基于改进Qsplat算法的三维动态积云模拟研究

尽管人们对云模拟进行了大量研究，但是现有的云模拟算法很难在保证实时性的情况下得到真实感较强的云图形。针对这个问题，提出一种结合Qsplat算法与IFS算法的粒子系统的积云模拟方法，并考虑了积云的结构特点。首先，基于Qsplat算法的细节层次树型结构建立树型结构粒子系统，加速粒子系统搜索速度；然后，对距离视点较近的粒子使用IFS迭代函数系统算法增加层次包围球树的层次以丰富云体局部细节来建立云的外形；最后，使用球形图元映射二维纹理进行云的绘制。最终实现了三维动态积云的快速实时模拟。实验结果表明，该方法能够快速地生成实时三维动态积云图形，图形真实感强。

Research on three-dimensional dynamic cumulus simulation based on improved Qsplat

Although people have done a lot of research on cloud simulation, the existing cloud simulation algorithm can hardly obtain the cloud image with strong realism while ensuring the real-time performance. According to this problem, this paper proposes a cumulus-based simulation method for particle systems that combine Qsplat with IFS. First, build a tree-structured particle system based on the detail-level tree structure of Qsplat for speeding up particle system search speed. Then, for these particles which closer to the viewpoint , used the iterative function system algorithm to increase the level of enclosing the ball tree to enrich the local detail of the cloud to establish the shape of the cloud. Finally, Finally, rendered the cloud by using two-dimensional texture mapping of spherical entities, which realizes the fast real-time simulation of dynamic cumulus. The experimental results show that the method can generate real-time three-dimensional dynamic cumulus images quickly.