velocityFactor
A multiplier affecting how SceneKit applies translations computed by the physics simulation to the node containing the physics body.
Declaration
var velocityFactor: SCNVector3 { get set }Discussion
Use this property to constrain or restrict the effect of physics simulation on the node containing the physics body. For example, you can force a body to move in only two dimensions by setting its velocity factor to {1.0, 1.0, 0.0}.