| 基于可见性预处理的地形模型视相关简化算法 |
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| 引用本文： | 蒲浩,宋占峰.基于可见性预处理的地形模型视相关简化算法[J].武汉大学学报(信息科学版),2005,30(7):636-639. |
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| 作者姓名： | 蒲浩 宋占峰 |
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| 作者单位： | 中南大学土建学院,长沙市韶山南路22号,410004 |
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| 基金项目： | 铁道部科技研究开发计划资助项目(铁建电(2001)11号)。 |
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| 摘 要： | 提出了一种基于可见性预处理的点删除简化算法。该算法针对海量地形数据,首先建立了高效的空间索引系统,利用这一索引系统快速完成了视锥截取、背面剔除和隐藏面消除等可见性测试,再对预处理后的网格模型依据顶点曲率大小进行点删除简化。实验表明,采用可见性预处理可大大提高绘制速度,并且绘制帧速率基本独立于模型的复杂度。
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| 关 键 词： | 模型简化 视相关简化 细节层次 交互渲染 |
| 文章编号： | 1671-8860(2005)07-0636-04 |
| 修稿时间： | 2005年4月29日 |
View-dependent Simplification Algorithm of Terrain Model Based on Visibility Preprocesssing |
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| Pu Hao,SONG Zhanfeng.View-dependent Simplification Algorithm of Terrain Model Based on Visibility Preprocesssing[J].Geomatics and Information Science of Wuhan University,2005,30(7):636-639. |
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| Authors: | Pu Hao SONG Zhanfeng |
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| Institution: | PU Hao1 SONG Zhanfeng1 |
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| Abstract: | This paper puts forward a vertex removal simplification algorithm based on visibility preprocessing. To deal with huge amounts of terrain data set,The space index system with high efficiency is created and applied to accelerate the visibility preprocessing including view-frustum culling,back-face culling and hiding-face culling. The model which had been preprocessed is simplified further by the vertex removal algorithm based on curvature. The experiments show that the visibility preprocess can accelerate the rendering to a great extent and the rendering velocity is independent of the model complexity. |
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| Keywords: | model simplification view-dependent simplification level-of-detail interactive |
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