cesium监听23D切换

const mode3d = () => {
	//监听23D切换
	//3D
	viewer.sceneModePicker.viewModel.morphTo3D.afterExecute.addEventListener(() => {
		mode.value = viewer.sceneModePicker.viewModel.sceneMode
	});
	//2D
	viewer.sceneModePicker.viewModel.morphTo2D.afterExecute.addEventListener(() => {
		mode.value = viewer.sceneModePicker.viewModel.sceneMode
	});
	//哥伦比亚视图 2.5D
	viewer.sceneModePicker.viewModel.morphToColumbusView.afterExecute.addEventListener(() => {
		mode.value = 2.5
	});

}