| The automation of house information management with computer can reduce the enterprise cost and improve the enterprise competence. Most of the elevation drawing systems, which are complicated in operation and poor quality to the elevation drawing. The most disadvantages are difficult to make data exchange. In this paper, graphic drawing, XML and database technology are studied deeply to resolve the problem. This paper mainly includes the following aspects:Firstly, this paper analyzes the needs of CAD system which applies network environment; investigate of the current development level about architectural CAD. Then the scheme about elevation CAD system based on network is proposed. Besides, this paper programs the general structure of this CAD system.By the thorough analysis of the rendering progress and demands about elevation, this paper, using Visual C++, graphic drawing and database technology, implements the elevation CAD system. By using database storage the whole data information about elevation, meets the demand of information sharing and reuse.Comprehensive application geometry conversion technology of the two dimension graphs, this paper achieves graphs translation, rotation and mirror. Based on Windows print principle, adopt virtual printer technique, the system is complete for EPS format picture conserve.Because of the limitation for the object-relation database query technology about XML files currently, which make the whole data system performance degradation, a new method to solve this problem is supplied in this paper.This paper realizes the elevation CAD system by choosing VC++ as development platform, comprehensive application of graphic transformation technology, XML and database technology and network technology. The elevation CAD system's character includes centralized storage based on network, drawing data exchange and so on. Compare with other elevation CAD system, this system has advantage for convenient operation and drawing speed. |
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