Spring constraint #26825
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Reference: blender/blender#26825
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%%%The spring constraint can be used to get wobbly/bouncy effects on bone chains such as antennas etc. The target bone (the one carrying the constraint) copies the transforms of the source bone and adds the spring effect to it. It also uses a buffer that allows skipping and backwards scrubbing while maintaining consistency, and as the buffer is saved along with the blender file, it should work on a renderfarm too (however i did not actually test that).
Here is a little demo on vimeo: http://vimeo.com/22077796
There is a windows build for testing available for download here: http://graphicall.org/builds/builds/showbuild.php?action=show&id=1698
An example blend-file: http://ivogrigull.com/blender25/spring_demo.blend
One issue is interactivity though. It is not possible to pose/animate a chain predictably while the constraint is active, because the buffers of the chain's spring constraints would need to be updated on the fly. I think this goes beyond my coding abilities and understanding of the animation system code. And i gues it would be relatively slow too. Nevertheless i believe it is a great help for animators and certainly nice to have, even if he needs to enable/disable in order to edit it. I suggest to use a python driver expression to control all bones' constraints at once to ease the pain. In the current state it needs to be considered as a post effect.
%%%
Changed status to: 'Open'
%%%updated to svn r41542
attached .spring_patch_r41542.patch%%%
%%%update to r41769%%%
%%%update to r46801%%%
%%%Update to R55180%%%
Added subscriber: @mont29
Is this patch still alive/useful?
I still use it , but it crash in object mode , works fine in armature pose mode.
It's from same author of mesh cache modifier , very useful for character animation.
Added subscriber: @Sergey
This is useful feature to have, but i'm not totally happy with the code. Main issues:
Added subscriber: @dfelinto
Changed status from 'Confirmed' to: 'Archived'
Hi, thanks for your patch.
We are undergoing a Tracker Curfew where we are automatically closing old patches.
If you think the patch is still relevant please update and re-submit it. For new features make sure there is a clear design from the user level perspective.