public Tuple ShadeHit(World w, Computation comps, int remaining)
{
Tuple surface = Tuple.Color(0, 0, 0);
foreach (var light in w.Lights)
{
bool shadowed = w.IsShadowed(light, comps.OverPoint);
surface += Lighting(comps.Material,
comps.Object,
light,
comps.Point,
comps.Eyev,
comps.Normalv,
shadowed);
}
Tuple reflected = ReflectedColor(w, comps, remaining);
Tuple refracted = RefractedColor(w, comps, remaining);
Material material = comps.Material;
if (material.Reflective > 0 && material.Transparency > 0)
{
float reflectance = Fresnel.Schlick(comps);
return(surface + reflected * reflectance + refracted * (1 - reflectance));
}
return(surface + reflected + refracted);
}
public double IntensityAt(Point point, World world)
{
var total = 0.0;
for (int v = 0; v < this.VSteps; v++)
{
for (int u = 0; u < this.USteps; u++)
{
var light_position = this.PointOnLight(u, v);
if (!world.IsShadowed(light_position, point))
{
total = total + 1.0;
}
}
}
return(total / this.Samples);
}
