Mesh editing delaunay refinement

[JanCaha]

Description

This adds optional setting for adding Mesh Vertex in Face. This allows to refine triangular Faces in neighborhood of the face that had the vertex added. Edges of those faces are checked if they satisfy Delaunay condition and if the not the edge is flipped.

UI:

Usage:

[github-actions]

🪟 Windows builds

Download Windows builds of this PR for testing.
Debug symbols for this build are available here.
(Built from commit a7ec33d)

🪟 Windows Qt6 builds

Download Windows Qt6 builds of this PR for testing.
(Built from commit a7ec33d)

[github-actions]

The QGIS project highly values your contribution and would love to see this work merged! Unfortunately this PR has not had any activity in the last 14 days and is being automatically marked as "stale". If you think this pull request should be merged, please check

• that all unit tests are passing

• that all comments by reviewers have been addressed

• that there is enough information for reviewers, in particular

  • link to any issues which this pull request fixes

  • add a description of workflows which this pull request fixes

  • add screenshots if applicable

• that you have written unit tests where possible
  In case you should have any uncertainty, please leave a comment and we will be happy to help you proceed with this pull request.
  If there is no further activity on this pull request, it will be closed in a week.

[uclaros]

Nice addition!
Just a few comments here and there :)

[qgis-bot]

@JanCaha

This pull request has been tagged for the changelog.

• The description will be harvested so please provide a "nearly-ready" text for the final changelog
• If possible, add a nice illustration of the feature. Only the first one in the description will be harvested (GIF accepted as well)
• If you can, it's better to give credits to your sponsor, see below for different formats.

You can edit the description.

Format available for credits

• Funded by NAME
• Funded by URL
• Funded by NAME URL
• Sponsored by NAME
• Sponsored by URL
• Sponsored by NAME URL

Thank you!

[qgis-bot]

@JanCaha
This pull request has been tagged as requiring documentation.

A documentation ticket will be opened at https://github.com/qgis/QGIS-Documentation when this PR is merged.

Please update the description (not the comments) with helpful description and screenshot to help the work from documentors.
Also, any commit having [needs-doc] or [Needs Documentation] in will see its message pushed to the issue, so please be as verbose as you can.

Thank you!

[uclaros]

Could you also add a couple of screenshots for the new UI and new expected behavior?

[JanCaha]

@uclaros

Would the added images work?

[qgis-bot]

@JanCaha
A documentation ticket has been opened at qgis/QGIS-Documentation#9533
It is your responsibility to visit this ticket and add as much detail as possible for the documentation team to correctly document this change.
Thank you!