| 60 |
|
#endif |
| 61 |
|
|
| 62 |
|
static COLOR avsum = BLKCOLOR; /* computed ambient value sum */ |
| 63 |
< |
static unsigned int nambvals = 0; /* number of computed ambient values */ |
| 63 |
> |
static unsigned int nambvals = 0; /* total number of indirect values */ |
| 64 |
> |
static unsigned int nambshare = 0; /* number of values from file */ |
| 65 |
|
static unsigned long ambclock = 0; /* ambient access clock */ |
| 66 |
|
static unsigned long lastsort = 0; /* time of last value sort */ |
| 67 |
|
static long sortintvl = SORT_INTVL; /* time until next sort */ |
| 70 |
|
/* |
| 71 |
|
* Track access times unless we are sharing ambient values |
| 72 |
|
* through memory on a multiprocessor, when we want to avoid |
| 73 |
< |
* claiming our own memory (copy on write). |
| 73 |
> |
* claiming our own memory (copy on write). Go ahead anyway |
| 74 |
> |
* if more than two thirds of our values are unshared. |
| 75 |
|
*/ |
| 76 |
< |
#define tracktime (shm_boundary == NULL || ambfp == NULL) |
| 76 |
> |
#define tracktime (shm_boundary == NULL || nambvals > 3*nambshare) |
| 77 |
|
|
| 78 |
|
#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
| 79 |
|
|
| 145 |
|
avinsert(avstore(&amb)); |
| 146 |
|
/* align */ |
| 147 |
|
fseek(ambfp, -((ftell(ambfp)-headlen)%AMBVALSIZ), 1); |
| 148 |
+ |
nambshare = nambvals; |
| 149 |
|
} else if ((ambfp = fopen(afile, "w+")) != NULL) |
| 150 |
|
initambfile(1); |
| 151 |
|
else { |
| 179 |
|
} |
| 180 |
|
|
| 181 |
|
|
| 182 |
< |
ambient(acol, r) /* compute ambient component for ray */ |
| 182 |
> |
ambient(acol, r, nrm) /* compute ambient component for ray */ |
| 183 |
|
COLOR acol; |
| 184 |
|
register RAY *r; |
| 185 |
+ |
FVECT nrm; |
| 186 |
|
{ |
| 187 |
|
static int rdepth = 0; /* ambient recursion */ |
| 188 |
|
double d; |
| 209 |
|
sortambvals(0); |
| 210 |
|
/* get ambient value */ |
| 211 |
|
setcolor(acol, 0.0, 0.0, 0.0); |
| 212 |
< |
d = sumambient(acol, r, rdepth, |
| 212 |
> |
d = sumambient(acol, r, nrm, rdepth, |
| 213 |
|
&atrunk, thescene.cuorg, thescene.cusize); |
| 214 |
|
if (d > FTINY) { |
| 215 |
|
scalecolor(acol, 1.0/d); |
| 216 |
|
return; |
| 217 |
|
} |
| 218 |
|
rdepth++; /* need to cache new value */ |
| 219 |
< |
d = makeambient(acol, r, rdepth-1); |
| 219 |
> |
d = makeambient(acol, r, nrm, rdepth-1); |
| 220 |
|
rdepth--; |
| 221 |
|
if (d > FTINY) |
| 222 |
|
return; |
| 234 |
|
|
| 235 |
|
|
| 236 |
|
double |
| 237 |
< |
sumambient(acol, r, al, at, c0, s) /* get interpolated ambient value */ |
| 237 |
> |
sumambient(acol, r, rn, al, at, c0, s) /* get interpolated ambient value */ |
| 238 |
|
COLOR acol; |
| 239 |
|
register RAY *r; |
| 240 |
+ |
FVECT rn; |
| 241 |
|
int al; |
| 242 |
|
AMBTREE *at; |
| 243 |
|
FVECT c0; |
| 301 |
|
else |
| 302 |
|
wt = 1.0 / wt; |
| 303 |
|
wsum += wt; |
| 304 |
< |
extambient(ct, av, r->rop, r->ron); |
| 304 |
> |
extambient(ct, av, r->rop, rn); |
| 305 |
|
scalecolor(ct, wt); |
| 306 |
|
addcolor(acol, ct); |
| 307 |
|
} |
| 320 |
|
break; |
| 321 |
|
} |
| 322 |
|
if (j == 3) |
| 323 |
< |
wsum += sumambient(acol, r, al, at->kid+i, ck0, s); |
| 323 |
> |
wsum += sumambient(acol, r, rn, al, at->kid+i, ck0, s); |
| 324 |
|
} |
| 325 |
|
return(wsum); |
| 326 |
|
} |
| 327 |
|
|
| 328 |
|
|
| 329 |
|
double |
| 330 |
< |
makeambient(acol, r, al) /* make a new ambient value */ |
| 330 |
> |
makeambient(acol, r, rn, al) /* make a new ambient value */ |
| 331 |
|
COLOR acol; |
| 332 |
|
register RAY *r; |
| 333 |
+ |
FVECT rn; |
| 334 |
|
int al; |
| 335 |
|
{ |
| 336 |
|
AMBVAL amb; |
| 352 |
|
VCOPY(amb.gdir, gd); |
| 353 |
|
/* insert into tree */ |
| 354 |
|
avsave(&amb); /* and save to file */ |
| 355 |
+ |
if (rn != r->ron) |
| 356 |
+ |
extambient(acol, &amb, r->rop, rn); /* texture */ |
| 357 |
|
return(amb.rad); |
| 358 |
|
} |
| 359 |
|
|
