/// <summary>
/// Calculates new moves of an enemy.
/// If player is close enough the sprite will follow player using AStar algorithm.
/// </summary>
/// <param name="gameTime">Instance of GameTime class that is used to calculate time elapsed</param>
public override void Update(GameTime gameTime)
{
if (Delay == 0)
{
var oldPosition = Position;
if (IsPlayerInRange)
{
var astar = new AGwiazdka(board);
var path = astar.FindPath(board.Fields[this.Position.X, this.Position.Y],
board.Fields[board.Player.Position.X, board.Player.Position.Y]);
Field lastPoint = null;
if (path != null)
{
lastPoint = path.LastOrDefault();
}
if (lastPoint != null)
{
Position = new Point(lastPoint.X, lastPoint.Y);
board.ChangePosition(oldPosition, this);
}
}
else
{
timeElapsed += gameTime.ElapsedGameTime.TotalMilliseconds;
var newPosition = Position;
if (timeElapsed >= timeBeforeDirectionChange)
{
timeElapsed = 0;
ChangeDirection();
}
newPosition = new Point(newPosition.X + _direction.X, newPosition.Y + _direction.Y);
newPosition = board.AdjustToBoardSize(newPosition);
if (board.IsPositionValidExceptPlayer(newPosition))
{
Position = newPosition;
board.ChangePosition(oldPosition, this);
}
else
{
ChangeDirection();
}
}
}
base.Update(gameTime);
Delay = (Delay + 1) % 20;
}
/// <summary>
/// Calculates moves for monster that will follow user using Astar algorithm
/// </summary>
/// <param name="gameTime"></param>
public override void Update(GameTime gameTime)
{
if (Delay == 0)
{
var astar = new AGwiazdka(board);
var path = astar.FindPath(board.Fields[this.Position.X, this.Position.Y],
board.Fields[board.Player.Position.X, board.Player.Position.Y]);
Field lastPoint = null;
if (path != null)
{
lastPoint = path.LastOrDefault();
}
if (lastPoint != null)
{
var oldPosition = Position;
Position = new Point(lastPoint.X, lastPoint.Y);
board.ChangePosition(oldPosition, this);
}
}
base.Update(gameTime);
Delay = (Delay + 1) % 25;
}