glColorMaterial()
If only one material property is to be changed, it is more efficient to use glColorMaterial( )
glColorMaterial( ) causes material to track glColor*( ) glEnable(GL_COLOR_MATERIAL);
glColorMaterial(GL_FRONT, GL_DIFFUSE);
glColor3f(0.2, 0.5, 0.8); // this changes the diffuse material color
Draw objects here
glColorMaterial(GL_FRONT, GL_SPECULAR);
glColor3f(0.9, 0.0, 0.2); // this changes the specular material color
Draw objects here
glDisable(GL_COLOR_MATERIAL);