Rotate direction with x degrees

Hello All,

I get a direction from two Vector3, and I would like to get another direction wich is based on this direction but rotated with x degrees.

Can somebody help me to get the green direction vector? (example in attachment)


Thank you!

 

This is pretty straightforward. You can multiply a vector with a quaternion in order to rotate it. Always multiply a quaternion with a vector; it doesn't work the other way around.

Code (csharp):

1.  
2. Quaternion rotation = Quaternion.AngleAxis(degrees,Vector3.up);
3. Vector3 green = rotation*red;
4.  

I assume you want to rotate it around the y-axis. If you want to rotate it around another axis, use Vector3.forward and Vector3.left for the x and z axes. I don't remember which is which.

Also, if you only want to get a vector that's rotated 90 degrees, you can use Vector3.Cross.

 

Thank you very much, it's working!