Fully free-form deformation features (d-F4) incorporating discontinuities (Contributo in atti di convegno)

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Label
  • Fully free-form deformation features (d-F4) incorporating discontinuities (Contributo in atti di convegno) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Alternative label
  • Vincent CHEUTET, Jean-Philippe PERNOT, Jean-Claude LEON, Bianca FALCIDIENO, Franca GIANNINI (2004)
    Fully free-form deformation features (d-F4) incorporating discontinuities
    in DAC'04: International 2004 Design Engineering Technical Conferences And Design Automation Conference, Salt Lake City, USA, September 28 - October 2, 2004
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Vincent CHEUTET, Jean-Philippe PERNOT, Jean-Claude LEON, Bianca FALCIDIENO, Franca GIANNINI (literal)
Pagina inizio
  • 1 (literal)
Pagina fine
  • 10 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Proceedings of DAC'04 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autoriCuratela
  • Cheutet V., Pernot J-P., Léon J-C., Falcidieno B., Giannini F. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • International 2004 Design Engineering Technical Conferences and Design Automation Conference, September 28 – October 2, 2004, Salt Lake City, Utah, USA (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Laboratory 3S - Integrated Design Project, UMR CNRS 5521 - UJF - INPG, Domaine Universitaire, 38041 Grenoble Cedex FRANCE Instituto di Matematica Applicata e Tecnologie Informatiche - CNR, Via de Marini, 16149 Genova ITALY (literal)
Titolo
  • Fully free-form deformation features (d-F4) incorporating discontinuities (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#inCollana
  • Proceedings of ASME DAC'04 (literal)
Abstract
  • To limit low-level manipulations of free-form surfaces, the concept of Fully Free Form Deformation Features (?-F4) have been introduced. They correspond to shapes obtained by deformation of a surface area according to specified geometric constraints. In our work, we mainly focused on those features aimed at enforcing the visual effect of the so-called character lines, extensively used by designers to specify the shape of an object. Therefore, in the proposed approach, 3D lines are used to drive surface deformation over specified areas. Depending on the wished shape and reflection light effects, the insertion of character lines may generate surface tangency discontinuities. In CAD systems, such kind of discontinuities is generally created by a decomposition of the initial surface into several patches. This process can be tedious and very complex, depending on the shape of the deformation area and the desired surface continuity. Here, a method is proposed to create discontinuities on a surface, using the trimming properties of surfaces. The corresponding deformation features produce the resulting surface in a single modification step and handle simultaneously more constraints than current CAD systems. The principle of the proposed approach is based on arbitrary shaped discontinuities in the parameter domain of the surface to allow the surface exhibiting geometric discontinuities at user-prescribed points or along lines. The proposed approach is illustrated with examples obtained using our prototype software. (literal)
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