[ET Trac] [Einstein Toolkit] #1238: implement buffer mask in CarpetEvolutionMask

[Einstein Toolkit]

#1238: implement buffer mask in CarpetEvolutionMask
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 Reporter:  rhaas                |       Owner:  eschnett
     Type:  enhancement          |      Status:  new     
 Priority:  minor                |   Milestone:          
Component:  Carpet               |     Version:          
 Keywords:  CarpetEvolutionMask  |  
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 the attached patch implements a new integer valued grid function
 carpetevolutionmask::buffer_mask which is set to 1 in buffer regions and 0
 otherwise. It provides a testcase. Eventually I would like to add other
 values such that the number correlates with the last MoL step for which
 this point needs to be valid before MoL_CalcRHS but for which one cannot
 compute a RHS in MoL_CalcRHS.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1238>
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