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Wrong forum so far, no binary attachment detected.
> I would like to develop a camera type that projects an image at the inside
> of a hemispherical surface (as opposed to a flat surface as with
> perspective camera). The purpose is to generate wide-angle views (up to
> 180deg, theoretically). Yes, the widest views would be curvilinear; but up
> to ~120deg views should look pretty good. I would like to know: (1) if
> someone has already developed such a camera; and (2) if someone can offer a
> pointer to a description of the math to do this?
What about reading the documentation ?
Especially the sub-...-chapter about spherical projection in Pov-ray
Reference/Scene Settings/Camera/Types of projection.
(That should be 184.108.40.206.8 of the windows documentation, just launch
povray, hit F1 and there you are!)
So, I believe:
(2) At worst, you could look at the code of the relevant camera.
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