D3DCULL_CCW and BackfaceCulling

aheymann · Post by **aheymann** » Thu Jun 19, 2008 4:10 pm

Hallo

Does anybody know how DirectX uses D3DCULL_CCW to cull triangles? Does it use vertex normals or does it actually check the direction of each triangle?

Thanks

Anton

torleif · Post by **torleif** » Tue Jul 15, 2008 10:31 am

Direct X is closed source, so you won't be able to see how backface culling is done. MSDN will give a vague description, but really won't tell you

I'm sure irrlicht has it's own culling method, of which you can view

JP · Post by JP » Tue Jul 15, 2008 10:36 am

The backface culling is generally done on vertex winding order of a triangle, the normals are just used for lighting.

Mirror · Post by **Mirror** » Tue Jul 15, 2008 11:22 am

CCW probably means counter clock wise ( winding order as JP said )