/*
 * Created on 2005-02-10
 * 
 * TODO To change the template for this generated file go to Window -
 * Preferences - Java - Code Style - Code Templates
 */

//package com.nano.KangooJumper;

import java.util.*;

/**
 * @author plumkawka
 * 
 * TODO To change the template for this generated type comment go to Window -
 * Preferences - Java - Code Style - Code Templates
 */
public class Math
{

	//
	// wartosc bezwzgleda
	//
	public static int Abs(int x)
	{
		if (x < 0)
			return -x;
		else
			return x;
	}

	private static Random	rand	= new Random();



	//
	// losowa z przedzialu
	//
	public static int Rand(int min, int max)
	{
		int delta = max - min;

		if (delta <= 0)
			delta = 1;

		int r = (int) rand.nextInt();

		if (r < 0)
			r = -r;

		return (r % delta) + min;
	}



	public static int Rand(int mask)
	{
		return ((int) rand.nextInt() & mask);
	}



	public static boolean RandBool()
	{
		if ((rand.nextInt() & 1) == 0)
			return true;
		return false;
	}



	//
	//	 sqrt (dx*dx + dy*dy)
	//
	public static int vecLen(int dx, int dy)
	{
		int min, max, approx;

		if (dx < 0)
			dx = -dx;
		if (dy < 0)
			dy = -dy;

		if (dx < dy)
		{
			min = dx;
			max = dy;
		}
		else
		{
			min = dy;
			max = dx;
		}

		approx = (max * 1007) + (min * 441);
		if (max < (min << 4))
			approx -= (max * 40);

		return ((approx + 512) >> 10);
	}
}