| 摘要 |
PROBLEM TO BE SOLVED: To provide a shape correction method for exactly correcting surface relief on CAD data.SOLUTION: A range in the surroundings of an apex P where distance h from a tangent plane S1 to surface relief W becomes equal to or less than distance H for setting a correction range R is set as the correction range R of the surface relief W, and a correction amount L in the correction range R is calculated by using a relational expression f(h/H) of the correction amount in the correction range R according to a ratio between the distance h from the tangent plane S1 to the surface relief W, and the distance H for setting the correction range R. The relational expression f(h/H) is regulated by an equation in which a graph G to be drawn by the ratio h/H of the distances and a value of the relational expression f(h/H) draws a smooth curve, and curvature of the graph G at a position where the ratio h/H of the distances is 1 becomes 0. |
