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Arthas007

Any real life examples of these "hero shots"?(most representative)

keenan

@Arthas007 The clip in the bottom-right comes from the movie Poseidon which was one of the earlier movies to use large-scale fluid simulation for a pivotal moment in the movie (a ship capsized by a giant wave). This shot used the PhysBAM library developed by Ron Fedkiw's group at Stanford; you can read about it here.

ceviri

If this is so expensive how do they compute things (like hair, which was given as an examlpe earlier) which will need to be simulated in almost every scene?

keenan

@ceviri Computers got faster; algorithms got better...

bcagan

I know Wave Race 64 (https://www.youtube.com/watch?v=Ne1vcHhRZyM) was an early example of real time attempts to do fluid simulation (at least in a game). How did these earlier examples compare to more accurate physically based simulations, in terms of implementation?

keenan

@bcagan A lot of hacks people used in the early days of computer graphics were still essentially rooted in some good observation about what phenomena are visually important. Often these "hacks" get revisited from a more principled perspective, since they are still good computational techniques. For instance, Chris Wojtan's group has done some work that could be considered the spiritual successor to these early tricks---but from a much more physically-based point of view:

http://pub.ist.ac.at/group_wojtan/projects/2015_Jeschke_WWAvWPI/index.html

http://visualcomputing.ist.ac.at/publications/2019/FundamentalSolutionForWaterWave/

http://visualcomputing.ist.ac.at/publications/2020/MPWWBa/