{"action":"created","issue":{"url":"https://api.github.com/repos/dealii/dealii/issues/2237","repository_url":"https://api.github.com/repos/dealii/dealii","labels_url":"https://api.github.com/repos/dealii/dealii/issues/2237/labels{/name}","comments_url":"https://api.github.com/repos/dealii/dealii/issues/2237/comments","events_url":"https://api.github.com/repos/dealii/dealii/issues/2237/events","html_url":"https://github.com/dealii/dealii/issues/2237","id":135785209,"number":2237,"title":"FE_Bernstein lacks proper get_interpolation_matrix() implementation","user":{"login":"kronbichler","id":8276200,"avatar_url":"https://avatars.githubusercontent.com/u/8276200?v=3","gravatar_id":"","url":"https://api.github.com/users/kronbichler","html_url":"https://github.com/kronbichler","followers_url":"https://api.github.com/users/kronbichler/followers","following_url":"https://api.github.com/users/kronbichler/following{/other_user}","gists_url":"https://api.github.com/users/kronbichler/gists{/gist_id}","starred_url":"https://api.github.com/users/kronbichler/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kronbichler/subscriptions","organizations_url":"https://api.github.com/users/kronbichler/orgs","repos_url":"https://api.github.com/users/kronbichler/repos","events_url":"https://api.github.com/users/kronbichler/events{/privacy}","received_events_url":"https://api.github.com/users/kronbichler/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":8,"created_at":"2016-02-23T16:23:52Z","updated_at":"2016-03-23T12:56:39Z","closed_at":null,"body":"As reported on the mailing list, FE_Bernstein fails to interpolate data between different meshes. The reason for this is that FE_Bernstein::get_interpolation_matrix() is not implemented in the class itself but inherited from FE_Q_Base which in turn access the unit point support points. FE_Bernstein does not define support points afaik, so there is no such data and thus an invalid access is done. The solution would be to create a new get_interpolation_matrix function for FE_Bernstein that uses the correct points for interpolation, similarly to what is done for FE_Bernstein::get_subface_interpolation_matrix. @mtezzele @luca-heltai you wrote the original implementation: Would you mind having a look?"},"comment":{"url":"https://api.github.com/repos/dealii/dealii/issues/comments/200334644","html_url":"https://github.com/dealii/dealii/issues/2237#issuecomment-200334644","issue_url":"https://api.github.com/repos/dealii/dealii/issues/2237","id":200334644,"user":{"login":"luca-heltai","id":2919756,"avatar_url":"https://avatars.githubusercontent.com/u/2919756?v=3","gravatar_id":"","url":"https://api.github.com/users/luca-heltai","html_url":"https://github.com/luca-heltai","followers_url":"https://api.github.com/users/luca-heltai/followers","following_url":"https://api.github.com/users/luca-heltai/following{/other_user}","gists_url":"https://api.github.com/users/luca-heltai/gists{/gist_id}","starred_url":"https://api.github.com/users/luca-heltai/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/luca-heltai/subscriptions","organizations_url":"https://api.github.com/users/luca-heltai/orgs","repos_url":"https://api.github.com/users/luca-heltai/repos","events_url":"https://api.github.com/users/luca-heltai/events{/privacy}","received_events_url":"https://api.github.com/users/luca-heltai/received_events","type":"User","site_admin":false},"created_at":"2016-03-23T12:56:39Z","updated_at":"2016-03-23T12:56:39Z","body":"Yes, I think adding a method that throws an exception is a good starting point. We'll be looking into this at some point, but it is not very high on the priority list right now..."}}