DXF

DXF is a file format to exchange CAD data from Autodesk.

Currently, the following Autodesk CAD entity types are supported:

• LWPOLYLINES (2 dimensional line strings), including buldges
• LINE (single lines)
• POLYLINE (3 dimensional line strings), currently only interpreted as 2 dimensional. The z-coordinate is ignored.
• HATCH (polygonal data constructed using other boundary entities)
• CIRCLE: full and partial circles, given a center point, radius and start and end angle.
• ELLIPSE: full and partial ellipses, given a center point, major and minor axis, rotation and start and end angle.
• ARC: curved lines given a center point and a radius.
• VERTEX: 2 dimensional point.
• POINT: Same as vertex, but 3 dimensional. Currently only interpreted as 2 dimensional. The z-coordinate is ignored.
• SPLINE: 2 dimensional Control point splines are currently supported.