>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.
Megan Gentry
Former RT-11 Developer
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| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
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Received on Mon Jul 16 2001 - 17:27:28 BST