COVID-19_Model/Covid/Form1.cs

using System;
using System.Buffers.Text;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;

namespace Covid
{
    public partial class Form1 : Form
    {
        private Label labelRemoved; // Ìåòêà äëÿ îòîáðàæåíèÿ êîëè÷åñòâà íåéòðàëèçîâàííûõ ñëó÷àåâ
        private Label labelActive; // Ìåòêà äëÿ îòîáðàæåíèÿ êîëè÷åñòâà àêòèâíûõ ñëó÷àåâ
        private Label labelR; // Ìåòêà äëÿ îòîáðàæåíèÿ çíà÷åíèÿ R
        private Label labelDay; // Ìåòêà äëÿ îòîáðàæåíèÿ òåêóùåãî äíÿ
        public enum HealthState { Susceptible, Infected, Recovered, Dead } // Ïåðå÷èñëåíèå ñîñòîÿíèé çäîðîâüÿ
        private PictureBox pictureBoxLeft; // Ëåâûé PictureBox äëÿ ãðàôèêà
        private PictureBox pictureBoxRight; // Ïðàâûé PictureBox äëÿ îòîáðàæåíèÿ ëþäåé

        private List<Person> population = new List<Person>(); // Ñïèñîê ëþäåé
        private const int N = 500; // Óâåëè÷åíî êîëè÷åñòâî íàñåëåíèÿ
        private const float InfectionRadius = 10f; // Ðàäèóñ èíôåêöèè
        private const float ContagionProbability = 0.3f; // Âåðîÿòíîñòü çàðàæåíèÿ
        private const int DiseaseTime = 35; // Âðåìÿ çàáîëåâàíèÿ
        private const float MortalityRate = 0.12f; // Óðîâåíü ñìåðòíîñòè

        private int day = 0; // Òåêóùèé äåíü
        private System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer(); // Òàéìåð äëÿ îáíîâëåíèÿ ñèìóëÿöèè

        private List<int> historyS = new List<int>(); // Èñòîðèÿ óÿçâèìûõ
        private List<int> historyI = new List<int>(); // Èñòîðèÿ èíôèöèðîâàííûõ
        private List<int> historyR = new List<int>(); // Èñòîðèÿ âûçäîðîâåâøèõ
        private List<int> historyD = new List<int>(); // Èñòîðèÿ ïîãèáøèõ

        private Random rand = new Random(); // Ãåíåðàòîð ñëó÷àéíûõ ÷èñåë

        private int newInfectionsThisDay = 0; // Íîâûå èíôåêöèè çà äåíü
        private int infectedCountPreviousDay = 0; // Êîëè÷åñòâî èíôèöèðîâàííûõ íà ïðåäûäóùèé äåíü

        public class Person
        {
            public PointF Position; // Ïîçèöèÿ ÷åëîâåêà
            public PointF Velocity; // Ñêîðîñòü äâèæåíèÿ ÷åëîâåêà
            public HealthState State = HealthState.Susceptible; // Ñîñòîÿíèå çäîðîâüÿ
            public int DaysInfected = 0; // Êîëè÷åñòâî äíåé, â òå÷åíèå êîòîðûõ ÷åëîâåê áûë èíôèöèðîâàí

            private static Random rand = new Random(); // Ãåíåðàòîð ñëó÷àéíûõ ÷èñåë äëÿ êëàññà Person

            public Person(float x, float y) // Êîíñòðóêòîð êëàññà Person
            {
                Position = new PointF(x, y); // Óñòàíîâêà íà÷àëüíîé ïîçèöèè
                Velocity = new PointF(RandomFloat(-1, 1), RandomFloat(-1, 1)); // Óñòàíîâêà ñëó÷àéíîé ñêîðîñòè
            }

            private static float RandomFloat(float min, float max) // Ìåòîä äëÿ ãåíåðàöèè ñëó÷àéíîãî ÷èñëà ñ ïëàâàþùåé çàïÿòîé
            {
                return (float)(rand.NextDouble() * (max - min) + min);
            }

            public void Move(int width, int height) // Ìåòîä äëÿ ïåðåìåùåíèÿ ÷åëîâåêà
            {
                if (State == HealthState.Dead) return; // Åñëè ÷åëîâåê ìåðòâ, íå ïåðåìåùàåì åãî

                Position = new PointF(Position.X + Velocity.X, Position.Y + Velocity.Y); // Îáíîâëåíèå ïîçèöèè

                // Ïðîâåðêà ãðàíèö ýêðàíà è èçìåíåíèå íàïðàâëåíèÿ äâèæåíèÿ
                if (Position.X < 0 || Position.X > width) Velocity = new PointF(-Velocity.X, Velocity.Y);
                if (Position.Y < 0 || Position.Y > height) Velocity = new PointF(Velocity.X, -Velocity.Y);
            }
        }

        public Form1()
        {
            InitializeComponent(); // Èíèöèàëèçàöèÿ êîìïîíåíòîâ ôîðìû
            this.BackColor = Color.Black; // Óñòàíîâêà ôîíà ôîðìû
            this.ForeColor = Color.White; // Óñòàíîâêà öâåòà òåêñòà

            // Èíèöèàëèçàöèÿ PictureBox äëÿ ãðàôèêà
            pictureBoxLeft = new PictureBox
            {
                Name = "pictureBoxLeft",
                Width = 400,
                Height = 400,
                Location = new Point(10, 10),
                BackColor = Color.Black
            };
            pictureBoxLeft.Paint += pictureBoxLeft_Paint; // Ïîäïèñêà íà ñîáûòèå îòðèñîâêè
            this.Controls.Add(pictureBoxLeft); // Äîáàâëåíèå PictureBox íà ôîðìó

            // Èíèöèàëèçàöèÿ PictureBox äëÿ îòîáðàæåíèÿ ëþäåé
            pictureBoxRight = new PictureBox
            {
                Name = "pictureBoxRight",
                Width = 400,
                Height = 400,
                Location = new Point(420, 10),
                BackColor = Color.Black,
                BorderStyle = BorderStyle.FixedSingle // Äîáàâëåíèå áåëîé ãðàíèöû
            };
            pictureBoxRight.Paint += pictureBoxRight_Paint; // Ïîäïèñêà íà ñîáûòèå îòðèñîâêè
            this.Controls.Add(pictureBoxRight); // Äîáàâëåíèå PictureBox íà ôîðìó

            // Ñîçäàíèå íàñåëåíèÿ
            for (int i = 0; i < N; i++)
            {
                float x = rand.Next(pictureBoxRight.Width); // Ñëó÷àéíàÿ ïîçèöèÿ ïî X
                float y = rand.Next(pictureBoxRight.Height); // Ñëó÷àéíàÿ ïîçèöèÿ ïî Y
                population.Add(new Person(x, y)); // Äîáàâëåíèå íîâîãî ÷åëîâåêà â ïîïóëÿöèþ
            }

            // Óñòàíîâêà íà÷àëüíîãî ñîñòîÿíèÿ äëÿ íåñêîëüêèõ èíôèöèðîâàííûõ
            population[0].State = HealthState.Infected;
            population[1].State = HealthState.Infected;
            population[2].State = HealthState.Infected;
            population[3].State = HealthState.Infected;
            population[4].State = HealthState.Infected;
            population[5].State = HealthState.Infected;

            timer.Interval = 200; // Óñòàíîâêà èíòåðâàëà òàéìåðà
            timer.Tick += Timer_Tick; // Ïîäïèñêà íà ñîáûòèå òàéìåðà
            timer.Start(); // Çàïóñê òàéìåðà

            // Èíèöèàëèçàöèÿ ìåòîê äëÿ îòîáðàæåíèÿ ñòàòèñòèêè
            labelRemoved = new Label();
            labelRemoved.Name = "labelRemoved";
            labelRemoved.Text = "# Íåéòðàëèçîâàííûå ñëó÷àè = 0";
            labelRemoved.ForeColor = Color.LightGray;
            labelRemoved.BackColor = Color.Black;
            labelRemoved.AutoSize = true;
            labelRemoved.Font = new Font(this.Font, FontStyle.Regular);

            labelActive = new Label();
            labelActive.Name = "labelActive";
            labelActive.Text = "# Àêòèâíûå ñëó÷àè = 0";
            labelActive.ForeColor = Color.Red;
            labelActive.BackColor = Color.Black;
            labelActive.AutoSize = true;
            labelActive.Font = new Font(this.Font, FontStyle.Bold);

            labelR = new Label();
            labelR.Name = "labelR";
            labelR.Text = "R = 0.00";
            labelR.ForeColor = Color.White;
            labelR.BackColor = Color.Black;
            labelR.AutoSize = true;
            labelR.Font = new Font(this.Font, FontStyle.Italic);

            labelDay = new Label();
            labelDay.Name = "labelDay";
            labelDay.Text = "Äåíü: 0";
            labelDay.ForeColor = Color.White;
            labelDay.BackColor = Color.Black;
            labelDay.AutoSize = true;
            labelDay.Font = new Font(this.Font, FontStyle.Regular);

            // Ðàñïîëîæåíèå ìåòîê ïîä PictureBox
            int spacing = 5;
            labelRemoved.Location = new Point(pictureBoxRight.Left, pictureBoxRight.Bottom + spacing);
            labelActive.Location = new Point(labelRemoved.Right + 20, pictureBoxRight.Bottom + spacing);
            labelR.Location = new Point(pictureBoxRight.Left, labelRemoved.Bottom + spacing + 5);
            labelDay.Location = new Point(pictureBoxRight.Left + pictureBoxRight.Width / 2 - 30, labelRemoved.Bottom + spacing + 5);

            // Äîáàâëåíèå ìåòîê íà ôîðìó
            this.Controls.Add(labelRemoved);
            this.Controls.Add(labelActive);
            this.Controls.Add(labelR);
            this.Controls.Add(labelDay);
        }

        private void Timer_Tick(object sender, EventArgs e) // Ìåòîä, âûçûâàåìûé ïðè êàæäîì òèêå òàéìåðà
        {
            day++; // Óâåëè÷åíèå äíÿ
            newInfectionsThisDay = 0; // Ñáðîñ íîâûõ èíôåêöèé

            // Ïåðåìåùåíèå âñåõ ëþäåé
            foreach (var p in population)
                p.Move(pictureBoxRight.Width, pictureBoxRight.Height);

            // Îáðàáîòêà èíôèöèðîâàííûõ ëþäåé
            foreach (var p in population.Where(p => p.State == HealthState.Infected).ToList())
            {
                p.DaysInfected++; // Óâåëè÷åíèå êîëè÷åñòâà äíåé èíôèöèðîâàíèÿ
                if (p.DaysInfected >= DiseaseTime) // Ïðîâåðêà, äîñòèã ëè ÷åëîâåê ëåòàëüíîãî èñõîäà
                {
                    if (rand.NextDouble() < MortalityRate) // Ïðîâåðêà íà ñìåðòü ÷åëîâåêà
                        p.State = HealthState.Dead;
                    else
                        p.State = HealthState.Recovered; // Èçìåíåíèå ñîñòîÿíèÿ íà "âûëå÷åííûé"
                }
            }

            InfectNearby(); // Èñïîëüçóåì ìåòîä çàðàæåíèÿ ðÿäîì îêðóæàþùèõ ëþäåé

            // Ïîäñ÷åò ñòàòèñòèêè
            int sCount = population.Count(p => p.State == HealthState.Susceptible);
            int iCount = population.Count(p => p.State == HealthState.Infected);
            int rCount = population.Count(p => p.State == HealthState.Recovered);
            int dCount = population.Count(p => p.State == HealthState.Dead);

            // Ñîõðàíåíèå èñòîðèè
            historyS.Add(sCount);
            historyI.Add(iCount);
            historyR.Add(rCount);
            historyD.Add(dCount);

            // Îáíîâëåíèå R
            float R = infectedCountPreviousDay > 0 ? (float) newInfectionsThisDay / infectedCountPreviousDay : 0f;
            infectedCountPreviousDay = iCount; // Îáíîâëåíèå êîëè÷åñòâà èíôèöèðîâàííûõ íà ïðåäûäóùèé äåíü

            // Îáíîâëåíèå Tag äëÿ îòðèñîâêè
            pictureBoxRight.Tag = new { Active = iCount, Removed = rCount + dCount, R = R, Day = day };

            // Îáíîâëåíèå òåêñòà ìåòîê
            labelRemoved.Text = $"# Íåéòðàëèçîâàííûå ñëó÷àè = {rCount + dCount}";
            labelActive.Text = $"#                            Àêòèâíûå ñëó÷àè = {iCount}";
            labelR.Text = $"R = {R:F2}";
            labelDay.Text = $"Äåíü: {day}";
            pictureBoxLeft.Invalidate(); // Ïåðåðèñîâêà ëåâîãî PictureBox
            pictureBoxRight.Invalidate(); // Ïåðåðèñîâêà ïðàâîãî PictureBox
        }

        private void InfectNearby() // Ìåòîä äëÿ çàðàæåíèÿ ñîñåäåé
        {
            var infected = population.Where(p => p.State == HealthState.Infected).ToList(); // Ñïèñîê èíôèöèðîâàííûõ
            var susceptible = population.Where(p => p.State == HealthState.Susceptible).ToList(); // Ñïèñîê óÿçâèìûõ

            // Ïðîâåðêà ðàññòîÿíèÿ ìåæäó èíôèöèðîâàííûìè è óÿçâèìûìè
            foreach (var inf in infected)
            {
                foreach (var sus in susceptible)
                {
                    float dist = Distance(inf.Position, sus.Position); // Âû÷èñëåíèå ðàññòîÿíèÿ
                    if (dist < InfectionRadius) // Åñëè â ïðåäåëàõ ðàäèóñà èíôåêöèè
                    {
                        if (rand.NextDouble() < ContagionProbability) // Ïðîâåðêà íà çàðàæåíèå
                        {
                            sus.State = HealthState.Infected; // Èçìåíåíèå ñîñòîÿíèÿ íà èíôèöèðîâàííûé
                            newInfectionsThisDay++; // Óâåëè÷åíèå ñ÷åò÷èêà íîâûõ èíôåêöèé
                        }
                    }
                }
            }
        }

        private float Distance(PointF a, PointF b) // Ìåòîä äëÿ âû÷èñëåíèÿ ðàññòîÿíèÿ ìåæäó äâóìÿ òî÷êàìè
        {
            float dx = a.X - b.X; // Ðàçíîñòü ïî X
            float dy = a.Y - b.Y; // Ðàçíîñòü ïî Y
            return (float)Math.Sqrt(dx * dx + dy * dy); // Âîçâðàùåíèå ðàññòîÿíèÿ
        }

        private void pictureBoxLeft_Paint(object sender, PaintEventArgs e) // Ìåòîä äëÿ îòðèñîâêè ãðàôèêà
        {
            Graphics g = e.Graphics;
            g.Clear(Color.Black); // Î÷èñòêà ôîíà

            if (historyS.Count < 2) return; // Åñëè íåäîñòàòî÷íî äàííûõ äëÿ îòðèñîâêè

            int w = pictureBoxLeft.Width; // Øèðèíà PictureBox
            int h = pictureBoxLeft.Height; // Âûñîòà PictureBox

            int maxY = population.Count; // Ìàêñèìàëüíîå çíà÷åíèå ïî Y

            Pen axisPen = Pens.White; // Ïåðî äëÿ îñåé
            g.DrawLine(axisPen, 40, 10, 40, h - 30); // Âåðòèêàëüíàÿ îñü
            g.DrawLine(axisPen, 40, h - 30, w - 10, h - 30); // Ãîðèçîíòàëüíàÿ îñü

            // Îòðèñîâêà ëèíèé ãðàôèêà äëÿ ðàçëè÷íûõ ñîñòîÿíèé
            DrawGraphLine(g, historyS, maxY, Color.Cyan, 40, h - 30, w - 50, h - 40);
            DrawGraphLine(g, historyI, maxY, Color.Red, 40, h - 30, w - 50, h - 40);
            DrawGraphLine(g, historyR, maxY, Color.Green, 40, h - 30, w - 50, h - 40);
            DrawGraphLine(g, historyD, maxY, Color.Gray, 40, h - 30, w - 50, h - 40);

            // Ïîäïèñè äëÿ ãðàôèêà
            g.DrawString("Óÿçâèìûå", this.Font, Brushes.Cyan, w - 130, 20);
            g.DrawString("Èíôèöèðîâàííûå", this.Font, Brushes.Red, w - 130, 40);
            g.DrawString("Âûëå÷åííûå", this.Font, Brushes.Green, w - 130, 60);
            g.DrawString("Ïîãèáøèå", this.Font, Brushes.Gray, w - 130, 80);
        }

        private void DrawGraphLine(Graphics g, List<int> data, int maxY, Color color, int x0, int y0, int width, int height) // Ìåòîä äëÿ îòðèñîâêè ëèíèè ãðàôèêà
        {
            if (data.Count < 2) return; // Åñëè íåäîñòàòî÷íî äàííûõ äëÿ îòðèñîâêè

            Pen pen = new Pen(color, 2); // Ïåðî äëÿ ëèíèè
            int count = data.Count; // Êîëè÷åñòâî òî÷åê
            float xStep = (float)width / (count - 1); // Øàã ïî X

            PointF[] points = new PointF[count]; // Ìàññèâ òî÷åê äëÿ ëèíèè
            for (int i = 0; i < count; i++)
            {
                float x = x0 + i * xStep; // Âû÷èñëåíèå êîîðäèíàòû X
                float y = y0 - (data[i] / (float)maxY) * height; // Âû÷èñëåíèå êîîðäèíàòû Y
                points[i] = new PointF(x, y); // Äîáàâëåíèå òî÷êè â ìàññèâ
            }

            g.DrawLines(pen, points); // Îòðèñîâêà ëèíèè
        }

        private void pictureBoxRight_Paint(object sender, PaintEventArgs e) // Ìåòîä äëÿ îòðèñîâêè ëþäåé
        {
            Graphics g = e.Graphics;
            g.Clear(Color.Black); // Î÷èñòêà ôîíà

            // Îòðèñîâêà êàæäîãî ÷åëîâåêà â çàâèñèìîñòè îò åãî ñîñòîÿíèÿ
            foreach (var p in population)
            {
                Color c = p.State switch
                {
                    HealthState.Susceptible => Color.Cyan,
                    HealthState.Infected => Color.Red,
                    HealthState.Recovered => Color.Green,
                    HealthState.Dead => Color.Gray,
                    _ => Color.White
                };
                g.FillEllipse(new SolidBrush(c), p.Position.X, p.Position.Y, 5, 5); // Îòðèñîâêà ÷åëîâåêà
            }
        }
    }
}