OpenGL图形渲染技术在PKPM-SAUSAGE非线性分析软件中的应用

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英文篇名：Application of Open GL Graphics Rendering Technology in the Nonlinear Analysis Software of PKPM-SAUSAGE 作者：乔保娟 ; 李志山 ; 刘春明 ; 侯晓武 ; 杨志勇 英文作者：Qiao Baojuan;Li Zhishan;Liu Chunming;Hou Xiaowu;Yang Zhiyong;China Academy of Building Research;Earthquake Engineering Research & Test Center of Guangzhou University; 关键词：OpenGL ; 建筑结构 ; 三维模型实时显示 ; 着色器编程 ; PKPM-SAUSAGE软件 英文关键词：Open GL;;Building Structure;;3D Model Real-time Display;;Shader Programming;;PKPM-SAUSAGE 中文刊名：TMJZ 英文刊名：Journal of Information Technology in Civil Engineering and Architecture 机构：中国建筑科学研究院;广州大学广东省地震工程与应用技术重点实验室; 出版日期：2015-10-15 出版单位：土木建筑工程信息技术 年：2015 期：v.7;No.31 基金：国家科技支撑计划课题(2014BAH25F02);; 教育部创新团队(IRT13057) 语种：中文; 页：TMJZ201505003 页数：6 CN：05 ISSN：11-5823/TU 分类号：17-22

摘要

通过对目前比较常用的GDI绘图和OpenGL绘图进行比较分析,显示了用OpenGL开发的三维有限元图形系统具有的速度快、绘图功能强、捕捉方便、视觉效果好等优越性。介绍了PKPM-SAUSAGE软件三维模型绘图流程,凹多边形网格化显示技术,背面剔除及alpha混合,实时旋转、平移、缩放算法和高效的捕捉算法,以及后处理结果平滑显示技术和着色器编程颜色修正技术。最后通过工程实例验证了PKPM-SAUSAGE软件OpenGL图形显示、旋转、平移、缩放及捕捉的高效性。
        In this paper,the superiorities of 3D finite element graphics system developed by Open GL,such as high speed,powerful drawing function,convenient selection and feedback and nice visual effect are demonsrated through the comparison between GDI and Open GL,which are both popular in graphics system at present. The paper also introduces drawing process of 3D model by Open GL,display technology of concave polygon,back face culling and alpha blending,real-time rotation,translation,scaling,and efficient capture algorithm of PKPM-SAUSAGE software as well as the results display smoothing technology and color correction technology by shader programming in post-processing. Finally,the efficiency of Open GL graphics display,rotation,translation,scaling and capture in PKPM-SAUSAGE software is verified by practical engineering examples.

引文

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