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Proceedings of CAD'14, 2014, 215-218
SimplyNURBS: A Software Library to simplify the use of NURBS Models and its Application for Medical Devices

Giorgio Colombo, Politecnico di Milano
Giancarlo Facoetti, Caterina Rizzi, Andrea Vitali, Università degli studi di Bergamo

Abstract. Nowadays, there are many software libraries (both open source and commercial), which make available the basic features to manage NURBS surfaces. In this paper we consider open source libraries, such as NURBS++, OpenCASCADE and AYAM, for the development of a modeling system specifically conceived to design prosthetic socket. Even if these libraries are broadly used and include many basic operations on NURBS models, they still have some criticalities. For example we have experienced the use of NURBS++ library to develop the first release of the above-mentioned socket modeling system, named Socket Modeling Assistant-SMA. Even though this library makes available features for NURBS creation and management, it has some lacks with regards to its usability. Fitting accuracy could be improved by increasing the number of points but this can cause computing performance drop during the interaction with NURBS models. Furthermore, the development of NURBS++ has stopped since 2002. Other libraries (e.g., AYAM) have been investigated to face identified criticalities. Therefore, we have envisaged the need of a library which permits to manage NURBS surfaces in a completed and easily way and merges the features of mentioned libraries.

Keywords. NURBS, socket modeling, open source libraries

DOI: 10.14733/cadconfP.2014.215-218