Dogcows Code - chaz/carfire/blob - CarFire/CarFire/CarFire/Tilemap.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Linq;
   4 using System.Text;
   5 using System.Diagnostics;
   6 using Microsoft.Xna.Framework;
   7 using Microsoft.Xna.Framework.Content;
   8 using Microsoft.Xna.Framework.Graphics;
   9 namespace CarFire
  10 {
  11     /// <summary>
  12     /// Small wrapper around a texture to provide easy access to
  13     /// tile rectangles.
  14     /// </summary>
  15     public class Tilemap
  16     {
  17         #region Public Properties
  18
  19         /// <summary>
  20         /// Get the texture for this tilemap.
  21         /// </summary>
  22         public Texture2D Texture { get { return mTexture; } }
  23
  24         #endregion
  25
  26
  27         #region Public Methods
  28
  29         /// <summary>
  30         /// Construct a tilemap with a texture and dimensions in
  31         /// tiles.
  32         /// </summary>
  33         /// <param name="texture">The texture.</param>
  34         /// <param name="width">Number of tiles across.</param>
  35         /// <param name="height">Number of tiles down.</param>
  36         public Tilemap(Texture2D texture, int width, int height)
  37         {
  38             mTexture = texture;
  39             mWidth = width;
  40             mHeight = height;
  41             mTileW = mTexture.Width / mWidth;
  42             mTileH = mTexture.Height / mHeight;
  43         }
  44
  45
  46         /// <summary>
  47         /// Get a tile rectangle from a tile coordinate.
  48         /// </summary>
  49         /// <param name="point">Tile coordinates; [0,0] being the
  50         /// top-left tile.</param>
  51         /// <returns>Rectangle surrounding the tile.</returns>
  52         public Rectangle GetRectangleForTile(Point point)
  53         {
  54             return GetRectangleForTile(point.X, point.Y);
  55         }
  56
  57         /// <summary>
  58         /// Get a tile rectangle from a tile coordinate
  59         /// </summary>
  60         /// <param name="x">X-coordinate.</param>
  61         /// <param name="y">Y-coordinate.</param>
  62         /// <returns>Rectangle surrounding the tile.</returns>
  63         public Rectangle GetRectangleForTile(int x, int y)
  64         {
  65             Debug.Assert(0 <= x && x < mWidth && 0 <= y && y < mHeight);
  66             return new Rectangle(x * mTileW, y * mTileH, mTileW, mTileH);
  67         }
  68
  69         /// <summary>
  70         /// Get a tile rectangle from a tile character.
  71         /// </summary>
  72         /// <param name="tile">Tile character.</param>
  73         /// <returns>Rectangle surrounding the tile.</returns>
  74         public Rectangle GetRectangleForTile(char tile)
  75         {
  76             return mTiles[tile];
  77         }
  78
  79
  80         /// <summary>
  81         /// Associate a tile character with tile coordinates.  This
  82         /// lets you access tile rectangles by character.
  83         /// </summary>
  84         /// <param name="tile">Tile character.</param>
  85         /// <param name="point">Coordinates.</param>
  86         public void SetTile(char tile, Point point)
  87         {
  88             mTiles.Add(tile, GetRectangleForTile(point));
  89         }
  90
  91
  92         /// <summary>
  93         /// Draw a tile to the screen.
  94         /// </summary>
  95         /// <param name="spriteBatch">The b2bomber.</param>
  96         /// <param name="tile">The tile.</param>
  97         /// <param name="screenRect">The screen rectangle to draw at.</param>
  98         public void Draw(SpriteBatch spriteBatch, char tile, Rectangle screenRect)
  99         {
 100             spriteBatch.Draw(mTexture, screenRect, GetRectangleForTile(tile), Color.White);
 101         }
 102
 103         #endregion
 104
 105
 106         #region Private Variables
 107
 108         Texture2D mTexture;
 109         int mWidth;
 110         int mHeight;
 111         int mTileW;
 112         int mTileH;
 113         Dictionary<char, Rectangle> mTiles = new Dictionary<char, Rectangle>();
 114
 115         #endregion
 116     }
 117 }