Hi, I was wondering if somebody could give me a hand here... I''m drawing a few triangles ( I guess you could call them a model ) using a basic GL_TRIANGLES setup, with the "front" of the model pointing along the x axis. Now, what I want to do is rotate the (modelview?) matrix so that when the model is drawn on the screen, the "front" is pointing along a certain vector ( a normalized velocity in this case ), without any roll. I''ve got something going, but I''m getting strange results. At the moment it looks like this: double pitch = -atan(m_velocity.y / sqrt(m_velocity.z * m_velocity.z+ m_velocity.x*m_velocity.x)); double yaw = atan2( m_velocity.x, m_velocity.z); glRotatef( pitch / PI * 180 , 0,0,1 ); glRotatef( yaw / PI * 180, 0,1,0 ); I kind of took the above code from somewhere, and don''t really understand it so it may not make too much sense. Any help would be much appreciated!