Abstract: It is a difficult task for university teachers to check assignments of civil engineering drawing
manually. In order to develop an assignment auto-checking system to improve efficiency, the
recognition of vector graphics and implementation scheme of the assignment auto-checking system are
discussed based on self-made vector graphics platform ATVGP. A new method of curve recognition is
proposed in our study. Auto-checking system for civil engineering drawing assignments is achieved by
using of VC++ programming environment.

Key words: vector graphics, engineering graphics, auto-checking, graphic platform, VC++