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Form1.cs
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Form1.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace app2
{
public partial class Form1 : Form
{
private Random random;
private int nrCentroizi;
private List<Double> distantaPunctCentroid;
private List<Centroid> centroizi;
private List<Coordonate> puncte;
private Graphics g;
private Bitmap bitmap;
private Double cost;
public Form1()
{
InitializeComponent();
}
private void antrenareBtn_Click(object sender, EventArgs e)
{
//se alege un numar random de centroizi
random = new Random();
nrCentroizi = random.Next(2, 10);
distantaPunctCentroid = new List<double>();
centroizi = new List<Centroid>();
puncte = new List<Coordonate>();
cost = 0;
//pentru fiecare centroid generam coordonate:
for (int i = 0; i < nrCentroizi; i++)
{
int xPunct = random.Next(0, 600);
int yPunct = random.Next(0, 600);
centroizi.Add(new Centroid(xPunct, yPunct));
//centroizi.Add(new Coordonate { x = xPunct, y = yPunct });
}
//luam coordonatele punctelor din fisierul generat de prima aplicatie:
string path = @"E:\Facultate\coordonate.txt";
const Int32 BufferSize = 128;
using (var fileStream = File.OpenRead(path))
using (var streamReader = new StreamReader(fileStream, Encoding.UTF8, true, BufferSize))
{
String line;
while ((line = streamReader.ReadLine()) != null)
{
string[] bits = line.Split(' ');
int xPunct = int.Parse(bits[1]);
int yPunct = int.Parse(bits[3]);
puncte.Add(new Coordonate(xPunct, yPunct));
}
}
//creem un bitmap unde urmeaza sa desenam sistemul de coordonate, centroizii si punctele:
bitmap = new Bitmap(600, 600);
g = Graphics.FromImage(bitmap);
g.Clear(Color.White);
//desenam sistemul de coordonate:
DesenareInitiala();
//desenam punctele si centroizii:
Desenare();
}
private void DesenareInitiala()
{
Point p1 = new Point(0, 300);
Point p2 = new Point(600, 300);
Point p3 = new Point(300, 0);
Point p4 = new Point(300, 600);
Pen pen = new Pen(Color.Black);
g.DrawLine(pen, p1, p2);
g.DrawLine(pen, p3, p4);
}
private void Desenare()
{
foreach (var centroid in centroizi)
{
int radius = 3;
g.FillEllipse(Brushes.Red, centroid.coordonateCentroid.x, centroid.coordonateCentroid.y, 2 * radius, 2 * radius);
}
foreach (var punct in puncte)
{
bitmap.SetPixel(punct.x + 300, punct.y + 300, Color.Black);
}
pictureBox1.Image = bitmap;
Refresh();
}
private void Similaritate()
{
double distanta;
foreach (var punct in puncte)
{
double minim = Double.MaxValue; //aici retinem distanta minima
int centroidApropiat = 0; //salvam numaruul centroidului cel mai apropiat
for (int i = 0; i < nrCentroizi; i++)
{
distanta = Math.Sqrt(Math.Pow(centroizi[i].coordonateCentroid.x - punct.x, 2) + Math.Pow(centroizi[i].coordonateCentroid.y - punct.y, 2));
if (distanta > minim)
{
minim = distanta;
centroidApropiat = i;
}
}
centroizi[centroidApropiat].punctSimilar.Add(punct);
distantaPunctCentroid.Add(minim);
}
}
private void RedesenareCentroizi()
{
foreach (var centroid in centroizi)
{
int sumaX = 0;
int sumaY = 0;
if (!centroid.punctSimilar.Count.Equals(0))
{
foreach (var punctApropiat in centroid.punctSimilar)
{
sumaX += punctApropiat.x;
sumaY += punctApropiat.y;
}
centroid.coordonateCentroid.x = sumaX / centroid.punctSimilar.Count;
centroid.coordonateCentroid.y = sumaY / centroid.punctSimilar.Count;
}
}
foreach (var centroid in centroizi)
{
int radius = 4;
g.FillEllipse(Brushes.Aquamarine, centroid.coordonateCentroid.x - radius, centroid.coordonateCentroid.y, 2 * radius, 2 * radius);
}
CalculeazaCost();
}
private double CalculeazaCost()
{
double costNou = 0;
for (int i = 0; i < distantaPunctCentroid.Count; i++)
{
costNou += distantaPunctCentroid[i];
}
return costNou;
}
private void testareBtn_Click(object sender, EventArgs e)
{
Similaritate();
while (CalculeazaCost() != cost) {
cost = CalculeazaCost();
}
RedesenareCentroizi();
Refresh();
}
}
}