SimplyMaya Forums

Welcome to the forum, feel free to ask questions here.

Home / forum / Animation / Animation / IK Joint problems...
Register FAQ Members List Calendar Mark Forums Read

New Thread
 
Thread Tools
Old 25-12-2006, 06:15 AM   #1
I-Iybrid
Simply Maya OG
 
I-Iybrid's Avatar
 
Join Date: Dec 2002
Location: Queensbury NY, US A
Posts: 1,438
Thanks: 2
Thanked 14 Times in 14 Posts
Default IK Joint problems...

I just made a skeleton w/all the joints and whatnot, but Im having problem with the IK joints. I made a IK joint from the heel, to the hip bone. When I move the heel UP, the knee moves out to the side, instead of moving out/fowards, like it naturally does. Whats causing this?
__________________
- Hybrid
I-Iybrid is offline   Reply With Quote
Old 25-12-2006, 06:32 AM   #2
vladimirjp
Subscriber
 
vladimirjp's Avatar
 
Join Date: Jun 2003
Location: stuck in the 90's boston, USA
Posts: 1,871
Thanks: 0
Thanked 4 Times in 3 Posts
Default

you probably need to set a prefered angle.
but if layed out the joins with a slight bend in the direction it should bend, it shouldnt do that.
unless theres some other problem with the ik solver.
__________________
Image dump
vladimirjp is offline   Reply With Quote
Old 25-12-2006, 06:35 AM   #3
I-Iybrid
Simply Maya OG
 
I-Iybrid's Avatar
 
Join Date: Dec 2002
Location: Queensbury NY, US A
Posts: 1,438
Thanks: 2
Thanked 14 Times in 14 Posts
Default

I layed out the joints straight. Should I go back and add a slight bend in the knee? If not, how do I set a prefered angle? i looked in the attribute editor, but coudnt find ne thing.
__________________
- Hybrid
I-Iybrid is offline   Reply With Quote
Old 25-12-2006, 08:34 PM   #4
NeoStrider
Registered User
 
NeoStrider's Avatar
 
Join Date: Jun 2004
Location: Cleveland, Ohio (USA)
Posts: 1,541
Thanks: 0
Thanked 2 Times in 2 Posts
Default

i'd say go back and add a slight bend in the knee.
__________________
Accept no substitutions.
NeoStrider is offline   Reply With Quote
Old 12-01-2007, 07:52 AM   #5
renderAHH
Registered User
 
Join Date: Nov 2006
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Default

yes, when using IK having a slight bend in the joints will help the the IK solver determine what way its supposed to bend. Also, i noticed that you said you setup an IK from the Heel to the Hip Bone. its best to work down the Hierarchy. with the IK tool selected, click on the hip and then the heel. this will set the effectors to be down at the heel. Also, to help control which way the bend in the IK is facing, i like to use rotateplane IK solvers instead a single chain IK solver. in the AM there a channel for twist to control which way the bend is facing. i like to use a locator, snap it to the knee, then move it forward in Z so that its right in front of the knee a bit. rename the locator left(or)right Pole vector, select the left(or)right polevector and the corresponding Leg IK, and go to >Constrain>Pole Vector. now you can translate the polevector(locator) to move what way the bend in the IK is facing. hope this helps
renderAHH is offline   Reply With Quote
Old 01-02-2007, 02:50 PM   #6
ryokukitsune
Registered User
 
ryokukitsune's Avatar
 
Join Date: Dec 2005
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Default

gime a screen shot with the rig and the hierarchy and a shot of the problem.

(use http://imageshack.us/ to host your images so you dont have to crunch them down so they are illegable.)

it sounds like a combination of things to me. what you have might be the orentation and the prefered angle. where setting the prefered angle might fix it for now your orentations will probibly bite you later when you animate.

(see attatched to check the orentations) X should be pointing to the next joint in the chain either Z or Y should be pointing directly to the side of your joint if this is messed up let me know I'll let you know how to fix it.
Attached Thumbnails
Click image for larger version

Name:	img.gif
Views:	122
Size:	13.4 KB
ID:	32692  
ryokukitsune is offline   Reply With Quote
New Thread

« Previous Thread | Next Thread »

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off

1 Month

$34

Month-to-month billing
$34/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
 
 

3 months

$87

Billing every 3 months
$29/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
Save $5 per month or $15 in total compared to monthly billing with this package.

12 months

$288

Billing every 12 months
$24/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
Save $10 per month or $120 in total compared to monthly billing with this package.

Your plan will automatically renew. You can cancel at any time via your PayPal account to avoid being charged again.

You can view the FAQ on our video plans here. You can contact us directly here. By clicking one of the buttons above, you agree to our Terms and Privacy Policy.