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root/radiance/ray/src/util/dctimestep.c
Revision: 2.27
Committed: Sat Jan 19 22:30:55 2013 UTC (9 years, 10 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.26: +26 -1 lines
Log Message:
Improved efficiency of large matrix multiplications containing zero vectors

File Contents

# User Rev Content
1 greg 2.1 #ifndef lint
2 greg 2.27 static const char RCSid[] = "$Id: dctimestep.c,v 2.26 2013/01/11 17:54:17 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 greg 2.27 char *rowcheck=NULL, *colcheck=NULL;
309 greg 2.1 CMATRIX *cmr;
310     int dr, dc, i;
311    
312     if ((cm1->ncols <= 0) | (cm1->ncols != cm2->nrows))
313     error(INTERNAL, "matrix dimension mismatch in cm_multiply()");
314     cmr = cm_alloc(cm1->nrows, cm2->ncols);
315     if (cmr == NULL)
316     return(NULL);
317 greg 2.27 /* optimization: check for zero rows & cols */
318     if (((cm1->nrows > 5) | (cm2->ncols > 5)) & (cm1->ncols > 5)) {
319     static const COLOR czero;
320     rowcheck = (char *)calloc(cmr->nrows, 1);
321     for (dr = cm1->nrows*(rowcheck != NULL); dr--; )
322     for (dc = cm1->ncols; dc--; )
323     if (memcmp(cm_lval(cm1,dr,dc), czero, sizeof(COLOR))) {
324     rowcheck[dr] = 1;
325     break;
326     }
327     colcheck = (char *)calloc(cmr->ncols, 1);
328     for (dc = cm2->ncols*(colcheck != NULL); dc--; )
329     for (dr = cm2->nrows; dr--; )
330     if (memcmp(cm_lval(cm2,dr,dc), czero, sizeof(COLOR))) {
331     colcheck[dc] = 1;
332     break;
333     }
334     }
335 greg 2.1 for (dr = 0; dr < cmr->nrows; dr++)
336     for (dc = 0; dc < cmr->ncols; dc++) {
337     COLORV *dp = cm_lval(cmr,dr,dc);
338     dp[0] = dp[1] = dp[2] = 0;
339 greg 2.27 if (rowcheck != NULL && !rowcheck[dr])
340     continue;
341     if (colcheck != NULL && !colcheck[dc])
342     continue;
343 greg 2.1 for (i = 0; i < cm1->ncols; i++) {
344     const COLORV *cp1 = cm_lval(cm1,dr,i);
345     const COLORV *cp2 = cm_lval(cm2,i,dc);
346     dp[0] += cp1[0] * cp2[0];
347     dp[1] += cp1[1] * cp2[1];
348     dp[2] += cp1[2] * cp2[2];
349     }
350     }
351 greg 2.27 if (rowcheck != NULL) free(rowcheck);
352     if (colcheck != NULL) free(colcheck);
353 greg 2.1 return(cmr);
354     }
355    
356     /* print out matrix as ASCII text -- no header */
357     static void
358     cm_print(const CMATRIX *cm, FILE *fp)
359     {
360     int r, c;
361     const COLORV *mp = cm->cmem;
362    
363     for (r = 0; r < cm->nrows; r++) {
364     for (c = 0; c < cm->ncols; c++, mp += 3)
365     fprintf(fp, "\t%.6e %.6e %.6e", mp[0], mp[1], mp[2]);
366     fputc('\n', fp);
367     }
368     }
369    
370 greg 2.15 /* Convert a BSDF to our matrix representation */
371 greg 2.1 static CMATRIX *
372 greg 2.15 cm_bsdf(const COLOR bsdfLamb, const COLOR specCol, const SDMat *bsdf)
373 greg 2.1 {
374 greg 2.16 CMATRIX *cm = cm_alloc(bsdf->nout, bsdf->ninc);
375 greg 2.3 int nbadohm = 0;
376     int nneg = 0;
377 greg 2.1 int r, c;
378 greg 2.22 /* loop over incident angles */
379 greg 2.16 for (c = 0; c < cm->ncols; c++) {
380 greg 2.17 const double dom = mBSDF_incohm(bsdf,c);
381     /* projected solid angle */
382 greg 2.16 nbadohm += (dom <= 0);
383    
384     for (r = 0; r < cm->nrows; r++) {
385     float f = mBSDF_value(bsdf,c,r);
386     COLORV *mp = cm_lval(cm,r,c);
387     /* check BSDF value */
388     if ((f <= 0) | (dom <= 0)) {
389     nneg += (f < -FTINY);
390     f = .0f;
391 greg 2.3 }
392 greg 2.16 copycolor(mp, specCol);
393     scalecolor(mp, f);
394     addcolor(mp, bsdfLamb);
395     scalecolor(mp, dom);
396 greg 2.3 }
397 greg 2.7 }
398 greg 2.15 if (nneg | nbadohm) {
399 greg 2.3 sprintf(errmsg,
400 greg 2.4 "BTDF has %d negatives and %d bad incoming solid angles",
401     nneg, nbadohm);
402 greg 2.3 error(WARNING, errmsg);
403     }
404 greg 2.1 return(cm);
405     }
406    
407 greg 2.22 /* Convert between input and output indices for reciprocity */
408     static int
409     recip_out_from_in(const SDMat *bsdf, int in_recip)
410     {
411     FVECT v;
412    
413     if (!mBSDF_incvec(v, bsdf, in_recip+.5))
414     return(in_recip); /* XXX should be error! */
415     v[2] = -v[2];
416     return(mBSDF_outndx(bsdf, v));
417     }
418    
419     /* Convert between output and input indices for reciprocity */
420     static int
421     recip_in_from_out(const SDMat *bsdf, int out_recip)
422     {
423     FVECT v;
424    
425     if (!mBSDF_outvec(v, bsdf, out_recip+.5))
426     return(out_recip); /* XXX should be error! */
427     v[2] = -v[2];
428     return(mBSDF_incndx(bsdf, v));
429     }
430    
431     /* Convert a BSDF to our matrix representation, applying reciprocity */
432     static CMATRIX *
433     cm_bsdf_recip(const COLOR bsdfLamb, const COLOR specCol, const SDMat *bsdf)
434     {
435     CMATRIX *cm = cm_alloc(bsdf->ninc, bsdf->nout);
436     int nbadohm = 0;
437     int nneg = 0;
438     int r, c;
439     /* loop over incident angles */
440     for (c = 0; c < cm->ncols; c++) {
441     const int ro = recip_out_from_in(bsdf,c);
442     const double dom = mBSDF_outohm(bsdf,ro);
443     /* projected solid angle */
444     nbadohm += (dom <= 0);
445    
446     for (r = 0; r < cm->nrows; r++) {
447     const int ri = recip_in_from_out(bsdf,r);
448     float f = mBSDF_value(bsdf,ri,ro);
449     COLORV *mp = cm_lval(cm,r,c);
450     /* check BSDF value */
451     if ((f <= 0) | (dom <= 0)) {
452     nneg += (f < -FTINY);
453     f = .0f;
454     }
455     copycolor(mp, specCol);
456     scalecolor(mp, f);
457     addcolor(mp, bsdfLamb);
458     scalecolor(mp, dom);
459     }
460     }
461     if (nneg | nbadohm) {
462     sprintf(errmsg,
463     "BTDF has %d negatives and %d bad incoming solid angles",
464     nneg, nbadohm);
465     error(WARNING, errmsg);
466     }
467     return(cm);
468     }
469    
470 greg 2.15 /* Load and convert a matrix BSDF from the given XML file */
471     static CMATRIX *
472 greg 2.20 cm_loadBSDF(char *fname, COLOR cLamb)
473 greg 2.15 {
474 greg 2.21 CMATRIX *Tmat;
475     char *fpath;
476 greg 2.22 int recip;
477 greg 2.21 SDError ec;
478     SDData myBSDF;
479     SDSpectralDF *tdf;
480     COLOR bsdfLamb, specCol;
481 greg 2.15 /* find path to BSDF file */
482     fpath = getpath(fname, getrlibpath(), R_OK);
483     if (fpath == NULL) {
484     sprintf(errmsg, "cannot find BSDF file '%s'", fname);
485     error(USER, errmsg);
486     }
487 greg 2.16 SDclearBSDF(&myBSDF, fname); /* load XML and check type */
488 greg 2.15 ec = SDloadFile(&myBSDF, fpath);
489     if (ec)
490     error(USER, transSDError(ec));
491 greg 2.20 ccy2rgb(&myBSDF.tLamb.spec, myBSDF.tLamb.cieY/PI, bsdfLamb);
492 greg 2.23 recip = (myBSDF.tb == NULL);
493     tdf = recip ? myBSDF.tf : myBSDF.tb;
494 greg 2.21 if (tdf == NULL) { /* no non-Lambertian transmission? */
495 greg 2.20 if (cLamb != NULL)
496     copycolor(cLamb, bsdfLamb);
497     SDfreeBSDF(&myBSDF);
498     return(NULL);
499     }
500 greg 2.21 if (tdf->ncomp != 1 || tdf->comp[0].func != &SDhandleMtx) {
501 greg 2.15 sprintf(errmsg, "unsupported BSDF '%s'", fpath);
502     error(USER, errmsg);
503     }
504     /* convert BTDF to matrix */
505 greg 2.21 ccy2rgb(&tdf->comp[0].cspec[0], 1., specCol);
506 greg 2.22 Tmat = recip ? cm_bsdf_recip(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist)
507     : cm_bsdf(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist);
508 greg 2.20 if (cLamb != NULL) /* Lambertian is included */
509     setcolor(cLamb, .0, .0, .0);
510 greg 2.15 /* free BSDF and return */
511     SDfreeBSDF(&myBSDF);
512     return(Tmat);
513     }
514    
515 greg 2.24 /* Sum together a set of images and write result to fout */
516 greg 2.1 static int
517 greg 2.13 sum_images(const char *fspec, const CMATRIX *cv, FILE *fout)
518 greg 2.1 {
519     int myDT = DTfromHeader;
520 greg 2.24 COLOR *scanline = NULL;
521     CMATRIX *pmat = NULL;
522     int myXR=0, myYR=0;
523 greg 2.1 int i, y;
524    
525     if (cv->ncols != 1)
526     error(INTERNAL, "expected vector in sum_images()");
527     for (i = 0; i < cv->nrows; i++) {
528     const COLORV *scv = cv_lval(cv,i);
529     char fname[1024];
530     FILE *fp;
531     int dt, xr, yr;
532     COLORV *psp;
533 greg 2.14 /* check for zero */
534 greg 2.19 if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) &&
535     (myDT != DTfromHeader) | (i < cv->nrows-1))
536 greg 2.14 continue;
537 greg 2.1 /* open next picture */
538     sprintf(fname, fspec, i);
539     if ((fp = fopen(fname, "r")) == NULL) {
540     sprintf(errmsg, "cannot open picture '%s'", fname);
541     error(SYSTEM, errmsg);
542     }
543     SET_FILE_BINARY(fp);
544     dt = getDTfromHeader(fp);
545     if ((dt != DTrgbe) & (dt != DTxyze) ||
546     !fscnresolu(&xr, &yr, fp)) {
547     sprintf(errmsg, "file '%s' not a picture", fname);
548     error(USER, errmsg);
549     }
550     if (myDT == DTfromHeader) { /* on first one */
551     myDT = dt;
552     myXR = xr; myYR = yr;
553     scanline = (COLOR *)malloc(sizeof(COLOR)*myXR);
554     if (scanline == NULL)
555     error(SYSTEM, "out of memory in sum_images()");
556     pmat = cm_alloc(myYR, myXR);
557     memset(pmat->cmem, 0, sizeof(COLOR)*myXR*myYR);
558 greg 2.2 /* finish header */
559 greg 2.13 fputformat(myDT==DTrgbe ? COLRFMT : CIEFMT, fout);
560     fputc('\n', fout);
561     fprtresolu(myXR, myYR, fout);
562     fflush(fout);
563 greg 2.1 } else if ((dt != myDT) | (xr != myXR) | (yr != myYR)) {
564     sprintf(errmsg, "picture '%s' format/size mismatch",
565     fname);
566     error(USER, errmsg);
567     }
568     psp = pmat->cmem;
569     for (y = 0; y < yr; y++) { /* read it in */
570     int x;
571     if (freadscan(scanline, xr, fp) < 0) {
572     sprintf(errmsg, "error reading picture '%s'",
573     fname);
574     error(SYSTEM, errmsg);
575     }
576     /* sum in scanline */
577     for (x = 0; x < xr; x++, psp += 3) {
578     multcolor(scanline[x], scv);
579     addcolor(psp, scanline[x]);
580     }
581     }
582     fclose(fp); /* done this picture */
583     }
584     free(scanline);
585     /* write scanlines */
586     for (y = 0; y < myYR; y++)
587 greg 2.13 if (fwritescan((COLOR *)cm_lval(pmat, y, 0), myXR, fout) < 0)
588 greg 2.1 return(0);
589     cm_free(pmat); /* all done */
590 greg 2.13 return(fflush(fout) == 0);
591 greg 2.1 }
592    
593 greg 2.11 /* check to see if a string contains a %d or %o specification */
594     static int
595     hasNumberFormat(const char *s)
596 greg 2.1 {
597 greg 2.24 if (s == NULL)
598     return(0);
599    
600 greg 2.18 while (*s) {
601     while (*s != '%')
602     if (!*s++)
603     return(0);
604     if (*++s == '%') { /* ignore "%%" */
605     ++s;
606     continue;
607     }
608     while (isdigit(*s)) /* field length */
609     ++s;
610     /* field we'll use? */
611     if ((*s == 'd') | (*s == 'i') | (*s == 'o') |
612     (*s == 'x') | (*s == 'X'))
613     return(1);
614     }
615     return(0); /* didn't find one */
616 greg 2.1 }
617    
618     int
619     main(int argc, char *argv[])
620     {
621 greg 2.25 int skyfmt = DTascii;
622 greg 2.24 int nsteps = 1;
623     char *ofspec = NULL;
624     FILE *ofp = stdout;
625     CMATRIX *cmtx; /* component vector/matrix result */
626     char fnbuf[256];
627     int a, i;
628 greg 2.1
629     progname = argv[0];
630 greg 2.24 /* get options */
631 greg 2.25 for (a = 1; a < argc && argv[a][0] == '-'; a++)
632     switch (argv[a][1]) {
633 greg 2.24 case 'n':
634     nsteps = atoi(argv[++a]);
635     if (nsteps <= 0)
636     goto userr;
637     break;
638     case 'o':
639     ofspec = argv[++a];
640     break;
641 greg 2.25 case 'i':
642     switch (argv[a][2]) {
643     case 'f':
644     skyfmt = DTfloat;
645     break;
646     case 'd':
647     skyfmt = DTdouble;
648     break;
649     case 'a':
650     skyfmt = DTascii;
651     break;
652     default:
653     goto userr;
654     }
655     break;
656 greg 2.24 default:
657     goto userr;
658     }
659     if ((argc-a < 1) | (argc-a > 4))
660     goto userr;
661 greg 2.1
662 greg 2.24 if (argc-a > 2) { /* VTDs expression */
663     CMATRIX *smtx, *Dmat, *Tmat, *imtx;
664 greg 2.20 COLOR tLamb;
665 greg 2.24 /* get sky vector/matrix */
666 greg 2.25 smtx = cm_load(argv[a+3], 0, nsteps, skyfmt);
667 greg 2.12 /* load BSDF */
668 greg 2.24 Tmat = cm_loadBSDF(argv[a+1], tLamb);
669 greg 2.5 /* load Daylight matrix */
670 greg 2.24 Dmat = cm_load(argv[a+2], Tmat==NULL ? 0 : Tmat->ncols,
671     smtx->nrows, DTfromHeader);
672 greg 2.1 /* multiply vector through */
673 greg 2.24 imtx = cm_multiply(Dmat, smtx);
674     cm_free(Dmat); cm_free(smtx);
675 greg 2.20 if (Tmat == NULL) { /* diffuse only */
676 greg 2.24 cmtx = cm_scale(imtx, tLamb);
677 greg 2.20 } else { /* else apply BTDF matrix */
678 greg 2.24 cmtx = cm_multiply(Tmat, imtx);
679 greg 2.20 cm_free(Tmat);
680     }
681 greg 2.24 cm_free(imtx);
682     } else { /* sky vector/matrix only */
683 greg 2.25 cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt);
684 greg 2.24 }
685     /* prepare output stream */
686     if ((ofspec != NULL) & (nsteps == 1) && hasNumberFormat(ofspec)) {
687     sprintf(fnbuf, ofspec, 1);
688     ofspec = fnbuf;
689     }
690     if (ofspec != NULL && !hasNumberFormat(ofspec)) {
691     if ((ofp = fopen(ofspec, "w")) == NULL) {
692     fprintf(stderr, "%s: cannot open '%s' for output\n",
693     progname, ofspec);
694     return(1);
695     }
696     ofspec = NULL; /* only need to open once */
697 greg 2.12 }
698 greg 2.24 if (hasNumberFormat(argv[a])) { /* generating image(s) */
699     if (ofspec == NULL) {
700     SET_FILE_BINARY(ofp);
701     newheader("RADIANCE", ofp);
702     printargs(argc, argv, ofp);
703     fputnow(ofp);
704     }
705     if (nsteps > 1) /* multiple output frames? */
706     for (i = 0; i < nsteps; i++) {
707     CMATRIX *cvec = cm_column(cmtx, i);
708     if (ofspec != NULL) {
709     sprintf(fnbuf, ofspec, i+1);
710     if ((ofp = fopen(fnbuf, "wb")) == NULL) {
711     fprintf(stderr,
712     "%s: cannot open '%s' for output\n",
713     progname, fnbuf);
714     return(1);
715     }
716     newheader("RADIANCE", ofp);
717     printargs(argc, argv, ofp);
718     fputnow(ofp);
719     }
720     fprintf(ofp, "FRAME=%d\n", i+1);
721     if (!sum_images(argv[a], cvec, ofp))
722     return(1);
723     if (ofspec != NULL) {
724     if (fclose(ofp) == EOF) {
725     fprintf(stderr,
726     "%s: error writing to '%s'\n",
727     progname, fnbuf);
728     return(1);
729     }
730     ofp = stdout;
731     }
732     cm_free(cvec);
733     }
734     else if (!sum_images(argv[a], cmtx, ofp))
735 greg 2.1 return(1);
736 greg 2.24 } else { /* generating vector/matrix */
737     CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader);
738     CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
739 greg 2.1 cm_free(Vmat);
740 greg 2.24 if (ofspec != NULL) /* multiple vector files? */
741     for (i = 0; i < nsteps; i++) {
742     CMATRIX *rvec = cm_column(rmtx, i);
743     sprintf(fnbuf, ofspec, i+1);
744     if ((ofp = fopen(fnbuf, "w")) == NULL) {
745     fprintf(stderr,
746     "%s: cannot open '%s' for output\n",
747     progname, fnbuf);
748     return(1);
749     }
750     cm_print(rvec, ofp);
751     if (fclose(ofp) == EOF) {
752     fprintf(stderr,
753     "%s: error writing to '%s'\n",
754     progname, fnbuf);
755     return(1);
756     }
757     ofp = stdout;
758     cm_free(rvec);
759     }
760     else
761     cm_print(rmtx, ofp);
762     cm_free(rmtx);
763     }
764     if (fflush(ofp) == EOF) { /* final clean-up */
765     fprintf(stderr, "%s: write error on output\n", progname);
766     return(1);
767 greg 2.1 }
768 greg 2.24 cm_free(cmtx);
769 greg 2.1 return(0);
770 greg 2.24 userr:
771 greg 2.25 fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-i{f|d}] DCspec [skyf]\n",
772 greg 2.24 progname);
773 greg 2.25 fprintf(stderr, " or: %s [-n nsteps][-o ospec][-i{f|d}] Vspec Tbsdf.xml Dmat.dat [skyf]\n",
774 greg 2.24 progname);
775     return(1);
776 greg 2.1 }