Getting the computer to know when a sprite walks over a specific tile in a tmx map

Question

I have a Circle shape that is going to represent the character I will play and control. I have a tmx map, and in the map there are red squares that are meant to represent "fences". The fences are in each corner of the map, inside the fences I have the ground that looks the same as the rest of the ground in the map, but I want to make it so that the game knows when the character is standing on those tiles in the map. can anyone help me? I don't know if it will help but here is the code:

public class PlayScreen implements Screen{

    private Game game;
    private OrthographicCamera gamecam;

    private Viewport gamePort;

    private TmxMapLoader mapLoader;
    private TiledMap map;
    OrthogonalTiledMapRenderer renderer;

    //Box@d variables
    private World world;
    private Box2DDebugRenderer b2dr;

    private Hero hero;

    private ArrayList<Rectangle> specGroundList;
    private boolean heroOnGround;

    public PlayScreen(BasicGame game){
        this.game = game;
        gamecam = new OrthographicCamera();
        gamePort = new FitViewport(BasicGame.V_WIDTH, BasicGame.V_HEIGHT, gamecam);

        mapLoader = new TmxMapLoader();
        map = mapLoader.load("Basic Map.tmx");
        renderer = new OrthogonalTiledMapRenderer(map);
        gamecam.position.set(gamePort.getWorldWidth() / 2, gamePort.getWorldHeight() / 2, 0);

        world = new World(new Vector2(0, 0), true);
        b2dr = new Box2DDebugRenderer();

        hero = new Hero(world, this);

        specGroundList = new ArrayList<Rectangle>();

        world.setContactListener(new WorldContactListener());

        BodyDef bdef = new BodyDef();
        PolygonShape shape = new PolygonShape();
        FixtureDef fdef = new FixtureDef();
        Body body;

        //create fence bodies/fixtures
        for(MapObject object: map.getLayers().get(3).getObjects().getByType(RectangleMapObject.class)){
            Rectangle rect = ((RectangleMapObject) object).getRectangle();

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

            body = world.createBody(bdef);

            shape.setAsBox(rect.getWidth() / 2, rect.getHeight() / 2);
            fdef.shape = shape;
            body.createFixture(fdef);
        }

        //create special ground bodies/fixtures
        for(MapObject object: map.getLayers().get(2).getObjects().getByType(RectangleMapObject.class)) {
            Rectangle rect = ((RectangleMapObject) object).getRectangle();

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

            body = world.createBody(bdef);

            shape.setAsBox(rect.getWidth() / 2, rect.getHeight() / 2);
            fdef.shape = shape;
            body.createFixture(fdef);




        }

    }


    @Override
    public void render(float delta) {

        update(delta);

        // Clear the game screen with Black
        Gdx.gl.glClearColor(0, 0, 0, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        renderer.render();

        b2dr.render(world, gamecam.combined);



    }

    @Override
    public void show() {

    }

    public void handleInput(float dt){
        if(Gdx.input.isTouched()) {
//            gamecam.position.x += 100 * dt;
            gamecam.position.y -= 100 * dt;
        }
    }

    public void update(float dt){
        handleInput(dt);

        world.step(1/60f, 6, 0);

        hero.update(dt);

        for(Rectangle rect: specGroundList){

        }

        gamecam.update();
        renderer.setView(gamecam);


    }

    @Override
    public void resize(int width, int height) {
        gamePort.update(width, height);
    }

    @Override
    public void pause() {

    }

    @Override
    public void resume() {

    }

    @Override
    public void hide() {

    }

    @Override
    public void dispose() {

    }

    public Viewport getGamePort() {
        return gamePort;
    }
}

Answer 1

假设您的英雄有一个已知的位置，并且您的特殊地面区域是有方向的矩形，那么您不能只使用布尔函数返回如下内容：

Hero.x > rectangle.left & Hero.x < rectangle.right & hero.y > rectangle.bottom & hero.y < rectangle.top