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该文提出一种适合大规模地形实时绘制的简单高效的LOD简化算法。该算法使用一种紧凑有效的规则网格表示方法,优化网格节点的数目,减少可视化过程中的计算量,降低额外内存开销。探讨该算法相关的数据组织、视域裁剪、LOD层次选择、裂缝消除、三角形化等关键问题。实验结果表明,该算法实现简单,内存开销较少,CPU耗费小,对图形卡要求低,能够在普通机器上实现大规模地形的实时漫游。 更多还原

【Abstract】 Large scale terrain roaming has been widely used in games, simulation, virtual reality, etc.There terrain scenes may contain thousands of polygons and although modern graphics cards allow the display of many thousands of polygons at real-time framerates, many applications have models with geometric complexities that, by far, exceed the real-time capabilities.In order to reduce the number of polygons to be rendered and thus achieve real-time framerate many research papers have dealt with differen...