Fast rendering of massive textured terrain data |
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引用本文: | DAI Chen-guang DENG Xue-qing. Fast rendering of massive textured terrain data[J]. 通讯和计算机, 2007, 4(3): 63-68 |
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作者姓名: | DAI Chen-guang DENG Xue-qing |
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作者单位: | Department of Remote Sensing Information Engineering, Zhengzhou Institute of Surveying and Mapping Zhengzhou 450052, China |
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摘 要: |
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关 键 词: | 块状织纹地形数据 快速渲染 线性四叉树 实时可视化 数据缓冲器 |
Fast rendering of massive textured terrain data |
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Abstract: | This paper proposes a framework based on tile-pyramid model and linear quadtree tile-index, which enables the real-time rendering of out-of-core terrain data sets while guaranteeing geometric and texture accuracy. The Digital Elevation Model pyramid and the orthophoto pyramid are created in advance and the quadtree is used for constructing tile-index and managing data tiles. To achieve real-time loading of terrain dataset, the view frustum culling technology and the target-tiles searching algorithm based on resolution-testing and the tile-request prediction mechanism are used. While rendering the terrain tiles, the dynamic bintree triangulation is used. Experimental results show that based on the current personal computer, this framework can achieve good performance for real-time rendering of massive terrain dataset whose size is unlimited. |
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Keywords: | tile-pyramid visualization multi-resolution buffer linear quadtree real-time model level of details data |
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