| For a long period, defining the lightning rod's lightningproof safe extension is necessary and important in the electric equipment's installation and building design especially tinder building design. Though the computing difficulty of lightningproof safeguard isn't hard, several lightning rod's uniting safeguard especially not a contour-line's uninting safeguard makes trouble in computing, and the change of one or some lightning rod's position can make repeating computing then its humdrum result in making faults in computing, this can make a big loss in the project. The computer is adept in computing and the possibility of making faults is very little, the software of electric lightningproof design can solve these problems, and it is our software design's original intention. The main content this paper discusses is:l.introduction.explaining the domestic status of lightningproof design software and the necessity of its study and developing.2.We have adopted ObjectARX developing tool, explained the structural characteristic of ObjectARX application, introduced redesign technique for AutoCAD2002 in ObjectARX developing environment, so that we can offer programming foundation to the developing of lightningproof design software.3.The detailed process of the software's developing, in this chapter we main produce the function of the software and the programme realizing.4.The study and realization of lightningproof design's visualization, in this chapter we take the lightningproof extension of the lightning rod as examples, producing the geometric methodology of lightning rod's safe extension and the realizing process of visualization.5.The software had succeeded in application of HaoChen electric design software, Beijing HaoChen software company is one of the leaders in electric design software in China, the significance of the software's application is important.The practice proved, the programme we made can achieve the precision of project and improve the efficiency, it has an important signifance in the electric lightningproof software. |