Analysis of DXF file with an application to 3D graphic display

DXF(Drawing Exchange File) in AutoCAD is very popular as a graphic file format. This paper presents a comprehensive analysis of DXF file and its application to 3D display of planar graphs, such as advertisement words, for the convenience of numerical control (NC) processing. Analyses of all kinds of graphic primitives in DXF files are studied. The 3D display technology based on OpenGL is presented. Three-dimensional display effects of different kinds of planar graphs are shown to demonstrate the effectiveness of the analysis and display method. This method has been successfully applied to decorative design, advertising, industrial design, CNC operation, etc., with a friendly and intuitive human-machine interaction.