[ET Trac] [Einstein Toolkit] #1120: CarpetInterp2: New ENO2 interpolator

[Einstein Toolkit]

#1120: CarpetInterp2: New ENO2 interpolator
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 Reporter:  reisswig@…                  |       Owner:  eschnett
     Type:  enhancement                 |      Status:  new     
 Priority:  optional                    |   Milestone:          
Component:  Carpet                      |     Version:          
 Keywords:  CarpetInterp2, eno2         |  
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 The above patch introduces eno2 to CarpetInterp2. It works very similar to
 the the original Lagrange interpolator. The only difference is that the
 new interpolator uses a new class fasterp_eno2_src_loc_t instead of the
 original fasterp_src_loc_t.
 Similar to what is done in fasterp_src_loc_t, fasterp_eno2_src_loc_t
 computes the stencil coefficients and stores them. The interpolation
 algorithm with fasterp_eno2_src_loc_t is adapted for eno2.

 I had to introduce templates to recycle the surrounding code in which
 fasterp_src_loc_t/fasterp_eno2_src_loc_t is used.

 The above patch was tested with a 2-patch and a 7-patch system, a shock
 tube and an excited TOV.
 The necessary changes to Llama/Interpolate2 are contained in a different
 patch.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1120>
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