Angle between two Vectors 2D

Question

I\'m trying to compute the angle between two vectors. I tried this, but it always returns zero:

public double GetAngle(Vector2 a, Vector2 b)
{
double angle = Mat         


        

Answer 1

since you use vector2 class, I guess you can use

a-b

to get the vector from a to b.

so the angle you need is: Pi - angle(a-b).