XNA没有画出我告诉它的内容

时间:2012-05-13 02:22:16

标签: c# xna drawing sprite xna-4.0

我有这个代码应该向窗口绘制两个卷图标,但它不起作用。以下是相关代码:

    Texture2D vol_max;
    Vector2 vol_max_vect;
    Texture2D vol_min;
    Vector2 vol_min_vect;
    ...
    protected override void LoadContent()
    {
        // Create a new SpriteBatch, which can be used to draw textures.
        spriteBatch = new SpriteBatch(GraphicsDevice);

        vol_max = Content.Load<Texture2D>("vol_max@16");
        vol_min = Content.Load<Texture2D>("vol_min@16");
    }
    protected override void Update(GameTime gameTime)
    {
        thisKeyboard = Keyboard.GetState(PlayerIndex.One);

        if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed ||
            thisKeyboard.IsKeyDown(Keys.Escape))
        {
            this.Exit();
        }

        // Update window vectors
        vol_max_vect = new Vector2(
            (float)(Window.ClientBounds.Right - 20),
            (float)(Window.ClientBounds.Bottom - 20));
        vol_min_vect = new Vector2(
            (float)(Window.ClientBounds.Right - 140),
            (float)(Window.ClientBounds.Bottom - 20));

        prevKeyboard = thisKeyboard;

        base.Update(gameTime);
    }

    protected override void Draw(GameTime gameTime)
    {
        GraphicsDevice.Clear(Color.CornflowerBlue);

        spriteBatch.Begin();
        spriteBatch.Draw(
            vol_max,
            vol_max_vect,
            Color.White);
        spriteBatch.Draw(
            vol_min,
            vol_min_vect,
            Color.White);
        spriteBatch.End();

        base.Draw(gameTime);
    }

1 个答案:

答案 0 :(得分:2)

问题是ClientBounds.Right / Bottom在Windows屏幕坐标中(其中[0,0]是屏幕的左上角,右下角是你的分辨率,例如[1024,768])。

你真正想要的是在你自己的窗口右下角绘制它们。 XNA的SpriteBatch绘制视口坐标,其中[0,0]是视口的左上角,右下角是应用程序的分辨率,例如。 [800,480]。要获得该宽度,您只需使用Window.ClientBounds.Width而不是Window.ClientBounds.Right,而使用Window.ClientBounds.Height而不是Window.ClientBounds.Bottom。

希望这有帮助!