Collider.OnTriggerEnter(Collider)

参数

描述

GameObject 与另一个 GameObject 碰撞时，Unity 会调用 OnTriggerEnter。

当两个 GameObjects 碰撞时，OnTriggerEnter 会在 FixedUpdate 函数上发生。涉及的碰撞体并不始终在初始接触点处。

**注意：**两个 GameObjects 都必须包含 Collider 组件。其中一个必须启用 Collider.isTrigger，并包含 Rigidbody。如果两个 GameObjects 都启用了 Collider.isTrigger，则不会发生碰撞。如果两个 GameObjects 都没有 Rigidbody 组件，情况同样如此。

To use the following code sample, create a primitive GameObject, and attach a Collider and Rigidbody component to it. Enable Collider.isTrigger and Rigidbody.isKinematic. This GameObject will travel forward, until it collides with another GameObject. When a collision occurs, the direction immediately reverses.

using UnityEngine;

public class Example : MonoBehaviour
{
    private float speed = 2f;

    //Moves this GameObject 2 units a second in the forward direction
    void Update()
    {
        transform.Translate(Vector3.forward * Time.deltaTime * speed);
    }

    //Upon collision with another GameObject, this GameObject will reverse direction
    private void OnTriggerEnter(Collider other)
    {
        speed = speed * -1;
    }
}