| 137 |
|
|
| 138 |
|
|
| 139 |
|
static void setPhotonPortNormal (EmissionMap* emap) |
| 140 |
< |
/* Set normal for current photon port partition based on its orientation */ |
| 140 |
> |
/* Set normal for current photon port partition (if defined) based on its |
| 141 |
> |
* orientation */ |
| 142 |
|
{ |
| 142 |
– |
/* Extract photon port orientation flags, set surface normal as follows: |
| 143 |
– |
-- Port oriented forwards --> flip surface normal to point |
| 144 |
– |
outwards, since normal points inwards per mkillum convention) |
| 145 |
– |
-- Port oriented backwards --> surface normal is NOT flipped, |
| 146 |
– |
since it already points inwards. |
| 147 |
– |
-- Port is bidirectionally/bilaterally oriented --> flip normal based |
| 148 |
– |
on the parity of the current partition emap -> partitionCnt. |
| 149 |
– |
In this case, photon emission alternates between port front/back |
| 150 |
– |
faces for consecutive partitions. |
| 151 |
– |
*/ |
| 152 |
– |
int i, portFlags = PMAP_GETPORTFLAGS(emap -> port -> sflags); |
| 143 |
|
|
| 144 |
< |
if ( |
| 145 |
< |
portFlags == PMAP_PORTFWD || |
| 146 |
< |
portFlags == PMAP_PORTBI && !(emap -> partitionCnt & 1) |
| 147 |
< |
) |
| 148 |
< |
for (i = 0; i < 3; i++) |
| 149 |
< |
emap -> ws [i] = -emap -> ws [i]; |
| 144 |
> |
int i, portFlags; |
| 145 |
> |
|
| 146 |
> |
if (emap -> port) { |
| 147 |
> |
/* Extract photon port orientation flags, set surface normal as follows: |
| 148 |
> |
-- Port oriented forwards --> flip surface normal to point outwards, |
| 149 |
> |
since normal points inwards per mkillum convention) |
| 150 |
> |
-- Port oriented backwards --> surface normal is NOT flipped, since |
| 151 |
> |
it already points inwards. |
| 152 |
> |
-- Port is bidirectionally/bilaterally oriented --> flip normal based |
| 153 |
> |
on the parity of the current partition emap -> partitionCnt. In |
| 154 |
> |
this case, photon emission alternates between port front/back |
| 155 |
> |
faces for consecutive partitions. |
| 156 |
> |
*/ |
| 157 |
> |
portFlags = PMAP_GETPORTFLAGS(emap -> port -> sflags); |
| 158 |
> |
|
| 159 |
> |
if ( |
| 160 |
> |
portFlags == PMAP_PORTFWD || |
| 161 |
> |
portFlags == PMAP_PORTBI && !(emap -> partitionCnt & 1) |
| 162 |
> |
) |
| 163 |
> |
for (i = 0; i < 3; i++) |
| 164 |
> |
emap -> ws [i] = -emap -> ws [i]; |
| 165 |
> |
} |
| 166 |
|
} |
| 167 |
|
|
| 168 |
|
|
| 764 |
|
sizeof(EmissionSample) * emap -> numTheta * emap -> numPhi |
| 765 |
|
); |
| 766 |
|
if (!emap -> samples) |
| 767 |
< |
error(USER, "can't allocate emission PDF"); |
| 767 |
> |
error(USER, "can't allocate emission PDF"); |
| 768 |
|
|
| 769 |
|
VCOPY(r.rorg, emap -> photonOrg); |
| 770 |
|
VCOPY(r.rop, emap -> photonOrg); |
| 893 |
|
if (sample -> cdf < du) |
| 894 |
|
lo = i + 1; |
| 895 |
|
} |
| 896 |
< |
|
| 896 |
> |
|
| 897 |
> |
/* Finalise found sample */ |
| 898 |
> |
i = (lo + hi) >> 1; |
| 899 |
> |
sample = emap -> samples + i - 1; |
| 900 |
> |
|
| 901 |
|
/* This is a uniform mapping, mon */ |
| 902 |
|
cosTheta = (1 - |
| 903 |
|
(sample -> theta + pmapRandom(emitState)) * |
