          //与界面UI绑定
            var toolbar = document.getElementById('toolbar');
            Cesium.knockout.applyBindings(viewModel, toolbar);

            function subscribeParameter(name) {
                Cesium.knockout.getObservable(viewModel, name).subscribe(
                    function(newValue) {
                        if (name === 'pitch') {
                            //animation.offsetZ = newValue;
                            //animation.pitch = Cesium.Math.toRadians(parseInt(newVal