三维地形仿真中矢量数据的精确高效绘制方法研究  

Rendering vector data over 3D terrain based on stencil shadow volume

作　　者：盖素丽[1,2] 王娜[3] 

机构地区：[1]河北省应用数学研究所,河北石家庄050081 [2]河北工业大学计算机科学与软件学院,天津300130 [3]河北省科学院,河北石家庄050081

出　　处：《河北省科学院学报》2008年第3期20-23,53,共5页Journal of The Hebei Academy of Sciences

摘　　要：提出了一种基于模板阴影体算法的矢量数据绘制方法,实现了矢量数据在三维场景中的高质量实时叠加显示。并对其中的关键技术进行了详细论述,最后通过实验验证了该方法的有效性。该方法基于屏幕空间,具有像素级的绘制精度;而且不受地形几何数据的约束,其执行效率与地形数据的复杂度无关,仅取决于矢量数据本身的复杂度。A method of rendering vector data over 3D terrain, which is based on the stencil shadow volume algorithm has been presented. The high-quality real-time overlay of vector data on virtual landscapes has been realized. Since this method is a screen-space algorithm, it is per-pixel exact and does not suffer from aliasing artifacts like texture-based techniques. In addition, the method is independent of the underlying terrain geometry, its performance does not Keywords depend on the complexity of the datasets, but only on the complexity of the vector data.

关 键 词：模板测试 阴影体 矢量数据多面体 矢量数据绘制 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论]