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Adaptive LOD Representation of Terrain Model Based on Quad-tree

机译：基于四边形的地形模型的自适应LOD表示

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Many applications require real-time rendering while ensuring the accuracy of the terrain model. In response to this problem, a lot of research has been conducted in the academic community. Based on previous studies, this paper studies the LOD representation of a regular terrain scene based on a quad-tree, and proposes an adaptive LOD representation method. This method has two advantages: (1) When the quad-tree is used to represent the terrain scene, it is determined whether the quad-tree node needs to be further subdivided according to the number of triangles in the patch. By parameterizing the indicator, it realized the adaptive terrain storage structure; (2) LOD is only performed for the scene within the viewing cone, and the subdivision is mainly based on the viewpoint distance, and the relationship between the subdivision level and the rendering area is quantified. The experimental results show that when the drawing scene is large, the algorithm can greatly reduce the amount of calculation, improve the rendering efficiency of the terrain model, and ensure a good experience of the entire scene.
机译：许多应用需要实时渲染，同时确保地形模型的准确性。为应对这个问题，在学术界进行了大量研究。基于先前的研究，本文研究了基于四边形的常规地形场景的LOD表示，并提出了一种自适应LOD表示方法。该方法具有两个优点：（1）当Quad-Tree用于表示地形场景时，确定是否需要根据修补程序中的三角形的数量进一步细分Quad-Tree节点。通过参数化指示器，它实现了自适应地形存储结构; （2）仅针对观看锥内的场景执行LOD，并且细分主要基于视点距离，并且可以量化细分级别与渲染区域之间的关系。实验结果表明，当绘图场景大时，算法可以大大减少计算量，提高地形模型的渲染效率，并确保整个场景的良好体验。

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