title: OpenGL - How to draw 3D pipeline as the windows screensaver
body: <p>Given a group of 3D points and the size of diameter, I want to draw a 3D pipeline same as the windows pipeline screensaver <a href="http://answers.yahoo.com/question/index?qid=20080919090035AAO55Qv" rel="noreferrer">http://answers.yahoo.com/question/index?qid=20080919090035AAO55Qv</a>.</p>
  
  <p>I am using C++ and OpenGL. Can anyone help me find the resource that can show me how to achieve this?
  After a little investigation, it seems that we have to do extra work in order to make the turning point look smooth. If possible, i am looking for some sample codes that illustrate how to implement this</p>
  
  <p>Thank you</p>