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

Yesterday

Brecht Van Lommel (brecht) accepted D3619: Cloth: fix mistake in big matrix multiplication.
Fri, Aug 17, 2:16 PM · Physics
Luca Rood (LucaRood) created D3619: Cloth: fix mistake in big matrix multiplication.
Fri, Aug 17, 1:59 PM · Physics

Mon, Aug 13

Bastien Montagne (mont29) closed T56344: Crash when used Twist for Emitter type of Particles System as Resolved by committing rB844b40b0c174: Fix T56344: Crash when used Twist for Emitter type of Particles System..
Mon, Aug 13, 11:58 AM · Physics, BF Blender
Bastien Montagne (mont29) claimed T56344: Crash when used Twist for Emitter type of Particles System.
Mon, Aug 13, 11:57 AM · Physics, BF Blender
Bastien Montagne (mont29) added a comment to T56344: Crash when used Twist for Emitter type of Particles System.

Indeed… actually, not sure why those effects are available for emitter particles, most cannot work at all in that context and will just do nothing.

Mon, Aug 13, 11:56 AM · Physics, BF Blender
Yevgeny Makarov (jenkm) created T56344: Crash when used Twist for Emitter type of Particles System.
Mon, Aug 13, 8:15 AM · Physics, BF Blender

Sat, Aug 11

Bastien Montagne (mont29) closed T55731: Blender particle hair crash as Invalid.

More than a week without reply or activity. Due to the policy of the tracker archiving for until required info/data are provided.

Sat, Aug 11, 2:55 PM · Physics, BF Blender: 2.8

Fri, Aug 10

Jurek (solartistic) added a comment to T56282: Crash - going from Edit mode to Particle mode with 'Tab' key.

I realised this crash happens only if the particle system was modified before with the Particle edit mode.
You can reproduce this crash on the startup scene by doing the following:

Fri, Aug 10, 9:01 PM · Physics, BF Blender: 2.8
Bastien Montagne (mont29) assigned T56282: Crash - going from Edit mode to Particle mode with 'Tab' key to Sergey Sharybin (sergey).

Confirmed on linux as well, see ASAN backtrace below, @Sergey Sharybin (sergey) think that one is for you. :)

Fri, Aug 10, 9:59 AM · Physics, BF Blender: 2.8

Sat, Aug 4

Bastien Montagne (mont29) added a comment to T55731: Blender particle hair crash.

That file has nothing to do with initial report… *sigh*

Sat, Aug 4, 3:08 PM · Physics, BF Blender: 2.8

Fri, Aug 3

Bastien Montagne (mont29) closed T55740: Crash when trying to render with F12 in Mac as Resolved.

Thanks!

Fri, Aug 3, 12:03 PM · Rendering, Physics, BF Blender: 2.8

Mon, Jul 30

Bastien Montagne (mont29) assigned T56145: Blender is not renderng mesh with cloth phisics to Sybren A. Stüvel (sybren).

@Brecht Van Lommel (brecht) @Sybren A. Stüvel (sybren) iirc, this is known limitation due to how our cache works currently?

Mon, Jul 30, 11:53 AM · Physics, Rendering, BF Blender

Thu, Jul 26

Rombout Versluijs (rombout) added a comment to T50864: Image Sequence Textures for Particles failing.

To bad this is an ongoing issue with 2.79 i was already wondering why the particles where not following.

Thu, Jul 26, 8:29 AM · Cycles, Physics, Images & Movies, Animation, BF Blender

Wed, Jul 25

Bastien Montagne (mont29) assigned T55974: Crash when using Surface Force Field Type on UV Sphere to Sybren A. Stüvel (sybren).

Confirmed, since this is related to physics maybe @Sybren A. Stüvel (sybren) wants to have a look?

Wed, Jul 25, 9:28 PM · Physics, BF Blender: 2.8
kin malmin (star) added a comment to T55731: Blender particle hair crash.

It looks like all the Metaball objects do close blender 2.80a

Wed, Jul 25, 11:33 AM · Physics, BF Blender: 2.8
kin malmin (star) added a comment to T55731: Blender particle hair crash.

here is the file, go to edit mode and select the green sircel

Wed, Jul 25, 11:24 AM · Physics, BF Blender: 2.8

Tue, Jul 24

Jeffry Gutierrez (jeruki) added a comment to T55740: Crash when trying to render with F12 in Mac.

I confirm that it works fine with the latest build so this can be closed.

Tue, Jul 24, 6:42 PM · Rendering, Physics, BF Blender: 2.8
Bastien Montagne (mont29) triaged T55740: Crash when trying to render with F12 in Mac as Incomplete priority.

Cannot confirm that here on linux (though psys code spits out a huge amount of asserts…), mind re-checking with latest 2.8 build? thanks.

Tue, Jul 24, 10:07 AM · Rendering, Physics, BF Blender: 2.8
Bastien Montagne (mont29) triaged T55731: Blender particle hair crash as Incomplete priority.

Please follow our submission template and guidelines, also read these tips about bug reports, and make a complete, valid bug report, with required info, precise description of the issue, precise steps to reproduce it, small and simple .blend and/or other files to do so if needed, etc.

Tue, Jul 24, 9:33 AM · Physics, BF Blender: 2.8

Mon, Jul 23

Bastien Montagne (mont29) closed T55561: Dupligroup on particles lies down for change of sizefrom 1.0 to 0.1 and back to 1.0 as Resolved.

I can confirm that in 2.79 and current master, but not in blender2.8, so will consider this issue as fixed. :)

Mon, Jul 23, 9:58 AM · Physics, BF Blender

Sun, Jul 22

Bastien Montagne (mont29) merged task T55151: Smoke simulator uses Index Number parameter as file suffix making it impossible to parse frame order into T47655: OpenVDB cache files have extra "_00" at end..
Sun, Jul 22, 1:08 PM · Physics, BF Blender

Fri, Jul 20

Bastien Montagne (mont29) assigned T55433: Particle physics type: Keyed Bug to Sergey Sharybin (sergey).

Can confirm the issue (on both master and 2.8), it’s buffer overflow bug:

Fri, Jul 20, 2:47 PM · BF Blender: 2.8, Physics, BF Blender

Jul 17 2018

Christopher Anderssarian (Christopher_Anderssarian) added projects to T54889: Particle Hair: Physics, Rendering.
Jul 17 2018, 10:30 PM · Rendering, Physics, BF Blender
Christopher Anderssarian (Christopher_Anderssarian) added projects to T53341: Weird bug with Particle Instance Modifier: Rendering, Physics, Modifiers.
Jul 17 2018, 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.
Jul 17 2018, 9:54 PM · Physics, BF Blender
Christopher Anderssarian (Christopher_Anderssarian) added a project to T55731: Blender particle hair crash: Physics.
Jul 17 2018, 6:34 PM · Physics, BF Blender: 2.8

Jun 25 2018

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.

Jun 25 2018, 11:15 AM · Alembic, BF Blender, Physics

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 · BF Blender: 2.8, Physics, BF Blender
Leonardo (Crazy93) created T55433: Particle physics type: Keyed Bug.
Jun 11 2018, 8:15 AM · BF Blender: 2.8, 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