| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Yukinori Muroran Inst. of Tech., Faculty of Engineering, Associate Professor, 工学部, 助教授 (00179269)
MAEDA Junji Muroran Inst. of Tech., Faculty of Engineering, Professor, 工学部, 教授 (00002311)
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| Budget Amount *help |
¥6,100,000 (Direct Cost: ¥6,100,000)
Fiscal Year 2001: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2000: ¥4,400,000 (Direct Cost: ¥4,400,000)
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| Research Abstract |
The aim of this research was to establish FSCI-3D, which is a method that recognizes freehand drawing gesture in 3-dimensional space as spatial geometric curves, and to construct an intuitive general-purpose 3-dimensional CAD input interface on the basis of FSCI-3D. Through the research, we have materialized two versions of prototypes of such interfaces, which are respectively named "BlueGrotto" and "Grand BlueGrotto", utilizing immersive virtual reality environments. We have also confirmed that users can input a great variety of 3-dimensional geometric CAD primitives, such as a cube, a rectangular parallelepiped, a sphere, a column, a cone, a torus, a tube, a body of rotation, and so on, by an intuitive and consistent procedure. The outline of the user interface is as follows.
1. A user draws a swept shape and a sweeping path using a pen in a immersive virtual reality environment.
2. FSCI-3D recognizes the shape and the path by inferring the intention of the user from the drawing manner, and identifies them as a combination of spatial geometric curves such as lines, circles, circular arcs, ellipses, elliptic arcs, closed free curves and open free curves.
3. The interface automatically snaps the identified objects to align them.
4. If needed, a user can make fine adjustments to the objects by pen-based editing interface.
5. The interface creates a 3D-CAD entity by sweeping the swept shape along the sweeping path. (For example, a circle swept along a circular arc creates a sphere.)
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