Lights
Light Rendering Properties (sheet 3)
- Do not illuminate. Do not affect the environment.
- Actual behavior defined by Light Rendering Behavior components, such as Flashing, Rotating, Twinkling, ...
- Are a component of Geometry (groups or primitives)
Light Sources (sheets 4 and 21)
- Do illuminate. Do affect the environment.
- Three subclasses: Infinite, Positional, and Spot
- Light Source is a component of Aggregate Geometry.
- A Light Source only affects the Aggregate Geometry and the components of that Aggregate Geometry, regardless of the spatial location of the Light Source.