libGDX – 添加分数并将其显示在屏幕的左上角？

以下是libGDX中简单游戏的示例代码。 当雨滴落入水桶时，分数应增加1。 总分应显示在左上角。

如果错过3滴而不是显示GAME OVER。 我知道要增加分数，但我不知道要显示它。 谢谢。

public class Drop implements ApplicationListener { Texture dropImage; Texture bucketImage; Sound dropSound; Music rainMusic; SpriteBatch batch; OrthographicCamera camera; Rectangle bucket; Array raindrops; long lastDropTime; @Override public void create() { // load the images for the droplet and the bucket, 64x64 pixels each dropImage = new Texture(Gdx.files.internal("droplet.png")); bucketImage = new Texture(Gdx.files.internal("bucket.png")); // load the drop sound effect and the rain background "music" dropSound = Gdx.audio.newSound(Gdx.files.internal("drop.wav")); rainMusic = Gdx.audio.newMusic(Gdx.files.internal("rain.mp3")); // start the playback of the background music immediately rainMusic.setLooping(true); rainMusic.play(); // create the camera and the SpriteBatch camera = new OrthographicCamera(); camera.setToOrtho(false, 800, 480); batch = new SpriteBatch(); // create a Rectangle to logically represent the bucket bucket = new Rectangle(); bucket.x = 800 / 2 - 64 / 2; // center the bucket horizontally bucket.y = 20; // bottom left corner of the bucket is 20 pixels above the bottom screen edge bucket.width = 64; bucket.height = 64; // create the raindrops array and spawn the first raindrop raindrops = new Array(); spawnRaindrop(); } private void spawnRaindrop() { Rectangle raindrop = new Rectangle(); raindrop.x = MathUtils.random(0, 800-64); raindrop.y = 480; raindrop.width = 64; raindrop.height = 64; raindrops.add(raindrop); lastDropTime = TimeUtils.nanoTime(); } @Override public void render() { // clear the screen with a dark blue color. The // arguments to glClearColor are the red, green // blue and alpha component in the range [0,1] // of the color to be used to clear the screen. Gdx.gl.glClearColor(0, 0, 0.2f, 1); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); // tell the camera to update its matrices. camera.update(); // tell the SpriteBatch to render in the // coordinate system specified by the camera. batch.setProjectionMatrix(camera.combined); // begin a new batch and draw the bucket and // all drops batch.begin(); batch.draw(bucketImage, bucket.x, bucket.y); for(Rectangle raindrop: raindrops) { batch.draw(dropImage, raindrop.x, raindrop.y); } batch.end(); // process user input if(Gdx.input.isTouched()) { Vector3 touchPos = new Vector3(); touchPos.set(Gdx.input.getX(), Gdx.input.getY(), 0); camera.unproject(touchPos); bucket.x = touchPos.x - 64 / 2; } if(Gdx.input.isKeyPressed(Keys.LEFT)) bucket.x -= 200 * Gdx.graphics.getDeltaTime(); if(Gdx.input.isKeyPressed(Keys.RIGHT)) bucket.x += 200 * Gdx.graphics.getDeltaTime(); // make sure the bucket stays within the screen bounds if(bucket.x  800 - 64) bucket.x = 800 - 64; // check if we need to create a new raindrop if(TimeUtils.nanoTime() - lastDropTime > 1000000000) spawnRaindrop(); // move the raindrops, remove any that are beneath the bottom edge of // the screen or that hit the bucket. In the later case we play back // a sound effect as well. Iterator iter = raindrops.iterator(); while(iter.hasNext()) { Rectangle raindrop = iter.next(); raindrop.y -= 200 * Gdx.graphics.getDeltaTime(); if(raindrop.y + 64 < 0) iter.remove(); if(raindrop.overlaps(bucket)) { dropSound.play(); iter.remove(); } } } @Override public void dispose() { // dispose of all the native resources dropImage.dispose(); bucketImage.dispose(); dropSound.dispose(); rainMusic.dispose(); batch.dispose(); } @Override public void resize(int width, int height) { } @Override public void pause() { } @Override public void resume() { } } 

Answer 1

这是一个libGDX用户wiki的链接，当我遇到Pong翻拍的相同问题时，我发现它很有帮助。

要显示分数，您需要的工具是：用于保持分数的int变量，用于帮助显示分数的String或CharacterSequence变量（我将使用String），以及用于显示字体类型的BitmapFont。

第一步：声明所有这些工具。

 private int score; private String yourScoreName; BitmapFont yourBitmapFontName; 

第二步：在create方法中初始化它们

 public void create() score = 0; yourScoreName = "score: 0"; yourBitmapFontName = new BitmapFont(); 

第三步：增加得分变量并在碰撞逻辑方法中更改yourScoreName字符串变量（当雨滴与桶重叠时）。

 if(raindrop.overlaps(bucket)) { score++; yourScoreName = "score: " + score; dropSound.play(); iter.remove(); 

第四步：在render（）方法中，设置字体的颜色，并在spriteBatch.begin和spriteBatch.end之间调用BitmapFont上的draw方法。

 batch.begin(); yourBitmapFontName.setColor(1.0f, 1.0f, 1.0f, 1.0f); yourBitmapFontName.draw(batch, yourScoreName, 25, 100); batch.end(); 

使用：font.setColor（）方法中的参数，以便您可以看到它们与背景颜色形成对比，font.draw（）方法中的数字参数可以获得左上角显示的得分相关纹理（ font.draw（）方法中的最后两个数字参数表示得分纹理的x和y坐标。

第五步：跑吧，然后微笑。

相同的逻辑将适用于显示“GAME OVER”。 出于启发式目的，我将把逻辑的创建留给你。

阅读链接中的文档，以深入了解魔术。

Answer 2

要显示分数，您可以创建一个舞台。

 Stage stage = new Stage(); stage = new Stage(); stage.setCamera(cam); stage.setViewport(WIDTH, HEIGHT, false); 

然后你必须创建一个标签和一个文本字体。 所以你可以在libgdx wiki上查看详细信息。

 Label text; LabelStyle textStyle; BitmapFont font = new BitmapFont(); //font.setUseIntegerPositions(false);(Optional) textStyle = new LabelStyle(); textStyle.font = font; text = new Label("Gamever",textStyle); text.setBounds(0,.2f,Room.WIDTH,2); text.setFontScale(1f,1f); 

然后在游戏丢失时将其添加到舞台上：

 stage.addActor(text);