Question

嗨我在libgdx中切换屏幕时遇到问题。我正在建造一个小行星游戏克隆。因此，首先我的MainMenuScreen类（使用Fitviewport）被渲染，然后我将setScreen（）调用到GameScreen（GameScreen不使用Fitviewport），除了第二个屏幕呈现就像使用Fitviewport一样。如果我调整第二个屏幕的大小，则整个窗口用于渲染。为什么会这样？这是一些图片......

MainMenuScreen class

GameScreen class after switching screens, the screen has black bars on the side (I colored the boundary in red for you) which I dont want

我希望GameScreen使用所有窗口区域进行渲染，而不是像MainMenu那样有黑条。我也没有在GameScreen中使用任何Fitviewport。

以下是我的MainMenuScreen类的相关部分：

public class MainMenuScreen implements Screen
{
    private static final String TAG = "MainMenu";
    private static final int VIRTUAL_WIDTH = 400;
    private static final int VIRTUAL_HEIGHT = 400;
    MyGdxGame game;

       ...

    public MainMenuScreen(MyGdxGame game)
    {

        this.game = game;
        viewport = new FitViewport(VIRTUAL_WIDTH, VIRTUAL_HEIGHT);
        stage = new Stage(viewport);

        // Play button listener
        btnPlay.addListener( new ClickListener() {
            @Override
            public void clicked(InputEvent event, float x, float y) {
                Gdx.app.log(TAG, "PLAY");
              MainMenuScreen.this.game.setScreen(MainMenuScreen.this.game.gameScreen);
            };
        });

             ....
    }

这是我的GameScreen类：

MyGdxGame game;
OrthographicCamera guiCam;
World world;
WorldRenderer renderer;


public GameScreen(MyGdxGame game, SpriteBatch batch)
{
    this.game = game;
    guiCam = new OrthographicCamera(400, 400);
    guiCam.position.set(400 / 2, 400 / 2, 0);
    world = new World();
    renderer = new WorldRenderer(game, batch, world);
}

public void draw()
{
    GL20 gl = Gdx.gl;
    gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

    renderer.render();
}

@Override
public void show()
{
    world.createLevel();
}

@Override
public void render(float delta)
{
    draw();
}

@Override
public void resize(int width, int height)
{

}

@Override
public void pause()
{

}

@Override
public void resume()
{

}

@Override
public void hide()
{

}

@Override
public void dispose()
{

}

Answer 1

好的家伙我发现了问题，这行代码：

public void resize(int width, int height)
    {
        viewport.update(width, height, true);

    }

每当更新视口时，您还要更新底层的opengl视口，这会导致黑条持续到第二个屏幕（https://github.com/libgdx/libgdx/wiki/Viewports）。因此，如果要将其重置为正常，则必须在第二个屏幕show（）方法（https://github.com/libgdx/libgdx/wiki/Scene2d）中使用以下代码行：

Gdx.gl.glViewport(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());

Libgdx切换屏幕和视口

1 个答案: