Copy Location doesn't respect the Pivot of rigid Body Joints! #31075

New Issue

Mad Overlord · 2012-04-23T21:38:36+02:00

Mad Overlord commented

2012-04-23 21:38:36 +02:00

Category: Physics

%%%To reduce Influence makes no Sense because we had to reduce until 0.0!
To just make the Pivot by moving the Objects Center results in Physics Errors!
To just make the Pivot by moving the Objects Center and then choose it to be a Static Triangle Mesh or Convex Hull is a very Performace eating Cheat!(I want a lot of Ragdolls)
So please fix that, or inform me what im doing wrong, this killed a lot of my Time!

Tested on new 2.63rc1 /Linux 64BIT

%%%

**Category**: Physics %%%To reduce Influence makes no Sense because we had to reduce until 0.0! To just make the Pivot by moving the Objects Center results in Physics Errors! To just make the Pivot by moving the Objects Center and then choose it to be a Static Triangle Mesh or Convex Hull is a very Performace eating Cheat!(I want a lot of Ragdolls) So please fix that, or inform me what im doing wrong, this killed a lot of my Time! Tested on new 2.63rc1 /Linux 64BIT %%%

Mad Overlord commented

2012-04-23 21:38:36 +02:00

Changed status to: 'Open'

Brecht Van Lommel commented

2012-04-26 12:28:21 +02:00

%%%Moved from Blender 2.6 Bug Tracker to Game Engine%%%

Sergej Reich commented

2012-07-08 12:08:54 +02:00

%%%I assume this is about specifying a custom center of mass for primitive collision shapes?
I don't think it's supported in bullet (at least not in a straight forward way). You can do tricks with compound shapes but I'm not sure if we want to do this.
To build rag dolls just use constraints, trying to optimize by shifting the center of mass doesn't sound like a good idea.
Also moving the object origin doesn't result in physics errors, it's just the way primitive collision shape calculation works If the origin isn't centered the collision shape won't be centered either sine it's built around the origin. The bug is in the collision shape visualization.%%%

%%%I assume this is about specifying a custom center of mass for primitive collision shapes? I don't think it's supported in bullet (at least not in a straight forward way). You can do tricks with compound shapes but I'm not sure if we want to do this. To build rag dolls just use constraints, trying to optimize by shifting the center of mass doesn't sound like a good idea. Also moving the object origin doesn't result in physics errors, it's just the way primitive collision shape calculation works If the origin isn't centered the collision shape won't be centered either sine it's built around the origin. The bug is in the collision shape visualization.%%%

Sergej Reich commented

2012-07-09 02:09:48 +02:00

%%%Regarding the copy location constraint, I'm not sure if it's a bug or just wrong usage.
Instead of trying to reduce the influence you probably could use the "offset" option. I'm not too familiar with this kind of setups to judge though.
However, this definitely isn't a physics bug.%%%

%%%Regarding the copy location constraint, I'm not sure if it's a bug or just wrong usage. Instead of trying to reduce the influence you probably could use the "offset" option. I'm not too familiar with this kind of setups to judge though. However, this definitely isn't a physics bug.%%%

Raf Colson commented

2014-08-24 18:28:12 +02:00

Added subscriber: @raco

Raf Colson commented

2014-08-24 18:28:12 +02:00

I think we have working examples of what mad-overlord was trying to do here. Could this be closed? As sergof mentioned this isn't a Physics bug anyway (but a collision shape visualization bug).

Porteries Tristan commented

2015-10-27 09:21:57 +01:00

Added subscriber: @panzergame

Porteries Tristan commented

2015-10-27 09:21:57 +01:00

Changed status from 'Open' to: 'Resolved'

Porteries Tristan closed this issue

2015-10-27 09:21:57 +01:00

Porteries Tristan self-assigned this 2015-10-27 09:21:57 +01:00

Porteries Tristan commented

2015-10-27 09:21:57 +01:00

Fixed pivot position in D658.

Fixed pivot position in [D658](https://archive.blender.org/developer/D658).

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Copy Location doesn't respect the Pivot of rigid Body Joints! #31075