Angus Dorbie (dorbie++at++sgi.com)
Thu, 16 Sep 1999 11:46:16 -0700
> So if the middle of the room is nominally 0,0 and the wall therefore is
> from say -2.0m to 2.0m and is 2.0m away from the center (ie a 4 m screen
> subtending 90 degrees) and say the viewer has walked to 1.0, 0.5 in this
> room. The distance to screen is 1.5m. The relative position of left and
> right is -2.0-1.0 = 3.0 and 2.0-1.0 = 1.0, You divide by distance to
> screen to give left = 2.0, right = 0.6667 at a nominal near clip of
> zero. You then scale it all be whatever your near clip value should be.
Yikes, I mean a nominal near clip of one!!
--
"One of the best-known folk theorems of software engineering is that
60% to 75% of conventional software projects are either never
completed or rejected by their intended users. If that range is
anywhere near true (and I've never met a manager of any experience
who disputes it) then more projects than not are being aimed at goals
which are either (a) not realistically attainable, or (b) just plain
wrong."
Eric S. Raymond - The Cathedral and The Bazaar
For advanced 3D graphics Performer + OpenGL based examples and tutors:
http://www.dorbie.com/
This archive was generated by hypermail 2.0b2 on Thu Sep 16 1999 - 11:46:21 PDT