---
title: colliderNodes
framework: scenekit
role: symbol
role_heading: Instance Property
path: scenekit/scnparticlesystem/collidernodes
---

# colliderNodes

The nodes whose geometry the system’s particles can collide with.

## Declaration

```swift
var colliderNodes: [SCNNode]? { get set }
```

## Discussion

Discussion A particle system can perform limited collision detection and resolution with geometries in the scene. If a moving particle intersects a geometry attached to one of the SCNNode objects in this array, SceneKit resolves the collision, either by removing the particle from the scene or allowing it to bounce off or slide along the geometry’s surface. note: Collision detection is computationally intensive. For the best rendering performance, limit the number of collider nodes for each particle system, and use only simple geometries—represented by the SCNSphere, SCNPlane, and SCNFloor classes—as collision surfaces. This array is empty by default.

## See Also

### Simulating Physics for Particles

- [isAffectedByGravity](scenekit/scnparticlesystem/isaffectedbygravity.md)
- [isAffectedByPhysicsFields](scenekit/scnparticlesystem/isaffectedbyphysicsfields.md)
- [particleDiesOnCollision](scenekit/scnparticlesystem/particlediesoncollision.md)
- [acceleration](scenekit/scnparticlesystem/acceleration.md)
- [dampingFactor](scenekit/scnparticlesystem/dampingfactor.md)
- [particleMass](scenekit/scnparticlesystem/particlemass.md)
- [particleMassVariation](scenekit/scnparticlesystem/particlemassvariation.md)
- [particleCharge](scenekit/scnparticlesystem/particlecharge.md)
- [particleChargeVariation](scenekit/scnparticlesystem/particlechargevariation.md)
- [particleBounce](scenekit/scnparticlesystem/particlebounce.md)
- [particleBounceVariation](scenekit/scnparticlesystem/particlebouncevariation.md)
- [particleFriction](scenekit/scnparticlesystem/particlefriction.md)
- [particleFrictionVariation](scenekit/scnparticlesystem/particlefrictionvariation.md)