Question

我正在制作 Pokemon like 游戏，我需要让我的Sprite像Pokemon的游戏一样移动。我的意思是， tile to tile ，cell to cell。我正在使用 tIDE （图块地图编辑器），我的图块宽度 32px 。我希望播放器移动32px每32px 并在移动过程中播放动画。正如口袋妖怪一样。因此，如果我按住一个键，玩家会不断移动，如果我按一次键，他只需移动一次32px。

这是我目前的移动功能：

public void movePlayer(String keyDown, GameTime gameTime)
    {
        if (keyDown == "up")
        {
            playerPosition.Y -= 2;

            //Animation part, with a timer to switch animation
            if (time > 0)
            {
                directionSprite = directionSpriteTab[4];
                time -= gameTime.ElapsedGameTime.Milliseconds;
                time2 = interval;
            }
            if (time2 > 0 && time <= 0)
            {
                directionSprite = directionSpriteTab[5];
                time2 -= gameTime.ElapsedGameTime.Milliseconds;
            }
            if (time2 <= 0 && time <= 0)
            {
                time = interval;
            }
        }
        //same for other keys ...
        }

使用该代码我的播放器移动顺畅，但是当我停止按下一个键时，他在两个Tiles之间停止并且它真的很烦人的碰撞，例如当我想进入一个房子时，门是32px大而且很难制作玩家进入。

Answer 1

你可以添加布尔变量或枚举来保持玩家移动的状态（枚举可能更好但是为了简单起见，我将在示例中使用bool）。例如

bool movingUp = false; // Set to true when keyDown == "up".

然后您可以使用if语句检查播放器是否位于下一个磁贴的坐标处。如果他不是，继续更新playerPosition.Y。像这样的东西

 if (keyDown == "up")
 {
     movingUp = true;
     // Could be type Vector2 or something else, depends on what playerPosition is.
     playerMoveDestination = new Point(playerPosition.X, playerPosition.Y - 32);
 }

 if (movingUp)
 {
     // Calculates the distance from the destination tile.
     // When the distance is small enough you want to snap to the tile to avoid 
     // overshooting. In this case the snap distance is less than 2 pixels because the 
     // character moves 2 pixels per frame.
     if (playerPosition.Y - playerMoveDestination.Y < 2)
     {
         playerPosition.Y = playerMoveDestination.Y;
         movingUp = false;
     }
     else
     {
         playerPosition.Y -= 2;

         if (time > 0)
         {
             directionSprite = directionSpriteTab[4];
             time -= gameTime.ElapsedGameTime.Milliseconds;
             time2 = interval;
         }
         if (time2 > 0 && time <= 0)
         {
             directionSprite = directionSpriteTab[5];
             time2 -= gameTime.ElapsedGameTime.Milliseconds;
         }
         if (time2 <= 0 && time <= 0)
         {
             time = interval;
         }
     }
 }

现在，如果玩家放开了向上键，它将继续移动角色，直到它到达下一个图块。

编辑：抱歉，我的代码中有错误。当玩家正好在一个牌上时，playerPosition.Y％32评估为0，小于2，所以当按下向上键时会立即执行并停止移动。要解决此问题，您可以使用playerMoveDestination变量，当玩家按下向上键时，它会设置为（playerPosition.X，playerPosition.Y - 32）。我更改了代码来执行此操作。

Answer 2

现在Sprite正常移动但没有Tile to Tile ......如果我释放他停止的键并且没有继续向方向区块移动，他会像以前一样移动。

当我添加“向下”键部分时，它会产生奇怪的动作x）

这是带有“向下”的代码你能看出我做错了吗？

    public void movePlayer(String keyDown, GameTime gameTime)
    {
        if (keyDown == "up")
        {
            movingUp = true;
            // Could be type Vector2 or something else, depends on what playerPosition is.
            playerMoveDestination = new Vector2(playerPosition.X, playerPosition.Y - 32);
        }

        if (movingUp)
        {
            // Calculates the distance from the destination tile.
            // When the distance is small enough you want to snap to the tile to avoid 
            // overshooting. In this case the snap distance is 2 or less pixels because the 
            // character moves 2 pixels per frame.
            if (playerPosition.Y - playerMoveDestination.Y < 2)
            {
                playerPosition.Y = playerMoveDestination.Y;
                movingUp = false;
            }
            else
            {
                playerPosition.Y -= 2;
            }
        }

        if (keyDown == "down")
        {
            movingDown = true;
            // Could be type Vector2 or something else, depends on what playerPosition is.
            playerMoveDestination = new Vector2(playerPosition.X, playerPosition.Y + 32);
        }
        if (movingDown)
        {
            // Calculates the distance from the destination tile.
            // When the distance is small enough you want to snap to the tile to avoid 
            // overshooting. In this case the snap distance is 2 or less pixels because the 
            // character moves 2 pixels per frame.
            if (playerPosition.Y + playerMoveDestination.Y < 2)
            {
                playerPosition.Y = playerMoveDestination.Y;
                movingDown = false;
            }
            else
            {
                playerPosition.Y += 2;
            }
        }
    }

我初始化了“playerMoveDestination”和movingDown / Up bool：

    bool movingUp = false; // Set to true when keyDown == "up".
    bool movingDown = false;

    Vector2 playerMoveDestination;

我将它们放在“movePlayer”功能之上。

再次感谢您的帮助！

如何制作像口袋妖怪一样的旧学校雪碧运动（Tile to Tile）

2 个答案: