public void ReflectedColorForNonReflectiveMaterialIsBlack()
{
var w = World.Default();
var r = new Ray(new Point(0, 0, 0), new Vector(0, 0, 1));
var shape = w.Objects[1];
shape.Material.Ambient = 1f;
var i = new Intersection(1, shape);
var comps = new IntersectionInfo(i, r);
PhongShading.ReflectedColor(w, comps).Should().Be(Colors.Black);
}
public void ReflectedColorIsBlackIfRemainingBouncesIsZero()
{
var w = World.Default();
var shape = new Plane();
shape.SetMaterial(new Material {
Reflective = 0.5f
});
shape.SetTransform(Transform.Translate(0, -1, 0));
w.AddObject(shape);
var r = new Ray(new Point(0, 0, -3), new Vector(0, -MathF.Sqrt(2f) / 2f, MathF.Sqrt(2f) / 2f));
var i = new Intersection(MathF.Sqrt(2f), shape);
var comps = new IntersectionInfo(i, r);
PhongShading.ReflectedColor(w, comps, 0).Should().Be(Colors.Black);
}
public void ReflectedColorForReflectiveMaterialIsNotBlack()
{
var w = World.Default();
var shape = new Plane();
shape.SetMaterial(new Material {
Reflective = 0.5f
});
shape.SetTransform(Transform.Translate(0, -1, 0));
w.AddObject(shape);
var r = new Ray(new Point(0, 0, -3), new Vector(0, -MathF.Sqrt(2f) / 2f, MathF.Sqrt(2f) / 2f));
var i = new Intersection(MathF.Sqrt(2f), shape);
var comps = new IntersectionInfo(i, r);
PhongShading.ReflectedColor(w, comps).Should().Be(new Color(0.19041f, 0.2380f, 0.14281f));
}