vector3 and add /subtract degrees

Archived Forums Questions & Answers
1

I move a game object in the XZ plane by using the Translate

Vector3 startVector = new Vector3(1,0,0);
void Update(){
transform.Translate(startVector *1f*Time.deltaTime);
}

How add or subtract 30,45 degrees to the startVector and get endVector.

I read the FAQ by Quaternion, but did not understand how to do it.
can anyone give an example?

![1]
[1]: http://imageshack.us/photo/my-images/13/vectm.jpg

2

You can multiply a Vector by a quaternion. In your case, you just need to do something simple:

 var startVector = Vector3.right;
 var endVector : Vector3 = Quaternion.AngleAxis(degrees , Vector3.up) * startVector;
 transform.Translate ( endVector * Time.deltaTime);

AngleAxis() constructs a quaternion rotated x degrees around a vector. Then we can multiply the vector by the quaternion to get the end result.