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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

# User Rev Content
1 greg 2.1 #ifndef lint
2 greg 2.26 static const char RCSid[] = "$Id: dctimestep.c,v 2.25 2013/01/11 17:21:39 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 greg 2.25 FILE *fp = stdin;
111 greg 2.1 CMATRIX *cm;
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 greg 2.25 #ifdef getc_unlocked
122     flockfile(fp);
123     #endif
124 greg 2.1 if (dtype != DTascii)
125 greg 2.26 SET_FILE_BINARY(fp); /* doesn't really work */
126 greg 2.1 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 greg 2.2
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 greg 2.1 if (fseek(fp, startpos, SEEK_SET) < 0) {
153     sprintf(errmsg,
154     "fseek() error on file '%s'",
155     fname);
156     error(SYSTEM, errmsg);
157     }
158 greg 2.2 nrows = guessrows; /* we're confident */
159 greg 2.1 }
160     }
161     cm = cm_alloc(guessrows, ncols);
162     } else
163     cm = cm_alloc(nrows, ncols);
164 greg 2.25 if (cm == NULL) /* XXX never happens */
165 greg 2.1 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 greg 2.6 if (r >= cm->nrows) /* need more space? */
171 greg 2.1 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 greg 2.6 if ((nrows <= 0) & (r > 0) & !c) {
176 greg 2.1 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 greg 2.6 else if (nread && !(nread % cm->ncols))
204 greg 2.1 /* 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 greg 2.25 if (fgetc(fp) != EOF) {
240 greg 2.1 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 greg 2.25 #ifdef getc_unlocked
249     else
250     funlockfile(fp);
251     #endif
252 greg 2.1 return(cm);
253     EOFerror:
254 greg 2.25 sprintf(errmsg, "unexpected EOF reading %s", fname);
255 greg 2.1 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 greg 2.24 /* 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 greg 2.26 error(INTERNAL, "column requested outside matrix");
270 greg 2.24 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 greg 2.20 /* 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 greg 2.1 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 greg 2.15 /* Convert a BSDF to our matrix representation */
346 greg 2.1 static CMATRIX *
347 greg 2.15 cm_bsdf(const COLOR bsdfLamb, const COLOR specCol, const SDMat *bsdf)
348 greg 2.1 {
349 greg 2.16 CMATRIX *cm = cm_alloc(bsdf->nout, bsdf->ninc);
350 greg 2.3 int nbadohm = 0;
351     int nneg = 0;
352 greg 2.1 int r, c;
353 greg 2.22 /* loop over incident angles */
354 greg 2.16 for (c = 0; c < cm->ncols; c++) {
355 greg 2.17 const double dom = mBSDF_incohm(bsdf,c);
356     /* projected solid angle */
357 greg 2.16 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 greg 2.3 }
367 greg 2.16 copycolor(mp, specCol);
368     scalecolor(mp, f);
369     addcolor(mp, bsdfLamb);
370     scalecolor(mp, dom);
371 greg 2.3 }
372 greg 2.7 }
373 greg 2.15 if (nneg | nbadohm) {
374 greg 2.3 sprintf(errmsg,
375 greg 2.4 "BTDF has %d negatives and %d bad incoming solid angles",
376     nneg, nbadohm);
377 greg 2.3 error(WARNING, errmsg);
378     }
379 greg 2.1 return(cm);
380     }
381    
382 greg 2.22 /* 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 greg 2.15 /* Load and convert a matrix BSDF from the given XML file */
446     static CMATRIX *
447 greg 2.20 cm_loadBSDF(char *fname, COLOR cLamb)
448 greg 2.15 {
449 greg 2.21 CMATRIX *Tmat;
450     char *fpath;
451 greg 2.22 int recip;
452 greg 2.21 SDError ec;
453     SDData myBSDF;
454     SDSpectralDF *tdf;
455     COLOR bsdfLamb, specCol;
456 greg 2.15 /* 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 greg 2.16 SDclearBSDF(&myBSDF, fname); /* load XML and check type */
463 greg 2.15 ec = SDloadFile(&myBSDF, fpath);
464     if (ec)
465     error(USER, transSDError(ec));
466 greg 2.20 ccy2rgb(&myBSDF.tLamb.spec, myBSDF.tLamb.cieY/PI, bsdfLamb);
467 greg 2.23 recip = (myBSDF.tb == NULL);
468     tdf = recip ? myBSDF.tf : myBSDF.tb;
469 greg 2.21 if (tdf == NULL) { /* no non-Lambertian transmission? */
470 greg 2.20 if (cLamb != NULL)
471     copycolor(cLamb, bsdfLamb);
472     SDfreeBSDF(&myBSDF);
473     return(NULL);
474     }
475 greg 2.21 if (tdf->ncomp != 1 || tdf->comp[0].func != &SDhandleMtx) {
476 greg 2.15 sprintf(errmsg, "unsupported BSDF '%s'", fpath);
477     error(USER, errmsg);
478     }
479     /* convert BTDF to matrix */
480 greg 2.21 ccy2rgb(&tdf->comp[0].cspec[0], 1., specCol);
481 greg 2.22 Tmat = recip ? cm_bsdf_recip(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist)
482     : cm_bsdf(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist);
483 greg 2.20 if (cLamb != NULL) /* Lambertian is included */
484     setcolor(cLamb, .0, .0, .0);
485 greg 2.15 /* free BSDF and return */
486     SDfreeBSDF(&myBSDF);
487     return(Tmat);
488     }
489    
490 greg 2.24 /* Sum together a set of images and write result to fout */
491 greg 2.1 static int
492 greg 2.13 sum_images(const char *fspec, const CMATRIX *cv, FILE *fout)
493 greg 2.1 {
494     int myDT = DTfromHeader;
495 greg 2.24 COLOR *scanline = NULL;
496     CMATRIX *pmat = NULL;
497     int myXR=0, myYR=0;
498 greg 2.1 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 greg 2.14 /* check for zero */
509 greg 2.19 if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) &&
510     (myDT != DTfromHeader) | (i < cv->nrows-1))
511 greg 2.14 continue;
512 greg 2.1 /* 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 greg 2.2 /* finish header */
534 greg 2.13 fputformat(myDT==DTrgbe ? COLRFMT : CIEFMT, fout);
535     fputc('\n', fout);
536     fprtresolu(myXR, myYR, fout);
537     fflush(fout);
538 greg 2.1 } 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 greg 2.13 if (fwritescan((COLOR *)cm_lval(pmat, y, 0), myXR, fout) < 0)
563 greg 2.1 return(0);
564     cm_free(pmat); /* all done */
565 greg 2.13 return(fflush(fout) == 0);
566 greg 2.1 }
567    
568 greg 2.11 /* check to see if a string contains a %d or %o specification */
569     static int
570     hasNumberFormat(const char *s)
571 greg 2.1 {
572 greg 2.24 if (s == NULL)
573     return(0);
574    
575 greg 2.18 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 greg 2.1 }
592    
593     int
594     main(int argc, char *argv[])
595     {
596 greg 2.25 int skyfmt = DTascii;
597 greg 2.24 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 greg 2.1
604     progname = argv[0];
605 greg 2.24 /* get options */
606 greg 2.25 for (a = 1; a < argc && argv[a][0] == '-'; a++)
607     switch (argv[a][1]) {
608 greg 2.24 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 greg 2.25 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 greg 2.24 default:
632     goto userr;
633     }
634     if ((argc-a < 1) | (argc-a > 4))
635     goto userr;
636 greg 2.1
637 greg 2.24 if (argc-a > 2) { /* VTDs expression */
638     CMATRIX *smtx, *Dmat, *Tmat, *imtx;
639 greg 2.20 COLOR tLamb;
640 greg 2.24 /* get sky vector/matrix */
641 greg 2.25 smtx = cm_load(argv[a+3], 0, nsteps, skyfmt);
642 greg 2.12 /* load BSDF */
643 greg 2.24 Tmat = cm_loadBSDF(argv[a+1], tLamb);
644 greg 2.5 /* load Daylight matrix */
645 greg 2.24 Dmat = cm_load(argv[a+2], Tmat==NULL ? 0 : Tmat->ncols,
646     smtx->nrows, DTfromHeader);
647 greg 2.1 /* multiply vector through */
648 greg 2.24 imtx = cm_multiply(Dmat, smtx);
649     cm_free(Dmat); cm_free(smtx);
650 greg 2.20 if (Tmat == NULL) { /* diffuse only */
651 greg 2.24 cmtx = cm_scale(imtx, tLamb);
652 greg 2.20 } else { /* else apply BTDF matrix */
653 greg 2.24 cmtx = cm_multiply(Tmat, imtx);
654 greg 2.20 cm_free(Tmat);
655     }
656 greg 2.24 cm_free(imtx);
657     } else { /* sky vector/matrix only */
658 greg 2.25 cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt);
659 greg 2.24 }
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 greg 2.12 }
673 greg 2.24 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 greg 2.1 return(1);
711 greg 2.24 } else { /* generating vector/matrix */
712     CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader);
713     CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
714 greg 2.1 cm_free(Vmat);
715 greg 2.24 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 greg 2.1 }
743 greg 2.24 cm_free(cmtx);
744 greg 2.1 return(0);
745 greg 2.24 userr:
746 greg 2.25 fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-i{f|d}] DCspec [skyf]\n",
747 greg 2.24 progname);
748 greg 2.25 fprintf(stderr, " or: %s [-n nsteps][-o ospec][-i{f|d}] Vspec Tbsdf.xml Dmat.dat [skyf]\n",
749 greg 2.24 progname);
750     return(1);
751 greg 2.1 }