View Full Version : how to determine visible polygons???

10-27-2002, 03:03 AM
i'm trying to write some kind of 3dengine and i've got trouble with generating viewing cone.

i want to use gluLookAt() to place observer somewhere and want to determine which polygons should be sent to gl. i could use gluProject to generate left, right, top and bottom clipping planes but i also want far and near planes (z-coordinate is strange after gluProject so it cannot be used in this way)

i'm just seeking for some useful math or trick.... heeeelp, i'm lost...

Leyder Dylan
10-29-2002, 08:20 AM
Use Frustum Culling

The ultimate Website for that is :


10-31-2002, 08:28 AM
thnx...!!! http://www.opengl.org/discussion_boards/ubb/smile.gif