Problems with flatshading.

Flatlander · Post by **Flatlander** » Thu Aug 27, 2009 4:36 pm

Gouraud shading seems to work fine but I'm getting some weird results when trying to render flat shaded objects with EMF_LIGHTING on and EMF_GOURAUD_SHADING set to false.

Basically the problem is that all the polygons are either fully lit or completely dark, there are no gray areas. Ambient lighting doesn't have any effect. It seems that all surfaces that aren't over ~50% lighted are rendered completely black?

bitplane · Post by **bitplane** » Thu Aug 27, 2009 4:39 pm

Sounds like you're drawing a scaled object without setting the EMF_NORMALIZE_NORMALS material flag

Flatlander · Post by **Flatlander** » Thu Aug 27, 2009 7:07 pm

Nope, that's not it. I'll have to do some more testing; it feels like it would have something to do with normals but the problem is same with unscaled test cube and shouldn't ambient color have some effect anyway.

lulzfish · Post by **lulzfish** » Thu Aug 27, 2009 8:36 pm

Are you using a cube test or loading a mesh from a file?

Flatlander · Post by **Flatlander** » Fri Aug 28, 2009 5:41 am

I have tried both with the test cube and several meshes in different formats.

I haven't used Irrlicht for a while but I think this still worked on my machine a few versions ago when I last tried.

Edit: I can post some test code and screenshots later when I get home.

Flatlander · Post by **Flatlander** » Tue Sep 01, 2009 8:29 pm

Okay, got it working. It was just a combination of screwed up normals and messed Blender imports