//****************************************************************//
// This constructors constructs an instance of the game engine. It//
// requires to know the level and the size of each tile. //
//****************************************************************//
public CGameEngine(CLevel level)
{
m_level = level;
//////////////////////////////////////////////////
// The board dimensions are in units of pixels.
m_boardDims[0] = m_level.Width * CGameTextures.TILE_SIZE;
m_boardDims[1] = m_level.Height * CGameTextures.TILE_SIZE;
}
/// <summary>
/// This function imports the level from the given directory. It is assumed
/// the text file containing the level is called Level.txt.
/// </summary>
/// <param name="directory">The directory the level is stored in.</param>
/// <returns>The loaded level.</returns>
public static CLevel ImportLevel(string directory)
{
//////////////////////////////////////////////////////
// Create an instance of a level to populate.
CLevel ret = new CLevel();
using (StreamReader fs = new StreamReader(directory + "\\Level.txt"))
{
///////////////////////////////////////////////////////////
// Read in the dimensions of the level.
string strDimY = Regex.Match(fs.ReadLine(), @"\d+").Value;
int DimY = int.Parse(strDimY);
string strDimX = Regex.Match(fs.ReadLine(), @"\d+").Value;
int DimX = int.Parse(strDimX);
///////////////////////////////////////////////////////////
// Size the level.
ret.Resize(DimX, DimY);
///////////////////////////////////////////////////////////
// Read in each tile type.
for (int y = 0; y < DimY; y++)
{
string strRow = fs.ReadLine();
for (int x = 0; x < DimX; x++)
{
if (strRow[x] == 'F')
{
ret.SetTileType(x, y, eTileType.Floor);
}
else
{
ret.SetTileType(x, y, eTileType.Wall);
}
}
}
/////////////////////////////////////////////////////////////
// Get the player start position.
string strIn = fs.ReadLine();
string[] bits = strIn.Split(',');
ret.StartPosition = new CPoint2i(int.Parse(Regex.Match(bits[0], @"\d+").Value),
int.Parse(Regex.Match(bits[1], @"\d+").Value));
//////////////////////////////////////////////////////////////
// Get the goal position.
strIn = fs.ReadLine();
bits = strIn.Split(',');
ret.GoalPosition = new CPoint2i(int.Parse(Regex.Match(bits[0], @"\d+").Value),
int.Parse(Regex.Match(bits[1], @"\d+").Value));
//////////////////////////////////////////////////////////////
// Get the time available.
ret.Time = int.Parse(Regex.Match(fs.ReadLine(), @"\d+").Value);
//////////////////////////////////////////////////////////////
// Get the number of enemies in the level.
int numEnemies = int.Parse(Regex.Match(fs.ReadLine(), @"\d+").Value);
ret.EnemyPositions.Capacity = numEnemies;
///////////////////////////////////////////////////////////////
// Read in each enemy from the level.
for (int i = 0; i < numEnemies; i++)
{
strIn = fs.ReadLine();
bits = strIn.Split(',');
ret.EnemyPositions.Add(new CPoint2i(int.Parse(Regex.Match(bits[0], @"\d+").Value),
int.Parse(Regex.Match(bits[1], @"\d+").Value)));
}
//////////////////////////////////////////////////////////////
// Read in the fire locations.
int numFire = int.Parse(Regex.Match(fs.ReadLine(), @"\d+").Value);
ret.FirePositions.Capacity = numFire;
for (int i = 0; i < numFire; i++)
{
strIn = fs.ReadLine();
bits = strIn.Split(',');
ret.FirePositions.Add(new CPoint2i(int.Parse(Regex.Match(bits[0], @"\d+").Value),
int.Parse(Regex.Match(bits[1], @"\d+").Value)));
}
}
/////////////////////////////////////////////////////////
// return the level.
return(ret);
}
/// <summary>
/// This function exports the given level to the given directory.
/// If there is already a level at the given directory it will be
/// overwritten.
/// </summary>
/// <param name="levelToExport">The level to export.</param>
/// <param name="directory">The directory to save the level.</param>
public static void ExportLevel(CLevel levelToExport, string directory)
{
/////////////////////////////////////////////////////
// Save out level:
Directory.CreateDirectory(directory);
using (StreamWriter fs = new StreamWriter(directory + "\\Level.txt"))
{
//////////////////////////////////////////////////////
// Write the number of tiles in the height and width.
fs.WriteLine("Height=" + levelToExport.Height.ToString());
fs.WriteLine("Width=" + levelToExport.Width.ToString());
//////////////////////////////////////////////////////
// Write out the layout of the tiles.
for (int y = 0; y < levelToExport.Height; y++)
{
for (int x = 0; x < levelToExport.Width; x++)
{
if (levelToExport.GetTileType(x, y) == eTileType.Floor)
{
fs.Write('F');
}
else
{
fs.Write('W');
}
}
fs.WriteLine();
}
//////////////////////////////////////////////////////
// Save the start position of the player and the goal
// position.
fs.WriteLine("StartPosition=" + levelToExport.StartPosition.ToString());
fs.WriteLine("GoalPosition=" + levelToExport.GoalPosition.ToString());
fs.WriteLine("TimeToComplete=" + levelToExport.Time.ToString());
//////////////////////////////////////////////////////
// Write out the number of enemies and the position of
// each.
fs.WriteLine("NumEnemies=" + levelToExport.EnemyPositions.Count.ToString());
for (int i = 0; i < levelToExport.EnemyPositions.Count(); i++)
{
fs.WriteLine(levelToExport.EnemyPositions[i].ToString());
}
fs.WriteLine("NumFire=" + levelToExport.FirePositions.Count.ToString());
for (int i = 0; i < levelToExport.FirePositions.Count(); i++)
{
fs.WriteLine(levelToExport.FirePositions[i].ToString());
}
}
}
//****************************************************************//
// This function is used as an event handler for the load click *//
// event. This is used to load a new level. In addition to *//
// the data required for the level it also ensures the board is *//
// displayed. *//
//****************************************************************//
private void btnLoad_Click(object sender, RoutedEventArgs e)
{
////////////////////////////////////////////////////////////
// clear any existing children from the canvas.
cvsMainScreen.Children.Clear();
///////////////////////////////////////////////////////////
// Get the directory where the level data is stored and
// load the data in.
string fileDir = txtLevelDir.Text;
currentLevel = CLevelParser.ImportLevel(fileDir);
gameTextures = CLevelParser.ImportTextures(fileDir);
///////////////////////////////////////////////////////////
// Draw the set of wall and floor tiles for the current
// level and the goal icon. This is part of the game
// we do not expect to change as it cannot move.
DrawLevel();
//////////////////////////////////////////////////////////
// Add a game state, this represents the position and velocity
// of all the enemies and the player. Basically, anything
// that is dynamic that we expect to move around.
gameState = new CGameState(currentLevel.EnemyPositions.Count());
///////////////////////////////////////////////////////////
// Set up the player to have the correct .bmp and set it to
// its initial starting point. The player's position is stored
// as a tile index on the Clevel class, this must be converted
// to a pixel position on the game state.
playerIcon = new Image();
playerIcon.Width = CGameTextures.TILE_SIZE;
playerIcon.Height = CGameTextures.TILE_SIZE;
playerIcon.Source = gameTextures.PlayerIcon;
cvsMainScreen.Children.Add(playerIcon);
//////////////////////////////////////////////////////////
// Create instances of the enemies and fires for display. We must do
// this as each child on a canvas must be a distinct object,
// we could not simply add the same image multiple times.
enemyIcons = new Image[currentLevel.EnemyPositions.Count()];
for (int i = 0; i < currentLevel.EnemyPositions.Count(); i++)
{
enemyIcons[i] = new Image();
enemyIcons[i].Width = CGameTextures.TILE_SIZE;
enemyIcons[i].Height = CGameTextures.TILE_SIZE;
enemyIcons[i].Source = gameTextures.EnemyIcon;
cvsMainScreen.Children.Add(enemyIcons[i]);
}
fireIcons = new Image[currentLevel.FirePositions.Count()];
for (int i = 0; i < currentLevel.FirePositions.Count(); i++)
{
fireIcons[i] = new Image();
fireIcons[i].Width = CGameTextures.TILE_SIZE;
fireIcons[i].Height = CGameTextures.TILE_SIZE;
fireIcons[i].Source = gameTextures.FireIcon;
cvsMainScreen.Children.Add(fireIcons[i]);
CPoint2i tilePosition = CLevelUtils.GetPixelFromTileCoordinates(new CPoint2i(currentLevel.FirePositions[i].X, currentLevel.FirePositions[i].Y));
Canvas.SetLeft(fireIcons[i], tilePosition.X);
Canvas.SetTop(fireIcons[i], tilePosition.Y);
}
loadTextures();
////////////////////////////////////////////////////////////
// Set each instance of a dynamic object to its initial position
// as defined by the current level object.
InitialiseGameState();
////////////////////////////////////////////////////////////
// Render the current game state, this will render the player
// and the enemies in their initial position.
RenderGameState();
}