Скачать или смотреть Floating Sandbox 1.16.3 - Aerodynamics I

Teaser of the new aerodynamics simulation in Floating Sandbox 1.16.3.

In the upcoming version of Floating Sandbox we have finally reconciled - and elegantly at that, we'd say - the underwater world with the above-water world.

Earlier versions of Floating Sandbox, in fact, had two completely distinct physical "regimes". If a particle was underwater, it would have been subject to an "underwater regime", consisting of forces such as buoyancy, drag, and, as of very recently, hydrodynamics; on the other hand, if a particle was not underwater, then it would have been subject to the "above-water regime" - with forces such as wind and air buoyancy. This completely artificial dichotomy was the result of isolated, incremental improvements over the original codebase from 2018, and carried with it some obvious nasty side-effects such as discontinuities at the water-air interface, which would translate into structural instabilities under specific conditions.

We have now got rid of this nasty dichotomy, after embracing the principle that "nature abhors discontinuities". The above-water and underwater regimes are now a full continuum, gradually turning into each other (read: interpolating) in the neighborhood of the water-air interface. What goes underwater also goes above-water now, albeit with different magnitudes. So for example as a particle penetrates water, air buoyancy gradually turns into water buoyancy, air friction gradually turns into water fraction, and air pressure drag (aerodynamics) gradually turns into water pressure drag (hydrodynamics).