using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using Microsoft;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
using Microsoft.DirectX.DirectInput;

namespace DrawMesh
{
	public class Form1 : System.Windows.Forms.Form
	{
        private Microsoft.DirectX.Direct3D.Device device = null;
        private Mesh mesh = null;
        private Material[] meshMaterials;
        private Texture[] meshTextures;
        private Microsoft.DirectX.DirectInput.Device mouse;

		private System.ComponentModel.Container components = null;
        private float angle = 0.0f;
        private float fov = 1.0f;
        private bool movingIn;

        Vector3 cameraPosition = new Vector3(0.0f, 2.0f, 3.0f);
        Vector3 origin = new Vector3(0.0f, 0.0f, 0.0f);

		public Form1()
		{
			InitializeComponent();

            this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.Opaque, true);
		}

        public void InitializeGraphics()
        {
            // Set our presentation parameters
            PresentParameters presentParams = new PresentParameters();

            presentParams.Windowed = true;
            presentParams.SwapEffect = SwapEffect.Discard;
            presentParams.AutoDepthStencilFormat = DepthFormat.D16;
            presentParams.EnableAutoDepthStencil = true;

            // Create our device
            device = new Microsoft.DirectX.Direct3D.Device(0, Microsoft.DirectX.Direct3D.DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, presentParams);

            // Load our mesh
            LoadMesh(@"dino.x");
        }

        private void LoadMesh(string file)
        {
            ExtendedMaterial[] mtrl;

            // Load our mesh
            mesh = Mesh.FromFile(file, MeshFlags.Managed, device, out mtrl);

            // If we have any materials, store them
            if ((mtrl != null) && (mtrl.Length > 0))
            {
                meshMaterials = new Material[mtrl.Length];
                meshTextures = new Texture[mtrl.Length];

                // Store each material and texture
                for (int i = 0; i < mtrl.Length; i++)
                {
                    meshMaterials[i] = mtrl[i].Material3D;
                    if ((mtrl[i].TextureFilename != null) && (mtrl[i].TextureFilename != string.Empty))
                    {
                        // We have a texture, try to load it
                        meshTextures[i] = TextureLoader.FromFile(device, mtrl[i].TextureFilename);
                    }
                }
            }
        }

        private void SetupMouse()
        {
            mouse = new Microsoft.DirectX.DirectInput.Device(SystemGuid.Mouse);
            mouse.SetCooperativeLevel(this, CooperativeLevelFlags.Background | CooperativeLevelFlags.NonExclusive);
            mouse.Acquire();
        }

        private void SetupCamera()
        {




            // (float)Math.PI / 4, this.Width / this.Height
            device.Transform.Projection = Matrix.PerspectiveFovLH( fov, this.Width / this.Height, 1.0f, 1000.0f);
            device.Transform.View = Matrix.LookAtLH(cameraPosition, origin, new Vector3(0,1,0));

            //device.RenderState.Ambient = Color.FromArgb(90, 90, 90);
            device.RenderState.Lighting = true;

            device.Lights[0].Type = LightType.Point;
            device.Lights[0].Diffuse = Color.White;
            device.Lights[0].Range = 10;
            device.Lights[0].Position = new Vector3(0.0f, -1.0f, 1.0f);
            device.Lights[0].Direction = new Vector3(0, 0, 0);
            device.Lights[0].Update();
            device.Lights[0].Enabled = true;

            device.Lights[1].Type = LightType.Point;
            device.Lights[1].Diffuse = Color.AliceBlue;
            device.Lights[1].Range = 12;
            device.Lights[1].Position = new Vector3(-1.0f, 0.0f, 1.0f);
            device.Lights[1].Direction = new Vector3(0, 0, 0);
            device.Lights[1].Update();
            device.Lights[1].Enabled = true;

        }

        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.DarkSeaGreen, 1.0f, 0);

            SetupCamera();
            SetupMouse();


            device.BeginScene();

            // Draw our Mesh
            DrawMesh(angle / (float)Math.PI, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);

            device.EndScene();
            device.Present();

            this.Invalidate();
        }

        private void DrawMesh(float yaw, float pitch, float roll, float x, float y, float z)
        {

            MouseState clicks = new MouseState();
            clicks = mouse.CurrentMouseState;
            byte[] buttons = clicks.GetMouseButtons();
   
           if (0 != buttons[0])
             fov = fov - 0.005f;
            if (0 != buttons[1])
                fov = fov + 0.005f;
           angle += 0.03f;

            device.Transform.World = Matrix.RotationYawPitchRoll(yaw, pitch, roll) * Matrix.Translation(x, y, z);
            for (int i = 0; i < meshMaterials.Length; i++)
            {
                device.Material = meshMaterials[i];
                device.SetTexture(0, meshTextures[i]);
                mesh.DrawSubset(i);
            }
        }

		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.SuspendLayout();
            // 
            // Form1
            // 
            this.ClientSize = new System.Drawing.Size(792, 566);
            this.Name = "Form1";
            this.Text = "Sean Carrica Mesh Assignment";
            this.Load += new System.EventHandler(this.Form1_Load);
            this.ResumeLayout(false);

		}
		#endregion

        static void Main() 
        {
            using (Form1 frm = new Form1())
            {
                // Show our form and initialize our graphics engine
                frm.Show();
                frm.InitializeGraphics();
                Application.Run(frm);
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
	}
}