xi8000

07-21-2012, 11:01 AM

Hello,

i want to use opengl (the z-buffer solution)

to find out which surfaces of my 3D building model are visible.

But i'm not expert in openGL.

So do you have any ideas which openGL-function

has to be used to solve this problem?

The surfaces are all polygons. Some of them have polygon holes inside.

How can i tell openGL my polygons?

How can openGL give me a list of polygons that are visible

in the view frustum? It should be just a list with

the polygon ID, not the exact polygon excerpt which

is visible.

Thank you very much for helping!

i want to use opengl (the z-buffer solution)

to find out which surfaces of my 3D building model are visible.

But i'm not expert in openGL.

So do you have any ideas which openGL-function

has to be used to solve this problem?

The surfaces are all polygons. Some of them have polygon holes inside.

How can i tell openGL my polygons?

How can openGL give me a list of polygons that are visible

in the view frustum? It should be just a list with

the polygon ID, not the exact polygon excerpt which

is visible.

Thank you very much for helping!