noise2 method

@override double noise2(double x, double y)

2D SuperSimplex noise, standard lattice orientation.

Implementation

@override
double noise2(double x, double y) {
  // Get points for A2* lattice
  double s = 0.366025403784439 * (x + y);
  double xs = x + s, ys = y + s;

  return _noise2Base(xs, ys);
}