Virtual modelling of solid objects with constraint-based manipulations
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This paper presents an intuitive approach to precise solid modellingin virtual reality environments. A hierarchically structured modelis established to handle the tasks of object definition, objectcreation, and object rendering with an integrated data structure.Constraints are organized at different levels on different objectsand are embedded in the data structure. A constraint reasoningengine is developed to automatically determine allowable motions forprecise manipulation of virtual objects with online assistance fromconstraints. Examples are presented to demonstrate the advantageof precise solid modelling through constraint-based manipulations invirtual environments.
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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; Ma, W.; Shirinzadeh, B. (2005)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 ...