Unity, rotating a Vector3 along an axis

Question

For example, I have a Vector3 and I waant to rotate it relatively Y-axis (Vector3.up). Can I do it using built-in methods, or should I use coordinate geometry and trigonometry?

Answer 1

You can use Quaternions to rotate vectors.

For example, to rotate a source vector by 30 degrees the way you want, you can use AngleAxis() :

Vector3 v = Quaternion.AngleAxis(-30, Vector3.up) * sourceVect;