/// <summary>
/// 更具方向获取x轴和y轴的增量
/// </summary>
/// <param name="dir">方向</param>
/// <param name="dx">x增量</param>
/// <param name="dy">y增量</param>
private void _GetVariation(SnakeDirection dir, out int dx, out int dy)
{
switch (dir)
{
case SnakeDirection.Up:
dx = 0;
dy = -1;
break;
case SnakeDirection.Down:
dx = 0;
dy = 1;
break;
case SnakeDirection.Left:
dx = -1;
dy = 0;
break;
case SnakeDirection.Right:
dx = 1;
dy = 0;
break;
default:
dx = 1;
dy = 0;
break;
}
}
private void StartNewGame()
{
bdrWelcomeMessage.Visibility = Visibility.Collapsed;
bdrHighscoreList.Visibility = Visibility.Collapsed;
bdrEndOfGame.Visibility = Visibility.Collapsed;
foreach (SnakePart snakeBodyPart in snakeParts)
{
if (snakeBodyPart.UiElement != null)
{
GameArea.Children.Remove(snakeBodyPart.UiElement);
}
}
snakeParts.Clear();
if (snakeFood != null)
{
GameArea.Children.Remove(snakeFood);
}
currentScore = 0;
snakeLength = SnakeStartLength;
snakeDirection = SnakeDirection.Right;
snakeParts.Add(new SnakePart()
{
Position = new Point(SnakeSquareSize * 5, SnakeSquareSize * 5)
});
gameTickTimer.Interval = TimeSpan.FromMilliseconds(SnakeStartSpeed);
DrawSnake();
DrawSnakeFood();
UpdateGameStatus();
gameTickTimer.IsEnabled = true;
}
private void StartNewGame()
{
foreach (snakePart snakeBodyPart in snakeBodyParts)
{
if (snakeBodyPart.UiElement != null)
{
GameArea.Children.Remove(snakeBodyPart.UiElement);
}
}
snakeBodyParts.Clear();
if (food != null)
{
GameArea.Children.Remove(food);
}
score = 0;
snakeLength = SnakeStartingLength;
snakeDirection = SnakeDirection.Right;
snakeBodyParts.Add(new snakePart()
{
Position = new Point(SnakePartsSize * 5, SnakePartsSize * 5)
});
gameTimer.Interval = TimeSpan.FromMilliseconds(SnakeStartingSpeed);
DrawSnake();
DrawFood();
UpdateGameStatus();
gameTimer.IsEnabled = true;
}
public bool is_dir_ok(SnakeDirection dir)
{
Point n_point = dir2coord(dir);
// Wall collision
if (n_point.X < 0 || n_point.X >= GridWidth || n_point.Y < 0 || n_point.Y >= GridHeight)
{
return(false);
}
// Snake Collision
for (int i = 0; i < enemies.Length; i++)
{
if (enemies[i].Alive)
{
if (enemies[i].BodyParts.Any(b => b.X == n_point.X && b.Y == n_point.Y))
{
return(false);
}
}
}
if (BodyParts.Take(BodyLength - 1).Any(b => b.X == HeadPosX && b.Y == HeadPosY))
{
return(false);
}
if (((int)dir + 2) % 4 == (int)Direction)
{
return(false);
}
return(true);
}
List <Point> GetNextPossiblePoints(Point p, SnakeDirection d)
{
List <SnakeDirection> dirs = GetPossibleDirections(d);
List <Point> points = new List <Point>();
for (int i = 0; i < dirs.Count; i++)
{
int xdir, ydir;
DirectionToXY(dirs[i], out xdir, out ydir);
points.Add(new Point(p.X + xdir, p.Y + ydir));
}
return(points);
}
private void Initialize()
{
SnakePos = new List <Tuple <int, int> >();
for (var i = 0; i < 3; i++)
{
SnakePos.Add(_snakePos);
}
_directionToMove = SnakeDirection.Right;
_direction = _directionToMove;
_grow = false;
_moveCounter = _speed;
IsSnakeNew = true;
}
/// <summary>
/// 贪吃蛇游戏初始化
/// </summary>
public void SnakeGameRenew()
{
SnakeBody _body;
_SnakeList.Clear();//清空所有数据
//初始化游戏运行数据
_Direction = SnakeDirection.Right;
_Life = SnakeLife.Live;
_Score = 0;
//初始化蛇头
_body = new SnakeBody(0, 0, _SColor, true, SnakeProperty.Head);
_SnakeList.Add(_body);
//创建初始蛇身
int initLength = 3;
if (initLength > 1)
{
int dx = 0, dy = 0;
int x = _SnakeList[0].x, y = _SnakeList[0].y;
_GetVariation(_Direction, out dy, out dy);
for (int i = 1; i < initLength; i++)
{
x -= (dx * _BodySize);
y -= (dy * _BodySize);
_body = new SnakeBody(x, y, _SColor, true, SnakeProperty.Body);
_SnakeList.Add(_body);
}
}
//初始化食物
int fx = 0, fy = 0;
_Food.color = _SColor;
_Food.exist = true;
_Food.proty = SnakeProperty.Food;
_SnakeGetRandomXY(out fx, out fy);
_Food.x = fx;
_Food.y = fy;
//重绘游戏画面
_SnakeClearWindow();
_SnakeReDrawGame();
}
List <SnakeDirection> GetPossibleDirections(SnakeDirection dir)
{
List <SnakeDirection> dirs = new List <SnakeDirection>();
if (Env.constRand.Next(2) == 0)
{
dirs.Add((SnakeDirection)(((int)dir + 1) % 4));
dirs.Add((SnakeDirection)(((int)dir + 3) % 4));
}
else
{
dirs.Add((SnakeDirection)(((int)dir + 3) % 4));
dirs.Add((SnakeDirection)(((int)dir + 1) % 4));
}
dirs.Add(dir);
return(dirs);
}
private void Window_KeyUp(object sender, KeyEventArgs e)
{
SnakeDirection originalSnakeDirection = snakeDirection;
switch (e.Key)
{
case Key.Up:
if (snakeDirection != SnakeDirection.Down)
{
snakeDirection = SnakeDirection.Up;
}
break;
case Key.Down:
if (snakeDirection != SnakeDirection.Up)
{
snakeDirection = SnakeDirection.Down;
}
break;
case Key.Left:
if (snakeDirection != SnakeDirection.Right)
{
snakeDirection = SnakeDirection.Left;
}
break;
case Key.Right:
if (snakeDirection != SnakeDirection.Left)
{
snakeDirection = SnakeDirection.Right;
}
break;
case Key.Space:
StartNewGame();
break;
}
if (snakeDirection != originalSnakeDirection)
{
MoveSnake();
}
}
public void Movement()
{
if (--_moveCounter == 0)
{
IsSnakeNew = false;
_moveCounter = _speed;
_direction = _directionToMove;
//TODO: Maybe set a snake part length 50 to make it move faster
switch (Direction)
{
case SnakeDirection.Up:
//negative y
_snakePos = new Tuple <int, int>(_snakePos.Item1, _snakePos.Item2 - 1);
SnakePos.Add(_snakePos);
break;
case SnakeDirection.Right:
//positive x
_snakePos = new Tuple <int, int>(_snakePos.Item1 + 1, _snakePos.Item2);
SnakePos.Add(_snakePos);
break;
case SnakeDirection.Down:
//positive y
_snakePos = new Tuple <int, int>(_snakePos.Item1, _snakePos.Item2 + 1);
SnakePos.Add(_snakePos);
break;
case SnakeDirection.Left:
//negative x
_snakePos = new Tuple <int, int>(_snakePos.Item1 - 1, _snakePos.Item2);
SnakePos.Add(_snakePos);
break;
}
if (_grow != true)
{
SnakePos.RemoveAt(0);
}
_grow = false;
}
}
private void StartNewGame()
{
// Удаление змейки из предыдущей игры
foreach (SnakePart snakeBodyPart in snakeParts)
{
if (snakeBodyPart.UiElement != null)
{
GameArea.Children.Remove(snakeBodyPart.UiElement);
}
}
snakeParts.Clear();
if (snakeFood != null)
{
GameArea.Children.Remove(snakeFood);
}
// Перезапуск
currentScore = 0;
snakeLength = SnakeStartLength;
snakeDirection = SnakeDirection.Right;
snakeParts.Add(new SnakePart()
{
Position = new Point(SnakeSquareSize * 3, SnakeSquareSize * 5)
});
snakeParts.Add(new SnakePart()
{
Position = new Point(SnakeSquareSize * 4, SnakeSquareSize * 5)
});
snakeParts.Add(new SnakePart()
{
Position = new Point(SnakeSquareSize * 5, SnakeSquareSize * 5), IsHead = true
});
gameTickTimer.Interval = TimeSpan.FromMilliseconds(SnakeStartSpeed);
DrawGameArea();
DrawSnake();
DrawSnakeFood();
UpdateGameStatus();
gameTickTimer.IsEnabled = true;
}
private void GameArea_MouseLeftButtonDown(object sender, RoutedEventArgs e)
{
SnakeDirection originalSnakeDirection = snakeDirection;
if (originalSnakeDirection == SnakeDirection.Down)
{
snakeDirection = SnakeDirection.Right;
}
else if (originalSnakeDirection == SnakeDirection.Left)
{
snakeDirection = SnakeDirection.Down;
}
else if (originalSnakeDirection == SnakeDirection.Right)
{
snakeDirection = SnakeDirection.Up;
}
else if (originalSnakeDirection == SnakeDirection.Up)
{
snakeDirection = SnakeDirection.Left;
}
MoveSnake();
}
private Point dir2coord(SnakeDirection dir)
{
Point pos = new Point(HeadPosX, HeadPosY);
if (dir == SnakeDirection.Right)
{
pos.X += 1;
}
else if (dir == SnakeDirection.Down)
{
pos.Y += 1;
}
else if (dir == SnakeDirection.Left)
{
pos.X -= 1;
}
else if (dir == SnakeDirection.Up)
{
pos.Y -= 1;
}
return(pos);
}
protected override EnvSnake.Action GetAction()
{
if (!Alive)
{
return new EnvSnake.Action()
{
movementDirection = SnakeDirection.Right
}
}
;
int h = GridHeight;
int w = GridWidth;
int[] choice = null;
switch (Direction)
{
case SnakeDirection.Right:
choice = new int[] { 0, 1, 3 };
break;
case SnakeDirection.Down:
choice = new int[] { 0, 1, 2 };
break;
case SnakeDirection.Left:
choice = new int[] { 1, 2, 3 };
break;
case SnakeDirection.Up:
choice = new int[] { 0, 2, 3 };
break;
}
int r = Env.constRand.Next(3);
SnakeDirection dir = (SnakeDirection)choice[r];
//crash bot?
for (int i = 0; i < enemies.Length; i++)
{
for (int j = 0; j < enemies[i].BodyLength; j++)
{
if (Math.Pow(enemies[i].BodyParts[j].X - HeadPosX, 2) + Math.Pow(enemies[i].BodyParts[j].Y - HeadPosY, 2) == 1)
{
if (Direction == SnakeDirection.Down || Direction == SnakeDirection.Up)
{
if (HeadPosX <= w - HeadPosX)
{
dir = SnakeDirection.Right;
}
else
{
dir = SnakeDirection.Left;
}
}
else
{
if (HeadPosY <= h - HeadPosY)
{
dir = SnakeDirection.Down;
}
else
{
dir = SnakeDirection.Up;
}
}
}
}
}
// crash wall?
switch (dir)
{
case SnakeDirection.Right:
if (HeadPosX >= w - 3)
{
if (HeadPosY <= h - HeadPosY)
{
if (choice.Contains(1))
{
dir = SnakeDirection.Down;
}
else
{
dir = SnakeDirection.Left;
}
}
else
{
if (choice.Contains(3))
{
dir = SnakeDirection.Up;
}
else
{
dir = SnakeDirection.Left;
}
}
}
break;
case SnakeDirection.Down:
if (HeadPosY >= h - 3)
{
if (HeadPosX <= w - HeadPosX)
{
if (choice.Contains(0))
{
dir = SnakeDirection.Right;
}
else
{
dir = SnakeDirection.Up;
}
}
else
{
if (choice.Contains(2))
{
dir = SnakeDirection.Left;
}
else
{
dir = SnakeDirection.Up;
}
}
}
break;
case SnakeDirection.Left:
if (HeadPosX <= 2)
{
if (HeadPosY <= h - HeadPosY)
{
if (choice.Contains(1))
{
dir = SnakeDirection.Down;
}
else
{
dir = SnakeDirection.Right;
}
}
else
{
if (choice.Contains(3))
{
dir = SnakeDirection.Up;
}
else
{
dir = SnakeDirection.Right;
}
}
}
break;
case SnakeDirection.Up:
if (HeadPosY <= 2)
{
if (HeadPosX <= w - HeadPosX)
{
if (choice.Contains(0))
{
dir = SnakeDirection.Right;
}
else
{
dir = SnakeDirection.Down;
}
}
else
{
if (choice.Contains(2))
{
dir = SnakeDirection.Left;
}
else
{
dir = SnakeDirection.Down;
}
}
}
break;
}
return(new EnvSnake.Action()
{
movementDirection = dir,
});
}
protected override EnvSnake.Action GetAction()
{
SnakeDirection richtung = SnakeDirection.Right;
if (!this.Alive)
{
return(new EnvSnake.Action()
{
movementDirection = SnakeDirection.Down
});
}
if (HeadPosX == 27 && HeadPosY == 27)
{
}
if (this.HeadPosY + 1 == this.GridHeight)
{
if (this.HeadPosX + 1 == GridWidth)
{
richtung = SnakeDirection.Up;
return(new EnvSnake.Action()
{
movementDirection = richtung
});
}
else
{
richtung = SnakeDirection.Right;
}
}
if (this.HeadPosX - 1 == -1)
{
if (this.HeadPosY + 1 == this.GridHeight)
{
if (this.HeadPosX + 1 == this.GridWidth)
{
richtung = SnakeDirection.Up;
}
else
{
richtung = SnakeDirection.Right;
}
}
else
{
richtung = SnakeDirection.Down;
}
}
else if (this.HeadPosX + 1 == GridWidth)
{
if (this.HeadPosY + 1 == GridHeight)
{
richtung = SnakeDirection.Right;
}
else if (this.HeadPosY - 1 == -1)
{
if (this.HeadPosX - 1 == -1)
{
richtung = SnakeDirection.Down;
}
else
{
richtung = SnakeDirection.Left;
}
}
else
{
richtung = SnakeDirection.Up;
}
}
else
{
richtung = SnakeDirection.Right;
}
return(new EnvSnake.Action()
{
movementDirection = richtung
});
}
protected override EnvSnake.Action GetAction()
{
if (!Alive)
{
return new EnvSnake.Action()
{
movementDirection = SnakeDirection.Right
}
}
;
int h = GridHeight;
int w = GridWidth;
int[] choice = null;
switch (Direction)
{
case SnakeDirection.Right:
choice = new int[] { 0, 1, 3 };
break;
case SnakeDirection.Down:
choice = new int[] { 0, 1, 2 };
break;
case SnakeDirection.Left:
choice = new int[] { 1, 2, 3 };
break;
case SnakeDirection.Up:
choice = new int[] { 0, 2, 3 };
break;
}
int r = Env.constRand.Next(3);
SnakeDirection dir = (SnakeDirection)choice[r];
//crash bot?
for (int i = 0; i < enemies.Length; i++)
{
for (int j = 0; j < enemies[i].BodyLength; j++)
{
int diff_x = enemies[i].BodyParts[j].X - HeadPosX;
int diff_y = enemies[i].BodyParts[j].Y - HeadPosY;
if (Math.Sqrt(Math.Pow(Math.Abs(diff_x), 2) + Math.Pow(Math.Abs(diff_y), 2)) <= 2)
{
if (diff_x > 0) // want to go left
{
if (diff_y > 0) // want to go up
{
if (choice.Contains(3))
{
dir = SnakeDirection.Up;
}
else
{
dir = SnakeDirection.Left;
}
}
else // want to go down
{
if (choice.Contains(1))
{
dir = SnakeDirection.Down;
}
else
{
dir = SnakeDirection.Left;
}
}
}
else // want to go right
{
if (diff_y > 0) // want to go up
{
if (choice.Contains(3))
{
dir = SnakeDirection.Up;
}
else
{
dir = SnakeDirection.Right;
}
}
else // want to go down
{
if (choice.Contains(1))
{
dir = SnakeDirection.Down;
}
else
{
dir = SnakeDirection.Right;
}
}
}
}
}
}
// crash myself?
if (BodyLength > 4)
{
for (int i = 4; i < BodyLength; i++)
{
int diff_x = BodyParts[i].X - HeadPosX;
int diff_y = BodyParts[i].Y - HeadPosY;
if (Math.Sqrt(Math.Pow(Math.Abs(diff_x), 2) + Math.Pow(Math.Abs(diff_y), 2)) <= 2)
{
if (diff_x > 0) // want to go left
{
if (diff_y > 0) // want to go up
{
if (choice.Contains(3))
{
dir = SnakeDirection.Up;
}
else
{
dir = SnakeDirection.Left;
}
}
else // want to go down
{
if (choice.Contains(1))
{
dir = SnakeDirection.Down;
}
else
{
dir = SnakeDirection.Left;
}
}
}
else // want to go right
{
if (diff_y > 0) // want to go up
{
if (choice.Contains(3))
{
dir = SnakeDirection.Up;
}
else
{
dir = SnakeDirection.Right;
}
}
else // want to go down
{
if (choice.Contains(1))
{
dir = SnakeDirection.Down;
}
else
{
dir = SnakeDirection.Right;
}
}
}
}
}
}
// crash wall?
switch (dir)
{
case SnakeDirection.Right:
if (HeadPosX >= w - 3)
{
if (HeadPosY <= h - HeadPosY)
{
if (choice.Contains(1))
{
dir = SnakeDirection.Down;
}
else
{
dir = SnakeDirection.Left;
}
}
else
{
if (choice.Contains(3))
{
dir = SnakeDirection.Up;
}
else
{
dir = SnakeDirection.Left;
}
}
}
break;
case SnakeDirection.Down:
if (HeadPosY >= h - 3)
{
if (HeadPosX <= w - HeadPosX)
{
if (choice.Contains(0))
{
dir = SnakeDirection.Right;
}
else
{
dir = SnakeDirection.Up;
}
}
else
{
if (choice.Contains(2))
{
dir = SnakeDirection.Left;
}
else
{
dir = SnakeDirection.Up;
}
}
}
break;
case SnakeDirection.Left:
if (HeadPosX <= 2)
{
if (HeadPosY <= h - HeadPosY)
{
if (choice.Contains(1))
{
dir = SnakeDirection.Down;
}
else
{
dir = SnakeDirection.Right;
}
}
else
{
if (choice.Contains(3))
{
dir = SnakeDirection.Up;
}
else
{
dir = SnakeDirection.Right;
}
}
}
break;
case SnakeDirection.Up:
if (HeadPosY <= 2)
{
if (HeadPosX <= w - HeadPosX)
{
if (choice.Contains(0))
{
dir = SnakeDirection.Right;
}
else
{
dir = SnakeDirection.Down;
}
}
else
{
if (choice.Contains(2))
{
dir = SnakeDirection.Left;
}
else
{
dir = SnakeDirection.Down;
}
}
}
break;
}
return(new EnvSnake.Action()
{
movementDirection = dir,
});
}
/// <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);
}
protected override EnvSnake.Action GetAction()
{
SnakeDirection dir = Direction;
if (!Alive)
{
return new EnvSnake.Action()
{
movementDirection = SnakeDirection.Right
}
}
;
int x = this.HeadPosX;
int y = this.HeadPosY;
List <SnakeDirection> dirs = GetPossibleDirections(Direction);
List <SnakeDirection> freeDirs = new List <SnakeDirection>();
float bestWall = 1;
int bestIndex = 0;
for (int i = 0; i < dirs.Count; i++)
{
int xdir, ydir;
DirectionToXY(dirs[i], out xdir, out ydir);
float wall = IsWall(x + xdir, y + ydir);
if (wall == 0)
{
freeDirs.Add(dirs[i]);
}
if (wall < bestWall)
{
bestWall = wall;
bestIndex = i;
}
}
if (freeDirs.Count <= 1)
{
dir = dirs[bestIndex];
}
else
{
//get direction to next food
//add freedom
float bestScore = 999999999;
bestIndex = 0;
float bestDist = 99999999;
for (int i = 0; i < freeDirs.Count; i++)
{
//calculate distance to nearest food
int xdir, ydir;
DirectionToXY(freeDirs[i], out xdir, out ydir);
Vector2 newPos = new Vector2(x + xdir, y + ydir);
for (int j = 0; j < Food.Count; j++)
{
float border = 4;
float borderWeight = 3f;
float newDist = Math.Abs(Food[j].X - newPos.X) + Math.Abs(Food[j].Y - newPos.Y);
if (Food[j].X < border)
{
newDist += (border - Food[j].X) * borderWeight;
}
if (Food[j].Y < border)
{
newDist += (border - Food[j].Y) * borderWeight;
}
if (Food[j].X > GridWidth - border - 1)
{
newDist += (Food[j].X - (GridWidth - border - 1)) * borderWeight;
}
if (Food[j].Y > GridHeight - border - 1)
{
newDist += (Food[j].Y - (GridHeight - border - 1)) * borderWeight;
}
if (newDist < bestDist)
{
bestDist = newDist;
bestIndex = i;
}
}
}
dir = freeDirs[bestIndex];
}
return(new EnvSnake.Action()
{
movementDirection = dir,
});
}
protected override EnvSnake.Action GetAction()
{
if (!Alive)
{
return(new EnvSnake.Action()
{
movementDirection = SnakeDirection.Down,
});
}
Tuple <Point, SnakeDirection>[] dir_points = get_possible_directions();
float[] point_dists = new float[dir_points.Length];
int min_dist_idx = 0;
float global_min_food_dist = float.MaxValue;
bool[] head_collision = new bool[dir_points.Length];
int min_idx_no_head_collision = -1;
float global_min_food_dist_no_head_collision = float.MaxValue;
for (int i = 0; i < dir_points.Length; i++)
{
float min_food_dist = float.MaxValue;
for (int j = 0; j < Food.Count; j++)
{
float dist = calc_dist(Food[j], dir_points[i].Item1);
if (dist < min_food_dist)
{
min_food_dist = dist;
}
}
point_dists[i] = min_food_dist;
if (min_food_dist < global_min_food_dist)
{
global_min_food_dist = min_food_dist;
min_dist_idx = i;
}
if (check_no_head_collision(dir_points[i].Item1) && min_food_dist < global_min_food_dist_no_head_collision)
{
min_idx_no_head_collision = i;
global_min_food_dist_no_head_collision = min_food_dist;
}
}
if (dir_points.Length == 0)
{
// No dir_points error
return(new EnvSnake.Action()
{
movementDirection = Direction
});
}
else
{
SnakeDirection dir = dir_points[min_dist_idx].Item2;
if (min_idx_no_head_collision >= 0)
{
dir = dir_points[min_idx_no_head_collision].Item2;
}
// No dir_points error
return(new EnvSnake.Action()
{
movementDirection = dir,
});
}
}
protected override EnvSnake.Action GetAction()
{
SnakeDirection dir = Direction;
if (!Alive)
{
return new EnvSnake.Action()
{
movementDirection = SnakeDirection.Right
}
}
;
int x = this.HeadPosX;
int y = this.HeadPosY;
List <SnakeDirection> dirs = GetPossibleDirections(Direction);
List <SnakeDirection> freeDirs = new List <SnakeDirection>();
float bestWall = 1;
int bestIndex = 0;
for (int i = 0; i < dirs.Count; i++)
{
int xdir, ydir;
DirectionToXY(dirs[i], out xdir, out ydir);
float wall = IsWall(x + xdir, y + ydir);
if (wall == 0)
{
freeDirs.Add(dirs[i]);
}
if (wall < bestWall)
{
bestWall = wall;
bestIndex = i;
}
}
if (freeDirs.Count <= 1)
{
dir = dirs[bestIndex];
}
else
{
//get direction to next food
//add freedom
float bestScore = 999999999;
bestIndex = 0;
for (int i = 0; i < freeDirs.Count; i++)
{
//calculate distance to nearest food
int xdir, ydir;
DirectionToXY(freeDirs[i], out xdir, out ydir);
Vector2 newPos = new Vector2(x + xdir, y + ydir);
float bestDist = 99999999;
List <Point> track = new List <Point>();
track.AddRange(Food);
//track.AddRange(enemies.Select(f => f.Alive ? f.BodyParts[0] : new Point(9999, 9999)));
for (int j = 0; j < track.Count; j++)
{
float border = 4;
float borderWeight = 3f;
float newDist = Math.Abs(track[j].X - newPos.X) + Math.Abs(track[j].Y - newPos.Y);
if (track[j].X < border)
{
newDist += (border - track[j].X) * borderWeight;
}
if (track[j].Y < border)
{
newDist += (border - track[j].Y) * borderWeight;
}
if (track[j].X > GridWidth - border - 1)
{
newDist += (track[j].X - (GridWidth - border - 1)) * borderWeight;
}
if (track[j].Y > GridHeight - border - 1)
{
newDist += (track[j].Y - (GridHeight - border - 1)) * borderWeight;
}
if (newDist < bestDist)
{
bestDist = newDist;
}
}
//calculate freedom
int max = 100;
float count = FloodFillCount(new Point(x + xdir, y + ydir), max);
count *= count;
count *= 1f / (max * max);
if (count >= 1)
{
count = 1;
}
else
{
}
float score = bestDist - count * 10;//2114
if (score < bestScore)
{
bestScore = score;
bestIndex = i;
}
}
dir = freeDirs[bestIndex];
}
return(new EnvSnake.Action()
{
movementDirection = dir,
});
}
void DirectionToXY(SnakeDirection dir, out int xDir, out int yDir)
{
xDir = dir == SnakeDirection.Right ? 1 : dir == SnakeDirection.Left ? -1 : 0;
yDir = dir == SnakeDirection.Down ? 1 : dir == SnakeDirection.Up ? -1 : 0;
}
protected override EnvSnake.Action GetAction()
{
if (!Alive)
{
return new EnvSnake.Action()
{
movementDirection = SnakeDirection.Right
}
}
;
int h = GridHeight;
int w = GridWidth;
int[] choice = null;
switch (Direction)
{
case SnakeDirection.Right:
choice = new int[] { 0, 1, 3 };
break;
case SnakeDirection.Down:
choice = new int[] { 0, 1, 2 };
break;
case SnakeDirection.Left:
choice = new int[] { 1, 2, 3 };
break;
case SnakeDirection.Up:
choice = new int[] { 0, 2, 3 };
break;
}
int r = Env.constRand.Next(3);
SnakeDirection dir = (SnakeDirection)choice[r];
//crash bot or self?
int[] risk = new int[3];
for (int i = 0; i < 3; i++)
{
SnakeDirection dir_temp = (SnakeDirection)choice[i];
int place_temp_x = HeadPosX;
int place_temp_y = HeadPosY;
switch (dir_temp)
{
case SnakeDirection.Right:
place_temp_x += 1;
break;
case SnakeDirection.Down:
place_temp_y += 1;
break;
case SnakeDirection.Left:
place_temp_x -= 1;
break;
case SnakeDirection.Up:
place_temp_y -= 1;
break;
}
if (place_temp_x < 0 || place_temp_y < 0 || place_temp_x >= GridWidth || place_temp_y >= GridHeight)
{
risk[i] += 4;
}
for (int k = 0; k < enemies.Length; k++)
{
if (enemies[k].Alive)
{
for (int j = 0; j < enemies[k].BodyLength - 1; j++)
{
if ((enemies[k].BodyParts[j].X == place_temp_x) & (enemies[k].BodyParts[j].Y == place_temp_y))
{
risk[i] += 2;
}
}
if (Math.Abs(enemies[k].BodyParts[enemies[k].BodyLength - 1].X - place_temp_x) + Math.Abs(enemies[k].BodyParts[enemies[k].BodyLength - 1].Y - place_temp_y) <= 2)
{
if (Math.Abs(enemies[k].BodyParts[enemies[k].BodyLength - 1].X - place_temp_x) + Math.Abs(enemies[k].BodyParts[enemies[k].BodyLength - 1].Y - place_temp_y) <= 1)
{
risk[i] += 2;
}
else
{
risk[i] += 1;
}
}
}
}
if (BodyLength > 4)
{
for (int j = 3; j < BodyLength - 1; j++)
{
{
if ((BodyParts[j].X == place_temp_x) & (BodyParts[j].Y == place_temp_y))
{
risk[i] += 2;
}
}
}
}
}
if (risk.Max() == 0)
{
dir = (SnakeDirection)r;
}
else
{
for (int i = 0; i < 3; i++)
{
if (risk[i] == risk.Min())
{
dir = (SnakeDirection)choice[i];
}
}
}
// crash wall?
//switch (dir)
//{
// case SnakeDirection.Right:
// if (HeadPosX >= w - 3)
// {
// if (HeadPosY <= h - HeadPosY)
// {
// if (choice.Contains(1)) { dir = SnakeDirection.Down; }
// else dir = SnakeDirection.Left;
// }
// else
// {
// if (choice.Contains(3)) { dir = SnakeDirection.Up; }
// else dir = SnakeDirection.Left;
// }
// }
// break;
// case SnakeDirection.Down:
// if (HeadPosY >= h - 3)
// {
// if (HeadPosX <= w - HeadPosX)
// {
// if (choice.Contains(0)) { dir = SnakeDirection.Right; }
// else dir = SnakeDirection.Up;
// }
// else
// {
// if (choice.Contains(2)) { dir = SnakeDirection.Left; }
// else dir = SnakeDirection.Up;
// }
// }
// break;
// case SnakeDirection.Left:
// if (HeadPosX <= 2)
// {
// if (HeadPosY <= h - HeadPosY)
// {
// if (choice.Contains(1)) dir = SnakeDirection.Down;
// else dir = SnakeDirection.Right;
// }
// else
// {
// if (choice.Contains(3)) dir = SnakeDirection.Up;
// else dir = SnakeDirection.Right;
// }
// }
// break;
// case SnakeDirection.Up:
// if (HeadPosY <= 2)
// {
// if (HeadPosX <= w - HeadPosX)
// {
// if (choice.Contains(0)) { dir = SnakeDirection.Right; }
// else dir = SnakeDirection.Down;
// }
// else
// {
// if (choice.Contains(2)) { dir = SnakeDirection.Left; }
// else dir = SnakeDirection.Down;
// }
// }
// break;
//}
return(new EnvSnake.Action()
{
movementDirection = dir,
});
}
