code: public void setSimpleColumn(float llx, float lly, float urx, float ury) {
          leftX = Math.min(llx, urx);
          maxY = Math.max(lly, ury);
          minY = Math.min(lly, ury);
          rightX = Math.max(llx, urx);
          yLine = maxY;
          rectangularWidth = rightX - leftX;
          if (rectangularWidth < 0)
              rectangularWidth = 0;
          rectangularMode = true;
      }
docs: Simplified method for rectangular columns.
  
  @param llx
  @param lly
  @param urx
  @param ury