C#/XNA 如何让我的班级互相“交流”？

Question

我正在尝试构建超级马里奥兄弟第一关的克隆，但我在让我的班级互相“交流”时遇到了一些麻烦。到目前为止，我有两个控制器类（键盘、游戏手柄）和两个动画精灵类（RunMarioSprite、DeadMarioSprite）。我想要做的是根据用户的键盘/游戏板输入在屏幕上显示的这两个精灵之间切换。如果按下 F 键，马里奥应该会显示为向右运行。如果按下 D 键，马里奥应该上下移动。

通过我的控制器类更改在屏幕上绘制的动画精灵类的正确方法是什么？

键盘类

public class KeyboardController : IController
{
    KeyboardState keyboard = Keyboard.GetState();
    private IAnimatedSprite marioSprite;
    Texture2D texture;

    public void Update()
    {
        if (keyboard.IsKeyDown(Keys.Q))
        {
            // QUIT GAME    
        }
        if (keyboard.IsKeyDown(Keys.F))
        {
            // MARIO RUN RIGHT             
        }
        if (keyboard.IsKeyDown(Keys.D))
        {
            // DEAD MARIO UP DOWN

        }
    }
}

动画精灵类的示例

public class RunMarioSprite : IAnimatedSprite
{
    public Texture2D Texture { get; set; }
    private int currentFrame = 0;
    private int totalFrames = 4;
    public int frameShift = 30;

    public RunMarioSprite(Texture2D texture)
    {
        currentFrame = 0;
        this.Texture = texture;
    }

    public void Update()
    {
        currentFrame++;
        if (currentFrame == totalFrames)
            currentFrame = 0;
    }

    public void Draw(SpriteBatch spriteBatch)
    {

        Rectangle sourceRectangle2 = new Rectangle((240 +(currentFrame*frameShift)), 0, 30, 30);
        Rectangle destinationRectangle2 = new Rectangle(100, 100, 30, 30);

        spriteBatch.Begin();
        spriteBatch.Draw(Texture, destinationRectangle2, sourceRectangle2, Color.White);
        spriteBatch.End();
    }
}


    protected override void Update(GameTime gameTime)
    {
        // Allows the game to exit
        if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
            this.Exit();


        // TODO: Add your update logic here
      foreach (IController Controller in ControllerList)
        {
           Controller.Update();
        }

        marioSprite.Update();
        base.Update(gameTime);
    }

    /// <summary>
    /// This is called when the game should draw itself.
    /// </summary>
    /// <param name="gameTime">Provides a snapshot of timing values.</param>
    protected override void Draw(GameTime gameTime)
    {
        GraphicsDevice.Clear(Color.CornflowerBlue);

        // TODO: Add your drawing code here
        marioSprite.Draw(this.spriteBatch);

        base.Draw(gameTime);
    }

主要（更新和绘制）

    protected override void Update(GameTime gameTime)
    {
        // Allows the game to exit
        if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
            this.Exit();


        // TODO: Add your update logic here
      foreach (IController Controller in ControllerList)
        {
           Controller.Update();
        }

        marioSprite.Update();
        base.Update(gameTime);
    }

    /// <summary>
    /// This is called when the game should draw itself.
    /// </summary>
    /// <param name="gameTime">Provides a snapshot of timing values.</param>
    protected override void Draw(GameTime gameTime)
    {
        GraphicsDevice.Clear(Color.CornflowerBlue);

        // TODO: Add your drawing code here
        marioSprite.Draw(this.spriteBatch);

        base.Draw(gameTime);
    }

如果问题格式不正确，我深表歉意。感谢您的帮助！

Answer 1

您需要在精灵管理器类中处理您的KeyboardController，其目的是在屏幕上绘制您的整个关卡。可能你不需要KeyboardController，而只需要KeyboardState：

KeyboardController keyboardController = new KeyboardController();

public void Update()
{
   // you should implement a method like this
   KeyboardState keyboard = keyboardController.GetKeyboardState();

   if (keyboard.IsKeyDown(Keys.F))
   {
      //change marioSprite instance         
   }
   if (keyboard.IsKeyDown(Keys.D))
   {
      //change marioSprite instance
   }
 }

Answer 2

如果您要求的是一种基于另一个类中的键盘输入来知道在 Main.Draw() 方法中绘制哪个精灵的方法，您可以尝试这样的方法：

public class Main
{
    public static bool DrawAliveMario;
    RunMarioSprite runmariosprite;
    DeadMarioSprite deadmariosprite;

    protected override void Draw(GameTime gameTime)
    {
        //...

        // TODO: Add your drawing code here
        if (DrawAliveMario) runmariosprite.Draw(this.spriteBatch);
        else deadmariosprite.Draw(this.spriteBatch);

        base.Draw(gameTime);
    }

}

然后你可以在你的控制器类中：

public class KeyboardController : IController
{
    KeyboardState keyboard = Keyboard.GetState();

    public void Update()
    {
        if (keyboard.IsKeyDown(Keys.Q))
        {
            // QUIT GAME    
        }
        if (keyboard.IsKeyDown(Keys.F))
        {
            Main.DrawAliveMario = true;           
        }
        if (keyboard.IsKeyDown(Keys.D))
        {
            Main.DrawAliveMario = false;

        }
    }
}

希望这会有所帮助。