[Plib-users] Light & material problem

[P.GILARDETTI <p.g...@li...>]

Hi,
	I'm a newbie, I have a problem because I load a dxf model that is black 
and hasn't a texture.
I want to associate some settings about material to this model and I don't 
know how to do.
	
I load the model with the code:
   scene = new ssgRoot();
   model = new ssgTransform();
   ssgEntity *obj = ssgLoad ( filename );
   model -> addKid(obj);
   scene -> addKid(model);

Then I set the state of the model with:
   state = new ssgSimpleState();
   state -> setShadeModel(GL_SMOOTH);
   state -> enable(GL_CULL_FACE);
   state -> enable(GL_BLEND);
   state -> enable(GL_LIGHTING);
   state -> setColourMaterial(GL_AMBIENT_AND_DIFFUSE);
   state -> setMaterial(GL_EMISSION, 0, 0, 0, 1);
   state -> setMaterial(GL_SPECULAR, 1, 1, 1, 1);
   state -> setShininess(4);

Then I would illuminate the 3d model, should I specify the normal for each 
vertex of the model or can I only use the following statement?

sgVec3 sunpos;
sgSetVec3(sunpos, 10.0f, 10.0f, 10.0f);
ssgGetLight(0) -> setPosition(sunpos);

Thanks,
Paolo Gilardetti