关键词: 三维地形, 裂缝消除, 基于视点, 纹理映射

Abstract: A seamless terrain rendering algorithm combined with changed viewpoint is proposed to solve the problem that the conventional multi-resolution terrain rendering methods are time-consuming and having strong tile level constraint. Firstly, a rough LOD model based on precision is generated. Then fine mesh models are generated by using the texture mapping technique. Finally, it adjusts the vertex position dynamically according to the viewpoint to eliminate the T-shaped crack caused by the level detail transition. In addition, it uses CPU-GPU to work together to transfer the batch network and rendering work from CPU to GPU, which improves the processing speed of the whole system. The experimental results prove that the proposed method can effectively eliminate terrain cracks and ensure a smooth transition of the mesh.

Key words: 3D terrain, crack elimination, based on viewpoint, texture mapping