| 基于DirectX的多分辨率动态DEM构网算法研究 |
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| 引用本文： | 王珂珂,张立朝,潘贞,王青山,张世全.基于DirectX的多分辨率动态DEM构网算法研究[J].北京测绘,2008(2):5-8. |
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| 作者姓名： | 王珂珂 张立朝 潘贞 王青山 张世全 |
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| 作者单位： | 1. 信息工程大学,测绘学院,河南郑州,450052
2. 郑州高新区管委会,河南郑州,450001 |
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| 摘 要： | 提出了一种基于DirectX和LOD的DEM动态构网算法。该算法使用四叉数和LOD层次模型技术来解决地形数据的动态简化和动态构网,有效地简化了复杂的地形数据,在满足真实的前提下,尽可能多地删除冗余三角形。生成的三维地形的渲染速度达到了20到30帧,基本上满足了实时显示的要求。
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| 关 键 词： | LOD DEM 四叉树 动态构网 实时渲染 |
| 修稿时间： | 2008年2月23日 |
Research on Multiresolution Dynamic Creating Networks Algorithm of DEM based on DirectX |
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| WANG Ke-ke,ZHANG Li-chao,PAN Zhen,WANG Qing-shan,ZHANG Shi-quan.Research on Multiresolution Dynamic Creating Networks Algorithm of DEM based on DirectX[J].Beijing Surveying and Mapping,2008(2):5-8. |
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| Authors: | WANG Ke-ke ZHANG Li-chao PAN Zhen WANG Qing-shan ZHANG Shi-quan |
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| Institution: | WANG Ke-ke,ZHANG Li-chao, PAN Zhen,WANG Qing-shan,ZHANG Shi-quan( 1. Institute of Surveying and Mapping, Information Engineering University, Zhengzhou, Henan, 450052; 2. First the Management Committee High ＆ New Technology Industrial Development Zone of Zhengzhou, Zhengzhou, Henan, 450001) |
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| Abstract: | This paper puts forward an algorithm to dynamic create networks for DEM basing on DirectX and LOD.This algorithm uses the quadtrees to save DEM data and uses LOD to simplify the triangles dynamically and create networks dynamically for DEM.This algorithm can simplify the complicated terrain data effectively and it deletes and simplifies the redundant triangles basing on satisfying the need of reality.According to the tests,it is shown that the screen created by this algorithm can display in real time. |
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| Keywords: | LOD DEM |
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