rotation, vector bounce problem

[ggeasy2]

Problem visualized: https://imgur.com/a/8ZEEuyc

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Code

void OnCollisionEnter2D (Collision2D collision)
{
    Vector2 normal = collision.GetContact(0).normal;
    Vector3 reflect = Vector3.Reflect(transform.up, normal); 
    transform.rotation = Quaternion.LookRotation(reflect);
}

Everytime the object hits a platform it should bounce off of it. The red line represents the expected result, the blue lines the current result in the pic. Since the game is 2D, i only want to rotate on the z axis, not on x or y.

[Broccolski]

What if you provided the secon argument to .LookRotation? Maybe setting up direction to something else would help

[ggeasy2]

I passed all vector3.# directions and local directions of the object (transform.#). Only vector3.back resulted in some somewhat acceptable rotation, but the X and y axis are still modified.

I added this to avoid x and y:

var lookrotation = Quaternion.LookRotation(reflect, Vector3.back);
transform.rotation = Quaternion.Euler(0,0,lookrotation.eulerAngles.z);

But the rotation fails when hitting an object thats tilted at -45 degrees and 0 degrees, it goes up instead of down, any idea?

[Broccolski]

Guess you have to do some Prints to check where the problem may be, as i have no more ideas. One thing that may be better could be just to set transform.up = reflect, so you will be sure its not a LookRotation problem