{"action":"closed","issue":{"url":"https://api.github.com/repos/firedrakeproject/firedrake/issues/429","labels_url":"https://api.github.com/repos/firedrakeproject/firedrake/issues/429/labels{/name}","comments_url":"https://api.github.com/repos/firedrakeproject/firedrake/issues/429/comments","events_url":"https://api.github.com/repos/firedrakeproject/firedrake/issues/429/events","html_url":"https://github.com/firedrakeproject/firedrake/issues/429","id":54108683,"number":429,"title":"Separation of concerns between Mesh and FunctionSpace","user":{"login":"miklos1","id":4210841,"avatar_url":"https://avatars.githubusercontent.com/u/4210841?v=3","gravatar_id":"","url":"https://api.github.com/users/miklos1","html_url":"https://github.com/miklos1","followers_url":"https://api.github.com/users/miklos1/followers","following_url":"https://api.github.com/users/miklos1/following{/other_user}","gists_url":"https://api.github.com/users/miklos1/gists{/gist_id}","starred_url":"https://api.github.com/users/miklos1/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/miklos1/subscriptions","organizations_url":"https://api.github.com/users/miklos1/orgs","repos_url":"https://api.github.com/users/miklos1/repos","events_url":"https://api.github.com/users/miklos1/events{/privacy}","received_events_url":"https://api.github.com/users/miklos1/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/firedrakeproject/firedrake/labels/enhancement","name":"enhancement","color":"84b6eb"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":6,"created_at":"2015-01-12T21:23:49Z","updated_at":"2015-01-26T10:41:20Z","closed_at":"2015-01-26T10:41:20Z","body":"Problems:\r\n\r\n1. Mesh* creates closure ordering using a FunctionSpace-dependent global section. This does not lead to bugs, since FunctionSpace-dependent section always fulfils the requirements of the closure ordering algorithm. However, it introduces an artificial dependence on FunctionSpace, when closure ordering could be self-contained.\r\n2. The above dependence is _hidden_ via the default section of the DMPlex object.**\r\n\r\n--\r\n\r\n*Currently, simplex meshes only, however quadrilateral meshes will soon use the same thing. Extruded meshes have no own cell closure, they use the cell closure of the base mesh.\r\n\r\n**This was, in fact, my fault, due to partial understanding of the situation at the time, when I removed another artificial dependence, that the number of topological mesh entities per cell were calculated from the FunctionSpace dependent FIAT element."}}