Bullet Physics - Collision with mesh edges bug, blender2.49b #19375

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philip beitzel · 2009-09-17T08:09:27+02:00

philip beitzel commented

2009-09-17 08:09:27 +02:00

%%%Dynamic objects bump into and get stuck on mesh edges.

Recently started happening in blender 2.49 releases.
See for yourself.

This is a serious bug for game developers.

Thanks, Phil%%%

%%%Dynamic objects bump into and get stuck on mesh edges. Recently started happening in blender 2.49 releases. See for yourself. This is a serious bug for game developers. Thanks, Phil%%%

philip beitzel commented

2009-09-17 08:09:27 +02:00

Changed status to: 'Open'

Mitchell Stokes commented

2009-09-17 22:20:02 +02:00

%%%I tested this, and I found that the "getting stuck" only happens with a Box bounding box. All the other options (even no bounds) will allow the box to smoothly go over the plane.%%%

philip beitzel commented

2009-09-18 08:08:13 +02:00

%%%This happens to me with everything except Triangle-mesh and Sphere bounds, Conditions depending on the speed and angle.

This does happen in 2.48, if moving very slow, but the problem seems to be multiplied in 2.49.

If this is not a bug then I apologize and will see if I can find the best solution.

Thanks,

Phil

[New file attached.]

%%%

%%%This happens to me with everything except Triangle-mesh and Sphere bounds, Conditions depending on the speed and angle. This does happen in 2.48, if moving very slow, but the problem seems to be multiplied in 2.49. If this is not a bug then I apologize and will see if I can find the best solution. Thanks, Phil [New file attached.] %%%

mani sabri commented

2009-10-25 21:25:50 +01:00

%%%I also tested this and as Phil said it got stock at very low speeds when there is no servo force for box,cylinder and convex hull.

windwos xp32 sp3 fx5200 2.4 branch rev 24079%%%

%%%I also tested this and as Phil said it got stock at very low speeds when there is no servo force for box,cylinder and convex hull. windwos xp32 sp3 fx5200 2.4 branch rev 24079%%%

Mitchell Stokes commented

2010-06-16 10:56:28 +02:00

%%%After fighting to implement this Bullet feature:
http://www.bulletphysics.org/Bullet/phpBB3/viewtopic.php?f=9&t=4603

I came to the conclusion, that this isn't a bug, but rather a matter of bad settings. You're collision margin (under advance in 2.49) was set to 0, which gave Bullet no padding. Simply changing the "floor" to a margin of 0.01 allowed the block to easily glide over it. The default in 2.5 and 2.49 is 0.6 (which might be a little high), so I'm thinking this could probably be closed.

Can you confirm that changing the margin fixes your problem?%%%

%%%After fighting to implement this Bullet feature: http://www.bulletphysics.org/Bullet/phpBB3/viewtopic.php?f=9&t=4603 I came to the conclusion, that this isn't a bug, but rather a matter of bad settings. You're collision margin (under advance in 2.49) was set to 0, which gave Bullet no padding. Simply changing the "floor" to a margin of 0.01 allowed the block to easily glide over it. The default in 2.5 and 2.49 is 0.6 (which might be a little high), so I'm thinking this could probably be closed. Can you confirm that changing the margin fixes your problem?%%%

philip beitzel commented

2010-06-18 05:30:57 +02:00

%%%Yes, changing the margin on the floor helps the problem.

But only the default cube has a margin of 0.060. If you add an object It's margin is 0.000. This is the same for 2.9 and 2.5-R-27695.

Thanks for the help Moguri.%%%

%%%Yes, changing the margin on the floor helps the problem. But only the default cube has a margin of 0.060. If you add an object It's margin is 0.000. This is the same for 2.9 and 2.5-R-27695. Thanks for the help Moguri.%%%

Mitchell Stokes commented

2011-02-22 05:24:17 +01:00

%%%Closing this as it's not a bug. If you still have problems, please post a new bug report.%%%

Mitchell Stokes commented

2011-02-22 05:24:17 +01:00

Changed status from 'Open' to: 'Archived'

Mitchell Stokes closed this issue

2011-02-22 05:24:17 +01:00

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Bullet Physics - Collision with mesh edges bug, blender2.49b #19375