Lighting problem - directx

dont confuse shadows with unlit. need more info, shaders? fixed function?

Just a thought: could be that you use per vertex lighting with a point light with a given radius. In that case, if vertex is within the light range, color is interpolated between all vertices of the triangles. Moving the vertex out of the light range when your cube rotates would result in some kind of "popping" effect.

Murdocki: what I mean by max shadow is that the diffuse lighting doesn't show, but the ambient light does. and by max lit I mean that both the ambient light and diffuse light are on, and the diffuse is at maximum for the whole surface.

If by "shaders?" you are asking if I use pixel shaders for this, the answer is no. I don't know what you mean by "fixed function?".


gl_Obetrotter: the light I use is directional.

Are your normals of unit length?

Zao: yes. They are set with D3DXVECTOR3(0.0f, 0.0f, 1.0f); or D3DXVECTOR3(0.0f, -1.0f, 0.0f); etc, for example.

Problem solved.

After Zao hinted on IRC that I should double check my mesh I realised that the last two sides did not have normals defined.

Many thanks all :)

oh wth nvm