Proximity 3D to mesh or surface

I am able to convert point cloud to mesh using inspiring work of Nik Willmore on Metaballs and Meralines but the problems are:

  1. his definition takes points as center lines of mesh volume which make the 3D object bigger that it should be.
  2. it takes a lot of calculation time to convert points clouds to mesh surfaces.

I only need to convert line connection of proximity 3D to surfaces but how?