How to use "updateNormals and VertexNormals"?

Hi all,

"updateNormals": according to help manual...


When I do lighting in gile[s], I haven't used these
2 commands. Are they important?

Thanks in advance
Sammy
:)

You shouldn't need to use them with models from gile[s].

when you import a model in giles and it's looking really crazy then you should try that. If the shading is looking ok then you don't need to do this in giles.

I see.
Is it the fact that some 3d modellers may change
the normals of models? That's why we sometime need to
use these 2 commands?

Sammy
:)

you will need them especially if a modeller saved a mesh without normals, or with bad or wrong normals. Basicly the normals give the orientation of each Triangle in space. based on this information it will be shaded and smoothed. The Normals are calculated and thenstored in the mesh file. They should be stored in every mesh file, but the world isn't perfect, so giles allows to recalculate them.

Thank you.

:)