Rigidbody.inertiaTensor

Description

The diagonal inertia tensor of mass relative to the center of mass.

The inertia tensor is rotated by the inertiaTensorRotation. If you don't set intertia tensor from a script it will be calculated automatically from all colliders attached to the rigidbody.

// Expose tensor of inertia to allow adjustment from
// the inspector.
var tensor: Vector3;
var rb: Rigidbody;

function Start() {
	rb = GetComponent.<Rigidbody>();
	rb.inertiaTensor = tensor;
}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public Vector3 tensor;
    public Rigidbody rb;
    void Start() {
        rb = GetComponent<Rigidbody>();
        rb.inertiaTensor = tensor;
    }
}