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How to support collaborative modelling with the emerging standard MPEG-4 MU

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3 Author(s)
Duarte, F.V. ; Comput. Sci. Dept., Univ. Fed. de Sao Carlos, Brazil ; Verdi, M. ; Araujo, R.B.

In a collaborative modelling environment, multiple users may interact in a virtual environment to deform or modify shared 3D objects (e.g., for modelling and visualization of virtual prototypes). The challenges to collaborative modelling are related mainly to four aspects: user interaction with the virtual modelling environment, 3D object concurrent editing, consistency maintenance among client terminals and real time rendering of the modified 3D objects. The use of Non-Uniform Rational B-Splines (NURBS) surfaces accelerates the rendering process since a small number of control points are used to represent the objects, resulting in a large data compression. Nowadays a number of technologies has either emerged or evolved to support 3D environments, such as: X3D, Java3D and MPEG-4 MU. This paper shows how the emerging MPEG-4 MU standard can be used to support real-time modelling through NURBS in a shared virtual environment among multiple client terminals.

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Computer Graphics and Image Processing, 2002. Proceedings. XV Brazilian Symposium on

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