title: Store DXF line nodes
body: <p>first post here.
  I am a CNC machine operator and i want to make a program that outputs code for my CNC machine (G-code).</p>
  
  <p>What i am trying to understand is how i can put the start and en points of line`s inside my DXF file containing the geometry i want to machine, to some sort of list, so i can (hopefully) do some sweepline calculations with them.</p>
  
  <p>I found al lot of information about how to read a DXF file, but i could not find how to store these points.</p>
  
  <p>SO: how can i save a pair of line points (x1 y1 , x2 y2) to a list an calculate with them.</p>
  
  <p>never mind my bad english </p>