var _wt = null;//路径漫游

//初始化路径漫游
function initWalkThrough() {
    var config = new Glodon.Bimface.Plugins.Walkthrough.WalkthroughConfig();
    config.viewer = _viewer;
    config.stopCallback = stopWalkThroughCallBack;
    _wt = new Glodon.Bimface.Plugins.Walkthrough.Walkthrough(config);
    _wt.setKeyFrameCallback(keyFrameCallBack);
}

//路径漫游停止回调函数
function stopWalkThroughCallBack() {
    callbackObj.walkThroughStoped();
}

//播放回调帧
function keyFrameCallBack(index) {
    callbackObj.keyFrameCallBack(JSON.stringify(index));
}

//添加关键帧（返回关键帧）
function addKeyFrame() {
    if (_wt == null)
        initWalkThrough();
    var keyFrame = _wt.addKeyFrame();
    //return keyFrame;//后台接收为dynamic类型 ExpandoObject
    return JSON.stringify(keyFrame);
}

//清除关键帧
function clearKeyFrames() {
    if (_wt == null)
        return;
    _wt.clearKeyFrames();
}

//获取所有关键帧
function getKeyFrames() {
    if (_wt == null)
        return null;
    var allKeyFrames = _wt.getKeyFrames();
    return JSON.stringify(allKeyFrames);
}

//暂停路径漫游
function pauseWalkThrough() {
    if (_wt == null)
        return;
    _wt.pause();
}

//开始路径漫游
function playWalkThrough(id) {
    if (_wt == null)
        return;
    _wt.play(id);
}

//移除关键帧
function removeKeyFrame(index) {
    if (_wt == null)
        return;
    _wt.removeKeyFrame(index);
}

//设置关键帧列表
function setKeyFrames(list) {
    if (_wt == null)
        initWalkThrough();
    _wt.setKeyFrames(list);
}

//设置路径漫游时间
function setWalkthroughTime(time) {
    if (_wt == null)
        initWalkThrough();
    _wt.setWalkthroughTime(time);
}

//开始路径漫游并设置漫游时间
function playWalkThroughWithTime(time, id) {
    setWalkthroughTime(time);
    playWalkThrough(id);
}