Options for the initial location of each emitted particle, used by the
- iOS 8.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
emitterShape property determines the shape of the space in which new particles can be emitted, and the
birthLocation property determines the locations of new particles relative to this shape.
To make a system’s particles emit from a single point, set the
emitterShape property to
nil (the default). In this case, SceneKit ignores the
Managing Particle Emission Locations
The shape of the region of space where the system spawns new particles.
The possible locations for newly spawned particles, relative to the emitter shape.
The possible initial directions for newly spawned particles, relative to the emitter shape.
The range, in degrees, of randomized initial particle directions. Animatable.