Light Pens ...

From: John Foust <jfoust_at_threedee.com>
Date: Tue Jul 17 08:55:17 2001

At 06:27 PM 7/16/01 -0400, Megan wrote:

>>Ok, my mind is still blown. How does a light-pen drawing program work
>>then? (Or is a light-pen drawing program not possible?)
>
>By putting up some sort of target which does provide the light-pen
>with a light signal. The target is designed in such a way that you
>cannot move the pen without hitting some part of it, and the software
>sees a light-pen hit and *re-centers* the target on that point,
>effectively moving it to where the pen is now pointing.

I think the technical term for that is a "cursor". :-)

- John
Received on Tue Jul 17 2001 - 08:55:17 BST