public void SchlickWithSmallAngleAndN2GreaterThanN1()
{
var shape = Sphere.GlassSphere();
var ray = new Ray(new Point(0, 0.99, -2), new Vector(0, 0, 1));
var xs = new List <Intersection>
{
new Intersection(1.8589, shape),
};
var comps = xs[0].PrepareComputations(ray, xs);
var reflectance = SchlickReflectance.Schlick(comps);
Assert.IsTrue(DoubleUtils.DoubleEquals(0.48873, reflectance));
}
public void SchlickWithPerpendicularViewingAngle()
{
var shape = Sphere.GlassSphere();
var ray = new Ray(new Point(0, 0, 0), new Vector(0, 1, 0));
var xs = new List <Intersection>
{
new Intersection(-1, shape),
new Intersection(1, shape)
};
var comps = xs[1].PrepareComputations(ray, xs);
var reflectance = SchlickReflectance.Schlick(comps);
Assert.IsTrue(DoubleUtils.DoubleEquals(0.04, reflectance));
}
public void SchlickUnderTotalInternalReflection()
{
var shape = Sphere.GlassSphere();
var ray = new Ray(new Point(0, 0, Math.Sqrt(2) / 2), new Vector(0, 1, 0));
var xs = new List <Intersection>
{
new Intersection(-Math.Sqrt(2) / 2, shape),
new Intersection(Math.Sqrt(2) / 2, shape)
};
var comps = xs[1].PrepareComputations(ray, xs);
var reflectance = SchlickReflectance.Schlick(comps);
Assert.AreEqual(1.0, reflectance);
}