// Returns a copy of recieved field
public Field GetFieldCopy(Point currentPoint)
{
Field fieldCopy;
switch (this[currentPoint])
{
case Wall w:
fieldCopy = new Wall(currentPoint);
break;
case Food f:
fieldCopy = new Food(currentPoint);
break;
case SnakeHead h:
Direction currentDirection = h.Direction;
fieldCopy = new SnakeHead(currentPoint, currentDirection);
break;
case SnakeBodyPart b:
fieldCopy = new SnakeBodyPart(currentPoint);
break;
case Empty e:
fieldCopy = new Empty(currentPoint);
break;
default:
throw new Exception("Unable to find type");
}
return(fieldCopy);
}
// Update object of type snake. Only updates fields that has been changed
public void UpdateSnakePosition(Snake snake, bool bodyAdded)
{
// Place new snake head on grid
this[snake.Head.Point] = snake.Head;
// If snake has a body, replace previous position of snake head with snake body
if (snake.HasBody)
{
this[previousSnakeHeadPosition] = new SnakeBodyPart(previousSnakeHeadPosition);
}
// If no body added in this round, delete tail
if (!bodyAdded)
{
if (this[previousSnakeTailPosition] is Wall)
{
}
this[previousSnakeTailPosition] = new Empty(previousSnakeTailPosition);
}
// Copy position of head and tail to use when updating next time
previousSnakeHeadPosition = new Point(snake.Head.Point.Row, snake.Head.Point.Column);
previousSnakeTailPosition = new Point(snake.Body.Last().Point.Row, snake.Body.Last().Point.Column);
}