YOU. Tell me everything you know about building a physics engine for fluid simulation.

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▶Anonymous 06/18/18 (Mon) 03:26:22 No.931653>>931663 >>931699 >>933261 >>934496 >>934497 [Watch Thread][Show All Posts]

YOU.

Tell me everything you know about building a physics engine for fluid simulation.

▶Anonymous 06/18/18 (Mon) 03:32:23 No.931655

quaternions

▶Anonymous 06/18/18 (Mon) 04:07:39 No.931662>>931663

Y'all niggers don't even Navier--Stokes

>>931656

>nigga

>>>/reddit//

▶Anonymous 06/18/18 (Mon) 04:10:31 No.931663

>>931653 (OP)

It's just solving PDEs, particularly Navier-Stokes >>931662, but since that doesn't have analytical solutions, it requires numerical methods to find approximations, and according wikipedia, finite volume methods are commonly used

https://en.wikipedia.org/wiki/Computational_fluid_dynamics

https://en.wikipedia.org/wiki/Finite_volume_method

▶Anonymous 06/18/18 (Mon) 04:20:26 No.931665>>931667

I know it's an unsolved problem. We can't even get realistic simulations for all fluids yet (we're actually getting kind of close now).

▶Anonymous 06/18/18 (Mon) 04:24:47 No.931667>>931668

>>931665

They still can't get hypersonic flight working, so I'm guessing their simulations aren't very accurate if they think their x-planes will work and they don't.

▶Anonymous 06/18/18 (Mon) 04:25:56 No.931668

>>931667

Although that probably involves issues simulating combustion, so those simulations would require fluid dynamics and molecular dynamics combined.

▶Anonymous 06/18/18 (Mon) 04:44:35 No.931673>>931735

yall niggas dont even know about Texture Distortion

https://catlikecoding.com/unity/tutorials/flow/texture-distortion/

▶Anonymous 06/18/18 (Mon) 04:59:34 No.931677

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>>931676

I should have filed this question under Tech Questions General #25 - Subsection QTDDTOT #5402 - Subsection Simulations #3

▶Anonymous 06/18/18 (Mon) 06:19:50 No.931699

>>931653 (OP)

Sure but first I'll need to see some cuts. Make them deep.

▶[k00l]shamoanjac!!v.CX2tveU. 06/18/18 (Mon) 07:00:26 No.931723

I've read you can use cellular automaton-based approaches

▶Anonymous 06/18/18 (Mon) 07:39:04 No.931734

If it's something that doesn't need actual flow and volume simulation (eg. just going for visuals), don't do it.

Just pre-render extremely high quality animated textures instead.

For example (pre-rendered waves):

https://www.youtube.com/watch?v=L36orF8rC-M

Which is from:

https://forum.unity.com/threads/water-system-based-on-baked-fluid-simulation.504291/

▶Anonymous 06/18/18 (Mon) 07:42:52 No.931735

>>931673

That doesn't look good though.

Can get better results with some hand-made textures and subtle blending/displacement layers.

▶Anonymous 06/19/18 (Tue) 18:36:06 No.932288

Something something voxels something.

Fuck I donno. What do you know?

▶Anonymous 06/21/18 (Thu) 17:01:24 No.933261

>>931653 (OP)

Particle Mesh Ewald

▶Anonymous 06/24/18 (Sun) 11:57:35 No.934489

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Bump.

What are some new features that one could fundamentally implement in a physics engine in order to increase efficiency where other physics engines are too far in development to correct now?

For example, is there a particular way of representing objects or storing them that has superseded efficiency of prior implementations?

▶Anonymous 06/24/18 (Sun) 13:12:36 No.934496>>934508 >>934524

>>931653 (OP)

Simulate n balls with radius m where n approaches infinity and m approaches 0.

▶Anonymous 06/24/18 (Sun) 13:17:57 No.934497>>934507

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