boundary point type and boundary elements for Python version

[shuoli-code]

Hi,

I was using OceanMesh in Python language. I can not get the boundary point type and elements on boundary may be deleted. I saw this was updated in Matlab version and was wondering if this was also integrated into Python version.

Thank you.

Regards,
Shaun

[krober10nd]

Hi, could you elaborate on what you mean by "boundary point type and elements on boundary"? Are you experiencing some problem with the removal of boundary elements when applying the mesh clean algorithm?

[shuoli-code]

Thanks for the reply.

"boundary point type and elements on boundary", for example, after generating a mesh, I need land boundary point (could be identified as type '1') and ocean point (could be type of '0'). Same for elements at the land-ocean boundary. But I can't obtain these information from python version of Oceanmesh. There are only points and elements in the mesh. I was wondering if we have the function to identify boundary points and elements?

[krober10nd]

Ah I see. There's functionality to do that but it's somewhat unfinished.

https://github.com/CHLNDDEV/oceanmesh/pull/72/files#diff-d9988dcdee1ecfb66deaa6efa57c407925aa8620879205ef89b527fdd82d1040R118

[krober10nd]

To just get the boundary edges you'd use

boundary.get_winded_boundary_edges

[shuoli-code]

Ah I see. There's functionality to do that but it's somewhat unfinished.

https://github.com/CHLNDDEV/oceanmesh/pull/72/files#diff-d9988dcdee1ecfb66deaa6efa57c407925aa8620879205ef89b527fdd82d1040R118

Thanks, I'll try it. Hopefully it could be finished soon.

[krober10nd]

I can try to help out with that. Please provide an example mesh with bathymetry interpolated, if you can.

[krober10nd]

@shuoli-code I've cleaned it up a bit. I tested identify_ocean_boundary_sections, identify_land_boundary_sections, identify_island_boundary_sections and appeared to correctly identify mainland, ocean and island boundaries' start and end nodes. Just make sure the bathymetry is negative underwater and positive above.