| 摘要 |
A method of modeling a 3-dimensional object including performing one of a rounding operation generating the 3-dimensional object from a control grid and an inverse rounding operation generating a control grid from the 3-dimensional object depending on which one of the control grid and the 3-dimensional object is newly provided, the control grid including a plurality of edges and a plurality of vertexes, the 3-dimensional object including a plurality of boundary curves and a plurality of curved surfaces deforming the control grid by shifting the plurality of vertexes, performing the rounding operation when the control grid is deformed so as to introduce the deformation of the control grid to the 3-dimensional object, attaching a weight to one of the plurality of vertexes of the control grid to deform a corresponding one of the plurality of curved surfaces of the 3-dimensional object, attaching a weight to one of the plurality of edges of the control grid to deform a corresponding one of the plurality of boundary curves of the 3-dimensional object, and attaching information on a respective weight to a corresponding one of the plurality of vertexes and the plurality of edges as an attribute thereof.
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