Collider.ClosestPointOnBounds

# [Collider](https://docs.unity3d.com/cn/2019.4/ScriptReference/Collider.html).ClosestPointOnBounds

public [Vector3](https://docs.unity3d.com/cn/2019.4/ScriptReference/Vector3.html) **ClosestPointOnBounds** ([Vector3](https://docs.unity3d.com/cn/2019.4/ScriptReference/Vector3.html) **position**);

## 描述

与附加碰撞体的包围盒最接近的点。

这可用于计算在施加爆炸伤害时的生命值。

```
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public float hitPoints = 100.0F;
    public Collider coll;
    void Start()
    {
        coll = GetComponent<Collider>();
    }

void ApplyHitPoints(Vector3 explosionPos, float radius)
    {
        // The distance from the explosion position to the surface of the collider.
        Vector3 closestPoint = coll.ClosestPointOnBounds(explosionPos);
        float distance = Vector3.Distance(closestPoint, explosionPos);

// The damage should decrease with distance from the explosion.
        float damage = 1.0F - Mathf.Clamp01(distance / radius);
        hitPoints -= damage * 10.0F;
    }
}
```