\drawPointsMeshinc[
  tikz,
  color = blue!50,
  print = points,
  meshpoint = x,
  scale=0.8cm,
  ]{(0.3,0.3);(1.5,1);(4,0);(4.5,2.5);(1.81,2.14);(2.5,0.5);(2.8,1.5)}%
  {% code before
  }%
  {% code after
    \node[color = blue!50]  at (0,2) {Mesh $\mathbb{T}$} ;
  }
  \buildMeshBWinc[%
  tikz,
  bbox = show,
  color = red,
  colorBbox = blue!30,
  print = points,
  meshpoint = x,
  scale=0.8cm
  ]{(0.3,0.3);(1.5,1);(4,0);(4.5,2.5);(1.81,2.14);(2.5,0.5);(2.8,1.5)}%
  {% code before
  }
  {% code after
    \draw[<->,thick, color=green] (MeshPoints3) -- (MeshPoints9);
  }