AvalancheTest.cpp

#include "AvalancheTest.h"

//-----------------------------------------------------------------------------

void PrintAvalancheDiagram ( int x, int y, int reps, double scale, int * bins )
{
	const char * symbols = ".123456789X";

	for(int i = 0; i < y; i++)
	{
		printf("[");
		for(int j = 0; j < x; j++)
		{
			int k = (y - i) -1;

			int bin = bins[k + (j*y)];

			double b = double(bin) / double(reps);
			b = fabs(b*2 - 1);

			b *= scale;

			int s = (int)floor(b*10);

			if(s > 10) s = 10;
			if(s < 0) s = 0;

			printf("%c",symbols[s]);
		}

		printf("]\n");
	}
}

//----------------------------------------------------------------------------

double maxBias ( std::vector<int> & counts, int reps )
{
	double worst = 0;

	for(int i = 0; i < (int)counts.size(); i++)
	{
		double c = double(counts[i]) / double(reps);

		double d = fabs(c * 2 - 1);
			
		if(d > worst)
		{
			worst = d;
		}
	}

	return worst;
}

//-----------------------------------------------------------------------------