| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: dctimestep.c,v 2.26 2013/01/11 17:54:17 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 |
FILE *fp = stdin; |
| 111 |
CMATRIX *cm; |
| 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 |
#ifdef getc_unlocked |
| 122 |
flockfile(fp); |
| 123 |
#endif |
| 124 |
if (dtype != DTascii) |
| 125 |
SET_FILE_BINARY(fp); /* doesn't really work */ |
| 126 |
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 |
|
| 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 |
if (fseek(fp, startpos, SEEK_SET) < 0) { |
| 153 |
sprintf(errmsg, |
| 154 |
"fseek() error on file '%s'", |
| 155 |
fname); |
| 156 |
error(SYSTEM, errmsg); |
| 157 |
} |
| 158 |
nrows = guessrows; /* we're confident */ |
| 159 |
} |
| 160 |
} |
| 161 |
cm = cm_alloc(guessrows, ncols); |
| 162 |
} else |
| 163 |
cm = cm_alloc(nrows, ncols); |
| 164 |
if (cm == NULL) /* XXX never happens */ |
| 165 |
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 |
if (r >= cm->nrows) /* need more space? */ |
| 171 |
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 |
if ((nrows <= 0) & (r > 0) & !c) { |
| 176 |
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 |
else if (nread && !(nread % cm->ncols)) |
| 204 |
/* 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 |
if (fgetc(fp) != EOF) { |
| 240 |
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 |
#ifdef getc_unlocked |
| 249 |
else |
| 250 |
funlockfile(fp); |
| 251 |
#endif |
| 252 |
return(cm); |
| 253 |
EOFerror: |
| 254 |
sprintf(errmsg, "unexpected EOF reading %s", fname); |
| 255 |
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 |
/* 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 |
error(INTERNAL, "column requested outside matrix"); |
| 270 |
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 |
/* 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 |
static CMATRIX * |
| 306 |
cm_multiply(const CMATRIX *cm1, const CMATRIX *cm2) |
| 307 |
{ |
| 308 |
char *rowcheck=NULL, *colcheck=NULL; |
| 309 |
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 |
/* 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 |
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 |
if (rowcheck != NULL && !rowcheck[dr]) |
| 340 |
continue; |
| 341 |
if (colcheck != NULL && !colcheck[dc]) |
| 342 |
continue; |
| 343 |
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 |
if (rowcheck != NULL) free(rowcheck); |
| 352 |
if (colcheck != NULL) free(colcheck); |
| 353 |
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 |
/* Convert a BSDF to our matrix representation */ |
| 371 |
static CMATRIX * |
| 372 |
cm_bsdf(const COLOR bsdfLamb, const COLOR specCol, const SDMat *bsdf) |
| 373 |
{ |
| 374 |
CMATRIX *cm = cm_alloc(bsdf->nout, bsdf->ninc); |
| 375 |
int nbadohm = 0; |
| 376 |
int nneg = 0; |
| 377 |
int r, c; |
| 378 |
/* loop over incident angles */ |
| 379 |
for (c = 0; c < cm->ncols; c++) { |
| 380 |
const double dom = mBSDF_incohm(bsdf,c); |
| 381 |
/* projected solid angle */ |
| 382 |
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 |
} |
| 392 |
copycolor(mp, specCol); |
| 393 |
scalecolor(mp, f); |
| 394 |
addcolor(mp, bsdfLamb); |
| 395 |
scalecolor(mp, dom); |
| 396 |
} |
| 397 |
} |
| 398 |
if (nneg | nbadohm) { |
| 399 |
sprintf(errmsg, |
| 400 |
"BTDF has %d negatives and %d bad incoming solid angles", |
| 401 |
nneg, nbadohm); |
| 402 |
error(WARNING, errmsg); |
| 403 |
} |
| 404 |
return(cm); |
| 405 |
} |
| 406 |
|
| 407 |
/* 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 |
/* Load and convert a matrix BSDF from the given XML file */ |
| 471 |
static CMATRIX * |
| 472 |
cm_loadBSDF(char *fname, COLOR cLamb) |
| 473 |
{ |
| 474 |
CMATRIX *Tmat; |
| 475 |
char *fpath; |
| 476 |
int recip; |
| 477 |
SDError ec; |
| 478 |
SDData myBSDF; |
| 479 |
SDSpectralDF *tdf; |
| 480 |
COLOR bsdfLamb, specCol; |
| 481 |
/* 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 |
SDclearBSDF(&myBSDF, fname); /* load XML and check type */ |
| 488 |
ec = SDloadFile(&myBSDF, fpath); |
| 489 |
if (ec) |
| 490 |
error(USER, transSDError(ec)); |
| 491 |
ccy2rgb(&myBSDF.tLamb.spec, myBSDF.tLamb.cieY/PI, bsdfLamb); |
| 492 |
recip = (myBSDF.tb == NULL); |
| 493 |
tdf = recip ? myBSDF.tf : myBSDF.tb; |
| 494 |
if (tdf == NULL) { /* no non-Lambertian transmission? */ |
| 495 |
if (cLamb != NULL) |
| 496 |
copycolor(cLamb, bsdfLamb); |
| 497 |
SDfreeBSDF(&myBSDF); |
| 498 |
return(NULL); |
| 499 |
} |
| 500 |
if (tdf->ncomp != 1 || tdf->comp[0].func != &SDhandleMtx) { |
| 501 |
sprintf(errmsg, "unsupported BSDF '%s'", fpath); |
| 502 |
error(USER, errmsg); |
| 503 |
} |
| 504 |
/* convert BTDF to matrix */ |
| 505 |
ccy2rgb(&tdf->comp[0].cspec[0], 1., specCol); |
| 506 |
Tmat = recip ? cm_bsdf_recip(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist) |
| 507 |
: cm_bsdf(bsdfLamb, specCol, (SDMat *)tdf->comp[0].dist); |
| 508 |
if (cLamb != NULL) /* Lambertian is included */ |
| 509 |
setcolor(cLamb, .0, .0, .0); |
| 510 |
/* free BSDF and return */ |
| 511 |
SDfreeBSDF(&myBSDF); |
| 512 |
return(Tmat); |
| 513 |
} |
| 514 |
|
| 515 |
/* Sum together a set of images and write result to fout */ |
| 516 |
static int |
| 517 |
sum_images(const char *fspec, const CMATRIX *cv, FILE *fout) |
| 518 |
{ |
| 519 |
int myDT = DTfromHeader; |
| 520 |
COLOR *scanline = NULL; |
| 521 |
CMATRIX *pmat = NULL; |
| 522 |
int myXR=0, myYR=0; |
| 523 |
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 |
/* check for zero */ |
| 534 |
if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) && |
| 535 |
(myDT != DTfromHeader) | (i < cv->nrows-1)) |
| 536 |
continue; |
| 537 |
/* 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 |
/* finish header */ |
| 559 |
fputformat(myDT==DTrgbe ? COLRFMT : CIEFMT, fout); |
| 560 |
fputc('\n', fout); |
| 561 |
fprtresolu(myXR, myYR, fout); |
| 562 |
fflush(fout); |
| 563 |
} 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 |
if (fwritescan((COLOR *)cm_lval(pmat, y, 0), myXR, fout) < 0) |
| 588 |
return(0); |
| 589 |
cm_free(pmat); /* all done */ |
| 590 |
return(fflush(fout) == 0); |
| 591 |
} |
| 592 |
|
| 593 |
/* check to see if a string contains a %d or %o specification */ |
| 594 |
static int |
| 595 |
hasNumberFormat(const char *s) |
| 596 |
{ |
| 597 |
if (s == NULL) |
| 598 |
return(0); |
| 599 |
|
| 600 |
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 |
} |
| 617 |
|
| 618 |
int |
| 619 |
main(int argc, char *argv[]) |
| 620 |
{ |
| 621 |
int skyfmt = DTascii; |
| 622 |
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 |
|
| 629 |
progname = argv[0]; |
| 630 |
/* get options */ |
| 631 |
for (a = 1; a < argc && argv[a][0] == '-'; a++) |
| 632 |
switch (argv[a][1]) { |
| 633 |
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 |
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 |
default: |
| 657 |
goto userr; |
| 658 |
} |
| 659 |
if ((argc-a < 1) | (argc-a > 4)) |
| 660 |
goto userr; |
| 661 |
|
| 662 |
if (argc-a > 2) { /* VTDs expression */ |
| 663 |
CMATRIX *smtx, *Dmat, *Tmat, *imtx; |
| 664 |
COLOR tLamb; |
| 665 |
/* get sky vector/matrix */ |
| 666 |
smtx = cm_load(argv[a+3], 0, nsteps, skyfmt); |
| 667 |
/* load BSDF */ |
| 668 |
Tmat = cm_loadBSDF(argv[a+1], tLamb); |
| 669 |
/* load Daylight matrix */ |
| 670 |
Dmat = cm_load(argv[a+2], Tmat==NULL ? 0 : Tmat->ncols, |
| 671 |
smtx->nrows, DTfromHeader); |
| 672 |
/* multiply vector through */ |
| 673 |
imtx = cm_multiply(Dmat, smtx); |
| 674 |
cm_free(Dmat); cm_free(smtx); |
| 675 |
if (Tmat == NULL) { /* diffuse only */ |
| 676 |
cmtx = cm_scale(imtx, tLamb); |
| 677 |
} else { /* else apply BTDF matrix */ |
| 678 |
cmtx = cm_multiply(Tmat, imtx); |
| 679 |
cm_free(Tmat); |
| 680 |
} |
| 681 |
cm_free(imtx); |
| 682 |
} else { /* sky vector/matrix only */ |
| 683 |
cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt); |
| 684 |
} |
| 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 |
} |
| 698 |
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 |
return(1); |
| 736 |
} else { /* generating vector/matrix */ |
| 737 |
CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader); |
| 738 |
CMATRIX *rmtx = cm_multiply(Vmat, cmtx); |
| 739 |
cm_free(Vmat); |
| 740 |
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 |
} |
| 768 |
cm_free(cmtx); |
| 769 |
return(0); |
| 770 |
userr: |
| 771 |
fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-i{f|d}] DCspec [skyf]\n", |
| 772 |
progname); |
| 773 |
fprintf(stderr, " or: %s [-n nsteps][-o ospec][-i{f|d}] Vspec Tbsdf.xml Dmat.dat [skyf]\n", |
| 774 |
progname); |
| 775 |
return(1); |
| 776 |
} |
