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improved the clipping bugfix

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Wenzel Jakob 2011-09-03 14:32:28 -04:00
parent 49a2862d8f
commit e88f0bda1e
1 changed files with 16 additions and 12 deletions
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28
src/libcore/triangle.cpp
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@ -126,20 +126,24 @@ AABB Triangle::getClippedAABB(const Point *positions, const AABB &aabb) const {
for (int j=0; j<3; ++j) { for (int j=0; j<3; ++j) {
/* Now this is really paranoid! */ /* Now this is really paranoid! */
double pos_d = vertices1[i][j]; double pos_d = vertices1[i][j];
Float pos_f = (Float) pos_d; float pos_f = (float) pos_d;
Float pos_roundedDown, pos_roundedUp; Float pos_roundedDown, pos_roundedUp;
#if defined(SINGLE_PRECISION) if (pos_f < pos_d) {
pos_roundedUp = nextafterf(pos_f, /* Float value is too small */
std::numeric_limits<float>::infinity()); pos_roundedDown = pos_f;
pos_roundedDown = nextafterf(pos_f, pos_roundedUp = nextafterf(pos_f,
-std::numeric_limits<float>::infinity()); std::numeric_limits<float>::infinity());
#else } else if (pos_f > pos_d) {
pos_roundedUp = nextafter(pos_f, /* Float value is too large */
std::numeric_limits<float>::infinity()); pos_roundedUp = pos_f;
pos_roundedDown = nextafter(pos_f, pos_roundedDown = nextafterf(pos_f,
-std::numeric_limits<float>::infinity()); -std::numeric_limits<float>::infinity());
#endif } else {
/* Double value is exactly representable */
pos_roundedDown = pos_roundedUp = pos_f;
}
result.min[j] = std::min(result.min[j], pos_roundedDown); result.min[j] = std::min(result.min[j], pos_roundedDown);
result.max[j] = std::max(result.max[j], pos_roundedUp); result.max[j] = std::max(result.max[j], pos_roundedUp);
} }