GeometryUtility.TestPlanesAABB

描述

如果边界位于该平面数组内，则返回 true。

如果包围盒位于这些平面内，或者与其中任何平面相交，则将返回 true。

The TestPlanesAABB function uses the Plane array to test whether a bounding box is in the frustum or not.
You can use this function with CalculateFrustrumPlanes to test whether a camera's view contains an object regardless of whether it is rendered or not.
The test is conservative and can give false positive results. A bounding box can intersect the planes outside of the frustum because the planes are infinite and extend beyond the frustum volume. A typical false positive result is produced by a big bounding box near the frustum edge or corner.

另请参阅：GeometryUtility.CalculateFrustumPlanes。

using UnityEngine;

public class Example : MonoBehaviour
{
    // Detects manually if obj is being seen by the main camera

    GameObject obj;
    Collider objCollider;

    Camera cam;
    Plane[] planes;

    void Start()
    {
        cam = Camera.main;
        planes = GeometryUtility.CalculateFrustumPlanes(cam);
        objCollider =  GetComponent<Collider>();
    }

    void Update()
    {
        if (GeometryUtility.TestPlanesAABB(planes, objCollider.bounds))
        {
            Debug.Log(obj.name + " has been detected!");
        }
        else
        {
            Debug.Log("Nothing has been detected");
        }
    }
}