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