Variable specification

I started to learn more, but I was a little confused about some of the variables, like:

PositionWC
PositionCV
positionEC

Can you help me?

This also took me a while to get used to. I believe these are:

WC = World Coordinate

CV = Columbus View (that’s the 2.5D view you can toggle in the Cesium Viewer)

EC = Eye Coordinate

You might find this a helpful reading if you’re not familiar with transformation matrices in the context of computer graphics:

www.opengl-tutorial.org/beginners-tutorials/tutorial-3-matrices/#the-model-view-and-projection-matrices

Thank you very much. My problem has been solved!