In these animations, we have complex 3D geometry, and the objective is to change these geometries in a way that remains physically correct even in the presence of complex cut surfaces.

在这些动画中，我们有一些复杂的3D几何模型，而我们的目标是改变这些几何形状，使它们的形状在复杂的切割面下仍然保持物理上准确性。