Can you apply physics to only part of an object?

[Tails1942]

I have a character, who wears a robe. Actually he is almost nothing but a robe, and a mask, so the character itself is actually a robe.

Because of this, I want to make his sleeves act like cloth, instead of his whole body. I have in blender divided his sleeves into vertex groups, if this is of any help.

Are there any way to apply physics to only part of an object?

[Owen-Reynolds]

If you added bones to the robe – might look like a bat-wing skeleton – you could hand rag-doll it. Give them all big, overlapping envelopes. To rag-doll by hand, each bone gets a rigidbody, a collider and a characterJoint or hinge to its parent bone. I’d imagine you could make a dummy Kinematic-RB parent as the root, childed to the body. That would give them something legal to latch onto, and keep them from “pulling” the body.

For sleeves to flap nicely…there’s probably a whole art to it. I’d imagine maybe 3 bone chains down the length. Constraints on the joint rotation might keep them from pulling the sleeve off the arm.

Creating the bone envelopes automatically creates vertex groups – it puts each vert in the bone that has the most influence on it. I don’t think having vert groups already will really help.

[anon25104582]

http://unity3d.com/support/documentation/Components/class-SkinnedCloth.html

This is what you’re looking for.