//Override the Equals method to check for end point node.
public override bool Equals(object obj)
{
WalledMazeNode mazeNode = obj as WalledMazeNode;
if (mazeNode == null)
{
return(false);
}
if (object.ReferenceEquals(mazeNode, this))
{
return(true);
}
return(mazeNode.ColPosition == this.ColPosition && mazeNode.RowPosition == this.RowPosition && mazeNode.State == this.State);
}
/// <summary>
/// Scans the image and stores information.
/// </summary>
private void InitializeMaze(string imagePath, string wallColor, string gapColor, string startColor, string finishColor)
{
Bitmap mazeImage = null;
try
{
mazeImage = new Bitmap(imagePath);
}
catch (ArgumentException)
{
throw new ArgumentException("Unable to convert the file to bitmap.");
}
_maze = new WalledMazeNode[mazeImage.Height, mazeImage.Width];
_height = mazeImage.Height;
_width = mazeImage.Width;
for (i = 0; i < _height; i++)
{
for (j = 0; j < _width; j++)
{
Color color = mazeImage.GetPixel(j, i);
if (color.Name == wallColor)
{
_maze[i, j] = new WalledMazeNode(i, j)
{
State = WalledMazeNodeState.Blocked
};
continue;
}
else if (color.Name == startColor)
{
_maze[i, j] = new WalledMazeNode(i, j)
{
State = WalledMazeNodeState.Gap
};
if (_source == null)
{
_source = _maze[i, j];
}
}
else if (color.Name == finishColor)
{
_maze[i, j] = new WalledMazeNode(i, j)
{
State = WalledMazeNodeState.Gap
};
if (_destination == null)
{
_destination = _maze[i, j];
}
}
else if (color.Name == gapColor)
{
_maze[i, j] = new WalledMazeNode(i, j)
{
State = WalledMazeNodeState.Gap
};
}
else
{
//Invalid color.
throw new Exception(string.Format("Color {0} is an illegal color. Please use colors specified.", color.Name));
}
}
}
}