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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

# User Rev Content
1 greg 2.1 #ifndef lint
2 greg 2.24 static const char RCSid[] = "$Id: dctimestep.c,v 2.23 2012/11/02 00:26:55 greg Exp $";
3 greg 2.1 #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 greg 2.15 #include "paths.h"
14 greg 2.1 #include "color.h"
15     #include "resolu.h"
16     #include "bsdf.h"
17 greg 2.15 #include "bsdf_m.h"
18 greg 2.1
19     char *progname; /* global argv[0] */
20    
21 greg 2.2 /* Data types for file loading */
22 greg 2.1 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 greg 2.10 error(USER, "attempt to create empty matrix");
44 greg 2.1 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 greg 2.12 if (ncols <= 0)
114     error(USER, "Non-positive number of columns");
115 greg 2.1 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 greg 2.2
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 greg 2.1 if (fseek(fp, startpos, SEEK_SET) < 0) {
150     sprintf(errmsg,
151     "fseek() error on file '%s'",
152     fname);
153     error(SYSTEM, errmsg);
154     }
155 greg 2.2 nrows = guessrows; /* we're confident */
156 greg 2.1 }
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 greg 2.6 if (r >= cm->nrows) /* need more space? */
168 greg 2.1 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 greg 2.6 if ((nrows <= 0) & (r > 0) & !c) {
173 greg 2.1 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 greg 2.6 else if (nread && !(nread % cm->ncols))
201 greg 2.1 /* 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 greg 2.24 /* 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 greg 2.20 /* 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 greg 2.1 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 greg 2.15 /* Convert a BSDF to our matrix representation */
340 greg 2.1 static CMATRIX *
341 greg 2.15 cm_bsdf(const COLOR bsdfLamb, const COLOR specCol, const SDMat *bsdf)
342 greg 2.1 {
343 greg 2.16 CMATRIX *cm = cm_alloc(bsdf->nout, bsdf->ninc);
344 greg 2.3 int nbadohm = 0;
345     int nneg = 0;
346 greg 2.1 int r, c;
347 greg 2.22 /* loop over incident angles */
348 greg 2.16 for (c = 0; c < cm->ncols; c++) {
349 greg 2.17 const double dom = mBSDF_incohm(bsdf,c);
350     /* projected solid angle */
351 greg 2.16 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 greg 2.3 }
361 greg 2.16 copycolor(mp, specCol);
362     scalecolor(mp, f);
363     addcolor(mp, bsdfLamb);
364     scalecolor(mp, dom);
365 greg 2.3 }
366 greg 2.7 }
367 greg 2.15 if (nneg | nbadohm) {
368 greg 2.3 sprintf(errmsg,
369 greg 2.4 "BTDF has %d negatives and %d bad incoming solid angles",
370     nneg, nbadohm);
371 greg 2.3 error(WARNING, errmsg);
372     }
373 greg 2.1 return(cm);
374     }
375    
376 greg 2.22 /* 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 greg 2.15 /* Load and convert a matrix BSDF from the given XML file */
440     static CMATRIX *
441 greg 2.20 cm_loadBSDF(char *fname, COLOR cLamb)
442 greg 2.15 {
443 greg 2.21 CMATRIX *Tmat;
444     char *fpath;
445 greg 2.22 int recip;
446 greg 2.21 SDError ec;
447     SDData myBSDF;
448     SDSpectralDF *tdf;
449     COLOR bsdfLamb, specCol;
450 greg 2.15 /* 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 greg 2.16 SDclearBSDF(&myBSDF, fname); /* load XML and check type */
457 greg 2.15 ec = SDloadFile(&myBSDF, fpath);
458     if (ec)
459     error(USER, transSDError(ec));
460 greg 2.20 ccy2rgb(&myBSDF.tLamb.spec, myBSDF.tLamb.cieY/PI, bsdfLamb);
461 greg 2.23 recip = (myBSDF.tb == NULL);
462     tdf = recip ? myBSDF.tf : myBSDF.tb;
463 greg 2.21 if (tdf == NULL) { /* no non-Lambertian transmission? */
464 greg 2.20 if (cLamb != NULL)
465     copycolor(cLamb, bsdfLamb);
466     SDfreeBSDF(&myBSDF);
467     return(NULL);
468     }
469 greg 2.21 if (tdf->ncomp != 1 || tdf->comp[0].func != &SDhandleMtx) {
470 greg 2.15 sprintf(errmsg, "unsupported BSDF '%s'", fpath);
471     error(USER, errmsg);
472     }
473     /* convert BTDF to matrix */
474 greg 2.21 ccy2rgb(&tdf->comp[0].cspec[0], 1., specCol);
475 greg 2.22 Tmat = recip ? cm_bsdf_recip(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist)
476     : cm_bsdf(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist);
477 greg 2.20 if (cLamb != NULL) /* Lambertian is included */
478     setcolor(cLamb, .0, .0, .0);
479 greg 2.15 /* free BSDF and return */
480     SDfreeBSDF(&myBSDF);
481     return(Tmat);
482     }
483    
484 greg 2.24 /* Sum together a set of images and write result to fout */
485 greg 2.1 static int
486 greg 2.13 sum_images(const char *fspec, const CMATRIX *cv, FILE *fout)
487 greg 2.1 {
488     int myDT = DTfromHeader;
489 greg 2.24 COLOR *scanline = NULL;
490     CMATRIX *pmat = NULL;
491     int myXR=0, myYR=0;
492 greg 2.1 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 greg 2.14 /* check for zero */
503 greg 2.19 if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) &&
504     (myDT != DTfromHeader) | (i < cv->nrows-1))
505 greg 2.14 continue;
506 greg 2.1 /* 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 greg 2.2 /* finish header */
528 greg 2.13 fputformat(myDT==DTrgbe ? COLRFMT : CIEFMT, fout);
529     fputc('\n', fout);
530     fprtresolu(myXR, myYR, fout);
531     fflush(fout);
532 greg 2.1 } 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 greg 2.13 if (fwritescan((COLOR *)cm_lval(pmat, y, 0), myXR, fout) < 0)
557 greg 2.1 return(0);
558     cm_free(pmat); /* all done */
559 greg 2.13 return(fflush(fout) == 0);
560 greg 2.1 }
561    
562 greg 2.11 /* check to see if a string contains a %d or %o specification */
563     static int
564     hasNumberFormat(const char *s)
565 greg 2.1 {
566 greg 2.24 if (s == NULL)
567     return(0);
568    
569 greg 2.18 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 greg 2.1 }
586    
587     int
588     main(int argc, char *argv[])
589     {
590 greg 2.24 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 greg 2.1
597     progname = argv[0];
598 greg 2.24 /* 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 greg 2.1
615 greg 2.24 if (argc-a > 2) { /* VTDs expression */
616     CMATRIX *smtx, *Dmat, *Tmat, *imtx;
617 greg 2.20 COLOR tLamb;
618 greg 2.24 /* get sky vector/matrix */
619     smtx = cm_load(argv[a+3], 0, nsteps, DTascii);
620 greg 2.12 /* load BSDF */
621 greg 2.24 Tmat = cm_loadBSDF(argv[a+1], tLamb);
622 greg 2.5 /* load Daylight matrix */
623 greg 2.24 Dmat = cm_load(argv[a+2], Tmat==NULL ? 0 : Tmat->ncols,
624     smtx->nrows, DTfromHeader);
625 greg 2.1 /* multiply vector through */
626 greg 2.24 imtx = cm_multiply(Dmat, smtx);
627     cm_free(Dmat); cm_free(smtx);
628 greg 2.20 if (Tmat == NULL) { /* diffuse only */
629 greg 2.24 cmtx = cm_scale(imtx, tLamb);
630 greg 2.20 } else { /* else apply BTDF matrix */
631 greg 2.24 cmtx = cm_multiply(Tmat, imtx);
632 greg 2.20 cm_free(Tmat);
633     }
634 greg 2.24 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 greg 2.12 }
651 greg 2.24 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 greg 2.1 return(1);
689 greg 2.24 } else { /* generating vector/matrix */
690     CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader);
691     CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
692 greg 2.1 cm_free(Vmat);
693 greg 2.24 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 greg 2.1 }
721 greg 2.24 cm_free(cmtx);
722 greg 2.1 return(0);
723 greg 2.24 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 greg 2.1 }