剔除物距

以下示例说明如何使用 CullingGroups 根据距离参考点获取通知。

为简洁起见，此脚本已经过简化，并使用了几种性能较高的方法。

using UnityEngine;
using System.Linq;

public class CullingGroupBehaviour : MonoBehaviour
{
    CullingGroup localCullingGroup;

    MeshRenderer[] meshRenderers;
    Transform[] meshTransforms;
    BoundingSphere[] cullingPoints;

    void OnEnable()
    {
        localCullingGroup = new CullingGroup();

        meshRenderers = FindObjectsOfType<MeshRenderer>()
                .Where((MeshRenderer m) => m.gameObject != this.gameObject)
                .ToArray();

        cullingPoints = new BoundingSphere[meshRenderers.Length];
        meshTransforms = new Transform[meshRenderers.Length];

        for (var i = 0; i < meshRenderers.Length; i++)
        {
            meshTransforms[i] = meshRenderers[i].GetComponent<Transform>();
            cullingPoints[i].position = meshTransforms[i].position;
            cullingPoints[i].radius = 4f;
        }

        localCullingGroup.onStateChanged = CullingEvent;
        localCullingGroup.SetBoundingSpheres(cullingPoints);
        localCullingGroup.SetBoundingDistances(new float[] { 0f, 5f });
        localCullingGroup.SetDistanceReferencePoint(GetComponent<Transform>().position);
        localCullingGroup.targetCamera = Camera.main;
    }

    void FixedUpdate()
    {
        localCullingGroup.SetDistanceReferencePoint(GetComponent<Transform>().position);
        for (var i = 0; i < meshTransforms.Length; i++)
        {
            cullingPoints[i].position = meshTransforms[i].position;
        }
    }

    void CullingEvent(CullingGroupEvent sphere)
    {
        Color newColor = Color.red;
        if (sphere.currentDistance == 1) newColor = Color.blue;
        if (sphere.currentDistance == 2) newColor = Color.white;
        meshRenderers[sphere.index].material.color = newColor;
    }

    void OnDisable()
    {
        localCullingGroup.Dispose();
    }
}

将脚本添加到 GameObject（在本例中为多维数据集）并点击 Play。场景中的每个其他 GameObject 都会根据它们与参考点的距离来改变颜色。

http://i.stack.imgur.com/iRzgK.gif