public void TestAreaLightIntensityFunction()
{
var w = World.Default;
var corner = new Point(-0.5, -0.5, -5);
var v1 = Vector.VectorX;
var v2 = Vector.VectorY;
var light = new AreaLight(corner, v1, 2, v2, 2, Color.White);
light.JitterBy = Sequence.Generate(0.5, 0.5, 0.5);
Assert.AreEqual(light.IntensityAt(new Point(0, 0, 2), w), 0.0, epsilon);
Assert.AreEqual(light.IntensityAt(new Point(1, -1, 2), w), 0.25, epsilon);
Assert.AreEqual(light.IntensityAt(new Point(1.5, 0, 2), w), 0.5, epsilon);
Assert.AreEqual(light.IntensityAt(new Point(1.25, 1.25, 3), w), 0.75, epsilon);
Assert.AreEqual(light.IntensityAt(new Point(0, 0, -2), w), 1.0, epsilon);
}
public void AreaLight_ShouldWorkWithJitteredSamples(Point point, double result)
{
var w = new World();
w.CreateDefaultWorld();
var corner = new Point(-0.5, -0.5, -5);
var v1 = new Vector(1, 0, 0);
var v2 = new Vector(0, 1, 0);
var light = new AreaLight(corner, v1, 2, v2, 2, Color.White);
light.JitterBy = new Sequence(new List <double> {
0.7, 0.3, 0.9, 0.1, 0.5
});
var pt = point;
var intensity = light.IntensityAt(pt, w);
Assert.Equal(result, intensity, 2);
}
