noise3 method

@override double noise3(double x, double y, double z)

Implementation

@override
double noise3(double x, double y, double z) {
  int x0 = floor(x);
  int y0 = floor(y);
  int z0 = floor(z);
  int x1 = x0 + 1;
  int y1 = y0 + 1;
  int z1 = z0 + 1;
  double xs = 0, ys = 0, zs = 0;
  xs = interpHermiteFunc(x - x0);
  ys = interpHermiteFunc(y - y0);
  zs = interpHermiteFunc(z - z0);
  double xd0 = x - x0;
  double yd0 = y - y0;
  double zd0 = z - z0;
  double xd1 = xd0 - 1;
  double yd1 = yd0 - 1;
  double zd1 = zd0 - 1;
  double xf00 = lerp(gradCoord3D(seed, x0, y0, z0, xd0, yd0, zd0),
      gradCoord3D(seed, x1, y0, z0, xd1, yd0, zd0), xs);
  double xf10 = lerp(gradCoord3D(seed, x0, y1, z0, xd0, yd1, zd0),
      gradCoord3D(seed, x1, y1, z0, xd1, yd1, zd0), xs);
  double xf01 = lerp(gradCoord3D(seed, x0, y0, z1, xd0, yd0, zd1),
      gradCoord3D(seed, x1, y0, z1, xd1, yd0, zd1), xs);
  double xf11 = lerp(gradCoord3D(seed, x0, y1, z1, xd0, yd1, zd1),
      gradCoord3D(seed, x1, y1, z1, xd1, yd1, zd1), xs);
  double yf0 = lerp(xf00, xf10, ys);
  double yf1 = lerp(xf01, xf11, ys);
  return lerp(yf0, yf1, zs);
}