Angus Dorbie (dorbie++at++sgi.com)
Thu, 23 Sep 1999 09:39:20 -0700
There's no minimum as such.
There are many variables and the position of the viewer and projector
are critical. The closer these are the less distortion is required.
On a dome you'll pretty much always need distortion correction because
the errors only diminish enough for impractically small channels. The
distortion correction may be possible in the projectors.
If you need distortion correction in the I.G. I have written a Performer
sample which works for any spherical dome, projector position and design
eyepoint. Plug in the parameters and it computes the correction mesh
then performs the correction in callbacks.
CHeers,Angus.
--
"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 23 1999 - 09:39:27 PDT