A dictionary that optionally associates particle properties with objects that animate a property’s value for each particle.
- iOS 8.0+
- macOS 10.10+
- tvOS 9.0+
- watchOS 3.0+
Each key in this dictionary is one of the constants listed in Particle Property Keys, and the value for each key is a
SCNParticle object responsible for varying that property over time. Use particle property controllers to add efficient animations that change the appearance or behavior of each particle emitted by the system.
To add more complex behavior that cannot be described by a
SCNParticle object, use the
add to add a particle modifier block. However, be aware that particle modifier blocks can severely impact rendering performance.