GitHub repo

vertical drag to move forward
dolly to cursor
rotate theta 45deg rotate theta -90deg rotate theta 360deg rotate phi 20deg
truck( 1, 0 ) truck( 0, 1 ) truck( -1, -1 )
zoom `camera.zoom / 2` zoom `- camera.zoom / 2`
move to( 3, 5, 2 ) fit to the bounding box of the mesh reset