void EatFood()
{
var temp = tail;
var next = tail.Next;
tail = CreateTile(
tail.Transform.Position.X + (tail.Transform.Position.X - next.Transform.Position.X),
tail.Transform.Position.Y + (tail.Transform.Position.Y - next.Transform.Position.Y));
tail.Next = temp;
FoodsEatenCount++;
if (FoodEaten != null)
{
FoodEaten(this, EventArgs.Empty);
}
if (speed < MaxSpeed)
{
speed += Acceleration;
}
Log.Debug("{0} foods eaten. New speed {1}", FoodsEatenCount, speed);
}
private SnakeTile CreateTile(float x, float y)
{
var tile = new SnakeTile(
x,
y,
Context,
EatFood,
OnDied,
OnDied);
return(tile);
}
private void Deploy(float x, float y, int length)
{
if (length < 3)
{
throw new ArgumentException("length must be greater than 2", "length");
}
x += bounds.Left;
y += bounds.Top;
tail = CreateTile(x++, y);
tail.Next = CreateTile(x++, y);
Head = CreateTile(x++, y);
tail.Next.Next = Head;
length -= 3;
for (int i = 0; i < length; i++, x++)
{
Head.Next = CreateTile(x, y);
Head = Head.Next;
}
}
private void Move()
{
var hpos = Head.Transform.Position.Round();
var newPosition = Point.Lerp(
hpos,
new Point(hpos.X + movingDirectionX, hpos.Y + movingDirectionY),
(Context.Time.SinceSceneStart - lastPositionChangeTime) * speed)
.Round();
if (newPosition != hpos)
{
Head.Pixel = SnakeTile.BodyPixel;
tail.Transform.Position = newPosition;
Head.Next = tail;
Head = tail;
tail = tail.Next;
Head.Next = null;
Head.Pixel = SnakeTile.HeadPixel;
lastPositionChangeTime = Context.Time.SinceSceneStart;
}
}