using System;
using System.Drawing;
using OpenTK;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;
using OpenTK.Input;

namespace OpenGL_110825
{
    class Program
    {
        public float rtri;			// rtri is for rotating the pyramid
        public static double rquad = 30;			// rquad is for rotating the quad


        [STAThread]
        public static void Main()
        {
            using (var game = new GameWindow())
            {
                game.Load += (sender, e) =>
                {
                    // setup settings, load textures, sounds
                    game.VSync = VSyncMode.On;

                    GL.ShadeModel(ShadingModel.Smooth);
                    GL.ClearColor(0, 0, 0, 0.5f);
                    GL.ClearDepth(1);
                    GL.Enable(EnableCap.DepthTest);
                    GL.DepthFunc(DepthFunction.Lequal);
                    GL.Hint(HintTarget.PerspectiveCorrectionHint, HintMode.Nicest);
                };

                game.Resize += (sender, e) =>
                {
                    //GL.MatrixMode(MatrixMode.Projection);
                    GL.LoadIdentity();
                    //Matrix4 m_prespective = Matrix4.Perspective((float) System.Math.PI / 4, game.Width / game.Height, 1, 100);
                    Matrix4d m_prespective = Matrix4d.CreatePerspectiveFieldOfView(System.Math.Pi / 4, (float)game.Width / (float)game.Height, 1.0, 100);
                    GL.MatrixMode(MatrixMode.Modelview);                    
                    GL.LoadMatrix(ref m_prespective);

                    GL.Viewport(0, 0, game.Width, game.Height);
                };

                game.UpdateFrame += (sender, e) =>
                {
                    // add game logic, input handling
                    if (game.Keyboard[Key.Escape])
                    {
                        game.Exit();
                    }
                };

                game.RenderFrame += (sender, e) =>
                {
                    //GL.Ortho(-1.0, 1.0, -1.0, 1.0, 0.0, 4.0);
                    // render graphics
                    GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
                    GL.MatrixMode(MatrixMode.Modelview);
                    GL.LoadIdentity();
                    GL.Translate(0.3, 1, -3);
                    GL.Rotate(rquad, 1, 1, 1);
                    rquad -= 0.05;


                    GL.Begin(PrimitiveType.Polygon);
                    GL.Color3(Color.Gray);
                    GL.Vertex3(0.0f, 0.0f, 0.0f);			// Top of Triangle (Front)
                    GL.Vertex3(0.0f, 0.46f, 0.0f);
                    GL.Vertex3(0.77f, 0.46f, 0.0f);
                    GL.Vertex3(0.77f, 0.34f, 0.0f);
                    GL.Vertex3(0.92f, 0.34f, 0.0f);
                    GL.Vertex3(0.92f, 0.12f, 0.0f);
                    GL.Vertex3(0.77f, 0.12f, 0.0f);
                    GL.Vertex3(0.77f, 0.0f, 0.0f);

                    GL.Color3(Color.Gray);			
                    GL.Vertex3(0.0f, 0.0f, 0.0f);
                    GL.Vertex3(0.0f, 0.0f, 0.45f);
                    GL.Vertex3(0.45f, 0.0f, 0.45f);
                    GL.Vertex3(0.77f, 0.0f, 0.11f);
                    GL.Vertex3(0.77f, 0.0f, 0.0f);

                    GL.Color3(Color.Gray);	
                    GL.Vertex3(0.0f, 0.46f, 0.0f);
                    GL.Vertex3(0.0f, 0.46f, 0.45f);
                    GL.Vertex3(0.45f, 0.46f, 0.45f);
                    GL.Vertex3(0.77f, 0.46f, 0.11f);
                    GL.Vertex3(0.77f, 0.46f, 0.0f);

                    GL.Color3(Color.Gray);	
                    GL.Vertex3(0.92f, 0.12f, 0.0f);
                    GL.Vertex3(0.77f, 0.12f, 0.0f);
                    GL.Vertex3(0.77f, 0.12f, 0.11f);
                    GL.Vertex3(0.62f, 0.12f, 0.23f);
                    GL.Vertex3(0.92f, 0.12f, 0.23f);
                    
                    GL.Color3(Color.Gray);		
                    GL.Vertex3(0.92f, 0.34f, 0.0f);
                    GL.Vertex3(0.77f, 0.34f, 0.0f);
                    GL.Vertex3(0.77f, 0.34f, 0.11f);
                    GL.Vertex3(0.62f, 0.34f, 0.23f);
                    GL.Vertex3(0.92f, 0.34f, 0.23f);

                    GL.Color3(Color.Gray);		
                    GL.Vertex3(0.77f, 0.0f, 0.11f);
                    GL.Vertex3(0.45f, 0.0f, 0.45f);
                    GL.Vertex3(0.45f, 0.17f, 0.45f);
                    GL.Vertex3(0.595f, 0.17f, 0.32f);
                    GL.Vertex3(0.595f, 0.29f, 0.32f);
                    GL.Vertex3(0.45f, 0.29f, 0.45f);
                    GL.Vertex3(0.45f, 0.46f, 0.45f);
                    GL.Vertex3(0.77f, 0.46f, 0.11f);
                    GL.Vertex3(0.77f, 0.34f, 0.1f);
                    GL.Vertex3(0.62f, 0.34f, 0.23f);
                    GL.Vertex3(0.62f, 0.12f, 0.23f);
                    GL.Vertex3(0.77f, 0.12f, 0.11f);

                    GL.End();

                    game.SwapBuffers();
                };

                // Run the game at 60 updates per second
                game.Run(60.0);
            }
        }
    }
}