Head rotation using blend tree and script

Unity Engine
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1

I have a blend tree that controls the head rotation, and I want it to look wherever the camera is pointing relative to the player. It has 2 parameters(LookX, LookY), and I’m not sure how I can do this. I know you can use IK for this but doing it like this gives me more control and IK can look really weird at times.
You can see the setup here.

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I have a video that kinda shows how it should look here - https://drive.google.com/file/d/13RUh-7JuqLPGND4zshqExSBBmYiNqeI0/view?usp=sharing

2

What part isn’t working exactly? I watched the video and it seems to be blending between the animations. Do you mean you’re not sure how to script the actual calculation to set lookX and lookY to?

3
  1. Find max degrees for the turn relative to forward, lets say its 90.
  2. Find the degrees from character-forward direction to the camera-forward direction. (Vector3.SignedAngle())
  3. Normalize the degrees you have now to be 0-1.
  4. Push the normalized value into the animator parameter. (Animator.SetFloat())
4

it’s the calculations that I am having troubles with.

5

I’m not really sure how to do steps 2 and 3, I tried this bit of code here
float headDirX = Vector3.SignedAngle(headLook.forward, transform.forward, Vector3.forward);
and when I go to debug log it it works when the camera is positioned behind, but it kinds combines the x and y axis so from the front(when x is closer to 0 and y is closer to 180) it doesn’t work. This kind of math isn’t my strongsuit so I don’t really know what this function is doing so I’m probably using it horribly wrong though.