资源生成

package com.jleo.pickitup;

public class Norm{
	public static double normrnd(double mu, double sigma) {
		double N = 12;
		double x = 0, temp = N;
		do {
			x = 0;
			for (int i = 0; i < N; i++)
				x = x + (Math.random());
			x = (x - temp / 2) / (Math.sqrt(temp / 12));
			x = mu + x * Math.sqrt(sigma);
		} while (x <= 0);
		return x;
	}

	public static double[] addInv(double[] r) {
		double[] result = new double[r.length * 2];
		for (int i = 0; i < result.length; i += 2) {
			result[i] = r[i / 2];
			result[i + 1] = -r[i / 2];
		}
		return result;
	}

	public static double[] normrnd(double sigma, int num) {
		double[] r = new double[num];
		for (int i = 0; i < num; i++) {
			r[i] = normrnd(0, sigma);
		}
		return addInv(r);
	}

	public static Point[] generateMap(int x1, int x2, int y1, int y2) {
		int numberOfDots = 5000;
		double mu = 3;
		double sigma = 1;

		int[] x = new int[numberOfDots];
		int[] y = new int[numberOfDots];

		Point[] points = new Point[numberOfDots];
		for (int i = 0; i < numberOfDots; i++) {
			x[i] = (int) ((normrnd(mu, sigma)-3)*((x2-x1)/6)+(x1+x2)/2);
			y[i] = (int) ((normrnd(mu, sigma)-3)*((y2-y1)/6)+(y1+y2)/2);
			points[i] = new Point(x[i], y[i]);
		}
		return points;
	}

	public static void main(String[] args) {
		Norm.generateMap(31095278,31334871,121256104,121629639);
	}
}