Lattice with Armature modifier not updating correctly #54594
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Reference: blender/blender#54594
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This happen in 2.79 and master ... I'm 90% sure is only happens with the New Depsgraph.
I'm attaching a blend file which contains part of the rig of Spring.
What happens is that when you rotate or move the bone head_def_3, the lattice starts jumping around. This seems to happen only if the if the armature that deforms the lattice is actively deforming it, it doesn't happen if the armature is in rest pose.
Ok, so now I'll describe the setup.
You have 3 objects:
So, the lattice is deformed by "side_hair_rig" with an armature modifier, and both objects are parented to the "head_def_3" bone in the Rig-Spring object. When you manipulate head_def_3, the lattices jumps around. In other words, the problem seems to occur when you manipulate the parent rig, not if you directly manipulate the deformation rig.
lattice_bug_spring.blend
Added subscriber: @jpbouza-4
Added subscribers: @eyecandy, @Hjalti, @ideasman42
Added subscriber: @lichtwerk
I can only get it to fail with new depsgraph.
Not sure it helps (and if the order of logging is reliable), but here is an output of two jumping frames with
--debug-depsgraph
:then the next:
notice how
recalcdata LATTICE_SIDE_HAIR_L
is not last in one occasion?This issue was referenced by
ea1751a038
Changed status from 'Open' to: 'Resolved'