code: @Override
      public void setup(IAtomContainer atomContainer, Rectangle screen) {
          this.setScale(atomContainer);
          Rectangle2D bounds = BoundsCalculator.calculateBounds(atomContainer);
          this.modelCenter = new Point2d(bounds.getCenterX(), bounds.getCenterY());
          this.drawCenter = new Point2d(screen.getCenterX(), screen.getCenterY());
          this.setup();
      }
docs: Setup the transformations necessary to draw this Atom Container.
  
  @param atomContainer the atom container to use in the setup
  @param screen the area to draw on