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#818 Topological embedding and indices of subentities are missing

Metadata

Property Value
Reported by Carsten Gräser (graeser@math.fu-berlin.de)
Reported at Sep 7, 2010 09:22
Type Feature Request
Version Git (pre2.4) [autotools]
Operating System Unspecified / All
Last edited by Carsten Gräser (graeser@math.fu-berlin.de)
Last edited at Feb 14, 2011 12:05
Closed by Carsten Gräser (graeser@math.fu-berlin.de)
Closed at Feb 14, 2011 12:05
Closed in version Unknown
Resolution Implemented
Comment The subIndex() method has been extended for codim>0 entities.

Description

Currently there is no information on the embedding of subentities available. If you e.g. have an element e you can not get the local index of the i-th vertex of some e.subEntity(j) within e. Furthermore you can not even obtain the index/id of this vertex.

This fact makes the subEntity method of Entity<0> and the iterators and geometries of codim 0<c<dim entities almost useless.

As a first step I propose to add the subIndex/subId method also for codim c>0 entities. Then one could construct the embedding at least by comparing indices/ids.

Furthermore it would be nice to provide the embedding directly similar to the subEntity method of the reference elements.