/// <summary>
/// a snake with a direction.
/// </summary>
/// <param name="d">initial direction</param>
public Snake(Direction d)
{
this.Direction = d;
this.Body = new LinkedList<Dot>();
for (int i = 3; i >= 0; i--)
{
Dot newD = new Dot(i, 0);
this.Body.AddLast(newD);
}
}
/// <summary>
///
/// </summary>
/// <param name="dot"></param>
/// <param name="isFood"></param>
private void ShowDot(Dot dot, bool isFood)
{
if (isFood)
{
g.FillEllipse(this.pen, dot.PointReal.X, dot.PointReal.Y, dot.Size.Width, dot.Size.Height);
}
else
{
g.FillRectangle(this.pen, dot.PointReal.X, dot.PointReal.Y, dot.Size.Width, dot.Size.Height);
}
}
/// <summary>
/// Test if the snake hits the wall.
/// </summary>
/// <param name="newHead"></param>
/// <returns>True if it hits the wall.</returns>
private bool IsWallOrBodyHit(Dot newHead)
{
if (newHead.Point.X < 0 || newHead.Point.X >= Consts.MAX_X ||
newHead.Point.Y < 0 || newHead.Point.Y >= Consts.MAX_Y)
{
return true;
}
if (this.gameData.Snake.Body.Contains(newHead))
{
return true;
}
return false;
}
/// <summary>
/// Test if the snake hits the food.
/// </summary>
/// <param name="newHead">newHead</param>
/// <returns>True if the snake head is at the same position with the food.</returns>
private bool IsFoodEaten(Dot newHead)
{
return this.gameData.Food.Equals(newHead);
}
/// <summary>
/// Generates the next food instance.
/// </summary>
/// <returns>The instance of next food</returns>
private Dot GetNextFood()
{
int x, y;
Dot d;
do
{
x = this.rand.Next(0, Consts.MAX_X);
y = this.rand.Next(0, Consts.MAX_Y);
d = new Dot(x, y);
} while (this.gameData.Snake.Body.Contains(d));
return d;
}
/// <summary>
///
/// </summary>
/// <param name="dot"></param>
private void FadeDot(Dot dot)
{
g.FillRectangle(this.penErase, dot.PointReal.X, dot.PointReal.Y, dot.Size.Width, dot.Size.Height);
}
