| Summary: | 碩士 === 國立中興大學 === 機械工程學系 === 93 === Abstract
The purpose of this thesis is to design a system to assist deforming shapes with a virtual glove which contains a basis frame. The control points for deforming control of the surface are selected by digitizing tablet. The surface thus can be changed by moving the control points responding to the movements of the virtual glove, which senses the finger bendings. This system can be applied to computer aided shape-design and geometry simulation in virtual reality. It is hoped that the easiness and efficiency of shape-design will be grasped in the designer's both hands.
This virtual glove includes a basis frame and a bending sensor on each of the finger. The basis frame is elastic. In its released position, fingers are guided to a reference point of origin. From that position, fingers are able to depress the shape model by bending the fingers to ward the palm and to bulge by straightening stretching. The bending and stretching degrees relative to the basis frame are measured by bending sensors mounted on the fingers of the glove.
A digitizing tablet is devised for the selection of acting points for deformation. When fingertips touch the tablet, the mode for point selection is defined. As the corresponding touching fingers make moves on the tablet, the selected points will shift to different points which then are activated for position changes.
The operational types for manipulating shape deformation include single point manipulation and regional manipulation. The control points of the surface are selected by digitizing tablet, through the relative bending changes of the fingers, the amounts of displacements of those control points will be generated to deform the surface. With such designed virtual gloves and collaborating manipulation method, the shape deformation process is simulated and manipulated beyond the reality of kneading clay through human hands.
Keyword: virtual glove, surface, bending sensor, basis frame, digitizing tablet.
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