public Color L(Point point, out Point lightPos, out Normal lightDir)
{
Vector dir = this.Position - point;
float dist = dir.Magnitude();
lightDir = new Normal(dir);
lightPos = this.Position;
return (this.E / (dist * dist));
}
public static Point Perturb(Point point, Normal toward)
{
return point + PERTURB * toward;
}
public float f(Normal wi, Normal wo)
{
return (float)(1 / System.Math.PI);
}
public Ray(Point origin, Normal direction)
{
this.Origin = origin;
this.Direction = direction;
}