Re: Curved projections

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ROY RUDDLE (saprar++at++thor.cf.ac.uk)
Tue, 27 Jun 1995 16:22:35 +0100 (BST)

> I would like to render the scene onto a non-planar view/projection plane
> (which would probably be part of a sphere). This would be to compensate for
> curvature in some specialised wide field-of-view screens. The question is
> this an easy thing to do and what are the performance implications. If anyone
> can recommend a good book which deals specifically with 3D transformations in
> detail, I would be most interested in knowing about it.

For real time work (in the most general case) you've got a really big
problem. For example, straight lines will project to be curved, so all the
standard CG algorithms break down - drawing a straight line becomes more like
drawing a spline.

Sounds as though something like MJ's corrected projectors would do
the job for certain situations (eg. those common in simulators?)

roy

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