LibGDX rendering routine using a TiledMap renderer, the Box2D debug renderer and sprites

WorldRenderingSystem_extract.java

@Override
public void update(float deltaTime) {
    /* glClear etc... */

    // mapCamera is an OrthogonalCamera
    mapCamera.position.set(cameraMovable.position.x * mapComponent.pixelsPerMeter,
            cameraMovable.position.y * mapComponent.pixelsPerMeter, 0);
    mapCamera.zoom = 1.0f/cameraComponent.camera_zoom;
    mapCamera.update();

    // render the map - mapRenderer is an OrthogonalTiledMapRenderer
    NavigationScreen.spriteBatch.setProjectionMatrix(mapCamera.combined);
    mapRenderer.render();

    // render physical bodies and triggers - debugRenderer is a Box2DDebugRenderer
    if(displayDebugRenderer) {
        debugProjectionMatrix = mapCamera.combined.cpy();
        debugProjectionMatrix.scale(mapComponent.pixelsPerMeter, mapComponent.pixelsPerMeter, 1f);
        debugRenderer.render(Managers.physics.world, debugProjectionMatrix);
    }

    // render sprites
    NavigationScreen.spriteBatch.begin();
    for(/* ... */) {
        // spritePosition := position in world coordinates

        sprite.setCenter(spritePosition.x * mapComponent.pixelsPerMeter,
                spritePosition.y * mapComponent.pixelsPerMeter);

        sprite.draw(NavigationScreen.spriteBatch);
    }
    NavigationScreen.spriteBatch.end();
}

@Override
public void resize(int width, int height) {
        float aspectRatio = (float) width / (float) height;
        // in my code this is called howManyTexturePixelsWeSeeInAScreenHeight
        float camHeight = screenHeightInMeters*mapComponent.pixelsPerMeter;
        cameraComponent.mapCamera = new OrthographicCamera(aspectRatio*camHeight, camHeight);
}