public SnakeBody(int _x, int _y, Color _col, bool _ex, SnakeProperty _p)
{
x = _x;
y = _y;
color = _col;
exist = _ex;
proty = _p;
}
/// <summary>
/// 蛇身前进一步
/// </summary>
/// <param name="dir">前进方向</param>
/// <returns>蛇生命值</returns>
private SnakeLife SnakeMoveStep(SnakeDirection dir)
{
SnakeBody tail = new SnakeBody(0, 0, _SColor, true, SnakeProperty.Body);
tail.x = _SnakeList[_SnakeList.Count - 1].x;//保存蛇尾坐标
tail.y = _SnakeList[_SnakeList.Count - 1].y;
SnakeBody body_t = new SnakeBody(0, 0, _SColor, true, SnakeProperty.Body);
for (int i = (_SnakeList.Count - 1); i > 0; i--)
{//更新蛇身坐标
body_t.x = _SnakeList[i - 1].x;
body_t.y = _SnakeList[i - 1].y;
_SnakeList[i] = body_t;
}
int dx = 0, dy = 0;
_GetVariation(dir, out dx, out dy); //根据移动方向获取移动xy轴上的增量
SnakeBody body_h = new SnakeBody(0, 0, _SColor, true, SnakeProperty.Head); //更新蛇头坐标
body_h.x = _SnakeList[0].x + dx;
body_h.y = _SnakeList[0].y + dy;
//穿墙处理
int _maxX = _Windows.Size.Width / _BodySize;
int _maxY = _Windows.Size.Height / _BodySize;
if (_CrossWall == false)
{
if ((body_h.x >= _maxX) || (body_h.x < 0) ||
(body_h.y >= _maxY) || (body_h.y < 0))
{
_Life = SnakeLife.Die;
}
}
if (body_h.x >= _maxX)
{
body_h.x = 0;
}
if (body_h.x < 0)
{
body_h.x = _maxX - 1;
}
if (body_h.y >= _maxY)
{
body_h.y = 0;
}
if (body_h.y < 0)
{
body_h.y = _maxY - 1;
}
_SnakeList[0] = body_h;//更新蛇头坐标
//判断是否吃到食物或咬到自己（在未更新坐标之前预判）
int foodx = 0, foody = 0;
SnakeProperty p = _SnakeGetPointProperty(_SnakeList[0].x, _SnakeList[0].y);
switch (p)
{
case SnakeProperty.Food:
Console.WriteLine("SnakeProperty: " + p.ToString() + " SnakeLife: " + _Life.ToString());
//吃到食物后产生一个食物，蛇身长度增加
if (_SnakeGetRandomXY(out foodx, out foody)) //创建食物
{
_Food.x = foodx;
_Food.y = foody;
_SnakeList.Add(tail); //增加蛇身长度
_Score++; //得分增加
_Life = SnakeLife.Live;
}
else
{
_Life = SnakeLife.Win;
//return _Life;
}
break;
case SnakeProperty.Body:
case SnakeProperty.Wall:
Console.WriteLine("SnakeProperty: " + p.ToString() + " SnakeLife: " + _Life.ToString());
_Life = SnakeLife.Die; //死亡
//return _Life;
break;
case SnakeProperty.Head:
case SnakeProperty.Null:
default:
_Life = SnakeLife.Live;
break;
}
_SnakeClearPoint(tail); //清除蛇尾
_SnakeReDrawGame(); //更新显示蛇身
return(_Life);
}