Need very specific help with Quaternions

I need to make a character to always stand up against an artificial Gravity Vector.

The artificial gravity source can be anywhere and any angle/vector.

When I am inside the trigger collider of the gravity source, I want my character to slowly "stand up", meaning its feet pointing towards the floor, even if not touching, while keeping its rotation around its local Y axis to keep looking approximately in the same direction.

I have a script attached to my character gameObject.

By now I achieved to make the character to stand up against the global Vector3.up, I simply need help with doing it against a specific vector.

Here's the part of this script I need help with :

Code (csharp):

1.  
2.  Vector3 gravityVector = artificialGravitySource.transform.up; // unused for now...
3.  
4.  Quaternion startRotation = transform.rotation;
5.  Quaternion endRotation = new Quaternion (0, transform.rotation.y, 0, transform.rotation.w);
6.  
7.  transform.rotation = Quaternion.RotateTowards(startRotation, endRotation, 100 * Time.deltaTime);
8.  

I need to set my endRotation according to gravityVector, keeping my local y rotation.

Thank you for your help.

 

Hello,

I think there different way to achieve that, i will try :

Code (csharp):

1.  
2. // - init rotation movement
3. Vector3 charDir = charDir.up;
4. Vector3 targetDir = artificialGravitySource.transform.up;
5. Quaternion targetRotation= Quaternion.FromToRotation(charDir ,targetDir );
6.  
7. // - rotation movement (in update function or a coroutine)
8. transform.rotation = Quaternion.Lerp(transform.rotation,targetRotation, Time.time * speed);
9.  

 

This is not working for me... unless I don't understand how to implement it well..

I need a very simple solution to rotate towards the gravity vector... Something like multiplying my endRotation with my gravityVector..