Path: utzoo!mnetor!uunet!husc6!think!ames!pasteur!ucbvax!aero4.larc.nasa.GOV!blbates
From: blbates@aero4.larc.nasa.GOV (Bates TAD/HRNAB ms294 x2601)
Newsgroups: comp.sys.sgi
Subject: Mouse driven rotations
Message-ID: <8803151257.AA08764@aero4.larc.nasa.gov>
Date: 15 Mar 88 12:57:55 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 12


     Personally, I prefere driving rotations based on the change in mouse
position.  I have used programs that use the absolute position, but most of
the time I don't like it.  However, there have been a few cases where absolute
positioning has been better.  If you want to return to a specific orientation
or if you want to limit the amount of movement.  I have a sample FORTRAN
source I can send you that reads in x,y,z coordinates and allows you to
rotate them about all 3-axes of rotation, translate, zoom, change
perspective, Gouraud shade sufaces with and with out Z-buffering.  It is
constantly in flux, as I try new and different things, but it will give you
a good start.  I will send it in my next message (almost 1000 lines).  If you
have any questions or suggestions for improvement let me know.