Specifies the seed used to initialize the random number generator.
- iOS 5.0+
- macOS 10.6+
- Mac Catalyst 13.0+
- tvOS 9.0+
- Core Animation
Each layer has its own random number generator state. Emitter cell properties that are defined as a mean and a range, such as a cell’s
speed, the value of the properties are uniformly distributed in the interval [M - R/2, M + R/2].