Vertex/BackFaceCulling

EntraX666 · Post by **EntraX666** » Mon Sep 12, 2005 10:41 am

Hello all,
I create an 3D model vertex by vertex but when backfaceculling is actived, only a part of the sphere is draw

I think it is a problem with the normal but I don't manage to fix it.

Thank you

tip · Post by **tip** » Mon Sep 12, 2005 2:41 pm

the "south pole" of your sphere shouldn't be visible at all, i guess that your normals are messed up. Do you need a sample code for calculating your normals?

crimsoncipher · Post by **crimsoncipher** » Mon Sep 12, 2005 4:05 pm

It might also be that your indices are messed up. Just try reversing the order of the indices for each triangle.

Guest · Post by **Guest** » Mon Sep 12, 2005 4:11 pm

I don't know how calculate the normal, I have tried some data (-1, 1,0) but there are no change. So, if you could help me to calculating the normals I thank you !!

Guest · Post by **Guest** » Mon Sep 12, 2005 4:14 pm

Ok, I try it.

EntraX666 · Post by **EntraX666** » Tue Sep 13, 2005 3:23 pm

It's ok !!! Thank you very much !!

Irrlicht Engine

Vertex/BackFaceCulling

Vertex/BackFaceCulling

normals are wrong