ROAM动态地形渲染算法研究

三维真实感地形的生成一直是计算机图形学领域中关注的焦点课题 ,而基于层次细节的实时优化自适应网格动态地形渲染算法凭借其诸多的优点在军事仿真、GIS系统、VR系统、数字地球以及视频游戏等各个领域得到了广泛的运用。目前三维地形渲染技术主要包括体素渲染和层次细节渲染 ,该文在比较了这两种渲染方法的优缺点后 ,论述了基于后者的实时优化自适应网格算法的优势所在 ,详尽地剖析了其算法思想 ,并给出了该算法的一个具体的实现。

Research on Dynamic Terrain Render with ROAM

Three dimensions terrain render is a hot topic in the field of computer graphics. The ROAM(Real-time Optimally Adapting Meshes) algorithm of dynamic terrain render based on LOD(Level of Detail)has been widely used in military simulations, GIS systems, VR systems, digital earth, and video games, etc. Recently, the techniques of the three dimensions terrain render mainly include Voxel(Volumetric Pixel)and LOD. In this paper, these two popular techniques are compared, the advantages of the ROAM algorithm based on the latter are discussed, and the idea of the algorithm is analyzed. Finally, an example of the algorithm is presented.