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root/radiance/ray/src/util/dctimestep.c
Revision: 2.24
Committed: Fri Jan 11 05:07:47 2013 UTC (9 years, 11 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.23: +153 -40 lines
Log Message:
Added -n and -o options to dctimestep

File Contents

# Content
1 #ifndef lint
2 static const char RCSid[] = "$Id: dctimestep.c,v 2.23 2012/11/02 00:26:55 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 CMATRIX *cm;
111 FILE *fp = stdin;
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 if (dtype != DTascii)
122 SET_FILE_BINARY(fp);
123 if (dtype == DTfromHeader)
124 dtype = getDTfromHeader(fp);
125 switch (dtype) {
126 case DTascii:
127 case DTfloat:
128 case DTdouble:
129 break;
130 default:
131 error(USER, "unexpected data type in cm_load()");
132 }
133 if (nrows <= 0) { /* don't know length? */
134 int guessrows = 147; /* usually big enough */
135 if ((dtype != DTascii) & (fp != stdin)) {
136 long startpos = ftell(fp);
137 if (fseek(fp, 0L, SEEK_END) == 0) {
138 long endpos = ftell(fp);
139 long elemsiz = 3*(dtype==DTfloat ?
140 sizeof(float) : sizeof(double));
141
142 if ((endpos - startpos) % (ncols*elemsiz)) {
143 sprintf(errmsg,
144 "improper length for binary file '%s'",
145 fname);
146 error(USER, errmsg);
147 }
148 guessrows = (endpos - startpos)/(ncols*elemsiz);
149 if (fseek(fp, startpos, SEEK_SET) < 0) {
150 sprintf(errmsg,
151 "fseek() error on file '%s'",
152 fname);
153 error(SYSTEM, errmsg);
154 }
155 nrows = guessrows; /* we're confident */
156 }
157 }
158 cm = cm_alloc(guessrows, ncols);
159 } else
160 cm = cm_alloc(nrows, ncols);
161 if (cm == NULL)
162 return(NULL);
163 if (dtype == DTascii) { /* read text file */
164 int maxrow = (nrows > 0 ? nrows : 32000);
165 int r, c;
166 for (r = 0; r < maxrow; r++) {
167 if (r >= cm->nrows) /* need more space? */
168 cm = cm_resize(cm, 2*cm->nrows);
169 for (c = 0; c < ncols; c++) {
170 COLORV *cv = cm_lval(cm,r,c);
171 if (fscanf(fp, COLSPEC, cv, cv+1, cv+2) != 3)
172 if ((nrows <= 0) & (r > 0) & !c) {
173 cm = cm_resize(cm, maxrow=r);
174 break;
175 } else
176 goto EOFerror;
177 }
178 }
179 while ((c = getc(fp)) != EOF)
180 if (!isspace(c)) {
181 sprintf(errmsg,
182 "unexpected data at end of ascii file %s",
183 fname);
184 error(WARNING, errmsg);
185 break;
186 }
187 } else { /* read binary file */
188 if (sizeof(COLORV) == (dtype==DTfloat ? sizeof(float) :
189 sizeof(double))) {
190 int nread = 0;
191 do { /* read all we can */
192 nread += fread(cm->cmem + 3*nread,
193 3*sizeof(COLORV),
194 cm->nrows*cm->ncols - nread,
195 fp);
196 if (nrows <= 0) { /* unknown length */
197 if (nread == cm->nrows*cm->ncols)
198 /* need more space? */
199 cm = cm_resize(cm, 2*cm->nrows);
200 else if (nread && !(nread % cm->ncols))
201 /* seem to be done */
202 cm = cm_resize(cm, nread/cm->ncols);
203 else /* ended mid-row */
204 goto EOFerror;
205 } else if (nread < cm->nrows*cm->ncols)
206 goto EOFerror;
207 } while (nread < cm->nrows*cm->ncols);
208
209 } else if (dtype == DTdouble) {
210 double dc[3]; /* load from double */
211 COLORV *cvp = cm->cmem;
212 int n = nrows*ncols;
213
214 if (n <= 0)
215 goto not_handled;
216 while (n--) {
217 if (fread(dc, sizeof(double), 3, fp) != 3)
218 goto EOFerror;
219 copycolor(cvp, dc);
220 cvp += 3;
221 }
222 } else /* dtype == DTfloat */ {
223 float fc[3]; /* load from float */
224 COLORV *cvp = cm->cmem;
225 int n = nrows*ncols;
226
227 if (n <= 0)
228 goto not_handled;
229 while (n--) {
230 if (fread(fc, sizeof(float), 3, fp) != 3)
231 goto EOFerror;
232 copycolor(cvp, fc);
233 cvp += 3;
234 }
235 }
236 if (getc(fp) != EOF) {
237 sprintf(errmsg,
238 "unexpected data at end of binary file %s",
239 fname);
240 error(WARNING, errmsg);
241 }
242 }
243 if (fp != stdin)
244 fclose(fp);
245 return(cm);
246 EOFerror:
247 sprintf(errmsg, "unexpected EOF reading %s",
248 fname);
249 error(USER, errmsg);
250 not_handled:
251 error(INTERNAL, "unhandled data size or length in cm_load()");
252 return(NULL); /* gratis return */
253 }
254
255 /* Extract a column vector from a matrix */
256 static CMATRIX *
257 cm_column(const CMATRIX *cm, int c)
258 {
259 CMATRIX *cvr;
260 int dr;
261
262 if ((c < 0) | (c >= cm->ncols))
263 return(NULL);
264 cvr = cm_alloc(cm->nrows, 1);
265 if (cvr == NULL)
266 return(NULL);
267 for (dr = 0; dr < cm->nrows; dr++) {
268 const COLORV *sp = cm_lval(cm,dr,c);
269 COLORV *dp = cv_lval(cvr,dr);
270 dp[0] = sp[0];
271 dp[1] = sp[1];
272 dp[2] = sp[2];
273 }
274 return(cvr);
275 }
276
277 /* Scale a matrix by a single value */
278 static CMATRIX *
279 cm_scale(const CMATRIX *cm1, const COLOR sca)
280 {
281 CMATRIX *cmr;
282 int dr, dc;
283
284 cmr = cm_alloc(cm1->nrows, cm1->ncols);
285 if (cmr == NULL)
286 return(NULL);
287 for (dr = 0; dr < cmr->nrows; dr++)
288 for (dc = 0; dc < cmr->ncols; dc++) {
289 const COLORV *sp = cm_lval(cm1,dr,dc);
290 COLORV *dp = cm_lval(cmr,dr,dc);
291 dp[0] = sp[0] * sca[0];
292 dp[1] = sp[1] * sca[1];
293 dp[2] = sp[2] * sca[2];
294 }
295 return(cmr);
296 }
297
298 /* Multiply two matrices (or a matrix and a vector) and allocate the result */
299 static CMATRIX *
300 cm_multiply(const CMATRIX *cm1, const CMATRIX *cm2)
301 {
302 CMATRIX *cmr;
303 int dr, dc, i;
304
305 if ((cm1->ncols <= 0) | (cm1->ncols != cm2->nrows))
306 error(INTERNAL, "matrix dimension mismatch in cm_multiply()");
307 cmr = cm_alloc(cm1->nrows, cm2->ncols);
308 if (cmr == NULL)
309 return(NULL);
310 for (dr = 0; dr < cmr->nrows; dr++)
311 for (dc = 0; dc < cmr->ncols; dc++) {
312 COLORV *dp = cm_lval(cmr,dr,dc);
313 dp[0] = dp[1] = dp[2] = 0;
314 for (i = 0; i < cm1->ncols; i++) {
315 const COLORV *cp1 = cm_lval(cm1,dr,i);
316 const COLORV *cp2 = cm_lval(cm2,i,dc);
317 dp[0] += cp1[0] * cp2[0];
318 dp[1] += cp1[1] * cp2[1];
319 dp[2] += cp1[2] * cp2[2];
320 }
321 }
322 return(cmr);
323 }
324
325 /* print out matrix as ASCII text -- no header */
326 static void
327 cm_print(const CMATRIX *cm, FILE *fp)
328 {
329 int r, c;
330 const COLORV *mp = cm->cmem;
331
332 for (r = 0; r < cm->nrows; r++) {
333 for (c = 0; c < cm->ncols; c++, mp += 3)
334 fprintf(fp, "\t%.6e %.6e %.6e", mp[0], mp[1], mp[2]);
335 fputc('\n', fp);
336 }
337 }
338
339 /* Convert a BSDF to our matrix representation */
340 static CMATRIX *
341 cm_bsdf(const COLOR bsdfLamb, const COLOR specCol, const SDMat *bsdf)
342 {
343 CMATRIX *cm = cm_alloc(bsdf->nout, bsdf->ninc);
344 int nbadohm = 0;
345 int nneg = 0;
346 int r, c;
347 /* loop over incident angles */
348 for (c = 0; c < cm->ncols; c++) {
349 const double dom = mBSDF_incohm(bsdf,c);
350 /* projected solid angle */
351 nbadohm += (dom <= 0);
352
353 for (r = 0; r < cm->nrows; r++) {
354 float f = mBSDF_value(bsdf,c,r);
355 COLORV *mp = cm_lval(cm,r,c);
356 /* check BSDF value */
357 if ((f <= 0) | (dom <= 0)) {
358 nneg += (f < -FTINY);
359 f = .0f;
360 }
361 copycolor(mp, specCol);
362 scalecolor(mp, f);
363 addcolor(mp, bsdfLamb);
364 scalecolor(mp, dom);
365 }
366 }
367 if (nneg | nbadohm) {
368 sprintf(errmsg,
369 "BTDF has %d negatives and %d bad incoming solid angles",
370 nneg, nbadohm);
371 error(WARNING, errmsg);
372 }
373 return(cm);
374 }
375
376 /* Convert between input and output indices for reciprocity */
377 static int
378 recip_out_from_in(const SDMat *bsdf, int in_recip)
379 {
380 FVECT v;
381
382 if (!mBSDF_incvec(v, bsdf, in_recip+.5))
383 return(in_recip); /* XXX should be error! */
384 v[2] = -v[2];
385 return(mBSDF_outndx(bsdf, v));
386 }
387
388 /* Convert between output and input indices for reciprocity */
389 static int
390 recip_in_from_out(const SDMat *bsdf, int out_recip)
391 {
392 FVECT v;
393
394 if (!mBSDF_outvec(v, bsdf, out_recip+.5))
395 return(out_recip); /* XXX should be error! */
396 v[2] = -v[2];
397 return(mBSDF_incndx(bsdf, v));
398 }
399
400 /* Convert a BSDF to our matrix representation, applying reciprocity */
401 static CMATRIX *
402 cm_bsdf_recip(const COLOR bsdfLamb, const COLOR specCol, const SDMat *bsdf)
403 {
404 CMATRIX *cm = cm_alloc(bsdf->ninc, bsdf->nout);
405 int nbadohm = 0;
406 int nneg = 0;
407 int r, c;
408 /* loop over incident angles */
409 for (c = 0; c < cm->ncols; c++) {
410 const int ro = recip_out_from_in(bsdf,c);
411 const double dom = mBSDF_outohm(bsdf,ro);
412 /* projected solid angle */
413 nbadohm += (dom <= 0);
414
415 for (r = 0; r < cm->nrows; r++) {
416 const int ri = recip_in_from_out(bsdf,r);
417 float f = mBSDF_value(bsdf,ri,ro);
418 COLORV *mp = cm_lval(cm,r,c);
419 /* check BSDF value */
420 if ((f <= 0) | (dom <= 0)) {
421 nneg += (f < -FTINY);
422 f = .0f;
423 }
424 copycolor(mp, specCol);
425 scalecolor(mp, f);
426 addcolor(mp, bsdfLamb);
427 scalecolor(mp, dom);
428 }
429 }
430 if (nneg | nbadohm) {
431 sprintf(errmsg,
432 "BTDF has %d negatives and %d bad incoming solid angles",
433 nneg, nbadohm);
434 error(WARNING, errmsg);
435 }
436 return(cm);
437 }
438
439 /* Load and convert a matrix BSDF from the given XML file */
440 static CMATRIX *
441 cm_loadBSDF(char *fname, COLOR cLamb)
442 {
443 CMATRIX *Tmat;
444 char *fpath;
445 int recip;
446 SDError ec;
447 SDData myBSDF;
448 SDSpectralDF *tdf;
449 COLOR bsdfLamb, specCol;
450 /* find path to BSDF file */
451 fpath = getpath(fname, getrlibpath(), R_OK);
452 if (fpath == NULL) {
453 sprintf(errmsg, "cannot find BSDF file '%s'", fname);
454 error(USER, errmsg);
455 }
456 SDclearBSDF(&myBSDF, fname); /* load XML and check type */
457 ec = SDloadFile(&myBSDF, fpath);
458 if (ec)
459 error(USER, transSDError(ec));
460 ccy2rgb(&myBSDF.tLamb.spec, myBSDF.tLamb.cieY/PI, bsdfLamb);
461 recip = (myBSDF.tb == NULL);
462 tdf = recip ? myBSDF.tf : myBSDF.tb;
463 if (tdf == NULL) { /* no non-Lambertian transmission? */
464 if (cLamb != NULL)
465 copycolor(cLamb, bsdfLamb);
466 SDfreeBSDF(&myBSDF);
467 return(NULL);
468 }
469 if (tdf->ncomp != 1 || tdf->comp[0].func != &SDhandleMtx) {
470 sprintf(errmsg, "unsupported BSDF '%s'", fpath);
471 error(USER, errmsg);
472 }
473 /* convert BTDF to matrix */
474 ccy2rgb(&tdf->comp[0].cspec[0], 1., specCol);
475 Tmat = recip ? cm_bsdf_recip(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist)
476 : cm_bsdf(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist);
477 if (cLamb != NULL) /* Lambertian is included */
478 setcolor(cLamb, .0, .0, .0);
479 /* free BSDF and return */
480 SDfreeBSDF(&myBSDF);
481 return(Tmat);
482 }
483
484 /* Sum together a set of images and write result to fout */
485 static int
486 sum_images(const char *fspec, const CMATRIX *cv, FILE *fout)
487 {
488 int myDT = DTfromHeader;
489 COLOR *scanline = NULL;
490 CMATRIX *pmat = NULL;
491 int myXR=0, myYR=0;
492 int i, y;
493
494 if (cv->ncols != 1)
495 error(INTERNAL, "expected vector in sum_images()");
496 for (i = 0; i < cv->nrows; i++) {
497 const COLORV *scv = cv_lval(cv,i);
498 char fname[1024];
499 FILE *fp;
500 int dt, xr, yr;
501 COLORV *psp;
502 /* check for zero */
503 if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) &&
504 (myDT != DTfromHeader) | (i < cv->nrows-1))
505 continue;
506 /* open next picture */
507 sprintf(fname, fspec, i);
508 if ((fp = fopen(fname, "r")) == NULL) {
509 sprintf(errmsg, "cannot open picture '%s'", fname);
510 error(SYSTEM, errmsg);
511 }
512 SET_FILE_BINARY(fp);
513 dt = getDTfromHeader(fp);
514 if ((dt != DTrgbe) & (dt != DTxyze) ||
515 !fscnresolu(&xr, &yr, fp)) {
516 sprintf(errmsg, "file '%s' not a picture", fname);
517 error(USER, errmsg);
518 }
519 if (myDT == DTfromHeader) { /* on first one */
520 myDT = dt;
521 myXR = xr; myYR = yr;
522 scanline = (COLOR *)malloc(sizeof(COLOR)*myXR);
523 if (scanline == NULL)
524 error(SYSTEM, "out of memory in sum_images()");
525 pmat = cm_alloc(myYR, myXR);
526 memset(pmat->cmem, 0, sizeof(COLOR)*myXR*myYR);
527 /* finish header */
528 fputformat(myDT==DTrgbe ? COLRFMT : CIEFMT, fout);
529 fputc('\n', fout);
530 fprtresolu(myXR, myYR, fout);
531 fflush(fout);
532 } else if ((dt != myDT) | (xr != myXR) | (yr != myYR)) {
533 sprintf(errmsg, "picture '%s' format/size mismatch",
534 fname);
535 error(USER, errmsg);
536 }
537 psp = pmat->cmem;
538 for (y = 0; y < yr; y++) { /* read it in */
539 int x;
540 if (freadscan(scanline, xr, fp) < 0) {
541 sprintf(errmsg, "error reading picture '%s'",
542 fname);
543 error(SYSTEM, errmsg);
544 }
545 /* sum in scanline */
546 for (x = 0; x < xr; x++, psp += 3) {
547 multcolor(scanline[x], scv);
548 addcolor(psp, scanline[x]);
549 }
550 }
551 fclose(fp); /* done this picture */
552 }
553 free(scanline);
554 /* write scanlines */
555 for (y = 0; y < myYR; y++)
556 if (fwritescan((COLOR *)cm_lval(pmat, y, 0), myXR, fout) < 0)
557 return(0);
558 cm_free(pmat); /* all done */
559 return(fflush(fout) == 0);
560 }
561
562 /* check to see if a string contains a %d or %o specification */
563 static int
564 hasNumberFormat(const char *s)
565 {
566 if (s == NULL)
567 return(0);
568
569 while (*s) {
570 while (*s != '%')
571 if (!*s++)
572 return(0);
573 if (*++s == '%') { /* ignore "%%" */
574 ++s;
575 continue;
576 }
577 while (isdigit(*s)) /* field length */
578 ++s;
579 /* field we'll use? */
580 if ((*s == 'd') | (*s == 'i') | (*s == 'o') |
581 (*s == 'x') | (*s == 'X'))
582 return(1);
583 }
584 return(0); /* didn't find one */
585 }
586
587 int
588 main(int argc, char *argv[])
589 {
590 int nsteps = 1;
591 char *ofspec = NULL;
592 FILE *ofp = stdout;
593 CMATRIX *cmtx; /* component vector/matrix result */
594 char fnbuf[256];
595 int a, i;
596
597 progname = argv[0];
598 /* get options */
599 for (a = 1; a < argc-1 && argv[a][0] == '-'; a++)
600 switch (argv[0][1]) {
601 case 'n':
602 nsteps = atoi(argv[++a]);
603 if (nsteps <= 0)
604 goto userr;
605 break;
606 case 'o':
607 ofspec = argv[++a];
608 break;
609 default:
610 goto userr;
611 }
612 if ((argc-a < 1) | (argc-a > 4))
613 goto userr;
614
615 if (argc-a > 2) { /* VTDs expression */
616 CMATRIX *smtx, *Dmat, *Tmat, *imtx;
617 COLOR tLamb;
618 /* get sky vector/matrix */
619 smtx = cm_load(argv[a+3], 0, nsteps, DTascii);
620 /* load BSDF */
621 Tmat = cm_loadBSDF(argv[a+1], tLamb);
622 /* load Daylight matrix */
623 Dmat = cm_load(argv[a+2], Tmat==NULL ? 0 : Tmat->ncols,
624 smtx->nrows, DTfromHeader);
625 /* multiply vector through */
626 imtx = cm_multiply(Dmat, smtx);
627 cm_free(Dmat); cm_free(smtx);
628 if (Tmat == NULL) { /* diffuse only */
629 cmtx = cm_scale(imtx, tLamb);
630 } else { /* else apply BTDF matrix */
631 cmtx = cm_multiply(Tmat, imtx);
632 cm_free(Tmat);
633 }
634 cm_free(imtx);
635 } else { /* sky vector/matrix only */
636 cmtx = cm_load(argv[a+1], 0, nsteps, DTascii);
637 }
638 /* prepare output stream */
639 if ((ofspec != NULL) & (nsteps == 1) && hasNumberFormat(ofspec)) {
640 sprintf(fnbuf, ofspec, 1);
641 ofspec = fnbuf;
642 }
643 if (ofspec != NULL && !hasNumberFormat(ofspec)) {
644 if ((ofp = fopen(ofspec, "w")) == NULL) {
645 fprintf(stderr, "%s: cannot open '%s' for output\n",
646 progname, ofspec);
647 return(1);
648 }
649 ofspec = NULL; /* only need to open once */
650 }
651 if (hasNumberFormat(argv[a])) { /* generating image(s) */
652 if (ofspec == NULL) {
653 SET_FILE_BINARY(ofp);
654 newheader("RADIANCE", ofp);
655 printargs(argc, argv, ofp);
656 fputnow(ofp);
657 }
658 if (nsteps > 1) /* multiple output frames? */
659 for (i = 0; i < nsteps; i++) {
660 CMATRIX *cvec = cm_column(cmtx, i);
661 if (ofspec != NULL) {
662 sprintf(fnbuf, ofspec, i+1);
663 if ((ofp = fopen(fnbuf, "wb")) == NULL) {
664 fprintf(stderr,
665 "%s: cannot open '%s' for output\n",
666 progname, fnbuf);
667 return(1);
668 }
669 newheader("RADIANCE", ofp);
670 printargs(argc, argv, ofp);
671 fputnow(ofp);
672 }
673 fprintf(ofp, "FRAME=%d\n", i+1);
674 if (!sum_images(argv[a], cvec, ofp))
675 return(1);
676 if (ofspec != NULL) {
677 if (fclose(ofp) == EOF) {
678 fprintf(stderr,
679 "%s: error writing to '%s'\n",
680 progname, fnbuf);
681 return(1);
682 }
683 ofp = stdout;
684 }
685 cm_free(cvec);
686 }
687 else if (!sum_images(argv[a], cmtx, ofp))
688 return(1);
689 } else { /* generating vector/matrix */
690 CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader);
691 CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
692 cm_free(Vmat);
693 if (ofspec != NULL) /* multiple vector files? */
694 for (i = 0; i < nsteps; i++) {
695 CMATRIX *rvec = cm_column(rmtx, i);
696 sprintf(fnbuf, ofspec, i+1);
697 if ((ofp = fopen(fnbuf, "w")) == NULL) {
698 fprintf(stderr,
699 "%s: cannot open '%s' for output\n",
700 progname, fnbuf);
701 return(1);
702 }
703 cm_print(rvec, ofp);
704 if (fclose(ofp) == EOF) {
705 fprintf(stderr,
706 "%s: error writing to '%s'\n",
707 progname, fnbuf);
708 return(1);
709 }
710 ofp = stdout;
711 cm_free(rvec);
712 }
713 else
714 cm_print(rmtx, ofp);
715 cm_free(rmtx);
716 }
717 if (fflush(ofp) == EOF) { /* final clean-up */
718 fprintf(stderr, "%s: write error on output\n", progname);
719 return(1);
720 }
721 cm_free(cmtx);
722 return(0);
723 userr:
724 fprintf(stderr, "Usage: %s [-n nsteps][-o ospec] DCspec [skyf]\n",
725 progname);
726 fprintf(stderr, " or: %s [-n nsteps][-o ospec] Vspec Tbsdf.xml Dmat.dat [skyf]\n",
727 progname);
728 return(1);
729 }