static void Init()
    {
#if UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX || UNITY_STANDALONE_LINUX
        SketchfabExporter window = (SketchfabExporter)EditorWindow.GetWindow(typeof(SketchfabExporter));
        window.titleContent.text = "Sketchfab";
        window.Show();
#else // and error dialog if not standalone
        EditorUtility.DisplayDialog("Error", "Your build target must be set to standalone", "Okay");
#endif
    }
    void export()
    {
        finished = false;
        Transform[] selection = Selection.GetTransforms(SelectionMode.Editable | SelectionMode.ExcludePrefab);
        if (selection.Length == 0)
        {
            EditorUtility.DisplayDialog("No source object selected!", "Please select one or more target objects", "Okay :(");
            return;
        }

        if (param_token.Trim().Length == 0)
        {
            EditorUtility.DisplayDialog("Invalid token!", "Your Sketchfab API Token identifies yourself to Sketchfab. You can get this token at https://sketchfab.com/dashboard.", "");
            return;
        }

        ArrayList meshList = new ArrayList();

        for (int i = 0; i < selection.Length; i++)
        {
            Component[] meshfilter = selection[i].GetComponentsInChildren(typeof(MeshFilter));
            for (int m = 0; m < meshfilter.Length; m++)
            {
                meshList.Add(meshfilter[m]);
            }

            Component[] skinnermeshrenderer = selection[i].GetComponentsInChildren(typeof(SkinnedMeshRenderer));
            for (int m = 0; m < skinnermeshrenderer.Length; m++)
            {
                meshList.Add(skinnermeshrenderer[m]);
            }
        }

        if (meshList.Count > 0)
        {
            exporter = new SketchfabExporter(param_token, meshList, param_title, param_description, param_tags, param_private, param_password);
            exporter.export();
        }
        else
        {
            EditorUtility.DisplayDialog("Objects not exported", "Make sure at least some of your selected objects have mesh filters!", "Okay :(");
        }
    }