I wonder what is the best way to set the camera direction in a Cesium
Viewer, if a heading, tilt & roll values are given, in degrees? sample
values are like:
which would be an orientation towards 102.7 degrees, looking a bit up
(90 degrees would be 'level') and rolling 1 degrees to the right.
I see that the Camera object has direction up and right values, which
are Cartesian3 in type, but it is not obvious for me on how to set
them, after having looked at the Camera Tutorial, Camera Sandcastle
demo, reference documentation, etc.