public void TestNormalTransFormedShape()
{
var shape = new TestAShape
{
Transform = Matrix4.Scaling(1, 0.5, 1) * Matrix4.RotationZ(System.Math.PI / 5)
};
var n = shape.Normal(Tuple.Point(0, 0.70711, -0.70711));
Assert.AreEqual(Tuple.Vector(0, 0.97014, -0.24254), n);
}
public void TestNormalTranslatedShape()
{
var shape = new TestAShape
{
Transform = Matrix4.Translation(0, 1, 0)
};
var n = shape.Normal(Tuple.Point(0, 1.70711, -0.70711));
Assert.AreEqual(Tuple.Vector(0, 0.70711, -0.70711), n);
}