double mag()
This function returns the magnitude of the vector in the 2D XY plane.
Explanation
This function solves the pythagorean theorem for the c term (the distance):
$ l = \sqrt{x^2 + y^2} $
Returns
A double that holds the 2d length of the vector.
Examples
PVector v = PVector(1, 1);
v.mag(); // Returns sqrt(2)
PVector v2 = PVector(1, 1, 1);
v2.mag(); // Still returns sqrt(2)
PVector v3 = PVector(3, 4);
v3.mag(); // Returns 5