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

机译:分层结构和基于约束的数据模型,用于在虚拟现实环境中进行直观而精确的实体建模

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摘要

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 solid model 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.
机译:本文提出了一种层次结构和基于约束的数据模型,用于在虚拟现实(VR)环境中进行直观而精确的实体建模。数据模型集成了用于直观和精确操作的基于高级约束的模型,用于完整和精确表示的中级实体模型以及用于在VR环境中进行实时交互和可视化的低级多边形网格模型。实体模型基于混合B-rep / CSG数据结构。约束嵌入在实体模型中,并在层次结构上组织为内部特征元素之间的特征约束,内部特征之间的零件约束以及各个零件之间的装配约束,此外还提供了完整而精确的模型表示以及对实时的支持通过可视化,提出的数据模型允许通过基于约束的操作进行直观,精确的交互,从而在VR环境中进行实体建模。由于当今VR输入和输出设备的分辨率有限,这对于VR环境中的产品设计而言是一个至关重要的问题。

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