AWS Thinkbox Discussion Forums

Dealing with Mesh holes

This Frost mesh used a particle file from a laser scan. Holes in laser scans are common due to obstructions like other objects, plants etc.

Frost is impressive for its speed and the mesh details.
The 2 sided meshing makes the mesh water tight. This kind of tricks mesh editing software to finding no “holes” to fill - Frost meshes have no open vertices.

Is there a work flow that allows filling of these holes?

A suggestion was to insert Max planes into the voids with segments that are about = to the radius used running Frost. Frost and Krakatoa treat the shapes vertices as particles.
Very cool, but this is time consuming and many of the voids aren’t really planar.

Is there a workflow involving Genome or Krakatoa that addresses the mesh holes?

  1. Maybe to automatically remove the “inner” mesh and leave the holes either repairable or, if it’s a true opening, to mesh the outline.

  2. A shape recognition outcome from Genome’s loops and iterations that “suggests” holes that need closing?

To deal with the holes, I used Autodesk Meshmixer which has tools to pull the edges of the mesh to close holes. There was always a small gap, since I could not stitch up the edges with Meshmixer.
I sent the STL to i.materialise for 3D printing in polyamide (nylon) and the Frost created mesh printed smooth. Any gaps were easy to fill.

Workflow was: Scanning with Faro Focus3D > Registration in Faro Scene (4mm accuracy) > STL mesh generated by Frost (2 minutes!!) > Mesh cleaning > 3D print i.materialise.

Frost does avoid a lot of holes in the way it uses point cloud particles. I will look for ways to open up the edges of any holes so mesh editors can go to work on them!

COOL!! send me aPM with your email address, I would love to talk some more about what we can do for you in the future…

cb

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