speedFactor
A multiplier for the speed at which SceneKit runs the particle simulation. Animatable.
Declaration
var speedFactor: CGFloat { get set }Discussion
Use this property to speed up or slow down the overall behavior of a particle system without changing the many individual properties (such as acceleration, particleAngularVelocity, and particleBounce) that affect the motion of particles.
The default value is 1.0. Lower values slow down the effect; higher values make the effect run faster.
You can animate changes to this property’s value. See Animating SceneKit Content.