(system(cmd)); |
203 |
} |
204 |
#else |
205 |
/* Execute system command in our stead (Unix version) */ |
206 |
static int |
207 |
my_exec(char *av[]) |
208 |
{ |
209 |
char *compath; |
210 |
|
211 |
if ((compath = getpath((char *)av[0], getenv("PATH"), X_OK)) == NULL) { |
212 |
fprintf(stderr, "%s: cannot locate %s\n", progname, av[0]); |
213 |
return(1); |
214 |
} |
215 |
if (verbose > 0) { |
216 |
char cmd[4096]; |
217 |
if (!convert_commandline(cmd, sizeof(cmd), av)) |
218 |
strcpy(cmd, "COMMAND TOO LONG TO SHOW"); |
219 |
fprintf(stderr, "%s: running: %s\n", progname, cmd); |
220 |
} |
221 |
execv(compath, av); /* successful call never returns */ |
222 |
perror(compath); |
223 |
return(1); |
224 |
} |
225 |
#endif |
226 |
|
227 |
/* Get normalized direction vector from string specification */ |
228 |
static int |
229 |
get_direction(FVECT dv, const char *s) |
230 |
{ |
231 |
int sign = 1; |
232 |
int axis = 0; |
233 |
|
234 |
memset(dv, 0, sizeof(FVECT)); |
235 |
nextchar: |
236 |
switch (*s) { |
237 |
case '+': |
238 |
++s; |
239 |
goto nextchar; |
240 |
case '-': |
241 |
sign = -sign; |
242 |
++s; |
243 |
goto nextchar; |
244 |
case 'z': |
245 |
case 'Z': |
246 |
++axis; |
247 |
case 'y': |
248 |
case 'Y': |
249 |
++axis; |
250 |
case 'x': |
251 |
case 'X': |
252 |
dv[axis] = sign; |
253 |
return(!s[1] | isspace(s[1])); |
254 |
default: |
255 |
break; |
256 |
} |
257 |
#ifdef SMLFLT |
258 |
if (sscanf(s, "%f,%f,%f", &dv[0], &dv[1], &dv[2]) != 3) |
259 |
#else |
260 |
if (sscanf(s, "%lf,%lf,%lf", &dv[0], &dv[1], &dv[2]) != 3) |
261 |
#endif |
262 |
return(0); |
263 |
dv[0] *= (RREAL)sign; |
264 |
return(normalize(dv) > 0); |
265 |
} |
266 |
|
267 |
/* Parse program parameters (directives) */ |
268 |
static int |
269 |
parse_params(PARAMS *p, char *pargs) |
270 |
{ |
271 |
char *cp = pargs; |
272 |
int nparams = 0; |
273 |
int quot; |
274 |
int i; |
275 |
|
276 |
for ( ; ; ) { |
277 |
switch (*cp++) { |
278 |
case 'h': |
279 |
if (*cp++ != '=') |
280 |
break; |
281 |
if ((*cp == '+') | (*cp == '-')) |
282 |
p->sign = *cp++; |
283 |
else |
284 |
p->sign = '+'; |
285 |
p->hsiz = 0; |
286 |
i = 0; |
287 |
while (*cp && !isspace(*cp)) { |
288 |
if (isdigit(*cp)) |
289 |
p->hsiz = 10*p->hsiz + *cp - '0'; |
290 |
p->hemis[i++] = *cp++; |
291 |
} |
292 |
if (!i) |
293 |
break; |
294 |
p->hemis[i] = '\0'; |
295 |
p->hsiz += !p->hsiz; |
296 |
++nparams; |
297 |
continue; |
298 |
case 'u': |
299 |
if (*cp++ != '=') |
300 |
break; |
301 |
if (!get_direction(p->vup, cp)) |
302 |
break; |
303 |
while (*cp && !isspace(*cp++)) |
304 |
; |
305 |
++nparams; |
306 |
continue; |
307 |
case 'o': |
308 |
if (*cp++ != '=') |
309 |
break; |
310 |
quot = 0; |
311 |
if ((*cp == '"') | (*cp == '\'')) |
312 |
quot = *cp++; |
313 |
i = 0; |
314 |
while (*cp && (quot ? (*cp != quot) : !isspace(*cp))) { |
315 |
i++; cp++; |
316 |
} |
317 |
if (!i) |
318 |
break; |
319 |
if (!*cp) { |
320 |
if (quot) |
321 |
break; |
322 |
cp[1] = '\0'; |
323 |
} |
324 |
*cp = '\0'; |
325 |
p->outfn = savqstr(cp-i); |
326 |
*cp++ = quot ? quot : ' '; |
327 |
++nparams; |
328 |
continue; |
329 |
case ' ': |
330 |
case '\t': |
331 |
case '\r': |
332 |
case '\n': |
333 |
continue; |
334 |
case '\0': |
335 |
return(nparams); |
336 |
default: |
337 |
break; |
338 |
} |
339 |
break; |
340 |
} |
341 |
fprintf(stderr, "%s: bad parameter string: %s", progname, pargs); |
342 |
exit(1); |
343 |
return(-1); /* pro forma return */ |
344 |
} |
345 |
|
346 |
/* Add receiver arguments (directives) corresponding to the current modifier */ |
347 |
static void |
348 |
finish_receiver(void) |
349 |
{ |
350 |
char sbuf[256]; |
351 |
int uniform = 0; |
352 |
char *calfn = NULL; |
353 |
char *params = NULL; |
354 |
char *binv = NULL; |
355 |
char *binf = NULL; |
356 |
char *nbins = NULL; |
357 |
|
358 |
if (!curmod[0]) { |
359 |
fputs(progname, stderr); |
360 |
fputs(": missing receiver surface!\n", stderr); |
361 |
exit(1); |
362 |
} |
363 |
if (curparams.outfn != NULL) { /* add output file spec. */ |
364 |
CHECKARGC(2); |
365 |
rcarg[nrcargs++] = "-o"; |
366 |
rcarg[nrcargs++] = curparams.outfn; |
367 |
} |
368 |
/* check arguments */ |
369 |
if (!curparams.hemis[0]) { |
370 |
fputs(progname, stderr); |
371 |
fputs(": missing hemisphere sampling type!\n", stderr); |
372 |
exit(1); |
373 |
} |
374 |
if (normalize(curparams.nrm) == 0) { |
375 |
fputs(progname, stderr); |
376 |
fputs(": undefined normal for hemisphere sampling\n", stderr); |
377 |
exit(1); |
378 |
} |
379 |
if (normalize(curparams.vup) == 0) { |
380 |
if (fabs(curparams.nrm[2]) < .7) |
381 |
curparams.vup[2] = 1; |
382 |
else |
383 |
curparams.vup[1] = 1; |
384 |
} |
385 |
/* determine sample type/bin */ |
386 |
if (tolower(curparams.hemis[0]) == 'u' | curparams.hemis[0] == '1') { |
387 |
sprintf(sbuf, "if(-Dx*%g-Dy*%g-Dz*%g,0,-1)", |
388 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2]); |
389 |
binv = savqstr(sbuf); |
390 |
nbins = "1"; /* uniform sampling -- one bin */ |
391 |
uniform = 1; |
392 |
} else if (tolower(curparams.hemis[0]) == 's' && |
393 |
tolower(curparams.hemis[1]) == 'c') { |
394 |
/* assign parameters */ |
395 |
if (curparams.hsiz <= 1) { |
396 |
fputs(progname, stderr); |
397 |
fputs(": missing size for Shirley-Chiu sampling!\n", stderr); |
398 |
exit(1); |
399 |
} |
400 |
calfn = shirchiufn; shirchiufn = NULL; |
401 |
sprintf(sbuf, "SCdim=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g,RHS=%c1", |
402 |
curparams.hsiz, |
403 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
404 |
curparams.vup[0], curparams.vup[1], curparams.vup[2], |
405 |
curparams.sign); |
406 |
params = savqstr(sbuf); |
407 |
binv = "scbin"; |
408 |
nbins = "SCdim*SCdim"; |
409 |
} else if ((tolower(curparams.hemis[0]) == 'r') | |
410 |
(tolower(curparams.hemis[0]) == 't')) { |
411 |
calfn = reinhfn; reinhfn = NULL; |
412 |
sprintf(sbuf, "MF=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g,RHS=%c1", |
413 |
curparams.hsiz, |
414 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
415 |
curparams.vup[0], curparams.vup[1], curparams.vup[2], |
416 |
curparams.sign); |
417 |
params = savqstr(sbuf); |
418 |
binv = "rbin"; |
419 |
nbins = "Nrbins"; |
420 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
421 |
!curparams.hemis[1] | |
422 |
(tolower(curparams.hemis[1]) == 'f') | |
423 |
(curparams.hemis[1] == '1')) { |
424 |
calfn = kfullfn; kfullfn = NULL; |
425 |
binf = "kbin"; |
426 |
nbins = "Nkbins"; |
427 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
428 |
(tolower(curparams.hemis[1]) == 'h') | |
429 |
(curparams.hemis[1] == '2')) { |
430 |
calfn = khalffn; khalffn = NULL; |
431 |
binf = "khbin"; |
432 |
nbins = "Nkhbins"; |
433 |
} else if (tolower(curparams.hemis[0]) == 'k' && |
434 |
(tolower(curparams.hemis[1]) == 'q') | |
435 |
(curparams.hemis[1] == '4')) { |
436 |
calfn = kquarterfn; kquarterfn = NULL; |
437 |
binf = "kqbin"; |
438 |
nbins = "Nkqbins"; |
439 |
} else { |
440 |
fprintf(stderr, "%s: unrecognized hemisphere sampling: h=%s\n", |
441 |
progname, curparams.hemis); |
442 |
exit(1); |
443 |
} |
444 |
if (tolower(curparams.hemis[0]) == 'k') { |
445 |
sprintf(sbuf, "RHS=%c1", curparams.sign); |
446 |
params = savqstr(sbuf); |
447 |
} |
448 |
if (!uniform & (curparams.slist->styp == ST_SOURCE)) { |
449 |
SURF *sp; |
450 |
for (sp = curparams.slist; sp != NULL; sp = sp->next) |
451 |
if (fabs(sp->area - PI) > 1e-3) { |
452 |
fprintf(stderr, "%s: source '%s' must be 180-degrees\n", |
453 |
progname, sp->sname); |
454 |
exit(1); |
455 |
} |
456 |
} |
457 |
if (calfn != NULL) { /* add cal file if needed */ |
458 |
CHECKARGC(2); |
459 |
rcarg[nrcargs++] = "-f"; |
460 |
rcarg[nrcargs++] = calfn; |
461 |
} |
462 |
if (params != NULL) { /* parameters _after_ cal file */ |
463 |
CHECKARGC(2); |
464 |
rcarg[nrcargs++] = "-p"; |
465 |
rcarg[nrcargs++] = params; |
466 |
} |
467 |
if (nbins != NULL) { /* add #bins if set */ |
468 |
CHECKARGC(2); |
469 |
rcarg[nrcargs++] = "-bn"; |
470 |
rcarg[nrcargs++] = nbins; |
471 |
} |
472 |
if (binv != NULL) { |
473 |
CHECKARGC(2); /* assign bin variable */ |
474 |
rcarg[nrcargs++] = "-b"; |
475 |
rcarg[nrcargs++] = binv; |
476 |
} else if (binf != NULL) { |
477 |
CHECKARGC(2); /* assign bin function */ |
478 |
rcarg[nrcargs++] = "-b"; |
479 |
sprintf(sbuf, "%s(%g,%g,%g,%g,%g,%g)", binf, |
480 |
curparams.nrm[0], curparams.nrm[1], curparams.nrm[2], |
481 |
curparams.vup[0], curparams.vup[1], curparams.vup[2]); |
482 |
rcarg[nrcargs++] = savqstr(sbuf); |
483 |
} |
484 |
CHECKARGC(2); /* modifier argument goes last */ |
485 |
rcarg[nrcargs++] = "-m"; |
486 |
rcarg[nrcargs++] = savqstr(curmod); |
487 |
} |
488 |
|
489 |
/* Make randomly oriented tangent plane axes for given normal direction */ |
490 |
static void |
491 |
make_axes(FVECT uva[2], const FVECT nrm) |
492 |
{ |
493 |
int i; |
494 |
|
495 |
if (!getperpendicular(uva[0], nrm, 1)) { |
496 |
fputs(progname, stderr); |
497 |
fputs(": bad surface normal in make_axes!\n", stderr); |
498 |
exit(1); |
499 |
} |
500 |
fcross(uva[1], nrm, uva[0]); |
501 |
} |
502 |
|
503 |
/* Illegal sender surfaces end up here */ |
504 |
static int |
505 |
ssamp_bad(FVECT orig, SURF *sp, double x) |
506 |
{ |
507 |
fprintf(stderr, "%s: illegal sender surface '%s'\n", |
508 |
progname, sp->sname); |
509 |
return(0); |
510 |
} |
511 |
|
512 |
/* Generate origin on ring surface from uniform random variable */ |
513 |
static int |
514 |
ssamp_ring(FVECT orig, SURF *sp, double x) |
515 |
{ |
516 |
FVECT *uva = (FVECT *)sp->priv; |
517 |
double samp2[2]; |
518 |
double uv[2]; |
519 |
int i; |
520 |
|
521 |
if (uva == NULL) { /* need tangent axes */ |
522 |
uva = (FVECT *)malloc(sizeof(FVECT)*2); |
523 |
if (uva == NULL) { |
524 |
fputs(progname, stderr); |
525 |
fputs(": out of memory in ssamp_ring!\n", stderr); |
526 |
return(0); |
527 |
} |
528 |
make_axes(uva, sp->snrm); |
529 |
sp->priv = (void *)uva; |
530 |
} |
531 |
SDmultiSamp(samp2, 2, x); |
532 |
samp2[0] = sqrt(samp2[0]*sp->area*(1./PI) + sp->farg[6]*sp->farg[6]); |
533 |
samp2[1] *= 2.*PI; |
534 |
uv[0] = samp2[0]*tcos(samp2[1]); |
535 |
uv[1] = samp2[0]*tsin(samp2[1]); |
536 |
for (i = 3; i--; ) |
537 |
orig[i] = sp->farg[i] + uv[0]*uva[0][i] + uv[1]*uva[1][i]; |
538 |
return(1); |
539 |
} |
540 |
|
541 |
/* Add triangle to polygon's list (call-back function) */ |
542 |
static int |
543 |
add_triangle(const Vert2_list *tp, int a, int b, int c) |
544 |
{ |
545 |
POLYTRIS *ptp = (POLYTRIS *)tp->p; |
546 |
struct ptri *trip = ptp->tri + ptp->ntris++; |
547 |
|
548 |
trip->vndx[0] = a; |
549 |
trip->vndx[1] = b; |
550 |
trip->vndx[2] = c; |
551 |
return(1); |
552 |
} |
553 |
|
554 |
/* Generate origin on polygon surface from uniform random variable */ |
555 |
static int |
556 |
ssamp_poly(FVECT orig, SURF *sp, double x) |
557 |
{ |
558 |
POLYTRIS *ptp = (POLYTRIS *)sp->priv; |
559 |
double samp2[2]; |
560 |
double *v0, *v1, *v2; |
561 |
int i; |
562 |
|
563 |
if (ptp == NULL) { /* need to triangulate */ |
564 |
ptp = (POLYTRIS *)malloc(sizeof(POLYTRIS) + |
565 |
sizeof(struct ptri)*(sp->nfargs/3 - 3)); |
566 |
if (ptp == NULL) |
567 |
goto memerr; |
568 |
if (sp->nfargs == 3) { /* simple case */ |
569 |
ptp->ntris = 1; |
570 |
ptp->tri[0].vndx[0] = 0; |
571 |
ptp->tri[0].vndx[1] = 1; |
572 |
ptp->tri[0].vndx[2] = 2; |
573 |
ptp->tri[0].afrac = 1; |
574 |
} else { |
575 |
Vert2_list *v2l = polyAlloc(sp->nfargs/3); |
576 |
if (v2l == NULL) |
577 |
goto memerr; |
578 |
make_axes(ptp->uva, sp->snrm); |
579 |
for (i = v2l->nv; i--; ) { |
580 |
v2l->v[i].mX = DOT(sp->farg+3*i, ptp->uva[0]); |
581 |
v2l->v[i].mY = DOT(sp->farg+3*i, ptp->uva[1]); |
582 |
} |
583 |
ptp->ntris = 0; |
584 |
v2l->p = (void *)ptp; |
585 |
if (!polyTriangulate(v2l, add_triangle)) { |
586 |
fprintf(stderr, |
587 |
"%s: cannot triangulate polygon '%s'\n", |
588 |
progname, sp->sname); |
589 |
return(0); |
590 |
} |
591 |
for (i = ptp->ntris; i--; ) { |
592 |
int a = ptp->tri[i].vndx[0]; |
593 |
int b = ptp->tri[i].vndx[1]; |
594 |
int c = ptp->tri[i].vndx[2]; |
595 |
ptp->tri[i].afrac = |
596 |
(v2l->v[a].mX*v2l->v[b].mY - |
597 |
v2l->v[b].mX*v2l->v[a].mY + |
598 |
v2l->v[b].mX*v2l->v[c].mY - |
599 |
v2l->v[c].mX*v2l->v[b].mY + |
600 |
v2l->v[c].mX*v2l->v[a].mY - |
601 |
v2l->v[a].mX*v2l->v[c].mY) / |
602 |
(2.*sp->area); |
603 |
} |
604 |
polyFree(v2l); |
605 |
} |
606 |
sp->priv = (void *)ptp; |
607 |
} |
608 |
/* pick triangle by partial area */ |
609 |
for (i = 0; i < ptp->ntris-1 && x > ptp->tri[i].afrac; i++) |
610 |
x -= ptp->tri[i].afrac; |
611 |
SDmultiSamp(samp2, 2, x/ptp->tri[i].afrac); |
612 |
samp2[0] *= samp2[1] = sqrt(samp2[1]); |
613 |
samp2[1] = 1. - samp2[1]; |
614 |
v0 = sp->farg + 3*ptp->tri[i].vndx[0]; |
615 |
v1 = sp->farg + 3*ptp->tri[i].vndx[1]; |
616 |
v2 = sp->farg + 3*ptp->tri[i].vndx[2]; |
617 |
for (i = 3; i--; ) |
618 |
orig[i] = v0[i] + samp2[0]*(v1[i] - v0[i]) |
619 |
+ samp2[1]*(v2[i] - v0[i]) ; |
620 |
return(1); |
621 |
memerr: |
622 |
fputs(progname, stderr); |
623 |
fputs(": out of memory in ssamp_poly!\n", stderr); |
624 |
return(0); |
625 |
} |
626 |
|
627 |
/* Compute sample origin based on projected areas of sender subsurfaces */ |
628 |
static int |
629 |
sample_origin(PARAMS *p, FVECT orig, const FVECT rdir, double x) |
630 |
{ |
631 |
static double *projsa; |
632 |
static int nall; |
633 |
double tarea = 0; |
634 |
int i; |
635 |
SURF *sp; |
636 |
/* special case for lone surface */ |
637 |
if (p->nsurfs == 1) { |
638 |
sp = p->slist; |
639 |
if (DOT(sp->snrm, rdir) >= FTINY) { |
640 |
fprintf(stderr, |
641 |
"%s: internal - sample behind sender '%s'\n", |
642 |
progname, sp->sname); |
643 |
return(0); |
644 |
} |
645 |
return((*orig_in_surf[sp->styp])(orig, sp, x)); |
646 |
} |
647 |
if (p->nsurfs > nall) { /* (re)allocate surface area cache */ |
648 |
if (projsa) free(projsa); |
649 |
projsa = (double *)malloc(sizeof(double)*p->nsurfs); |
650 |
if (projsa == NULL) { |
651 |
fputs(progname, stderr); |
652 |
fputs(": out of memory in sample_origin!\n", stderr); |
653 |
exit(1); |
654 |
} |
655 |
nall = p->nsurfs; |
656 |
} |
657 |
/* compute projected areas */ |
658 |
for (i = 0, sp = p->slist; sp != NULL; i++, sp = sp->next) { |
659 |
projsa[i] = -DOT(sp->snrm, rdir) * sp->area; |
660 |
tarea += projsa[i] *= (double)(projsa[i] > FTINY); |
661 |
} |
662 |
if (tarea <= FTINY) { /* wrong side of sender? */ |
663 |
fputs(progname, stderr); |
664 |
fputs(": internal - sample behind all sender elements!\n", |
665 |
stderr); |
666 |
return(0); |
667 |
} |
668 |
tarea *= x; /* get surface from list */ |
669 |
for (i = 0, sp = p->slist; tarea > projsa[i]; sp = sp->next) |
670 |
tarea -= projsa[i++]; |
671 |
return((*orig_in_surf[sp->styp])(orig, sp, tarea/projsa[i])); |
672 |
} |
673 |
|
674 |
/* Uniform sample generator */ |
675 |
static int |
676 |
sample_uniform(PARAMS *p, int b, FILE *fp) |
677 |
{ |
678 |
int n = sampcnt; |
679 |
double samp3[3]; |
680 |
double duvw[3]; |
681 |
FVECT orig_dir[2]; |
682 |
int i; |
683 |
|
684 |
if (fp == NULL) /* just requesting number of bins? */ |
685 |
return(1); |
686 |
|
687 |
while (n--) { /* stratified hemisphere sampling */ |
688 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
689 |
SDsquare2disk(duvw, samp3[1], samp3[2]); |
690 |
duvw[2] = -sqrt(1. - duvw[0]*duvw[0] - duvw[1]*duvw[1]); |
691 |
for (i = 3; i--; ) |
692 |
orig_dir[1][i] = duvw[0]*p->udir[i] + |
693 |
duvw[1]*p->vdir[i] + |
694 |
duvw[2]*p->nrm[i] ; |
695 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0])) |
696 |
return(0); |
697 |
if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2) |
698 |
return(0); |
699 |
} |
700 |
return(1); |
701 |
} |
702 |
|
703 |
/* Shirly-Chiu sample generator */ |
704 |
static int |
705 |
sample_shirchiu(PARAMS *p, int b, FILE *fp) |
706 |
{ |
707 |
int n = sampcnt; |
708 |
double samp3[3]; |
709 |
double duvw[3]; |
710 |
FVECT orig_dir[2]; |
711 |
int i; |
712 |
|
713 |
if (fp == NULL) /* just requesting number of bins? */ |
714 |
return(p->hsiz*p->hsiz); |
715 |
|
716 |
while (n--) { /* stratified sampling */ |
717 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
718 |
SDsquare2disk(duvw, (b/p->hsiz + samp3[1])/curparams.hsiz, |
719 |
(b%p->hsiz + samp3[2])/curparams.hsiz); |
720 |
duvw[2] = sqrt(1. - duvw[0]*duvw[0] - duvw[1]*duvw[1]); |
721 |
for (i = 3; i--; ) |
722 |
orig_dir[1][i] = -duvw[0]*p->udir[i] - |
723 |
duvw[1]*p->vdir[i] - |
724 |
duvw[2]*p->nrm[i] ; |
725 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0])) |
726 |
return(0); |
727 |
if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2) |
728 |
return(0); |
729 |
} |
730 |
return(1); |
731 |
} |
732 |
|
733 |
/* Reinhart/Tregenza sample generator */ |
734 |
static int |
735 |
sample_reinhart(PARAMS *p, int b, FILE *fp) |
736 |
{ |
737 |
#define T_NALT 7 |
738 |
static const int tnaz[T_NALT] = {30, 30, 24, 24, 18, 12, 6}; |
739 |
const int RowMax = T_NALT*p->hsiz + 1; |
740 |
const double RAH = (.5*PI)/(RowMax-.5); |
741 |
#define rnaz(r) (r >= RowMax-1 ? 1 : p->hsiz*tnaz[r/p->hsiz]) |
742 |
int n = sampcnt; |
743 |
int row, col; |
744 |
double samp3[3]; |
745 |
double alt, azi; |
746 |
double duvw[3]; |
747 |
FVECT orig_dir[2]; |
748 |
int i; |
749 |
|
750 |
if (fp == NULL) { /* just requesting number of bins? */ |
751 |
n = 0; |
752 |
for (row = RowMax; row--; ) n += rnaz(row); |
753 |
return(n); |
754 |
} |
755 |
row = 0; /* identify row & column */ |
756 |
col = b; |
757 |
while (col >= rnaz(row)) { |
758 |
col -= rnaz(row); |
759 |
++row; |
760 |
} |
761 |
while (n--) { /* stratified sampling */ |
762 |
SDmultiSamp(samp3, 3, (n+frandom())/sampcnt); |
763 |
alt = (row+samp3[1])*RAH; |
764 |
azi = (2.*PI)*(col+samp3[2]-.5)/rnaz(row); |
765 |
duvw[2] = cos(alt); /* measured from horizon */ |
766 |
duvw[0] = tsin(azi)*duvw[2]; |
767 |
duvw[1] = tcos(azi)*duvw[2]; |
768 |
duvw[2] = sqrt(1. - duvw[2]*duvw[2]); |
769 |
for (i = 3; i--; ) |
770 |
orig_dir[1][i] = -duvw[0]*p->udir[i] - |
771 |
duvw[1]*p->vdir[i] - |
772 |
duvw[2]*p->nrm[i] ; |
773 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0])) |
774 |
return(0); |
775 |
if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2) |
776 |
return(0); |
777 |
} |
778 |
return(1); |
779 |
#undef rnaz |
780 |
#undef T_NALT |
781 |
} |
782 |
|
783 |
/* Klems sample generator */ |
784 |
static int |
785 |
sample_klems(PARAMS *p, int b, FILE *fp) |
786 |
{ |
787 |
static const char bname[4][20] = { |
788 |
"LBNL/Klems Full", |
789 |
"LBNL/Klems Half", |
790 |
"INTERNAL ERROR", |
791 |
"LBNL/Klems Quarter" |
792 |
}; |
793 |
static ANGLE_BASIS *kbasis[4]; |
794 |
const int bi = p->hemis[1] - '1'; |
795 |
int n = sampcnt; |
796 |
double samp2[2]; |
797 |
double duvw[3]; |
798 |
FVECT orig_dir[2]; |
799 |
int i; |
800 |
|
801 |
if (!kbasis[bi]) { /* need to get basis, first */ |
802 |
for (i = 4; i--; ) |
803 |
if (!strcasecmp(abase_list[i].name, bname[bi])) { |
804 |
kbasis[bi] = &abase_list[i]; |
805 |
break; |
806 |
} |
807 |
if (i < 0) { |
808 |
fprintf(stderr, "%s: unknown hemisphere basis '%s'\n", |
809 |
progname, bname[bi]); |
810 |
return(0); |
811 |
} |
812 |
} |
813 |
if (fp == NULL) /* just requesting number of bins? */ |
814 |
return(kbasis[bi]->nangles); |
815 |
|
816 |
while (n--) { /* stratified sampling */ |
817 |
SDmultiSamp(samp2, 2, (n+frandom())/sampcnt); |
818 |
if (!fo_getvec(duvw, b+samp2[1], kbasis[bi])) |
819 |
return(0); |
820 |
for (i = 3; i--; ) |
821 |
orig_dir[1][i] = -duvw[0]*p->udir[i] - |
822 |
duvw[1]*p->vdir[i] - |
823 |
duvw[2]*p->nrm[i] ; |
824 |
if (!sample_origin(p, orig_dir[0], orig_dir[1], samp2[0])) |
825 |
return(0); |
826 |
if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2) |
827 |
return(0); |
828 |
} |
829 |
return(1); |
830 |
} |
831 |
|
832 |
/* Prepare hemisphere basis sampler that will send rays to rcontrib */ |
833 |
static int |
834 |
prepare_sampler(void) |
835 |
{ |
836 |
if (curparams.slist == NULL) { /* missing sample surface! */ |
837 |
fputs(progname, stderr); |
838 |
fputs(": no sender surface!\n", stderr); |
839 |
return(-1); |
840 |
} |
841 |
/* misplaced output file spec. */ |
842 |
if ((curparams.outfn != NULL) & (verbose >= 0)) |
843 |
fprintf(stderr, "%s: warning - ignoring output file in sender ('%s')\n", |
844 |
progname, curparams.outfn); |
845 |
/* check/set basis hemisphere */ |
846 |
if (!curparams.hemis[0]) { |
847 |
fputs(progname, stderr); |
848 |
fputs(": missing sender sampling type!\n", stderr); |
849 |
return(-1); |
850 |
} |
851 |
if (normalize(curparams.nrm) == 0) { |
852 |
fputs(progname, stderr); |
853 |
fputs(": undefined normal for sender sampling\n", stderr); |
854 |
return(-1); |
855 |
} |
856 |
if (normalize(curparams.vup) == 0) { |
857 |
if (fabs(curparams.nrm[2]) < .7) |
858 |
curparams.vup[2] = 1; |
859 |
else |
860 |
curparams.vup[1] = 1; |
861 |
} |
862 |
fcross(curparams.udir, curparams.vup, curparams.nrm); |
863 |
if (normalize(curparams.udir) == 0) { |
864 |
fputs(progname, stderr); |
865 |
fputs(": up vector coincides with sender normal\n", stderr); |
866 |
return(-1); |
867 |
} |
868 |
fcross(curparams.vdir, curparams.nrm, curparams.udir); |
869 |
if (curparams.sign == '-') { /* left-handed coordinate system? */ |
870 |
curparams.udir[0] *= -1.; |
871 |
curparams.udir[1] *= -1.; |
872 |
curparams.udir[2] *= -1.; |
873 |
} |
874 |
if (tolower(curparams.hemis[0]) == 'u' | curparams.hemis[0] == '1') |
875 |
curparams.sample_basis = sample_uniform; |
876 |
else if (tolower(curparams.hemis[0]) == 's' && |
877 |
tolower(curparams.hemis[1]) == 'c') |
878 |
curparams.sample_basis = sample_shirchiu; |
879 |
else if ((tolower(curparams.hemis[0]) == 'r') | |
880 |
(tolower(curparams.hemis[0]) == 't')) |
881 |
curparams.sample_basis = sample_reinhart; |
882 |
else if (tolower(curparams.hemis[0]) == 'k') { |
883 |
switch (curparams.hemis[1]) { |
884 |
case '1': |
885 |
case '2': |
886 |
case '4': |
887 |
break; |
888 |
case 'f': |
889 |
case 'F': |
890 |
case '\0': |
891 |
curparams.hemis[1] = '1'; |
892 |
break; |
893 |
case 'h': |
894 |
case 'H': |
895 |
curparams.hemis[1] = '2'; |
896 |
break; |
897 |
case 'q': |
898 |
case 'Q': |
899 |
curparams.hemis[1] = '4'; |
900 |
break; |
901 |
default: |
902 |
goto unrecognized; |
903 |
} |
904 |
curparams.hemis[2] = '\0'; |
905 |
curparams.sample_basis = sample_klems; |
906 |
} else |
907 |
goto unrecognized; |
908 |
/* return number of bins */ |
909 |
return((*curparams.sample_basis)(&curparams,0,NULL)); |
910 |
unrecognized: |
911 |
fprintf(stderr, "%s: unrecognized sender sampling: h=%s\n", |
912 |
progname, curparams.hemis); |
913 |
return(-1); |
914 |
} |
915 |
|
916 |
/* Compute normal and area for polygon */ |
917 |
static int |
918 |
finish_polygon(SURF *p) |
919 |
{ |
920 |
const int nv = p->nfargs / 3; |
921 |
FVECT e1, e2, vc; |
922 |
int i; |
923 |
|
924 |
memset(p->snrm, 0, sizeof(FVECT)); |
925 |
VSUB(e1, p->farg+3, p->farg); |
926 |
for (i = 2; i < nv; i++) { |
927 |
VSUB(e2, p->farg+3*i, p->farg); |
928 |
VCROSS(vc, e1, e2); |
929 |
p->snrm[0] += vc[0]; |
930 |
p->snrm[1] += vc[1]; |
931 |
p->snrm[2] += vc[2]; |
932 |
VCOPY(e1, e2); |
933 |
} |
934 |
p->area = normalize(p->snrm)*0.5; |
935 |
return(p->area > FTINY); |
936 |
} |
937 |
|
938 |
/* Add a surface to our current parameters */ |
939 |
static void |
940 |
add_surface(int st, const char *oname, FILE *fp) |
941 |
{ |
942 |
SURF *snew; |
943 |
int n; |
944 |
/* get floating-point arguments */ |
945 |
if (!fscanf(fp, "%d", &n)) return; |
946 |
while (n-- > 0) fscanf(fp, "%*s"); |
947 |
if (!fscanf(fp, "%d", &n)) return; |
948 |
while (n-- > 0) fscanf(fp, "%*d"); |
949 |
if (!fscanf(fp, "%d", &n) || n <= 0) return; |
950 |
snew = (SURF *)malloc(sizeof(SURF) + sizeof(double)*(n-1)); |
951 |
if (snew == NULL) { |
952 |
fputs(progname, stderr); |
953 |
fputs(": out of memory in add_surface!\n", stderr); |
954 |
exit(1); |
955 |
} |
956 |
strncpy(snew->sname, oname, sizeof(snew->sname)-1); |
957 |
snew->sname[sizeof(snew->sname)-1] = '\0'; |
958 |
snew->styp = st; |
959 |
snew->priv = NULL; |
960 |
snew->nfargs = n; |
961 |
for (n = 0; n < snew->nfargs; n++) |
962 |
if (fscanf(fp, "%lf", &snew->farg[n]) != 1) { |
963 |
fprintf(stderr, "%s: error reading arguments for '%s'\n", |
964 |
progname, oname); |
965 |
exit(1); |
966 |
} |
967 |
switch (st) { |
968 |
case ST_RING: |
969 |
if (snew->nfargs != 8) |
970 |
goto badcount; |
971 |
VCOPY(snew->snrm, snew->farg+3); |
972 |
if (normalize(snew->snrm) == 0) |
973 |
goto badnorm; |
974 |
if (snew->farg[7] < snew->farg[6]) { |
975 |
double t = snew->farg[7]; |
976 |
snew->farg[7] = snew->farg[6]; |
977 |
snew->farg[6] = t; |
978 |
} |
979 |
snew->area = PI*(snew->farg[7]*snew->farg[7] - |
980 |
snew->farg[6]*snew->farg[6]); |
981 |
break; |
982 |
case ST_POLY: |
983 |
if (snew->nfargs < 9 || snew->nfargs % 3) |
984 |
goto badcount; |
985 |
finish_polygon(snew); |
986 |
break; |
987 |
case ST_SOURCE: |
988 |
if (snew->nfargs != 4) |
989 |
goto badcount; |
990 |
for (n = 3; n--; ) /* need to reverse "normal" */ |
991 |
snew->snrm[n] = -snew->farg[n]; |
992 |
if (normalize(snew->snrm) == 0) |
993 |
goto badnorm; |
994 |
snew->area = sin((PI/180./2.)*snew->farg[3]); |
995 |
snew->area *= PI*snew->area; |
996 |
break; |
997 |
} |
998 |
if ((snew->area <= FTINY) & (verbose >= 0)) { |
999 |
fprintf(stderr, "%s: warning - zero area for surface '%s'\n", |
1000 |
progname, oname); |
1001 |
free(snew); |
1002 |
return; |
1003 |
} |
1004 |
VSUM(curparams.nrm, curparams.nrm, snew->snrm, snew->area); |
1005 |
snew->next = curparams.slist; |
1006 |
curparams.slist = snew; |
1007 |
curparams.nsurfs++; |
1008 |
return; |
1009 |
badcount: |
1010 |
fprintf(stderr, "%s: bad argument count for surface element '%s'\n", |
1011 |
progname, oname); |
1012 |
exit(1); |
1013 |
badnorm: |
1014 |
fprintf(stderr, "%s: bad orientation for surface element '%s'\n", |
1015 |
progname, oname); |
1016 |
exit(1); |
1017 |
} |
1018 |
|
1019 |
/* Parse a receiver object (look for modifiers to add to rcontrib command) */ |
1020 |
static int |
1021 |
add_recv_object(FILE *fp) |
1022 |
{ |
1023 |
int st; |
1024 |
char thismod[128], otype[32], oname[128]; |
1025 |
int n; |
1026 |
|
1027 |
if (fscanf(fp, "%s %s %s", thismod, otype, oname) != 3) |
1028 |
return(0); /* must have hit EOF! */ |
1029 |
if (!strcmp(otype, "alias")) { |
1030 |
fscanf(fp, "%*s"); /* skip alias */ |
1031 |
return(0); |
1032 |
} |
1033 |
/* is it a new receiver? */ |
1034 |
if ((st = surf_type(otype)) != ST_NONE) { |
1035 |
if (curparams.slist != NULL && (st == ST_SOURCE) ^ |
1036 |
(curparams.slist->styp == ST_SOURCE)) { |
1037 |
fputs(progname, stderr); |
1038 |
fputs(": cannot mix source/non-source receivers!\n", stderr); |
1039 |
return(-1); |
1040 |
} |
1041 |
if (strcmp(thismod, curmod)) { |
1042 |
if (curmod[0]) { /* output last receiver? */ |
1043 |
finish_receiver(); |
1044 |
clear_params(&curparams, 1); |
1045 |
} |
1046 |
parse_params(&curparams, newparams); |
1047 |
newparams[0] = '\0'; |
1048 |
strcpy(curmod, thismod); |
1049 |
} |
1050 |
add_surface(st, oname, fp); /* read & store surface */ |
1051 |
return(1); |
1052 |
} |
1053 |
/* else skip arguments */ |
1054 |
if (!fscanf(fp, "%d", &n)) return(0); |
1055 |
while (n-- > 0) fscanf(fp, "%*s"); |
1056 |
if (!fscanf(fp, "%d", &n)) return(0); |
1057 |
while (n-- > 0) fscanf(fp, "%*d"); |
1058 |
if (!fscanf(fp, "%d", &n)) return(0); |
1059 |
while (n-- > 0) fscanf(fp, "%*f"); |
1060 |
return(0); |
1061 |
} |
1062 |
|
1063 |
/* Parse a sender object */ |
1064 |
static int |
1065 |
add_send_object(FILE *fp) |
1066 |
{ |
1067 |
int st; |
1068 |
char thismod[128], otype[32], oname[128]; |
1069 |
int n; |
1070 |
|
1071 |
if (fscanf(fp, "%s %s %s", thismod, otype, oname) != 3) |
1072 |
return(0); /* must have hit EOF! */ |
1073 |
if (!strcmp(otype, "alias")) { |
1074 |
fscanf(fp, "%*s"); /* skip alias */ |
1075 |
return(0); |
1076 |
} |
1077 |
/* is it a new surface? */ |
1078 |
if ((st = surf_type(otype)) != ST_NONE) { |
1079 |
if (st == ST_SOURCE) { |
1080 |
fputs(progname, stderr); |
1081 |
fputs(": cannot use source as a sender!\n", stderr); |
1082 |
return(-1); |
1083 |
} |
1084 |
if (strcmp(thismod, curmod)) { |
1085 |
if (curmod[0]) { |
1086 |
fputs(progname, stderr); |
1087 |
fputs(": warning - multiple modifiers in sender\n", |
1088 |
stderr); |
1089 |
} |
1090 |
strcpy(curmod, thismod); |
1091 |
} |
1092 |
parse_params(&curparams, newparams); |
1093 |
newparams[0] = '\0'; |
1094 |
add_surface(st, oname, fp); /* read & store surface */ |
1095 |
return(0); |
1096 |
} |
1097 |
/* else skip arguments */ |
1098 |
if (!fscanf(fp, "%d", &n)) return(0); |
1099 |
while (n-- > 0) fscanf(fp, "%*s"); |
1100 |
if (!fscanf(fp, "%d", &n)) return(0); |
1101 |
while (n-- > 0) fscanf(fp, "%*d"); |
1102 |
if (!fscanf(fp, "%d", &n)) return(0); |
1103 |
while (n-- > 0) fscanf(fp, "%*f"); |
1104 |
return(0); |
1105 |
} |
1106 |
|
1107 |
/* Load a Radiance scene using the given callback function for objects */ |
1108 |
static int |
1109 |
load_scene(const char *inspec, int (*ocb)(FILE *)) |
1110 |
{ |
1111 |
int rv = 0; |
1112 |
char inpbuf[1024]; |
1113 |
FILE *fp; |
1114 |
int c; |
1115 |
|
1116 |
if (*inspec == '!') |
1117 |
fp = popen(inspec+1, "r"); |
1118 |
else |
1119 |
fp = fopen(inspec, "r"); |
1120 |
if (fp == NULL) { |
1121 |
fprintf(stderr, "%s: cannot load '%s'\n", progname, inspec); |
1122 |
return(-1); |
1123 |
} |
1124 |
while ((c = getc(fp)) != EOF) { /* load receiver data */ |
1125 |
if (isspace(c)) /* skip leading white space */ |
1126 |
continue; |
1127 |
if (c == '!') { /* read from a new command */ |
1128 |
inpbuf[0] = c; |
1129 |
if (fgetline(inpbuf+1, sizeof(inpbuf)-1, fp) != NULL) { |
1130 |
if ((c = load_scene(inpbuf, ocb)) < 0) |
1131 |
return(c); |
1132 |
rv += c; |
1133 |
} |
1134 |
continue; |
1135 |
} |
1136 |
if (c == '#') { /* parameters/comment */ |
1137 |
if ((c = getc(fp)) == EOF || ungetc(c,fp) == EOF) |
1138 |
break; |
1139 |
if (!isspace(c) && fscanf(fp, "%s", inpbuf) == 1 && |
1140 |
!strcmp(inpbuf, PARAMSTART)) { |
1141 |
if (fgets(inpbuf, sizeof(inpbuf), fp) != NULL) |
1142 |
strcat(newparams, inpbuf); |
1143 |
continue; |
1144 |
} |
1145 |
while ((c = getc(fp)) != EOF && c != '\n') |
1146 |
; /* else skipping comment */ |
1147 |
continue; |
1148 |
} |
1149 |
ungetc(c, fp); /* else check object for receiver */ |
1150 |
c = (*ocb)(fp); |
1151 |
if (c < 0) |
1152 |
return(c); |
1153 |
rv += c; |
1154 |
} |
1155 |
/* close our input stream */ |
1156 |
c = (*inspec == '!') ? pclose(fp) : fclose(fp); |
1157 |
if (c != 0) { |
1158 |
fprintf(stderr, "%s: error loading '%s'\n", progname, inspec); |
1159 |
return(-1); |
1160 |
} |
1161 |
return(rv); |
1162 |
} |
1163 |
|
1164 |
/* Get command arguments and run program */ |
1165 |
int |
1166 |
main(int argc, char *argv[]) |
1167 |
{ |
1168 |
char fmtopt[6] = "-faa"; /* default output is ASCII */ |
1169 |
char *xrs=NULL, *yrs=NULL, *ldopt=NULL; |
1170 |
char *iropt = NULL; |
1171 |
char *sendfn; |
1172 |
char sampcntbuf[32], nsbinbuf[32]; |
1173 |
FILE *rcfp; |
1174 |
int nsbins; |
1175 |
int a, i; |
1176 |
/* screen rcontrib options */ |
1177 |
progname = argv[0]; |
1178 |
for (a = 1; a < argc-2; a++) { |
1179 |
int na; |
1180 |
/* check for argument expansion */ |
1181 |
while ((na = expandarg(&argc, &argv, a)) > 0) |
1182 |
; |
1183 |
if (na < 0) { |
1184 |
fprintf(stderr, "%s: cannot expand '%s'\n", |
1185 |
progname, argv[a]); |
1186 |
return(1); |
1187 |
} |
1188 |
if (argv[a][0] != '-' || !argv[a][1]) |
1189 |
break; |
1190 |
na = 1; |
1191 |
switch (argv[a][1]) { /* !! Keep consistent !! */ |
1192 |
case 'v': /* verbose mode */ |
1193 |
verbose = 1; |
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 'w': /* options without arguments */ |
1235 |
if (argv[a][2] != '+') verbose = -1; |
1236 |
case 'V': |
1237 |
case 'u': |
1238 |
case 'h': |
1239 |
case 'r': |
1240 |
break; |
1241 |
case 'n': /* options with 1 argument */ |
1242 |
case 's': |
1243 |
case 'o': |
1244 |
na = 2; |
1245 |
break; |
1246 |
case 'b': /* special case */ |
1247 |
if (argv[a][2] != 'v') goto userr; |
1248 |
break; |
1249 |
case 'l': /* special case */ |
1250 |
if (argv[a][2] == 'd') { |
1251 |
ldopt = argv[a]; |
1252 |
na = 0; |
1253 |
continue; |
1254 |
} |
1255 |
na = 2; |
1256 |
break; |
1257 |
case 'd': /* special case */ |
1258 |
if (argv[a][2] != 'v') na = 2; |
1259 |
break; |
1260 |
case 'a': /* special case */ |
1261 |
if (argv[a][2] == 'p') { |
1262 |
na = 2; /* photon map [+ bandwidth(s)] */ |
1263 |
if (a < argc-3 && atoi(argv[a+1]) > 0) |
1264 |
na += 1 + (a < argc-4 && atoi(argv[a+2]) > 0); |
1265 |
} else |
1266 |
na = (argv[a][2] == 'v') ? 4 : 2; |
1267 |
break; |
1268 |
case 'm': /* special case */ |
1269 |
if (!argv[a][2]) goto userr; |
1270 |
na = (argv[a][2] == 'e') | (argv[a][2] == 'a') ? 4 : 2; |
1271 |
break; |
1272 |
default: /* anything else is verbotten */ |
1273 |
goto userr; |
1274 |
} |
1275 |
if (na <= 0) continue; |
1276 |
CHECKARGC(na); /* pass on option */ |
1277 |
rcarg[nrcargs++] = argv[a]; |
1278 |
while (--na) /* + arguments if any */ |
1279 |
rcarg[nrcargs++] = argv[++a]; |
1280 |
} |
1281 |
if (a > argc-2) |
1282 |
goto userr; /* check at end of options */ |
1283 |
sendfn = argv[a++]; /* assign sender & receiver inputs */ |
1284 |
if (sendfn[0] == '-') { /* user wants pass-through mode? */ |
1285 |
if (sendfn[1]) goto userr; |
1286 |
sendfn = NULL; |
1287 |
if (iropt) { |
1288 |
CHECKARGC(1); |
1289 |
rcarg[nrcargs++] = iropt; |
1290 |
} |
1291 |
if (xrs) { |
1292 |
CHECKARGC(2); |
1293 |
rcarg[nrcargs++] = "-x"; |
1294 |
rcarg[nrcargs++] = xrs; |
1295 |
} |
1296 |
if (yrs) { |
1297 |
CHECKARGC(2); |
1298 |
rcarg[nrcargs++] = "-y"; |
1299 |
rcarg[nrcargs++] = yrs; |
1300 |
} |
1301 |
if (ldopt) { |
1302 |
CHECKARGC(1); |
1303 |
rcarg[nrcargs++] = ldopt; |
1304 |
} |
1305 |
if (sampcnt <= 0) sampcnt = 1; |
1306 |
} else { /* else in sampling mode */ |
1307 |
if (iropt) { |
1308 |
fputs(progname, stderr); |
1309 |
fputs(": -i, -I supported for pass-through only\n", stderr); |
1310 |
return(1); |
1311 |
} |
1312 |
#ifdef SMLFLT |
1313 |
fmtopt[2] = 'f'; |
1314 |
#else |
1315 |
fmtopt[2] = 'd'; |
1316 |
#endif |
1317 |
if (sampcnt <= 0) sampcnt = 10000; |
1318 |
} |
1319 |
sprintf(sampcntbuf, "%d", sampcnt); |
1320 |
CHECKARGC(3); /* add our format & sample count */ |
1321 |
rcarg[nrcargs++] = fmtopt; |
1322 |
rcarg[nrcargs++] = "-c"; |
1323 |
rcarg[nrcargs++] = sampcntbuf; |
1324 |
/* add receiver arguments to rcontrib */ |
1325 |
if (load_scene(argv[a], add_recv_object) < 0) |
1326 |
return(1); |
1327 |
finish_receiver(); |
1328 |
if (sendfn == NULL) { /* pass-through mode? */ |
1329 |
CHECKARGC(1); /* add octree */ |
1330 |
rcarg[nrcargs++] = oconv_command(argc-a, argv+a); |
1331 |
rcarg[nrcargs] = NULL; |
1332 |
return(my_exec(rcarg)); /* rcontrib does everything */ |
1333 |
} |
1334 |
clear_params(&curparams, 0); /* else load sender surface & params */ |
1335 |
curmod[0] = '\0'; |
1336 |
if (load_scene(sendfn, add_send_object) < 0) |
1337 |
return(1); |
1338 |
if ((nsbins = prepare_sampler()) <= 0) |
1339 |
return(1); |
1340 |
CHECKARGC(3); /* add row count and octree */ |
1341 |
rcarg[nrcargs++] = "-y"; |
1342 |
sprintf(nsbinbuf, "%d", nsbins); |
1343 |
rcarg[nrcargs++] = nsbinbuf; |
1344 |
rcarg[nrcargs++] = oconv_command(argc-a, argv+a); |
1345 |
rcarg[nrcargs] = NULL; |
1346 |
/* open pipe to rcontrib process */ |
1347 |
if ((rcfp = popen_arglist(rcarg, "w")) == NULL) |
1348 |
return(1); |
1349 |
SET_FILE_BINARY(rcfp); |
1350 |
#ifdef getc_unlocked |
1351 |
flockfile(rcfp); |
1352 |
#endif |
1353 |
if (verbose > 0) { |
1354 |
fprintf(stderr, "%s: sampling %d directions", progname, nsbins); |
1355 |
if (curparams.nsurfs > 1) |
1356 |
fprintf(stderr, " (%d elements)\n", curparams.nsurfs); |
1357 |
else |
1358 |
fputc('\n', stderr); |
1359 |
} |
1360 |
for (i = 0; i < nsbins; i++) /* send rcontrib ray samples */ |
1361 |
if (!(*curparams.sample_basis)(&curparams, i, rcfp)) |
1362 |
return(1); |
1363 |
return(pclose(rcfp) < 0); /* all finished! */ |
1364 |
userr: |
1365 |
if (a < argc-2) |
1366 |
fprintf(stderr, "%s: unsupported option '%s'", progname, argv[a]); |
1367 |
fprintf(stderr, "Usage: %s [-v][rcontrib options] sender.rad receiver.rad [-i system.oct] [system.rad ..]\n", |
1368 |
progname); |
1369 |
return(1); |
1370 |
} |