NinaP opened this issue on May 01, 2024 ยท 5 posts
NinaP posted Wed, 01 May 2024 at 1:31 PM
Hi,
I am a beginner trying to create a "simple" animation where I would like to have the Hand and Forearm locked in position while moving the hip up and down using IK.
Since the goal of the IK (default) is set to the Hand (the last item in the chain) the forearm keeps moving.
- I tried to remove the hand from the skeleton but it always deleted the figure.
- I tried to parent the hand to another body part which caused Poser to crash.
- I tried to animate it and remove the keyframes for arm and hand just resulting in weird movements.
I really would appreciate any hints on what I am doing wrong, or if it is even possible with Poser?
kind regards
Nina
hborre posted Wed, 01 May 2024 at 7:37 PM
From what I can determine, it isn't possible to lock the forearms and attempt the animation you want to perform. The body dynamics do not allow those body parts to remain immobile throughout the motion. Someone most familiar with animation cheats might steer you in the right direction, if possible.
nerd posted Thu, 02 May 2024 at 2:57 PM Forum Moderator
Create a new IK chain that's just the shoulder and the forearm in the goal. Enable that IK instead of the regular hand IK hands.
The manual covers creating IK chains here: https://www.posersoftware.com/documentation/13/index.htm#t=Poser_Reference_Manual%2FTools%2FEditors%2FCreating_IK_Chains.htm%23h&rhsearch=inverse%20kinematic
It's a drag n' drop operation. Click create chain in the Hierarchy Editor. Then, drag the chain pieces in order from beginning to goal. (Shoulder then forearm)
Another tool that you may find useful is the constraint groups. If you add a constraint to the IK goal you can use multiple constraints and turn them on and off during the animation. This has the affect of being able to change the IK goal in the middle of an animation.
Crash from parenting an IK goal ... that's worrying. If you can reproduce that please file a ticket in support with the steps you used.
NinaP posted Thu, 02 May 2024 at 3:36 PM
Thank you so much! I found the documentation, but I was doing it wrong (I started adding the forearm which messed up the mesh).
Is this the right chapter on the constraint groups? I will dig through that. I will try to reproduce the crash and file a ticket.
Have an awesome day!
nerd posted Fri, 03 May 2024 at 4:21 AM Forum Moderator
Yes that the stuff. These might be helpful too:
https://www.youtube.com/watch?v=8MD_DS0ZdGQ
https://www.youtube.com/watch?v=_vVajv4AhME