Would like ventilation network topology generated by the dxf file,
The first problem is to read dxf file,
Find the dxf file java-based platform key tips
TWaver import and export AutoCAD DXF drawings mentioned method, but the effect is not good,
http://twaver.servasoft.com/twaver-java/twaver%E5%AF%BC%E5%85%A5%E5%AF%BC%E5%87%BAautocad-dxf%E5%9B%BE%E7%BA%B8.html
Read out of chaos FIG dxf_build-120307-2344,
ycad-1.0.2 read out better,