Learning techniques of CAD Operations to Restore Partial Omissions in 2D Drawings

摘要

Presently solid modeling is essential for CAD and its applications. However, most of small companies still use 2D CAD systems mainly, and ordinarily solid models are made manually from 2D drawings because they are usually incorrect in geometry and simplified. If 2D drawings are correct, solid models would be automatically generated by using existing systems. In this paper, a method is proposed that isolated line segments made by the partial omissions in 2D drawings can be restored by learning CAD operations. In this method, when a user operates isolated line segments to restore partial omissions repetitively, operations can be learned and generalized in a CAD system. Generalized operations can automatically restore a new input 2D drawing including partial omissions.