| Hybrid Level of Detail Algorithm for Real-Time Rendering of Large-Scale Terrain |
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| 作者姓名： | 杜剑侠 李凤霞 战守义 |
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| 作者单位： | School of Computer Science and Technology Beijing Institute of Technology Beijing 100081 China，School of Computer Science and Technology Beijing Institute of Technology Beijing 100081 China，School of Computer Science and Technology Beijing Institute of Technology Beijing 100081 China |
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| 基金项目： | the Ministerial Level Advanced Research Foundation（413040402） |
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| 摘 要： | Real-ti me rendering of terrain model is one of themost difficult tasks of computer graphics,especiallywhen the scale of a terrain model is very large.LODis ani mportant techniquetoresolvethis problem.Ac-cording to the evolution,there are two kinds ofLOD:…
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| 关 键 词： | 细节算法 地形绘制 离散LOD 计算机仿真 |
| 文章编号： | 1004-0579（2006）04-0416-04 |
| 收稿时间： | 2005-06-02 |
Hybrid Level of Detail Algorithm for Real-Time Rendering of Large-Scale Terrain |
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| DU Jian-xi,LI Feng-xia and ZHAN Shou-yi.Hybrid Level of Detail Algorithm for Real-Time Rendering of Large-Scale Terrain[J].Journal of Beijing Institute of Technology,2006,15(4):416-419. |
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| Authors: | DU Jian-xi LI Feng-xia and ZHAN Shou-yi |
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| Affiliation: | School of Computer Science and Technology, Beijing Institute of Technology, Beijing 100081, China;School of Computer Science and Technology, Beijing Institute of Technology, Beijing 100081, China;School of Computer Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | Hybrid level of detail (LOD) (HLOD) algorithm based on discrete LOD and continuous LOD is presented for real-time rendering of large-scale terrains. There are n HLOD models created off-line, which form a pyramid with n layers. Each of these models contains countless versions of the model at various levels of detail. When rendering, the corresponding models in some layer will be chosen. As the viewer's moves, either the continuous LOD algorithm will be applied to the selected models, or the visible models in another layer will be selected. An experiment on a triangular irregular network(TIN) terrain model was performed respectively using discrete LOD, continuous LOD and HLOD. The experimental results show that the HLOD algorithm exceeds the other two kinds of LOD in frame rate without reduction of terrain's fidelity. |
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| Keywords: | hybrid level of detail (HLOD) discrete level of detail continuous level of detail level of detail control |
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