docs: private void createLine( int index0 , int index1 , List<Point2D_I32> contour , LineGeneral2D_F64 line )
  	{
  		if( index1 < 0 )
  			System.out.println("SHIT");
  		Point2D_I32 p0 = contour.get(index0);
  		Point2D_I32 p1 = contour.get(index1);
  
  //		System.out.println("createLine "+p0+" "+p1);
  
  		work.a.set(p0.x, p0.y);
  		work.b.set(p1.x, p1.y);
  
  		UtilLine2D_F64.convert(work,line);
  
  		// ensure A*A + B*B = 1
  		line.normalize();
  	}