Rigidbody.constraints

描述

控制此刚体模拟允许的自由度。

默认情况下，此设置为RigidbodyConstraints.None，允许绕所有轴旋转和平移。在某些情况下，您可能希望将Rigidbody约束为仅沿某些轴移动或旋转，例如在开发 2D 游戏时。您可以使用按位或运算符组合多个约束。

请注意，位置约束在世界空间中应用，旋转约束在惯性空间中应用（相对于Rigidbody.inertiaTensorRotation）。

//Attach this script to a GameObject.
//Attach a Rigidbody to the GameObject by clicking the GameObject in the Hierarchy and
//clicking the Add Component button. Search for Rigidbody in the field and select
//it when shown.

using UnityEngine;

public class Example : MonoBehaviour
{
    Rigidbody m_Rigidbody;

    void Start()
    {
        m_Rigidbody = GetComponent<Rigidbody>();
        //This locks the RigidBody so that it does not move or rotate in the Z axis.
        m_Rigidbody.constraints = RigidbodyConstraints.FreezePositionZ | RigidbodyConstraints.FreezeRotationZ;
    }
}