1 using System; 2 using System.Collections.Generic; 3 using System.IO; 4 using System.Linq; 5 using System.Text; 6 using System.Threading.Tasks; 7  8 namespace appbigdata 9 {10     class ParticlesGenerator11     {12 13         public void GenerateParticles(int count)14         {15             String fileName = @"C:\opengl\data\random.xyz";16             int seed = (int)(System.DateTime.Now.Ticks / 1000);17             Random random = new Random(seed);18 19             StreamWriter writer = new StreamWriter(fileName);20             try21             {22                 writer.WriteLine(count);23                 writer.WriteLine("Random Particles");24                 String[] particleTypes = new String[] { "C", "H" };25                 int maxValue = count;26                 for (int i = 0; i < count; i++)27                 {28                     double x = random.Next(maxValue) * 0.01;29                     double y = random.Next(maxValue) * 0.01;30                     double z = random.Next(maxValue) * 0.001;31                     double v = random.NextDouble();32                     int index = v >= 0.5d ? 0 : 1;33                     writer.WriteLine(String.Format("{0} {1} {2} {3}", particleTypes[index], x, y, z));34                 }35             }36             finally37             {38                 writer.Close();39             }40             System.Console.WriteLine(String.Format("save to:{0}", fileName));41 42 43         }44     }45 }