| 摘要 |
<p>A method of specifying a three-dimensional curve includes a step of input data specifying a first projected curve (CV1) and a second projected curve (CV2) which are formed when a three-dimensional curve (31a) is projected onto each of two adjacent planes in Cartesian coordinates (e.g., an XY plane and a YZ plane), a step of obtaining coordinates (ai, bi) of an ith (i = 1, 2 ... ) division point (Pi) of division points which divide the first projected curve (CV1) into a large number of line elements, a step of obtaining coordinates (bi, ci) of a point (Qi) on the second projected curve (CV2) which has the coordinate (bi) along the common axis (the Y-axis) of the coordinate axes of the two adjacent planes, and a step of specifying the three-dimensional curve (31a) using a set of points (Ri) with three-dimensional coordinates (ai, bi, ci).</p> |
