world.setSystem(new CameraSystem(container));
world.setSystem(new AmmoRegenerationSystem());
terrainRenderSystem = world.setSystem(new TerrainRenderSystem(container), true);
renderSystem = world.setSystem(new RenderSystem(container), true);
hudRenderSystem = world.setSystem(new HudRenderSystem(container), true);
healthRenderSystem = world.setSystem(new HealthRenderSystem(container), true);
crosshairRenderSystem = world.setSystem(new CrosshairRenderSystem(container), true);
world.initialize();