Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83; site hou5f.UUCP 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