1. With BABYLON.ArcRotateCamera how can I allow the user to zoom in and out with keyboard keys or other software control?
I wrote some code which uses camera.setPosition to get some specific orthogonal camera angles but I am looking for something to offer the user who does not have mouse scroll wheel or multitouch capability.
2. Also, when using Chrome in Windows 7 and 10, the BABYLON.ArcRotateCamera behaviour seems to change when you switch away from the browser to some other program and later switch back. At this point the mouse act like free camera instead of BABYLON.ArcRotateCamera.