ÈÓã Çááå ÇáÑÍãä ÇáÑÍíã
ÇáÏÑÓ ÇáËÇáË

ÃåáÇ Èßã Ýí ÇáÏÑÓ ÇáËÇáË ãä ÓáÓáÉ ÏÑæÓ ÊÚáã 3D Xna (ÇáÓáÓáÉ ÇáËÇäíÉ)¡ Ýí åÐÇ ÇáÏÑÓ ÓæÝ äÞæã ÈÅäÔÇÁ ÃÑÖíÉ ÇáãÏíäÉ.
ÇáÂä æÞÏ ÑÃíäÇ ßíÝ ÈÅãßÇääÇ ÅÓÊíÑÇÏ ÕæÑ ÈÓíØÉ Åáì ãÔÑæÚ Çá Xna ÇáÎÇÕ ÈäÇ¡ æ ßíÝ ÊÞæã ÇáXna ÈÚÑÖ åÐå ÇáÕæÑ Úáì ÇáãËáËÇÊ¡ áä íßæä ãä ÇáÕÚÈ ÚáíäÇ ÅäÔÇÁ ßãíÉ ßÈíÑÉ ãä ÇáÕæÑ. ãä Çáãåã ÌÏÇ ÅíÌÇÏ ØÑíÞÉ áÌÚá ÇáßãÈíæÊÑ íÞæã ÈÊÚÑíÝ ßá ÇáäÞÇØ áäÇ ÈÔßá ÊáÞÇÆí.
ßãËÇá ÈÓíØ¡ ÏÚäÇ äÞæã ÈÅäÔÇÁ ÔÈßÉ ãßæäÉ ãä 3*3 ÕæÑ¡ ÈÏæä ÇáÕæÑÉ Ýí ÇáæÓØ. åÐÇ íÚäí 8 ÕæÑ¡ ÅÐÇ 16 ãËáË¡ æ 48 ÑÃÓ. ÈÏáÇ ãä ÊÚÑíÝ ÌãíÚ åÐå ÇáÑÄæÓ íÏæíÇ¡ ÏÚäÇ äÞæã ÈÅäÔÇÁ ãÕÝæÝÉ ÈÅÓã “floorPlan”¡ Ýí ÃÚáì ÇáßæÏ. åÐå ÇáãÕÝæÝÉ ÓæÝ ÊÍÊæí áÇÍÞÇ ÇáÃãÇßä ÇáÊí äÑíÏ Ãä íßæä ÝíåÇ ãÈÇäí Ýí ÇáãÏíäÉ ËáÇËíÉ ÇáÃÈÚÇÏ:

 int[,] floorPlan;
 
 VertexBuffer cityVertexBuffer;
 VertexDeclaration texturedVertexDeclaration;

 private void LoadFloorPlan()
 {
     floorPlan = new int[,]
     {
         {0,0,0},
         {0,1,0},
         {0,0,0},
     };
 }

 LoadFloorPlan();

sceneryTexture = Content.Load<Texture2D> ("texturemap");

 private void SetUpVertices()
 {
     int cityWidth = floorPlan.GetLength(0);
     int cityLength = floorPlan.GetLength(1);
 

    List<VertexPositionNormalTexture> verticesList = new List<VertexPositionNormalTexture> ();
    for (int x = 0; x < cityWidth; x++)
    {
        for (int z = 0; z < cityLength; z++)
        {
          //if floorPlan contains a 0 for this tile, add 2 triangles        
        }
    }

    cityVertexBuffer = new VertexBuffer(device, verticesList.Count * VertexPositionNormalTexture.SizeInBytes, BufferUsage.WriteOnly);

    cityVertexBuffer.SetData<VertexPositionNormalTexture> (verticesList.ToArray());
    texturedVertexDeclaration = new VertexDeclaration(device, VertexPositionNormalTexture.VertexElements);
}

 int imagesInTexture = 11;
 if (floorPlan[x,z] == 0)
 {
     verticesList.Add(new VertexPositionNormalTexture(new Vector3(x, 0, -z), new Vector3(0, 1, 0), new Vector2(0, 1)));
     verticesList.Add(new VertexPositionNormalTexture(new Vector3(x, 0, -z-1),new Vector3(0, 1, 0), new Vector2(0, 0)));
     verticesList.Add(new VertexPositionNormalTexture(new Vector3(x + 1,0,-z), new Vector3(0, 1, 0), new Vector2(1.0f / imagesInTexture, 1)));
 
     verticesList.Add(new VertexPositionNormalTexture(new Vector3(x, 0,-z-1), new Vector3(0, 1, 0), new Vector2(0, 0)));
     verticesList.Add(new VertexPositionNormalTexture(new Vector3(x + 1,0,-z-1), new Vector3(0, 1, 0), new Vector2(1.0f / imagesInTexture, 0)));
     verticesList.Add(new VertexPositionNormalTexture(new Vector3(x + 1,0,-z), new Vector3(0, 1, 0), new Vector2(1.0f / imagesInTexture, 1)));
 }

 private void DrawCity()
 {
     effect.CurrentTechnique = effect.Techniques["Textured"];
     effect.Parameters["xWorld"].SetValue(Matrix.Identity);
     effect.Parameters["xView"].SetValue(viewMatrix);
     effect.Parameters["xProjection"].SetValue(projectionMatrix);
     effect.Parameters["xTexture"].SetValue(sceneryTexture);
     effect.Begin();
     foreach (EffectPass pass in effect.CurrentTechnique.Passes)
     {
         pass.Begin();
         device.VertexDeclaration = texturedVertexDeclaration;
         device.Vertices[0].SetSource(cityVertexBuffer, 0, VertexPositionNormalTexture.SizeInBytes);
         device.DrawPrimitives(PrimitiveType.TriangleList, 0, cityVertexBuffer.SizeInBytes / VertexPositionNormalTexture.SizeInBytes / 3);
         pass.End();
     }
     effect.End();
 }

 protected override void Draw(GameTime gameTime)
 {
     ClearOptions.DepthBuffer, Color.DarkSlateBlue, 1.0f, 0);
 
     DrawCity();
 
     base.Draw(gameTime);
 }

 viewMatrix = Matrix.CreateLookAt(new Vector3(3, 5, 2), new Vector3(2, 0, -1), new Vector3(0, 1, 0));

ÇáÂä íÌÈ Ãä ÊÍÕá Úáì ÇáÔßá Ýí ÇáÕæÑÉ ÇáÊÇáíÉ:



ÍÇæá Íá ÇáÊãÇÑíä ÇáÊÇáíÉ¡ áããÇÑÓÉ ãÇ ÞÏ ÊÚáãäÇå:

• Þã ÈÊÛííÑ ãÍÊæíÇÊ ÇáãÕÝæÝÉ floorPlan.
• Þã ÈÊÛíÑ ÍÌã ÇáãÕÝæÝÉ floorPlan.
• Þã ÈÊÛííÑ ÅÍÏÇËíÇÊ ÇáÎÇãÉ ááÑÄæÓ¡ ÈÍíË ÊÞæã ÈØÇÞÉ ÇáÑÓæãíÇÊ ÈÅÓÊÎÏÇã ÕæÑÉ ÃÎÑì ãä ÇáÎÇãÇÊ ÇáãæÌæÏÉ áÊÛØíÉ ÇáÃÑÖíÉ.


Ýí åÐÇ ÇáÏÑÓ ÊÚáãäÇ ßíÝ äÓÊÎÏã ÇáÎÇãÇÊ “texturemap” æ ßíÝ äÓÊÎÏã ÇáÞæÇÆã “List”¡ æåí ãíÒÇÊ ãÝíÏÉ Ýí Çá C# æ Çá Xna.

ßæÏ ÇáãÔÑæÚ ÍÊì ÇááÍÙÉ:

 using System;
 using System.Collections.Generic;
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Audio;
 using Microsoft.Xna.Framework.Content;
 using Microsoft.Xna.Framework.GamerServices;
 using Microsoft.Xna.Framework.Graphics;
 using Microsoft.Xna.Framework.Input;
 using Microsoft.Xna.Framework.Net;
 using Microsoft.Xna.Framework.Storage;
 
 namespace XNAseries2
 {
     public class Game1 : Microsoft.Xna.Framework.Game
     {
         GraphicsDeviceManager graphics;
         GraphicsDevice device;
 
         Effect effect;
         Matrix viewMatrix;
         Matrix projectionMatrix;
 
         Texture2D sceneryTexture;
         int[,] floorPlan;
 
         VertexBuffer cityVertexBuffer;
         VertexDeclaration texturedVertexDeclaration;
 
         public Game1()
         {
             graphics = new GraphicsDeviceManager(this);
             Content.RootDirectory = "Content";
         }
 
         protected override void Initialize()
         {
             graphics.PreferredBackBufferWidth = 500;
             graphics.PreferredBackBufferHeight = 500;
             graphics.IsFullScreen = false;
             graphics.ApplyChanges();
             Window.Title = "Riemer's XNA Tutorials -- Series 2";
 
             LoadFloorPlan();
 
             base.Initialize();
         }
 
         protected override void LoadContent()
         {
             device = graphics.GraphicsDevice;
 

            effect = Content.Load<Effect> ("effects");

            sceneryTexture = Content.Load<Texture2D> ("texturemap");
            SetUpVertices();

             SetUpCamera();
         }
 
         private void LoadFloorPlan()
         {
             floorPlan = new int[,]
             {
                 {0,0,0},
                 {0,1,0},
                 {0,0,0},
             };
         }
 
         private void SetUpCamera()
         {
             viewMatrix = Matrix.CreateLookAt(new Vector3(3, 5, 2), new Vector3(2, 0, -1), new Vector3(0, 1, 0));
             projectionMatrix = Matrix.CreatePerspectiveFieldOfView(MathHelper.PiOver4, device.Viewport.AspectRatio, 0.2f, 500.0f);
         }
 
         private void SetUpVertices()
         {
             int cityWidth = floorPlan.GetLength(0);
             int cityLength = floorPlan.GetLength(1);
 

            List<VertexPositionNormalTexture> verticesList = new List<VertexPositionNormalTexture> ();
            for (int x = 0; x < cityWidth; x++)
            {
                for (int z = 0; z < cityLength; z++)
                {
                    int imagesInTexture = 11;
                    if (floorPlan[x,z] == 0)
                    {
                        verticesList.Add(new VertexPositionNormalTexture(new Vector3(x, 0, -z), new Vector3(0, 1, 0), new Vector2(0, 1)));
                        verticesList.Add(new VertexPositionNormalTexture(new Vector3(x, 0, -z-1),new Vector3(0, 1, 0), new Vector2(0, 0)));
                        verticesList.Add(new VertexPositionNormalTexture(new Vector3(x + 1, 0, -z), new Vector3(0, 1, 0), new Vector2(1.0f / imagesInTexture, 1)));

                        verticesList.Add(new VertexPositionNormalTexture(new Vector3(x, 0,-z-1), new Vector3(0, 1, 0), new Vector2(0, 0)));
                        verticesList.Add(new VertexPositionNormalTexture(new Vector3(x + 1, 0, -z-1), new Vector3(0, 1, 0), new Vector2(1.0f / imagesInTexture, 0)));
                        verticesList.Add(new VertexPositionNormalTexture(new Vector3(x + 1, 0, -z), new Vector3(0, 1, 0), new Vector2(1.0f / imagesInTexture, 1)));
                    }
                }
            }

            cityVertexBuffer = new VertexBuffer(device, verticesList.Count * VertexPositionNormalTexture.SizeInBytes, BufferUsage.WriteOnly);

            cityVertexBuffer.SetData<VertexPositionNormalTexture> (verticesList.ToArray());
            texturedVertexDeclaration = new VertexDeclaration(device, VertexPositionNormalTexture.VertexElements);
        }

 
         protected override void UnloadContent()
         {
         }
 
         protected override void Update(GameTime gameTime)
         {
             base.Update(gameTime);
         }
 
         protected override void Draw(GameTime gameTime)
         {
             device.Clear(ClearOptions.Target | ClearOptions.DepthBuffer, Color.DarkSlateBlue, 1.0f, 0);
 
             DrawCity();
 
             base.Draw(gameTime);
         }
 
         private void DrawCity()
         {
             effect.CurrentTechnique = effect.Techniques["Textured"];
             effect.Parameters["xWorld"].SetValue(Matrix.Identity);
             effect.Parameters["xView"].SetValue(viewMatrix);
             effect.Parameters["xProjection"].SetValue(projectionMatrix);
             effect.Parameters["xTexture"].SetValue(sceneryTexture);
             effect.Begin();
             foreach (EffectPass pass in effect.CurrentTechnique.Passes)
             {
                 pass.Begin();
                 device.VertexDeclaration = texturedVertexDeclaration;
                 device.Vertices[0].SetSource(cityVertexBuffer, 0, VertexPositionNormalTexture.SizeInBytes);
                 device.DrawPrimitives(PrimitiveType.TriangleList, 0, cityVertexBuffer.SizeInBytes / VertexPositionNormalTexture.SizeInBytes / 3);
                 pass.End();
             }
             effect.End();
         }
     }
 }