Explanation:
A DirectionalLight is a type of light source in VRML. There are three types
of light in VRML 2.0:
- PointLights, which represent a light source as a single point in space,
- SpotLights, which originate at a point and create a cone of light in a certain
direction, and
- DirectionalLights, which seem to come from a given direction but have
parallel light rays.