clampToGround KmlDataSource

[pengbao4386]

When the KML data is loaded, the clampToGround is set to true. But the line data can't be clamped to the ground。the clampToGround is not work?
var kmlDataSource = new Cesium.KmlDataSource();
var promise = kmlDataSource.load('../Apps/SampleData/kml/road.kmz',
{
camera: viewer.scene.camera,
canvas: viewer.scene.canvas,
clampToGround:true
});
viewer.dataSources.add(promise);

[ggetz]

Hi @pengbao4386

Cesium currently doesn't support polylines clamped to terrain, but we are in the process of working on them, see #2172.

Generally, please ask questions like this over at the Cesium Forum. There are members of the community and developers from the team who answer these kinds of questions there. Additionally, Cesium's a big project, so we use GitHub for feature requests and bug tracking exclusively. Thanks!