Graph.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Test_Alpha_govnokod_
{
    public partial class Graph : Form
    {
        Form2 logger = new Form2();
        double alpha, Vx0, Vy0, Vx, Vy, V0, l, H , t1, t2, Y2, time;

        private void button2_Click(object sender, EventArgs e)
        {
            System.Drawing.Graphics formGraphics = this.CreateGraphics();
            System.Drawing.Pen myPen;
            System.Drawing.Pen myPen1;
            myPen = new System.Drawing.Pen(System.Drawing.Color.Red);
            myPen1 = new System.Drawing.Pen(System.Drawing.Color.Gray);

            formGraphics.Clear(Color.WhiteSmoke);
            Graph_Load(sender, e);
        }

        private void label9_Click(object sender, EventArgs e)
        {

        }

        double g = 9.81;
        int x1, x2, x3, x4, x5, y1, y2, y3, y4, y5 ,
            X0 = 40 ,Y0 = 400;

        public void trackBar1_Scroll(object sender, EventArgs e)
        {
           alpha = trackBar1.Value;
            label1.Text = ("Grad: " + alpha.ToString()); 

        }

        int GraphX, GraphY, X, Y;

        private void Graph_Load(object sender, EventArgs e)
        {
            System.Drawing.Graphics formGraphics = this.CreateGraphics();
            System.Drawing.Pen myPen;
            System.Drawing.Pen myPen1;
            myPen = new System.Drawing.Pen(System.Drawing.Color.Red);
            myPen1 = new System.Drawing.Pen(System.Drawing.Color.Gray);


            System.Drawing.Pen mainPen;
            mainPen = new System.Drawing.Pen(System.Drawing.Color.Black);
            formGraphics.DrawLine(myPen1, 500, 400, 500, 40);
            formGraphics.DrawLine(mainPen, 40, 400, 500, 400);
            formGraphics.DrawLine(mainPen, 40, 400, 40, 40);
            GraphX = 40;
            GraphY = 40;
            while (GraphX < 500)
            {
                GraphX += 10;
                formGraphics.DrawLine(myPen1, GraphX, 400, GraphX, 40);
            }
            while (GraphY < 400)
            {


                formGraphics.DrawLine(myPen1, 40, GraphY, 500, GraphY);
                GraphY += 10;

            }
        }
        public Graph()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            //logger.Show();

            if (textBox1.Text == "")
            {
                MessageBox.Show("Error!");
            }
            else if (Int32.Parse(textBox1.Text) > 21)
            {
                MessageBox.Show("max speed - 20 m/s");
            }
            else
            {

          
                //Graph
                System.Drawing.Graphics formGraphics = this.CreateGraphics();
                System.Drawing.Pen myPen;
                System.Drawing.Pen myPen1;
                myPen = new System.Drawing.Pen(System.Drawing.Color.Red);
                myPen1 = new System.Drawing.Pen(System.Drawing.Color.Gray);
                System.Drawing.Pen mainPen;
                mainPen = new System.Drawing.Pen(System.Drawing.Color.Black);
                //Math

                //Vy0 and Vx0
                V0 = Int32.Parse(textBox1.Text);
                Vy0 = (V0 * (Math.Sin((alpha / 180D) * Math.PI)));
                label3.Text = Vy0.ToString();

                Vx0 = (V0 * (Math.Cos((alpha / 180D) * Math.PI)));
                label4.Text = Vx0.ToString();

                //L - max

                l = ((V0 * V0 * (Math.Sin(((2 * alpha) / 180D) * Math.PI))) / g);
                label5.Text = "L - " + l.ToString() + "m";
                double l1 = l * 10;
                //logger.ButLog("l = " + l1.ToString());
                //H-max

                H = ((V0 * V0 * (Math.Pow((Math.Sin((alpha / 180D) * Math.PI)), 2))) / 20 * g);
                label6.Text = ("H - " + H.ToString() + "m");

                //logger.ButLog("H = " + H.ToString());

                x5 = ((40 + Convert.ToInt32(l1)));
                //logger.ButLog("x5 = " + x5.ToString());
                x3 = (40 + Convert.ToInt32(l1/2));
                //logger.ButLog("x3 = " + x3.ToString());
                y3 = ((400 - (Convert.ToInt32(H))));
                //logger.ButLog("y3 = " + y3.ToString());

                Point[] apt = new Point[3];
                apt[0] = new Point(X0, 400);
                apt[1] = new Point(x3, y3);
                apt[2] = new Point(x5, 400);

                formGraphics.DrawCurve(myPen, apt, 0, 2, 0.5f);
                myPen.Dispose();
                formGraphics.Dispose();
            }
        }
    }
}