欧拉模型中多烟雾自由融合实时仿真算法

Research on Real-Time Simulation Algorithm for Multi-smoke Freely Fusion with Eulerian Model

为了弥补传统烟雾模拟在一个力场作用下运动态势的单调性,提出一种基于欧拉模型的多烟雾自由融合实时仿真算法.首先根据场景和烟源位置等初始条件提出域划分算法,从结构上解决烟雾自由融合问题;然后以动量守恒与能量守恒定律为依据,采用局部控制与整体调整相结合的方式解决多烟雾融合时边界的不连续问题;并针对多烟雾的密度颜色绘制问题,提出了多种颜色融合策略来表现烟雾的绘制细节;最后利用GPU并行计算方法和D3D技术提高仿真效率,获得多个烟雾自由融合过程的实时绘制效果.实验结果表明,该模型能够快速逼真地表现出烟雾自由融合的过程.

To address the limitation of using single force field in the traditional smoke simulation method, wepropose a real-time simulation algorithm for the multi-smoke freely fusion process with an Eulerian model. First,we present a domain decomposition algorithm on the initial setting of the scene and the smoke source positionwhich solves the problem in the structural layer. Second, based on the law of conservation of momentum and energy,we combine the method of the local control with the integral adjustment to solve the discontinuous boundaryproblems. Third, we utilize a multi-color tactic to exhibit the smoke details on the density rendering issues. Finally,we improve the simulation efficiency with the GPU parallel computing and D3D techniques to get areal-time rendering effect. The experiments demonstrate the proposed model simulates the smoke freely fusionresult in an efficient and vivid way.