通过对CAD/CAM文件的识别来建立不同的文件格式。-CAD/CAM software products can help boost productivity for machining medical parts. However, the process of uating and re-calculating CAD model design is basically carried out manually. The demand for automated CAD process

读取DXF文件和保存DXF文件,处理通用实体，并且加入了Polygon和Polyface的接口-his is not a complete DXF reader package, but it handles most entities that are commonly found. With this release I ve added the Polygon mesh and Polyface mesh varieties of POLYLINE, so a great