Rigidbody.OnCollisionEnter(Collision)

描述

当此碰撞器/刚体开始接触另一个刚体/碰撞器时，将调用 OnCollisionEnter。

与 OnTriggerEnter 相反，OnCollisionEnter 传递的是 Collision 类，而不是 Collider。该 Collision 类包含有关接触点、冲击速度等的信息。如果您在函数中不使用 collisionInfo，请省略 collisionInfo 参数，因为这将避免不必要的计算。注意：只有当其中一个碰撞器还附加了非运动学刚体时，才会发送碰撞事件。碰撞事件将发送到禁用的 MonoBehaviour，以允许在响应碰撞时启用 MonoBehaviour。

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    AudioSource audioSource;

    void Start()
    {
        audioSource = GetComponent<AudioSource>();
    }

    void OnCollisionEnter(Collision collision)
    {
        // Debug-draw all contact points and normals
        foreach (ContactPoint contact in collision.contacts)
        {
            Debug.DrawRay(contact.point, contact.normal, Color.white);
        }

        // Play a sound if the colliding objects had a big impact.
        if (collision.relativeVelocity.magnitude > 2)
            audioSource.Play();
    }
}

另一个示例

// A grenade
// instantiates a explosion Prefab when hitting a surface
// then destroys itself
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public Transform explosionPrefab;
    void OnCollisionEnter(Collision collision)
    {
        ContactPoint contact = collision.contacts[0];

        // Rotate the object so that the y-axis faces along the normal of the surface
        Quaternion rot = Quaternion.FromToRotation(Vector3.up, contact.normal);
        Vector3 pos = contact.point;
        Instantiate(explosionPrefab, pos, rot);
        Destroy(gameObject);
    }
}