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I'm testing soft body animation with simple cylinders. I cut the top of a cylinder (a circle) so that it deals with all the physics stuffs, and let the rest of the cylinder linked to the top part using 'child of' constraint. When I move the top part, the bottom part follows it well. However, it doesn't follow the parent when I apply soft body physics to the parent and it consequently falls down to the plane.

Am I missing something or the constraint is not working with soft body animation?

p.s: those two parts are intentionally separated. Thus, a comment like merge those two and apply physics is sadly not helpful.

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    $\begingroup$ Perhaps what you are missing is: The child of constraint works on an object level (basically it set's an offset from the objects origin) The softbody works on a mesh level, ie the origin is not affected. Perhaps vertex parenting might be an option instead of the constraint. (Haven't looked at your file to test) $\endgroup$ – batFINGER Jan 3 '18 at 16:29
  • $\begingroup$ Thank you so much. That could be the reason of this phenomenon. $\endgroup$ – dalbom Jan 4 '18 at 8:23

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