Yes it was the version of Triangle in libmesh, I've seen that theres 
something similar for 3D I think, Tetgen right? At the moment I'm happy 
with 2D, since my research is not focused on meshes and space 
adaptivity, nevertheless I can't have hanging nodes.
The code is quite large, theres a lot of stuff around the mesh 
adaptivity, I will try to set up something simple and clear soon and 
share it with you :)
Giacomo


On 04/06/2017 05:36 PM, Roy Stogner wrote:
>
> On Thu, 6 Apr 2017, John Peterson wrote:
>
>>       The algorithm is:
>>            - call save_mesh
>>            - call add_remove_node
>>            - call new_Delaunay_mesh
>>            - call equation_systems.reinit(), which will call 
>> project_vector
>>       and project_on_new_delaunay_mesh.
>>
>>       The most expensive part are the project_on_new_delaunay_mesh and
>>       new_Delaunay_mesh methods, save_mesh is negligible. If you're 
>> interested
>>       I could set up a running example and send it to you.
>>
>>
>> This sounds pretty interesting! I assume you used the version of
>> Triangle that is distributed with libmesh?  Do you have any plans
>> for doing something similar for 3D?
>>
>> If you are willing to share your code that would be great, it might
>> inspire someone else to make it into a more generalized libmesh
>> capability...
>
> Yeah, even if it was just on a separate branch that got mothballed for
> a while, it would be great to have as a reference.  For isotropic
> adaptivity I'm not interested in this algorithm, but this sort of
> thing is the only way I've seen people do *completely* anisotropic
> adaptivity, and I'd love to be able to play with that one day.
> ---
> Roy


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