Rigidbody.constraints

描述

控制该刚体的模拟自由度。

默认情况下，该属性设置为 RigidbodyConstraints.None - 允许沿所有轴旋转和移动。 在某些情况下，您可能需要限制 Rigidbody 只能沿某些轴移动或旋转， 例如在开发 2D 游戏时。可以使用按位 OR 运算符组合多个 约束。

Note that position constraints are applied in World space, and rotation constraints are applied in the inertia space (relative to 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;
    }
}