通过代码配置模型rig面板上的avatar definition的source

以下是通过代码配置模型rig面板上的avatar definition的source的示例代码：

using UnityEngine;
using UnityEditor;

public class AvatarDefinitionSource : EditorWindow
{
    private GameObject model;
    private Avatar avatar;

    [MenuItem("Window/Avatar Definition Source")]
    static void Init()
    {
        AvatarDefinitionSource window = (AvatarDefinitionSource)EditorWindow.GetWindow(typeof(AvatarDefinitionSource));
        window.Show();
    }

    void OnGUI()
    {
        GUILayout.Label("Avatar Definition Source", EditorStyles.boldLabel);

        model = (GameObject)EditorGUILayout.ObjectField("Model", model, typeof(GameObject), true);

        if (GUILayout.Button("Create Avatar"))
        {
            avatar = AvatarBuilder.BuildGenericAvatar(model, "");
            avatar.name = model.name + "_Avatar";

            SerializedObject so = new SerializedObject(avatar);
            SerializedProperty sp = so.FindProperty("m_AvatarData.m_AvatarSkeleton.m_RootTransform");

            AvatarSetupTool.AutoSetupOnInstance(avatar, sp);

            Selection.activeObject = avatar;

            Debug.Log("Avatar created!");
        }

        if (GUILayout.Button("Set Avatar Definition Source"))
        {
            if (avatar == null)
            {
                Debug.LogError("Please create an avatar first.");
                return;
            }

            string path = AssetDatabase.GetAssetPath(model);
            ModelImporter modelImporter = AssetImporter.GetAtPath(path) as ModelImporter;

            if (modelImporter == null)
            {
                Debug.LogError("Invalid model path.");
                return;
            }

            modelImporter.animationType = ModelImporterAnimationType.Human;
            modelImporter.avatarSetup = ModelImporterAvatarSetup.NoAnimation;
            modelImporter.sourceAvatar = avatar;

            AssetDatabase.ImportAsset(path);

            Debug.Log("Avatar definition source set!");
        }
    }
}

这段代码创建了一个名为“Avatar Definition Source”的窗口，该窗口允许用户选择一个模型并创建一个Avatar，然后将其设置为模型的Avatar Definition Source。要使用此代码，请将其保存为.cs文件并将其放置在Unity项目的Editor文件夹中。然后，从Unity编辑器菜单中选择“Window”>“Avatar Definition Source”以打开窗口。在窗口中，选择要创建Avatar的模型并单击“Create Avatar”按钮。然后，单击“Set Avatar Definition Source”按钮可将Avatar设置为模型的Avatar Definition Source。