public void Grow()
{
var oldTailCoords = Tail.Coords;
var newTailCoords = new Coordinates();
switch (CurrentTailDirection)
{
case Direction.Up:
newTailCoords = new Coordinates(oldTailCoords.Row - 1, oldTailCoords.Column);
break;
case Direction.Down:
newTailCoords = new Coordinates(oldTailCoords.Row + 1, oldTailCoords.Column);
break;
case Direction.Left:
newTailCoords = new Coordinates(oldTailCoords.Row, oldTailCoords.Column - 1);
break;
case Direction.Right:
newTailCoords = new Coordinates(oldTailCoords.Row, oldTailCoords.Column + 1);
break;
}
var newBlock = new SnakeBlock(newTailCoords, Tail.Index + 1);
Blocks.Add(newBlock);
}
public void Move()
{
var oldBlockCoords = Head.Coords;
var newBlockCoords = new Coordinates();
switch (CurrentHeadDirection)
{
case Direction.Up:
newBlockCoords = new Coordinates(oldBlockCoords.Row - 1, oldBlockCoords.Column);
break;
case Direction.Down:
newBlockCoords = new Coordinates(oldBlockCoords.Row + 1, oldBlockCoords.Column);
break;
case Direction.Left:
newBlockCoords = new Coordinates(oldBlockCoords.Row, oldBlockCoords.Column - 1);
break;
case Direction.Right:
newBlockCoords = new Coordinates(oldBlockCoords.Row, oldBlockCoords.Column + 1);
break;
}
Head = new SnakeBlock(newBlockCoords, Head.Index);
for (int i = 1; i < this.Blocks.Count; ++i)
{
newBlockCoords = oldBlockCoords;
oldBlockCoords = this.Blocks[i].Coords;
this.Blocks[i] = new SnakeBlock(newBlockCoords, this.Blocks[i].Index);
}
}
public void MoveTo(Block block)
{
var oldBlockCoords = Head.Coords;
var newBlockCoords = block.Coords;
Head = new SnakeBlock(newBlockCoords, Head.Index);
for (int i = 1; i < this.Blocks.Count; ++i)
{
newBlockCoords = oldBlockCoords;
oldBlockCoords = this.Blocks[i].Coords;
this.Blocks[i] = new SnakeBlock(newBlockCoords, this.Blocks[i].Index);
}
}
