LibGDX:如何使平铺地图图块可点击?

时间:2014-06-06 11:02:17

标签: java libgdx tiled

如何为平铺地图中的切片添加点击侦听器,以便在使用鼠标选择切片时它会突出显示?

1 个答案:

答案 0 :(得分:21)

libGDX不直接支持,因为TiledMap的东西仅用于渲染。

您可以轻松创建Stage,它将作为TiledMap的某种叠加输入层。只需为每个图块创建一个Actor,其大小与该图块的位置相同。然后,您可以将EventListener添加到这些演员,以便能够识别这些演员的点击等内容。

这些演员应该提及他们的“起源”,即TiledMapTileLayer.Cell。因此,您可以在处理这些事件时随时从演员返回到单元格。

以下说明了如何执行此操作:

此Actor负责捕获事件并保留基于以下内容的信息:

public class TiledMapActor extends Actor {

    private TiledMap tiledMap;

    private TiledMapTileLayer tiledLayer;

    private TiledMapTileLayer.Cell cell;

    public TiledMapActor(TiledMap tiledMap, TiledMapTileLayer tiledLayer, TiledMapTileLayer.Cell cell) {
        this.tiledMap = tiledMap;
        this.tiledLayer = tiledLayer;
        this.cell = cell;
    }

}

这个小听众可以附加到其中一个演员身上,并且可以做任何逻辑:

public class TiledMapClickListener extends ClickListener {

    private TiledMapActor actor;

    public TiledMapClickListener(TiledMapActor actor) {
        this.actor = actor;
    }

    @Override
    public void clicked(InputEvent event, float x, float y) {
        System.out.println(actor.cell + " has been clicked.");
    }
}

以下类实际上从给定的地图创建actor并将它们连接到侦听器:

public class TiledMapStage extends Stage {

    private TiledMap tiledMap;

    public TiledMapStage(TiledMap tiledMap) {
        this.tiledMap = tiledMap;

        for (MapLayer layer : tiledMap.getLayers()) {
            TiledMapTileLayer tiledLayer = (TiledMapTileLayer)layer;
            createActorsForLayer(tiledLayer);
        }
    }

    private void createActorsForLayer(TiledMapTileLayer tiledLayer) {
        for (int x = 0; x < tiledLayer.getWidth(); x++) {
            for (int y = 0; y < tiledLayer.getHeight(); y++) {
                TiledMapTileLayer.Cell cell = tiledLayer.getCell(x, y);
                TiledMapActor actor = new TiledMapActor(tiledMap, tiledLayer, cell);
                actor.setBounds(x * tiledLayer.getTileWidth(), y * tiledLayer.getTileHeight(), tiledLayer.getTileWidth(),
                        tiledLayer.getTileHeight());
                addActor(actor);
                EventListener eventListener = new TiledMapClickListener(actor);
                actor.addListener(eventListener);
            }
        }
    }
}

现在TiledMapStage将为您完成所有工作。您需要做的就是:

Stage stage = new TiledMapStage(tiledMap);
Gdx.input.setInputProcessor(stage);

在渲染(...)中,您需要调用stage.act()。请记住对舞台使用相同的Viewport来渲染TiledMap。否则,输入和渲染的地图将不会对齐。