A light source that illuminates a 3D scene from an area with a specific shape.
- iOS 9.0+
- macOS 10.11+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- Model I/O
Unlike other light sources that illuminate a scene from a single point or direction, an area light has a specific shape. The shape of an area light is a two-dimensional figure in the xy-plane of the light’s local coordinate space, and its illumination is directed in the negative z-axis direction (spreading out from that direction according to the inherited
MDLPhotometric classes can describe lights with interesting shapes. An area light offers a simpler design that can be implemented with better rendering performance, and a photometric light offers design that better models real-world light fixtures at the cost of higher computational complexity.