sc4 function
Implementation
double sc4(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[7]) - (r * MAGIC[1])), z + ((r * MAGIC[1]) + (r * MAGIC[7]))))
+(n.noise2(x + ((r * MAGIC[3]) - (r * MAGIC[2])), z + ((r * MAGIC[2]) + (r * MAGIC[3]))))
+(n.noise2(x + ((r * MAGIC[8]) - (r * MAGIC[3])), z + ((r * MAGIC[3]) + (r * MAGIC[8])))))*0.25;
}