[racket] Crowdsourcing Pict3D's design

John Clements wrote on 03/11/2015 01:38 AM:
> Maybe simpler: why not just treat the mouse like a joystick? That is, 
> if you press the mouse down and move it a little to the right and hold 
> it there, the camera continues to move smoothly until you release.

Firefox "autoscroll" is one popular example of this. Middle-mouse-down 
on most parts of the page puts an indicator at pointer position on 
screen; then, until mouse-up, the direction and speed of the scrolling 
is relative to the direction and distance of pointer from this indicator.

https://support.mozilla.org/en-US/kb/advanced-panel-accessibility-browsing-network-upda#w_browsing

Neil V.