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我和我的朋友决定为自己制作一款游戏。它采用口袋妖怪和旧的 Harvest Moon 图形风格。我一直在用动画做一些测试，我让它工作了。我的播放器 Sprite Sheet 有八个图像（每个方向 2 个）。

但是，当我按住向上箭头键和向左或向右或向下箭头键和向左或向右时，它试图同时执行两个动画。我知道必须有办法解决这个问题，我只需要有人告诉我怎么做。

这是我为我的播放器设置的动画类：

public class Animation
{
    Texture2D texture;
    Rectangle rectangle;
    public Vector2 position;
    Vector2 origin;
    Vector2 velocity;

    int currentFrame;
    int frameHeight;
    int frameWidth;

    float timer;
    float interval = 75;

    public Animation(Texture2D newTexture, Vector2 newPosition, int newFrameHeight, int newFrameWidth)
    {
        texture = newTexture;
        position = newPosition;
        frameWidth = newFrameWidth;
        frameHeight = newFrameHeight;
    }

    public void Update(GameTime gameTime)
    {
        rectangle = new Rectangle(currentFrame * frameWidth, 0, frameWidth, frameHeight);
        origin = new Vector2(rectangle.Width / 2, rectangle.Height / 2);
        position = position + velocity;

        // Comment Out For Camera!!!!
        if (position.X <= 0 + 10) position.X = 0 + 10;
        if (position.X >= 1920 - rectangle.Width + 5) position.X = 1920 - rectangle.Width + 5;
        if (position.Y <= 0 + 10) position.Y = 0 + 10;
        if (position.Y >= 1080 - rectangle.Height + 7) position.Y = 1080 - rectangle.Height + 7;

        if (Keyboard.GetState().IsKeyDown(Keys.Right))
        {
            AnimateRight(gameTime);
            velocity.X = 2;
        }
        else if (Keyboard.GetState().IsKeyDown(Keys.Left))
        {
            AnimateLeft(gameTime);
            velocity.X = -2;
        }
        else velocity = Vector2.Zero;

        if (Keyboard.GetState().IsKeyDown(Keys.Up))
        {
            AnimateUp(gameTime);
            velocity.Y = -2;
        }
        if (Keyboard.GetState().IsKeyDown(Keys.Down))
        {
            AnimateDown(gameTime);
            velocity.Y = 2;
        }
    }

    public void AnimateRight(GameTime gameTime)
    {
            timer += (float)gameTime.ElapsedGameTime.TotalMilliseconds / 2;
            if (timer > interval)
            {
                currentFrame++;
                timer = 0;
                if (currentFrame > 1)
                    currentFrame = 0;
            }
    }

    public void AnimateLeft(GameTime gameTime)
    {
            timer += (float)gameTime.ElapsedGameTime.TotalMilliseconds / 2;
            if (timer > interval)
            {
                currentFrame++;
                timer = 0;
                if (currentFrame > 3 || currentFrame < 2)
                    currentFrame = 2;
            }
    }

    public void AnimateUp(GameTime gameTime)
    {
            timer += (float)gameTime.ElapsedGameTime.TotalMilliseconds / 2;
            if (timer > interval)
            {
                currentFrame++;
                timer = 0;
                if (currentFrame > 5 || currentFrame < 4)
                    currentFrame = 4;
            }
    }

    public void AnimateDown(GameTime gameTime)
    {
            timer += (float)gameTime.ElapsedGameTime.TotalMilliseconds / 2;
            if (timer > interval)
            {
                currentFrame++;
                timer = 0;
                if (currentFrame > 7 || currentFrame < 6)
                    currentFrame = 6;
            }
    }

    public void Draw(SpriteBatch spriteBatch)
    {
        spriteBatch.Draw(texture, position, rectangle, Color.White, 0f, origin, 1.0f, SpriteEffects.None, 0);
    }
}
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2 回答 2

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这将允许一次仅向一个方向移动（我相信如果您遵循口袋妖怪的游戏风格，这就是您想要的）：

    if (Keyboard.GetState().IsKeyDown(Keys.Right))
    {
        AnimateRight(gameTime);
        velocity.X = 2;
    }
    else if (Keyboard.GetState().IsKeyDown(Keys.Left))
    {
        AnimateLeft(gameTime);
        velocity.X = -2;
    }       
    else if (Keyboard.GetState().IsKeyDown(Keys.Up))
    {
        AnimateUp(gameTime);
        velocity.Y = -2;
    }
    else if (Keyboard.GetState().IsKeyDown(Keys.Down))
    {
        AnimateDown(gameTime);
        velocity.Y = 2;
    }
    else velocity = Vector2.Zero;

如果您想一次移动两个方向，例如：

    bool animated = false;
    if (Keyboard.GetState().IsKeyDown(Keys.Right))
    {
        AnimateRight(gameTime);
        velocity.X = 2;
        animated = true;
    }
    else if (Keyboard.GetState().IsKeyDown(Keys.Left))
    {
        AnimateLeft(gameTime);
        velocity.X = -2;
        animated = true;
    }    
    else
    {
         velocity.X = 0;
    }  

    if (Keyboard.GetState().IsKeyDown(Keys.Up))
    {
        if(animated == false)
        {   AnimateUp(gameTime); }

        velocity.Y = -2;
    }
    else if (Keyboard.GetState().IsKeyDown(Keys.Down))
    {
        if(animated == false)
        { AnimateDown(gameTime); }
        velocity.Y = 2;
    }
    else velocity.Y = 0;
于 2013-04-12T15:16:37.620 回答
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我知道这有点老了，但是在这种情况下，如果同时按下两个键，玩家无法控制的顺序优先级会影响他将移动的方向。更好的解决方案是：

velocity = Vector2.Zero;

if (Keyboard.GetState().IsKeyDown(Keys.Right))
    velocity.X += 2;
if (Keyboard.GetState().IsKeyDown(Keys.Left))
    velocity.X -= 2;

if (Keyboard.GetState().IsKeyDown(Keys.Up))
    velocity.Y -= 2;
if (Keyboard.GetState().IsKeyDown(Keys.Down))
    velocity.Y += 2;

if (velocity.X > 0)
    AnimateRight(gameTime);
else if (velocity.X < 0)
    AnimateLeft(gameTime);

// Animate Up/Down only if Left/Right does not... 
// not sure if needed but will follow the style.
if (velocity.X == 0) 
{
    if (velocity.Y > 0)
        AnimateDown(gameTime);
    else if (velocity.Y < 0)
        AnimateUp(gameTime);
}

这样，我们将输入和逻辑分开，这使事情变得更加清晰，并且我们不会优先考虑某些输入（xept for up/down ...但是w/e）如果玩家尝试向左和向右同时，运动将被取消。

于 2014-06-25T19:02:10.937 回答