RE: [Visualpython-users] Patch for limiting zoom in vpython

[David S. <dsc...@cm...>]

> I agree that control of manual_scale doesn't sound like a good idea. Since
> the standard Visual interface includes rotation around the center of the
> scene, would it make sense just to give minimum and maximum distances for
> the camera from the center?

Definitely not!  To make any sense of the camera position you need to know
horrible things like the field of view angle and the aspect ratio of the
window, not to mention some trig.  Normally you control scale with
scene.range, right?

sphere(radius = 50)
scene.range = 50

> I'm not sure I understand what the
> significance
> would be of minimum and maximum ranges, which sound like cubes or boxes to
> me.

These would place limits on how small or large the *effective* scene.range
could get in response to manual control.

Dave