title: Drawing 3D Lines with WPF
body: <p>We all know there are no native functionality within WPF 4.5 to draw pure lines in 3D space on a viewport3D.</p>
  
  <p>And I'm aware of the fact there are a few 3D-toolkits for WPF. But for my masterthesis I built my own 3D-engine. It's almost complete but i would like to be able to draw the wireframes of my object (for example to show tessellation of a sphere).
  my engine can render almost every basic geometric form (cube, sphere, cone, cylinder, pyramid, ..)</p>
  
  <p>have you any idea how to draw lines? (my only idea is to use a very thin cylinder or cube ... but i don't think that is very efficient because i have to render at least 8 points (12 triangles) for one single line)</p>