Re: Projection for displaying simple 3D graphics

Sounds great. I personally have not done anything like what you are
suggesting, but I'd like to at some point. I'll keep watch for
developments in this forum, and contribute when I have the opportunity.
good luck!

jeff

Dave Hallam wrote:
>
> Hi,
>
> I'm thinking about adding things like 3D coverage domes from radars or
> conical coverage from satellites but because the orthographic
> projection is always centered pointing to the centre of the earth, I
> can't see the horizon unless I zoom right out - but then I lose the
> detail.
>
> Has anyone written a projection class that allows the earth to be
> moved around so that you can change the camera view from being
> vertically down to having some other angle, say 45 degrees.
>
> I think this would be a great benefit to the OpenMap community as it
> would allow users to display data with altitudes rather than being
> data that is drawn on the surface of the earth. I guess classes such
> as OMPoint would have to be subclassed to something like OMPoint3D to
> include altitude.
>
> This could lead to having DTED data displayed in 3D on the map as
> well. It wouldn't require too much processing because it wouldn't
> have to be a real-time display - though if someone wanted to there's
> no reason why not - look at JCanyon using the java.nio package at
> http://java.sun.com/products/jfc/tsc/articles/jcanyon/.
>
> I would be very interested to hear whether anyone has already done
> this or not ot other peoples views on the way to approach the problem
> and possible solutions.
>
> Many thanks,
>
> Dave
>
> Tel: +44 (0) 7092 250 375
> Fax: +44 (0) 7092 250 375
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Jeffrey Mathis, PhD		FAX: 505-988-2229
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