Question

在这里，我想在没有用户输入的情况下使用计时器移动这个动画矩形，也许？动画矩形应左右移动（从起点到终点，整个路径= 315像素）。我的意思是点1（从左侧开始）和点2（右侧结束）之间的315像素。这是我的代码：变量：

        //Sprite Texture
        Texture2D texture;
        //A Timer variable
        float timer = 0f;
        //The interval (300 milliseconds)
        float interval = 300f;
        //Current frame holder (start at 1)
        int currentFrame = 1;
        //Width of a single sprite image, not the whole Sprite Sheet
        int spriteWidth = 32;
        //Height of a single sprite image, not the whole Sprite Sheet
        int spriteHeight = 32;
        //A rectangle to store which 'frame' is currently being shown
        Rectangle sourceRect;
        //The centre of the current 'frame'
        Vector2 origin;

接下来，在LoadContent()方法中：

       //Texture load
       texture = Content.Load<Texture2D>("gameGraphics\\Enemies\\Sprite");

Update()方法：

    //Increase the timer by the number of milliseconds since update was last called
    timer += (float)gameTime.ElapsedGameTime.TotalMilliseconds;
    //Check the timer is more than the chosen interval
    if (timer > interval)
    {
        //Show the next frame
        currentFrame++;
        //Reset the timer
        timer = 0f;
    }
    //If we are on the last frame, reset back to the one before the first frame (because currentframe++ is called next so the next frame will be 1!)
    currentFrame = currentFrame % 2;
    sourceRect = new Rectangle(currentFrame * spriteWidth, 0, spriteWidth, spriteHeight);
    origin = new Vector2(sourceRect.Width / 2, sourceRect.Height / 2);

最后，Draw()方法：

    //Texture Draw
    spriteBatch.Draw(texture, new Vector2(263, 554), sourceRect,Color.White, 0f, origin, 1.0f, SpriteEffects.None, 0);

所以我想移动sourceRect。 Ir必须左右循环。

Answer 1

您的spriteBatch.Draw()来电一直使用destinationRectangle的相同值。你想怎么搬家？例如，每帧的右边5个像素？只需将您的destinationRectangle（第二个参数更改为spriteBatch.Draw()）更改为：

new Vector2(263 + (currentFrame * 5), 554);

编辑：评论请求的示例

class Foo
{
    int x;
    int maxX = 400;

    void Update(GameTime gameTime)
    {
        if (x++ >= maxX)
            x = 263;
    }

    void Draw()
    {
        spriteBatch.Draw(texture, new Vector2(263 + x, 554), sourceRect,Color.White, 0f, origin, 1.0f, SpriteEffects.None, 0);
    }
}

当然，除了spriteBatch.Draw（）调用之外，您将保留所有当前代码;你只需添加x部分。

XNA - 水平移动动画矩形（无用户输入，但定时器）

1 个答案: