[Dune] [#834] Edge orientation in reference element/cell (Attachment added)

[Dune]

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User who did this - Sebastian Goetschel (sgoetschel) 

Attached to Project - Dune
Summary - Edge orientation in reference element/cell
Task Type - Bug Report
Category - Grid
Status - Unconfirmed
Assigned To - 
Operating System - Unspecified / All
Severity - Low
Priority - Normal
Reported Version - 2.0
Due in Version - Undecided
Due Date - Undecided
Details - When accessing the faces of a triangle in 2d, and getting global coordinates for a given local coordinate, the result for a certain edge is different when using the reference element. The orientation of one of the edges is different than the orientation of the edge in the reference element. That is, geometryInInside().global(local) and referenceElement.global<1>(local,indexInInside(),1) give different results for the same local coordinate on that edge.

The attached example program yields the following output:

[...]
geoInInside.type = (simplex, 1) with corners (0 1), (0 0)
                corners in reference element (0 0), (0 1) 
loc = 0.11   glob = (0 0.89)   in refElem = (0 0.11)

All other edges are oriented as in the element.

When an intersection covers the whole codim 1 subentity, should its geometry in the cell not be the same as specified in the reference element?

One or more files have been attached.

More information can be found at the following URL:
http://www.dune-project.org/flyspray/index.php?do=details&task_id=834

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