内河船舶模拟器中大尺度河流实时绘制

Real-time Rendering of Large-scale River in Inland River Ship Simulator

为提升现有内河船舶模拟器中河流仿真的真实感,提出一种适用于内河船舶模拟器中大尺度河流绘制方法。该方法通过引入流函数构建河流速度场,并利用泊松盘分布算法控制河流速度场空间分布,可有效地平衡效率与河流表面绘制效果;利用GPU的并行性和可编程性完成河流可视化。实验结果证明:构建的河流流体速度场能够很好地体现河流流动特性,并且泊松盘分布算法能良好地控制河流表面。基于GPU能够实现大尺度河流实时绘制,并提升内河船舶模拟器中河流视景的环境真实感。

To improve the reality of river visual in inland river ship simulator, a method of rendering large scale river which could be applied for inland river ship simulator was proposed. The river flowing field was built though the conception of stream function, and the algorithm of Poisson disk sampling was used to control the distribution of river flowing field. This could balance the relationship between efficiency and effect of river surface. The parallelism and programmability of GPU was adopt to render river surface. The results show the river flowing field generated by algorithm of stream function can reflect the mobility of river, and the algorithm of Poisson disk sampling can control river surface efficiently. GPU is used for rendering of river that can realize real time rendering of large scale river, and improve the reality of environment of inland river ship simulator.