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    A hierarchically structured and constraint-based data model for intuitive and precise solid modeling in a virtual reality environment

    Access Status
    Fulltext not available
    Authors
    Ma, W.
    Zhong, Yongmin
    Tso, S.
    Zhou, T.
    Date
    2004
    Type
    Journal Article
    
    Metadata
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    Citation
    Ma, Weiyin and Zhong, Yongmin and Tso, Shui-kit and Zhou, Tianxiang. 2004. A hierarchically structured and constraint-based data model for intuitive and precise solid modeling in a virtual reality environment. Computer Aided Design 36 (10): pp. 903-928.
    Source Title
    Computer Aided Design
    DOI
    10.1016/j.cad.2003.09.001
    ISSN
    0010-4485
    URI
    http://hdl.handle.net/20.500.11937/38015
    Collection
    • Curtin Research Publications
    Abstract

    This article proposes a hierarchically structured and constraint-based data model for intuitive and precise solid modeling in a virtual reality (VR) environment. The data model integrates a high level constraint-based model for intuitive and precise manipulation, a middle level solidmodel for complete and precise representation and a low-level polygon mesh model for real-time interactions and visualization in a VR environment. The solid model is based on a hybrid B-rep/CSG data structure. Constraints are embedded in the solid model and are organized at hierarchical levels as feature constraints among internal feature elements, part constraints among internal features and assembly constraints between individual parts. In addition to providing a complete and precise model representation and the support for real-time visualization, the proposed data model permits intuitive and precise interaction through constraint-based manipulations for solid modeling in a VR environment. This is a critical issue for product design in a VR environment due to the limited resolutions of today’s VR input and output devices.

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