884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

（同濟(jì)大學(xué)建筑工程系 上海 200092）
［提要］通過(guò)ObjectARX接口，采用Visual C++語(yǔ)言對(duì)AutoCAD進(jìn)行二次開(kāi)發(fā)，擴(kuò)展了AutoCAD的三維實(shí)體功能，在其中加入描述復(fù)雜構(gòu)件的幾何和結(jié)構(gòu)信息，并重載了自定義實(shí)體的顯示、布爾運(yùn)算和表面近似展開(kāi)等操作，從而解決了彎扭形構(gòu)件和彎扭變截面構(gòu)件的三維實(shí)體建模和施工圖繪制問(wèn)題。系統(tǒng)已成功地運(yùn)用于2008年北京奧運(yùn)會(huì)主體育場(chǎng)的實(shí)體建模和施工圖繪制。
［關(guān)鍵詞］ 彎扭構(gòu)件 實(shí)體建模 施工圖繪制
Manufacture Drawing Software System for Benttorsional Bar Based on 3D Solid Model/ Chang Zhiguo, Yang Huizhu, Zhang Qilin(Building Engineering Department, Tongji University, Shanghai 200092,China)
Abstract:A manufacture drawing system is developed in Visual C++ programming la
nguage by using the SDK of AutoCAD. The custom entity, which includes the geomet
rical and structural information of complex bar, and overloads virtual functions such as viewport draw, bool operate, and surface deploy, are developed to extend the 3D solid functions of AutoCAD. Therefore,  the problem of the 3D solid modeling and manufacture drawing for benttorsional bar can be solved effectively. The software system has been applied to construct the 3D solid model and manufacture drawings for the main stadium of the 2008 Beijing Olympic Games.
Keywords:benttorsional bar; 3D solid model; manufacture drawings