My IK Chains won't follow the target when it's moving around

GGantorn · 6 Şub

Hi everyone, my name's Adam and I'm a bit new to the Spine 2D rigging scene. I've been trying to make a rig for a double jointed leg with IK and I've been struggling to get it to work fully as intended.

As I want all joints to move and bend when moving either body or foot I set up the heel as the target of two IK chains allowing the knee to bend as a normal IK rig.

https://esotericsoftware.com/forum/assets/files/2025-02-06/1738836460-757006-2025-02-06-10-33-28.mkv

However in order to get the heel to move aswell I set up another IK from the foot to the body with a point in the bend which the Heel IK target could follow, which it does as seen in the video. The problem is that despite the IK target moving, the IK chains remain pointed to the original position of the target. Does anyone know how I can fix it so they follow the target when it moves or is this impossible? And if this isn't a good way to do it, are there any other ways to get the desired results?

Thanks in advance!

Spinebot · 6 Şub

It seems like the issue you're experiencing with your IK chains not following the target could be related to the setup of your IK constraints. One common problem is having the IK target as a child of the bones affected by the IK, which can cause the target to not move as expected. Make sure that the IK target is not a child of the constrained bones. Additionally, ensure that the order of constraints is correct, as the order can affect how the constraints are applied. You might also want to check if the IK mix value is set correctly, as it controls how much the IK constraint affects the bones. If the mix is not set to 100%, the bones may not fully follow the target. You can refer to examples like the Spineboy setup to see how constraints are ordered and applied.

GGantorn · 6 Şub

Spinebot I completly forgot the constraint order, thanks!