Lighting issues in OpenGL

Question

I have a triangle mesh that has no texture, but a set color (sort of blue) and alpha (0.7f). This mesh is run time generated and the normals are correct. I find that with lighting on, the color of my object changes as it moves around the level. Also, the lighting doesn't look right. When I draw this object, this is the code:

glEnable( GL_COLOR_MATERIAL );
float matColor[] = { cur->GetRed(), cur->GetGreen(), cur->GetBlue(), cur->GetAlpha() };
float white[] = { 0.3f, 0.3f, 0.3f, 1.0f };
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, matColor);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, white);

Another odd thing I noticed is that the lighting fails, when I disable GL_FRONT_AND_BACK and use just GL_FRONT or GL_BACK. Here is my lighting setup (done once at beginning of renderer):

m_lightAmbient[] = { 0.2f, 0.2f, 0.2f, 1.0f };
m_lightSpecular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
m_lightPosition[] = { 0.0f, 1200.0f, 0.0f, 1.0f };

glLightfv(GL_LIGHT0, GL_AMBIENT, m_lightAmbient);
glLightfv(GL_LIGHT0, GL_SPECULAR, m_lightSpecular);
glLightfv(GL_LIGHT0, GL_POSITION, m_lightPosition);

EDIT: I've done a lot to make the normals "more" correct (since I am generating the surface myself), but the objects color still changes depending where it is. Why is this? Does openGL have some special environment blending I don't know about?

EDIT: Turns out the color changing was because a previous texture was on the texture stack, and even though it wasn't being drawn, glMaterialfv was blending with it.

Answer 1

If your lighting fails when GL_FRONT_AND_BACK is disabled it's possible that your normals are flipped.

Answer 2

Could you post the code that initializes OpenGL? You're saying that all other meshes are drawn perfectly? Are you rendering them simultanously?