Commands
            For now, the commands to interact with the tree are:
            
                - Enter: show or hide tree
 
                - Right Arrow or drag: turn counter-clockwise
 
                - Left Arrow or drag: turn clockwise
 
                - Plus or scroll: Zoom in
 
                - Minus or scroll: Zoom out
 
                - Down Arrow: tilt camera
 
                - Up Arrow: tilt camera
 
                - W: toggle wireframe (mesh triangles)
 
                - S: toggle strands (threads)
 
                - G: toggle branch graph (skeleton)
 
                - C: toggle contours
 
                - Space: generate a new tree
 
                - A: enable animation