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I'm actualy just working onpsued code at the time but I need to figure out a way to move objects around a sphere.

1 Supose I have a sphere, I know how to create, position ect. the sphere. Here's where it gets tricky though, supose the sphere is earth, and I want to place a secound object on the surface of the sphere. I ca easily specify in my program where a city or whatever is in longitude and lattitude, but how do find the 3d coordinates (X,Y,Z) so I can place it in the 3d world.

2 Supose I hace an aircraft taking off from a certian point (specified in longitude and Lattitude) and going to another point, supose it has travled X distance toward the destination, How do I fnd it's current location(long. Latt.)

I'm not sure if the answers to these questions can be found within DBPro code or just in math. Either way my head hurts, but I gotta find it.

Thanks for any help

This is a code example I wrote up for a tiny worlds demo. Perhaps it will help. It uses relative positioning commands and very little 3D math.
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TAZ

http://www.geocities.com/tzircher/tiny_world.htm

Thanks for the code zircher, although it hadnothing to do with what I'm currently doing it is a well written litle freeflight control system. I liked it.

It didn't help me any but thanks anyway