无法使用OrthogonalTiledMapRenderer(Android)渲染.tmx地图

问题描述

我很难使用LibGdx将地图正确显示在我的android应用上.首先是我的代码:

I am having a hard time getting a map to display correctly on my android app using LibGdx. First up here is my code:

public class PlayState extends State {
  private LittleMan littleMan;
  private TiledMap map;
  OrthogonalTiledMapRenderer tiledMapRenderer;

  OrthographicCamera camera;

public PlayState(GameStateManager gsm) {
    super(gsm);
    littleMan = new LittleMan(50,100);
    float w = Gdx.graphics.getWidth();
    float h = Gdx.graphics.getHeight();
    camera = new OrthographicCamera();
    camera.setToOrtho(false, w,h);
    camera.update();
    TmxMapLoader loader = new TmxMapLoader();
    map = loader.load("ste_barbe_map.tmx");
    tiledMapRenderer = new OrthogonalTiledMapRenderer(map);
}

@Override
protected void handleInput() {
}

@Override
public void update(float dt) {
}

@Override
public void render(SpriteBatch sb) {
    // if viewport modified
    // sb.setProjectionMatrix(cam.combined);
    Gdx.gl.glClearColor(1, 0, 0, 1);
    Gdx.gl.glBlendFunc(GL20.GL_SRC_ALPHA, GL20.GL_ONE_MINUS_SRC_ALPHA);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    camera.update();
    tiledMapRenderer.setView(camera);
    tiledMapRenderer.render();
    /*
    sb.begin();
    sb.draw(littleMan.getTexture(),littleMan.getPosition().x,littleMan.getPosition().y);
    sb.end();
    */
}

@Override
// free some ressources
public void dispose() {
}
}

因此，当我尝试运行该应用程序并调用render方法时，我只会得到一个红色背景，上面没有任何内容.这是我尝试过的一些事情:

So when i try to run the app and call the render method i just get a red background with nothing on it.Here are some things i tried:

1. 使用仅带有一行图块的较小地图，即可正确显示(即使我不确定其位置是否正确):

1. 按比例缩放:我可以显示地图，但是它很小，或者我只能看到边缘

此行更改为:tiledMapRenderer = new OrthogonalTiledMapRenderer(map,0.5f);我得到:

with this line changed to : tiledMapRenderer = new OrthogonalTiledMapRenderer(map,0.5f);I get:

此行:tiledMapRenderer = new OrthogonalTiledMapRenderer(map,1/8f);

我得到了这张非常缩小的地图图像:

I get this very zoomed out image of the map:

有人知道我在做什么错吗?也许我的tmx文件不好，也许是相机的东西，或者我真的不知道的东西.感谢您的帮助！

Does anyone know what i am doing wrong? Maybe my tmx file is bad, maybe it's something with the camera, or something else i really don't know.Thanks for the help!

推荐答案

根据这样的地图设置Camera ViewPort.

Set Camera ViewPort according to your map like this.

TmxMapLoader loader = new TmxMapLoader();
map = loader.load("ste_barbe_map.tmx");
tiledMapRenderer = new OrthogonalTiledMapRenderer(map);
TiledMapTileLayer layer=(TiledMapTileLayer)map.getLayers().get(0);

float w=layer.getTileWidth()*layer.getWidth();   // 100*34
float h=layer.getTileHeight()*layer.getHeight();  // 100*34

camera=new OrthographicCamera(w,h);
// you can manually set camera viewport
//camera=new OrthographicCamera(100*34,100*34);

您也可以尝试

camera=new OrthographicCamera(34,34);
float unitScale = 1 / 100f;
OrthogonalTiledMapRenderer renderer = new OrthogonalTiledMapRenderer(map, unitScale);

了解更多unitScale的工作原理:
https://github.com/libgdx/libgdx/wiki/Tile-maps#rendering-tiled-maps

Get more how unitScale works :
https://github.com/libgdx/libgdx/wiki/Tile-maps#rendering-tiled-maps

编辑

我检查了.tmx文件，它有3层.在索引0处有一个TiledMapImageLayer，这就是为什么它会给您带来转换错误.在索引1和2处有TiledMapTileLayer，因此从索引1获得层.

I checked .tmx file, it has 3 layer. There is a TiledMapImageLayer at 0 index that's why it give you cast error. At index 1 and 2 there is TiledMapTileLayer so get layer from index 1.

我尝试将您的.tmx加载到我的代码中，并在显示时呈现.

I tried to load your .tmx in my code and it render on display.

public class TestGame extends Game {

    TiledMap map;
    OrthographicCamera camera;
    TiledMapRenderer tiledMapRenderer;

    @Override
    public void create() {

        TmxMapLoader tmxMapLoader=new TmxMapLoader();

        map=tmxMapLoader.load("ste_barbe_map.tmx");

        TiledMapTileLayer layer=(TiledMapTileLayer) map.getLayers().get(1);

        tiledMapRenderer= new OrthogonalTiledMapRenderer(map);
        camera=new OrthographicCamera();
        camera.update();
        float widthHeightRatio=1.66f;
        camera.setToOrtho(false,(layer.getWidth()*layer.getTileWidth())/widthHeightRatio,layer.getHeight()*layer.getTileHeight());
    }

    @Override
    public void render() {

        Gdx.gl.glClearColor(1,0,0,1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        camera.update();
        tiledMapRenderer.setView(camera);
        tiledMapRenderer.render();
    }
}

在水平和垂直方向具有相同图块数量的地图.您的游戏将是横向的还是纵向的，因此请保持这样的比例(横向时水平为25瓦片，垂直为15瓦片).

Map having same number of tile in horizontal and in vertical. Your game will be either in landscape or portrait so keep a ratio for this like(for landscape 25 tile in horizontal and 15 tile in vertical).

widthHeightRatio变为1.

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