public void LightIntensityAtPoint()
{
var w = World.Default();
var light = w.Lights[0];
PhongShading.IntensityAt(w, new Point(0, 1.0001f, 0), light).Should().BeApproximately(1.0f, 0.0001f);
PhongShading.IntensityAt(w, new Point(-1.0001f, 0, 0), light).Should().BeApproximately(1.0f, 0.0001f);
PhongShading.IntensityAt(w, new Point(0, 0, -1.0001f), light).Should().BeApproximately(1.0f, 0.0001f);
PhongShading.IntensityAt(w, new Point(0, 0, 1.0001f), light).Should().BeApproximately(0.0f, 0.0001f);
PhongShading.IntensityAt(w, new Point(1.0001f, 0, 0), light).Should().BeApproximately(0.0f, 0.0001f);
PhongShading.IntensityAt(w, new Point(0, -1.0001f, 0), light).Should().BeApproximately(0.0f, 0.0001f);
PhongShading.IntensityAt(w, new Point(0, 0, 0), light).Should().BeApproximately(0.0f, 0.0001f);
}
public void CalculateAreaLightIntensityWithJitter()
{
var w = World.Default();
var corner = new Point(-0.5f, -0.5f, -5);
var v1 = new Vector(1, 0, 0);
var v2 = new Vector(0, 1, 0);
var light = new AreaLight(corner, v1, 2, v2, 2, Colors.White, new Sequence(0.7f, 0.3f, 0.9f, 0.1f, 0.5f));
PhongShading.IntensityAt(w, new Point(0, 0, 2), light).Should().BeApproximately(0.0f, 0.0001f);
PhongShading.IntensityAt(w, new Point(1, -1, 2), light).Should().BeApproximately(0.75f, 0.0001f);
PhongShading.IntensityAt(w, new Point(1.5f, 0, 2), light).Should().BeApproximately(0.75f, 0.0001f);
PhongShading.IntensityAt(w, new Point(1.25f, 1.25f, 3), light).Should().BeApproximately(0.75f, 0.0001f);
PhongShading.IntensityAt(w, new Point(0f, 0f, -2), light).Should().BeApproximately(1.0f, 0.0001f);
}