noise4XYZBeforeW method
4D OpenSimplex2F noise, with XYZ oriented like noise3Classic, and W for an extra degree of freedom. W repeats eventually.
Recommended for time-varied animations which texture a 3D object (W=time)
Implementation
@override
double noise4XYZBeforeW(double x, double y, double z, double w) {
double xyz = x + y + z;
double ww = w * 0.2236067977499788;
double s2 = xyz * -0.16666666666666666 + ww;
double xs = x + s2, ys = y + s2, zs = z + s2, ws = -0.5 * xyz + ww;
return _noise4Base(xs, ys, zs, ws);
}