|PhysXInfo seems to have solved one of the tougher problems in computer graphics - the appearance of realistic-looking water in motion. Their new demonstration of Position Based Dynamics certainly looks better than a bunch of triangles.|
PhysXInfo has the details how it works:
Position Based Fluids is a way of simulating liquids using Position Based Dynamics (PBD), the same framework that is utilized for cloth and deformables simulation in PhysX SDK. Because PBD uses an iterative solver, it can maintain incompressibility more efficiently than traditional SPH fluid solvers. It also has an artificial pressure term which improves particle distribution and creates nice surface tension-like effects (note the filaments in the splashes). Finally, vorticity confinement is used to allow the user to inject energy back to the fluid.
In both of these cases, the simulations are not the best on earth, but are a sign of what the newest video game systems like the new XBox will be capable of. Clearly as virtual reality becomes an increasing possibility with lighter and more powerful immersion technology, the graphic environments we will be experiencing will be very close to attaining a hyper-real look as well.
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