/// <summary>
/// 移动蛇
/// </summary>
private void MoveSnake()
{
ControlHost host = Native.Host;
int bodySize = m_bodys.Count;
SnakeBody lastBody = m_bodys[bodySize - 1];
int left = lastBody.Left;
int top = lastBody.Top;
//改变蛇身每个关节的位置
for (int i = 0; i < bodySize; i++)
{
SnakeBody body = m_bodys[i];
switch (body.Direction)
{
//向下
case SnakeDirection.Down:
body.Top += body.Height;
break;
//向左
case SnakeDirection.Left:
body.Left -= body.Width;
break;
//向右
case SnakeDirection.Right:
body.Left += body.Width;
break;
//向上
case SnakeDirection.Up:
body.Top -= body.Height;
break;
}
}
//判断游戏失败
if (IsLose())
{
m_play.GameState = GameState.Lose;
m_play.BringToFront();
}
else
{
bool newFood = false;
//判断吃食物
int foodSize = m_foods.Count;
for (int i = 0; i < foodSize; i++)
{
Food food = m_foods[i];
RECT tempRect = new RECT();
RECT bRect = m_bodys[0].Bounds;
RECT fRect = food.Bounds;
if (host.GetIntersectRect(ref tempRect, ref bRect, ref fRect) > 0)
{
m_eatCount++;
//添加关节
RECT rc = new RECT(left, top, left + SNAKE_SIZE, top + SNAKE_SIZE);
SnakeBody body = new SnakeBody(rc);
m_bodys.Add(body);
AddControl(body);
body.BringToFront();
//移除食物
RemoveControl(food);
m_foods.Remove(food);
newFood = true;
break;
}
}
//改变移动方向
bodySize = m_bodys.Count;
for (int i = bodySize - 1; i > 0; i--)
{
m_bodys[i].Direction = m_bodys[i - 1].Direction;
}
//设置新的食物
if (newFood)
{
AddFood();
}
}
Invalidate();
}