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环境

Unity : 2020.3.37f1
Pipeline : BRP

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原因

(好久没搬砖了，偶尔健身一下，顺便将这些无技术含量的内容，记到 blog，不要记在脑子)

最近给项目做优化的过程中
发现 BRP 管线下的 Shadow Resolution 只能在 Project Settings/Quality/Shadow Resolution 去设置
而且发现
Shadow Resolution 的一些枚举为：

• Low Resolution - 1K
• Medium Resolution - 2K
• High Resolution - 4K
• Very High Resolution - 4K (这个可能因硬件不同而不同)

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解决

但是如果想要设置更小的 shadow resolution 的话，这步就没辙了？
还好我去公司中台请教了 TA 专家，他说 BRP 中一样是可以设置的

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CSharp 脚本

// jave.lin 2023/03/06 custom shadow resolution
// refer to : https://docs.unity3d.com/Manual/shadow-mapping.htmlusing UnityEngine;public enum eCustomShadowResolution
{UsingQualitySettings = 0,Low = 128,Medium = 256,High = 512,VeryHigh = 1024,
}[ExecuteInEditMode]
public class LightCustomShadowResolution : MonoBehaviour
{public bool runInUpdate = true;public eCustomShadowResolution shadowSize = eCustomShadowResolution.High;private Light lightComp;private void Update(){if (runInUpdate){if (lightComp == null){lightComp = GetComponent<Light>();}if (lightComp == null){return;}lightComp.shadowCustomResolution = (int)shadowSize;}}
}

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效果预览 - Light.shadowCustomResolution

Light.shadowCustomResolution = val

• 这个 val 不等于 0 的话，就是自定义设置，这个 val 会自动 mostest NPOT == Mostest Next Power Of Tow
• 这个 val 等于 0 的话，就是使用 Quality Settings 的全局配置
  

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效果预览 - Using Quality Settings

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应用

只需要编写工具，批量对项目中的 Scene、Prefab，遍历其下所有 Light 的 GameObject 添加 改组件即可

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ControlLightShadowResolution.cs Component

// jave.lin 2023/03/06 control light shadow resolution, [attach to light]using UnityEditor.SearchService;
using UnityEngine;
using War.Script;[ExecuteInEditMode]
public class ControlLightShadowResolution : MonoBehaviour
{public eLightShadowResolutionFollowQualitySetting followQualitySetting;public int shadowSize;#if UNITY_EDITORpublic bool runInUpdate = true;
#endifprivate Light lightComp;private void Start(){int level = UIInterface.GetCsharpEventCenterLevel();OnQualityLevelChanged(level);// TODO: xxx 修改为对应的时间名EventMgr.Instance.RemoveEvent<int>("xxx", OnQualityLevelChanged);EventMgr.Instance.AddEvent<int>("xxx", OnQualityLevelChanged);}private void OnDestroy(){// TODO: xxx 修改为对应的时间名EventMgr.Instance.RemoveEvent<int>("xxx", OnQualityLevelChanged);}#if UNITY_EDITORprivate void Update(){if (runInUpdate){ApplyChanged();}}
#endifprivate void OnQualityLevelChanged(int lv){if (followQualitySetting == eLightShadowResolutionFollowQualitySetting.On){shadowSize = 0;}else{eQualityLevel level = (eQualityLevel)lv;switch (level){case eQualityLevel.VeryLow:shadowSize = (int)eLightCustomShadowResolutionSize.VeryLow;break;case eQualityLevel.Low:shadowSize = (int)eLightCustomShadowResolutionSize.Low;break;case eQualityLevel.Medium:shadowSize = (int)eLightCustomShadowResolutionSize.Medium;break;case eQualityLevel.High:shadowSize = (int)eLightCustomShadowResolutionSize.High;break;default:break;}}ApplyChanged();}private void ApplyChanged(){if (lightComp == null){lightComp = GetComponent<Light>();}if (lightComp == null){return;}lightComp.shadowCustomResolution = shadowSize;}
}

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Tools Batching add the Component to all Light

// 伪代码
var scene = EditorSceneManager.xxxByPath("xxx");
var roots = scene.GetxxxxRoots();
foreach (var root in roots)
{var lights = root.GetComponents<Light>();// 剩下的同下代码
}

    public static void AddControlLightShadowResolution(){var lights = GameObject.FindObjectsOfType<Light>();foreach (var light in lights){if (light == null)continue;ControlLightShadowResolution comp = light.transform.GetComponent<ControlLightShadowResolution>();if (light.lightmapBakeType == LightmapBakeType.Realtime){if (comp == null){light.gameObject.AddComponent<ControlDepthMode>();}}else{if (comp != null){if (Application.isPlaying)GameObject.Destroy(comp);elseGameObject.DestroyImmediate(comp);}}}}

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References

• shadow-mapping - unity 官方 shadow map 文档