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Skygrasper
02-11-2009, 08:58 PM
Hey,

Im currently rigging a mobile suit model that I created, I started with the arms and have run into a few issues (I use 3DS Max 2009). As shown in the images below (hosted on ImageShack), I want the shoulder armor to rotate with the arm on the Y axis, but not on the X axis. I also want the upper arm top bone to just rotate on the X axis, and not bend on the Y axis. Im using a HI IK solver on this arm, starting at the upper arm top bone, and ending at the wrist. I dont know a whole lot about rigging outside of some of the basic IK's. If this can be solved with some sort of Constraint, any tips on how to go about setting that up would be great.

Bone System:
http://img5.imageshack.us/img5/678/bonesystemms0.th.jpg (http://img5.imageshack.us/my.php?image=bonesystemms0.jpg)

Shoulder Arm Rotation Problem:
http://img90.imageshack.us/img90/9986/shoulderarmorrotationrs9.th.jpg (http://img90.imageshack.us/my.php?image=shoulderarmorrotationrs9.jpg)

Correct Shoulder Arm Rotation:
http://img5.imageshack.us/img5/4329/shoulderarmorrotationriwk9.th.jpg (http://img5.imageshack.us/my.php?image=shoulderarmorrotationriwk9.jpg)

Upper Arm Problem:
http://img232.imageshack.us/img232/1713/upperarmproblemnc1.th.jpg (http://img232.imageshack.us/my.php?image=upperarmproblemnc1.jpg)

Thanks in advance.

2scale
02-11-2009, 09:35 PM
It's been a while since I used Max as I am primarily a maya, xsi user.You could just lock off the rotation of the bone under the bone properties and or use and extra bone on the chain of bones below the shoulder? You will probably need to use some sort of Rp ikSolver instead of your basic single chain solver to get the shoulder working correctly as well.

hope that steers you in the right direction.

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