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Sergej Reich (sergof)
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Sep 26 2009, 12:52 AM (511 w, 3 d)

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Mar 21 2019

Sergej Reich (sergof) added a comment to T58991: Force field not affecting rigid body simulation.

As I mentioned there is a second regression here, in that changes to the force field don't invalidate rigid body cache.
Simple way to reproduce:

  1. Add a rigid body.
  2. Add a force field.
  3. Simulate a few frames.
  4. Change force field strength and see that the rigid body cache hasn't been invalidated.
Mar 21 2019, 9:11 PM · BF Blender

Feb 14 2019

Sergej Reich (sergof) added a comment to T60645: Behavior of rigid body in real time is different from 2.7 Ver.

There's been quite a few changes to the way the transformation tools work in 2.8 it seems, so I don't know if it's possible to make it work like before.
I'll try to look into it wen i get some time.

Feb 14 2019, 9:29 PM · BF Blender

Dec 18 2018

Sergej Reich (sergof) placed T58991: Force field not affecting rigid body simulation up for grabs.
Dec 18 2018, 6:30 PM · BF Blender
Sergej Reich (sergof) placed T59449: adding particle system creates error in rigid body up for grabs.
Dec 18 2018, 6:28 PM · BF Blender
Sergej Reich (sergof) updated subscribers of T59449: adding particle system creates error in rigid body.

Seems like another depsgraph problem, @Bastien Montagne (mont29) or @Sergey Sharybin (sergey) should look at this.

Dec 18 2018, 6:28 PM · BF Blender

Dec 13 2018

Sergej Reich (sergof) updated subscribers of T58991: Force field not affecting rigid body simulation.

Ok, I fixed part of this in 5cc015f0ad05.
However there's another regression. Changes to force fields don't mark the rigid body cache as outdated (the PTCACHE_OUTDATED flag needs to be set).
I don't think I have time to figure out how the depsgraph works to add the proper relations for that, so I think either @Sergey Sharybin (sergey) or @Bastien Montagne (mont29) should take a look.

Dec 13 2018, 12:42 PM · BF Blender
Sergej Reich (sergof) committed rB5cc015f0ad05: Fix force fields not affecting rigid bodies (authored by Sergej Reich (sergof)).
Fix force fields not affecting rigid bodies
Dec 13 2018, 12:35 PM

Jul 24 2018

Sergej Reich (sergof) accepted D3544: Fix T55958: allow the user to select between spring and spring2..

LGTM

Jul 24 2018, 2:42 AM

Jul 21 2018

Sergej Reich (sergof) requested changes to D3544: Fix T55958: allow the user to select between spring and spring2..
Jul 21 2018, 9:30 PM
Sergej Reich (sergof) added a comment to T55958: Bullet spring2 tends to explode at high damping and stiffness.

@Alexander Gavrilov (angavrilov) Having a drop down menu to select the spring type, like I mentioned above, should be fine.

Jul 21 2018, 7:26 AM · BF Blender

Jul 20 2018

Sergej Reich (sergof) added a comment to T55958: Bullet spring2 tends to explode at high damping and stiffness.

I find the generic spring constraint to be the most useless of all the constraints, having 2 of them is just silly.
I wouldn't mind too much if the spring constraint had a type field that would be set to the old spring behaviour for old files and default to the new behaviour for new constraints.

Jul 20 2018, 10:04 PM · BF Blender

Jul 14 2018

Sergej Reich (sergof) added a comment to T55958: Bullet spring2 tends to explode at high damping and stiffness.

The advantage of the new springs is that you can actually create stiff springs.
This is a bug in bullet, so it should also be reported there.
As for how to handle it in blender. I'd really like to avoid having 2 generic spring constraints.
So if the new one doesn't work well and can't be fixed, just revert the change and continue to use the old one.

Jul 14 2018, 5:18 PM · BF Blender

Apr 7 2018

Sergej Reich (sergof) accepted D3125: Use the newer version of the bullet 6dof spring constraint for rigidbody..

Regarding bullet update: I've only backported the spring fix as a full update would once again change how all dynamics work.
So it's better to hold of full update until we actually need it.

Apr 7 2018, 5:49 PM
Sergej Reich (sergof) committed rB4db3b4da4635: Bullet: Fix velocity calculation of new spring constraint (authored by Sergej Reich (sergof)).
Bullet: Fix velocity calculation of new spring constraint
Apr 7 2018, 5:44 PM

Apr 1 2018

Sergej Reich (sergof) committed rBb29ecbfc6bb5: Fix compiling with Alembic (authored by Sergej Reich (sergof)).
Fix compiling with Alembic
Apr 1 2018, 7:52 PM

Sep 5 2017

Sergej Reich (sergof) added a reverting change for rB9cd6b03187b9: Fix T50230: Rigid Body simulation shouldn't step when time is beyond cached area: rB4ad5df885820: Fix T52374: Changes of rigid body related settings during simulation will break….
Sep 5 2017, 8:00 PM
Sergej Reich (sergof) committed rB4ad5df885820: Fix T52374: Changes of rigid body related settings during simulation will break… (authored by Sergej Reich (sergof)).
Fix T52374: Changes of rigid body related settings during simulation will break…
Sep 5 2017, 8:00 PM
Sergej Reich (sergof) committed rB0fd31c53ee1a: Rigidbody: Fix regression introduced in ee3fadd (authored by Sergej Reich (sergof)).
Rigidbody: Fix regression introduced in ee3fadd
Sep 5 2017, 8:00 PM
Sergej Reich (sergof) added a reverting change for rB3edc8c1f9bc6: Fix rigid body not resimulating after cache invalidation: rB4ad5df885820: Fix T52374: Changes of rigid body related settings during simulation will break….
Sep 5 2017, 8:00 PM
Sergej Reich (sergof) added a reverting change for rBb87d10d4fe4d: Better fix for rigid body not resimulating: rB4ad5df885820: Fix T52374: Changes of rigid body related settings during simulation will break….
Sep 5 2017, 8:00 PM
Sergej Reich (sergof) closed T52374: Changes of rigid body related settings during simulation will break the simulation (worked in 2.78c) as Resolved by committing rB4ad5df885820: Fix T52374: Changes of rigid body related settings during simulation will break….
Sep 5 2017, 8:00 PM · BF Blender: Regressions, BF Blender
Sergej Reich (sergof) added a comment to T52434: Setting origin to Center of Mass on zero-volume objects produces wrong results now in 2.79.

So I really don't like this.
Setting the origin already has too many options, when is "Origin to Geometry" ever actually useful, especially since we have the "Center of Mass" option.
If anything we should remove the "Geometry" option.
This is not a trivial matter as well, in the past I had several users being confused by this.

Sep 5 2017, 4:50 PM · BF Blender: Regressions, BF Blender
Sergej Reich (sergof) added a comment to T50765: Rigid body dynamics: Initially deactivated objects are not activated on collision, but on bounding box intersection.

This is not really a bug but more of a limitation.
I have a patch that does proper deactivation in the rigid body improvements branch, but it wasn't committed because it wasn't clear how deactivation should be handled in blender in general.
I might dust if off since this really can be preveived as a bug.

Sep 5 2017, 1:12 PM · Physics, BF Blender
Sergej Reich (sergof) added a comment to T51233: Deformation checkbox should be visible but isn't.

This is intentional behaviour. "Final" includes generative modifiers which don't just deform the mesh but generate a new one.
Now we could do shenanigans like rebuilding the collision shapes every frame, but that would be extremely slow and unstable.

Sep 5 2017, 1:06 PM · User Interface, Physics, BF Blender
Sergej Reich (sergof) added a comment to T52374: Changes of rigid body related settings during simulation will break the simulation (worked in 2.78c).

Also found another bug unrelated to this which was introduced after 2.78 and is in the RC (baking is broken).
Will look into it later today.

Sep 5 2017, 7:53 AM · BF Blender: Regressions, BF Blender
Sergej Reich (sergof) added a comment to T52374: Changes of rigid body related settings during simulation will break the simulation (worked in 2.78c).

Can someone test this patch to make sure it fixes this and T50230 before I commit?

Sep 5 2017, 7:21 AM · BF Blender: Regressions, BF Blender

Jan 27 2017

Sergej Reich (sergof) committed rBbce9e80d82a5: CMake: Fix typo (authored by Sergej Reich (sergof)).
CMake: Fix typo
Jan 27 2017, 6:01 AM

Nov 6 2016

Sergej Reich (sergof) added a comment to D2331: Expose Bullet rotational spring settings in the UI..

Probably, but you'd also want to do more significant changes as well.
For the Spring constraint specifically you'd want to do something like this: T39076
More generally there are several big design decisions that I think were wrong. If we could change those for 2.8 that would be even better, but that's a bigger toppic.

Nov 6 2016, 3:40 PM

Nov 5 2016

Sergej Reich (sergof) accepted D2331: Expose Bullet rotational spring settings in the UI..

I think adding this constraint was a mistake (it's too complicated to use, stiff springs don't really work), but since it's already there adding these settings won't make things worse, so LGTM :)

Nov 5 2016, 2:56 PM

Oct 22 2016

Sergej Reich (sergof) assigned T49813: Crash after changing Alembic cache topology to Kévin Dietrich (kevindietrich).
Oct 22 2016, 2:07 AM · Import/Export, BF Blender
Sergej Reich (sergof) created T49813: Crash after changing Alembic cache topology.
Oct 22 2016, 2:06 AM · Import/Export, BF Blender

Feb 15 2016

Sergej Reich (sergof) added a comment to T47402: A Rigid Body does not keep the initial velocity after the animated checkbox is disabled.

There shouldn't be any problems with animating these properties in principle.

Feb 15 2016, 5:16 PM · Physics, BF Blender

May 16 2015

Sergej Reich (sergof) added a comment to T44720: Rigidbody simulation - flip object just at the simulation's beginning.

The flip happens because the object has negative scale on the z axis.

May 16 2015, 12:15 AM · BF Blender

May 12 2015

Sergej Reich (sergof) added a comment to D1291: BGE: Fix T33722 : non sleeping static moved object..

I'm very suspicious about clearing the kinematic flag.
I'm not familiar with how the game engine handles this exactly, but it should be possible to handle these flags when objects are added/modified.
If kinematic objects don't sleep, then there's probably a flag not being set correctly somewhere when it's added.

May 12 2015, 6:42 PM · Game Physics, Game Engine

May 4 2015

Sergej Reich (sergof) added a comment to D1279: BGE: Fix: 16 byte heap alignment compiler warning (level 3 C4316) for Bullet classes.

From a quick glance this patch shouldn't be necessary since the affected classes aren't used by Bullet.

May 4 2015, 3:36 PM · Game Engine

May 3 2015

Sergej Reich (sergof) committed rBee7538613a18: Rigidbody: Fix viewport update when changing collision shape in toolbar (authored by Sergej Reich (sergof)).
Rigidbody: Fix viewport update when changing collision shape in toolbar
May 3 2015, 5:59 PM

Apr 28 2015

Sergej Reich (sergof) added a comment to D1268: Extension of the C-API for Bullet in Blender, to enable customized collision detection outside of rigid body dynamics..

@Lukas Toenne (lukastoenne): I was just about to ask you about this :)
Looks good at first glance.
I'm not quite sure about the ghost object part, will take a closer look over the weekend.

Apr 28 2015, 10:16 PM

Apr 23 2015

Sergej Reich (sergof) accepted D1253: BGE : fix bugs with physics collision mask/group.

lgtm

Apr 23 2015, 11:30 PM

Apr 18 2015

Sergej Reich (sergof) accepted D1243: BGE : Support for collision group/mask from the api + activated on EndObject..

Looks fine to me.
You could probably do the refresh collisions part in different ways but it should be ok if it's really needed.

Apr 18 2015, 11:25 AM · Game Engine, Game Physics

Apr 14 2015

Sergej Reich (sergof) added a comment to T44375: Rigid Body not works well with curve modifier.

There are two things here:
If you want the rigid body to deform, you have to check the "Deforming" checkbox.
The second problem is that you actually move the deforming rigid body, so even if it looks like it's standing still to the simulation the object is moving in the direction it's animated (I understand that that's what you need to do for the curve deformation to work). So the second file will work, but the circle will still fail.

Apr 14 2015, 3:13 PM · BF Blender

Apr 3 2015

Sergej Reich (sergof) added a comment to T44080: Linking empties with rigid body constraints into new scene will result in losing constraint settings.

Linking with rigid bodies is tricky, afair we decided that you counldn't link individual rigid body objects but could link entire scenes containing rigid bodies.
The problem is that the rigid body world belongs to the scene which causes all sorts of trouble for linking.
If you need individual objects you have to bake. Otherwise keep all objects that belong to one simulation in one scene.
Not sure if the unlinking in this case is a bug though, I don't really have this stuff in my head anymore and can't tell what is good behaviour for linked objects in blender.

Apr 3 2015, 7:52 PM · BF Blender

Jan 12 2015

Sergej Reich (sergof) added a comment to D979: BGE: Fix for T42285 & T38935 crashes. They are Rayhit related..

I'm not familiar with this code so I'm not sure why we get a hit reported without having a mesh, I guess this is intentional?
Doing the check to prevent the crash should be fine then, but maybe it's better to test for m_hitMesh?

Jan 12 2015, 1:36 AM

Nov 11 2014

Sergej Reich (sergof) added a comment to T35799: Bullet viewport integration allocates too much memory on Windows for several shape types.

@Julian Eisel (Severin), actually I wanted to look into this again soon, maybe in the next few weeks when I can find some time.
Unfortunately it's not so simple to track down.

Nov 11 2014, 7:04 PM · BF Blender, Animation
Sergej Reich (sergof) committed rB52d571e189d5: Avoid calling powf with integer exponent in more places (authored by Sergej Reich (sergof)).
Avoid calling powf with integer exponent in more places
Nov 11 2014, 6:18 PM
Sergej Reich (sergof) committed rB9c15439c5c91: cloth: Fix overallocation for collisions (authored by Sergej Reich (sergof)).
cloth: Fix overallocation for collisions
Nov 11 2014, 6:18 PM
Sergej Reich (sergof) committed rB490b73ff22ce: cloth: Avoid calling powf with integer exponent (authored by Sergej Reich (sergof)).
cloth: Avoid calling powf with integer exponent
Nov 11 2014, 6:18 PM

Oct 29 2014

Sergej Reich (sergof) closed T40017: Wrong Motion Blur with Rigid Body Simulation / Point Cache as Resolved.
Oct 29 2014, 3:40 PM · Physics, BF Blender
Sergej Reich (sergof) added a comment to T40017: Wrong Motion Blur with Rigid Body Simulation / Point Cache.

Should be fixed by rBf7dedbc

Oct 29 2014, 3:39 PM · Physics, BF Blender

Aug 27 2014

Sergej Reich (sergof) added a comment to T40017: Wrong Motion Blur with Rigid Body Simulation / Point Cache.

Ok, can reproduce now.

Aug 27 2014, 9:31 PM · Physics, BF Blender
Sergej Reich (sergof) added a comment to T36088: Rigid body constraint object behaves strange if you run without Update Dependencies once.

Hmm, I can't reproduce the problem, seems to work fine.

Aug 27 2014, 8:08 PM · BF Blender, Animation
Sergej Reich (sergof) added a comment to T39076: Implementation for simplified spring constraint.

Just a heads up, upstream bullet has a new spring constraint that might work better if someone is interested in playing with it.

Aug 27 2014, 8:05 PM · BF Blender, Physics
Sergej Reich (sergof) closed T38391: Animating the speed setting in Rigid Body World causes strange behavior with constraints as Archived.
Aug 27 2014, 8:04 PM · BF Blender, Physics
Sergej Reich (sergof) added a comment to T38391: Animating the speed setting in Rigid Body World causes strange behavior with constraints.

Ok, I think messing with bullet's main loop is not a good idea after all.
Closing this, as a limitation.

Aug 27 2014, 8:03 PM · BF Blender, Physics
Sergej Reich (sergof) added a comment to T40017: Wrong Motion Blur with Rigid Body Simulation / Point Cache.

Can't reproduce issues with baked sim with either 2.71 or master. Are there specific steps I can follow?

Aug 27 2014, 8:00 PM · Physics, BF Blender

Aug 9 2014

Sergej Reich (sergof) added a comment to T32105: Unstable triangle mesh collision bounds .

@Inês Almeida (brita_)
Look in intern/rigidbody/rb_bullet_api.cpp, also the convex hull mesh operator in edit mode uses it.
As for whether the GE should use it or not, I didn't make quality comparisons but the new hull computer should be much faster with bigger meshes.
So for games this shouldn't be that important since you generally don't use big meshes and we didn't get any complaints about convex hull generation afaik.

Aug 9 2014, 9:17 PM · Game Engine, Game Physics

Aug 7 2014

Sergej Reich (sergof) added a comment to T32105: Unstable triangle mesh collision bounds .

No, it does lower stacking stability. If you use it you'll need more solver iterations/simulation steps.
The thing is that in this case split impulse might only marginally help and only sometimes.

Aug 7 2014, 8:45 PM · Game Engine, Game Physics

Jul 9 2014

Sergej Reich (sergof) added a comment to T40909: broken softbody..

Looking further into it, culprit seems to be rBdf1a199, settings in blenderobject->bsoft are now completely ignored.
Here is a quick patch:

Jul 9 2014, 7:11 PM · Game Physics, Game Engine
Sergej Reich (sergof) added a comment to T40909: broken softbody..

This is a regression, it's been broken somewhere after 2.70.
My guess would be that the way softbodies are constructed by blender has changed.

Jul 9 2014, 6:47 PM · Game Physics, Game Engine

Jul 5 2014

Sergej Reich (sergof) added a comment to T33564: Character physics type has no obstacle simulation.

Afaik this is a AI feature, not really physics related.
If moving obstacles are supported, it could probably be done for the character controller as well.

Jul 5 2014, 10:59 AM · Game Engine, Game Physics

Jun 22 2014

Sergej Reich (sergof) updated subscribers of T40682: BGE local space character movement is funky when add is checked.

@Inês Almeida (brita_) that depends on whether walk direction is allowed to be 0 or not. If it can be zero just check for that and don't call normalize.
I'm not sure what's intendet here, maybe ask @Mitchell Stokes (moguri)?

Jun 22 2014, 2:56 PM · Game Engine, Game Physics
Sergej Reich (sergof) added a comment to T40684: Triangle mesh BGE character mode crash.

@Inês Almeida (brita_) the problem with the cast is that the shape can be non-convex, as a trimesh is. So we have to at least make sure that the shape is in fact convex before casting.

Jun 22 2014, 2:55 PM · Game Physics, Game Engine

Jun 21 2014

Sergej Reich (sergof) added a comment to T30630: Crash in Game Engine collision detection.

@Inês Almeida (brita_) moguri's suggestion is just a style nitpick :)

Jun 21 2014, 12:52 PM · Game Engine, Game Physics
Sergej Reich (sergof) added a comment to T40683: noncube meshes bounces when rotated.

Usually character controllers use shapes like sphere and capsules. Maybe there is a problem when doing a convex cast with other shapes? I'm just guessing though.

Jun 21 2014, 12:44 PM · Game Physics, Game Engine
Sergej Reich (sergof) added a comment to T40682: BGE local space character movement is funky when add is checked.

Hmm, the character controller actually rotates the object. I guess there's a problem there or maybe the walk direction is not calculated correctly. I'd start by looking at KX_ObjectActuator.cpp, lines 223-255.

Jun 21 2014, 12:31 PM · Game Engine, Game Physics
Sergej Reich (sergof) added a comment to T40684: Triangle mesh BGE character mode crash.

From a quick glance, the character controller needs a convex shape. This is either the main shape assigned, or a separate convex shape.
For the latter m_useGhostObjectSweepTest needs to be set to false.

Jun 21 2014, 11:27 AM · Game Physics, Game Engine

Jun 19 2014

Sergej Reich (sergof) added a comment to T35345: Compound Object pulsing in Blender 2.57.

I'd rather not do that.
Since this is only a problem with compounds, not all static objects, having 0.04 as default seems still sensible.
Bblender first makes all objects static and you can switch to dynamic afterwards.
There is no way of setting different default margins for dynamics and staric objects, otherwise we could make static objects have 0 margins by default.

Jun 19 2014, 2:48 PM · Game Physics, Game Engine

Jun 14 2014

Sergej Reich (sergof) closed T40590: Rigid body problem within inner mesh? as Invalid.

Thanks for the report, but this is not a bug.
You're assigning convex hull shapes to non-convex objects (pretty much all objects in the files are concave).
What you need to do is either split the objects into convex parts, or use mesh shapes. Mesh shapes are not very stable of course to it'll be hit or miss.
In general, if you want to do things like having objects rotate about a specific axis, it's much better to use constraints.

Jun 14 2014, 7:46 PM · BF Blender, Physics

May 16 2014

Sergej Reich (sergof) added a comment to T38895: Unstable behavior using VehicleWrapper in blender 2.70 test build.

Using the old raycast method should be fine, we did that for T37673 as well.

May 16 2014, 1:25 PM · Game Engine

May 12 2014

Sergej Reich (sergof) edited this Maniphest Task.
May 12 2014, 4:49 PM · BF Blender, Physics
Sergej Reich (sergof) edited this Maniphest Task.
May 12 2014, 4:47 PM · BF Blender
Sergej Reich (sergof) edited this Maniphest Task.
May 12 2014, 4:38 PM · BF Blender, Physics
Sergej Reich (sergof) edited this Maniphest Task.
May 12 2014, 4:38 PM · Game Engine
Sergej Reich (sergof) edited this Maniphest Task.
May 12 2014, 4:36 PM · BF Blender
Sergej Reich (sergof) edited this Maniphest Task.
May 12 2014, 4:36 PM · BF Blender
Sergej Reich (sergof) edited this Maniphest Task.
May 12 2014, 4:35 PM · BF Blender, Physics
Sergej Reich (sergof) edited this Maniphest Task.
May 12 2014, 4:34 PM · BF Blender, Modifiers

Apr 25 2014

Sergej Reich (sergof) added a comment to T39076: Implementation for simplified spring constraint.

Sorry for responding so late.
In general this is a good idea.
However, I have some reservations.
In hindsight we shouldn't have added the generic spring constraint either.
The main problem is that bullet's builtin springs don't behave very well and make it pretty much impossible to create stiff springs which is the main use case as far as I can see.
So I think we need a better spring implementation before adding it to the UI.

Apr 25 2014, 11:12 AM · BF Blender, Physics
Sergej Reich (sergof) closed T39886: Transformed parents of Rigid Bodies cause problems with Bake To Keyframes as Resolved.

Closed by commit rB258e30f2c7d2.

Apr 25 2014, 8:22 AM · BF Blender, Physics
Sergej Reich (sergof) edited this Maniphest Task.
Apr 25 2014, 8:22 AM · BF Blender, Physics

Apr 9 2014

Sergej Reich (sergof) closed T39646: Rigid Body Constraints non functional on release builds as Resolved.

Closed by commit rB6ffabfae852f.

Apr 9 2014, 1:52 AM · BF Blender
Sergej Reich (sergof) edited this Maniphest Task.
Apr 9 2014, 1:52 AM · BF Blender

Mar 31 2014

Sergej Reich (sergof) added a comment to T39529: Keyframing off Animated property of rigid body on second frame of rigid body simulation.

Hmm, I'll have to think about this. Not quite sure if we can make this work.

Mar 31 2014, 4:23 PM · BF Blender
Sergej Reich (sergof) claimed T39529: Keyframing off Animated property of rigid body on second frame of rigid body simulation.
Mar 31 2014, 4:19 PM · BF Blender
Sergej Reich (sergof) closed T39512: Keyframing off Animated property of a rigid body causing it not to be animated at all as Invalid.
Mar 31 2014, 4:17 PM · BF Blender
Sergej Reich (sergof) added a comment to T39512: Keyframing off Animated property of a rigid body causing it not to be animated at all.

@Garrett (Garrett):
I agree, I'm not a fan of the use of groups here either. But it was decided to use them here and it's hard to change it now.

Mar 31 2014, 4:17 PM · BF Blender

Mar 30 2014

Sergej Reich (sergof) added a comment to T39512: Keyframing off Animated property of a rigid body causing it not to be animated at all.

@Garrett (Garrett):
It seems thst your rigid body world doesn't have a group assigned.
Try selecting "RigidBodyWorld" as the simulation group and things should work.

Mar 30 2014, 6:43 PM · BF Blender

Mar 10 2014

Sergej Reich (sergof) added a comment to T38746: Rigid body simulation behaves wildly on OSX.

@jens verwiebe (jensverwiebe): I think you should take a look at this.

Mar 10 2014, 1:39 PM · BF Blender, Physics
Sergej Reich (sergof) updated subscribers of T38746: Rigid body simulation behaves wildly on OSX.
Mar 10 2014, 1:38 PM · BF Blender, Physics

Mar 4 2014

Sergej Reich (sergof) added a comment to T38746: Rigid body simulation behaves wildly on OSX.

Since the problem isn't present in the buildbot builds the bug is either fixed or it's a problem with the way the testbuild was made on OSX.
Please Test the release candidate when it comes out to make sure it's not the latter.

Mar 4 2014, 11:38 AM · BF Blender, Physics
Sergej Reich (sergof) renamed T38746: Rigid body simulation behaves wildly on OSX from Rigid body simulator bug to Rigid body simulation behaves wildly on OSX.
Mar 4 2014, 11:32 AM · BF Blender, Physics
Sergej Reich (sergof) updated subscribers of T38746: Rigid body simulation behaves wildly on OSX.

◀ Merged tasks: T38940.

Mar 4 2014, 11:30 AM · BF Blender, Physics
Sergej Reich (sergof) closed T38940: Hyperactive rigid bodies as a duplicate.

✘ Merged into T38746.

Mar 4 2014, 11:30 AM · BF Blender

Feb 23 2014

Sergej Reich (sergof) added a comment to T38746: Rigid body simulation behaves wildly on OSX.

@jesus lamas (jesus650rwc) @Rob Waite (vectorspace)
Could you test the latest buildbot and see whether the problem still exists?

Feb 23 2014, 4:25 PM · BF Blender, Physics

Feb 22 2014

Sergej Reich (sergof) added a comment to T38746: Rigid body simulation behaves wildly on OSX.

Can't reproduce here on arch linux 64 bit.
Would be good if someone could try to reproduce this on a mac.

Feb 22 2014, 8:26 PM · Physics, BF Blender

Feb 3 2014

Sergej Reich (sergof) added a comment to T38442: Adding/removing force fields doesn't invalidate simulation caches.

it's actually a general problem with simulations, changes to force fields don't always invalidate the cache.

Feb 3 2014, 2:14 PM · Physics, BF Blender
Sergej Reich (sergof) triaged T38442: Adding/removing force fields doesn't invalidate simulation caches as Confirmed, Medium priority.
Feb 3 2014, 2:13 PM · Physics, BF Blender

Jan 31 2014

Sergej Reich (sergof) added a comment to T38391: Animating the speed setting in Rigid Body World causes strange behavior with constraints.

@Ellwood Zwovic (gandalf3) it's not just a problem with constraints, if you change the speed of the simulation or the steps per second during collisions you'll have the same problem. So be careful.

Jan 31 2014, 12:18 PM · Physics, BF Blender
Sergej Reich (sergof) added a comment to T38391: Animating the speed setting in Rigid Body World causes strange behavior with constraints.

As far as I can see the best fix for now would be to either completely disallow animating the properties that intfuence timestep or just warn that bigger changes will have side effects.

Jan 31 2014, 8:47 AM · Physics, BF Blender

Jan 29 2014

Sergej Reich (sergof) added a comment to T38388: Creating a new scene with full copy sets rigidbody collision shapes to box..

Not sure about the "Creating a file in 2.69.10 and opening it in 2.69" case, can't reproduce here.

Jan 29 2014, 3:12 PM · Physics, BF Blender
Sergej Reich (sergof) closed T38388: Creating a new scene with full copy sets rigidbody collision shapes to box. as Resolved.

Closed by commit rBf17a1bd58b30.

Jan 29 2014, 3:06 PM · Physics, BF Blender