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Fix TSMesh::castRay() and small collision mesh

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This is the fix outlined in
https://github.com/GarageGames/Torque3D/issues/485
This commit is contained in:
DavidWyand-GG 2013-11-05 15:40:48 -05:00
parent 710d616d0f
commit 1923838f63
1 changed files with 25 additions and 10 deletions
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35
Engine/source/ts/tsMesh.cpp
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@ -876,18 +876,33 @@ bool TSMesh::castRayRendered( S32 frame, const Point3F & start, const Point3F &
bool TSMesh::addToHull( U32 idx0, U32 idx1, U32 idx2 )
{
Point3F normal;
mCross(mVertexData[idx2].vert()-mVertexData[idx0].vert(),mVertexData[idx1].vert()-mVertexData[idx0].vert(),&normal);
if ( mDot( normal, normal ) < 0.001f )
// calculate the normal of this triangle... remember, we lose precision
// when we subtract two large numbers that are very close to each other,
// so depending on how we calculate the normal, we could get a
// different result. so, we will calculate the normal three different
// ways and take the one that gives us the largest vector before we
// normalize.
Point3F normal1, normal2, normal3;
mCross(mVertexData[idx2].vert()-mVertexData[idx0].vert(),mVertexData[idx1].vert()-mVertexData[idx0].vert(),&normal1);
mCross(mVertexData[idx0].vert()-mVertexData[idx1].vert(),mVertexData[idx2].vert()-mVertexData[idx1].vert(),&normal2);
mCross(mVertexData[idx1].vert()-mVertexData[idx2].vert(),mVertexData[idx0].vert()-mVertexData[idx2].vert(),&normal3);
Point3F normal = normal1;
F32 greatestMagSquared = mDot(normal1, normal1);
F32 magSquared = mDot(normal2, normal2);
if (magSquared > greatestMagSquared)
{
mCross( mVertexData[idx0].vert() - mVertexData[idx1].vert(), mVertexData[idx2].vert() - mVertexData[idx1].vert(), &normal );
if ( mDot( normal, normal ) < 0.001f )
{
mCross( mVertexData[idx1].vert() - mVertexData[idx2].vert(), mVertexData[idx0].vert() - mVertexData[idx2].vert(), &normal );
if ( mDot( normal, normal ) < 0.001f )
return false;
}
normal = normal2;
greatestMagSquared = magSquared;
}
magSquared = mDot(normal3, normal3);
if (magSquared > greatestMagSquared)
{
normal = normal3;
greatestMagSquared = magSquared;
}
if (mDot(normal, normal) < 0.00000001f)
return false;
normal.normalize();
F32 k = mDot( normal, mVertexData[idx0].vert() );
for ( S32 i = 0; i < planeNormals.size(); i++ )