culling by skyke

1

glEnable( GL_CULL_FACE );     glBegin( GL_QUADS );         glCullFace( GL_BACK );         glNormal3f( 0.0 , 0.0, 1.0);         glVertex3f(0.0,0.0,0.0);         glVertex3f(1.0,0.0,0.0);         glVertex3f(1.0,1.0,0.0);         glVertex3f(0.0,1.0,0.0);     glEnd();     glBegin( GL_QUADS );         glCullFace( GL_FRONT );         glNormal3f( 0.0 , 0.0, -1.0);         glVertex3f(0.0,0.0,0.0);         glVertex3f(1.0,0.0,0.0);         glVertex3f(1.0,1.0,0.0);         glVertex3f(0.0,1.0,0.0);     glEnd();