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root/radiance/ray/src/util/dctimestep.c
Revision: 2.26
Committed: Fri Jan 11 17:54:17 2013 UTC (9 years, 10 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.25: +3 -3 lines
Log Message:
Minor fix in unreachable error

File Contents

# Content
1 #ifndef lint
2 static const char RCSid[] = "$Id: dctimestep.c,v 2.25 2013/01/11 17:21:39 greg Exp $";
3 #endif
4 /*
5 * Compute time-step result using Daylight Coefficient method.
6 *
7 * G. Ward
8 */
9
10 #include <ctype.h>
11 #include "standard.h"
12 #include "platform.h"
13 #include "paths.h"
14 #include "color.h"
15 #include "resolu.h"
16 #include "bsdf.h"
17 #include "bsdf_m.h"
18
19 char *progname; /* global argv[0] */
20
21 /* Data types for file loading */
22 enum {DTfromHeader, DTascii, DTfloat, DTdouble, DTrgbe, DTxyze};
23
24 /* A color coefficient matrix -- vectors have ncols==1 */
25 typedef struct {
26 int nrows, ncols;
27 COLORV cmem[3]; /* extends struct */
28 } CMATRIX;
29
30 #define COLSPEC (sizeof(COLORV)==sizeof(float) ? "%f %f %f" : "%lf %lf %lf")
31
32 #define cm_lval(cm,r,c) ((cm)->cmem + 3*((r)*(cm)->ncols + (c)))
33
34 #define cv_lval(cm,i) ((cm)->cmem + 3*(i))
35
36 /* Allocate a color coefficient matrix */
37 static CMATRIX *
38 cm_alloc(int nrows, int ncols)
39 {
40 CMATRIX *cm;
41
42 if ((nrows <= 0) | (ncols <= 0))
43 error(USER, "attempt to create empty matrix");
44 cm = (CMATRIX *)malloc(sizeof(CMATRIX) +
45 3*sizeof(COLORV)*(nrows*ncols - 1));
46 if (cm == NULL)
47 error(SYSTEM, "out of memory in cm_alloc()");
48 cm->nrows = nrows;
49 cm->ncols = ncols;
50 return(cm);
51 }
52
53 #define cm_free(cm) free(cm)
54
55 /* Resize color coefficient matrix */
56 static CMATRIX *
57 cm_resize(CMATRIX *cm, int nrows)
58 {
59 if (nrows == cm->nrows)
60 return(cm);
61 if (nrows <= 0) {
62 cm_free(cm);
63 return(NULL);
64 }
65 cm = (CMATRIX *)realloc(cm, sizeof(CMATRIX) +
66 3*sizeof(COLORV)*(nrows*cm->ncols - 1));
67 if (cm == NULL)
68 error(SYSTEM, "out of memory in cm_resize()");
69 cm->nrows = nrows;
70 return(cm);
71 }
72
73 /* Load header to obtain data type */
74 static int
75 getDT(char *s, void *p)
76 {
77 char fmt[32];
78
79 if (formatval(fmt, s)) {
80 if (!strcmp(fmt, "ascii"))
81 *((int *)p) = DTascii;
82 else if (!strcmp(fmt, "float"))
83 *((int *)p) = DTfloat;
84 else if (!strcmp(fmt, "double"))
85 *((int *)p) = DTdouble;
86 else if (!strcmp(fmt, COLRFMT))
87 *((int *)p) = DTrgbe;
88 else if (!strcmp(fmt, CIEFMT))
89 *((int *)p) = DTxyze;
90 }
91 return(0);
92 }
93
94 static int
95 getDTfromHeader(FILE *fp)
96 {
97 int dt = DTfromHeader;
98
99 if (getheader(fp, getDT, &dt) < 0)
100 error(SYSTEM, "header read error");
101 if (dt == DTfromHeader)
102 error(USER, "missing data format in header");
103 return(dt);
104 }
105
106 /* Allocate and load a matrix from the given file (or stdin if NULL) */
107 static CMATRIX *
108 cm_load(const char *fname, int nrows, int ncols, int dtype)
109 {
110 FILE *fp = stdin;
111 CMATRIX *cm;
112
113 if (ncols <= 0)
114 error(USER, "Non-positive number of columns");
115 if (fname == NULL)
116 fname = "<stdin>";
117 else if ((fp = fopen(fname, "r")) == NULL) {
118 sprintf(errmsg, "cannot open file '%s'", fname);
119 error(SYSTEM, errmsg);
120 }
121 #ifdef getc_unlocked
122 flockfile(fp);
123 #endif
124 if (dtype != DTascii)
125 SET_FILE_BINARY(fp); /* doesn't really work */
126 if (dtype == DTfromHeader)
127 dtype = getDTfromHeader(fp);
128 switch (dtype) {
129 case DTascii:
130 case DTfloat:
131 case DTdouble:
132 break;
133 default:
134 error(USER, "unexpected data type in cm_load()");
135 }
136 if (nrows <= 0) { /* don't know length? */
137 int guessrows = 147; /* usually big enough */
138 if ((dtype != DTascii) & (fp != stdin)) {
139 long startpos = ftell(fp);
140 if (fseek(fp, 0L, SEEK_END) == 0) {
141 long endpos = ftell(fp);
142 long elemsiz = 3*(dtype==DTfloat ?
143 sizeof(float) : sizeof(double));
144
145 if ((endpos - startpos) % (ncols*elemsiz)) {
146 sprintf(errmsg,
147 "improper length for binary file '%s'",
148 fname);
149 error(USER, errmsg);
150 }
151 guessrows = (endpos - startpos)/(ncols*elemsiz);
152 if (fseek(fp, startpos, SEEK_SET) < 0) {
153 sprintf(errmsg,
154 "fseek() error on file '%s'",
155 fname);
156 error(SYSTEM, errmsg);
157 }
158 nrows = guessrows; /* we're confident */
159 }
160 }
161 cm = cm_alloc(guessrows, ncols);
162 } else
163 cm = cm_alloc(nrows, ncols);
164 if (cm == NULL) /* XXX never happens */
165 return(NULL);
166 if (dtype == DTascii) { /* read text file */
167 int maxrow = (nrows > 0 ? nrows : 32000);
168 int r, c;
169 for (r = 0; r < maxrow; r++) {
170 if (r >= cm->nrows) /* need more space? */
171 cm = cm_resize(cm, 2*cm->nrows);
172 for (c = 0; c < ncols; c++) {
173 COLORV *cv = cm_lval(cm,r,c);
174 if (fscanf(fp, COLSPEC, cv, cv+1, cv+2) != 3)
175 if ((nrows <= 0) & (r > 0) & !c) {
176 cm = cm_resize(cm, maxrow=r);
177 break;
178 } else
179 goto EOFerror;
180 }
181 }
182 while ((c = getc(fp)) != EOF)
183 if (!isspace(c)) {
184 sprintf(errmsg,
185 "unexpected data at end of ascii file %s",
186 fname);
187 error(WARNING, errmsg);
188 break;
189 }
190 } else { /* read binary file */
191 if (sizeof(COLORV) == (dtype==DTfloat ? sizeof(float) :
192 sizeof(double))) {
193 int nread = 0;
194 do { /* read all we can */
195 nread += fread(cm->cmem + 3*nread,
196 3*sizeof(COLORV),
197 cm->nrows*cm->ncols - nread,
198 fp);
199 if (nrows <= 0) { /* unknown length */
200 if (nread == cm->nrows*cm->ncols)
201 /* need more space? */
202 cm = cm_resize(cm, 2*cm->nrows);
203 else if (nread && !(nread % cm->ncols))
204 /* seem to be done */
205 cm = cm_resize(cm, nread/cm->ncols);
206 else /* ended mid-row */
207 goto EOFerror;
208 } else if (nread < cm->nrows*cm->ncols)
209 goto EOFerror;
210 } while (nread < cm->nrows*cm->ncols);
211
212 } else if (dtype == DTdouble) {
213 double dc[3]; /* load from double */
214 COLORV *cvp = cm->cmem;
215 int n = nrows*ncols;
216
217 if (n <= 0)
218 goto not_handled;
219 while (n--) {
220 if (fread(dc, sizeof(double), 3, fp) != 3)
221 goto EOFerror;
222 copycolor(cvp, dc);
223 cvp += 3;
224 }
225 } else /* dtype == DTfloat */ {
226 float fc[3]; /* load from float */
227 COLORV *cvp = cm->cmem;
228 int n = nrows*ncols;
229
230 if (n <= 0)
231 goto not_handled;
232 while (n--) {
233 if (fread(fc, sizeof(float), 3, fp) != 3)
234 goto EOFerror;
235 copycolor(cvp, fc);
236 cvp += 3;
237 }
238 }
239 if (fgetc(fp) != EOF) {
240 sprintf(errmsg,
241 "unexpected data at end of binary file %s",
242 fname);
243 error(WARNING, errmsg);
244 }
245 }
246 if (fp != stdin)
247 fclose(fp);
248 #ifdef getc_unlocked
249 else
250 funlockfile(fp);
251 #endif
252 return(cm);
253 EOFerror:
254 sprintf(errmsg, "unexpected EOF reading %s", fname);
255 error(USER, errmsg);
256 not_handled:
257 error(INTERNAL, "unhandled data size or length in cm_load()");
258 return(NULL); /* gratis return */
259 }
260
261 /* Extract a column vector from a matrix */
262 static CMATRIX *
263 cm_column(const CMATRIX *cm, int c)
264 {
265 CMATRIX *cvr;
266 int dr;
267
268 if ((c < 0) | (c >= cm->ncols))
269 error(INTERNAL, "column requested outside matrix");
270 cvr = cm_alloc(cm->nrows, 1);
271 if (cvr == NULL)
272 return(NULL);
273 for (dr = 0; dr < cm->nrows; dr++) {
274 const COLORV *sp = cm_lval(cm,dr,c);
275 COLORV *dp = cv_lval(cvr,dr);
276 dp[0] = sp[0];
277 dp[1] = sp[1];
278 dp[2] = sp[2];
279 }
280 return(cvr);
281 }
282
283 /* Scale a matrix by a single value */
284 static CMATRIX *
285 cm_scale(const CMATRIX *cm1, const COLOR sca)
286 {
287 CMATRIX *cmr;
288 int dr, dc;
289
290 cmr = cm_alloc(cm1->nrows, cm1->ncols);
291 if (cmr == NULL)
292 return(NULL);
293 for (dr = 0; dr < cmr->nrows; dr++)
294 for (dc = 0; dc < cmr->ncols; dc++) {
295 const COLORV *sp = cm_lval(cm1,dr,dc);
296 COLORV *dp = cm_lval(cmr,dr,dc);
297 dp[0] = sp[0] * sca[0];
298 dp[1] = sp[1] * sca[1];
299 dp[2] = sp[2] * sca[2];
300 }
301 return(cmr);
302 }
303
304 /* Multiply two matrices (or a matrix and a vector) and allocate the result */
305 static CMATRIX *
306 cm_multiply(const CMATRIX *cm1, const CMATRIX *cm2)
307 {
308 CMATRIX *cmr;
309 int dr, dc, i;
310
311 if ((cm1->ncols <= 0) | (cm1->ncols != cm2->nrows))
312 error(INTERNAL, "matrix dimension mismatch in cm_multiply()");
313 cmr = cm_alloc(cm1->nrows, cm2->ncols);
314 if (cmr == NULL)
315 return(NULL);
316 for (dr = 0; dr < cmr->nrows; dr++)
317 for (dc = 0; dc < cmr->ncols; dc++) {
318 COLORV *dp = cm_lval(cmr,dr,dc);
319 dp[0] = dp[1] = dp[2] = 0;
320 for (i = 0; i < cm1->ncols; i++) {
321 const COLORV *cp1 = cm_lval(cm1,dr,i);
322 const COLORV *cp2 = cm_lval(cm2,i,dc);
323 dp[0] += cp1[0] * cp2[0];
324 dp[1] += cp1[1] * cp2[1];
325 dp[2] += cp1[2] * cp2[2];
326 }
327 }
328 return(cmr);
329 }
330
331 /* print out matrix as ASCII text -- no header */
332 static void
333 cm_print(const CMATRIX *cm, FILE *fp)
334 {
335 int r, c;
336 const COLORV *mp = cm->cmem;
337
338 for (r = 0; r < cm->nrows; r++) {
339 for (c = 0; c < cm->ncols; c++, mp += 3)
340 fprintf(fp, "\t%.6e %.6e %.6e", mp[0], mp[1], mp[2]);
341 fputc('\n', fp);
342 }
343 }
344
345 /* Convert a BSDF to our matrix representation */
346 static CMATRIX *
347 cm_bsdf(const COLOR bsdfLamb, const COLOR specCol, const SDMat *bsdf)
348 {
349 CMATRIX *cm = cm_alloc(bsdf->nout, bsdf->ninc);
350 int nbadohm = 0;
351 int nneg = 0;
352 int r, c;
353 /* loop over incident angles */
354 for (c = 0; c < cm->ncols; c++) {
355 const double dom = mBSDF_incohm(bsdf,c);
356 /* projected solid angle */
357 nbadohm += (dom <= 0);
358
359 for (r = 0; r < cm->nrows; r++) {
360 float f = mBSDF_value(bsdf,c,r);
361 COLORV *mp = cm_lval(cm,r,c);
362 /* check BSDF value */
363 if ((f <= 0) | (dom <= 0)) {
364 nneg += (f < -FTINY);
365 f = .0f;
366 }
367 copycolor(mp, specCol);
368 scalecolor(mp, f);
369 addcolor(mp, bsdfLamb);
370 scalecolor(mp, dom);
371 }
372 }
373 if (nneg | nbadohm) {
374 sprintf(errmsg,
375 "BTDF has %d negatives and %d bad incoming solid angles",
376 nneg, nbadohm);
377 error(WARNING, errmsg);
378 }
379 return(cm);
380 }
381
382 /* Convert between input and output indices for reciprocity */
383 static int
384 recip_out_from_in(const SDMat *bsdf, int in_recip)
385 {
386 FVECT v;
387
388 if (!mBSDF_incvec(v, bsdf, in_recip+.5))
389 return(in_recip); /* XXX should be error! */
390 v[2] = -v[2];
391 return(mBSDF_outndx(bsdf, v));
392 }
393
394 /* Convert between output and input indices for reciprocity */
395 static int
396 recip_in_from_out(const SDMat *bsdf, int out_recip)
397 {
398 FVECT v;
399
400 if (!mBSDF_outvec(v, bsdf, out_recip+.5))
401 return(out_recip); /* XXX should be error! */
402 v[2] = -v[2];
403 return(mBSDF_incndx(bsdf, v));
404 }
405
406 /* Convert a BSDF to our matrix representation, applying reciprocity */
407 static CMATRIX *
408 cm_bsdf_recip(const COLOR bsdfLamb, const COLOR specCol, const SDMat *bsdf)
409 {
410 CMATRIX *cm = cm_alloc(bsdf->ninc, bsdf->nout);
411 int nbadohm = 0;
412 int nneg = 0;
413 int r, c;
414 /* loop over incident angles */
415 for (c = 0; c < cm->ncols; c++) {
416 const int ro = recip_out_from_in(bsdf,c);
417 const double dom = mBSDF_outohm(bsdf,ro);
418 /* projected solid angle */
419 nbadohm += (dom <= 0);
420
421 for (r = 0; r < cm->nrows; r++) {
422 const int ri = recip_in_from_out(bsdf,r);
423 float f = mBSDF_value(bsdf,ri,ro);
424 COLORV *mp = cm_lval(cm,r,c);
425 /* check BSDF value */
426 if ((f <= 0) | (dom <= 0)) {
427 nneg += (f < -FTINY);
428 f = .0f;
429 }
430 copycolor(mp, specCol);
431 scalecolor(mp, f);
432 addcolor(mp, bsdfLamb);
433 scalecolor(mp, dom);
434 }
435 }
436 if (nneg | nbadohm) {
437 sprintf(errmsg,
438 "BTDF has %d negatives and %d bad incoming solid angles",
439 nneg, nbadohm);
440 error(WARNING, errmsg);
441 }
442 return(cm);
443 }
444
445 /* Load and convert a matrix BSDF from the given XML file */
446 static CMATRIX *
447 cm_loadBSDF(char *fname, COLOR cLamb)
448 {
449 CMATRIX *Tmat;
450 char *fpath;
451 int recip;
452 SDError ec;
453 SDData myBSDF;
454 SDSpectralDF *tdf;
455 COLOR bsdfLamb, specCol;
456 /* find path to BSDF file */
457 fpath = getpath(fname, getrlibpath(), R_OK);
458 if (fpath == NULL) {
459 sprintf(errmsg, "cannot find BSDF file '%s'", fname);
460 error(USER, errmsg);
461 }
462 SDclearBSDF(&myBSDF, fname); /* load XML and check type */
463 ec = SDloadFile(&myBSDF, fpath);
464 if (ec)
465 error(USER, transSDError(ec));
466 ccy2rgb(&myBSDF.tLamb.spec, myBSDF.tLamb.cieY/PI, bsdfLamb);
467 recip = (myBSDF.tb == NULL);
468 tdf = recip ? myBSDF.tf : myBSDF.tb;
469 if (tdf == NULL) { /* no non-Lambertian transmission? */
470 if (cLamb != NULL)
471 copycolor(cLamb, bsdfLamb);
472 SDfreeBSDF(&myBSDF);
473 return(NULL);
474 }
475 if (tdf->ncomp != 1 || tdf->comp[0].func != &SDhandleMtx) {
476 sprintf(errmsg, "unsupported BSDF '%s'", fpath);
477 error(USER, errmsg);
478 }
479 /* convert BTDF to matrix */
480 ccy2rgb(&tdf->comp[0].cspec[0], 1., specCol);
481 Tmat = recip ? cm_bsdf_recip(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist)
482 : cm_bsdf(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist);
483 if (cLamb != NULL) /* Lambertian is included */
484 setcolor(cLamb, .0, .0, .0);
485 /* free BSDF and return */
486 SDfreeBSDF(&myBSDF);
487 return(Tmat);
488 }
489
490 /* Sum together a set of images and write result to fout */
491 static int
492 sum_images(const char *fspec, const CMATRIX *cv, FILE *fout)
493 {
494 int myDT = DTfromHeader;
495 COLOR *scanline = NULL;
496 CMATRIX *pmat = NULL;
497 int myXR=0, myYR=0;
498 int i, y;
499
500 if (cv->ncols != 1)
501 error(INTERNAL, "expected vector in sum_images()");
502 for (i = 0; i < cv->nrows; i++) {
503 const COLORV *scv = cv_lval(cv,i);
504 char fname[1024];
505 FILE *fp;
506 int dt, xr, yr;
507 COLORV *psp;
508 /* check for zero */
509 if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) &&
510 (myDT != DTfromHeader) | (i < cv->nrows-1))
511 continue;
512 /* open next picture */
513 sprintf(fname, fspec, i);
514 if ((fp = fopen(fname, "r")) == NULL) {
515 sprintf(errmsg, "cannot open picture '%s'", fname);
516 error(SYSTEM, errmsg);
517 }
518 SET_FILE_BINARY(fp);
519 dt = getDTfromHeader(fp);
520 if ((dt != DTrgbe) & (dt != DTxyze) ||
521 !fscnresolu(&xr, &yr, fp)) {
522 sprintf(errmsg, "file '%s' not a picture", fname);
523 error(USER, errmsg);
524 }
525 if (myDT == DTfromHeader) { /* on first one */
526 myDT = dt;
527 myXR = xr; myYR = yr;
528 scanline = (COLOR *)malloc(sizeof(COLOR)*myXR);
529 if (scanline == NULL)
530 error(SYSTEM, "out of memory in sum_images()");
531 pmat = cm_alloc(myYR, myXR);
532 memset(pmat->cmem, 0, sizeof(COLOR)*myXR*myYR);
533 /* finish header */
534 fputformat(myDT==DTrgbe ? COLRFMT : CIEFMT, fout);
535 fputc('\n', fout);
536 fprtresolu(myXR, myYR, fout);
537 fflush(fout);
538 } else if ((dt != myDT) | (xr != myXR) | (yr != myYR)) {
539 sprintf(errmsg, "picture '%s' format/size mismatch",
540 fname);
541 error(USER, errmsg);
542 }
543 psp = pmat->cmem;
544 for (y = 0; y < yr; y++) { /* read it in */
545 int x;
546 if (freadscan(scanline, xr, fp) < 0) {
547 sprintf(errmsg, "error reading picture '%s'",
548 fname);
549 error(SYSTEM, errmsg);
550 }
551 /* sum in scanline */
552 for (x = 0; x < xr; x++, psp += 3) {
553 multcolor(scanline[x], scv);
554 addcolor(psp, scanline[x]);
555 }
556 }
557 fclose(fp); /* done this picture */
558 }
559 free(scanline);
560 /* write scanlines */
561 for (y = 0; y < myYR; y++)
562 if (fwritescan((COLOR *)cm_lval(pmat, y, 0), myXR, fout) < 0)
563 return(0);
564 cm_free(pmat); /* all done */
565 return(fflush(fout) == 0);
566 }
567
568 /* check to see if a string contains a %d or %o specification */
569 static int
570 hasNumberFormat(const char *s)
571 {
572 if (s == NULL)
573 return(0);
574
575 while (*s) {
576 while (*s != '%')
577 if (!*s++)
578 return(0);
579 if (*++s == '%') { /* ignore "%%" */
580 ++s;
581 continue;
582 }
583 while (isdigit(*s)) /* field length */
584 ++s;
585 /* field we'll use? */
586 if ((*s == 'd') | (*s == 'i') | (*s == 'o') |
587 (*s == 'x') | (*s == 'X'))
588 return(1);
589 }
590 return(0); /* didn't find one */
591 }
592
593 int
594 main(int argc, char *argv[])
595 {
596 int skyfmt = DTascii;
597 int nsteps = 1;
598 char *ofspec = NULL;
599 FILE *ofp = stdout;
600 CMATRIX *cmtx; /* component vector/matrix result */
601 char fnbuf[256];
602 int a, i;
603
604 progname = argv[0];
605 /* get options */
606 for (a = 1; a < argc && argv[a][0] == '-'; a++)
607 switch (argv[a][1]) {
608 case 'n':
609 nsteps = atoi(argv[++a]);
610 if (nsteps <= 0)
611 goto userr;
612 break;
613 case 'o':
614 ofspec = argv[++a];
615 break;
616 case 'i':
617 switch (argv[a][2]) {
618 case 'f':
619 skyfmt = DTfloat;
620 break;
621 case 'd':
622 skyfmt = DTdouble;
623 break;
624 case 'a':
625 skyfmt = DTascii;
626 break;
627 default:
628 goto userr;
629 }
630 break;
631 default:
632 goto userr;
633 }
634 if ((argc-a < 1) | (argc-a > 4))
635 goto userr;
636
637 if (argc-a > 2) { /* VTDs expression */
638 CMATRIX *smtx, *Dmat, *Tmat, *imtx;
639 COLOR tLamb;
640 /* get sky vector/matrix */
641 smtx = cm_load(argv[a+3], 0, nsteps, skyfmt);
642 /* load BSDF */
643 Tmat = cm_loadBSDF(argv[a+1], tLamb);
644 /* load Daylight matrix */
645 Dmat = cm_load(argv[a+2], Tmat==NULL ? 0 : Tmat->ncols,
646 smtx->nrows, DTfromHeader);
647 /* multiply vector through */
648 imtx = cm_multiply(Dmat, smtx);
649 cm_free(Dmat); cm_free(smtx);
650 if (Tmat == NULL) { /* diffuse only */
651 cmtx = cm_scale(imtx, tLamb);
652 } else { /* else apply BTDF matrix */
653 cmtx = cm_multiply(Tmat, imtx);
654 cm_free(Tmat);
655 }
656 cm_free(imtx);
657 } else { /* sky vector/matrix only */
658 cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt);
659 }
660 /* prepare output stream */
661 if ((ofspec != NULL) & (nsteps == 1) && hasNumberFormat(ofspec)) {
662 sprintf(fnbuf, ofspec, 1);
663 ofspec = fnbuf;
664 }
665 if (ofspec != NULL && !hasNumberFormat(ofspec)) {
666 if ((ofp = fopen(ofspec, "w")) == NULL) {
667 fprintf(stderr, "%s: cannot open '%s' for output\n",
668 progname, ofspec);
669 return(1);
670 }
671 ofspec = NULL; /* only need to open once */
672 }
673 if (hasNumberFormat(argv[a])) { /* generating image(s) */
674 if (ofspec == NULL) {
675 SET_FILE_BINARY(ofp);
676 newheader("RADIANCE", ofp);
677 printargs(argc, argv, ofp);
678 fputnow(ofp);
679 }
680 if (nsteps > 1) /* multiple output frames? */
681 for (i = 0; i < nsteps; i++) {
682 CMATRIX *cvec = cm_column(cmtx, i);
683 if (ofspec != NULL) {
684 sprintf(fnbuf, ofspec, i+1);
685 if ((ofp = fopen(fnbuf, "wb")) == NULL) {
686 fprintf(stderr,
687 "%s: cannot open '%s' for output\n",
688 progname, fnbuf);
689 return(1);
690 }
691 newheader("RADIANCE", ofp);
692 printargs(argc, argv, ofp);
693 fputnow(ofp);
694 }
695 fprintf(ofp, "FRAME=%d\n", i+1);
696 if (!sum_images(argv[a], cvec, ofp))
697 return(1);
698 if (ofspec != NULL) {
699 if (fclose(ofp) == EOF) {
700 fprintf(stderr,
701 "%s: error writing to '%s'\n",
702 progname, fnbuf);
703 return(1);
704 }
705 ofp = stdout;
706 }
707 cm_free(cvec);
708 }
709 else if (!sum_images(argv[a], cmtx, ofp))
710 return(1);
711 } else { /* generating vector/matrix */
712 CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader);
713 CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
714 cm_free(Vmat);
715 if (ofspec != NULL) /* multiple vector files? */
716 for (i = 0; i < nsteps; i++) {
717 CMATRIX *rvec = cm_column(rmtx, i);
718 sprintf(fnbuf, ofspec, i+1);
719 if ((ofp = fopen(fnbuf, "w")) == NULL) {
720 fprintf(stderr,
721 "%s: cannot open '%s' for output\n",
722 progname, fnbuf);
723 return(1);
724 }
725 cm_print(rvec, ofp);
726 if (fclose(ofp) == EOF) {
727 fprintf(stderr,
728 "%s: error writing to '%s'\n",
729 progname, fnbuf);
730 return(1);
731 }
732 ofp = stdout;
733 cm_free(rvec);
734 }
735 else
736 cm_print(rmtx, ofp);
737 cm_free(rmtx);
738 }
739 if (fflush(ofp) == EOF) { /* final clean-up */
740 fprintf(stderr, "%s: write error on output\n", progname);
741 return(1);
742 }
743 cm_free(cmtx);
744 return(0);
745 userr:
746 fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-i{f|d}] DCspec [skyf]\n",
747 progname);
748 fprintf(stderr, " or: %s [-n nsteps][-o ospec][-i{f|d}] Vspec Tbsdf.xml Dmat.dat [skyf]\n",
749 progname);
750 return(1);
751 }