LibGDX：平铺地图的视差效果

Question

需要在LibGDX和平铺地图的游戏中产生视差效果。 背景应该以不同的速度移动然后前景。 在文档中https://github.com/libgdx/libgdx/wiki/Tile-maps说：

通过单独渲染每个图层并修改每个图层的视图，您还可以实现视差效果。

当前的实现 ：使用PlayScreenVariantOne都可以工作，但背景以与前景相同的速度移动

public class PlayScreenVariantOne implements Screen {

    private TextureAtlas atlas;
    private OrthographicCamera gameCam;
    private Viewport viewport;
    private TmxMapLoader mapLoader;
    private TiledMap map;
    private OrthogonalTiledMapRenderer renderer;
    ...

    // ...
    // ... bla-bla-bla...
    // ...
    @Override
    public void render(float delta) {
        update(delta);
        Gdx.gl.glClearColor(0, 0, 0, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        renderer.setView(gameCam);
        renderer.render();

        game.batch.setProjectionMatrix(gameCam.combined);
        game.batch.begin();

        player.draw(game.batch);
        game.batch.end();
        hud.stage.draw();

    }
 }

视差实现 ：使用PlayScreenVariantTwo前景和背景以相同的速度渲染。 视差效果不起作用！ ：*（

public class PlayScreenVariantTwo implements Screen {

    private TextureAtlas atlas;
    private OrthographicCamera gameCam;
    private Viewport viewport;
    private TmxMapLoader mapLoader;
    private TiledMap map;
    private OrthogonalTiledMapRenderer renderer;
    ...

    // ...
    // ... bla-bla-bla...
    // ...
    @Override
    public void render(float delta) {
        update(delta);
        Gdx.gl.glClearColor(0, 0, 0, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        int[] backgroundLayers = { 7 };
        int[] ground = { 9 };

        renderer.setView(gameCam.combined, (gameCam.position.x - gameCam.viewportWidth / 2 - 2), gameCam.position.y - gameCam.viewportHeight / 2, gameCam.viewportWidth, gameCam.viewportHeight);
        renderer.render(backgroundLayers);

        renderer.setView(gameCam.combined, (gameCam.position.x - gameCam.viewportWidth / 2) / 10, gameCam.position.y - gameCam.viewportHeight / 2, gameCam.viewportWidth  * 10, gameCam.viewportHeight);
        renderer.render(ground);

        game.batch.setProjectionMatrix(gameCam.combined);
        game.batch.begin();

        player.draw(game.batch);
        game.batch.end();

        hud.stage.draw();

    }
 }

Answer 1

您是否尝试简单地将X（或Y，您需要的）坐标与背景因子相乘：

  renderer.setView(gameCam.combined, (gameCam.position.x*0.5 - gameCam.viewportWidth / 2 - 2), gameCam.position.y - gameCam.viewportHeight / 2, gameCam.viewportWidth, gameCam.viewportHeight);

要么

  renderer.setView(gameCam.combined, (gameCam.position.x - gameCam.viewportWidth / 2 - 2)*0.5, gameCam.position.y - gameCam.viewportHeight / 2, gameCam.viewportWidth, gameCam.viewportHeight);

我添加了“* 0.5”，因此背景会慢两倍。 不确定这两行中的哪一行会给你更好的结果 - 你必须尝试自己，但那就是ide - 乘以背景坐标，X或Y，你需要设置不同的速度。