I would like the camera to keep tracking one of my entities by setting viewer.trackedEntity .
The problem is that in order to control the camera position when I start tracking my entity ,
I need to set entity.viewFrom .
viewFrom expects a Cartesian3 in East-North-Up coordinates relative to my entity’s position.
What I could not figure out is :
Given my former camera position and my entity’s position, how do I calculate viewFrom so
I could keep my former camera position after setting viewer.trackedEntity ?
Reference to a former topic I read on the subject: