Joint.connectedBody 连接刚体

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	public Rigidbody otherBody;
	public void Awake() {
		hingeJoint.connectedBody = null;
		hingeJoint.connectedBody = otherBody;
	}
}

// Connects the joint to the world instead of another rigidbody
//连接这个关节到世界而不是另一个刚体
hingeJoint.connectedBody = null;

// Connects the joint to another body
//连接这个关节到另一个刚体
var otherBody : Rigidbody;
hingeJoint.connectedBody = otherBody;