addBehavior(_:)

Physics behaviors constrain or modify the effects of the physics simulation on sets of physics bodies. For example, the SCNPhysicsHingeJoint behavior causes two bodies to move as if connected by a hinge that pivots around a specific axis, and the SCNPhysicsVehicle behavior causes a body to roll like a car or other wheeled vehicle.

To use a behavior in your scene, follow these steps:

1. Create SCNPhysicsBody objects and attach them to each node that participates in the behavior.

2. Create and configure a behavior object joining the physics bodies. See SCNPhysicsBehavior for a list of behavior classes.

3. Call addBehavior(_:) on your scene’s physics world object to add the behavior to the physics simulation.