public Food(int id, Point position, int nutrition, int lifespan) : base(FoodService.GetName(id), position)
{
Id_real = id;
Nutrition_real = nutrition;
LifeSpan_real = lifespan;
}
public string Move()
{
//change direction if scheduled
ChangeDirection();
Point newPosition = new Point(
SnakeParts[0].Position.X + moveCoordinate.X,
SnakeParts[0].Position.Y + moveCoordinate.Y); //new position for the head
//check the next tile
//SPECIAL CASE: if out of bounds, wrap around
if (newPosition.X == BoardSizeX)
{
newPosition.X = 0;
}
else if (newPosition.X == -1)
{
newPosition.X = BoardSizeX - 1;
}
if (newPosition.Y == BoardSizeY)
{
newPosition.Y = 0;
}
else if (newPosition.Y == -1)
{
newPosition.Y = BoardSizeY - 1;
}
ushort nextValue = Board[newPosition.X, newPosition.Y];
//NOT SO SPECIAL CASE: check if next value is a wall or snake part
switch (nextValue)
{
case (int)BoardValue.SnakePart:
//SPECIAL CASE: if next tile is the last snake part, don't crash but continue moving
if (!(newPosition.X == SnakeParts[SnakeParts.Count - 1].Position.X && newPosition.Y == SnakeParts[SnakeParts.Count - 1].Position.Y))
{
//die
return(Die("Intersection"));
}
break;
case (int)BoardValue.Wall:
//die
return(Die("Wall"));
}
if (FoodService.IsBoardValueFruit(nextValue))
{
EatCurrentFood(nextValue, newPosition);
}
//move the whole body
Point prevPosition = SnakeParts[0].Position;
SnakeParts[0].Position = newPosition;
Board[newPosition.X, newPosition.Y] = (int)BoardValue.SnakeHead;
for (int i = 1; i < SnakeParts.Count; ++i)
{
Point currPosition = SnakeParts[i].Position;
SnakeParts[i].Position = prevPosition;
Board[prevPosition.X, prevPosition.Y] = (int)BoardValue.SnakePart;
prevPosition = currPosition;
}
//grow if you can
if (toGrow > 0)
{
SnakeParts.Add(new SnakePart("SnakePart", prevPosition));
Board[prevPosition.X, prevPosition.Y] = (int)BoardValue.SnakePart;
toGrow--;
}
else
{ //cant't grow so set last board value to 0
Board[prevPosition.X, prevPosition.Y] = 0;
}
//didn't die
return("");
}