Part 2 - Medium blog - Box2D & Box2d Lights

Box2DRunner.java

public class Box2DRunner extends ApplicationAdapter
{
  private OrthographicCamera camera;                  //#1
  
  private World world;                                //#2
  private Box2DDebugRenderer debugRenderer;           //#3
  
  @Override
  public void create()
  {
    camera = new OrthographicCamera(Gdx.graphics.getWidth(),
                           Gdx.graphics.getHeight()); //#4
    
    world = new World(new Vector2(0,-9.8f), false);   //#5
    debugRenderer = new Box2DDebugRenderer();         //#6
  }
  
  @Override 
  public void render()
  {
    Gdx.gl.glClearColor(0,0,0,0);                     //#7
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);         //#8
    
    world.step(1/60f, 6, 2);                          //#9
    debugRenderer.render(world, camera.combined);     //#10
  }
}