CAD system with parallel dimension-line editing function

摘要

A Computer Aided Design (CAD) system with a dimension line editing function manages a drawing involving dimension lines and displays the drawing on a display unit connected to a terminal. The system edits the drawing according to a specified one of the dimension lines. The system has a setting unit for interactively setting an objective dimension line through the terminal; a retrieving unit for retrieving, in the drawing, dimension lines that are in parallel with the objective dimension line; and an editing unit for editing drawing data corresponding to the objective and parallel dimension lines according to a change quantity entered for the objective dimension line. The CAD system only asks a user to specify an objective dimension line to be edited as well as a change quantity applied to the dimension line. According to the specified data, the CAD system edits drawing data corresponding to the objective dimension line as well as drawing data corresponding to dimension lines that are parallel to the objective dimension line. This CAD system never asks the user to specify endpoints of the dimension lines to be edited one by one, so that the user can efficiently edit drawing data involving many dimension lines.