   Moving object along z axis
  Hello,I want to  to transform the object (mesh ) :translate it along z axis (in the global coordinate system).The problem is  that  it moves not  along the z axis but diagonally (according to position /slope angle of the object) here is a snippet from the code.What do you think the problem is?glMatrixMode(GL_MODELVIEW);glLoadIdentity();gluLookAt(...);glTranslatef(0,0,n)   