/*
 * Created by SharpDevelop.
 * User: username
 * Date: 03/07/2012
 * Time: 21:31
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
 */
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using OpenTK;
using OpenTK.Graphics.OpenGL;

namespace Graphic_Demo_0
{
	/// <summary>
	/// Description of MainForm.
	/// </summary>
	public partial class MainForm : Form
	{
		bool GL_Loaded = false;
		double fov, fovTan, aspect;
		
		public MainForm()
		{
			//
			// The InitializeComponent() call is required for Windows Forms designer support.
			//
			InitializeComponent();
			
			//
			// TODO: Add constructor code after the InitializeComponent() call.
			//
		}
		
		void GlControl1Load(object sender, EventArgs e)
		{
			GL_Loaded = true;
			SetupViewport();
			GL.ClearColor(Color.FromArgb(0,0,0));
		}
		
		private void SetupViewport()
		{
			int w = glControl1.Width;
			int h = glControl1.Height;
			aspect = w / h;
			fov = Math.PI * 0.25;
			fovTan = Math.Tan(fov * 0.5);
			Matrix4 perspective = Matrix4.CreatePerspectiveFieldOfView(Convert.ToSingle(fov), Convert.ToSingle(aspect), 10.0f, 5000.0f);
			GL.MatrixMode(MatrixMode.Projection);
			GL.LoadIdentity();
			GL.LoadMatrix(ref perspective);
			GL.Viewport(0, 0, w, h);
		}
	}
}