Liquid Layers Updates (n-body, sculpting, collisions)
New features in Liquid Layers: https://grantkot.com/ll
N-body, which is often used to simulate the motion of planets. To keep things somewhat fast, I compute the mass and center of mass for each occupied cell in the spatial hash and do the naive n squared algorithm.
Sculpt mode allows you to shape the world like clay and you can lock particles in place.
Collision functions for basic shapes like circles, rectangles and lines.