A 3D scene within a 3D scene

Question

Hi, Consider a camera (on a plane) viewing a 3D model of terrain. Imagine now that it takes a photograph of what it sees. I would like to view the terrain from a different camera (even move that camera around) and I would like to see the picture taken by the plane projected on the terrain.

My current approach has been as follows: Create a 3D scene representing the plane view. Create a 3D scene representing the observer view. Inside the latter scene there is a model of the terrain upon which I project the whole 3D scene from the plane.

It doesnt work as expected - I wont go into the details quite yet, but can anyone say whether they think this would be the right approach?

Maybe one scene is sufficient with some matrix magic?

Thanks for any ideas !

David

Answer 1

I think the general way of doing something like this rendering the plane view to a texture, then overlaying that texture on the terrain in the observer view.

Unless of course that's what you're already doing.