---
title: physicsBody
framework: scenekit
role: symbol
role_heading: Instance Property
path: scenekit/scnnode/physicsbody
---

# physicsBody

The physics body associated with the node.

## Declaration

```swift
var physicsBody: SCNPhysicsBody? { get set }
```

## Discussion

Discussion The default value is nil, specifying that the node does not participate in the physics simulation at all. If you provide a physics body, SceneKit updates the node’s position and orientation each time it processes a step of its physics simulation. For more information on SceneKit’s physics system, see SCNPhysicsWorld.

## See Also

### Adding Physics to a Node

- [physicsField](scenekit/scnnode/physicsfield.md)