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Varkon Interactive users manual

# Import and export

## DXF

The DXF format was originally defined as a DrawingeXchangeFormat for AutoCAD but is now widley used to exchange 2D geometry between systems of various kinds. DXF also has support for simple 3D geometry. Varkon supports import of DXF files through a module library, see VARKON_ROOT/sources/Vlib/dxf. Import is limited to support only the most common entities and attributes of the DXF specification.

Varkon DXF export supports all Varkon entities. Varkon entities that are not supported by the DXF specification are converted to the DXF POLYLINE entity.

## IGES

The ANSI IGES format is supported by most CAD systems, primarily for import and export of 3D wireframe and surface geometry. Varkon supports import of IGES files through a module library. See the README_IGES in VARKON_ROOT/sources/Vlib/iges for more info on the IGES import library.

Varkon does not support IGES export.

## STL

STL was originally defined as a file format for rapid prototyping using STereoLitografy. It is a simple 3D format limited to plane triangular facets. Varkon supports import of STL files in text or binary format. Each facet in the STL file is mapped to a b_plane in Varkon.

Varkon supports export of b_planes, facet surfaces and mesh entities on STL text format.

## PLT

The PLT format is used by Varkon primarily for printing and plotting but can also be used for static 2D symbols. The PLT format conforms to the ISO GKS Metafile format specification for 2D vector graphics. Varkon supports export of all entities on PLT format.

Varkon supports import of PLT files through the MBS SYMB() procedure.

Varkon version 1.19C svn# 120