Rigidbody.angularVelocity

Description

The angular velocity vector of the rigidbody measured in radians per second.

In most cases you should not modify it directly, as this can result in unrealistic behaviour.

// Change the material depending on the speed of rotation
var fastWheelMaterial : Material;
var slowWheelMaterial : Material;

var rb: Rigidbody;
var rend: MeshRenderer;

function Start() {
	rb = GetComponent.<Rigidbody>();
	rend = GetComponent.<MeshRenderer>();
}


function Update () {
	if (rb.angularVelocity.magnitude < 5) {
		rend.sharedMaterial = slowWheelMaterial;
	}
	else {
		rend.sharedMaterial = fastWheelMaterial;	
	}
}

// Change the material depending on the speed of rotation
using UnityEngine;

public class ExampleClass : MonoBehaviour {

	public Material fastWheelMaterial;
	public Material slowWheelMaterial;
	public Rigidbody rb;
	public MeshRenderer rend;

	void Start()
	{
		rb = GetComponent<Rigidbody>();
		rend = GetComponent<MeshRenderer>();
	}
	
	void Update()
	{

		if (rb.angularVelocity.magnitude < 5)
			rend.sharedMaterial = slowWheelMaterial;
		else
			rend.sharedMaterial = fastWheelMaterial;			
	}
}