XNA框架游戏开发进阶指南
1. 修改RichBackgroundRenderer类
为了在背景中绘制书籍封面图像并实现向下滚动动画,同时确保渲染效果在页面过渡时不受影响,我们对RichBackgroundRenderer类进行了修改。具体步骤如下:
-添加渲染支持字段:在类的顶部添加以下字段:
GraphicsDevice graphicsDevice; SpriteBatch spriteBatch; //book graphic fields Texture2D bookTexture; Vector2 bookPosition; Vector2 bookVelocity;- 修改Update和Draw方法:实现渲染和简单动画,代码如下:
public void Update(TimeSpan elapsedTime, TimeSpan totalTime) { //Rich background content game loop update code goes here bookPosition += bookVelocity; if (bookPosition.Y > 800d) { bookPosition.X = graphicsDevice.Viewport.Width / 2 - bookTexture.Width / 2; bookPosit