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我正在使用 libgdx 创建一个破砖游戏，使用 TiledMapEditor 创建我的关卡。我有一个图层用于我的砖图形和一个图层用于我的砖对象。我与我的砖对象发生碰撞，当发生碰撞并工作时，我将砖图形图层中的图块设置为空。太棒了，太棒了……除了我已经将我的边缘创建为多个大小的瓷砖。所以当我与我的砖对象发生碰撞时，它会关闭碰撞并删除该特定的单元格图形。留下一半的砖块仍然显示在屏幕上。我检查了有关 tiledMaps、libdx dox 的文档并搜索了 slack/goodle/youtube/tiled dox。我想创建一种方法来检查周围的单元格是否不为空，然后将它们变为空，但是当我将砖块放在一起时，这将不起作用。任何想法或建议，甚至是在哪里寻找的提示都将不胜感激。或者改变我的砖块尺寸以适应一块瓷砖。我宁愿想办法删除指定对象上的所有单元格

用于创建我的交互式对象的类

    public InteractiveTileObject(World world, TiledMap map, Rectangle rect) {
        this.world = world;
        this.map = map;
        this.rect = rect;

        bDef = new BodyDef();
        fDef = new FixtureDef();
        shape = new PolygonShape();

        bDef.type = BodyDef.BodyType.StaticBody;
        bDef.position.set((rect.getX() * Arma.VSCALE) + (rect.getWidth() * Arma.VSCALE / 2),
                (rect.getY() * Arma.VSCALE) + (rect.getHeight() * Arma.VSCALE / 2));

        body = world.createBody(bDef);

        shape.setAsBox(rect.getWidth() * Arma.VSCALE / 2, rect.getHeight() * Arma.VSCALE / 2);
        fDef.shape = shape;
        fixture = body.createFixture(fDef);
    }

    public abstract void onHit();

    public void setCategoryFilter(short filterBit){
        Filter filter = new Filter();
        filter.categoryBits = filterBit;
        fixture.setFilterData(filter);
    }
    public TiledMapTileLayer.Cell getCell(){
        int column = (int)(body.getPosition().x / Arma.VSCALE / 50);
        int row = (int)(body.getPosition().y / Arma.VSCALE / 50);
        TiledMapTileLayer layer = (TiledMapTileLayer) map.getLayers().get(2);
        return layer.getCell(column,row);
    }
}

从 TiledMapEditor 中提取对象的类

public B2WorldCreator(PlayScreen screen) {
        World world = screen.getWorld();
        TiledMap map = screen.getMap();


        BodyDef bDef = new BodyDef();
        PolygonShape shape = new PolygonShape();
        FixtureDef fDef = new FixtureDef();
        Body body;

        //create boundy body/fix
        for (MapObject object : map.getLayers().get(3).getObjects().getByType(RectangleMapObject.class)) {
            Rectangle rect = ((RectangleMapObject) object).getRectangle();
            new Boundary(world, map, rect);
        }
        //create bricks body/fix
        for (MapObject object : map.getLayers().get(4).getObjects().getByType(RectangleMapObject.class)) {
            Rectangle rect = ((RectangleMapObject) object).getRectangle();
            new Brick(world, map, rect);
        }

        //create wall light body/fix
        for (MapObject object : map.getLayers().get(5).getObjects().getByType(RectangleMapObject.class)) {
            Rectangle rect = ((RectangleMapObject) object).getRectangle();
            new Wall(world, map, rect);
        }
    }
}

砖类

public class Brick extends InteractiveTileObject{

    public Brick(World world, TiledMap map, Rectangle bounds) {
        super(world, map, bounds);
        fixture.setUserData(this);
        setCategoryFilter(Arma.BRICK_BIT);
    }

    @Override
    public void onHit() {
        Gdx.app.log("Brick", "Collision");
        setCategoryFilter(Arma.DEYSTROYED_BIT);
        getCell().setTile(null);

    }
}

我创建了这个有效但仍需要输入对象大小的方法，我宁愿让你的方法工作 Tobias。

public void getCells(int width, int height){
        int column = (int)((body.getPosition().x / Arma.VSCALE -25) / 50);
        int row = (int)((body.getPosition().y / Arma.VSCALE -25) / 50 );
        TiledMapTileLayer layer = (TiledMapTileLayer) map.getLayers().get(2);
        for (int i = 0; i < width; i++){
            for (int k = 0; k < height; k++){
                if (layer.getCell(column + i, row + k) != null)
                    layer.getCell(column + i, row + k).setTile(null);
            }
        }
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1 回答 1

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您正在选择要按其在平铺地图上的位置删除的单元格。您可以对被击中的 Box2D 主体范围内的其他单元格执行相同操作。唯一的区别是，检查被测试的位置是否仍然在身体内部有点困难（目前你只检查身体的位置）。

解决方案可能如下所示：

public class InteractiveTileObject {

    // ... other methods

    public Array<TiledMapTileLayer.Cell> getCells(){
        Array<TiledMapTileLayer.Cell> cells = new Array<>();
        TiledMapTileLayer layer = (TiledMapTileLayer) map.getLayers().get(2);
        
        for (int i = 0; i < MAX_NUMBER_OF_CELLS_PER_BODY; i++) {
            for (int j = 0; j < MAX_NUMBER_OF_CELLS_PER_BODY; j++) {
                float x = body.getPosition().x + i * SIZE_OF_A_TILE_CELL;
                float y = body.getPosition().y + j * SIZE_OF_A_TILE_CELL;
                if (doesBodyContainPoint(body, x, y)) {
                    int column = (int)(x / Arma.VSCALE / 50);
                    int row = (int)(y / Arma.VSCALE / 50);
                    cells.add(layer.getCell(column, row));
                }
            }
        }
        
        return cells;
    }

    private boolean doesBodyContainPoint(Body body, float x, float y) {
        // to check whether the body contains a point you need to check whether any of the body's fixtures contains the point:
        for (Fixture fixture : body.getFixtureList()) {
            if (fixture.testPoint(new Vector2(x, y)) {
                return true;
            }
        }
        return false;
    }
}

在你填写了常量之后MAX_NUMBER_OF_CELLS_PER_BODY，SIZE_OF_A_TILE_CELL你应该能够找到这个 body 包含的每个单元格。然后你可以像以前一样删除它们。

于 2021-01-18T17:03:39.787 回答