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 |
} |