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我是新来的编程新手。我一直在寻找一段时间，但我找不到任何可以帮助解决这个问题的东西。

我试图让我的 spritesheet 在我的 spritesheet 的不同行走框架中循环，我用 IsKeyDown 轻松完成了它，但是当谈到使用鼠标走到某个地方时，我花了一段时间才找到一个“坏”的解决方案：

if (destination.X > position.X)                
                currentFrame.Y = 6;
            if (destination.X > position.X && destination.Y >= position.Y + 35)
                currentFrame.Y = 7;
            if (destination.X > position.X && destination.Y <= position.Y - 35)
                currentFrame.Y = 5;

它有点工作，但想知道是否有更好的解决方法。我想要的是能够点击游戏屏幕并选择适当的精灵行，相对于精灵的当前位置和目的地，使其以正确的方式进行动画处理。

抱歉，如果之前有人问过这个问题，但我在发布之前搜索了几个小时，但一无所获。

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2 回答 2

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我有点不清楚你在做什么。您是否只有 2 个精灵，一个用于左侧，一个用于右侧？这就是我在您当前的代码中看到的全部内容，但您指的是动画。我将假设您有一套完整的精灵来动画行走，在这种情况下，我认为本教程将涵盖您需要的内容：

http://coderplex.blogspot.ca/2010/04/2d-animation-part-1-basics.html

（更具体地说，本教程的第 4 部分：http: //coderplex.blogspot.ca/2010/04/2d-animation-part-4-sprite-animation.html）

基本上，您将需要设置计时器来控制精灵动画，因为对于这种类型的鼠标移动，在您单击鼠标和对象到达目的地之间没有更多的输入（与移动相关）。因此，您需要使用计时器来确定何时应该调用行走动画中的下一个精灵。

或者，您可以进一步详细说明您的 if 语句（如果 currentFrame = 1 则 currentFrame = 2，如果 currentFrame = 2 则 currentFrame = 3 等），但如果您对图形进行更改，将会变得混乱且难以维护或精灵从精灵表中拉出的方式。它也很可能动画太快，无论如何您都必须使用计时器来减慢它的速度。

于 2013-01-29T15:41:42.693 回答
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想通了，我想。这是我的代码（希望它的格式正确。对不起，如果我不打算回答我自己的问题，认为这可能对其他人有帮助）：

public Vector2 position = new Vector2(200, 200);
    Point frameSize = new Point(48, 92);
    Point currentFrame = new Point(0, 0);
    Point sheetSize = new Point(9, 8);
    float speed = 10;
    Vector2 direction;
    Vector2 destination;
    bool mousePressed = false;
    float difference;


    KeyboardState currentState;
    KeyboardState theKeyboardState;
    KeyboardState oldKeyboardState;

    enum State
    {
        Walking
    }

    State mcurrentState = State.Walking;

    TimeSpan nextFrameInterval =
        TimeSpan.FromSeconds((float)1 / 16);
    TimeSpan nextFrame;
    MouseState mouseState;
    MouseState oldState;

    public void Move()
    {
        direction = destination - position;
        direction.Normalize();
        position += direction * speed;

        float Xdistance = destination.X - position.X;
        float Ydistance = destination.Y - position.Y;

        difference = (float)Math.Atan2(Ydistance, Xdistance);

        float differ;
        differ = MathHelper.ToDegrees(difference);

        if (destination.X >= position.X || destination.X <= position.X)
        {                
            currentFrame.X++;
            if (currentFrame.X >= 9)
                currentFrame.X = 0;

            //down = 90dg
            if (differ >= 67.6 && differ <= 112.5)
                currentFrame.Y = 0;
            if (differ >= 112.6 && differ <= 157.5)
                currentFrame.Y = 1;
            if (differ >= 157.6 && differ <= 180 || differ >= -180 && differ <= -157.5)
                currentFrame.Y = 2;
            if (differ >= -157.4 && differ <= -112.5)
                currentFrame.Y = 3;
            if (differ >= -112.4 && differ <= -67.5)
                currentFrame.Y = 4;
            if (differ >= -67.4 && differ <= -22.5)
                currentFrame.Y = 5;
            if (differ >= -22.4 && differ <= 22.5)
                currentFrame.Y = 6;
            if (differ >= 22.6 && differ <= 67.5)
                currentFrame.Y = 7;
        }
    }

    public void Update()
    {
        mouseState = Mouse.GetState();
        currentState = Keyboard.GetState();
        theKeyboardState = Keyboard.GetState();

        if (mousePressed == true)
        {
            if (Vector2.DistanceSquared(destination, position) >= speed * speed)
            {
                Move();
            }
        }

        if (mouseState.LeftButton == ButtonState.Pressed && oldState.LeftButton == ButtonState.Released)
        {
            int mouseY = mouseState.Y;
            int mouseX = mouseState.X;

            destination = new Vector2(mouseX, mouseY);
            mousePressed = true;
        }

        oldState = mouseState;           

        if (mcurrentState == State.Walking)
        {
            #region KB animation

            if (currentState.IsKeyDown(Keys.Down))
            {
                mousePressed = false;
                currentFrame.X++;
                currentFrame.Y = 0;
                if (currentFrame.X >= 9)
                    currentFrame.X = 0;
                position.Y += speed;
            }

            if (currentState.IsKeyDown(Keys.Up))
            {
                mousePressed = false;
                currentFrame.X++;
                currentFrame.Y = 4;
                if (currentFrame.X >= 9)
                    currentFrame.X = 0;
                position.Y -= speed;
            }

            if (currentState.IsKeyDown(Keys.Right))
            {
                mousePressed = false;
                currentFrame.X++;
                currentFrame.Y = 6;
                if (currentState.IsKeyDown(Keys.Down))
                    currentFrame.Y = 7;
                if (currentState.IsKeyDown(Keys.Up))
                    currentFrame.Y = 5;
                if (currentFrame.X >= 9)
                    currentFrame.X = 0;
                position.X += speed;
            }

            if (currentState.IsKeyDown(Keys.Left))
            {
                mousePressed = false;
                currentFrame.X++;
                currentFrame.Y = 2;
                if (currentState.IsKeyDown(Keys.Down))
                    currentFrame.Y = 1;
                if (currentState.IsKeyDown(Keys.Up))
                    currentFrame.Y = 3;
                if (currentFrame.X >= 9)
                    currentFrame.X = 0;
                position.X -= speed;
            }
        }
        oldKeyboardState = theKeyboardState;
            #endregion

    }

    public void Draw(SpriteBatch spriteBatch, Texture2D character)
    {
        spriteBatch.Begin();

        spriteBatch.Draw(character, position, new Rectangle(frameSize.X * currentFrame.X,
            frameSize.Y * currentFrame.Y, frameSize.X, frameSize.Y), Color.White, 0, new Vector2(frameSize.X / 2, frameSize.Y / 2), 1, SpriteEffects.None, 0);

        spriteBatch.End();
    }
于 2013-01-29T23:57:42.800 回答