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#include "copyright.h" |
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#include "ray.h" |
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#include "ambient.h" |
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#include "random.h" |
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#ifdef NEWAMB |
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#else /* ! NEWAMB */ |
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void |
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inithemi( /* initialize sampling hemisphere */ |
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< |
register AMBHEMI *hp, |
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AMBHEMI *hp, |
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COLOR ac, |
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RAY *r, |
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double wt |
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) |
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{ |
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double d; |
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register int i; |
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int i; |
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/* set number of divisions */ |
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if (ambacc <= FTINY && |
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wt > (d = 0.8*intens(ac)*r->rweight/(ambdiv*minweight))) |
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int |
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divsample( /* sample a division */ |
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register AMBSAMP *dp, |
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AMBSAMP *dp, |
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AMBHEMI *h, |
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RAY *r |
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) |
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double xd, yd, zd; |
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double b2; |
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double phi; |
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register int i; |
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int i; |
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/* ambient coefficient for weight */ |
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if (ambacc > FTINY) |
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setcolor(ar.rcoef, AVGREFL, AVGREFL, AVGREFL); |
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ar.rdir[i] = xd*h->ux[i] + |
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yd*h->uy[i] + |
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zd*h->uz[i]; |
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checknorm(ar.rdir); |
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dimlist[ndims++] = dp->t*h->np + dp->p + 90171; |
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rayvalue(&ar); |
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ndims--; |
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{ |
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const AMBSAMP *d1 = (const AMBSAMP *)p1; |
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const AMBSAMP *d2 = (const AMBSAMP *)p2; |
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register int c; |
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> |
int c; |
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if ( (c = d1->t - d2->t) ) |
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return(c); |
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double |
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doambient( /* compute ambient component */ |
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COLOR acol, |
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COLOR rcol, |
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RAY *r, |
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double wt, |
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FVECT pg, |
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FVECT dg |
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) |
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{ |
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double b, d; |
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double b, d=0; |
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AMBHEMI hemi; |
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AMBSAMP *div; |
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AMBSAMP dnew; |
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< |
register AMBSAMP *dp; |
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> |
double acol[3]; |
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> |
AMBSAMP *dp; |
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double arad; |
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int divcnt; |
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register int i, j; |
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int i, j; |
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/* initialize hemisphere */ |
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inithemi(&hemi, acol, r, wt); |
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inithemi(&hemi, rcol, r, wt); |
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divcnt = hemi.nt * hemi.np; |
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/* initialize */ |
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if (pg != NULL) |
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pg[0] = pg[1] = pg[2] = 0.0; |
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if (dg != NULL) |
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dg[0] = dg[1] = dg[2] = 0.0; |
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setcolor(acol, 0.0, 0.0, 0.0); |
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> |
setcolor(rcol, 0.0, 0.0, 0.0); |
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if (divcnt == 0) |
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return(0.0); |
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/* allocate super-samples */ |
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div = NULL; |
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/* sample the divisions */ |
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arad = 0.0; |
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acol[0] = acol[1] = acol[2] = 0.0; |
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if ((dp = div) == NULL) |
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dp = &dnew; |
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divcnt = 0; |
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} |
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free((void *)div); |
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} |
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copycolor(rcol, acol); |
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if (arad <= FTINY) |
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arad = maxarad; |
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else |
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void |
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comperrs( /* compute initial error estimates */ |
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AMBSAMP *da, /* assumes standard ordering */ |
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< |
register AMBHEMI *hp |
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> |
AMBHEMI *hp |
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) |
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{ |
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double b, b2; |
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int i, j; |
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< |
register AMBSAMP *dp; |
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> |
AMBSAMP *dp; |
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/* sum differences from neighbors */ |
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dp = da; |
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for (i = 0; i < hp->nt; i++) |
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posgradient( /* compute position gradient */ |
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FVECT gv, |
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AMBSAMP *da, /* assumes standard ordering */ |
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< |
register AMBHEMI *hp |
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> |
AMBHEMI *hp |
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) |
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{ |
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< |
register int i, j; |
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> |
int i, j; |
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double nextsine, lastsine, b, d; |
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double mag0, mag1; |
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double phi, cosp, sinp, xd, yd; |
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< |
register AMBSAMP *dp; |
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> |
AMBSAMP *dp; |
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|
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xd = yd = 0.0; |
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for (j = 0; j < hp->np; j++) { |
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dirgradient( /* compute direction gradient */ |
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FVECT gv, |
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AMBSAMP *da, /* assumes standard ordering */ |
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< |
register AMBHEMI *hp |
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> |
AMBHEMI *hp |
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) |
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{ |
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< |
register int i, j; |
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> |
int i, j; |
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double mag; |
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double phi, xd, yd; |
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< |
register AMBSAMP *dp; |
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> |
AMBSAMP *dp; |
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|
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xd = yd = 0.0; |
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for (j = 0; j < hp->np; j++) { |
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for (i = 0; i < 3; i++) |
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gv[i] = xd*hp->ux[i] + yd*hp->uy[i]; |
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} |
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+ |
|
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+ |
#endif /* ! NEWAMB */ |
