Draw Pyramid : Pyramid : Graphics C# Source Code

    

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow

Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

using System.Drawing.Drawing2D;

namespace Pyramid
{
    /// <summary>
    /// Summary description for Pyramid.
    /// </summary>
    public class Pyramid1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Button button1;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        int rot = 0;
        Point center = new Point(125, 100);
        public Pyramid1()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();
            
            this.Text = "Pyramid by Transfomation";
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(8, 8);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(48, 24);
            this.button1.TabIndex = 0;
            this.button1.Text = "Rotate";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Pyramid
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.button1});
            this.Name = "Pyramid";
            this.Text = "Pyramid";
            this.ResumeLayout(false);

        }
        #endregion

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new Pyramid1());
        }
        protected override void OnPaint (System.Windows.Forms.PaintEventArgs e)
        {
            Graphics g = e.Graphics;    
            g.Clear(this.BackColor); 
            
            Pyramid(g);
            //PyramidPathRotate(g);
            g.Dispose();
        }
        protected void Pyramid(Graphics g) 
        {  
            Pen p = new Pen(Color.Blue);
            int ten = 10;
            Rectangle rc = new Rectangle(50, 90, 150, ten);  // the base rectangle
            g.DrawRectangle(p, rc);
            for(int i = 1;i <= 7; i++) 
            {
                rc.Offset(0,-ten);
                rc.Inflate(-ten, 0);
                g.DrawRectangle(p, rc);
            }
            p.Dispose();
        }
        private void button1_Click(object sender, System.EventArgs e)
        {
//          rot++;  // rot is a class member
//          PyramidPathRotate(CreateGraphics());
//          Refresh();
        }
        protected void PyramidPathRotate(Graphics g) 
        {
            GraphicsPath gP = new GraphicsPath();  // create an empty path 
            Pen p = new Pen(Color.Blue);
            int ten = 10;
            Rectangle rc = new Rectangle(50, 90, 150, ten);  // the base rectangle
            gP.AddRectangle(rc);
            for(int i = 1;i <= 7; i++) 
            {
                rc.Offset(0,-ten);
                rc.Inflate(-ten,0);
                gP.AddRectangle(rc);
            }
            Matrix m = new Matrix();
            m.RotateAt(45*rot, center, MatrixOrder.Append);
            gP.Transform(m);
            g.DrawPath(p, gP);  // draw the rotated path
            g.FillEllipse(Brushes.Red, center.X, center.Y, 3, 3);  // center point

            p.Dispose();
        }
    }
}