Data describing the estimated lighting environment in all directions for a light probe.
- iOS 11.0+
- macOS 10.13+
- tvOS 11.0+
- watchOS 4.0+
Spherical harmonic coefficients describe the distribution of light around a point in a format that can be used efficiently in real-time rendering. SceneKit supports spherical harmonics only for lights of the
The data is an 32-bit floating-point values, containing three noninterleaved data sets corresponding to the red, green, and blue sets of coefficients. SceneKit supports only level 2 spherical harmonics, so the array has 3 sets of 9 values, or 27 values total.