0 
public void render(float delta) {
    Gdx.gl.glClearColor(0, 0, 0.2f, 1);
    Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);

    stage.act(delta);

    batch.setProjectionMatrix(camera.combined);
    batch.begin();
    if (lifeCount > 0) {
        /* 
        When stage.draw is called here, it only displays the exit button.
        The game still operates, but everything is invisible.
        If I leave the game on, the game over screen is shown,
        */
        stage.draw();
        text.setColor(1.0f, 1.0f, 1.0f, 1.0f);
        text.draw(batch, score + scoreCount, 25, 100);
        text.draw(batch, lives + lifeCount, 25, 120);
        text.draw(batch, speed + raindropSpeed, 25, 80);
        batch.draw(bucketTexture, bucket.x, bucket.y);
        for (Rectangle clearDrop : clearDrops) {
            batch.draw(clearDropTexture, clearDrop.x, clearDrop.y);
        }
        for (Rectangle healthDrop : healthDrops) {
            batch.draw(healthDropTexture, healthDrop.x, healthDrop.y);
            /* 
             If I place stage.draw here, health drops are invisible.
             This also happens if I place it in the raindrop for-loop and the 
             cleardrop for-loop
            */ 
        }
        for (Rectangle raindrop : raindrops) {
            batch.draw(raindropTexture, raindrop.x, raindrop.y);
        }
        /*
         If I place stage.draw here, the bucket, score, life, and speed
         display correctly. The drops are still invisible.
         */
    } else {
        pause();
        raindrops.clear();  
        game.setScreen(new GameOver(game));
    }
    batch.end();

我一直在尝试做的是在 GameScreen 的右上角有一个退出按钮，尽管绘制按钮所在的舞台给我带来了困难（请参阅代码中的注释）。

这是我的退出按钮和阶段代码（resize()）：

if (stage == null)
        stage = new Stage(width, height, true);
    stage.clear();

    Gdx.input.setInputProcessor(stage);

    TextButtonStyle styleQuit = new TextButtonStyle();
    styleQuit.up = skin.getDrawable("buttonnormal");
    styleQuit.down = skin.getDrawable("buttonpressed");
    styleQuit.font = text;

    quitButton = new TextButton(" ", styleQuit);
    quitButton.setWidth(128);
    quitButton.setHeight(128);
    quitButton.setX(800 - 128);
    quitButton.setY(480 - 100);

    quitButton.addListener(new InputListener() {
        public boolean touchDown(InputEvent event, float x, float y,
                        int pointer, int button) {
                return true;
        }

        public void touchUp(InputEvent event, float x, float y,
                        int pointer, int button) {
            Gdx.app.log(RainCatcher.LOG, "Quit Button Pressed");
            game.setScreen(new MainMenu(game));
        }
    });

    stage.addActor(quitButton);

其余的（在 show() 中）

    atlas = new TextureAtlas("gamebuttons.pack");
    skin = new Skin();
    skin.addRegions(atlas);
    text = new BitmapFont();

有什么特别的技巧可以让舞台与落下的雨滴、水桶和文字一起渲染吗？我和我的朋友都被难住了，无法在任何地方找到解决方案。

4

2 回答 2

0

在 batch.end() 之后或 batch.begin() 之前移动 stage.draw()

于 2013-08-15T05:41:43.827 回答
0

在我看来，这不是您采取的正确方法。如果您在 libgdx 中使用舞台，那么您应该受益于 Scene2d 的其他组件。因此，与其单独绘制雨滴和其他游戏实体（并使您的工作变得复杂），不如让它们成为演员并将它们添加到您需要的任何地方，然后在渲染中绘制舞台。

例如：

   public class RaindDrop extends Actor {
    TextureRegion region;

    public RaindDrop () {
            region = new TextureRegion(...);
    }

    public void draw (SpriteBatch batch, float parentAlpha) {
            Color color = getColor();
            batch.setColor(color.r, color.g, color.b, color.a * parentAlpha);
            batch.draw(...);
    }
  }

其他实体也是如此。初始化并将它们添加到您的阶段。

这是官方 wiki 以了解更多信息：

https://code.google.com/p/libgdx/wiki/scene2d

于 2013-08-15T06:12:02.787 回答