using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Drawing.Imaging;

using System.Text;

using System.Windows.Forms;



using SharpGL;

using SharpGL.SceneGraph.Assets;



namespace SharpGLTexturesSample

{

    public partial class FormSharpGLTexturesSample : Form

    {

        public FormSharpGLTexturesSample()

        {

            InitializeComponent();



            //  Get the OpenGL object, for quick access.

            SharpGL.OpenGL gl = this.openGLControl1.OpenGL;



            //  A bit of extra initialisation here, we have to enable textures.

            gl.Enable(OpenGL.GL_TEXTURE_2D);



            //  Create our texture object from a file. This creates the texture for OpenGL.

            texture.Create(gl, "Crate.bmp");

        }



        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

        {

            System.Diagnostics.Process.Start("http://nehe.gamedev.net");

        }



        private void openGLControl1_OpenGLDraw(object sender, PaintEventArgs e)

        {

            //  Get the OpenGL object, for quick access.

            SharpGL.OpenGL gl = this.openGLControl1.OpenGL;



            gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);

            gl.LoadIdentity();

            gl.Translate(0.0f, 0.0f, -6.0f);



            gl.Rotate(rtri, 0.0f, 1.0f, 0.0f);



            //  Bind the texture.

            texture.Bind(gl);



            gl.Begin(OpenGL.GL_QUADS);



                // Front Face

                gl.TexCoord(0.0f, 0.0f); gl.Vertex(-1.0f, -1.0f, 1.0f);	// Bottom Left Of The Texture and Quad

                gl.TexCoord(1.0f, 0.0f); gl.Vertex(1.0f, -1.0f, 1.0f);	// Bottom Right Of The Texture and Quad

                gl.TexCoord(1.0f, 1.0f); gl.Vertex(1.0f, 1.0f, 1.0f);	// Top Right Of The Texture and Quad

                gl.TexCoord(0.0f, 1.0f); gl.Vertex(-1.0f, 1.0f, 1.0f);	// Top Left Of The Texture and Quad



                // Back Face

                gl.TexCoord(1.0f, 0.0f); gl.Vertex(-1.0f, -1.0f, -1.0f);	// Bottom Right Of The Texture and Quad

                gl.TexCoord(1.0f, 1.0f); gl.Vertex(-1.0f, 1.0f, -1.0f);	// Top Right Of The Texture and Quad

                gl.TexCoord(0.0f, 1.0f); gl.Vertex(1.0f, 1.0f, -1.0f);	// Top Left Of The Texture and Quad

                gl.TexCoord(0.0f, 0.0f); gl.Vertex(1.0f, -1.0f, -1.0f);	// Bottom Left Of The Texture and Quad



                // Top Face

                gl.TexCoord(0.0f, 1.0f); gl.Vertex(-1.0f, 1.0f, -1.0f);	// Top Left Of The Texture and Quad

                gl.TexCoord(0.0f, 0.0f); gl.Vertex(-1.0f, 1.0f, 1.0f);	// Bottom Left Of The Texture and Quad

                gl.TexCoord(1.0f, 0.0f); gl.Vertex(1.0f, 1.0f, 1.0f);	// Bottom Right Of The Texture and Quad

                gl.TexCoord(1.0f, 1.0f); gl.Vertex(1.0f, 1.0f, -1.0f);	// Top Right Of The Texture and Quad



                // Bottom Face

                gl.TexCoord(1.0f, 1.0f); gl.Vertex(-1.0f, -1.0f, -1.0f);	// Top Right Of The Texture and Quad

                gl.TexCoord(0.0f, 1.0f); gl.Vertex(1.0f, -1.0f, -1.0f);	// Top Left Of The Texture and Quad

                gl.TexCoord(0.0f, 0.0f); gl.Vertex(1.0f, -1.0f, 1.0f);	// Bottom Left Of The Texture and Quad

                gl.TexCoord(1.0f, 0.0f); gl.Vertex(-1.0f, -1.0f, 1.0f);	// Bottom Right Of The Texture and Quad



                // Right face

                gl.TexCoord(1.0f, 0.0f); gl.Vertex(1.0f, -1.0f, -1.0f);	// Bottom Right Of The Texture and Quad

                gl.TexCoord(1.0f, 1.0f); gl.Vertex(1.0f, 1.0f, -1.0f);	// Top Right Of The Texture and Quad

                gl.TexCoord(0.0f, 1.0f); gl.Vertex(1.0f, 1.0f, 1.0f);	// Top Left Of The Texture and Quad

                gl.TexCoord(0.0f, 0.0f); gl.Vertex(1.0f, -1.0f, 1.0f);	// Bottom Left Of The Texture and Quad



                // Left Face

                gl.TexCoord(0.0f, 0.0f); gl.Vertex(-1.0f, -1.0f, -1.0f);	// Bottom Left Of The Texture and Quad

                gl.TexCoord(1.0f, 0.0f); gl.Vertex(-1.0f, -1.0f, 1.0f);	// Bottom Right Of The Texture and Quad

                gl.TexCoord(1.0f, 1.0f); gl.Vertex(-1.0f, 1.0f, 1.0f);	// Top Right Of The Texture and Quad

                gl.TexCoord(0.0f, 1.0f); gl.Vertex(-1.0f, 1.0f, -1.0f);	// Top Left Of The Texture and Quad

            gl.End();



            gl.Flush();



            rtri += 1.0f;// 0.2f;						// Increase The Rotation Variable For The Triangle 

        }





        float rtri = 0;



        //  The texture identifier.

        Texture texture = new Texture();



        private void buttonLoad_Click(object sender, EventArgs e)

        {

            //  Show a file open dialog.

            if (openFileDialog1.ShowDialog() == DialogResult.OK)

            {

                //  Destroy the existing texture.

                texture.Destroy(openGLControl1.OpenGL);



                //  Create a new texture.

                texture.Create(openGLControl1.OpenGL, openFileDialog1.FileName);



                //  Redraw.

                openGLControl1.Invalidate();

            }

        }

    }

}