unity立方体和球体相交

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using UnityEngine;

public class CubeShphereAABB : MonoBehaviour
{

    public Transform cube;
    public Transform sphere;


    public Vector3 cubeMin;
    public Vector3 cubeMax;

    public Vector3 sphereCenter;
    public float sphereRadius;


    [ContextMenu("A")]
    public void Awake()
    {

        var center = cube.position;
        var size = cube.localScale;
        var xo = size.x / 2;
        var yo = size.y / 2;
        var zo = size.z / 2;

        cubeMin.x = center.x - xo;
        cubeMin.y = center.y - yo;
        cubeMin.z = center.z - zo;

        cubeMax.x = center.x + xo;
        cubeMax.y = center.y + yo;
        cubeMax.z = center.z + zo;

        sphereRadius = sphere.localScale.x / 2;

    }

    void Update()
    {
        bool collider = AABB();
        sphere.GetComponent<MeshRenderer>().material.color = collider ? Color.red : Color.green;
        Debug.LogError(collider);
    }


    public bool AABB()
    {
        sphereCenter = sphere.position;

        Vector3 point = sphereCenter;

        point.x = point.x > cubeMax.x ? cubeMax.x : point.x;
        point.x = point.x < cubeMin.x ? cubeMin.x : point.x;

        point.y = point.y > cubeMax.y ? cubeMax.y : point.y;
        point.y = point.y < cubeMin.y ? cubeMin.y : point.y;

        point.z = point.z > cubeMax.z ? cubeMax.z : point.z;
        point.z = point.z < cubeMin.z ? cubeMin.z : point.z;

        var dis = Vector3.Distance(point, sphereCenter);

        return dis <= sphereRadius;
    }


}