Polygon Mesh Hole Filling

[Igor]

If I have hole in polygon mesh, what is best method to close it? I tried PolyCap and for flat polygons it works very good but not for curvy shape. Is there any other SOP that can do this?

Thanks

[f1480187]

 

The best method I found so far is a Skin node. It doesn't provide vertex number rotation or world-align patches, but does a good job.

close_hole.hipnc

[Igor]

Thank you F1, this is nice method! But is it possible to close hole so that mesh is smooth? I know that I can use Sculpt Node but is there a way to do it automatical like in Video? I want to 3D print a model and smooth mesh is important.

https://www.youtube.com/watch?v=kfmY4Wk8bhA

 

Thanks

[f1480187]

That's pretty advanced stuff on video. Here is what you may try, as a simpler way using VDBs.

surface_aware_hole_close.hipnc

Edited July 23, 2016 by f1480187

[petz]

8 hours ago, Igor said:

Thank you F1, this is nice method! But is it possible to close hole so that mesh is smooth? I know that I can use Sculpt Node but is there a way to do it automatical like in Video? I want to 3D print a model and smooth mesh is important.

https://www.youtube.com/watch?v=kfmY4Wk8bhA

 

Thanks

this kind of hole filling with curvature continuity from the video is not an trivial thing to do and i don´t think there exist any out of the box solution in houdini you could use. as long as you don´t want to implement it by yourself you might be better off using one of the open source programs like meshlab or meshmixer for this. if you need a more procedural way you could run meshlab as standalone from the unix-sop.

hth.

petz

 

 

 

 

[Igor]

@F1 Thank you very much for File! It works good for most part of my geometry. It is a nice method.

@Petz Thank you for tip about MeshLab! I did not know that I can use Standalone version from inside Houdini with Unix SOP.

Thanks again!

[petz]

attached is a quick implementation of a thin plate energy minimization. its pretty much the same algorithm meshlab and probably also meshmixer uses for hole filling.
for high resolution meshes you may want to port it to the hdk or at least use a sparse matrix library instead of numpy.

hth.
petz

fill_hole.hipnc

[Igor]

Thank you very much Petz! I do not understand algorithm but your method works perfect