TP_ConservedVectorNames.h

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#pragma once
 
namespace TP {
namespace Z4VectorShortcuts {
 
const int g11 = 0; 
const int g12 = 1; 
const int g13 = 2;
const int g22 = 3;
const int g23 = 4; 
const int g33 = 5; 
const int K11 = 6; 
const int K12 = 7; 
const int K13 = 8;
const int K22 = 9;
const int K23 = 10; 
const int K33 = 11;   
const int Z1 = 12;
const int Z2 = 13;
const int Z3 = 14;
const int Theta = 15;
const int lapse = 16;
const int shift1 = 17;
const int shift2 = 18;
const int shift3 = 19;
const int b1 = 20;
const int b2 = 21;
const int b3 = 22;
const int A1 = 23;
const int A2 = 24;
const int A3 = 25;
const int B11 = 26;
const int B21 = 27;
const int B31 = 28;
const int B12 = 29;
const int B22 = 30;
const int B32 = 31;
const int B13 = 32;
const int B23 = 33;
const int B33 = 34; 
const int D111 = 35;
const int D112 = 36;
const int D113 = 37;
const int D122 = 38;
const int D123 = 39;
const int D133 = 40;
const int D211 = 41;
const int D212 = 42;
const int D213 = 43;
const int D222 = 44;
const int D223 = 45;
const int D233 = 46;
const int D311 = 47;
const int D312 = 48;
const int D313 = 49;
const int D322 = 50;
const int D323 = 51;
const int D333 = 52; 
const int K0 = 53; 
 
// total length of conserved vector
const int Qlen = 54;
 
/************************** Syntactic sugar (example from SRHD) ********************************/
/************************** Just for placing it somewhere, currently not used ******************/
 
// Method 1: C++ namespaced constants, as present here.
 
// Method 2:
// Labels for indices into Q and V, used only in the local scope. However, the C++ namespace
// allows the same just with a cleaner notation.
/* Usage:
     function foo(double* Q, double* V) {
        DEFINE_LABELS;
        Q[rho] = V[p];
     }
   You can archieve the same when writing
     function foo(double* Q, double* V) {
        using namespace TP::Z4VectorShortcuts;
        Q[rho] = V[p];
     }
*/
 
    
// direct references deep into X  (might be named V, Q, S, whatever)
// Pro: More natural, shorter names for fields
// Contra: Can only be used for one state vector in a scope.
//         Will produce a lot of warnings when -Wunused-but-set-variable warnings is active
/* Usage:
   function foo(double* Q) {
      SHORTHANDS(Q);
      rho = p*p + vx;
   }
*/
 
} // namespace Z4VectorShortcuts
} // namespace TP