1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: ranimove1.c,v 3.10 2005/04/19 01:15:07 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* ranimove1.c |
6 |
* |
7 |
* Basic frame rendering routines for ranimove(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 "source.h" |
20 |
#include "random.h" |
21 |
|
22 |
double acctab[256]; /* accuracy value table */ |
23 |
|
24 |
int hres, vres; /* frame resolution (fcur) */ |
25 |
double pixaspect; /* pixel aspect ratio */ |
26 |
|
27 |
VIEW vw; /* view for this frame */ |
28 |
COLOR *cbuffer; /* color at each pixel */ |
29 |
float *zbuffer; /* depth at each pixel */ |
30 |
OBJECT *obuffer; /* object id at each pixel */ |
31 |
short *xmbuffer; /* x motion at each pixel */ |
32 |
short *ymbuffer; /* y motion at each pixel */ |
33 |
BYTE *abuffer; /* accuracy at each pixel */ |
34 |
BYTE *sbuffer; /* sample count per pixel */ |
35 |
|
36 |
VIEW vwprev; /* last frame's view */ |
37 |
COLOR *cprev; /* last frame colors */ |
38 |
float *zprev; /* last frame depth */ |
39 |
OBJECT *oprev; /* last frame objects */ |
40 |
BYTE *aprev; /* last frame accuracy */ |
41 |
|
42 |
float *cerrmap; /* conspicuous error map */ |
43 |
COLOR *val2map; /* value-squared map for variance */ |
44 |
|
45 |
double frm_stop; /* when to stop rendering this frame */ |
46 |
|
47 |
double hlsmax; /* maximum high-level saliency this frame */ |
48 |
|
49 |
|
50 |
static void next_frame(void); |
51 |
static int sample_here(int x, int y); |
52 |
static int offset_cmp(const void *p1, const void *p2); |
53 |
static void setmotion(int n, FVECT wpos); |
54 |
static void init_frame_sample(void); |
55 |
|
56 |
|
57 |
extern void |
58 |
write_map( /* write out float map (debugging) */ |
59 |
float *mp, |
60 |
char *fn |
61 |
) |
62 |
{ |
63 |
FILE *fp = fopen(fn, "w"); |
64 |
COLOR scanbuf[2048]; |
65 |
int x, y; |
66 |
|
67 |
if (fp == NULL) |
68 |
return; |
69 |
newheader("RADIANCE", fp); |
70 |
fputformat(COLRFMT, fp); |
71 |
fputc('\n', fp); /* end header */ |
72 |
fprtresolu(hres, vres, fp); |
73 |
for (y = vres; y--; ) { /* write scanlines */ |
74 |
float *bp = mp + (y+1)*hres - 1; |
75 |
for (x = hres; x--; bp--) |
76 |
setcolor(scanbuf[x], *bp, *bp, *bp); |
77 |
if (fwritescan(scanbuf, hres, fp) < 0) |
78 |
break; |
79 |
} |
80 |
fclose(fp); |
81 |
} |
82 |
|
83 |
|
84 |
static void |
85 |
next_frame(void) /* prepare next frame buffer */ |
86 |
{ |
87 |
VIEW *fv; |
88 |
char *err; |
89 |
/* get previous view */ |
90 |
if (vw.type != 0) |
91 |
vwprev = vw; |
92 |
else if (fcur > 1 && (fv = getview(fcur-1)) != NULL) { |
93 |
vwprev = *fv; |
94 |
if (setview(&vwprev) != NULL) |
95 |
vwprev.type = 0; |
96 |
} |
97 |
/* get current view */ |
98 |
if ((fv = getview(fcur)) == NULL) { |
99 |
sprintf(errmsg, "cannot get view for frame %d", fcur); |
100 |
error(USER, errmsg); |
101 |
} |
102 |
vw = *fv; |
103 |
if ((err = setview(&vw)) != NULL) { |
104 |
sprintf(errmsg, "view error at frame %d: %s", fcur, err); |
105 |
error(USER, errmsg); |
106 |
} |
107 |
if (cbuffer == NULL) { |
108 |
/* compute resolution and allocate */ |
109 |
switch (sscanf(vval(RESOLUTION), "%d %d %lf", |
110 |
&hres, &vres, &pixaspect)) { |
111 |
case 1: |
112 |
vres = hres; |
113 |
/* fall through */ |
114 |
case 2: |
115 |
pixaspect = 1.; |
116 |
/* fall through */ |
117 |
case 3: |
118 |
if ((hres > 0) & (vres > 0)) |
119 |
break; |
120 |
/* fall through */ |
121 |
default: |
122 |
sprintf(errmsg, "bad %s value", vnam(RESOLUTION)); |
123 |
error(USER, errmsg); |
124 |
} |
125 |
normaspect(viewaspect(&vw), &pixaspect, &hres, &vres); |
126 |
cbuffer = (COLOR *)malloc(sizeof(COLOR)*hres*vres); |
127 |
zbuffer = (float *)malloc(sizeof(float)*hres*vres); |
128 |
obuffer = (OBJECT *)malloc(sizeof(OBJECT)*hres*vres); |
129 |
xmbuffer = (short *)malloc(sizeof(short)*hres*vres); |
130 |
ymbuffer = (short *)malloc(sizeof(short)*hres*vres); |
131 |
abuffer = (BYTE *)calloc(hres*vres, sizeof(BYTE)); |
132 |
sbuffer = (BYTE *)calloc(hres*vres, sizeof(BYTE)); |
133 |
cprev = (COLOR *)malloc(sizeof(COLOR)*hres*vres); |
134 |
zprev = (float *)malloc(sizeof(float)*hres*vres); |
135 |
oprev = (OBJECT *)malloc(sizeof(OBJECT)*hres*vres); |
136 |
aprev = (BYTE *)malloc(sizeof(BYTE)*hres*vres); |
137 |
if ((cbuffer==NULL) | (zbuffer==NULL) | (obuffer==NULL) | |
138 |
(xmbuffer==NULL) | (ymbuffer==NULL) | |
139 |
(abuffer==NULL) | (sbuffer==NULL) | |
140 |
(cprev==NULL) | (zprev == NULL) | |
141 |
(oprev==NULL) | (aprev==NULL)) |
142 |
error(SYSTEM, "out of memory in init_frame"); |
143 |
frm_stop = getTime() + rtperfrm; |
144 |
} else { |
145 |
COLOR *cp; /* else just swap buffers */ |
146 |
float *fp; |
147 |
OBJECT *op; |
148 |
BYTE *bp; |
149 |
cp = cprev; cprev = cbuffer; cbuffer = cp; |
150 |
fp = zprev; zprev = zbuffer; zbuffer = fp; |
151 |
op = oprev; oprev = obuffer; obuffer = op; |
152 |
bp = aprev; aprev = abuffer; abuffer = bp; |
153 |
memset(abuffer, '\0', sizeof(BYTE)*hres*vres); |
154 |
memset(sbuffer, '\0', sizeof(BYTE)*hres*vres); |
155 |
frm_stop += rtperfrm; |
156 |
} |
157 |
cerrmap = NULL; |
158 |
val2map = NULL; |
159 |
} |
160 |
|
161 |
|
162 |
#define SAMPDIST 3 /* Maximum distance to neighbor sample */ |
163 |
#define SAMPDIST2 (SAMPDIST*SAMPDIST) |
164 |
|
165 |
|
166 |
static int |
167 |
sample_here( /* 4x4 quincunx sample at this pixel? */ |
168 |
register int x, |
169 |
register int y |
170 |
) |
171 |
{ |
172 |
if (y & 0x1) /* every other row has samples */ |
173 |
return(0); |
174 |
if (y & 0x3) /* every fourth row is offset */ |
175 |
x += 2; |
176 |
return((x & 0x3) == 0); /* every fourth column is sampled */ |
177 |
} |
178 |
|
179 |
|
180 |
extern void |
181 |
sample_pos( /* compute jittered sample position */ |
182 |
double hv[2], |
183 |
int x, |
184 |
int y, |
185 |
int sn |
186 |
) |
187 |
{ |
188 |
int hl[2]; |
189 |
|
190 |
hl[0] = x; hl[1] = y; |
191 |
multisamp(hv, 2, urand(ilhash(hl,2) + sn)); |
192 |
hv[0] = ((double)x + hv[0]) / (double)hres; |
193 |
hv[1] = ((double)y + hv[1]) / (double)vres; |
194 |
} |
195 |
|
196 |
|
197 |
extern double |
198 |
sample_wt( /* compute interpolant sample weight */ |
199 |
int xo, |
200 |
int yo |
201 |
) |
202 |
{ |
203 |
static double etab[400]; |
204 |
/* we can't use the name rad2 here, for some reason Visual C |
205 |
thinks that is a constant (compiler bug?) */ |
206 |
int rad_2 = xo*xo + yo*yo; |
207 |
int i; |
208 |
|
209 |
if (etab[0] <= FTINY) /* initialize exponent table */ |
210 |
for (i = 400; i--; ) |
211 |
etab[i] = exp(-0.1*i); |
212 |
|
213 |
/* look up Gaussian */ |
214 |
i = (int)((10.*3./(double)SAMPDIST2)*rad_2 + .5); |
215 |
if (i >= 400) |
216 |
return(0.0); |
217 |
return(etab[i]); |
218 |
} |
219 |
|
220 |
|
221 |
static int |
222 |
offset_cmp( /* compare offset distances */ |
223 |
const void *p1, |
224 |
const void *p2 |
225 |
) |
226 |
{ |
227 |
return(*(const int *)p1 - *(const int *)p2); |
228 |
} |
229 |
|
230 |
|
231 |
extern int |
232 |
getclosest( /* get nc closest neighbors on same object */ |
233 |
int *iarr, |
234 |
int nc, |
235 |
int x, |
236 |
int y |
237 |
) |
238 |
{ |
239 |
#define NSCHECK ((2*SAMPDIST+1)*(2*SAMPDIST+1)) |
240 |
static int hro, vro; |
241 |
static int ioffs[NSCHECK]; |
242 |
OBJECT myobj; |
243 |
int i0, nf; |
244 |
register int i, j; |
245 |
/* get our object number */ |
246 |
myobj = obuffer[fndx(x, y)]; |
247 |
/* special case for borders */ |
248 |
if ((x < SAMPDIST) | (x >= hres-SAMPDIST) | |
249 |
(y < SAMPDIST) | (y >= vres-SAMPDIST)) { |
250 |
int tndx[NSCHECK][2]; |
251 |
nf = 0; |
252 |
for (j = y - SAMPDIST; j <= y + SAMPDIST; j++) { |
253 |
if (j >= vres) break; |
254 |
if (j < 0) j = 0; |
255 |
for (i = x - SAMPDIST; i <= x + SAMPDIST; i++) { |
256 |
if (i >= hres) break; |
257 |
if (i < 0) i = 0; |
258 |
i0 = fndx(i, j); |
259 |
if (!sbuffer[i0]) |
260 |
continue; |
261 |
if ((myobj != OVOID) & (obuffer[i0] != myobj)) |
262 |
continue; |
263 |
tndx[nf][0] = (i-x)*(i-x) + (j-y)*(j-y); |
264 |
tndx[nf][1] = i0; |
265 |
nf++; |
266 |
} |
267 |
} |
268 |
qsort((void *)tndx, nf, 2*sizeof(int), offset_cmp); |
269 |
if (nf > nc) |
270 |
nf = nc; |
271 |
for (i = nf; i--; ) |
272 |
iarr[i] = tndx[i][1]; |
273 |
return(nf); |
274 |
} |
275 |
/* initialize offset array */ |
276 |
if ((hres != hro) | (vres != vro)) { |
277 |
int toffs[NSCHECK][2]; |
278 |
i0 = fndx(SAMPDIST, SAMPDIST); |
279 |
nf = 0; |
280 |
for (i = 0; i <= 2*SAMPDIST; i++) |
281 |
for (j = 0; j <= 2*SAMPDIST; j++) { |
282 |
toffs[nf][0] = (i-SAMPDIST)*(i-SAMPDIST) + |
283 |
(j-SAMPDIST)*(j-SAMPDIST); |
284 |
toffs[nf][1] = fndx(i, j) - i0; |
285 |
nf++; |
286 |
} |
287 |
qsort((void *)toffs, nf, 2*sizeof(int), offset_cmp); |
288 |
for (i = NSCHECK; i--; ) |
289 |
ioffs[i] = toffs[i][1]; |
290 |
hro = hres; |
291 |
vro = vres; |
292 |
} |
293 |
/* find up to nc neighbors */ |
294 |
i0 = fndx(x, y); |
295 |
for (j = 0, nf = 0; (j < NSCHECK) & (nf < nc); j++) { |
296 |
i = i0 + ioffs[j]; |
297 |
if (sbuffer[i] && (myobj == OVOID) | (obuffer[i] == myobj)) |
298 |
iarr[nf++] = i; |
299 |
} |
300 |
/* return number found */ |
301 |
return(nf); |
302 |
#undef NSCHECK |
303 |
} |
304 |
|
305 |
|
306 |
static void |
307 |
setmotion( /* compute motion vector for this pixel */ |
308 |
register int n, |
309 |
FVECT wpos |
310 |
) |
311 |
{ |
312 |
FVECT ovp; |
313 |
int moi; |
314 |
int xp, yp; |
315 |
/* ID object and update maximum HLS */ |
316 |
moi = getmove(obuffer[n]); |
317 |
if (moi >= 0 && obj_move[moi].cprio > hlsmax) |
318 |
hlsmax = obj_move[moi].cprio; |
319 |
if (vwprev.type == 0) /* return leaves MO_UNK */ |
320 |
return; |
321 |
if (moi >= 0) { /* move object point back */ |
322 |
multp3(ovp, wpos, obj_move[moi].bxfm); |
323 |
wpos = ovp; |
324 |
} |
325 |
viewloc(ovp, &vwprev, wpos); |
326 |
if (ovp[2] <= FTINY) |
327 |
return; |
328 |
xp = (int)(ovp[0]*hres); |
329 |
yp = (int)(ovp[1]*vres); |
330 |
xmbuffer[n] = xp - (n % hres); |
331 |
ymbuffer[n] = yp - (n / hres); |
332 |
if ((xp < 0) | (xp >= hres)) |
333 |
return; |
334 |
if ((yp < 0) | (yp >= vres)) |
335 |
return; |
336 |
n = fndx(xp, yp); |
337 |
if ((zprev[n] < 0.97*ovp[2]) | (zprev[n] > 1.03*ovp[2])) |
338 |
oprev[n] = OVOID; /* assume it's a bad match */ |
339 |
} |
340 |
|
341 |
|
342 |
static void |
343 |
init_frame_sample(void) /* sample our initial frame */ |
344 |
{ |
345 |
RAY ir; |
346 |
int x, y; |
347 |
register int n; |
348 |
|
349 |
if (!silent) { |
350 |
printf("\tComputing initial samples..."); |
351 |
fflush(stdout); |
352 |
} |
353 |
hlsmax = CSF_SMN; |
354 |
for (y = vres; y--; ) |
355 |
for (x = hres; x--; ) { |
356 |
double hv[2]; |
357 |
n = fndx(x, y); |
358 |
xmbuffer[n] = MO_UNK; |
359 |
ymbuffer[n] = MO_UNK; |
360 |
sample_pos(hv, x, y, 0); |
361 |
ir.rmax = viewray(ir.rorg, ir.rdir, &vw, hv[0], hv[1]); |
362 |
if (ir.rmax < -FTINY) { |
363 |
setcolor(cbuffer[n], 0., 0., 0.); |
364 |
zbuffer[n] = FHUGE; |
365 |
obuffer[n] = OVOID; |
366 |
abuffer[n] = ADISTANT; |
367 |
continue; |
368 |
} |
369 |
if (!sample_here(x, y)) { /* just cast */ |
370 |
rayorigin(&ir, PRIMARY, NULL, NULL); |
371 |
if (!localhit(&ir, &thescene)) { |
372 |
if (ir.ro != &Aftplane) |
373 |
sourcehit(&ir); |
374 |
copycolor(cbuffer[n], ir.rcol); |
375 |
zbuffer[n] = ir.rot; |
376 |
obuffer[n] = ir.robj; |
377 |
abuffer[n] = ADISTANT; |
378 |
sbuffer[n] = 1; |
379 |
} else { |
380 |
zbuffer[n] = ir.rot; |
381 |
obuffer[n] = ir.robj; |
382 |
setmotion(n, ir.rop); |
383 |
} |
384 |
continue; |
385 |
} |
386 |
if (nprocs > 1) { /* get sample */ |
387 |
int rval; |
388 |
rayorigin(&ir, PRIMARY, NULL, NULL); |
389 |
ir.rno = n; |
390 |
rval = ray_pqueue(&ir); |
391 |
if (!rval) |
392 |
continue; |
393 |
if (rval < 0) |
394 |
quit(1); |
395 |
n = ir.rno; |
396 |
} else |
397 |
ray_trace(&ir); |
398 |
copycolor(cbuffer[n], ir.rcol); |
399 |
zbuffer[n] = ir.rot; |
400 |
obuffer[n] = ir.robj; |
401 |
sbuffer[n] = 1; |
402 |
if (ir.rot >= FHUGE) |
403 |
abuffer[n] = ADISTANT; |
404 |
else { |
405 |
abuffer[n] = ALOWQ; |
406 |
setmotion(n, ir.rop); |
407 |
} |
408 |
} |
409 |
if (nprocs > 1) /* get stragglers */ |
410 |
while (ray_presult(&ir, 0)) { |
411 |
n = ir.rno; |
412 |
copycolor(cbuffer[n], ir.rcol); |
413 |
zbuffer[n] = ir.rot; |
414 |
obuffer[n] = ir.robj; |
415 |
sbuffer[n] = 1; |
416 |
if (ir.rot >= FHUGE) |
417 |
abuffer[n] = ADISTANT; |
418 |
else { |
419 |
abuffer[n] = ALOWQ; |
420 |
setmotion(n, ir.rop); |
421 |
} |
422 |
} |
423 |
/* ambiguate object boundaries */ |
424 |
for (y = vres-1; y--; ) |
425 |
for (x = hres-1; x--; ) { |
426 |
OBJECT obj; |
427 |
n = fndx(x, y); |
428 |
if ((obj = obuffer[n]) == OVOID) |
429 |
continue; |
430 |
if ((obuffer[n+1] != OVOID) & (obuffer[n+1] != obj)) { |
431 |
obuffer[n] = OVOID; |
432 |
obuffer[n+1] = OVOID; |
433 |
} |
434 |
if ((obuffer[n+hres] != OVOID) & (obuffer[n+hres] != obj)) { |
435 |
obuffer[n] = OVOID; |
436 |
obuffer[n+hres] = OVOID; |
437 |
} |
438 |
} |
439 |
|
440 |
if (!silent) |
441 |
printf("done\n"); |
442 |
} |
443 |
|
444 |
|
445 |
extern int |
446 |
getambcolor( /* get ambient color for object if we can */ |
447 |
COLOR clr, |
448 |
int obj |
449 |
) |
450 |
{ |
451 |
register OBJREC *op; |
452 |
|
453 |
if (obj == OVOID) |
454 |
return(0); |
455 |
op = objptr(obj); |
456 |
if ((op->otype == OBJ_INSTANCE) & (op->omod == OVOID)) |
457 |
return(0); |
458 |
/* search for material */ |
459 |
do { |
460 |
if (op->omod == OVOID || ofun[op->otype].flags & T_X) |
461 |
return(0); |
462 |
op = objptr(op->omod); |
463 |
} while (!ismaterial(op->otype)); |
464 |
/* |
465 |
* Since this routine is called to compute the difference |
466 |
* from rendering with and without interreflections, |
467 |
* we don't want to return colors for materials that are |
468 |
* explicitly excluded from the HQ ambient calculation. |
469 |
*/ |
470 |
if (hirendparams.ambincl >= 0) { |
471 |
int i; |
472 |
char *lv; |
473 |
for (i = 0; (lv = rpambmod(&hirendparams,i)) != NULL; i++) |
474 |
if (lv[0] == op->oname[0] && |
475 |
!strcmp(lv+1, op->oname+1)) |
476 |
break; |
477 |
if ((lv != NULL) != hirendparams.ambincl) |
478 |
return(0); |
479 |
} |
480 |
switch (op->otype) { |
481 |
case MAT_PLASTIC: |
482 |
case MAT_METAL: |
483 |
case MAT_PLASTIC2: |
484 |
case MAT_METAL2: |
485 |
case MAT_PFUNC: |
486 |
case MAT_MFUNC: |
487 |
case MAT_PDATA: |
488 |
case MAT_MDATA: |
489 |
case MAT_TRANS: |
490 |
case MAT_TRANS2: |
491 |
case MAT_TFUNC: |
492 |
case MAT_TDATA: |
493 |
if (op->oargs.nfargs < 3) |
494 |
return(0); |
495 |
setcolor(clr, op->oargs.farg[0], op->oargs.farg[1], |
496 |
op->oargs.farg[2]); |
497 |
return(1); |
498 |
case MAT_BRTDF: |
499 |
if (op->oargs.nfargs < 6) |
500 |
return(0); |
501 |
setcolor(clr, op->oargs.farg[0]+op->oargs.farg[3], |
502 |
op->oargs.farg[1]+op->oargs.farg[4], |
503 |
op->oargs.farg[2]+op->oargs.farg[5]); |
504 |
scalecolor(clr, 0.5); |
505 |
return(1); |
506 |
case MAT_LIGHT: |
507 |
case MAT_GLOW: |
508 |
case MAT_ILLUM: |
509 |
setcolor(clr, 0., 0., 0.); |
510 |
return(1); |
511 |
} |
512 |
return(0); |
513 |
} |
514 |
|
515 |
|
516 |
extern double |
517 |
estimaterr( /* estimate relative error from samples */ |
518 |
COLOR cs, |
519 |
COLOR cs2, |
520 |
int ns, |
521 |
int ns0 |
522 |
) |
523 |
{ |
524 |
double d, d2, brt; |
525 |
|
526 |
if (ns <= 1 || (brt = bright(cs)/ns) < 1e-14) |
527 |
return(1.0); |
528 |
/* use largest of RGB std. dev. */ |
529 |
d2 = colval(cs2,RED) - colval(cs,RED)*colval(cs,RED)/ns; |
530 |
d = colval(cs2,GRN) - colval(cs,GRN)*colval(cs,GRN)/ns; |
531 |
if (d > d2) d2 = d; |
532 |
d = colval(cs2,BLU) - colval(cs,BLU)*colval(cs,BLU)/ns; |
533 |
if (d > d2) d2 = d; |
534 |
/* use s.d. if <= 1 central sample */ |
535 |
if (ns0 <= 1) |
536 |
return(sqrt(d2/(ns-1))/brt); |
537 |
/* use s.d./sqrt(ns0) otherwise */ |
538 |
return(sqrt(d2/((ns-1)*ns0))/brt); |
539 |
} |
540 |
|
541 |
|
542 |
extern double |
543 |
comperr( /* estimate relative error in neighborhood */ |
544 |
int *neigh, |
545 |
int nc, |
546 |
int ns0 |
547 |
) |
548 |
{ |
549 |
COLOR csum, csum2; |
550 |
COLOR ctmp; |
551 |
int i; |
552 |
int ns; |
553 |
register int n; |
554 |
/* add together samples */ |
555 |
setcolor(csum, 0., 0., 0.); |
556 |
setcolor(csum2, 0., 0., 0.); |
557 |
for (i = 0, ns = 0; (i < nc) & (ns < NSAMPOK); i++) { |
558 |
n = neigh[i]; |
559 |
addcolor(csum, cbuffer[n]); |
560 |
if (val2map != NULL) { |
561 |
addcolor(csum2, val2map[n]); |
562 |
ns += sbuffer[n]; |
563 |
continue; |
564 |
} |
565 |
if (sbuffer[n] != 1) |
566 |
error(CONSISTENCY, "bad count in comperr"); |
567 |
setcolor(ctmp, |
568 |
colval(cbuffer[n],RED)*colval(cbuffer[n],RED), |
569 |
colval(cbuffer[n],GRN)*colval(cbuffer[n],GRN), |
570 |
colval(cbuffer[n],BLU)*colval(cbuffer[n],BLU)); |
571 |
addcolor(csum2, ctmp); |
572 |
ns++; |
573 |
} |
574 |
return(estimaterr(csum, csum2, ns, ns0)); |
575 |
} |
576 |
|
577 |
|
578 |
extern void |
579 |
comp_frame_error(void) /* initialize frame error values */ |
580 |
{ |
581 |
BYTE *edone = NULL; |
582 |
COLOR objamb; |
583 |
double eest; |
584 |
int neigh[NSAMPOK]; |
585 |
int nc; |
586 |
int x, y, i; |
587 |
register int n; |
588 |
|
589 |
if (!silent) { |
590 |
printf("\tComputing error map\n"); |
591 |
fflush(stdout); |
592 |
} |
593 |
if (acctab[0] <= FTINY) /* initialize accuracy table */ |
594 |
for (i = 256; i--; ) |
595 |
acctab[i] = errorf(i); |
596 |
/* estimate sample error */ |
597 |
if (!curparams->ambounce && hirendparams.ambounce) { |
598 |
/* |
599 |
* Our error estimate for the initial value is based |
600 |
* on the assumption that most of it comes from the |
601 |
* lack of an interreflection calculation. The relative |
602 |
* error should be less than the ambient value divided |
603 |
* by the returned ray value -- we take half of this. |
604 |
*/ |
605 |
edone = (BYTE *)calloc(hres*vres, sizeof(BYTE)); |
606 |
for (y = vres; y--; ) |
607 |
for (x = hres; x--; ) { |
608 |
n = fndx(x, y); |
609 |
if ((abuffer[n] != ALOWQ) | (obuffer[n] == OVOID)) |
610 |
continue; |
611 |
if (!getambcolor(objamb, obuffer[n])) |
612 |
continue; |
613 |
multcolor(objamb, ambval); |
614 |
if ((eest = bright(cbuffer[n])) <= FTINY) |
615 |
continue; |
616 |
eest = bright(objamb) / eest; |
617 |
if (eest > 1.) /* should we report this? */ |
618 |
continue; |
619 |
eest *= 0.50; /* use 50% ambient error */ |
620 |
i = errori(eest); |
621 |
if (i < AMIN) i = AMIN; |
622 |
else if (i >= ADISTANT/2) i = ADISTANT/2-1; |
623 |
abuffer[n] = i; |
624 |
edone[n] = 1; |
625 |
} |
626 |
} |
627 |
/* final statistical estimate */ |
628 |
for (y = vres; y--; ) |
629 |
for (x = hres; x--; ) { |
630 |
n = fndx(x, y); |
631 |
if (abuffer[n] == ADISTANT) |
632 |
continue; /* don't update these */ |
633 |
if (edone != NULL && edone[n]) |
634 |
continue; /* already done this */ |
635 |
if (sbuffer[n] >= 255) { |
636 |
abuffer[n] = ADISTANT; |
637 |
continue; /* can't take any more */ |
638 |
} |
639 |
nc = getclosest(neigh, NSAMPOK, x, y); |
640 |
if (nc <= 0) { |
641 |
abuffer[n] = ANOVAL; |
642 |
continue; /* no clue what to do for him */ |
643 |
} |
644 |
i = errori(comperr(neigh, nc, sbuffer[n])); |
645 |
if (i < AMIN) i = AMIN; |
646 |
else if (i >= ADISTANT) i = ADISTANT-1; |
647 |
abuffer[n] = i; |
648 |
/* can't be better than closest */ |
649 |
if (i < abuffer[neigh[0]] && abuffer[neigh[0]] >= AMIN) |
650 |
abuffer[n] = abuffer[neigh[0]]; |
651 |
} |
652 |
if (edone != NULL) |
653 |
free((void *)edone); |
654 |
} |
655 |
|
656 |
|
657 |
extern void |
658 |
init_frame(void) /* render base (low quality) frame */ |
659 |
{ |
660 |
int restart; |
661 |
|
662 |
/* allocate/swap buffers */ |
663 |
next_frame(); |
664 |
/* check rendering status */ |
665 |
restart = (!nobjects || vdef(MOVE)); |
666 |
if (!restart && curparams != &lorendparams && nprocs > 1) |
667 |
restart = -1; |
668 |
if (restart > 0) { |
669 |
if (nprocs > 1) |
670 |
ray_pdone(1); |
671 |
else |
672 |
ray_done(1); |
673 |
} |
674 |
/* post low quality parameters */ |
675 |
if (curparams != &lorendparams) |
676 |
ray_restore(curparams = &lorendparams); |
677 |
if (restart > 0) { /* load new octree */ |
678 |
char *oct = getoctspec(fcur); |
679 |
if (oct == NULL) { |
680 |
sprintf(errmsg, "cannot get scene for frame %d", fcur); |
681 |
error(USER, errmsg); |
682 |
} |
683 |
if (!silent) { |
684 |
printf("\tLoading octree..."); |
685 |
fflush(stdout); |
686 |
} |
687 |
if (nprocs > 1) |
688 |
ray_pinit(oct, nprocs); |
689 |
else |
690 |
ray_init(oct); |
691 |
} else if (restart < 0) { /* update children */ |
692 |
if (!silent) { |
693 |
printf("\tRestarting %d processes...", nprocs); |
694 |
fflush(stdout); |
695 |
} |
696 |
ray_pclose(0); |
697 |
ray_popen(nprocs); |
698 |
} |
699 |
if (restart && !silent) |
700 |
printf("done\n"); |
701 |
/* sample frame buffer */ |
702 |
init_frame_sample(); |
703 |
/* initialize frame error */ |
704 |
comp_frame_error(); |
705 |
return; |
706 |
{ |
707 |
float *ebuf = (float *)malloc(sizeof(float)*hres*vres); |
708 |
char fnm[256]; |
709 |
register int n; |
710 |
for (n = hres*vres; n--; ) |
711 |
ebuf[n] = acctab[abuffer[n]]; |
712 |
sprintf(fnm, vval(BASENAME), fcur); |
713 |
strcat(fnm, "_inerr.pic"); |
714 |
write_map(ebuf, fnm); |
715 |
free((void *)ebuf); |
716 |
} |
717 |
} |
718 |
|
719 |
|
720 |
extern void |
721 |
filter_frame(void) /* interpolation, motion-blur, and exposure */ |
722 |
{ |
723 |
double expval = expspec_val(getexp(fcur)); |
724 |
int x, y; |
725 |
int neigh[NPINTERP]; |
726 |
int nc; |
727 |
COLOR cval; |
728 |
double w, wsum; |
729 |
register int n; |
730 |
|
731 |
#if 0 |
732 |
/* XXX TEMPORARY!! */ |
733 |
conspicuity(); |
734 |
write_map(cerrmap, "outcmap.pic"); |
735 |
{ |
736 |
float *ebuf = (float *)malloc(sizeof(float)*hres*vres); |
737 |
for (n = hres*vres; n--; ) |
738 |
ebuf[n] = acctab[abuffer[n]]; |
739 |
write_map(ebuf, "outerr.pic"); |
740 |
free((void *)ebuf); |
741 |
} |
742 |
#endif |
743 |
|
744 |
if (!silent) { |
745 |
printf("\tFiltering frame\n"); |
746 |
fflush(stdout); |
747 |
} |
748 |
/* normalize samples */ |
749 |
for (y = vres; y--; ) |
750 |
for (x = hres; x--; ) { |
751 |
n = fndx(x, y); |
752 |
if (sbuffer[n] <= 1) |
753 |
continue; |
754 |
w = 1.0/(double)sbuffer[n]; |
755 |
scalecolor(cbuffer[n], w); |
756 |
} |
757 |
/* interpolate samples */ |
758 |
for (y = vres; y--; ) |
759 |
for (x = hres; x--; ) { |
760 |
n = fndx(x, y); |
761 |
if (sbuffer[n]) |
762 |
continue; |
763 |
nc = getclosest(neigh, NPINTERP, x, y); |
764 |
setcolor(cbuffer[n], 0., 0., 0.); |
765 |
wsum = 0.; |
766 |
while (nc-- > 0) { |
767 |
copycolor(cval, cbuffer[neigh[nc]]); |
768 |
w = sample_wt((neigh[nc]%hres) - x, |
769 |
(neigh[nc]/hres) - y); |
770 |
scalecolor(cval, w); |
771 |
addcolor(cbuffer[n], cval); |
772 |
wsum += w; |
773 |
} |
774 |
if (wsum > FTINY) { |
775 |
w = 1.0/wsum; |
776 |
scalecolor(cbuffer[n], w); |
777 |
} |
778 |
} |
779 |
/* motion blur if requested */ |
780 |
if (mblur > .02) { |
781 |
int xs, ys, xl, yl; |
782 |
int rise, run; |
783 |
long rise2, run2; |
784 |
int n2; |
785 |
int cnt; |
786 |
/* sum in motion streaks */ |
787 |
memset(outbuffer, '\0', sizeof(COLOR)*hres*vres); |
788 |
memset(wbuffer, '\0', sizeof(float)*hres*vres); |
789 |
for (y = vres; y--; ) |
790 |
for (x = hres; x--; ) { |
791 |
n = fndx(x, y); |
792 |
if (xmbuffer[n] == MO_UNK) { |
793 |
run = rise = 0; |
794 |
} else { |
795 |
run = (int)(mblur*xmbuffer[n]); |
796 |
rise = (int)(mblur*ymbuffer[n]); |
797 |
} |
798 |
if (!(run | rise)) { |
799 |
addcolor(outbuffer[n], cbuffer[n]); |
800 |
wbuffer[n] += 1.; |
801 |
continue; |
802 |
} |
803 |
xl = x - run/4; |
804 |
yl = y - rise/4; |
805 |
if (run < 0) { xs = -1; run = -run; } |
806 |
else xs = 1; |
807 |
if (rise < 0) { ys = -1; rise = -rise; } |
808 |
else ys = 1; |
809 |
rise2 = run2 = 0L; |
810 |
if (rise > run) { |
811 |
cnt = rise + 1; |
812 |
w = 1./cnt; |
813 |
copycolor(cval, cbuffer[n]); |
814 |
scalecolor(cval, w); |
815 |
while (cnt) |
816 |
if (rise2 >= run2) { |
817 |
if ((xl >= 0) & (xl < hres) & |
818 |
(yl >= 0) & (yl < vres)) { |
819 |
n2 = fndx(xl, yl); |
820 |
addcolor(outbuffer[n2], |
821 |
cval); |
822 |
wbuffer[n2] += w; |
823 |
} |
824 |
yl += ys; |
825 |
run2 += run; |
826 |
cnt--; |
827 |
} else { |
828 |
xl += xs; |
829 |
rise2 += rise; |
830 |
} |
831 |
} else { |
832 |
cnt = run + 1; |
833 |
w = 1./cnt; |
834 |
copycolor(cval, cbuffer[n]); |
835 |
scalecolor(cval, w); |
836 |
while (cnt) |
837 |
if (run2 >= rise2) { |
838 |
if ((xl >= 0) & (xl < hres) & |
839 |
(yl >= 0) & (yl < vres)) { |
840 |
n2 = fndx(xl, yl); |
841 |
addcolor(outbuffer[n2], |
842 |
cval); |
843 |
wbuffer[n2] += w; |
844 |
} |
845 |
xl += xs; |
846 |
rise2 += rise; |
847 |
cnt--; |
848 |
} else { |
849 |
yl += ys; |
850 |
run2 += run; |
851 |
} |
852 |
} |
853 |
} |
854 |
/* compute final results */ |
855 |
for (y = vres; y--; ) |
856 |
for (x = hres; x--; ) { |
857 |
n = fndx(x, y); |
858 |
if (wbuffer[n] <= FTINY) |
859 |
continue; |
860 |
w = 1./wbuffer[n]; |
861 |
scalecolor(outbuffer[n], w); |
862 |
} |
863 |
} else |
864 |
for (n = hres*vres; n--; ) |
865 |
copycolor(outbuffer[n], cbuffer[n]); |
866 |
/* |
867 |
for (n = hres*vres; n--; ) |
868 |
if (!sbuffer[n]) |
869 |
setcolor(outbuffer[n], 0., 0., 0.); |
870 |
*/ |
871 |
/* adjust exposure */ |
872 |
if ((expval < 0.99) | (expval > 1.01)) |
873 |
for (n = hres*vres; n--; ) |
874 |
scalecolor(outbuffer[n], expval); |
875 |
#if 0 |
876 |
{ |
877 |
float *sbuf = (float *)malloc(sizeof(float)*hres*vres); |
878 |
char fnm[256]; |
879 |
sprintf(fnm, vval(BASENAME), fcur); |
880 |
strcat(fnm, "_outsamp.pic"); |
881 |
for (n = hres*vres; n--; ) |
882 |
sbuf[n] = (float)sbuffer[n]; |
883 |
write_map(sbuf, fnm); |
884 |
free((void *)sbuf); |
885 |
} |
886 |
#endif |
887 |
} |
888 |
|
889 |
|
890 |
extern void |
891 |
send_frame(void) /* send frame to destination */ |
892 |
{ |
893 |
char pfname[1024]; |
894 |
double d; |
895 |
FILE *fp; |
896 |
int y; |
897 |
/* open output picture */ |
898 |
sprintf(pfname, vval(BASENAME), fcur); |
899 |
strcat(pfname, ".pic"); |
900 |
fp = fopen(pfname, "w"); |
901 |
if (fp == NULL) { |
902 |
sprintf(errmsg, "cannot open output frame \"%s\"", pfname); |
903 |
error(SYSTEM, errmsg); |
904 |
} |
905 |
SET_FILE_BINARY(fp); |
906 |
if (!silent) { |
907 |
printf("\tWriting to \"%s\"\n", pfname); |
908 |
fflush(stdout); |
909 |
} |
910 |
/* write header */ |
911 |
newheader("RADIANCE", fp); |
912 |
printargs(gargc, gargv, fp); |
913 |
fprintf(fp, "SOFTWARE= %s\n", VersionID); |
914 |
fprintf(fp, "FRAME=%d\n", fcur); |
915 |
fputnow(fp); |
916 |
fputs(VIEWSTR, fp); fprintview(&vw, fp); fputc('\n', fp); |
917 |
d = expspec_val(getexp(fcur)); |
918 |
if ((d < 0.99) | (d > 1.01)) |
919 |
fputexpos(d, fp); |
920 |
d = viewaspect(&vw) * hres / vres; |
921 |
if ((d < 0.99) | (d > 1.01)) |
922 |
fputaspect(d, fp); |
923 |
fputformat(COLRFMT, fp); |
924 |
fputc('\n', fp); /* end header */ |
925 |
fprtresolu(hres, vres, fp); |
926 |
if (fflush(fp) == EOF) |
927 |
goto writerr; |
928 |
#if (PIXSTANDARD != (YMAJOR|YDECR)) |
929 |
error(CONSISTENCY, "bad code in send_frame"); |
930 |
#endif |
931 |
for (y = vres; y--; ) /* write scanlines */ |
932 |
if (fwritescan(outbuffer+y*hres, hres, fp) < 0) |
933 |
goto writerr; |
934 |
if (fclose(fp) == EOF) |
935 |
goto writerr; |
936 |
return; /* all is well */ |
937 |
writerr: |
938 |
sprintf(errmsg, "error writing frame \"%s\"", pfname); |
939 |
error(SYSTEM, errmsg); |
940 |
} |
941 |
|
942 |
|
943 |
extern void |
944 |
free_frame(void) /* free frame allocation */ |
945 |
{ |
946 |
if (cbuffer == NULL) |
947 |
return; |
948 |
free((void *)cbuffer); cbuffer = NULL; |
949 |
free((void *)zbuffer); zbuffer = NULL; |
950 |
free((void *)obuffer); obuffer = NULL; |
951 |
free((void *)xmbuffer); xmbuffer = NULL; |
952 |
free((void *)ymbuffer); ymbuffer = NULL; |
953 |
free((void *)cprev); cprev = NULL; |
954 |
free((void *)zprev); zprev = NULL; |
955 |
free((void *)oprev); oprev = NULL; |
956 |
cerrmap = NULL; |
957 |
val2map = NULL; |
958 |
hres = vres = 0; |
959 |
vw.type = vwprev.type = 0; |
960 |
frm_stop = 0; |
961 |
} |