[ET Trac] [Einstein Toolkit] #1152: Add option to compute center of mass to hydro_analysis and lots of smaller changes

[Einstein Toolkit]

#1152: Add option to compute center of mass to hydro_analysis and lots of smaller
changes
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  Reporter:  rhaas                  |       Owner:                
      Type:  enhancement            |      Status:  review        
  Priority:  minor                  |   Milestone:                
 Component:  EinsteinToolkit thorn  |     Version:                
Resolution:                         |    Keywords:  Hydro_Analysis
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Comment (by eschnett):

 The centre of mass is not {{{rho x^i / M}}}, but rather {{{sqrt(det(g_ij))
 rho x^i / M}}}, where {{{M = sqrt(det(g_ij)) rho}}} (integral signs
 omitted).

 I don't see how myrho is defined in patch 0006, and it's not currently
 defined in Hydro_Analysis either. Maybe myrho = rho sqrt(g)?

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1152#comment:15>
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