Double boned wrist setup?

[svenip]

you mean a forearm setup ???

[Flo]

i dont know what you`re exactly looking for , but if youre looking for a simple forearme roll, that might be the easiest way >

http://www.flo3d.com/temp/simpleForearm.jpg


Flo

[Mr Fudge]

For lack of a better word a "forearm setup."

I have heard of a way to actually mimic the bones in the forearm. I like Flo's suggestion. Seems nice and simple. But for interests sake I wouldn't mind having a look at the more complicated setups for this area.

BTW: Flo, does your method offer very smooth deformation in the wrist and would it be advisable to add more bones for a cleaner deformation?

Thanks
- F

[Mr Fudge]

But like I said I am clueless about what to do at the elbow.

- F

[Jhonus]

I think that would be unessecary... it just rotates down the axis of the bone, so why would you need parallel bones?

Some people add 2 or 3 forearm joints.

[Mr Fudge]

Or maybe I just got the wrong end of the stick.

Still it had legs though. :(

Bye,
- F

[dmcgrath]

Like, Krugar says, here is another alternative. My setup is for a character that you can clearly see the two forearm bones overlap.
I used smooth bind to each side, for nicer deformations. This could probably have been done with just one bone but I like the the two bone setup more for my interactivity. I attached IK to the forearm portion as well.

[olivier georges]

hi,
the setup with ulna and radius bones is really cool when you have a muscle system , without muscle, it's a pain in the ass to obtain good deformations... with traditionnal skinning tools, i recommand you the method with multi joints to achieve a good twist in the forearm.... if you use rigid bind, you can use lattice too...

Olivier.

[Mr Fudge]

Presumably one would have stiffness set to 1 on all the bones in the forearm so when the IK handle is applied the arm only bends at the wrist???

- F

[dwalden74]

You can check out the script I just posted which will create the arm rig for you:

http://www.cgtalk.com/showthread.php?s=&threadid=30665

It´s a typical multi-joint setup (allows for bicep and forearm joints), and also has a pretty cool "stretchy joints" feature which basically scales joints on their X. Check it out and let me know if you find it useful.

:beer:
David

[Mr Fudge]

I setup the forearm with 4 bones down the leangth of it. I Then selected the 4 bones as well as the root joint of the hand and set driven keys along X Rotataion. But when I add the pole vector constraint it severly limits the amount of rotation I have just set up.

What to do?

- F

[dwalden74]

You don´t really want to put a pole vector on a chain with more than 2 joints. So, I would suggest you drive your binding joint hierarchy with a simpler 2-bone rig (connecting rotational attributes or using constraints or expressions). This is what the script I posted does, although it does not allow for more than 1 forearm joint and 1 bicep joint (I´m thinking about adding this feature, but right now I´m happy with just one in-between joint).

:beer:
David

[Mr Fudge]

Good call.

I am ashamed to admit that I followed your instructions to a T and still could not get that script to work. I exhausted every option I knew but still no dice.

BTW, is the help doc imbedded in the Mel Script. And how do I access it. I looked through the text in the scipt edotor but it didn't really clarify things for me.

- F

[dwalden74]

when you source/run the script, a window will pop-up. There you will find all the useage information ("About" tab). Yes, the help is inside the script. If you don´t know how to use a script, then try reading through the docs. BTW, the script might not work on earlier versions of Maya. Should work fine on at least v.4.

good luck-
David

[Mr Fudge]

- F

[Mr Fudge]

The thing about scripts is they seem to be very eratic for me. I have used many before. But when it comes to installing them only about 50 percent work. I have no idea why.

Maybe I'm just stoopid. But I can tie my shoelaces on my own! :)

- F

[CGTalk Moderation]

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.