Unity 预设Lightmap信息丢失 使用ScriptableObject保存Lightmap信息动态赋值

以下代码都是手敲完成，不是源工程中复制的，如有错误请下载源工程查看

动态加载预设或者修改预设信息时  预设Lightmap信息丢失，需要将预设Lightmap信息保存起来，加载完成后动态赋值一次。

选择了使用ScriptableObject进行数据保存。

先创建ScriptableObject类（Lightmap和对象关联字段去掉了）。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[CreateAssetMenu(menuName = "Data/ScripttableTest")]
public class ScripttableTest : ScriptableObject
{
    public List lightmapInfos = new List();
}

[System.Serializable]
public class LightmapInfo
{
    public int lightmapIndex;
    public Vector4 lightmapScaleOffset;
}

然后Creat一个ScriptableObject资源

接下来是信息记录部分，依然在编辑器下完成：

首先获取需要保存的对象，保存Lightmap信息：

        GameObject[] gameObjects = Selection.gameObjects;

        if (gameObjects != null && gameObjects.Length > 0)
        {
            int lenght = gameObjects.Length;
            GameObject go;
            Renderer renderer;
            for (int i = 0; i < lenght; i++)
            {
                go = gameObjects[i];

                renderer = go .GetComponent();
                lightmapData.lightmapIndex = renderer.lightmapIndex;
                lightmapData.lightmapScaleOffset = renderer.lightmapScaleOffset;
            }
        }

或者不打开场景，去场景固定对象下遍历，保存方法入上：

        GameObject[] gameObjects = Selection.gameObjects;

        UnityEngine.Object[] selectObjects = Selection.GetFiltered(typeof(UnityEngine.Object), SelectionMode.DeepAssets);
        if (selectObjects != null && selectObjects.Length != 0)
        {
            string assetPath;
            UnityEngine.Object asset = null;
            GameObject saveNode = null;

            bool needSave = false;
            for (int i = 0; i < selectObjects.Length; ++i)
            {
                needSave = false;
                assetPath = AssetDatabase.GetAssetPath(selectObjects[i]);

                foreach (string extName in assetType)
                {
                    if (assetPath.EndsWith(extName))
                    {
                        needSave = true;
                        break;
                    }
                }

                if (!needSave)
                    continue;

                asset = AssetDatabase.LoadAssetAtPath(assetPath, typeof(UnityEngine.Object)) as UnityEngine.Object;

                EditorSceneManager.OpenScene(assetPath);
                saveNode = GameObject.Find("RootPoint");

                if (saveNode == null)
                {
                    Debug.LogError("场景没有RootPoint节点！！");
                    continue;
                }


                EditorApplication.SaveScene();

                Debug.Log(string.Format("场景{0}的光照贴图信息保存完成", asset.name));
            }
            AssetDatabase.SaveAssets();
        }

接下来就是动态赋值，在预设加载完成后，获取所有Renderer进行赋值，赋值前后对比：