18 |
|
|
19 |
|
#include "random.h" |
20 |
|
|
21 |
< |
#define OCTSCALE 0.5 /* ceil((valid rad.)/(cube size)) */ |
21 |
> |
#ifndef OCTSCALE |
22 |
> |
#define OCTSCALE 1.0 /* ceil((valid rad.)/(cube size)) */ |
23 |
> |
#endif |
24 |
|
|
25 |
|
typedef struct ambtree { |
26 |
|
AMBVAL *alist; /* ambient value list */ |
50 |
|
#endif |
51 |
|
#endif |
52 |
|
#ifndef SORT_INTVL |
53 |
< |
#define SORT_INTVL (SORT_THRESH*32) |
53 |
> |
#define SORT_INTVL (SORT_THRESH*256) |
54 |
|
#endif |
55 |
|
#ifndef MAX_SORT_INTVL |
56 |
< |
#define MAX_SORT_INTVL (SORT_INTVL<<8) |
56 |
> |
#define MAX_SORT_INTVL (SORT_INTVL<<4) |
57 |
|
#endif |
58 |
|
|
59 |
+ |
static COLOR avsum = BLKCOLOR; /* computed ambient value sum */ |
60 |
+ |
static unsigned int nambvals = 0; /* total number of indirect values */ |
61 |
+ |
static unsigned int nambshare = 0; /* number of values from file */ |
62 |
|
static unsigned long ambclock = 0; /* ambient access clock */ |
58 |
– |
static unsigned int nambvals = 0; /* number of stored ambient values */ |
63 |
|
static unsigned long lastsort = 0; /* time of last value sort */ |
64 |
|
static long sortintvl = SORT_INTVL; /* time until next sort */ |
65 |
|
|
67 |
|
/* |
68 |
|
* Track access times unless we are sharing ambient values |
69 |
|
* through memory on a multiprocessor, when we want to avoid |
70 |
< |
* claiming our own memory (copy on write). |
70 |
> |
* claiming our own memory (copy on write). Go ahead anyway |
71 |
> |
* if more than two thirds of our values are unshared. |
72 |
|
*/ |
73 |
< |
#define tracktime (shm_boundary == NULL || ambfp == NULL) |
73 |
> |
#define tracktime (shm_boundary == NULL || nambvals > 3*nambshare) |
74 |
|
|
75 |
|
#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
76 |
|
|
94 |
|
maxarad = thescene.cusize / 2.0; |
95 |
|
} else { |
96 |
|
minarad = thescene.cusize / ar; |
97 |
< |
maxarad = 16 * minarad; /* heuristic */ |
97 |
> |
maxarad = 64 * minarad; /* heuristic */ |
98 |
|
if (maxarad > thescene.cusize / 2.0) |
99 |
|
maxarad = thescene.cusize / 2.0; |
100 |
|
} |
108 |
|
setambacc(newa) /* set ambient accuracy */ |
109 |
|
double newa; |
110 |
|
{ |
111 |
< |
static double oldambacc = -1.0; |
111 |
> |
double ambdiff; |
112 |
|
|
113 |
< |
ambacc = newa < 0.0 ? 0.0 : newa; /* may be done already */ |
114 |
< |
if (oldambacc < -FTINY) |
115 |
< |
oldambacc = ambacc; /* do nothing first call */ |
116 |
< |
if (fabs(newa - oldambacc) < 0.01) |
117 |
< |
return; /* insignificant -- don't bother */ |
113 |
< |
if (ambacc <= FTINY) |
114 |
< |
return; /* cannot build new tree */ |
115 |
< |
/* else need to rebuild tree */ |
116 |
< |
sortambvals(1); |
117 |
< |
oldambacc = ambacc; /* remeber setting for next call */ |
113 |
> |
if (newa < 0.0) |
114 |
> |
newa = 0.0; |
115 |
> |
ambdiff = fabs(newa - ambacc); |
116 |
> |
if (ambdiff >= .01 && (ambacc = newa) > FTINY && nambvals > 0) |
117 |
> |
sortambvals(1); /* rebuild tree */ |
118 |
|
} |
119 |
|
|
120 |
|
|
121 |
|
setambient(afile) /* initialize calculation */ |
122 |
|
char *afile; |
123 |
|
{ |
124 |
< |
long headlen; |
124 |
> |
long pos, flen; |
125 |
|
AMBVAL amb; |
126 |
|
/* init ambient limits */ |
127 |
|
setambres(ambres); |
137 |
|
/* open ambient file */ |
138 |
|
if ((ambfp = fopen(afile, "r+")) != NULL) { |
139 |
|
initambfile(0); |
140 |
< |
headlen = ftell(ambfp); |
140 |
> |
pos = ftell(ambfp); |
141 |
|
while (readambval(&amb, ambfp)) |
142 |
|
avinsert(avstore(&amb)); |
143 |
|
/* align */ |
144 |
< |
fseek(ambfp, -((ftell(ambfp)-headlen)%AMBVALSIZ), 1); |
144 |
> |
pos += (long)nambvals*AMBVALSIZ; |
145 |
> |
flen = lseek(fileno(ambfp), 0L, 2); |
146 |
> |
if (flen != pos) { |
147 |
> |
error(WARNING, |
148 |
> |
"ignoring last %ld values in ambient file (corrupted)", |
149 |
> |
(flen - pos)/AMBVALSIZ); |
150 |
> |
fseek(ambfp, pos, 0); |
151 |
> |
ftruncate(fileno(ambfp), pos); |
152 |
> |
} |
153 |
> |
nambshare = nambvals; |
154 |
|
} else if ((ambfp = fopen(afile, "w+")) != NULL) |
155 |
|
initambfile(1); |
156 |
|
else { |
184 |
|
} |
185 |
|
|
186 |
|
|
187 |
< |
ambient(acol, r) /* compute ambient component for ray */ |
187 |
> |
ambient(acol, r, nrm) /* compute ambient component for ray */ |
188 |
|
COLOR acol; |
189 |
|
register RAY *r; |
190 |
+ |
FVECT nrm; |
191 |
|
{ |
192 |
|
static int rdepth = 0; /* ambient recursion */ |
193 |
|
double d; |
206 |
|
rdepth++; |
207 |
|
d = doambient(acol, r, r->rweight, NULL, NULL); |
208 |
|
rdepth--; |
209 |
< |
if (d == 0.0) |
209 |
> |
if (d <= FTINY) |
210 |
|
goto dumbamb; |
211 |
|
return; |
212 |
|
} |
214 |
|
sortambvals(0); |
215 |
|
/* get ambient value */ |
216 |
|
setcolor(acol, 0.0, 0.0, 0.0); |
217 |
< |
d = sumambient(acol, r, rdepth, |
217 |
> |
d = sumambient(acol, r, nrm, rdepth, |
218 |
|
&atrunk, thescene.cuorg, thescene.cusize); |
219 |
< |
if (d > FTINY) |
219 |
> |
if (d > FTINY) { |
220 |
|
scalecolor(acol, 1.0/d); |
221 |
< |
else { |
212 |
< |
d = makeambient(acol, r, rdepth++); |
213 |
< |
rdepth--; |
221 |
> |
return; |
222 |
|
} |
223 |
+ |
rdepth++; /* need to cache new value */ |
224 |
+ |
d = makeambient(acol, r, nrm, rdepth-1); |
225 |
+ |
rdepth--; |
226 |
|
if (d > FTINY) |
227 |
|
return; |
228 |
|
dumbamb: /* return global value */ |
229 |
|
copycolor(acol, ambval); |
230 |
+ |
if (ambvwt <= 0 | nambvals == 0) |
231 |
+ |
return; |
232 |
+ |
scalecolor(acol, (double)ambvwt); |
233 |
+ |
addcolor(acol, avsum); /* average in computations */ |
234 |
+ |
d = 1.0/(ambvwt+nambvals); |
235 |
+ |
scalecolor(acol, d); |
236 |
|
} |
237 |
|
|
238 |
|
|
239 |
|
double |
240 |
< |
sumambient(acol, r, al, at, c0, s) /* get interpolated ambient value */ |
240 |
> |
sumambient(acol, r, rn, al, at, c0, s) /* get interpolated ambient value */ |
241 |
|
COLOR acol; |
242 |
|
register RAY *r; |
243 |
+ |
FVECT rn; |
244 |
|
int al; |
245 |
|
AMBTREE *at; |
246 |
|
FVECT c0; |
252 |
|
int i; |
253 |
|
register int j; |
254 |
|
register AMBVAL *av; |
255 |
< |
/* do this node */ |
255 |
> |
|
256 |
|
wsum = 0.0; |
257 |
+ |
/* do this node */ |
258 |
|
for (av = at->alist; av != NULL; av = av->next) { |
259 |
|
if (tracktime) |
260 |
|
av->latick = ambclock++; |
268 |
|
/* |
269 |
|
* Ambient radius test. |
270 |
|
*/ |
271 |
< |
e1 = 0.0; |
272 |
< |
for (j = 0; j < 3; j++) { |
273 |
< |
d = av->pos[j] - r->rop[j]; |
274 |
< |
e1 += d * d; |
275 |
< |
} |
271 |
> |
d = av->pos[0] - r->rop[0]; |
272 |
> |
e1 = d * d; |
273 |
> |
d = av->pos[1] - r->rop[1]; |
274 |
> |
e1 += d * d; |
275 |
> |
d = av->pos[2] - r->rop[2]; |
276 |
> |
e1 += d * d; |
277 |
|
e1 /= av->rad * av->rad; |
278 |
|
if (e1 > ambacc*ambacc*1.21) |
279 |
|
continue; |
297 |
|
* Jittering final test reduces image artifacts. |
298 |
|
*/ |
299 |
|
wt = sqrt(e1) + sqrt(e2); |
300 |
< |
wt *= .9 + .2*urand(9015+samplendx); |
281 |
< |
if (wt > ambacc) |
300 |
> |
if (wt > ambacc*(.9+.2*urand(9015+samplendx))) |
301 |
|
continue; |
302 |
|
if (wt <= 1e-3) |
303 |
|
wt = 1e3; |
304 |
|
else |
305 |
|
wt = 1.0 / wt; |
306 |
|
wsum += wt; |
307 |
< |
extambient(ct, av, r->rop, r->ron); |
307 |
> |
extambient(ct, av, r->rop, rn); |
308 |
|
scalecolor(ct, wt); |
309 |
|
addcolor(acol, ct); |
310 |
|
} |
323 |
|
break; |
324 |
|
} |
325 |
|
if (j == 3) |
326 |
< |
wsum += sumambient(acol, r, al, at->kid+i, ck0, s); |
326 |
> |
wsum += sumambient(acol, r, rn, al, at->kid+i, ck0, s); |
327 |
|
} |
328 |
|
return(wsum); |
329 |
|
} |
330 |
|
|
331 |
|
|
332 |
|
double |
333 |
< |
makeambient(acol, r, al) /* make a new ambient value */ |
333 |
> |
makeambient(acol, r, rn, al) /* make a new ambient value */ |
334 |
|
COLOR acol; |
335 |
|
register RAY *r; |
336 |
+ |
FVECT rn; |
337 |
|
int al; |
338 |
|
{ |
339 |
|
AMBVAL amb; |
340 |
|
FVECT gp, gd; |
341 |
|
/* compute weight */ |
342 |
|
amb.weight = pow(AVGREFL, (double)al); |
343 |
< |
if (r->rweight < 0.2*amb.weight) /* heuristic */ |
343 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic */ |
344 |
|
amb.weight = r->rweight; |
345 |
|
/* compute ambient */ |
346 |
|
amb.rad = doambient(acol, r, amb.weight, gp, gd); |
347 |
< |
if (amb.rad == 0.0) |
347 |
> |
if (amb.rad <= FTINY) |
348 |
|
return(0.0); |
349 |
|
/* store it */ |
350 |
|
VCOPY(amb.pos, r->rop); |
355 |
|
VCOPY(amb.gdir, gd); |
356 |
|
/* insert into tree */ |
357 |
|
avsave(&amb); /* and save to file */ |
358 |
+ |
if (rn != r->ron) |
359 |
+ |
extambient(acol, &amb, r->rop, rn); /* texture */ |
360 |
|
return(amb.rad); |
361 |
|
} |
362 |
|
|
447 |
|
copystruct(av, aval); |
448 |
|
av->latick = ambclock; |
449 |
|
av->next = NULL; |
450 |
+ |
addcolor(avsum, av->val); /* add to sum for averaging */ |
451 |
|
nambvals++; |
452 |
|
return(av); |
453 |
|
} |
653 |
|
* when we're thrashing, which is when we need to do it. |
654 |
|
*/ |
655 |
|
#ifdef DEBUG |
656 |
< |
sprintf(errmsg, "sorting %u ambient values...", nambvals); |
656 |
> |
sprintf(errmsg, "sorting %u ambient values at ambclock=%lu...", |
657 |
> |
nambvals, ambclock); |
658 |
|
eputs(errmsg); |
659 |
|
#endif |
660 |
|
i_avlist = 0; |
684 |
|
free((char *)avlist2); |
685 |
|
/* compute new sort interval */ |
686 |
|
sortintvl = ambclock - lastsort; |
687 |
< |
if (sortintvl > MAX_SORT_INTVL) |
687 |
> |
if (sortintvl >= MAX_SORT_INTVL/2) |
688 |
|
sortintvl = MAX_SORT_INTVL; |
689 |
|
else |
690 |
|
sortintvl <<= 1; /* wait twice as long next */ |
739 |
|
if (fseek(ambinp, lastpos, 0) < 0) |
740 |
|
goto seekerr; |
741 |
|
while (n >= AMBVALSIZ) { /* load contributed values */ |
742 |
< |
readambval(&avs, ambinp); |
742 |
> |
if (!readambval(&avs, ambinp)) { |
743 |
> |
sprintf(errmsg, |
744 |
> |
"ambient file corrupted near character %ld", |
745 |
> |
flen - n); |
746 |
> |
error(WARNING, errmsg); |
747 |
> |
break; |
748 |
> |
} |
749 |
|
avinsert(avstore(&avs)); |
750 |
|
n -= AMBVALSIZ; |
751 |
|
} |