Abstract
As the most common CAD software, AutoCAD has most users in the world wide. Because it is common software, it will be complicated for users to use it for specialized graphic design. Therefore, AutoCAD allows users develop it into the secondary development system, which is meets to the designer's need and is adapted to the graphics features and graphics requirements. With the development of intelligent building, the computer aided design is introduced into the intelligent building field. However, it has no appropriate CAD software for intelligent building at present.
In this thesis, according to the characteristics of graphic design in intelligent building field, various graphics units were constructed by analyzing graphics functions and graphics features. Furthermore, a graphics software base on graphics units was developed using the secondary Development function of AutoCAD. In this design, an intelligent building graphics design software was developed, which is compose of two main sections, basic graphics tools and specialized graphics tools. Since time is limited, only arc, circle and polyline are developed in basic graphics tool, and only capacitor and switch are developed in specialized graphics tool.
