FreeCAD

免费的CAD软件，类似于3D MAX或者 AutoCAD
相关介绍http://juergen-riegel.net/FreeCAD/Docu/index.php?title=Main_Page
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FreeCAD will be a general purpose 3D CAD modeller. The development will be completely Open Source. As modern 3D CAX modellers it will have a 2D component to extract design drawings from the 3D model, but 2D (like AutoCAD) is not the focus, neither are animation and organic shapes (Maya, 3D StudioMAX, Cinema 4D). FreeCAD will aim directly to mechanical engineering, product design and related features (like CatiaV4 and V5, and SolidWorks). It will be a feature based parametric modeler.