using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace win_kytka
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		private Stack zasobnik = new Stack();

		private Bitmap bm;

		

		private struct Zelva {
			public float x,y;
			public float direction;
			public float krok;
			public float uchylka;

			public Zelva(float x, float y, float direction, float uchylka, float krok){
				this.x = x;
				this.y = y;
				this.direction = direction;
				this.uchylka = uchylka;
				this.krok = krok;
			}
		} ;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// 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()
		{
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(664, 654);
			this.Name = "Form1";
			this.Text = "Form1";
			this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{

			Application.Run(new Form1());
		}

		private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
		{
			Zelva ahoj = new Zelva(this.ClientSize.Width/2,this.ClientSize.Height,(float)(Math.PI/2),2/9.0f,2);
			Zelva nazdar = new Zelva(this.ClientSize.Width/2f,this.ClientSize.Height,(float)(Math.PI/2f),2/8.0f,0.1f);
			//kreslic(e.Graphics, ref ahoj,7,"X");
			kreslic(e.Graphics, ref nazdar,12,"X");
			/*bm  = new Bitmap(1000,1000);

			kreslic(Graphics.FromImage(bm), ref nazdar, 12, "X");
			bm.Save("ahoj.bmp");*/
		}

		private void kreslic(Graphics g, ref Zelva zelva, int zanoreni, string retezec){
			float foo;
			float bar;
			if(zanoreni == 0) return;

			for(int i = 0; i < retezec.Length; i++)
			{
				switch(retezec[i])
				{
					case 'F':
						foo = (float)(zelva.x + zelva.krok * Math.Cos(zelva.direction));
						bar = (float)(zelva.y - zelva.krok * Math.Sin(zelva.direction));
						g.DrawLine(Pens.Black,zelva.x,zelva.y,foo, bar);
						zelva.x = foo;
						zelva.y = bar;
						kreslic(g,ref zelva,zanoreni-1,"FF");
						break;
					case 'X':
						kreslic(g,ref zelva,zanoreni-1,"F[[+X]+XF]FX[[-X]-XF]+X");

						break;
					case '[':
                        zasobnik.Push(zelva);
						break;
					case ']':
						zelva = (Zelva)zasobnik.Pop();
						break;
					case '+':
						zelva.direction += zelva.uchylka;
						break;
					case '-':
						zelva.direction -= zelva.uchylka;
						break;
				}
			}

		
		}
	}
}