近年来，基于位置的模拟技术发展迅速，可以将其应用于交错球体的成型，从而制作泡沫。然而，也有其他的可能性。在本教程中，Manuel将向您展示如何使用一个analytical操作器，通过变形相交点，将相交点从密集的球体包裹中移除。它甚至比PBD更快，并且可以在没有任何模拟的情况下使用。本视频将介绍如何实现该设置。

As position based simulation techniques are very fast theses days, it is possible to use them to conform intersecting spheres to each other, to model foam. Nevertheless there are other possibilities, too. In this tutorial, Manuel shows you how to come up with an analytical operator that removes the intersections from a dense sphere packing by deforming the intersecting points. This is even faster than PBD and can be used without any simulation at all. The video deals with implementing the setup. The particle effect from the demo is included in the hip file though.