PhysicsProject
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Details

Description

Physics simulation systems including rigid bodies, cloth, softbodies, smoke fluids and particles.

Developers

Bullet: @Erwin Coumans (erwin)
Rigid Body: @Sergej Reich (sergof)
Cloth: @Daniel Genrich (genscher)
Smoke: @Miika Hamalainen (miikah) @Daniel Genrich (genscher)
Fluids: @Daniel Genrich (genscher) @Nils Thuerey (n_t)
Particles: @Janne Karhu (jhk) @Lukas Toenne (lukastoenne)
Softbody: @Jens Ole Wund(bjornmose) (bjornmose)

Recent Activity

Tue, Jul 17

Christopher Anderssarian (Christopher_Anderssarian) added projects to T54889: Particle Hair: Physics, Rendering.
Tue, Jul 17, 10:30 PM · Rendering, Physics, BF Blender
Christopher Anderssarian (Christopher_Anderssarian) added projects to T53341: Weird bug with Particle Instance Modifier: Rendering, Physics, Modifiers.
Tue, Jul 17, 10:01 PM · Modifiers, Physics, Rendering, BF Blender
Christopher Anderssarian (Christopher_Anderssarian) added projects to T55460: Particle’s hair doesn’t update material dynamically, reflecting changes in the material: BF Blender, Physics.
Tue, Jul 17, 9:54 PM · Physics, BF Blender
Christopher Anderssarian (Christopher_Anderssarian) added a project to T55731: Blender particle hair crash: Physics.
Tue, Jul 17, 6:34 PM · Physics, BF Blender: 2.8

Mon, Jun 25

Sybren A. Stüvel (sybren) added a comment to T37578: Point Cache replacement based on Alembic.

Reading/writing cache files simultaneously should be as smooth as possible. I have to investigate the details of how Alembic files can be accessed more-or-less simultaneously, but generally it should follow a one writer / multiple readers model.

Mon, Jun 25, 11:15 AM · Alembic, Physics, BF Blender

Jun 13 2018

Philipp Oeser (lichtwerk) added a project to T55405: Interpolated hair curves sharp turns: Physics.
Jun 13 2018, 3:41 PM · Physics, BF Blender

Jun 11 2018

Philipp Oeser (lichtwerk) added a comment to T55433: Particle physics type: Keyed Bug.

Hm strange, saw a crash once here (when pind->kkey[1]->time wasnt accessible)
but cannot reproduce ever since...

Jun 11 2018, 12:43 PM · Physics, BF Blender
Leonardo (Crazy93) created T55433: Particle physics type: Keyed Bug.
Jun 11 2018, 8:15 AM · Physics, BF Blender

May 30 2018

Ludvik Koutny (rawalanche) added a comment to T55151: Smoke simulator uses Index Number parameter as file suffix making it impossible to parse frame order.

Hi, any news on this bug? It really makes it impossible to use Blender as generator of fluid simulations for use in other apps. This should be high priority, because all the work spent by someone to make Blender support VDB is negated by this unwise file naming. I mean if you are doing sims to be used in Blender, you can just use the default point cache. VDB makes sense mainly because of interoperability with other 3D packages, yet this interoperability is broken for exactly this reason :(

May 30 2018, 9:16 AM · Physics, BF Blender

May 29 2018

Philipp Oeser (lichtwerk) closed T54916: Fluid Simulator, **spilling Massive amounts of fluid from objects which move** as Archived.

Thanx for getting back [and for finding a workaround/solution]
I'll archive this then (though it is still not completely clear whether this is intended behaviour or not -- but report can always be reopened or found as reference)

May 29 2018, 3:29 PM · Physics, BF Blender

May 24 2018

Ludvik Koutny (rawalanche) added a comment to T55151: Smoke simulator uses Index Number parameter as file suffix making it impossible to parse frame order.

This is actually working as intended, so calling this "corrupted" is not really appropriate.
I agree though that flipping index and framenumber would probably have benefits in a pipeline involving other software.
This could certainly be done [would need to take care of reading both naming-conventions then...].

Dont think this is a bug [more of a TODO - if at all], but maybe @Brecht Van Lommel (brecht) or @Sybren A. Stüvel (sybren) have a comment?

May 24 2018, 10:49 AM · Physics, BF Blender
Philipp Oeser (lichtwerk) changed Type from Bug to To Do on T55151: Smoke simulator uses Index Number parameter as file suffix making it impossible to parse frame order.
May 24 2018, 10:44 AM · Physics, BF Blender
Philipp Oeser (lichtwerk) added a project to T55151: Smoke simulator uses Index Number parameter as file suffix making it impossible to parse frame order: Physics.

This is actually working as intended, so calling this "corrupted" is not really appropriate.
I agree though that flipping index and framenumber would probably have benefits in a pipeline involving other software.
This could certainly be done [would need to take care of reading both naming-conventions then...].

May 24 2018, 10:44 AM · Physics, BF Blender

May 18 2018

Philipp Oeser (lichtwerk) added a comment to T55105: Smoke Emission from particles is ignoring lattice deformer on the particles.

I'll look into Alembic separately

May 18 2018, 4:25 PM · Physics, BF Blender
Philipp Oeser (lichtwerk) added a project to T55105: Smoke Emission from particles is ignoring lattice deformer on the particles: Physics.
May 18 2018, 4:23 PM · Physics, BF Blender
Philipp Oeser (lichtwerk) closed D3396: Fix T55115: crash when iterating SmokeDomainSettings color_grid property through python.

commited rB5e7a21a5f549

May 18 2018, 3:11 PM · Physics, BF Blender
shaun (toxsickcity) added a comment to T54916: Fluid Simulator, **spilling Massive amounts of fluid from objects which move**.

I did solve this with majoy difficulty.

May 18 2018, 2:05 PM · Physics, BF Blender
Brecht Van Lommel (brecht) accepted D3396: Fix T55115: crash when iterating SmokeDomainSettings color_grid property through python.
May 18 2018, 1:54 PM · Physics, BF Blender
Philipp Oeser (lichtwerk) created D3396: Fix T55115: crash when iterating SmokeDomainSettings color_grid property through python.
May 18 2018, 1:02 PM · Physics, BF Blender

May 10 2018

shaun (toxsickcity) added a comment to T54916: Fluid Simulator, **spilling Massive amounts of fluid from objects which move**.

is this bug found? will it have a solution?

May 10 2018, 10:04 AM · Physics, BF Blender

May 2 2018

Philipp Oeser (lichtwerk) added a project to T54916: Fluid Simulator, **spilling Massive amounts of fluid from objects which move**: Physics.
May 2 2018, 12:00 PM · Physics, BF Blender

Apr 27 2018

Philipp Oeser (lichtwerk) claimed T54108: Child Of vertex group fails when controled by Particle System.

This doesnt seem to be related to a ParticleSystem in particular.
It just works well with object transformations on the target (same as your First Layer example), but not so well with object data transformations...

Apr 27 2018, 4:11 PM · Physics, Animation, BF Blender
Philipp Oeser (lichtwerk) changed Type from Bug to To Do on T53872: Hair, Particle Edit automatically mirrors guide strands.
Apr 27 2018, 2:35 PM · Physics, BF Blender
Philipp Oeser (lichtwerk) closed T53872: Hair, Particle Edit automatically mirrors guide strands as Archived.

Though this might be inconvenient, this seems to be by design (and not a bug) then.

Apr 27 2018, 2:35 PM · Physics, BF Blender
Philipp Oeser (lichtwerk) added a comment to T54108: Child Of vertex group fails when controled by Particle System.

OK, will have a look

Apr 27 2018, 10:32 AM · Physics, Animation, BF Blender
Serge Lyatin (SergeL) added a comment to T54108: Child Of vertex group fails when controled by Particle System.

Yeah, rotation sliding on Z is bothering me

Apr 27 2018, 10:00 AM · Physics, Animation, BF Blender
Philipp Oeser (lichtwerk) added a comment to T54108: Child Of vertex group fails when controled by Particle System.

Sorry this report hasnt been answered in quite a while.

Apr 27 2018, 9:50 AM · Physics, Animation, BF Blender

Apr 24 2018

Konstantin (Ko) added a reviewer for D3176: "Nearest only" option for the curve guide: Lukas Toenne (lukastoenne).

Lukas T. I just hope what this doesnt go in perpendicular with your work in hair_guides branch.

Apr 24 2018, 6:06 AM · BF Blender, Physics

Apr 23 2018

Yasuhiro Fujii (y-fujii) added a project to D3176: "Nearest only" option for the curve guide: BF Blender.
Apr 23 2018, 6:46 PM · BF Blender, Physics
Yasuhiro Fujii (y-fujii) created D3176: "Nearest only" option for the curve guide.
Apr 23 2018, 3:33 PM · BF Blender, Physics

Apr 4 2018

Philipp Oeser (lichtwerk) closed T54521: Self-collision cloth causing unrealistic physics as Invalid.

Your objects geometries have very long/thin faces which makes it harder/impossible for the simulation to end up being somewhat realistic (lack of edges to bend at).
So without going into details (you should be able to find plenty of tutorials online), you should already end up with something more pleasing by just adding a couple of edgeloops in your file like here:

Apr 4 2018, 2:30 PM · Physics, BF Blender
Philipp Oeser (lichtwerk) raised the priority of T54521: Self-collision cloth causing unrealistic physics from Incomplete to Needs Triage.

Ah, sorry, having a look now...

Apr 4 2018, 2:07 PM · Physics, BF Blender
Vinicius Fagundes (vinf100) added a comment to T54521: Self-collision cloth causing unrealistic physics.

I did, it is beside my graphics card version on the link "F2596406". I know, that's a weird place, I don't know why it's there. I just drag and dropped it.

Apr 4 2018, 2:04 PM · Physics, BF Blender
Philipp Oeser (lichtwerk) triaged T54521: Self-collision cloth causing unrealistic physics as Incomplete priority.

could you please upload your example file, so we can have a look?

Apr 4 2018, 1:57 PM · Physics, BF Blender
Vinicius Fagundes (vinf100) created T54521: Self-collision cloth causing unrealistic physics.
Apr 4 2018, 1:05 PM · Physics, BF Blender

Mar 1 2018

Sergey Sharybin (sergey) added a comment to T54175: First and second particle overlap when they shouldn't.

Is it possible to work around it using Python?

Mar 1 2018, 12:16 PM · Physics, BF Blender
Rumen Belev (syziph) added a comment to T54175: First and second particle overlap when they shouldn't.

Thanks Sergey!
You are right about new particles messing up old projects.
Is it possible to work around it using Python?

Mar 1 2018, 11:56 AM · Physics, BF Blender
Sergey Sharybin (sergey) closed T54175: First and second particle overlap when they shouldn't as Resolved.

Thanks for the report, but it was already fixed in rB35ee9ff.

Mar 1 2018, 11:44 AM · Physics, BF Blender

Feb 26 2018

Rumen Belev (syziph) created T54175: First and second particle overlap when they shouldn't.
Feb 26 2018, 2:31 PM · Physics, BF Blender

Feb 20 2018

Serge Lyatin (SergeL) created T54108: Child Of vertex group fails when controled by Particle System.
Feb 20 2018, 5:29 PM · Physics, Animation, BF Blender

Feb 8 2018

Belén Palacios (Nete123123) added a watcher for Physics: Belén Palacios (Nete123123).
Feb 8 2018, 2:24 PM

Jan 30 2018

Bastien Montagne (mont29) added a comment to T51214: Dynamic Paint Works Only in Viewport Render.

Ok, so now crash seems to have disappeared again. Issue with rendering remains though. :)

Jan 30 2018, 1:05 PM · Physics, BF Blender
Campbell Barton (campbellbarton) abandoned D2948: T50630: Fixed Windows fluid simulation with Unicode characters in path.

Committed modified patch rBb0af44fa4d7a2e134b315c49a4fbdf573f781004

Jan 30 2018, 6:38 AM · Physics, BF Blender
Campbell Barton (campbellbarton) closed T50630: fluid cache folder bug (cyrillic in path) as Resolved by committing rBb0af44fa4d7a: Fix T50630: Fluid fails on win32 w/ unicode paths.
Jan 30 2018, 4:30 AM · Platform: Windows, Physics, BF Blender

Jan 29 2018

João Esteves (Joao611) added a comment to D2948: T50630: Fixed Windows fluid simulation with Unicode characters in path.

I apologize for only getting back to you now. Your CMake definition of "LBM_GZIP_OPEN_FN" is not working and I'm not experienced enough with CMake to figure out a solution.

Jan 29 2018, 11:13 PM · Physics, BF Blender

Jan 23 2018

ronan ducluzeau (zeauro) added a comment to T53872: Hair, Particle Edit automatically mirrors guide strands.

I can confirm that enabling/disabling X-mirror in Edit mode enables/disables it for Particle Edit mode, too.
Particle Edit mode re-uses Edit mode tools to manipulate particles.

Jan 23 2018, 6:55 PM · Physics, BF Blender
Philipp Oeser (lichtwerk) added a comment to T53872: Hair, Particle Edit automatically mirrors guide strands.

Seems like the .blend is missing?

Jan 23 2018, 6:31 PM · Physics, BF Blender
adam inskip (adaminskip) created T53872: Hair, Particle Edit automatically mirrors guide strands.
Jan 23 2018, 6:24 PM · Physics, BF Blender

Jan 19 2018

Campbell Barton (campbellbarton) closed T53823: Enabling weight brush in particle edit mode of a hair particle system will cause a crash when entering an emitter system edit mode. as Resolved by committing rB368414efacc2: Fix T53823: Particle weight brush crash.
Jan 19 2018, 2:17 AM · Physics, BF Blender

Jan 18 2018

Philipp Oeser (lichtwerk) assigned T53823: Enabling weight brush in particle edit mode of a hair particle system will cause a crash when entering an emitter system edit mode. to Campbell Barton (campbellbarton).

Can confirm this, D3008: T53823: prevent crash prevents the crash, but maybe we should spend time making sure we only have the weight brush available for hair? (@Campbell Barton (campbellbarton) : I could have a look if this is worth the time...)

Jan 18 2018, 5:19 PM · Physics, BF Blender