public void Test_UVNorms()
{
// Check that GetUNorm and GetVNorm compute right-handed normals for
// an edge in the increasing U or V direction.
for (int face = 0; face < 6; ++face)
{
for (double x = -1; x <= 1; x += 1 / 1024.0)
{
Assert2.DoubleEqual(S2.FaceUVtoXYZ(face, x, -1)
.CrossProd(S2.FaceUVtoXYZ(face, x, 1))
.Angle(S2.GetUNorm(face, x)), 0);
Assert2.DoubleEqual(S2.FaceUVtoXYZ(face, -1, x)
.CrossProd(S2.FaceUVtoXYZ(face, 1, x))
.Angle(S2.GetVNorm(face, x)), 0);
}
}
}