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fix for ray-vs-AACubeShape intersection test

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This commit is contained in:
Andrew Meadows 2014-09-12 08:40:48 -07:00
parent a9957ac7df
commit 825be3e1e7
1 changed files with 5 additions and 4 deletions
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9
libraries/shared/src/AACubeShape.cpp
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@ -36,11 +36,12 @@ bool AACubeShape::findRayIntersection(RayIntersectionInfo& intersection) const {
}
// check for tuncated/short ray
const float maxBA = glm::min(intersection._rayLength, intersection._hitDistance) + halfSide;
if (maxBA * maxBA > a * a + b2) {
// maxLength = maximum possible distance between rayStart and center of cube
const float maxLength = glm::min(intersection._rayLength, intersection._hitDistance) + r;
float maxBA2 = maxLength * maxLength;
if (a * a + b2 > maxLength * maxLength) {
// ray is not long enough to reach cube's bounding sphere
// NOTE: we don't fall in here when ray's length if FLT_MAX because maxBA^2 will be NaN
// and all NaN comparisons are false
// NOTE: we don't fall in here when ray's length if FLT_MAX because maxLength^2 will be inf or nan
return false;
}