/// <summary>
/// 蛇的转向
/// </summary>
/// <param name="nextDirection">想要改变的方向</param>
public void TurnDirection(util.Direction nextDirection)
{
switch (_direction)
{
case util.Direction.Up:
if (nextDirection == util.Direction.Right)
{
_direction = nextDirection;
}
else if (nextDirection == util.Direction.Left)
{
_direction = nextDirection;
}
break;
case util.Direction.Down:
if (nextDirection == util.Direction.Right)
{
_direction = nextDirection;
}
else if (nextDirection == util.Direction.Left)
{
_direction = nextDirection;
}
break;
case util.Direction.Left:
if (nextDirection == util.Direction.Up)
{
_direction = nextDirection;
}
else if (nextDirection == util.Direction.Down)
{
_direction = nextDirection;
}
break;
case util.Direction.Right:
if (nextDirection == util.Direction.Up)
{
_direction = nextDirection;
}
else if (nextDirection == util.Direction.Down)
{
_direction = nextDirection;
}
break;
}
}
private Snake()
{
_blocks.Add(new Block(true, new Point(util.Width / 2, util.Height / 2))); //初始化时只有蛇头
_length = 1;
_direction = util.Direction.NULL;
}
