Example for the Fill Hole Function that Can Only Patch Small Holes

[pty0220]

Hello,

I am working with oral scans, and we intend to cut teeth and perform fill-hole operations only on the cut parts, just like in the tutorial video you shared.

https://www.youtube.com/watch?v=9Uhp7LnQf_g&lc=UgxdywAjVqNAZeNbuph4AaABAg.A4sjbETb281A4u-q7qFuoJ

However, as you might already know, oral scans usually have an open bottom, which causes the fill-hole algorithm to mistakenly identify and attempt to close the bottom part as a hole.

Could you please provide a Python example that can be used in such situations?

[Grantim]

Hello!

Here is simple example of how to fill newly created holes

from meshlib import mrmeshpy as mm

mesh = mm.makeCube()

facesToDelete = mm.FaceBitSet()
facesToDelete.resize(2)
facesToDelete.set(mm.FaceId(0))
facesToDelete.set(mm.FaceId(1))

expectedLoops = mm.findRightBoundary(mesh.topology,facesToDelete)

mesh.deleteFaces(facesToDelete)

for loop in expectedLoops:
    mm.fillHole(mesh, loop[0].sym())

[czc98]

Hello!
I want to determine whether to fill the hole by the length of the side of the hole.
but 'findHoleRepresentiveEdges' function returns only one side of the hole.
Could you provide an example of finding the complete boundary of a hole? Thanks.

[Fedr]

    /// returns one edge with no valid left face for every boundary in the mesh
    [[nodiscard]] MRMESH_API std::vector<EdgeId> MeshTopology::findHoleRepresentiveEdges() const;

So for every edge e0 from the returned vector please call the function

/// returns closed loop of region boundary starting from given region boundary edge (region faces on the right, and not-region faces or holes on the left);
/// if more than two boundary edges connect in one vertex, then the function makes the most abrupt turn to left
[[nodiscard]] MRMESH_API EdgeLoop trackRightBoundaryLoop( const MeshTopology & topology, EdgeId e0, const FaceBitSet * region = nullptr );

It will give you complete edge loop of one hole in the mesh.

[czc98]

Thanks!