protected (bool, float, float, float) TestLocalIntersection(Ray localRay)
{
Tuple dirCrossE2 = localRay.Direction.Cross(E2);
float det = E1.Dot(dirCrossE2);
if (Abs(det) < Constants.floatEps)
{
return(false, 0, 0, 0);
}
float invDet = 1.0f / det;
Tuple p1ToOrigin = localRay.Origin - P1;
float u = invDet * p1ToOrigin.Dot(dirCrossE2);
if (u < 0 || u > 1)
{
return(false, 0, 0, 0);
}
Tuple originCrossE1 = p1ToOrigin.Cross(E1);
float v = invDet * localRay.Direction.Dot(originCrossE1);
if (v < 0 || (u + v) > 1)
{
return(false, 0, 0, 0);
}
float t = invDet * E2.Dot(originCrossE1);
return(true, t, u, v);
}