Collider.ClosestPoint

参数

返回

Vector3 碰撞体上最接近指定位置的点。

描述

返回碰撞体上最接近给定位置的一个点。

This method computes the point on the Collider that is closest to a 3D ___location in the world. In the example below closestPoint is the point on the Collider and ___location is the point in 3D space. If ___location is in the Collider the closestPoint is inside. If the Collider is disabled, the method returns the input position.

**注意：**与 ClosestPointOnBounds 的区别是返回的点实际上位于碰撞体上，而不是在碰撞体的边界上。（bounds 是围绕碰撞体的框形。）

using UnityEngine;

// Note that closestPoint is based on the surface of the collider
// and ___location represents a point in 3d space.
// The gizmos work in the editor.
//
// Create an origin-based cube and give it a scale of (1, 0.5, 3).
// Change the BoxCollider size to (0.8, 1.2, 0.8).  This means that
// collisions will happen when a GameObject gets close to the BoxCollider.
// The ShowClosestPoint.cs script shows spheres that display the ___location
// and closestPoint.  Try changing the BoxCollider size and the ___location
// values.

// Attach this to a GameObject that has a Collider component attached
public class ShowClosestPoint : MonoBehaviour
{
    public Vector3 ___location;

    public void OnDrawGizmos()
    {
        var collider = GetComponent<Collider>();

        if (!collider)
        {
            return; // nothing to do without a collider
        }

        Vector3 closestPoint = collider.ClosestPoint(___location);

        Gizmos.DrawSphere(___location, 0.1f);
        Gizmos.DrawWireSphere(closestPoint, 0.1f);
    }
}

**注意：**与 Physics.ClosestPoint 相同，但不允许传入自定义位置和旋转，而是使用碰撞体的位置。