,Snap rotation relative to rotation

Questions & Answers
1

I’m trying to snap the rotation of my player according to its rotation in 90 degree increments

For example, if I’m facing forward in the scene, 0 Rotation on the y, I want my character to snap to 90 Rotation on the y if it moves to the right.

But if my character is pointing at 45 Rotation, I want the snapping to take that into account, and instead of snapping to 90, I want to snap it to 45+90, or 135 degrees.
Right now, if I’m pointing at 45 Degrees, my character will snap to 90.
169225-2.png

Help please?

2

To add two rotations, multiply their quaternion representations. So, in pseudo code:

Quaternion deg90Rot = Quaternion.AngleAxis( 90, transform.up )
Quaternion currentRot = transform.rotation
transform.rotation = currentRot * deg90Rot

the fist line of code can be stored as class variable and calculated in Start, because you’ll probably use it over and over.