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Fix cycles intersection issue with overlapping faces on windows 32 bit and CPU

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without SSE3 support, due to 80 bit precision float register being used for one
bounding box but not the one next to it.
This commit is contained in:
Brecht Van Lommel
2013-02-04 16:12:37 +00:00
parent 52303db217
commit 7c9d993347
10 changed files with 166 additions and 40 deletions
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24
intern/cycles/kernel/kernel_bvh.h
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@@ -126,21 +126,21 @@ __device_inline void bvh_node_intersect(KernelGlobals *kg,
/* intersect ray against child nodes */
float3 ood = P * idir;
float c0lox = n0xy.x * idir.x - ood.x;
float c0hix = n0xy.y * idir.x - ood.x;
float c0loy = n0xy.z * idir.y - ood.y;
float c0hiy = n0xy.w * idir.y - ood.y;
float c0loz = nz.x * idir.z - ood.z;
float c0hiz = nz.y * idir.z - ood.z;
NO_EXTENDED_PRECISION float c0lox = n0xy.x * idir.x - ood.x;
NO_EXTENDED_PRECISION float c0hix = n0xy.y * idir.x - ood.x;
NO_EXTENDED_PRECISION float c0loy = n0xy.z * idir.y - ood.y;
NO_EXTENDED_PRECISION float c0hiy = n0xy.w * idir.y - ood.y;
NO_EXTENDED_PRECISION float c0loz = nz.x * idir.z - ood.z;
NO_EXTENDED_PRECISION float c0hiz = nz.y * idir.z - ood.z;
NO_EXTENDED_PRECISION float c0min = max4(min(c0lox, c0hix), min(c0loy, c0hiy), min(c0loz, c0hiz), 0.0f);
NO_EXTENDED_PRECISION float c0max = min4(max(c0lox, c0hix), max(c0loy, c0hiy), max(c0loz, c0hiz), t);
float c1loz = nz.z * idir.z - ood.z;
float c1hiz = nz.w * idir.z - ood.z;
float c1lox = n1xy.x * idir.x - ood.x;
float c1hix = n1xy.y * idir.x - ood.x;
float c1loy = n1xy.z * idir.y - ood.y;
float c1hiy = n1xy.w * idir.y - ood.y;
NO_EXTENDED_PRECISION float c1loz = nz.z * idir.z - ood.z;
NO_EXTENDED_PRECISION float c1hiz = nz.w * idir.z - ood.z;
NO_EXTENDED_PRECISION float c1lox = n1xy.x * idir.x - ood.x;
NO_EXTENDED_PRECISION float c1hix = n1xy.y * idir.x - ood.x;
NO_EXTENDED_PRECISION float c1loy = n1xy.z * idir.y - ood.y;
NO_EXTENDED_PRECISION float c1hiy = n1xy.w * idir.y - ood.y;
NO_EXTENDED_PRECISION float c1min = max4(min(c1lox, c1hix), min(c1loy, c1hiy), min(c1loz, c1hiz), 0.0f);
NO_EXTENDED_PRECISION float c1max = min4(max(c1lox, c1hix), max(c1loy, c1hiy), max(c1loz, c1hiz), t);