Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!uakari.primate.wisc.edu!aplcen!haven!mimsy!mojo!russotto From: russotto@eng.umd.edu (Matthew T. Russotto) Newsgroups: comp.sys.mac.system Subject: Re: The Mouse -- What is its History? Message-ID: <1990Oct9.022834.17078@eng.umd.edu> Date: 9 Oct 90 02:28:34 GMT References: <10592@goofy.Apple.COM> <30767@netnews.upenn.edu> Sender: news@eng.umd.edu (The News System) Organization: College of Engineering, Maryversity of Uniland, College Park Lines: 24 In article <30767@netnews.upenn.edu> jeffe@eniac.seas.upenn.edu (George Jefferson ) writes: > > I should also note that the optical mice developed at PARC, like > mechanical mice, sense mouse-relative motion, not mouse-pad relative > motion. Those of you suffering with Sun optical mice will understand > and appreciate the difference. > > >Till now I never quite undestood why my Sun mouse is so awkward to >use. I asumed that 'pad relative' motion was an unavoidable >problem with optical mice. > >Which type of relative motion is employed by the A+ mouse? Within maybe 10 degrees of vertical, it works fine. After that it only works in one direction-- i.e. if you turn the mouse pad 90 degrees going vertical still works, going horizontal it has no effect. I think the true mouse-relative ones use a pad with a hexagonal grid. -- Matthew T. Russotto russotto@eng.umd.edu russotto@wam.umd.edu .sig under construction, like the rest of this campus.