Question Execute code after the animator update but before IK happens.

Hi,

Currently, I am using 2D animation with 2D IK. To make the foot IK, I have to adjust the position of the foot target after the frame of the animation. I have tried LateUpdate. Unfortunately, LateUpdate is called after the IK has been applied...
I have already tried many possibilities.

Code (CSharp):

1. public class IKAnimationPhysics : MonoBehaviour
2. {
3.     [SerializeField] Transform raycastY = null;
4.     [SerializeField] Transform[] legs = null;
5.     [SerializeField] LayerMask IKLayer = new LayerMask();
6.    
7.     private void LateUpdate() {
8.         foreach (Transform leg in legs) {
9.             RaycastHit2D hit = Physics2D.Raycast(new Vector2(leg.transform.position.x, raycastY.position.y),
10.                 Vector2.down,
11.                 Mathf.Infinity,
12.                 IKLayer);
13.             if (hit.transform == null) continue;
14.            
15.             if(hit.point.y > leg.position.y)
16.                 leg.position = new Vector2(leg.position.x, hit.point.y);
17.         }
18.     }

 

Hi.
Here is the way I solved this problem :

• Create a second IK solver, with the same effector (same foot transform in your case) and with its own target.

• Put this 2nd IK just below the 1st in the hierarchy, in order to make it override the 1st one by the IK Manager.

• Disable the 2nd IK.

• Get a reference of this 2nd IK gameobject in a script.

• Now, when you want to override the 1st IK (because foot on ground for example), just enable the 2nd IK and modify its target.
• Don't forget to disable it when no override needed.

In my project, I set the target as the IK object itself so I have the same reference for move or enable purposes.

I hope there will be some new features in the future, to make it more convenient, like the IK Pass system for 3D humanoid rigging...

Hope it helped