| 基于层次块的大地形实时细节合成及渲染算法 |
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| 引用本文： | 张燕燕,黄其涛,韩俊伟.基于层次块的大地形实时细节合成及渲染算法[J].吉林大学学报(工学版),2009(Z2). |
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| 作者姓名： | 张燕燕 黄其涛 韩俊伟 |
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| 作者单位： | 哈尔滨工业大学机电工程学院; |
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| 基金项目： | 教育部新世纪优秀人才支持计划项目(NCET_04_0325) |
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| 摘 要： | 为解决渲染真实大地形场景面临的数据获取困难问题,减轻海量地形数据存储与调度的压力,提出了基于层次块实时生成可控的地形细节,完成地形渲染的新方法。采用了层次块结构组织采样数据。给出了基于层次块生成可控细节的方法,使用块网格细分增加采样点,提出了基于Perlin噪声的可控多重分形算法计算细节,保证了生成的细节受真实采样点属性控制。采用统一的细节选择标准完成了细节合成与LOD方法集成,其结果与原始地形块共同构成了动静结合的双层自适应层次结构,实现了视相关的大地形渲染。面向GPU实现了实时合成算法。实验分析表明了该方法能够利用有限的真实地形数据实时产生与实际地形特征相近的细节,完成大地形渲染。
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| 关 键 词： | 计算机应用 大地形可视化算法 实时细节合成 层次细节模型 多重分形 GPU算法 |
Real-time detail synthesis and rendering of large terrain based on data chunk |
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| ZHANG Yan-yan,HUANG Qi-tao,HAN Jun-wei.Real-time detail synthesis and rendering of large terrain based on data chunk[J].Journal of Jilin University:Eng and Technol Ed,2009(Z2). |
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| Authors: | ZHANG Yan-yan HUANG Qi-tao HAN Jun-wei |
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| Affiliation: | School of Mechatronics Engineering;Harbin Institute of Technology;Harbin 150001;China |
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| Abstract: | A new method for real-time controllable detail synthesis and rendering of large terrain based on data chunk was proposed in order to overcome the difficulty in accessing the dataset for rendering the real large terrain,and reduce data storage and management pressure.Chunk hiberarchy is adopted to organize samples,and the controllable detail synthesis presented is chunk-based.Chunk subdivision is used to generate new samples and a Perlin-noise based controllable multifractal algorithm is given to compute det... |
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| Keywords: | computer application terrain rendering real-time detail synthesis level of details multifractal GPU algorithms |
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