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Member Since 12 Oct 2006
Offline Last Active Oct 02 2013 09:00 PM

#4821704 Vertices, Normals and Indices

Posted by SmellyIrishMan on 10 June 2011 - 07:58 AM

Think about a cube also.

A cube has 8 vertices, but there needs to be 3 normals at each of those vertices (for a total of 24 normals) if you want to get accurate shading results. Have a look at this image for an example of that. Cube with proper normals. These additional normals are typically created when the angle between two normals on the same vertex break a certain threshold.

If you had just one averaged normal at each vertex then you get this and that's going to give you some funky shading.