40 lines
1.1 KiB
C#
Executable File
40 lines
1.1 KiB
C#
Executable File
using UnityEngine;
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using System.Collections;
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public class ViewFrustrumTrigger : MonoBehaviour {
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public Camera Camera;
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public delegate void ViewFrustrumEventHandler();
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public event ViewFrustrumEventHandler EnterView;
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public event ViewFrustrumEventHandler LeaveView;
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private bool visible = false;
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void Update () {
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Bounds bounds;
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var renderer = GetComponentInChildren<Renderer>();
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if (renderer) {
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bounds = renderer.bounds;
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} else {
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return;
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}
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if (visible && !IsVisibleFrom(bounds, Camera)) {
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if (LeaveView != null) {
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LeaveView();
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}
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visible = false;
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} else if (!visible && IsVisibleFrom(bounds, Camera)) {
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if (EnterView != null) {
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EnterView();
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}
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visible = true;
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}
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}
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static bool IsVisibleFrom(Bounds bounds, Camera camera) {
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Plane[] planes = GeometryUtility.CalculateFrustumPlanes(camera);
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return GeometryUtility.TestPlanesAABB(planes, bounds);
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}
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}
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