最近 QA 同学需要在某个 LODGroup 对象，当前显示的 LOD 是哪个级别的功能，所以上网搜索了一下，发现：Current LOD level - LOD Group Unity 也有人需求该功能，但是回答的人写得代码的不到想要的效果，所以自己重写了下面的代码

CSharp

//  2021/07/01
private static int GetLODCurShowLevel(Camera cam, LODGroup lodGroup)
{var inv_SceneViewCamHeight = 1.0f / (cam.pixelHeight - 6.0f);var lods = lodGroup.GetLODs();for (int lodIDX = 0; lodIDX < lods.Length; lodIDX++){var lod = lods[lodIDX];var renderers = lod.renderers;for (int renderIDX = 0; renderIDX < renderers.Length; renderIDX++){var renderer = renderers[renderIDX];var heightInScreen = cam.WorldToScreenPoint(renderer.bounds.min).y - cam.WorldToScreenPoint(renderer.bounds.max).y;var ratioInScren = heightInScreen * inv_SceneViewCamHeight;if (ratioInScren > lod.screenRelativeTransitionHeight){return lodIDX;}}}return -1;
}

第二种方法

// jave.lin 2021/07/02using UnityEngine;public class TestingStoreLODGroupCurLODLevel : MonoBehaviour
{public bool[] lodVisibleArr;public int GetCurLOD(){if (lodVisibleArr != null){var len = lodVisibleArr.Length;for (int i = 0; i < len; i++){if (lodVisibleArr[i]){return i;}}}return -1;}
}// jave.lin 2021/07/02using UnityEngine;public class TestingCheckVisibleChanged : MonoBehaviour
{public int belongLOD;public TestingStoreLODGroupCurLODLevel storeLOD;private void OnBecameInvisible(){if (storeLOD){storeLOD.lodVisibleArr[belongLOD] = false;}}private void OnBecameVisible(){if (storeLOD){storeLOD.lodVisibleArr[belongLOD] = true;}}
}private void SetupCheckLODInfo(GameObject go){var lodGroup = go.GetComponent<LODGroup>();if (lodGroup == null){return;}var storeLODComp = go.GetComponent<TestingStoreLODGroupCurLODLevel>();if (storeLODComp != null){// 设置过return;}storeLODComp = go.AddComponent<TestingStoreLODGroupCurLODLevel>();var lods = lodGroup.GetLODs();for (int lodIDX = 0; lodIDX < lods.Length; lodIDX++){var lod = lods[lodIDX];var renderers = lod.renderers;for (int rendererIDX = 0; rendererIDX < renderers.Length; rendererIDX++){var renderer = renderers[rendererIDX];var checkVisibleComp = renderer.gameObject.GetComponent<TestingCheckVisibleChanged>();if (checkVisibleComp == null){checkVisibleComp = renderer.gameObject.AddComponent<TestingCheckVisibleChanged>();}checkVisibleComp.belongLOD = lodIDX;checkVisibleComp.storeLOD = storeLODComp;}}storeLODComp.lodVisibleArr = new bool[lods.Length]; }private void UnSetupCheckLODInfo(GameObject go){var lodGroup = go.GetComponent<LODGroup>();if (lodGroup == null){return;}var storeLODComp = go.GetComponent<TestingStoreLODGroupCurLODLevel>();if (storeLODComp != null){GameObject.Destroy(storeLODComp);}var lods = lodGroup.GetLODs();for (int lodIDX = 0; lodIDX < lods.Length; lodIDX++){var lod = lods[lodIDX];var renderers = lod.renderers;for (int rendererIDX = 0; rendererIDX < renderers.Length; rendererIDX++){var renderer = renderers[rendererIDX];var checkVisibleComp = renderer.gameObject.GetComponent<TestingCheckVisibleChanged>();if (checkVisibleComp != null){GameObject.Destroy(checkVisibleComp);}}}}

References

Current LOD level - LOD Group Unity - 我也刚刚注册账号上去提交回复上面的代码

Unity - 搬砖日志 - 获取 LODGroup 当前显示的 LOD 级别相关推荐

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Unity - 搬砖日志 - 获取 LODGroup 当前显示的 LOD 级别

CSharp

第二种方法

References

Unity - 搬砖日志 - 获取 LODGroup 当前显示的 LOD 级别相关推荐

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