期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII Part B5
页码：693-698
出版社：Copernicus Publications
摘要：Terrain rendering is an important factor in representation of virtual scene. If terrains are large and detailed, there will be huge amount of data, so it is necessary to reduce the complexity of the rendered scene in real-time on mobile device. This paper proposes a multi-resolution technique to simplify the scenes and improve the speed of terrains rendering. Firstly, the full terrain height-field is divided into regular tiles, and then the appropriate level of detail is computed and generated dynamically, allowing for smooth changes of resolution across area of the surface. Each visible tile is then rendered using a computed triangle strip in an adaptive way according to viewpoint. The method is different from the triangle-based LOD algorithms and is optimized for modern to minimize CPU usage during rendering. The key of the technique is to develop an adaptive LOD framework that can optimally feed the graphic pipeline. At last, this paper also proposes a method of removing cracks on the meshes boundary
关键词：Terrain rendering; Multi-resolution; Level of detail; Quad-tree; Adaptive rendering; Mobile device
