public WumpusChaseAnimation(int width, int height, int gridSize, int pathLength, double secondsPerMove)
{
Width = width;
Height = height;
GridSize = gridSize;
SecondsPerMove = secondsPerMove;
Path = new SnakePath(pathLength, GetPointOfInterest());
}
private void PickNextPosition()
{
// Start with the current point as a default
Vector2 CurrentPoint = Path.LatestValue;
// Create a list to store the valid moves
List <Vector2> ValidMoves = new List <Vector2>();
// Try each direction
for (int Direction = 0; Direction < 4; Direction++)
{
// Calculate the target point after the move
Vector2 NewPoint = GetPointAtDirection(CurrentPoint, Direction);
// Add it to the list if it is valid
if (ValidateNewPoint(NewPoint))
{
ValidMoves.Add(NewPoint);
}
}
// If there aren't any valid moves (we have trapped ourselves)
// restart at a random position
if (ValidMoves.Count <= 0)
{
Path = new SnakePath(Path.Length, GetPointOfInterest());
}
else
{
// Get the mouse position
Vector2 MousePos = Mouse.GetState().Position.ToVector2();
// If it isn't in our game window, just move randomly
if (IsOutOfBounds(MousePos))
{
Path.Enqueue(ValidMoves.GetRandom());
}
// If the mouse is in the window, find the closest valid move and
// add it to the snake path
else
{
Path.Enqueue(ValidMoves.OrderBy(p => p.Distance(MousePos)).First());
}
}
}
