private double extrapolate(Seed seed, int xsb, int ysb, int zsb, double dx, double dy, double dz)
{
var index = seed.Get(xsb, ysb, zsb);
var a = gradients3D[index] * dx
+ gradients3D[index + 1] * dy
+ gradients3D[index + 2] * dz;
return a;
}
private double extrapolate(Seed seed, int xsb, int ysb, double dx, double dy)
{
var seedIndex = seed.Get(xsb, ysb) & 0x0E;
return gradients2D[seedIndex] * dx
+ gradients2D[seedIndex + 1] * dy;
}