129 |
|
double newa |
130 |
|
) |
131 |
|
{ |
132 |
< |
double ambdiff; |
133 |
< |
|
134 |
< |
if (newa < 0.0) |
135 |
< |
newa = 0.0; |
136 |
< |
ambdiff = fabs(newa - ambacc); |
137 |
< |
if (ambdiff >= .01 && (ambacc = newa) > FTINY) { |
138 |
< |
qambacc = sqrt(sqrt(ambacc)); |
132 |
> |
double olda = qambacc*qambacc*qambacc*qambacc; |
133 |
> |
|
134 |
> |
newa *= (newa > 0); |
135 |
> |
if (fabs(newa - olda) >= .05*(newa + olda)) { |
136 |
> |
qambacc = sqrt(sqrt(ambacc = newa)); |
137 |
|
if (nambvals > 0) |
138 |
|
sortambvals(1); /* rebuild tree */ |
139 |
|
} |
150 |
|
ambdone(); |
151 |
|
/* init ambient limits */ |
152 |
|
setambres(ambres); |
153 |
< |
qambacc = sqrt(sqrt(ambacc *= (ambacc > FTINY))); |
153 |
> |
setambacc(ambacc); |
154 |
|
if (ambfile == NULL || !ambfile[0]) |
155 |
|
return; |
156 |
|
if (ambacc <= FTINY) { |
389 |
|
if (delta_r2 >= maxangle*maxangle) |
390 |
|
continue; |
391 |
|
/* |
392 |
+ |
* Modified ray behind test |
393 |
+ |
*/ |
394 |
+ |
VSUB(ck0, av->pos, r->rop); |
395 |
+ |
d = DOT(ck0, uvw[2]); |
396 |
+ |
if (d < -minarad*qambacc-.001) |
397 |
+ |
continue; |
398 |
+ |
d /= av->rad[0]; |
399 |
+ |
delta_t2 = d*d; |
400 |
+ |
if (delta_t2 >= qambacc*qambacc) |
401 |
+ |
continue; |
402 |
+ |
/* |
403 |
|
* Elliptical radii test based on Hessian |
404 |
|
*/ |
405 |
|
decodedir(uvw[0], av->udir); |
406 |
|
VCROSS(uvw[1], uvw[2], uvw[0]); |
398 |
– |
VSUB(ck0, av->pos, r->rop); |
407 |
|
d = DOT(ck0, uvw[0]) / av->rad[0]; |
400 |
– |
delta_t2 = d*d; |
401 |
– |
d = DOT(ck0, uvw[1]) / av->rad[1]; |
408 |
|
delta_t2 += d*d; |
409 |
< |
d = DOT(ck0, uvw[2]) / av->rad[0]; |
409 |
> |
d = DOT(ck0, uvw[1]) / av->rad[1]; |
410 |
|
delta_t2 += d*d; |
411 |
|
if (delta_t2 >= qambacc*qambacc) |
412 |
|
continue; |