提出了一種基于了“宏三角形”網格的地形漫游算法(Hyper-ROAM)。該算法可以充分利用現代GPU的硬件特點，實現大規模地形數據的實時連續細節層次渲染。通過改變該算法中的宏三角形內部復雜度，傳統的ROAM算法成為了Hyper-ROAM算法的一個特例。實驗證明ROAM算法并非是Hyper-ROAM算法所有特例中效率最高的一種，適當選擇宏三角形的秩，可以大大提高渲染效率。
關 鍵 詞 連續細節層次; 宏三角形; ROAM算法; 實時渲染; 地形渲染

Abstract In this paper, a terrain render algorithm is developed based on marco-triangle conception, which called Hyper real-time optimally adapting meshes algorithm (Hyper-ROAM). The algorithm can take full advantage of the hardware features of modern GPU, realizing large-scale terrain for real-time continuous level of detail rendering. By adjusting the complexity of macro-triangle, the traditional ROAM becomes a special case of Hyper-ROAM algorithm space. Our tests shown that the traditional ROAM is usually not the best case. It is more efficient to select a proper complexity of the marco-triangles.
Key words continuous lod; marco-triangle; real-time optimally adapting meshes algorithm; real-time rendering; terrain rendering