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View Full Version : Subject: Angle Deformers in Skin


tonygib
01-17-2003, 08:29 AM
Hi all,

OK, I may be missing something very obvious but does the Angle Deformer options in the Skin modifier have one very serious limitation.

You set up your bones, add a Skin modifier, adjust envolopes and if needed specific vertices till you have a mesh that deforms pretty well. But of course when that mesh deforms during aniamtion, some parts will move or pinch into a shape that is just wrong. The most common spots are at the elbow and knee. So the solution is of course to apply an Angle Deformer and adjust the shape of the mesh when say the arm is bent back onto itself.

Well that all works just fine, since both the elbow and knee only bend or rotate in a single direction or flat plane. But what about the shoulder? That can bend in two plane's, ie the arm can move both up/down and front/back. Now the problem I am having, is that if I position the arm out in front and apply an angle deformer to fix the pinching, when I move the arm up the forward deformer applys once again.

So, is this correct, the angle deformer works ONLY on a single angle, it doesn't matter if that rotation is in the X, Y or Z planes, it will apply it just the same.

If this is the case, whats the solution? How do I have two independent angle deformers that will apply a different mesh adjustment depending on the rotation of the shoulder and I assume will blend the deformation when the arm is rotated in both directions? Which basically happens all the time.

thanks

Mahlon
01-17-2003, 02:44 PM
You are correct, and it's a limitation of the angle deformers. I would love for discreet to work on the skin modifier and really make it shine. Right now it feels about half there, and a wee clunky.

I don't have a work around for it for your should area, except what I may have mentioned in another post about the reactor controller. I use the reactor controller to control extra bones (controlling verts) in areas like the shoulder and wrist. Basically the extra bones are set up to position-react xyz to the upper arms rotation.

Mahlon

tonygib
01-18-2003, 01:25 AM
darn, this was one time I wanted to be wrong :)
Anyway thanks Mahlon, yeah I guess discreet does need to work on the skin modifier a bit and while the work around sounds a bit messy I guess we don't have much of a choice.

Since I have never used Character Studio do you know if it has the same problem?

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