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I have made a basic cardboard box model, and I'm trying to use bones for control/as a hinge. is there a way to make other objects push on the flaps controlled by a bone or must I animate this effect manually?(i.e. dropping a bowling ball onto a close box and having it move th flaps out of the way on the way down)

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  • $\begingroup$ Do you need to use bones? this could be more easily accomplished other ways. $\endgroup$
    – Scalia
    Dec 13 '14 at 22:11
  • $\begingroup$ you could use rigidbodys , or make a center IK rig that moves all pieces $\endgroup$
    – Knuckles209cp
    Dec 13 '14 at 22:56
  • $\begingroup$ @Knuckles209cp I don't think that would work as well as you would expect. $\endgroup$
    – GiantCowFilms
    Dec 13 '14 at 23:54
  • $\begingroup$ not necessarily need bones if there's another way to bend the flaps without going into edit mode and manually changing the shape. $\endgroup$
    – user16973
    Dec 14 '14 at 0:58
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Here, I've set up a simple box that is weight painted so the main bone only influences the flap. The tip bone is there for the IK setup.(not sure I did this entirely right since I'm still just learning this as well)

Anyways, here are a few pics. First you can add a loopcut to the edge of the flap to limit the weight paint so the bone does not affect the rest of the box.

enter image description here

Now the weight paint setup.

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There is an Empty added near the tip of the IK controller bone which is referenced in the IK constriant which I added to that bone as shown next.

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I also added rotation locks to both bones so they can only move in one axis. The image shows 2 places where this can be done.

enter image description here

Next is an animation showing the result of moving the Empty.

enter image description here

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