LibGDX Box2D平铺地图工件

Question

I have a problem with rendering tiled map in LibGDX. When I move the camera appear artifacts.

This is my tileset with margin and spacing (fragment): tileset

When I move the camera appear artifacts: artifacts

And here is my rendering world class.

private GameApp game;

private OrthographicCamera gameCamera;
private Viewport viewport;

private TiledMap map;
private TmxMapLoader mapLoader;
private OrthogonalTiledMapRenderer mapRenderer;

private MainCharacter character;

private World world;
private Box2DDebugRenderer worldRenderer;

public GameplayScreen(GameApp game) {
    this.game = game;

    gameCamera = new OrthographicCamera();

    viewport = new FitViewport(
            game.getDisplayWidth() / GameApp.PPM,
            game.getDisplayHeight() / GameApp.PPM,
            gameCamera
        );

    mapLoader = new TmxMapLoader();
    map = mapLoader.load("testmap1.tmx");
    mapRenderer = new OrthogonalTiledMapRenderer(map, 1 / GameApp.PPM);

    gameCamera.position.set(new Vector2(600 / GameApp.PPM, 200 / GameApp.PPM), 0);
    gameCamera.zoom -= 0.5;

    world = new World(new Vector2(0, -10), true);
    worldRenderer = new Box2DDebugRenderer();

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

    for (MapObject mapObject : map.getLayers().get("obstacles").getObjects().getByType(RectangleMapObject.class)) {
        Rectangle rectangle = ((RectangleMapObject) mapObject).getRectangle();

        bDef.type = BodyDef.BodyType.StaticBody;
        bDef.position.set(
                (rectangle.getX() + rectangle.getWidth() / 2) / GameApp.PPM, 
                (rectangle.getY() + rectangle.getHeight() / 2) / GameApp.PPM
        );

        body = world.createBody(bDef);

        shape.setAsBox(rectangle.getWidth() / 2 / GameApp.PPM, rectangle.getHeight() / 2 / GameApp.PPM);
        fDef.shape = shape;

        body.createFixture(fDef);
    }

    character = new MainCharacter(world);
}

@Override
public void show() {

}

public void handleInput(float delta) {
    if (Gdx.input.isKeyJustPressed(Input.Keys.UP)) {
        character.getBody().applyLinearImpulse(new Vector2(0, 3.8f), character.getBody().getWorldCenter(), true);
    }

    if (Gdx.input.isKeyPressed(Input.Keys.RIGHT) && character.getBody().getLinearVelocity().x <= 1) {
        character.getBody().applyLinearImpulse(new Vector2(0.05f, 0), character.getBody().getWorldCenter(), true);
    }

    if (Gdx.input.isKeyPressed(Input.Keys.LEFT) && character.getBody().getLinearVelocity().x >= -1) {
        character.getBody().applyLinearImpulse(new Vector2(-0.05f, 0), character.getBody().getWorldCenter(), true);
    }
}

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

    world.step(1/60f, 6, 2);

    gameCamera.position.x = character.getBody().getPosition().x;
    gameCamera.position.y = character.getBody().getPosition().y;

    gameCamera.update();
    mapRenderer.setView(gameCamera);
}

@Override
public void render(float delta) {
    update(delta);

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

    mapRenderer.render();
    worldRenderer.render(world, gameCamera.combined);
}

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

...

I read that the spacing in the tileset help. But it still does not work properly.

---

EDIT:

TmxMapLoader.Parameters par = new TmxMapLoader.Parameters();
  par.textureMinFilter = TextureFilter.Nearest;
  par.textureMagFilter = TextureFilter.Nearest;

map = mapLoader.load("testmap1.tmx", par);

I edit my code, but still not work. Seeking solutions for a few days.

---

EDIT2

I try again. Code:

atlasMapLoader = new AtlasTmxMapLoader();
testMap = atlasMapLoader.load("testmap1.tmx");

This load my map. I have ".txt" file:

In Tiled Editor I add property to a map called "atlas" value "TilesetBig.txt".

Now, the map does not display tiles. Obstacles with box2d are still visible. What can I do wrong?

---

Finally i used OrthoCachedTiledMapRendered.

Answer 1

You should pack your tileset with Nearest texture filter being set.

If you are using Linear one the GL is averaging border pixels using surrounding one what causes glitches like this.

Read this article to get more information about texture filters in LibGDX.