| 体云的光照模型及其算法实现 |
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| 引用本文： | 胡香,游雄,武玉国.体云的光照模型及其算法实现[J].测绘科学技术学报,2006,23(3):205-207. |
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| 作者姓名： | 胡香 游雄 武玉国 |
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| 作者单位： | 1. 69028部队,新疆,乌鲁木齐,830006;信息工程大学,测绘学院,河南,郑州,450052
2. 信息工程大学,测绘学院,河南,郑州,450052 |
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| 摘 要： | 云的模拟是户外场景仿真的重要内容,由于受速度的限制,多采用BOX或DOME等建模方法,但效果不够逼真,且不能穿行.体云的模拟效果逼真,但交互速度慢.文中讨论了体云模拟的基本原理及如何利用云的多向前方散射的特性来建立体云的光照模型,该模型效果逼真,与真云一样具有银色的边缘.给出了一个预处理与实时计算相结合的算法,该算法可以利用硬件图形卡的特性,因而模拟速度较快,可以满足交互式实时模拟的需要.
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| 关 键 词： | 体云 光照模型 多向前方散射 光照模型 算法实现 Realization Algorithm Clouds Static Model 实时模拟 交互式 图形卡 硬件 结合 实时计算 预处理 边缘 立体 特性 散射 利用 基本原理 |
| 文章编号： | 1673-6338（2006）03-0205-03 |
| 收稿时间： | 2006-01-01 |
| 修稿时间： | 2006-03-09 |
Radiometry Model of Static Volumetric Clouds and Its Algorithm Realization |
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| HU Xiang,YOU Xiong,WU Yu-guo.Radiometry Model of Static Volumetric Clouds and Its Algorithm Realization[J].Journal of Zhengzhou Institute of Surveying and Mapping,2006,23(3):205-207. |
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| Authors: | HU Xiang YOU Xiong WU Yu-guo |
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| Institution: | 1. 69028 Troops, Wulumuqi 830006, China; 2 .Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 450052 ,China |
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| Abstract: | Cloud simulation plays an important part in outdoors simulation. But in fact, it is not widely used just because of lower speed. To balance between real-time rendering and higher fidelity, BOX or DOME modeling method is always used in cloud simulation, which is neither vivid nor can pass through. There is another method to be chosen, that is, volumetric cloud. But unfortunately, it has the same disadvantages. To dealing with these problems, this paper discusses how to create a radiometry model for volumetric cloud simulation, by virtual of multiple forward light scattering, This model is so vivid that it even can provide argent cloud edges. In addition, an algorithm is given, integrating preprocessing and real-time computing. This algorithm makes full use of graphics hardwares, hence it can offer higher rendering speed and better real-time interactions. |
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| Keywords: | volumetric clouds radiometry model multiple forward light scattering |
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