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;
    }
}