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C# Quellcode

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
 
namespace WindowsFormsApplication3
{
    public class Form1 : Form
    {
        /// <summary>
        /// Erforderliche Designervariable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;
 
        /// <summary>
        /// Verwendete Ressourcen bereinigen.
        /// </summary>
        /// <param name="disposing">True, wenn verwaltete Ressourcen gelöscht werden sollen; andernfalls False.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }
 
        #region Vom Windows Form-Designer generierter Code
 
        /// <summary>
        /// Erforderliche Methode für die Designerunterstützung.
        /// Der Inhalt der Methode darf nicht mit dem Code-Editor geändert werden.
        /// </summary>
        private void InitializeComponent()
        {
            this.pictureBox1 = new System.Windows.Forms.PictureBox();
            this.button1 = new System.Windows.Forms.Button();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
            this.SuspendLayout();
            // 
            // pictureBox1
            // 
            this.pictureBox1.Location = new System.Drawing.Point(12, 12);
            this.pictureBox1.Name = "pictureBox1";
            this.pictureBox1.Size = new System.Drawing.Size(260, 240);
            this.pictureBox1.TabIndex = 0;
            this.pictureBox1.TabStop = false;
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(197, 258);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 1;
            this.button1.Text = "button1";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(284, 288);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.pictureBox1);
            this.Name = "Form1";
            this.Text = "Form1";
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
            this.ResumeLayout(false);
 
        }
 
        #endregion
 
        private System.Windows.Forms.PictureBox pictureBox1;
        private System.Windows.Forms.Button button1;
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private Bitmap bmp;
        private Graphics PrintHandler;
 
        private void button1_Click(object sender, EventArgs e)
        {
 
            Pen p = new Pen(Color.Red, 1);
            Pen p2 = new Pen(Color.Blue, 2);
 
            this.bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height);
            pictureBox1.Image = bmp;
            PrintHandler = Graphics.FromImage(pictureBox1.Image);
 
 
            double durchmesser = 11d;
 
            double Vx = 21.213;
            double Vy = -18.134;
            double yVorzeichenVerschiebung = Vy;
 
            double xStart = (durchmesser - 1d) / 2d;
            double yStart = 0d - yVorzeichenVerschiebung + (durchmesser - 1d) / 2d;
 
            double xStop = Vx;
            double yStop = durchmesser / 2d;
 
            Point startPoint = new Point((int)xStart, (int)yStart);
            Point endPoint = new Point((int)xStop, (int)yStop);
 
            PrintHandler.DrawLine(p2, startPoint, endPoint);
 
            if (yVorzeichenVerschiebung == 0)
            {
                /*e.Graphics.DrawLine(p2, endPoint, new Point(endPoint.X - 10, endPoint.Y));
                e.Graphics.DrawLine(p2, endPoint, new Point(endPoint.X, endPoint.Y - 10));*/
 
                /*e.Graphics.DrawLine(p2, endPoint, new Point(endPoint.X - 10, endPoint.Y));
                e.Graphics.DrawLine(p2, endPoint, new Point(endPoint.X, endPoint.Y - 10));*/
                //Console.Out.WriteLine(1);
            }
            else
            {
                // Ansatz über winkel klappt irgendwie nicht...
                /*double test;
                test = Math.Tan(Math.PI * 45 / 180) * Math.Sqrt(Math.Pow(endPoint.X, 2d) * Math.Pow(endPoint.Y, 2d));
                */
 
                PrintHandler.DrawLine(p2, endPoint, new Point(endPoint.X - 10, endPoint.Y - 10));
                PrintHandler.DrawLine(p2, endPoint, new Point(endPoint.X - 5, endPoint.Y + 10));
            }
        }
 
        /// <summary>
        /// Der Haupteinstiegspunkt für die Anwendung.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
 
 
}