Hi!
Is ist possible to read the current position of the camera (long, lat, height) and the HeadingPitchRoll value of the actual view perspective and print it e.g. into the console?
Most of these properties are accessible on the camera class, including getting the view rectangle that the camera is currently looking at:
https://cesiumjs.org/Cesium/Build/Documentation/Camera.html?classFilter=Camera#computeViewRectangle
This thread also has a Sandcastle example of saving and loading the camera position by getting its Cartesian3 position that might be helpful too as a reference:
https://groups.google.com/d/msg/cesium-dev/0WzcOeKwe_c/zcMG0lxaFQAJ
Let me know if you find what you need!