基于连续细节层次的地表模型实时绘制算法

研究地表模型的实时绘制,提高绘制速度及可信度。采用点到平均平面的误差度量和基于渐进网格的动态简化方法,使简化可随视点参数而动态变化。

An Algorithm for Real-Time Rendering of Terrain Surface Based on Continuous Level of Detail

To investigate real-timerendering of terrain surface, improve the speed of rendering and the fidelity ofsimplification, the algorithm taking the distance from vertex to average plane as theerror metric and progressive meshes based dynamic simplification was used, which providedview-dependent simplification of the model. The use of triangle strips and quickly cullingfaces outside the view frustum also contributed to fast rendering of terrain surface. On aP　Ⅱ　300 machine the algorithm achieved a speed of 71ms per frame, and the renderingquality could be accepted. The error metric based on distance from vertex to average planecan produce high fidelity of dynamic simplification, and reduce the complex computationwhen rendering.