Unity處理材質球過期屬性工具

 Unity中的材質屬性被序列化以後，就會一直存儲在資源中，即使該屬性刪除後，它的序列化值以及引用關係也不會被丟掉，所以我們經常會發現，當我們使用一個和之前命名相同的屬性時，原來的屬性值或資源就會被自動賦值，這是因爲材質中一直保持這種關係；但是，有些時候我們爲了優化或者其它需求，想要去清理掉這些引用關係，如下，給出了清理某個文件夾下所有材質過期屬性的一個工具；

參考：遊戲資源工具（一）：Unity中處理材質球過期屬性工具

using UnityEngine;
using UnityEditor;

public class MatObseletePropertyWindow : EditorWindow
{
    public static string assetFolderPath = "Assets/Scenes";
    [MenuItem ("Tools/移除材質中的廢棄屬性")]
    public static void ShowWindow () {
        EditorWindow thisWindow = EditorWindow.GetWindow(typeof(MatObseletePropertyWindow));
        thisWindow.titleContent = new GUIContent("統計並移除材質中的無用屬性");
        thisWindow.position = new Rect(Screen.width/2, Screen.height/2, 600, 1000);
    }

    public static void ClearMatObseleteProperty()
    {
        Debug.Log(Application.dataPath);
        string projectPath = Application.dataPath.Replace("Assets", "");
        assetFolderPath = assetFolderPath.Replace(projectPath, "");
        var matList = AssetDatabase.FindAssets("t:Material", new[] {assetFolderPath});
 
        foreach(var i in matList)
        {
            // EditorUtility.DisplayProgressBar("材質屬性移除統計文件", "正在寫入統計文件中...", ix/shaderList.Length);
            var path = AssetDatabase.GUIDToAssetPath(i);
            Material mat = AssetDatabase.LoadAssetAtPath(path, typeof(Material)) as Material;
            Debug.Log(mat.name);
            SerializedObject so = new SerializedObject(mat);
            SerializedProperty m_SavedProperties = so.FindProperty("m_SavedProperties");
            RemoveElement(mat, "m_TexEnvs", m_SavedProperties);
            RemoveElement(mat, "m_Floats", m_SavedProperties);
            RemoveElement(mat, "m_Colors", m_SavedProperties);
            so.ApplyModifiedProperties();
        }
        AssetDatabase.SaveAssets();
        AssetDatabase.Refresh();
    }
    private static void RemoveElement(Material mat, string spName, SerializedProperty saveProperty){
        SerializedProperty property = saveProperty.FindPropertyRelative(spName);
            for(int i = property.arraySize - 1; i >= 0; i--){
                var prop = property.GetArrayElementAtIndex(i);
                string propertyName = prop.displayName;
                if (!mat.HasProperty(propertyName))
                {
                    property.DeleteArrayElementAtIndex(i);
                    Debug.Log("移除屬性名稱" + propertyName);
                }
            }
    }
    void OnGUI()
    {
        EditorGUILayout.BeginHorizontal();
        EditorGUILayout.LabelField("選擇文件夾");
        EditorGUILayout.TextField(assetFolderPath);
        if (GUILayout.Button("選擇"))
        {
            assetFolderPath = EditorUtility.OpenFolderPanel("選擇文件夾", assetFolderPath, "");
        }
        EditorGUILayout.EndHorizontal();
 
        if (GUILayout.Button("確定") && assetFolderPath != null)
        {
            ClearMatObseleteProperty();
        }
    }
}