code: @Override
      public void setup(IReaction reaction, Rectangle screen) {
          this.setScale(reaction);
          Rectangle2D bounds = BoundsCalculator.calculateBounds(reaction);
          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 Reaction.
  
  @param reaction
  @param screen