| 摘要 |
PURPOSE:To remarkably shorten the processing time by converting the control point of a non-uniform B spline function to the control point of Bezier function by using a conversion coefficient table. CONSTITUTION:This system is provided with a data converting means consisting of a conversion table in which a conversion coefficient for converting the coordinate of a control point in a non-uniform B spline function to the coordinate of a control point in Bezier function is stored, and a sum-of-products computing element for executing the sum-of-products operation of the conversion coefficient obtained from this conversion table and input curve data. In such a state, by this data converting means, the input curve data expressed by the non-uniform B spline function is converted to the data of the Bezier function, and by using the obtained data of the Bezier function, a curve is generated by a Bezier function generator. In such a way, the conversion to the control point of the Bezier function of the control point of the non-uniform B spline function can be executed at a high speed. |
