[ET Trac] [Einstein Toolkit] #181: AEILocalInterp should not off-centre the interpolation stencil by default

[Einstein Toolkit]

#181: AEILocalInterp should not off-centre the interpolation stencil by default
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  Reporter:  hinder  |       Owner:                
      Type:  defect  |      Status:  confirmed     
  Priority:  major   |   Milestone:                
 Component:  Cactus  |     Version:                
Resolution:          |    Keywords:  AEILocalInterp
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Comment (by knarf):

 Replying to [comment:9 eschnett]:
 > Let's assume you have 10 points on your grid, and your domain is [0; 1).
 Your points' coordinates are thus [0.0, ..., 0.9]. If you try to
 interpolate at 0.95, then this is fine, as it's inside the domain.
 However, all AEILocalInterp sees is that it has grid points in the range
 [0.0; 0.9], and it will thus complain.

 Why should it complain? With 3 symmetry points, the actual grid should go
 from -0.3 ... 1.2 (1.3?), and with an interpolation stencil of 2 (0.2) in
 each direction, shouldn't 0.95 be fine? Why should AEILocalInterp care
 about the size of the evolved grid, and not only on the size of the grid
 it has to interpolate on?

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/181#comment:10>
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