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Path: utzoo!linus!philabs!cmcl2!floyd!vax135!ariel!hou5f!pgf
From: pgf@hou5f.UUCP
Newsgroups: net.micro
Subject: Re: Light Pens vs. Mouse
Message-ID: <320@hou5f.UUCP>
Date: Thu, 30-Jun-83 09:45:09 EDT
Article-I.D.: hou5f.320
Posted: Thu Jun 30 09:45:09 1983
Date-Received: Fri, 1-Jul-83 11:31:44 EDT
References: <456@houxm.UUCP>
Organization: American Bell ED&D, Holmdel, NJ
Lines: 9

Correct me if I'm wrong, but I thought one of the big limitations of the
light pen was that it can only point to a bright spot on the phosphor,
not a dark spot.  That is, without a cursor under the pen, you can only
point to objects already there, and can't point to arbitrary locations
without doing a "select" operation that flashes the whole screen.  Of 
course, if you add a cursor, you can track it, but probably only slowly,
since you have to "drag" it around the screen with you.
					Paul Fox ABI HO
					ihnp4!hou5f!pgf