• Features that are already ported:
   - draw: LINE, CIRCLE, ARC, PLINE
   - 2D polyine may contain arcs (bulge)
   - Main UI interface and command-line
   - Render logic
   - zoom: mouse wheel up/down to scroll
   - pan: hold mouse wheel ( or Ctrl key)
     while moving the mouse
   - select: click near to select the object
   - deselect/finish: press ESC
• Currently working on...
   - draw RECTANGLE, ELLIPSE, XLINE, TEXT...
   - snap on grip-points
   - modify objects
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