| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: ranimove1.c,v 3.4 2003/06/30 14:59:13 schorsch Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* ranimove1.c |
| 6 |
* |
| 7 |
* Basic frame rendering routines for ranimate(1). |
| 8 |
* |
| 9 |
* Created by Gregory Ward on Wed Jan 08 2003. |
| 10 |
*/ |
| 11 |
|
| 12 |
#include "copyright.h" |
| 13 |
|
| 14 |
#include <string.h> |
| 15 |
|
| 16 |
#include "platform.h" |
| 17 |
#include "ranimove.h" |
| 18 |
#include "otypes.h" |
| 19 |
#include "random.h" |
| 20 |
|
| 21 |
double acctab[256]; /* accuracy value table */ |
| 22 |
|
| 23 |
int hres, vres; /* frame resolution (fcur) */ |
| 24 |
double pixaspect; /* pixel aspect ratio */ |
| 25 |
|
| 26 |
VIEW vw; /* view for this frame */ |
| 27 |
COLOR *cbuffer; /* color at each pixel */ |
| 28 |
float *zbuffer; /* depth at each pixel */ |
| 29 |
OBJECT *obuffer; /* object id at each pixel */ |
| 30 |
short *xmbuffer; /* x motion at each pixel */ |
| 31 |
short *ymbuffer; /* y motion at each pixel */ |
| 32 |
BYTE *abuffer; /* accuracy at each pixel */ |
| 33 |
BYTE *sbuffer; /* sample count per pixel */ |
| 34 |
|
| 35 |
VIEW vwprev; /* last frame's view */ |
| 36 |
COLOR *cprev; /* last frame colors */ |
| 37 |
float *zprev; /* last frame depth */ |
| 38 |
OBJECT *oprev; /* last frame objects */ |
| 39 |
BYTE *aprev; /* last frame accuracy */ |
| 40 |
|
| 41 |
float *cerrmap; /* conspicuous error map */ |
| 42 |
COLOR *val2map; /* value-squared map for variance */ |
| 43 |
|
| 44 |
double frm_stop; /* when to stop rendering this frame */ |
| 45 |
|
| 46 |
double hlsmax; /* maximum high-level saliency this frame */ |
| 47 |
|
| 48 |
|
| 49 |
void |
| 50 |
write_map(mp, fn) /* write out float map (debugging) */ |
| 51 |
float *mp; |
| 52 |
char *fn; |
| 53 |
{ |
| 54 |
FILE *fp = fopen(fn, "w"); |
| 55 |
COLOR scanbuf[2048]; |
| 56 |
int x, y; |
| 57 |
|
| 58 |
if (fp == NULL) |
| 59 |
return; |
| 60 |
newheader("RADIANCE", fp); |
| 61 |
fputformat(COLRFMT, fp); |
| 62 |
fputc('\n', fp); /* end header */ |
| 63 |
fprtresolu(hres, vres, fp); |
| 64 |
for (y = vres; y--; ) { /* write scanlines */ |
| 65 |
float *bp = mp + (y+1)*hres - 1; |
| 66 |
for (x = hres; x--; bp--) |
| 67 |
setcolor(scanbuf[x], *bp, *bp, *bp); |
| 68 |
if (fwritescan(scanbuf, hres, fp) < 0) |
| 69 |
break; |
| 70 |
} |
| 71 |
fclose(fp); |
| 72 |
} |
| 73 |
|
| 74 |
|
| 75 |
static void |
| 76 |
next_frame() /* prepare next frame buffer */ |
| 77 |
{ |
| 78 |
VIEW *fv; |
| 79 |
char *err; |
| 80 |
/* get previous view */ |
| 81 |
if (vw.type != 0) |
| 82 |
vwprev = vw; |
| 83 |
else if (fcur > 1 && (fv = getview(fcur-1)) != NULL) { |
| 84 |
vwprev = *fv; |
| 85 |
if (setview(&vwprev) != NULL) |
| 86 |
vwprev.type = 0; |
| 87 |
} |
| 88 |
/* get current view */ |
| 89 |
if ((fv = getview(fcur)) == NULL) { |
| 90 |
sprintf(errmsg, "cannot get view for frame %d", fcur); |
| 91 |
error(USER, errmsg); |
| 92 |
} |
| 93 |
vw = *fv; |
| 94 |
if ((err = setview(&vw)) != NULL) { |
| 95 |
sprintf(errmsg, "view error at frame %d: %s", fcur, err); |
| 96 |
error(USER, errmsg); |
| 97 |
} |
| 98 |
if (cbuffer == NULL) { |
| 99 |
/* compute resolution and allocate */ |
| 100 |
switch (sscanf(vval(RESOLUTION), "%d %d %lf", |
| 101 |
&hres, &vres, &pixaspect)) { |
| 102 |
case 1: |
| 103 |
vres = hres; |
| 104 |
/* fall through */ |
| 105 |
case 2: |
| 106 |
pixaspect = 1.; |
| 107 |
/* fall through */ |
| 108 |
case 3: |
| 109 |
if ((hres > 0 & vres > 0)) |
| 110 |
break; |
| 111 |
/* fall through */ |
| 112 |
default: |
| 113 |
sprintf(errmsg, "bad %s value", vnam(RESOLUTION)); |
| 114 |
error(USER, errmsg); |
| 115 |
} |
| 116 |
normaspect(viewaspect(&vw), &pixaspect, &hres, &vres); |
| 117 |
cbuffer = (COLOR *)malloc(sizeof(COLOR)*hres*vres); |
| 118 |
zbuffer = (float *)malloc(sizeof(float)*hres*vres); |
| 119 |
obuffer = (OBJECT *)malloc(sizeof(OBJECT)*hres*vres); |
| 120 |
xmbuffer = (short *)malloc(sizeof(short)*hres*vres); |
| 121 |
ymbuffer = (short *)malloc(sizeof(short)*hres*vres); |
| 122 |
abuffer = (BYTE *)calloc(hres*vres, sizeof(BYTE)); |
| 123 |
sbuffer = (BYTE *)calloc(hres*vres, sizeof(BYTE)); |
| 124 |
cprev = (COLOR *)malloc(sizeof(COLOR)*hres*vres); |
| 125 |
zprev = (float *)malloc(sizeof(float)*hres*vres); |
| 126 |
oprev = (OBJECT *)malloc(sizeof(OBJECT)*hres*vres); |
| 127 |
aprev = (BYTE *)malloc(sizeof(BYTE)*hres*vres); |
| 128 |
if ((cbuffer==NULL | zbuffer==NULL | obuffer==NULL | |
| 129 |
xmbuffer==NULL | ymbuffer==NULL | |
| 130 |
abuffer==NULL | sbuffer==NULL | |
| 131 |
cprev==NULL | zprev == NULL | |
| 132 |
oprev==NULL | aprev==NULL)) |
| 133 |
error(SYSTEM, "out of memory in init_frame"); |
| 134 |
frm_stop = getTime() + rtperfrm; |
| 135 |
} else { |
| 136 |
COLOR *cp; /* else just swap buffers */ |
| 137 |
float *fp; |
| 138 |
OBJECT *op; |
| 139 |
BYTE *bp; |
| 140 |
cp = cprev; cprev = cbuffer; cbuffer = cp; |
| 141 |
fp = zprev; zprev = zbuffer; zbuffer = fp; |
| 142 |
op = oprev; oprev = obuffer; obuffer = op; |
| 143 |
bp = aprev; aprev = abuffer; abuffer = bp; |
| 144 |
memset(abuffer, '\0', sizeof(BYTE)*hres*vres); |
| 145 |
memset(sbuffer, '\0', sizeof(BYTE)*hres*vres); |
| 146 |
frm_stop += rtperfrm; |
| 147 |
} |
| 148 |
cerrmap = NULL; |
| 149 |
val2map = NULL; |
| 150 |
} |
| 151 |
|
| 152 |
|
| 153 |
#define SAMPDIST 3 /* Maximum distance to neighbor sample */ |
| 154 |
#define SAMPDIST2 (SAMPDIST*SAMPDIST) |
| 155 |
|
| 156 |
|
| 157 |
static int |
| 158 |
sample_here(x, y) /* 4x4 quincunx sample at this pixel? */ |
| 159 |
register int x, y; |
| 160 |
{ |
| 161 |
if (y & 0x1) /* every other row has samples */ |
| 162 |
return(0); |
| 163 |
if (y & 0x3) /* every fourth row is offset */ |
| 164 |
x += 2; |
| 165 |
return((x & 0x3) == 0); /* every fourth column is sampled */ |
| 166 |
} |
| 167 |
|
| 168 |
|
| 169 |
void |
| 170 |
sample_pos(hv, x, y, sn) /* compute jittered sample position */ |
| 171 |
double hv[2]; |
| 172 |
int x, y; |
| 173 |
int sn; |
| 174 |
{ |
| 175 |
int hl[2]; |
| 176 |
|
| 177 |
hl[0] = x; hl[1] = y; |
| 178 |
multisamp(hv, 2, urand(ilhash(hl,2) + sn)); |
| 179 |
hv[0] = ((double)x + hv[0]) / (double)hres; |
| 180 |
hv[1] = ((double)y + hv[1]) / (double)vres; |
| 181 |
} |
| 182 |
|
| 183 |
|
| 184 |
double |
| 185 |
sample_wt(xo, yo) /* compute interpolant sample weight */ |
| 186 |
int xo, yo; |
| 187 |
{ |
| 188 |
static double etab[400]; |
| 189 |
int rad2 = xo*xo + yo*yo; |
| 190 |
int i; |
| 191 |
|
| 192 |
if (etab[0] <= FTINY) /* initialize exponent table */ |
| 193 |
for (i = 400; i--; ) |
| 194 |
etab[i] = exp(-0.1*i); |
| 195 |
|
| 196 |
/* look up Gaussian */ |
| 197 |
i = (int)((10.*3./(double)SAMPDIST2)*rad2 + .5); |
| 198 |
if (i >= 400) |
| 199 |
return(0.0); |
| 200 |
return(etab[i]); |
| 201 |
} |
| 202 |
|
| 203 |
|
| 204 |
static int |
| 205 |
offset_cmp(p1, p2) /* compare offset distances */ |
| 206 |
const void *p1, *p2; |
| 207 |
{ |
| 208 |
return(*(const int *)p1 - *(const int *)p2); |
| 209 |
} |
| 210 |
|
| 211 |
|
| 212 |
int |
| 213 |
getclosest(iarr, nc, x, y) /* get nc closest neighbors on same object */ |
| 214 |
int *iarr; |
| 215 |
int nc; |
| 216 |
int x, y; |
| 217 |
{ |
| 218 |
#define NSCHECK ((2*SAMPDIST+1)*(2*SAMPDIST+1)) |
| 219 |
static int hro, vro; |
| 220 |
static int ioffs[NSCHECK]; |
| 221 |
OBJECT myobj; |
| 222 |
int i0, nf; |
| 223 |
register int i, j; |
| 224 |
/* get our object number */ |
| 225 |
myobj = obuffer[fndx(x, y)]; |
| 226 |
/* special case for borders */ |
| 227 |
if ((x < SAMPDIST | x >= hres-SAMPDIST | |
| 228 |
y < SAMPDIST | y >= vres-SAMPDIST)) { |
| 229 |
int tndx[NSCHECK][2]; |
| 230 |
nf = 0; |
| 231 |
for (j = y - SAMPDIST; j <= y + SAMPDIST; j++) { |
| 232 |
if (j >= vres) break; |
| 233 |
if (j < 0) j = 0; |
| 234 |
for (i = x - SAMPDIST; i <= x + SAMPDIST; i++) { |
| 235 |
if (i >= hres) break; |
| 236 |
if (i < 0) i = 0; |
| 237 |
i0 = fndx(i, j); |
| 238 |
if (!sbuffer[i0]) |
| 239 |
continue; |
| 240 |
if ((myobj != OVOID & obuffer[i0] != myobj)) |
| 241 |
continue; |
| 242 |
tndx[nf][0] = (i-x)*(i-x) + (j-y)*(j-y); |
| 243 |
tndx[nf][1] = i0; |
| 244 |
nf++; |
| 245 |
} |
| 246 |
} |
| 247 |
qsort((void *)tndx, nf, 2*sizeof(int), offset_cmp); |
| 248 |
if (nf > nc) |
| 249 |
nf = nc; |
| 250 |
for (i = nf; i--; ) |
| 251 |
iarr[i] = tndx[i][1]; |
| 252 |
return(nf); |
| 253 |
} |
| 254 |
/* initialize offset array */ |
| 255 |
if ((hres != hro | vres != vro)) { |
| 256 |
int toffs[NSCHECK][2]; |
| 257 |
i0 = fndx(SAMPDIST, SAMPDIST); |
| 258 |
nf = 0; |
| 259 |
for (i = 0; i <= 2*SAMPDIST; i++) |
| 260 |
for (j = 0; j <= 2*SAMPDIST; j++) { |
| 261 |
toffs[nf][0] = (i-SAMPDIST)*(i-SAMPDIST) + |
| 262 |
(j-SAMPDIST)*(j-SAMPDIST); |
| 263 |
toffs[nf][1] = fndx(i, j) - i0; |
| 264 |
nf++; |
| 265 |
} |
| 266 |
qsort((void *)toffs, nf, 2*sizeof(int), offset_cmp); |
| 267 |
for (i = NSCHECK; i--; ) |
| 268 |
ioffs[i] = toffs[i][1]; |
| 269 |
hro = hres; |
| 270 |
vro = vres; |
| 271 |
} |
| 272 |
/* find up to nc neighbors */ |
| 273 |
i0 = fndx(x, y); |
| 274 |
for (j = 0, nf = 0; (j < NSCHECK & nf < nc); j++) { |
| 275 |
i = i0 + ioffs[j]; |
| 276 |
if (sbuffer[i] && (myobj == OVOID | obuffer[i] == myobj)) |
| 277 |
iarr[nf++] = i; |
| 278 |
} |
| 279 |
/* return number found */ |
| 280 |
return(nf); |
| 281 |
#undef NSCHECK |
| 282 |
} |
| 283 |
|
| 284 |
|
| 285 |
static void |
| 286 |
setmotion(n, wpos) /* compute motion vector for this pixel */ |
| 287 |
register int n; |
| 288 |
FVECT wpos; |
| 289 |
{ |
| 290 |
FVECT ovp; |
| 291 |
MAT4 xfm; |
| 292 |
double d; |
| 293 |
int moi; |
| 294 |
int xp, yp; |
| 295 |
/* ID object and update maximum HLS */ |
| 296 |
moi = getmove(obuffer[n]); |
| 297 |
if (moi >= 0 && obj_move[moi].cprio > hlsmax) |
| 298 |
hlsmax = obj_move[moi].cprio; |
| 299 |
if (vwprev.type == 0) /* return leaves MO_UNK */ |
| 300 |
return; |
| 301 |
if (moi >= 0) { /* move object point back */ |
| 302 |
multp3(ovp, wpos, obj_move[moi].bxfm); |
| 303 |
wpos = ovp; |
| 304 |
} |
| 305 |
viewloc(ovp, &vwprev, wpos); |
| 306 |
if (ovp[2] <= FTINY) |
| 307 |
return; |
| 308 |
xp = (int)(ovp[0]*hres); |
| 309 |
yp = (int)(ovp[1]*vres); |
| 310 |
xmbuffer[n] = xp - (n % hres); |
| 311 |
ymbuffer[n] = yp - (n / hres); |
| 312 |
if ((xp < 0 | xp >= hres)) |
| 313 |
return; |
| 314 |
if ((yp < 0 | yp >= vres)) |
| 315 |
return; |
| 316 |
n = fndx(xp, yp); |
| 317 |
if ((zprev[n] < 0.97*ovp[2] | zprev[n] > 1.03*ovp[2])) |
| 318 |
oprev[n] = OVOID; /* assume it's a bad match */ |
| 319 |
} |
| 320 |
|
| 321 |
|
| 322 |
static void |
| 323 |
init_frame_sample() /* sample our initial frame */ |
| 324 |
{ |
| 325 |
RAY ir; |
| 326 |
int x, y; |
| 327 |
register int n; |
| 328 |
|
| 329 |
if (!silent) { |
| 330 |
printf("\tComputing initial samples..."); |
| 331 |
fflush(stdout); |
| 332 |
} |
| 333 |
hlsmax = CSF_SMN; |
| 334 |
for (y = vres; y--; ) |
| 335 |
for (x = hres; x--; ) { |
| 336 |
double hv[2]; |
| 337 |
n = fndx(x, y); |
| 338 |
xmbuffer[n] = MO_UNK; |
| 339 |
ymbuffer[n] = MO_UNK; |
| 340 |
sample_pos(hv, x, y, 0); |
| 341 |
ir.rmax = viewray(ir.rorg, ir.rdir, &vw, hv[0], hv[1]); |
| 342 |
if (ir.rmax < -FTINY) { |
| 343 |
setcolor(cbuffer[n], 0., 0., 0.); |
| 344 |
zbuffer[n] = FHUGE; |
| 345 |
obuffer[n] = OVOID; |
| 346 |
abuffer[n] = ADISTANT; |
| 347 |
continue; |
| 348 |
} |
| 349 |
if (!sample_here(x, y)) { /* just cast */ |
| 350 |
rayorigin(&ir, NULL, PRIMARY, 1.0); |
| 351 |
if (!localhit(&ir, &thescene)) { |
| 352 |
if (ir.ro != &Aftplane) |
| 353 |
sourcehit(&ir); |
| 354 |
copycolor(cbuffer[n], ir.rcol); |
| 355 |
zbuffer[n] = ir.rot; |
| 356 |
obuffer[n] = ir.robj; |
| 357 |
abuffer[n] = ADISTANT; |
| 358 |
sbuffer[n] = 1; |
| 359 |
} else { |
| 360 |
zbuffer[n] = ir.rot; |
| 361 |
obuffer[n] = ir.robj; |
| 362 |
setmotion(n, ir.rop); |
| 363 |
} |
| 364 |
continue; |
| 365 |
} |
| 366 |
if (nprocs > 1) { /* get sample */ |
| 367 |
int rval; |
| 368 |
rayorigin(&ir, NULL, PRIMARY, 1.0); |
| 369 |
ir.rno = n; |
| 370 |
rval = ray_pqueue(&ir); |
| 371 |
if (!rval) |
| 372 |
continue; |
| 373 |
if (rval < 0) |
| 374 |
quit(1); |
| 375 |
n = ir.rno; |
| 376 |
} else |
| 377 |
ray_trace(&ir); |
| 378 |
copycolor(cbuffer[n], ir.rcol); |
| 379 |
zbuffer[n] = ir.rot; |
| 380 |
obuffer[n] = ir.robj; |
| 381 |
sbuffer[n] = 1; |
| 382 |
if (ir.rot >= FHUGE) |
| 383 |
abuffer[n] = ADISTANT; |
| 384 |
else { |
| 385 |
abuffer[n] = ALOWQ; |
| 386 |
setmotion(n, ir.rop); |
| 387 |
} |
| 388 |
} |
| 389 |
if (nprocs > 1) /* get stragglers */ |
| 390 |
while (ray_presult(&ir, 0)) { |
| 391 |
n = ir.rno; |
| 392 |
copycolor(cbuffer[n], ir.rcol); |
| 393 |
zbuffer[n] = ir.rot; |
| 394 |
obuffer[n] = ir.robj; |
| 395 |
sbuffer[n] = 1; |
| 396 |
if (ir.rot >= FHUGE) |
| 397 |
abuffer[n] = ADISTANT; |
| 398 |
else { |
| 399 |
abuffer[n] = ALOWQ; |
| 400 |
setmotion(n, ir.rop); |
| 401 |
} |
| 402 |
} |
| 403 |
/* ambiguate object boundaries */ |
| 404 |
for (y = vres-1; y--; ) |
| 405 |
for (x = hres-1; x--; ) { |
| 406 |
OBJECT obj; |
| 407 |
n = fndx(x, y); |
| 408 |
if ((obj = obuffer[n]) == OVOID) |
| 409 |
continue; |
| 410 |
if ((obuffer[n+1] != OVOID & obuffer[n+1] != obj)) { |
| 411 |
obuffer[n] = OVOID; |
| 412 |
obuffer[n+1] = OVOID; |
| 413 |
} |
| 414 |
if ((obuffer[n+hres] != OVOID & obuffer[n+hres] != obj)) { |
| 415 |
obuffer[n] = OVOID; |
| 416 |
obuffer[n+hres] = OVOID; |
| 417 |
} |
| 418 |
} |
| 419 |
|
| 420 |
if (!silent) |
| 421 |
printf("done\n"); |
| 422 |
} |
| 423 |
|
| 424 |
|
| 425 |
int |
| 426 |
getambcolor(clr, obj) /* get ambient color for object if we can */ |
| 427 |
COLOR clr; |
| 428 |
int obj; |
| 429 |
{ |
| 430 |
register OBJREC *op; |
| 431 |
|
| 432 |
if (obj == OVOID) |
| 433 |
return(0); |
| 434 |
op = objptr(obj); |
| 435 |
if ((op->otype == OBJ_INSTANCE & op->omod == OVOID)) |
| 436 |
return(0); |
| 437 |
/* search for material */ |
| 438 |
do { |
| 439 |
if (op->omod == OVOID || ofun[op->otype].flags & T_X) |
| 440 |
return(0); |
| 441 |
op = objptr(op->omod); |
| 442 |
} while (!ismaterial(op->otype)); |
| 443 |
/* |
| 444 |
* Since this routine is called to compute the difference |
| 445 |
* from rendering with and without interreflections, |
| 446 |
* we don't want to return colors for materials that are |
| 447 |
* explicitly excluded from the HQ ambient calculation. |
| 448 |
*/ |
| 449 |
if (hirendparams.ambincl >= 0) { |
| 450 |
int i; |
| 451 |
char *lv; |
| 452 |
for (i = 0; (lv = rpambmod(&hirendparams,i)) != NULL; i++) |
| 453 |
if (lv[0] == op->oname[0] && |
| 454 |
!strcmp(lv+1, op->oname+1)) |
| 455 |
break; |
| 456 |
if ((lv != NULL) != hirendparams.ambincl) |
| 457 |
return(0); |
| 458 |
} |
| 459 |
switch (op->otype) { |
| 460 |
case MAT_PLASTIC: |
| 461 |
case MAT_METAL: |
| 462 |
case MAT_PLASTIC2: |
| 463 |
case MAT_METAL2: |
| 464 |
case MAT_PFUNC: |
| 465 |
case MAT_MFUNC: |
| 466 |
case MAT_PDATA: |
| 467 |
case MAT_MDATA: |
| 468 |
case MAT_TRANS: |
| 469 |
case MAT_TRANS2: |
| 470 |
case MAT_TFUNC: |
| 471 |
case MAT_TDATA: |
| 472 |
if (op->oargs.nfargs < 3) |
| 473 |
return(0); |
| 474 |
setcolor(clr, op->oargs.farg[0], op->oargs.farg[1], |
| 475 |
op->oargs.farg[2]); |
| 476 |
return(1); |
| 477 |
case MAT_BRTDF: |
| 478 |
if (op->oargs.nfargs < 6) |
| 479 |
return(0); |
| 480 |
setcolor(clr, op->oargs.farg[0]+op->oargs.farg[3], |
| 481 |
op->oargs.farg[1]+op->oargs.farg[4], |
| 482 |
op->oargs.farg[2]+op->oargs.farg[5]); |
| 483 |
scalecolor(clr, 0.5); |
| 484 |
return(1); |
| 485 |
case MAT_LIGHT: |
| 486 |
case MAT_GLOW: |
| 487 |
case MAT_ILLUM: |
| 488 |
setcolor(clr, 0., 0., 0.); |
| 489 |
return(1); |
| 490 |
} |
| 491 |
return(0); |
| 492 |
} |
| 493 |
|
| 494 |
|
| 495 |
double |
| 496 |
estimaterr(cs, cs2, ns, ns0) /* estimate relative error from samples */ |
| 497 |
COLOR cs, cs2; |
| 498 |
int ns; |
| 499 |
{ |
| 500 |
double d, d2, brt; |
| 501 |
|
| 502 |
if (ns <= 1 || (brt = bright(cs)/ns) < 1e-14) |
| 503 |
return(1.0); |
| 504 |
/* use largest of RGB std. dev. */ |
| 505 |
d2 = colval(cs2,RED) - colval(cs,RED)*colval(cs,RED)/ns; |
| 506 |
d = colval(cs2,GRN) - colval(cs,GRN)*colval(cs,GRN)/ns; |
| 507 |
if (d > d2) d2 = d; |
| 508 |
d = colval(cs2,BLU) - colval(cs,BLU)*colval(cs,BLU)/ns; |
| 509 |
if (d > d2) d2 = d; |
| 510 |
/* use s.d. if <= 1 central sample */ |
| 511 |
if (ns0 <= 1) |
| 512 |
return(sqrt(d2/(ns-1))/brt); |
| 513 |
/* use s.d./sqrt(ns0) otherwise */ |
| 514 |
return(sqrt(d2/((ns-1)*ns0))/brt); |
| 515 |
} |
| 516 |
|
| 517 |
|
| 518 |
double |
| 519 |
comperr(neigh, nc, ns0) /* estimate relative error in neighborhood */ |
| 520 |
int *neigh; |
| 521 |
int nc; |
| 522 |
int ns0; |
| 523 |
{ |
| 524 |
COLOR csum, csum2; |
| 525 |
COLOR ctmp; |
| 526 |
int i; |
| 527 |
int ns; |
| 528 |
register int n; |
| 529 |
/* add together samples */ |
| 530 |
setcolor(csum, 0., 0., 0.); |
| 531 |
setcolor(csum2, 0., 0., 0.); |
| 532 |
for (i = 0, ns = 0; (i < nc & ns < NSAMPOK); i++) { |
| 533 |
n = neigh[i]; |
| 534 |
addcolor(csum, cbuffer[n]); |
| 535 |
if (val2map != NULL) { |
| 536 |
addcolor(csum2, val2map[n]); |
| 537 |
ns += sbuffer[n]; |
| 538 |
continue; |
| 539 |
} |
| 540 |
if (sbuffer[n] != 1) |
| 541 |
error(CONSISTENCY, "bad count in comperr"); |
| 542 |
setcolor(ctmp, |
| 543 |
colval(cbuffer[n],RED)*colval(cbuffer[n],RED), |
| 544 |
colval(cbuffer[n],GRN)*colval(cbuffer[n],GRN), |
| 545 |
colval(cbuffer[n],BLU)*colval(cbuffer[n],BLU)); |
| 546 |
addcolor(csum2, ctmp); |
| 547 |
ns++; |
| 548 |
} |
| 549 |
return(estimaterr(csum, csum2, ns, ns0)); |
| 550 |
} |
| 551 |
|
| 552 |
|
| 553 |
void |
| 554 |
comp_frame_error() /* initialize frame error values */ |
| 555 |
{ |
| 556 |
BYTE *edone = NULL; |
| 557 |
COLOR objamb; |
| 558 |
double eest; |
| 559 |
int neigh[NSAMPOK]; |
| 560 |
int nc; |
| 561 |
int x, y, i, j; |
| 562 |
register int n; |
| 563 |
|
| 564 |
if (!silent) { |
| 565 |
printf("\tComputing error map\n"); |
| 566 |
fflush(stdout); |
| 567 |
} |
| 568 |
if (acctab[0] <= FTINY) /* initialize accuracy table */ |
| 569 |
for (i = 256; i--; ) |
| 570 |
acctab[i] = errorf(i); |
| 571 |
/* estimate sample error */ |
| 572 |
if (!curparams->ambounce && hirendparams.ambounce) { |
| 573 |
/* |
| 574 |
* Our error estimate for the initial value is based |
| 575 |
* on the assumption that most of it comes from the |
| 576 |
* lack of an interreflection calculation. The relative |
| 577 |
* error should be less than the ambient value divided |
| 578 |
* by the returned ray value -- we take half of this. |
| 579 |
*/ |
| 580 |
edone = (BYTE *)calloc(hres*vres, sizeof(BYTE)); |
| 581 |
for (y = vres; y--; ) |
| 582 |
for (x = hres; x--; ) { |
| 583 |
n = fndx(x, y); |
| 584 |
if ((abuffer[n] != ALOWQ | obuffer[n] == OVOID)) |
| 585 |
continue; |
| 586 |
if (!getambcolor(objamb, obuffer[n])) |
| 587 |
continue; |
| 588 |
multcolor(objamb, ambval); |
| 589 |
if ((eest = bright(cbuffer[n])) <= FTINY) |
| 590 |
continue; |
| 591 |
eest = bright(objamb) / eest; |
| 592 |
if (eest > 1.) /* should we report this? */ |
| 593 |
continue; |
| 594 |
eest *= 0.50; /* use 50% ambient error */ |
| 595 |
i = errori(eest); |
| 596 |
if (i < AMIN) i = AMIN; |
| 597 |
else if (i >= ADISTANT/2) i = ADISTANT/2-1; |
| 598 |
abuffer[n] = i; |
| 599 |
edone[n] = 1; |
| 600 |
} |
| 601 |
} |
| 602 |
/* final statistical estimate */ |
| 603 |
for (y = vres; y--; ) |
| 604 |
for (x = hres; x--; ) { |
| 605 |
n = fndx(x, y); |
| 606 |
if (abuffer[n] == ADISTANT) |
| 607 |
continue; /* don't update these */ |
| 608 |
if (edone != NULL && edone[n]) |
| 609 |
continue; /* already done this */ |
| 610 |
if (sbuffer[n] >= 255) { |
| 611 |
abuffer[n] = ADISTANT; |
| 612 |
continue; /* can't take any more */ |
| 613 |
} |
| 614 |
nc = getclosest(neigh, NSAMPOK, x, y); |
| 615 |
if (nc <= 0) { |
| 616 |
abuffer[n] = ANOVAL; |
| 617 |
continue; /* no clue what to do for him */ |
| 618 |
} |
| 619 |
i = errori(comperr(neigh, nc, sbuffer[n])); |
| 620 |
if (i < AMIN) i = AMIN; |
| 621 |
else if (i >= ADISTANT) i = ADISTANT-1; |
| 622 |
abuffer[n] = i; |
| 623 |
/* can't be better than closest */ |
| 624 |
if (i < abuffer[neigh[0]] && abuffer[neigh[0]] >= AMIN) |
| 625 |
abuffer[n] = abuffer[neigh[0]]; |
| 626 |
} |
| 627 |
if (edone != NULL) |
| 628 |
free((void *)edone); |
| 629 |
} |
| 630 |
|
| 631 |
|
| 632 |
void |
| 633 |
init_frame() /* render base (low quality) frame */ |
| 634 |
{ |
| 635 |
int restart; |
| 636 |
|
| 637 |
/* allocate/swap buffers */ |
| 638 |
next_frame(); |
| 639 |
/* check rendering status */ |
| 640 |
restart = (!nobjects || vdef(MOVE)); |
| 641 |
if (!restart && curparams != &lorendparams && nprocs > 1) |
| 642 |
restart = -1; |
| 643 |
if (restart > 0) { |
| 644 |
if (nprocs > 1) |
| 645 |
ray_pdone(1); |
| 646 |
else |
| 647 |
ray_done(1); |
| 648 |
} |
| 649 |
/* post low quality parameters */ |
| 650 |
if (curparams != &lorendparams) |
| 651 |
ray_restore(curparams = &lorendparams); |
| 652 |
if (restart > 0) { /* load new octree */ |
| 653 |
char *oct = getoctspec(fcur); |
| 654 |
if (oct == NULL) { |
| 655 |
sprintf(errmsg, "cannot get scene for frame %d", fcur); |
| 656 |
error(USER, errmsg); |
| 657 |
} |
| 658 |
if (!silent) { |
| 659 |
printf("\tLoading octree..."); |
| 660 |
fflush(stdout); |
| 661 |
} |
| 662 |
if (nprocs > 1) |
| 663 |
ray_pinit(oct, nprocs); |
| 664 |
else |
| 665 |
ray_init(oct); |
| 666 |
} else if (restart < 0) { /* update children */ |
| 667 |
if (!silent) { |
| 668 |
printf("\tRestarting %d processes...", nprocs); |
| 669 |
fflush(stdout); |
| 670 |
} |
| 671 |
ray_pclose(0); |
| 672 |
ray_popen(nprocs); |
| 673 |
} |
| 674 |
if (restart && !silent) |
| 675 |
printf("done\n"); |
| 676 |
/* sample frame buffer */ |
| 677 |
init_frame_sample(); |
| 678 |
/* initialize frame error */ |
| 679 |
comp_frame_error(); |
| 680 |
return; |
| 681 |
{ |
| 682 |
float *ebuf = (float *)malloc(sizeof(float)*hres*vres); |
| 683 |
char fnm[256]; |
| 684 |
register int n; |
| 685 |
for (n = hres*vres; n--; ) |
| 686 |
ebuf[n] = acctab[abuffer[n]]; |
| 687 |
sprintf(fnm, vval(BASENAME), fcur); |
| 688 |
strcat(fnm, "_inerr.pic"); |
| 689 |
write_map(ebuf, fnm); |
| 690 |
free((void *)ebuf); |
| 691 |
} |
| 692 |
} |
| 693 |
|
| 694 |
|
| 695 |
void |
| 696 |
filter_frame() /* interpolation, motion-blur, and exposure */ |
| 697 |
{ |
| 698 |
double expval = expspec_val(getexp(fcur)); |
| 699 |
int x, y; |
| 700 |
int neigh[NPINTERP]; |
| 701 |
int nc; |
| 702 |
COLOR cval; |
| 703 |
double w, wsum; |
| 704 |
register int n; |
| 705 |
|
| 706 |
#if 0 |
| 707 |
/* XXX TEMPORARY!! */ |
| 708 |
conspicuity(); |
| 709 |
write_map(cerrmap, "outcmap.pic"); |
| 710 |
{ |
| 711 |
float *ebuf = (float *)malloc(sizeof(float)*hres*vres); |
| 712 |
for (n = hres*vres; n--; ) |
| 713 |
ebuf[n] = acctab[abuffer[n]]; |
| 714 |
write_map(ebuf, "outerr.pic"); |
| 715 |
free((void *)ebuf); |
| 716 |
} |
| 717 |
#endif |
| 718 |
|
| 719 |
if (!silent) { |
| 720 |
printf("\tFiltering frame\n"); |
| 721 |
fflush(stdout); |
| 722 |
} |
| 723 |
/* normalize samples */ |
| 724 |
for (y = vres; y--; ) |
| 725 |
for (x = hres; x--; ) { |
| 726 |
n = fndx(x, y); |
| 727 |
if (sbuffer[n] <= 1) |
| 728 |
continue; |
| 729 |
w = 1.0/(double)sbuffer[n]; |
| 730 |
scalecolor(cbuffer[n], w); |
| 731 |
} |
| 732 |
/* interpolate samples */ |
| 733 |
for (y = vres; y--; ) |
| 734 |
for (x = hres; x--; ) { |
| 735 |
n = fndx(x, y); |
| 736 |
if (sbuffer[n]) |
| 737 |
continue; |
| 738 |
nc = getclosest(neigh, NPINTERP, x, y); |
| 739 |
setcolor(cbuffer[n], 0., 0., 0.); |
| 740 |
wsum = 0.; |
| 741 |
while (nc-- > 0) { |
| 742 |
copycolor(cval, cbuffer[neigh[nc]]); |
| 743 |
w = sample_wt((neigh[nc]%hres) - x, |
| 744 |
(neigh[nc]/hres) - y); |
| 745 |
scalecolor(cval, w); |
| 746 |
addcolor(cbuffer[n], cval); |
| 747 |
wsum += w; |
| 748 |
} |
| 749 |
if (wsum > FTINY) { |
| 750 |
w = 1.0/wsum; |
| 751 |
scalecolor(cbuffer[n], w); |
| 752 |
} |
| 753 |
} |
| 754 |
/* motion blur if requested */ |
| 755 |
if (mblur > .02) { |
| 756 |
int len; |
| 757 |
int xs, ys, xl, yl; |
| 758 |
int rise, run; |
| 759 |
long rise2, run2; |
| 760 |
int n2; |
| 761 |
int cnt; |
| 762 |
/* sum in motion streaks */ |
| 763 |
memset(outbuffer, '\0', sizeof(COLOR)*hres*vres); |
| 764 |
memset(wbuffer, '\0', sizeof(float)*hres*vres); |
| 765 |
for (y = vres; y--; ) |
| 766 |
for (x = hres; x--; ) { |
| 767 |
n = fndx(x, y); |
| 768 |
if (xmbuffer[n] == MO_UNK) { |
| 769 |
run = rise = 0; |
| 770 |
} else { |
| 771 |
run = (int)(mblur*xmbuffer[n]); |
| 772 |
rise = (int)(mblur*ymbuffer[n]); |
| 773 |
} |
| 774 |
if (!(run | rise)) { |
| 775 |
addcolor(outbuffer[n], cbuffer[n]); |
| 776 |
wbuffer[n] += 1.; |
| 777 |
continue; |
| 778 |
} |
| 779 |
xl = x - run/4; |
| 780 |
yl = y - rise/4; |
| 781 |
if (run < 0) { xs = -1; run = -run; } |
| 782 |
else xs = 1; |
| 783 |
if (rise < 0) { ys = -1; rise = -rise; } |
| 784 |
else ys = 1; |
| 785 |
rise2 = run2 = 0L; |
| 786 |
if (rise > run) { |
| 787 |
cnt = rise + 1; |
| 788 |
w = 1./cnt; |
| 789 |
copycolor(cval, cbuffer[n]); |
| 790 |
scalecolor(cval, w); |
| 791 |
while (cnt) |
| 792 |
if (rise2 >= run2) { |
| 793 |
if ((xl >= 0 & xl < hres & |
| 794 |
yl >= 0 & yl < vres)) { |
| 795 |
n2 = fndx(xl, yl); |
| 796 |
addcolor(outbuffer[n2], |
| 797 |
cval); |
| 798 |
wbuffer[n2] += w; |
| 799 |
} |
| 800 |
yl += ys; |
| 801 |
run2 += run; |
| 802 |
cnt--; |
| 803 |
} else { |
| 804 |
xl += xs; |
| 805 |
rise2 += rise; |
| 806 |
} |
| 807 |
} else { |
| 808 |
cnt = run + 1; |
| 809 |
w = 1./cnt; |
| 810 |
copycolor(cval, cbuffer[n]); |
| 811 |
scalecolor(cval, w); |
| 812 |
while (cnt) |
| 813 |
if (run2 >= rise2) { |
| 814 |
if ((xl >= 0 & xl < hres & |
| 815 |
yl >= 0 & yl < vres)) { |
| 816 |
n2 = fndx(xl, yl); |
| 817 |
addcolor(outbuffer[n2], |
| 818 |
cval); |
| 819 |
wbuffer[n2] += w; |
| 820 |
} |
| 821 |
xl += xs; |
| 822 |
rise2 += rise; |
| 823 |
cnt--; |
| 824 |
} else { |
| 825 |
yl += ys; |
| 826 |
run2 += run; |
| 827 |
} |
| 828 |
} |
| 829 |
} |
| 830 |
/* compute final results */ |
| 831 |
for (y = vres; y--; ) |
| 832 |
for (x = hres; x--; ) { |
| 833 |
n = fndx(x, y); |
| 834 |
if (wbuffer[n] <= FTINY) |
| 835 |
continue; |
| 836 |
w = 1./wbuffer[n]; |
| 837 |
scalecolor(outbuffer[n], w); |
| 838 |
} |
| 839 |
} else |
| 840 |
for (n = hres*vres; n--; ) |
| 841 |
copycolor(outbuffer[n], cbuffer[n]); |
| 842 |
/* |
| 843 |
for (n = hres*vres; n--; ) |
| 844 |
if (!sbuffer[n]) |
| 845 |
setcolor(outbuffer[n], 0., 0., 0.); |
| 846 |
*/ |
| 847 |
/* adjust exposure */ |
| 848 |
if ((expval < 0.99 | expval > 1.01)) |
| 849 |
for (n = hres*vres; n--; ) |
| 850 |
scalecolor(outbuffer[n], expval); |
| 851 |
return; |
| 852 |
{ |
| 853 |
float *sbuf = (float *)malloc(sizeof(float)*hres*vres); |
| 854 |
char fnm[256]; |
| 855 |
sprintf(fnm, vval(BASENAME), fcur); |
| 856 |
strcat(fnm, "_outsamp.pic"); |
| 857 |
for (n = hres*vres; n--; ) |
| 858 |
sbuf[n] = (float)sbuffer[n]; |
| 859 |
write_map(sbuf, fnm); |
| 860 |
free((void *)sbuf); |
| 861 |
} |
| 862 |
} |
| 863 |
|
| 864 |
|
| 865 |
void |
| 866 |
send_frame() /* send frame to destination */ |
| 867 |
{ |
| 868 |
char pfname[1024]; |
| 869 |
double d; |
| 870 |
FILE *fp; |
| 871 |
int y; |
| 872 |
/* open output picture */ |
| 873 |
sprintf(pfname, vval(BASENAME), fcur); |
| 874 |
strcat(pfname, ".pic"); |
| 875 |
fp = fopen(pfname, "w"); |
| 876 |
if (fp == NULL) { |
| 877 |
sprintf(errmsg, "cannot open output frame \"%s\"", pfname); |
| 878 |
error(SYSTEM, errmsg); |
| 879 |
} |
| 880 |
SET_FILE_BINARY(fp); |
| 881 |
if (!silent) { |
| 882 |
printf("\tWriting to \"%s\"\n", pfname); |
| 883 |
fflush(stdout); |
| 884 |
} |
| 885 |
/* write header */ |
| 886 |
newheader("RADIANCE", fp); |
| 887 |
printargs(gargc, gargv, fp); |
| 888 |
fprintf(fp, "SOFTWARE= %s\n", VersionID); |
| 889 |
fprintf(fp, "FRAME=%d\n", fcur); |
| 890 |
fputnow(fp); |
| 891 |
fputs(VIEWSTR, fp); fprintview(&vw, fp); fputc('\n', fp); |
| 892 |
d = expspec_val(getexp(fcur)); |
| 893 |
if ((d < 0.99 | d > 1.01)) |
| 894 |
fputexpos(d, fp); |
| 895 |
d = viewaspect(&vw) * hres / vres; |
| 896 |
if ((d < 0.99 | d > 1.01)) |
| 897 |
fputaspect(d, fp); |
| 898 |
fputformat(COLRFMT, fp); |
| 899 |
fputc('\n', fp); /* end header */ |
| 900 |
fprtresolu(hres, vres, fp); |
| 901 |
if (fflush(fp) == EOF) |
| 902 |
goto writerr; |
| 903 |
#if (PIXSTANDARD != (YMAJOR|YDECR)) |
| 904 |
error(CONSISTENCY, "bad code in send_frame"); |
| 905 |
#endif |
| 906 |
for (y = vres; y--; ) /* write scanlines */ |
| 907 |
if (fwritescan(outbuffer+y*hres, hres, fp) < 0) |
| 908 |
goto writerr; |
| 909 |
if (fclose(fp) == EOF) |
| 910 |
goto writerr; |
| 911 |
return; /* all is well */ |
| 912 |
writerr: |
| 913 |
sprintf(errmsg, "error writing frame \"%s\"", pfname); |
| 914 |
error(SYSTEM, errmsg); |
| 915 |
} |
| 916 |
|
| 917 |
|
| 918 |
void |
| 919 |
free_frame() /* free frame allocation */ |
| 920 |
{ |
| 921 |
if (cbuffer == NULL) |
| 922 |
return; |
| 923 |
free((void *)cbuffer); cbuffer = NULL; |
| 924 |
free((void *)zbuffer); zbuffer = NULL; |
| 925 |
free((void *)obuffer); obuffer = NULL; |
| 926 |
free((void *)xmbuffer); xmbuffer = NULL; |
| 927 |
free((void *)ymbuffer); ymbuffer = NULL; |
| 928 |
free((void *)cprev); cprev = NULL; |
| 929 |
free((void *)zprev); zprev = NULL; |
| 930 |
free((void *)oprev); oprev = NULL; |
| 931 |
cerrmap = NULL; |
| 932 |
val2map = NULL; |
| 933 |
hres = vres = 0; |
| 934 |
vw.type = vwprev.type = 0; |
| 935 |
frm_stop = 0; |
| 936 |
} |
