sc2 function
Implementation
double sc2(double x, double z, double r, NoisePlane n) {
return ((n.noise2(x + ((r * MAGIC[1]) - (r * MAGIC[0])), z + ((r * MAGIC[0]) + (r * MAGIC[1]))))
+(n.noise2(x + ((r * MAGIC[3]) - (r * MAGIC[2])), z + ((r * MAGIC[2]) + (r * MAGIC[3])))))*0.5;
}