gluQuadricNormals.3G man page
gluQuadricNormals — specify what kind of normals are desired for quadrics
void gluQuadricNormals(GLUquadric* quad, GLenum normal);
Specifies the quadrics object (created with gluNewQuadric()).
Specifies the desired type of normals. Valid values are GLU_NONE, GLU_FLAT, and GLU_SMOOTH.
gluQuadricNormals specifies what kind of normals are desired for quadrics rendered with quad. The legal values are as follows:
No normals are generated.
One normal is generated for every facet of a quadric.
One normal is generated for every vertex of a quadric. This is the initial value.
gluNewQuadric(), gluQuadricDrawStyle(), gluQuadricOrientation(), gluQuadricTexture()
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