Does Cesium have a measure tool like STK 2D?

STK-systems tool kit has a ruler you select and then you click and drag to measure the distance to and from. Can something like this be added to Cesium?

We don’t have a GUI built in for measuring, but the API does have the ability to compute geodesic distances given two points: It should be easy to implement a basic measurement tool using it in your own app. The Picking example is a good place to start if you need to know how to get current ground position of the cursor.