Classes
 ClassDescription
 AbstractLight Lightsource that colors all shaded materials evenly from any angle
 AmbientLight3D Lightsource that colors all shaded materials evenly from any angle
 DirectionalLight3D Lightsource that colors all shaded materials proportional to the dot product of the offset vector with the normal vector.
 PointLight3D Lightsource that colors all shaded materials proportional to the dot product of the distance vector with the normal vector.