using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using V = Science.Mathematics.VectorCalculus;

namespace VectorCalculus5Ed.Chapter5.Section5
{
    public class Example04
    {
        public Example04()
		{
		}
		private string result;
		public string Result
		{
			get{return result;}
		}
        public void Compute()
        {
            Science.Mathematics.Function.ToLastType<double[], double> f
                = new Science.Mathematics.Function.ToLastType<double[], double>(func);
            double[] from = { -1.0, -1.0, -1.0 };
            double[] to = { 1.0, 1.0, 1.0 };
            V.IntegrationMultiD obj = new V.IntegrationMultiD(f, from, to);
            obj.Compute();
            result += obj.BestEstimation.ToString() + "\r\n";
            obj.NumberOfCall = 10000000;
            obj.Compute();
            result += obj.BestEstimation.ToString() + "\r\n";
            double a = 4.0/3.0*Math.PI;
            result += a.ToString() + "\r\n";
        }
        private double func(double[] x)
        {
            if (x[0]*x[0] + x[1]*x[1] + x[2]*x[2] <= 1.0) return 1.0;
            return 0.0;
        }
    }
}
/* 
4.1885599640021
4.18865799211008
4.18879020478639
*/