A methodology for solid modelling in a virtual reality environment
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This paper presents a methodology for solid modelling in a virtual reality (VR) environment. Solid modelling in the VR environment is precisely performed in an intuitive manner through constraint-based manipulations. A hierarchically structured and constraint-based data model is developed to support solid modelling in the VR environment. Constraint-based manipulations are realized by allowable motions for precise 3D interactions in the VR environment. A mathematical matrix is presented for representing allowable motions. A procedure-based degree-of-freedom combination method for 3D constraint solving is presented for deriving the allowable motions from constraints. A rule-based constraint recognition engine is developed for both constraint based manipulations and implicitly incorporating constraints into the VR environment. A prototype system has been implemented to testify the feasibility of the presented methodology.
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Zhong, Yongmin; Ma, W. (2004)With today’s Virtual Reality (VR) systems, it is difficult to directly and precisely create and modify objects in a VR environment. This chapter presents an approach for solid modelling in a VR environment. Solid modelling ...
Zhong, Yongmin; Mϋller-Wittig, W.; Ma, W. (2003)This chapter presents an efficient approach for solid modeling in a Virtual Reality (VR) environment. A hierarchically structured constraint-based data model is developed to support solid modeling in the VR environment. ...
Zhong, Yongmin; Shirinzadeh, B.; Ma, W.; Liaw, H. (2005)With today’s irtual reality (VR) systems, it is difficult to create precise assembly models through 3D interactions due to hardware limitations. In this paper, an efficient approach is presented for intuitive and precise ...