java - Libgdx减少调用和优化游戏

Question

我试图减少每次在我的游戏上调用屏幕时进行的调用次数，以使我的游戏更快，我注意到我在每个屏幕上都做了很多相同的计算。我该如何避免这种情况？

我几乎在每个屏幕上都这样做

public class ****Screen implements Screen {
    @Override
    public void show() {

    float screenWidth = Gdx.graphics.getWidth();
    float screenHeight = Gdx.graphics.getHeight();
    float gameWidth = 360;
    float gameHeight = screenHeight / (screenWidth / gameWidth);
    midPointY = (int) (gameHeight / 2);
    cam = new OrthographicCamera();
    cam.setToOrtho(true, gameWidth, gameHeight);
    viewport = new FitViewport(gameWidth, gameHeight, cam);
    viewport.apply();
    stage = new Stage(viewport);
    Gdx.input.setInputProcessor(stage);

但是我有一个 GameClass..我怎样才能在我的游戏类(下面)中实现上面的内容并且只需要调用它一次？...

public class Start extends Game {
     @Override
    public void create() {
    float screenWidth = Gdx.graphics.getWidth();
    float screenHeight = Gdx.graphics.getHeight();
    float gameWidth = 360;
    float gameHeight = screenHeight / (screenWidth / gameWidth);

    assets = new AssetLoader();
    assetManager = new AssetManager();
    camera = new OrthographicCamera();
    camera.setToOrtho(true, gameWidth, gameHeight);

    //initialize screens here
    mainMenu = new MenuScreen(this);
    loadingScreen = new LoadingScreen(this);
    gameScreen = new GameScreen(this);

    .......

    //call assets
    AssetLoader.load();

    //start mainmenu...
    this.setScreen(mainMenu);
}

Answer 1

首先我必须告诉你实际上这不会加速你的游戏。 如果您每 20 秒更换一次屏幕，那么这意味着游戏每 1200 帧计算 1 帧。 但是我和你一样，在做游戏的时候真的在寻找最优化的方法。

我找到了这个案例的解决方案。 您可以传递在所有屏幕中使用的对象，从游戏类到屏幕类。

屏幕类

public class MainMenuScreen implements Screen {

    public MainMenuScreen(OrthographicCamera camera) {
        this.camera=camera;
    }

//...Rest of class omitted for succinctness.
}

游戏类

public class Starts extends Game {

 OrthographicCamera camera;
    public void create() {
        camera=new OrthographicCamera();
        camera.setToOrtho(false, 800, 480);
        this.setScreen(new MainMenuScreen(camera));// change screen and pass camera to new screen.
    }

}

或者您甚至可以像这样通过整个游戏类(class)。

public class MainMenuScreen implements Screen {

final Starts game;
public MainMenuScreen(final Starts game) {
    this.game = game;

}

@Override
public void render(float delta) {
    Gdx.gl.glClearColor(0, 0, 0.2f, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

    game.camera.update();
    game.batch.setProjectionMatrix(game.camera.combined);

    game.batch.begin();
    game.font.draw(...);
    game.font.draw(...);
    game.batch.end();

    if (Gdx.input.isTouched()) {
        game.setScreen(new AnotherScreen(game));
        dispose();
    }
}

}

只需要在游戏类中这样调用即可。所以你可以在所有屏幕上使用游戏的阶段批处理字体等。

this.setScreen(new MainMenuScreen(this));