Burgers example: Add generated thorn

12 files changed, 951 insertions, 0 deletions

diff --git a/Examples/Burgers/src/Boundaries.cc b/Examples/Burgers/src/Boundaries.cc
new file mode 100644
index 0000000..b0ba04d
--- /dev/null
+++ b/Examples/Burgers/src/Boundaries.cc
@@ -0,0 +1,145 @@
+/*  File produced by Kranc */
+
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+#include "cctk_Faces.h"
+#include "util_Table.h"
+#include "Symmetry.h"
+
+
+/* the boundary treatment is split into 3 steps:    */
+/* 1. excision                                      */
+/* 2. symmetries                                    */
+/* 3. "other" boundary conditions, e.g. radiative */
+
+/* to simplify scheduling and testing, the 3 steps  */
+/* are currently applied in separate functions      */
+
+
+extern "C" void Burgers_CheckBoundaries(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  return;
+}
+
+extern "C" void Burgers_SelectBoundConds(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  CCTK_INT ierr = 0;
+  
+  if (CCTK_EQUALS(u_group_bound, "none"  ) ||
+      CCTK_EQUALS(u_group_bound, "static") ||
+      CCTK_EQUALS(u_group_bound, "flat"  ) ||
+      CCTK_EQUALS(u_group_bound, "zero"  ) )
+  {
+    ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, 1, -1,
+                      "Burgers::u_group", u_group_bound);
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register u_group_bound BC for Burgers::u_group!");
+  }
+  
+  if (CCTK_EQUALS(u_bound, "none"  ) ||
+      CCTK_EQUALS(u_bound, "static") ||
+      CCTK_EQUALS(u_bound, "flat"  ) ||
+      CCTK_EQUALS(u_bound, "zero"  ) )
+  {
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, -1,
+                      "Burgers::u", u_bound);
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register u_bound BC for Burgers::u!");
+  }
+  
+  if (CCTK_EQUALS(u_group_bound, "radiative"))
+  {
+   /* select radiation boundary condition */
+    static CCTK_INT handle_u_group_bound = -1;
+    if (handle_u_group_bound < 0) handle_u_group_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_u_group_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_u_group_bound , u_group_bound_limit, "LIMIT") < 0)
+       CCTK_WARN(0, "could not set LIMIT value in table!");
+    if (Util_TableSetReal(handle_u_group_bound ,u_group_bound_speed, "SPEED") < 0)
+       CCTK_WARN(0, "could not set SPEED value in table!");
+  
+    ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, 1, handle_u_group_bound, 
+                      "Burgers::u_group", "Radiation");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register Radiation BC for Burgers::u_group!");
+  
+  }
+  
+  if (CCTK_EQUALS(u_bound, "radiative"))
+  {
+   /* select radiation boundary condition */
+    static CCTK_INT handle_u_bound = -1;
+    if (handle_u_bound < 0) handle_u_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_u_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_u_bound , u_bound_limit, "LIMIT") < 0)
+       CCTK_WARN(0, "could not set LIMIT value in table!");
+    if (Util_TableSetReal(handle_u_bound ,u_bound_speed, "SPEED") < 0)
+        CCTK_WARN(0, "could not set SPEED value in table!");
+  
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, handle_u_bound, 
+                      "Burgers::u", "Radiation");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register Radiation BC for Burgers::u!");
+  
+  }
+  
+  if (CCTK_EQUALS(u_group_bound, "scalar"))
+  {
+   /* select scalar boundary condition */
+    static CCTK_INT handle_u_group_bound = -1;
+    if (handle_u_group_bound < 0) handle_u_group_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_u_group_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_u_group_bound ,u_group_bound_scalar, "SCALAR") < 0)
+        CCTK_WARN(0, "could not set SCALAR value in table!");
+  
+    ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, 1, handle_u_group_bound, 
+                      "Burgers::u_group", "scalar");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register Scalar BC for Burgers::u_group!");
+  
+  }
+  
+  if (CCTK_EQUALS(u_bound, "scalar"))
+  {
+   /* select scalar boundary condition */
+    static CCTK_INT handle_u_bound = -1;
+    if (handle_u_bound < 0) handle_u_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_u_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_u_bound ,u_bound_scalar, "SCALAR") < 0)
+      CCTK_WARN(0, "could not set SCALAR value in table!");
+  
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, handle_u_bound, 
+                      "Burgers::u", "scalar");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Error in registering Scalar BC for Burgers::u!");
+  
+  }
+  return;
+}
+
+
+
+/* template for entries in parameter file:
+#$bound$#Burgers::u_group_bound       = "skip"
+#$bound$#Burgers::u_group_bound_speed = 1.0
+#$bound$#Burgers::u_group_bound_limit = 0.0
+#$bound$#Burgers::u_group_bound_scalar = 0.0
+
+#$bound$#Burgers::u_bound       = "skip"
+#$bound$#Burgers::u_bound_speed = 1.0
+#$bound$#Burgers::u_bound_limit = 0.0
+#$bound$#Burgers::u_bound_scalar = 0.0
+
+*/
+
diff --git a/Examples/Burgers/src/Differencing.h b/Examples/Burgers/src/Differencing.h
new file mode 100644
index 0000000..94f5300
--- /dev/null
+++ b/Examples/Burgers/src/Differencing.h
@@ -0,0 +1,12 @@
+#define PDplus1(u) (p1odx*(-(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(1)+dj*(0)+dk*(0)]))
+#define PDplus2(u) (p1ody*(-(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(0)+dj*(1)+dk*(0)]))
+#define PDplus3(u) (p1odz*(-(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(0)+dj*(0)+dk*(1)]))
+#define DiffPlus1(u) (p1o1*(-(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(1)+dj*(0)+dk*(0)]))
+#define DiffPlus2(u) (p1o1*(-(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(0)+dj*(1)+dk*(0)]))
+#define DiffPlus3(u) (p1o1*(-(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(0)+dj*(0)+dk*(1)]))
+#define DiffMinus1(u) (p1o1*((u)[di*(0)+dj*(0)+dk*(0)] - (u)[di*(-1)+dj*(0)+dk*(0)]))
+#define DiffMinus2(u) (p1o1*((u)[di*(0)+dj*(0)+dk*(0)] - (u)[di*(0)+dj*(-1)+dk*(0)]))
+#define DiffMinus3(u) (p1o1*((u)[di*(0)+dj*(0)+dk*(0)] - (u)[di*(0)+dj*(0)+dk*(-1)]))
+#define ShiftMinus1(u) (p1o1*(u)[di*(-1)+dj*(0)+dk*(0)])
+#define ShiftMinus2(u) (p1o1*(u)[di*(0)+dj*(-1)+dk*(0)])
+#define ShiftMinus3(u) (p1o1*(u)[di*(0)+dj*(0)+dk*(-1)])
diff --git a/Examples/Burgers/src/RegisterMoL.cc b/Examples/Burgers/src/RegisterMoL.cc
new file mode 100644
index 0000000..d29d0eb
--- /dev/null
+++ b/Examples/Burgers/src/RegisterMoL.cc
@@ -0,0 +1,17 @@
+/*  File produced by Kranc */
+
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+
+extern "C" void Burgers_RegisterVars(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  CCTK_INT ierr = 0;
+  
+  /* Register all the evolved grid functions with MoL */
+  ierr += MoLRegisterEvolved(CCTK_VarIndex("Burgers::u"),  CCTK_VarIndex("Burgers::urhs"));
+  return;
+}
diff --git a/Examples/Burgers/src/RegisterSymmetries.cc b/Examples/Burgers/src/RegisterSymmetries.cc
new file mode 100644
index 0000000..db6bb0a
--- /dev/null
+++ b/Examples/Burgers/src/RegisterSymmetries.cc
@@ -0,0 +1,39 @@
+/*  File produced by Kranc */
+
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+#include "Symmetry.h"
+
+extern "C" void Burgers_RegisterSymmetries(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  
+  /* array holding symmetry definitions */
+  CCTK_INT sym[3];
+  
+  
+  /* Register symmetries of grid functions */
+  sym[0] = 1;
+  sym[1] = 1;
+  sym[2] = 1;
+  SetCartSymVN(cctkGH, sym, "Burgers::u");
+  
+  sym[0] = 1;
+  sym[1] = 1;
+  sym[2] = 1;
+  SetCartSymVN(cctkGH, sym, "Burgers::uF");
+  
+  sym[0] = 1;
+  sym[1] = 1;
+  sym[2] = 1;
+  SetCartSymVN(cctkGH, sym, "Burgers::uLeft");
+  
+  sym[0] = 1;
+  sym[1] = 1;
+  sym[2] = 1;
+  SetCartSymVN(cctkGH, sym, "Burgers::uR");
+  
+}
diff --git a/Examples/Burgers/src/Startup.cc b/Examples/Burgers/src/Startup.cc
new file mode 100644
index 0000000..f092a5e
--- /dev/null
+++ b/Examples/Burgers/src/Startup.cc
@@ -0,0 +1,10 @@
+/*  File produced by Kranc */
+
+#include "cctk.h"
+
+extern "C" int Burgers_Startup(void)
+{
+  const char * banner = "Burgers";
+  CCTK_RegisterBanner(banner);
+  return 0;
+}
diff --git a/Examples/Burgers/src/burgers_flux_1.cc b/Examples/Burgers/src/burgers_flux_1.cc
new file mode 100644
index 0000000..827bbd6
--- /dev/null
+++ b/Examples/Burgers/src/burgers_flux_1.cc
@@ -0,0 +1,127 @@
+/*  File produced by Kranc */
+
+#define KRANC_C
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+#include "GenericFD.h"
+#include "Differencing.h"
+
+/* Define macros used in calculations */
+#define INITVALUE (42)
+#define QAD(x) (SQR(SQR(x)))
+#define INV(x) ((1.0) / (x))
+#define SQR(x) ((x) * (x))
+#define CUB(x) ((x) * (x) * (x))
+
+extern "C" void burgers_flux_1_SelectBCs(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  CCTK_INT ierr = 0;
+  ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, GenericFD_GetBoundaryWidth(cctkGH), -1 /* no table */, "Burgers::uF_group","flat");
+  if (ierr < 0)
+    CCTK_WARN(1, "Failed to register flat BC for Burgers::uF_group.");
+  return;
+}
+
+static void burgers_flux_1_Body(cGH const * restrict const cctkGH, int const dir, int const face, CCTK_REAL const normal[3], CCTK_REAL const tangentA[3], CCTK_REAL const tangentB[3], int const min[3], int const max[3], int const n_subblock_gfs, CCTK_REAL * restrict const subblock_gfs[])
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  
+  /* Declare the variables used for looping over grid points */
+  CCTK_INT i, j, k;
+  // CCTK_INT index = INITVALUE;
+  
+  /* Declare finite differencing variables */
+  
+  if (verbose > 1)
+  {
+    CCTK_VInfo(CCTK_THORNSTRING,"Entering burgers_flux_1_Body");
+  }
+  
+  if (cctk_iteration % burgers_flux_1_calc_every != burgers_flux_1_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"Burgers::uF_group","Burgers::uLeft_group","Burgers::uR_group"};
+  GenericFD_AssertGroupStorage(cctkGH, "burgers_flux_1", 3, groups);
+  
+  GenericFD_EnsureStencilFits(cctkGH, "burgers_flux_1", 1, 1, 1);
+  
+  /* Include user-supplied include files */
+  
+  /* Initialise finite differencing variables */
+  ptrdiff_t const di = 1;
+  ptrdiff_t const dj = CCTK_GFINDEX3D(cctkGH,0,1,0) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  ptrdiff_t const dk = CCTK_GFINDEX3D(cctkGH,0,0,1) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  CCTK_REAL const dx = ToReal(CCTK_DELTA_SPACE(0));
+  CCTK_REAL const dy = ToReal(CCTK_DELTA_SPACE(1));
+  CCTK_REAL const dz = ToReal(CCTK_DELTA_SPACE(2));
+  CCTK_REAL const dt = ToReal(CCTK_DELTA_TIME);
+  CCTK_REAL const dxi = INV(dx);
+  CCTK_REAL const dyi = INV(dy);
+  CCTK_REAL const dzi = INV(dz);
+  CCTK_REAL const khalf = 0.5;
+  CCTK_REAL const kthird = 1/3.0;
+  CCTK_REAL const ktwothird = 2.0/3.0;
+  CCTK_REAL const kfourthird = 4.0/3.0;
+  CCTK_REAL const keightthird = 8.0/3.0;
+  CCTK_REAL const hdxi = 0.5 * dxi;
+  CCTK_REAL const hdyi = 0.5 * dyi;
+  CCTK_REAL const hdzi = 0.5 * dzi;
+  
+  /* Initialize predefined quantities */
+  CCTK_REAL const p1o1 = 1;
+  CCTK_REAL const p1odx = INV(dx);
+  CCTK_REAL const p1ody = INV(dy);
+  CCTK_REAL const p1odz = INV(dz);
+  
+  /* Loop over the grid points */
+  for (k = min[2]; k < max[2]; k++)
+  {
+    for (j = min[1]; j < max[1]; j++)
+    {
+      for (i = min[0]; i < max[0]; i++)
+      {
+         int  const  index  =  CCTK_GFINDEX3D(cctkGH,i,j,k) ;
+        
+        /* Assign local copies of grid functions */
+        
+        CCTK_REAL uLeftL = uLeft[index];
+        CCTK_REAL uRL = uR[index];
+        
+        
+        /* Include user supplied include files */
+        
+        /* Precompute derivatives */
+        CCTK_REAL const ShiftMinus1uR = ShiftMinus1(&uR[index]);
+        
+        /* Calculate temporaries and grid functions */
+        CCTK_REAL uFL = 0.25*(SQR(ShiftMinus1uR) + uLeftL*(uLeftL - 
+          2*ToReal(alpha)) + 2*ShiftMinus1uR*ToReal(alpha));
+        
+        /* Copy local copies back to grid functions */
+        uF[index] = uFL;
+      }
+    }
+  }
+}
+
+extern "C" void burgers_flux_1(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverInterior(cctkGH, &burgers_flux_1_Body);
+}
diff --git a/Examples/Burgers/src/burgers_initial_shock.cc b/Examples/Burgers/src/burgers_initial_shock.cc
new file mode 100644
index 0000000..a0c5b6e
--- /dev/null
+++ b/Examples/Burgers/src/burgers_initial_shock.cc
@@ -0,0 +1,112 @@
+/*  File produced by Kranc */
+
+#define KRANC_C
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+#include "GenericFD.h"
+#include "Differencing.h"
+
+/* Define macros used in calculations */
+#define INITVALUE (42)
+#define QAD(x) (SQR(SQR(x)))
+#define INV(x) ((1.0) / (x))
+#define SQR(x) ((x) * (x))
+#define CUB(x) ((x) * (x) * (x))
+
+static void burgers_initial_shock_Body(cGH const * restrict const cctkGH, int const dir, int const face, CCTK_REAL const normal[3], CCTK_REAL const tangentA[3], CCTK_REAL const tangentB[3], int const min[3], int const max[3], int const n_subblock_gfs, CCTK_REAL * restrict const subblock_gfs[])
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  
+  /* Declare the variables used for looping over grid points */
+  CCTK_INT i, j, k;
+  // CCTK_INT index = INITVALUE;
+  
+  /* Declare finite differencing variables */
+  
+  if (verbose > 1)
+  {
+    CCTK_VInfo(CCTK_THORNSTRING,"Entering burgers_initial_shock_Body");
+  }
+  
+  if (cctk_iteration % burgers_initial_shock_calc_every != burgers_initial_shock_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"grid::coordinates","Burgers::u_group"};
+  GenericFD_AssertGroupStorage(cctkGH, "burgers_initial_shock", 2, groups);
+  
+  
+  /* Include user-supplied include files */
+  
+  /* Initialise finite differencing variables */
+  ptrdiff_t const di = 1;
+  ptrdiff_t const dj = CCTK_GFINDEX3D(cctkGH,0,1,0) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  ptrdiff_t const dk = CCTK_GFINDEX3D(cctkGH,0,0,1) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  CCTK_REAL const dx = ToReal(CCTK_DELTA_SPACE(0));
+  CCTK_REAL const dy = ToReal(CCTK_DELTA_SPACE(1));
+  CCTK_REAL const dz = ToReal(CCTK_DELTA_SPACE(2));
+  CCTK_REAL const dt = ToReal(CCTK_DELTA_TIME);
+  CCTK_REAL const dxi = INV(dx);
+  CCTK_REAL const dyi = INV(dy);
+  CCTK_REAL const dzi = INV(dz);
+  CCTK_REAL const khalf = 0.5;
+  CCTK_REAL const kthird = 1/3.0;
+  CCTK_REAL const ktwothird = 2.0/3.0;
+  CCTK_REAL const kfourthird = 4.0/3.0;
+  CCTK_REAL const keightthird = 8.0/3.0;
+  CCTK_REAL const hdxi = 0.5 * dxi;
+  CCTK_REAL const hdyi = 0.5 * dyi;
+  CCTK_REAL const hdzi = 0.5 * dzi;
+  
+  /* Initialize predefined quantities */
+  CCTK_REAL const p1o1 = 1;
+  CCTK_REAL const p1odx = INV(dx);
+  CCTK_REAL const p1ody = INV(dy);
+  CCTK_REAL const p1odz = INV(dz);
+  
+  /* Loop over the grid points */
+  for (k = min[2]; k < max[2]; k++)
+  {
+    for (j = min[1]; j < max[1]; j++)
+    {
+      for (i = min[0]; i < max[0]; i++)
+      {
+         int  const  index  =  CCTK_GFINDEX3D(cctkGH,i,j,k) ;
+        
+        /* Assign local copies of grid functions */
+        
+        CCTK_REAL xL = x[index];
+        
+        
+        /* Include user supplied include files */
+        
+        /* Precompute derivatives */
+        
+        /* Calculate temporaries and grid functions */
+        CCTK_REAL uL = Piecewise(List(List(ToReal(uL0),xL < 0.5)),0. + 
+          ToReal(uR0));
+        
+        /* Copy local copies back to grid functions */
+        u[index] = uL;
+      }
+    }
+  }
+}
+
+extern "C" void burgers_initial_shock(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverEverything(cctkGH, &burgers_initial_shock_Body);
+}
diff --git a/Examples/Burgers/src/burgers_initial_sine.cc b/Examples/Burgers/src/burgers_initial_sine.cc
new file mode 100644
index 0000000..2cc003f
--- /dev/null
+++ b/Examples/Burgers/src/burgers_initial_sine.cc
@@ -0,0 +1,111 @@
+/*  File produced by Kranc */
+
+#define KRANC_C
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+#include "GenericFD.h"
+#include "Differencing.h"
+
+/* Define macros used in calculations */
+#define INITVALUE (42)
+#define QAD(x) (SQR(SQR(x)))
+#define INV(x) ((1.0) / (x))
+#define SQR(x) ((x) * (x))
+#define CUB(x) ((x) * (x) * (x))
+
+static void burgers_initial_sine_Body(cGH const * restrict const cctkGH, int const dir, int const face, CCTK_REAL const normal[3], CCTK_REAL const tangentA[3], CCTK_REAL const tangentB[3], int const min[3], int const max[3], int const n_subblock_gfs, CCTK_REAL * restrict const subblock_gfs[])
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  
+  /* Declare the variables used for looping over grid points */
+  CCTK_INT i, j, k;
+  // CCTK_INT index = INITVALUE;
+  
+  /* Declare finite differencing variables */
+  
+  if (verbose > 1)
+  {
+    CCTK_VInfo(CCTK_THORNSTRING,"Entering burgers_initial_sine_Body");
+  }
+  
+  if (cctk_iteration % burgers_initial_sine_calc_every != burgers_initial_sine_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"grid::coordinates","Burgers::u_group"};
+  GenericFD_AssertGroupStorage(cctkGH, "burgers_initial_sine", 2, groups);
+  
+  
+  /* Include user-supplied include files */
+  
+  /* Initialise finite differencing variables */
+  ptrdiff_t const di = 1;
+  ptrdiff_t const dj = CCTK_GFINDEX3D(cctkGH,0,1,0) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  ptrdiff_t const dk = CCTK_GFINDEX3D(cctkGH,0,0,1) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  CCTK_REAL const dx = ToReal(CCTK_DELTA_SPACE(0));
+  CCTK_REAL const dy = ToReal(CCTK_DELTA_SPACE(1));
+  CCTK_REAL const dz = ToReal(CCTK_DELTA_SPACE(2));
+  CCTK_REAL const dt = ToReal(CCTK_DELTA_TIME);
+  CCTK_REAL const dxi = INV(dx);
+  CCTK_REAL const dyi = INV(dy);
+  CCTK_REAL const dzi = INV(dz);
+  CCTK_REAL const khalf = 0.5;
+  CCTK_REAL const kthird = 1/3.0;
+  CCTK_REAL const ktwothird = 2.0/3.0;
+  CCTK_REAL const kfourthird = 4.0/3.0;
+  CCTK_REAL const keightthird = 8.0/3.0;
+  CCTK_REAL const hdxi = 0.5 * dxi;
+  CCTK_REAL const hdyi = 0.5 * dyi;
+  CCTK_REAL const hdzi = 0.5 * dzi;
+  
+  /* Initialize predefined quantities */
+  CCTK_REAL const p1o1 = 1;
+  CCTK_REAL const p1odx = INV(dx);
+  CCTK_REAL const p1ody = INV(dy);
+  CCTK_REAL const p1odz = INV(dz);
+  
+  /* Loop over the grid points */
+  for (k = min[2]; k < max[2]; k++)
+  {
+    for (j = min[1]; j < max[1]; j++)
+    {
+      for (i = min[0]; i < max[0]; i++)
+      {
+         int  const  index  =  CCTK_GFINDEX3D(cctkGH,i,j,k) ;
+        
+        /* Assign local copies of grid functions */
+        
+        CCTK_REAL xL = x[index];
+        
+        
+        /* Include user supplied include files */
+        
+        /* Precompute derivatives */
+        
+        /* Calculate temporaries and grid functions */
+        CCTK_REAL uL = 1 + Sin(2*Pi*xL)*ToReal(amp);
+        
+        /* Copy local copies back to grid functions */
+        u[index] = uL;
+      }
+    }
+  }
+}
+
+extern "C" void burgers_initial_sine(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverEverything(cctkGH, &burgers_initial_sine_Body);
+}
diff --git a/Examples/Burgers/src/burgers_reconstruct_1.cc b/Examples/Burgers/src/burgers_reconstruct_1.cc
new file mode 100644
index 0000000..59622d8
--- /dev/null
+++ b/Examples/Burgers/src/burgers_reconstruct_1.cc
@@ -0,0 +1,139 @@
+/*  File produced by Kranc */
+
+#define KRANC_C
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+#include "GenericFD.h"
+#include "Differencing.h"
+
+/* Define macros used in calculations */
+#define INITVALUE (42)
+#define QAD(x) (SQR(SQR(x)))
+#define INV(x) ((1.0) / (x))
+#define SQR(x) ((x) * (x))
+#define CUB(x) ((x) * (x) * (x))
+
+extern "C" void burgers_reconstruct_1_SelectBCs(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  CCTK_INT ierr = 0;
+  ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, GenericFD_GetBoundaryWidth(cctkGH), -1 /* no table */, "Burgers::uLeft_group","flat");
+  if (ierr < 0)
+    CCTK_WARN(1, "Failed to register flat BC for Burgers::uLeft_group.");
+  ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, GenericFD_GetBoundaryWidth(cctkGH), -1 /* no table */, "Burgers::uR_group","flat");
+  if (ierr < 0)
+    CCTK_WARN(1, "Failed to register flat BC for Burgers::uR_group.");
+  return;
+}
+
+static void burgers_reconstruct_1_Body(cGH const * restrict const cctkGH, int const dir, int const face, CCTK_REAL const normal[3], CCTK_REAL const tangentA[3], CCTK_REAL const tangentB[3], int const min[3], int const max[3], int const n_subblock_gfs, CCTK_REAL * restrict const subblock_gfs[])
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  
+  /* Declare the variables used for looping over grid points */
+  CCTK_INT i, j, k;
+  // CCTK_INT index = INITVALUE;
+  
+  /* Declare finite differencing variables */
+  
+  if (verbose > 1)
+  {
+    CCTK_VInfo(CCTK_THORNSTRING,"Entering burgers_reconstruct_1_Body");
+  }
+  
+  if (cctk_iteration % burgers_reconstruct_1_calc_every != burgers_reconstruct_1_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"Burgers::u_group","Burgers::uLeft_group","Burgers::uR_group"};
+  GenericFD_AssertGroupStorage(cctkGH, "burgers_reconstruct_1", 3, groups);
+  
+  GenericFD_EnsureStencilFits(cctkGH, "burgers_reconstruct_1", 1, 1, 1);
+  
+  /* Include user-supplied include files */
+  
+  /* Initialise finite differencing variables */
+  ptrdiff_t const di = 1;
+  ptrdiff_t const dj = CCTK_GFINDEX3D(cctkGH,0,1,0) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  ptrdiff_t const dk = CCTK_GFINDEX3D(cctkGH,0,0,1) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  CCTK_REAL const dx = ToReal(CCTK_DELTA_SPACE(0));
+  CCTK_REAL const dy = ToReal(CCTK_DELTA_SPACE(1));
+  CCTK_REAL const dz = ToReal(CCTK_DELTA_SPACE(2));
+  CCTK_REAL const dt = ToReal(CCTK_DELTA_TIME);
+  CCTK_REAL const dxi = INV(dx);
+  CCTK_REAL const dyi = INV(dy);
+  CCTK_REAL const dzi = INV(dz);
+  CCTK_REAL const khalf = 0.5;
+  CCTK_REAL const kthird = 1/3.0;
+  CCTK_REAL const ktwothird = 2.0/3.0;
+  CCTK_REAL const kfourthird = 4.0/3.0;
+  CCTK_REAL const keightthird = 8.0/3.0;
+  CCTK_REAL const hdxi = 0.5 * dxi;
+  CCTK_REAL const hdyi = 0.5 * dyi;
+  CCTK_REAL const hdzi = 0.5 * dzi;
+  
+  /* Initialize predefined quantities */
+  CCTK_REAL const p1o1 = 1;
+  CCTK_REAL const p1odx = INV(dx);
+  CCTK_REAL const p1ody = INV(dy);
+  CCTK_REAL const p1odz = INV(dz);
+  
+  /* Loop over the grid points */
+  for (k = min[2]; k < max[2]; k++)
+  {
+    for (j = min[1]; j < max[1]; j++)
+    {
+      for (i = min[0]; i < max[0]; i++)
+      {
+         int  const  index  =  CCTK_GFINDEX3D(cctkGH,i,j,k) ;
+        
+        /* Assign local copies of grid functions */
+        
+        CCTK_REAL uL = u[index];
+        
+        
+        /* Include user supplied include files */
+        
+        /* Precompute derivatives */
+        CCTK_REAL const DiffPlus1u = DiffPlus1(&u[index]);
+        CCTK_REAL const DiffMinus1u = DiffMinus1(&u[index]);
+        
+        /* Calculate temporaries and grid functions */
+        CCTK_REAL slopeL = DiffMinus1u;
+        
+        CCTK_REAL slopeR = DiffPlus1u;
+        
+        CCTK_REAL slope = IfThen(slopeL*slopeR < 0,0,IfThen(Abs(slopeL) < 
+          Abs(slopeR),slopeL,slopeR));
+        
+        CCTK_REAL uLeftL = -0.5*slope + uL;
+        
+        CCTK_REAL uRL = 0.5*slope + uL;
+        
+        /* Copy local copies back to grid functions */
+        uLeft[index] = uLeftL;
+        uR[index] = uRL;
+      }
+    }
+  }
+}
+
+extern "C" void burgers_reconstruct_1(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverInterior(cctkGH, &burgers_reconstruct_1_Body);
+}
diff --git a/Examples/Burgers/src/burgers_rhs_1.cc b/Examples/Burgers/src/burgers_rhs_1.cc
new file mode 100644
index 0000000..375ad35
--- /dev/null
+++ b/Examples/Burgers/src/burgers_rhs_1.cc
@@ -0,0 +1,126 @@
+/*  File produced by Kranc */
+
+#define KRANC_C
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+#include "GenericFD.h"
+#include "Differencing.h"
+
+/* Define macros used in calculations */
+#define INITVALUE (42)
+#define QAD(x) (SQR(SQR(x)))
+#define INV(x) ((1.0) / (x))
+#define SQR(x) ((x) * (x))
+#define CUB(x) ((x) * (x) * (x))
+
+extern "C" void burgers_rhs_1_SelectBCs(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  CCTK_INT ierr = 0;
+  ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, GenericFD_GetBoundaryWidth(cctkGH), -1 /* no table */, "Burgers::u_grouprhs","flat");
+  if (ierr < 0)
+    CCTK_WARN(1, "Failed to register flat BC for Burgers::u_grouprhs.");
+  return;
+}
+
+static void burgers_rhs_1_Body(cGH const * restrict const cctkGH, int const dir, int const face, CCTK_REAL const normal[3], CCTK_REAL const tangentA[3], CCTK_REAL const tangentB[3], int const min[3], int const max[3], int const n_subblock_gfs, CCTK_REAL * restrict const subblock_gfs[])
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  
+  /* Declare the variables used for looping over grid points */
+  CCTK_INT i, j, k;
+  // CCTK_INT index = INITVALUE;
+  
+  /* Declare finite differencing variables */
+  
+  if (verbose > 1)
+  {
+    CCTK_VInfo(CCTK_THORNSTRING,"Entering burgers_rhs_1_Body");
+  }
+  
+  if (cctk_iteration % burgers_rhs_1_calc_every != burgers_rhs_1_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"Burgers::uF_group","Burgers::u_grouprhs"};
+  GenericFD_AssertGroupStorage(cctkGH, "burgers_rhs_1", 2, groups);
+  
+  GenericFD_EnsureStencilFits(cctkGH, "burgers_rhs_1", 1, 1, 1);
+  
+  /* Include user-supplied include files */
+  
+  /* Initialise finite differencing variables */
+  ptrdiff_t const di = 1;
+  ptrdiff_t const dj = CCTK_GFINDEX3D(cctkGH,0,1,0) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  ptrdiff_t const dk = CCTK_GFINDEX3D(cctkGH,0,0,1) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  CCTK_REAL const dx = ToReal(CCTK_DELTA_SPACE(0));
+  CCTK_REAL const dy = ToReal(CCTK_DELTA_SPACE(1));
+  CCTK_REAL const dz = ToReal(CCTK_DELTA_SPACE(2));
+  CCTK_REAL const dt = ToReal(CCTK_DELTA_TIME);
+  CCTK_REAL const dxi = INV(dx);
+  CCTK_REAL const dyi = INV(dy);
+  CCTK_REAL const dzi = INV(dz);
+  CCTK_REAL const khalf = 0.5;
+  CCTK_REAL const kthird = 1/3.0;
+  CCTK_REAL const ktwothird = 2.0/3.0;
+  CCTK_REAL const kfourthird = 4.0/3.0;
+  CCTK_REAL const keightthird = 8.0/3.0;
+  CCTK_REAL const hdxi = 0.5 * dxi;
+  CCTK_REAL const hdyi = 0.5 * dyi;
+  CCTK_REAL const hdzi = 0.5 * dzi;
+  
+  /* Initialize predefined quantities */
+  CCTK_REAL const p1o1 = 1;
+  CCTK_REAL const p1odx = INV(dx);
+  CCTK_REAL const p1ody = INV(dy);
+  CCTK_REAL const p1odz = INV(dz);
+  
+  /* Loop over the grid points */
+  for (k = min[2]; k < max[2]; k++)
+  {
+    for (j = min[1]; j < max[1]; j++)
+    {
+      for (i = min[0]; i < max[0]; i++)
+      {
+         int  const  index  =  CCTK_GFINDEX3D(cctkGH,i,j,k) ;
+        
+        /* Assign local copies of grid functions */
+        
+        CCTK_REAL uFL = uF[index];
+        CCTK_REAL urhsL = urhs[index];
+        
+        
+        /* Include user supplied include files */
+        
+        /* Precompute derivatives */
+        CCTK_REAL const PDplus1uF = PDplus1(&uF[index]);
+        
+        /* Calculate temporaries and grid functions */
+        urhsL = -PDplus1uF + urhsL;
+        
+        /* Copy local copies back to grid functions */
+        urhs[index] = urhsL;
+      }
+    }
+  }
+}
+
+extern "C" void burgers_rhs_1(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverInterior(cctkGH, &burgers_rhs_1_Body);
+}
diff --git a/Examples/Burgers/src/burgers_zero_rhs.cc b/Examples/Burgers/src/burgers_zero_rhs.cc
new file mode 100644
index 0000000..538d321
--- /dev/null
+++ b/Examples/Burgers/src/burgers_zero_rhs.cc
@@ -0,0 +1,110 @@
+/*  File produced by Kranc */
+
+#define KRANC_C
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+#include "GenericFD.h"
+#include "Differencing.h"
+
+/* Define macros used in calculations */
+#define INITVALUE (42)
+#define QAD(x) (SQR(SQR(x)))
+#define INV(x) ((1.0) / (x))
+#define SQR(x) ((x) * (x))
+#define CUB(x) ((x) * (x) * (x))
+
+static void burgers_zero_rhs_Body(cGH const * restrict const cctkGH, int const dir, int const face, CCTK_REAL const normal[3], CCTK_REAL const tangentA[3], CCTK_REAL const tangentB[3], int const min[3], int const max[3], int const n_subblock_gfs, CCTK_REAL * restrict const subblock_gfs[])
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  
+  /* Declare the variables used for looping over grid points */
+  CCTK_INT i, j, k;
+  // CCTK_INT index = INITVALUE;
+  
+  /* Declare finite differencing variables */
+  
+  if (verbose > 1)
+  {
+    CCTK_VInfo(CCTK_THORNSTRING,"Entering burgers_zero_rhs_Body");
+  }
+  
+  if (cctk_iteration % burgers_zero_rhs_calc_every != burgers_zero_rhs_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"Burgers::u_grouprhs"};
+  GenericFD_AssertGroupStorage(cctkGH, "burgers_zero_rhs", 1, groups);
+  
+  
+  /* Include user-supplied include files */
+  
+  /* Initialise finite differencing variables */
+  ptrdiff_t const di = 1;
+  ptrdiff_t const dj = CCTK_GFINDEX3D(cctkGH,0,1,0) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  ptrdiff_t const dk = CCTK_GFINDEX3D(cctkGH,0,0,1) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  CCTK_REAL const dx = ToReal(CCTK_DELTA_SPACE(0));
+  CCTK_REAL const dy = ToReal(CCTK_DELTA_SPACE(1));
+  CCTK_REAL const dz = ToReal(CCTK_DELTA_SPACE(2));
+  CCTK_REAL const dt = ToReal(CCTK_DELTA_TIME);
+  CCTK_REAL const dxi = INV(dx);
+  CCTK_REAL const dyi = INV(dy);
+  CCTK_REAL const dzi = INV(dz);
+  CCTK_REAL const khalf = 0.5;
+  CCTK_REAL const kthird = 1/3.0;
+  CCTK_REAL const ktwothird = 2.0/3.0;
+  CCTK_REAL const kfourthird = 4.0/3.0;
+  CCTK_REAL const keightthird = 8.0/3.0;
+  CCTK_REAL const hdxi = 0.5 * dxi;
+  CCTK_REAL const hdyi = 0.5 * dyi;
+  CCTK_REAL const hdzi = 0.5 * dzi;
+  
+  /* Initialize predefined quantities */
+  CCTK_REAL const p1o1 = 1;
+  CCTK_REAL const p1odx = INV(dx);
+  CCTK_REAL const p1ody = INV(dy);
+  CCTK_REAL const p1odz = INV(dz);
+  
+  /* Loop over the grid points */
+  for (k = min[2]; k < max[2]; k++)
+  {
+    for (j = min[1]; j < max[1]; j++)
+    {
+      for (i = min[0]; i < max[0]; i++)
+      {
+         int  const  index  =  CCTK_GFINDEX3D(cctkGH,i,j,k) ;
+        
+        /* Assign local copies of grid functions */
+        
+        
+        
+        /* Include user supplied include files */
+        
+        /* Precompute derivatives */
+        
+        /* Calculate temporaries and grid functions */
+        CCTK_REAL urhsL = 0;
+        
+        /* Copy local copies back to grid functions */
+        urhs[index] = urhsL;
+      }
+    }
+  }
+}
+
+extern "C" void burgers_zero_rhs(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverEverything(cctkGH, &burgers_zero_rhs_Body);
+}
diff --git a/Examples/Burgers/src/make.code.defn b/Examples/Burgers/src/make.code.defn
new file mode 100644
index 0000000..cfdb103
--- /dev/null
+++ b/Examples/Burgers/src/make.code.defn
@@ -0,0 +1,3 @@
+# File produced by Kranc
+
+SRCS = Startup.cc RegisterMoL.cc RegisterSymmetries.cc burgers_initial_sine.cc burgers_initial_shock.cc burgers_zero_rhs.cc burgers_reconstruct_1.cc burgers_flux_1.cc burgers_rhs_1.cc Boundaries.cc