Advect example: Add generated thorn

14 files changed, 1195 insertions, 0 deletions

diff --git a/Examples/Advect/configuration.ccl b/Examples/Advect/configuration.ccl
new file mode 100644
index 0000000..023aac7
--- /dev/null
+++ b/Examples/Advect/configuration.ccl
@@ -0,0 +1,3 @@
+# File produced by Kranc
+
+REQUIRES GenericFD
diff --git a/Examples/Advect/interface.ccl b/Examples/Advect/interface.ccl
new file mode 100644
index 0000000..da4baae
--- /dev/null
+++ b/Examples/Advect/interface.ccl
@@ -0,0 +1,63 @@
+# File produced by Kranc
+
+implements: Advect
+
+inherits:   Grid GenericFD Boundary
+
+
+
+USES INCLUDE: GenericFD.h
+USES INCLUDE: Symmetry.h
+USES INCLUDE: sbp_calc_coeffs.h
+USES INCLUDE: Boundary.h
+
+CCTK_INT FUNCTION MoLRegisterEvolved(CCTK_INT IN EvolvedIndex, CCTK_INT IN RHSIndex)
+USES FUNCTION MoLRegisterEvolved
+
+SUBROUTINE Diff_coeff(CCTK_POINTER_TO_CONST IN cctkGH, CCTK_INT IN dir, CCTK_INT IN nsize, CCTK_INT OUT ARRAY imin, CCTK_INT OUT ARRAY imax, CCTK_REAL OUT ARRAY q, CCTK_INT IN table_handle)
+USES FUNCTION Diff_coeff
+
+CCTK_INT FUNCTION MultiPatch_GetMap(CCTK_POINTER_TO_CONST IN cctkGH)
+USES FUNCTION MultiPatch_GetMap
+
+CCTK_INT FUNCTION Boundary_SelectGroupForBC(CCTK_POINTER_TO_CONST IN GH, CCTK_INT IN faces, CCTK_INT IN boundary_width, CCTK_INT IN table_handle, CCTK_STRING IN group_name, CCTK_STRING IN bc_name)
+USES FUNCTION Boundary_SelectGroupForBC
+
+CCTK_INT FUNCTION Boundary_SelectVarForBC(CCTK_POINTER_TO_CONST IN GH, CCTK_INT IN faces, CCTK_INT IN boundary_width, CCTK_INT IN table_handle, CCTK_STRING IN var_name, CCTK_STRING IN bc_name)
+USES FUNCTION Boundary_SelectVarForBC
+
+public:
+CCTK_REAL F2rho_group type=GF timelevels=1 tags='tensortypealias="U" tensorweight=0'
+{
+  F2rho1,
+  F2rho2,
+  F2rho3
+} "F2rho_group"
+
+public:
+CCTK_REAL Frho_group type=GF timelevels=1 tags='tensortypealias="U" tensorweight=0'
+{
+  Frho1,
+  Frho2,
+  Frho3
+} "Frho_group"
+
+public:
+CCTK_REAL v_group type=GF timelevels=1 tags='tensortypealias="U" tensorweight=0'
+{
+  v1,
+  v2,
+  v3
+} "v_group"
+
+public:
+CCTK_REAL rho_group type=GF timelevels=3 tags='tensortypealias="Scalar" tensorweight=0'
+{
+  rho
+} "rho_group"
+
+public:
+CCTK_REAL rho_grouprhs type=GF timelevels=3 tags='tensortypealias="Scalar" tensorweight=0'
+{
+  rhorhs
+} "rho_grouprhs"
diff --git a/Examples/Advect/param.ccl b/Examples/Advect/param.ccl
new file mode 100644
index 0000000..a0525ac
--- /dev/null
+++ b/Examples/Advect/param.ccl
@@ -0,0 +1,174 @@
+# File produced by Kranc
+
+
+shares: GenericFD
+
+
+
+shares: MethodOfLines
+
+USES CCTK_INT MoL_Num_Evolved_Vars
+
+restricted:
+CCTK_INT verbose "verbose" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 0
+
+restricted:
+CCTK_REAL sigma "sigma"
+{
+  "*:*" :: ""
+} 0
+
+restricted:
+CCTK_REAL v0 "v0"
+{
+  "*:*" :: ""
+} 0
+
+restricted:
+CCTK_REAL amp "amp"
+{
+  "*:*" :: ""
+} 0
+
+restricted:
+CCTK_REAL hlleAlpha "hlleAlpha"
+{
+  "*:*" :: ""
+} 0
+
+private:
+KEYWORD initial_data "initial_data"
+{
+  "sine" :: "sine"
+  "shock" :: "shock"
+} "sine"
+
+restricted:
+CCTK_INT Advect_MaxNumEvolvedVars "Number of evolved variables used by this thorn" ACCUMULATOR-BASE=MethodofLines::MoL_Num_Evolved_Vars STEERABLE=RECOVER
+{
+  1:1 :: "Number of evolved variables used by this thorn"
+} 1
+
+restricted:
+CCTK_INT timelevels "Number of active timelevels" STEERABLE=RECOVER
+{
+  0:3 :: ""
+} 3
+
+restricted:
+CCTK_INT rhs_timelevels "Number of active RHS timelevels" STEERABLE=RECOVER
+{
+  0:3 :: ""
+} 1
+
+restricted:
+CCTK_INT advect_initial_sine_calc_every "advect_initial_sine_calc_every" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 1
+
+restricted:
+CCTK_INT advect_initial_shock_calc_every "advect_initial_shock_calc_every" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 1
+
+restricted:
+CCTK_INT advect_evol_calc_every "advect_evol_calc_every" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 1
+
+restricted:
+CCTK_INT advect_flux_calc_every "advect_flux_calc_every" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 1
+
+restricted:
+CCTK_INT advect_initial_sine_calc_offset "advect_initial_sine_calc_offset" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 0
+
+restricted:
+CCTK_INT advect_initial_shock_calc_offset "advect_initial_shock_calc_offset" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 0
+
+restricted:
+CCTK_INT advect_evol_calc_offset "advect_evol_calc_offset" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 0
+
+restricted:
+CCTK_INT advect_flux_calc_offset "advect_flux_calc_offset" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 0
+
+private:
+KEYWORD rho_bound "Boundary condition to implement" STEERABLE=ALWAYS
+{
+  "flat" :: "Flat boundary condition"
+  "none" :: "No boundary condition"
+  "static" :: "Boundaries held fixed"
+  "radiative" :: "Radiation boundary condition"
+  "scalar" :: "Dirichlet boundary condition"
+  "newrad" :: "Improved radiative boundary condition"
+  "skip" :: "skip boundary condition code"
+} "skip"
+
+private:
+KEYWORD rho_group_bound "Boundary condition to implement" STEERABLE=ALWAYS
+{
+  "flat" :: "Flat boundary condition"
+  "none" :: "No boundary condition"
+  "static" :: "Boundaries held fixed"
+  "radiative" :: "Radiation boundary condition"
+  "scalar" :: "Dirichlet boundary condition"
+  "newrad" :: "Improved radiative boundary condition"
+  "skip" :: "skip boundary condition code"
+} "none"
+
+private:
+CCTK_REAL rho_bound_speed "characteristic speed at boundary" STEERABLE=ALWAYS
+{
+  "0:*" :: "outgoing characteristic speed > 0"
+} 1.
+
+private:
+CCTK_REAL rho_group_bound_speed "characteristic speed at boundary" STEERABLE=ALWAYS
+{
+  "0:*" :: "outgoing characteristic speed > 0"
+} 1.
+
+private:
+CCTK_REAL rho_bound_limit "limit value for r -> infinity" STEERABLE=ALWAYS
+{
+  "*:*" :: "value of limit value is unrestricted"
+} 0.
+
+private:
+CCTK_REAL rho_group_bound_limit "limit value for r -> infinity" STEERABLE=ALWAYS
+{
+  "*:*" :: "value of limit value is unrestricted"
+} 0.
+
+private:
+CCTK_REAL rho_bound_scalar "Dirichlet boundary value" STEERABLE=ALWAYS
+{
+  "*:*" :: "unrestricted"
+} 0.
+
+private:
+CCTK_REAL rho_group_bound_scalar "Dirichlet boundary value" STEERABLE=ALWAYS
+{
+  "*:*" :: "unrestricted"
+} 0.
+
diff --git a/Examples/Advect/schedule.ccl b/Examples/Advect/schedule.ccl
new file mode 100644
index 0000000..5cac3e7
--- /dev/null
+++ b/Examples/Advect/schedule.ccl
@@ -0,0 +1,98 @@
+# File produced by Kranc
+
+
+STORAGE: F2rho_group[1]
+
+STORAGE: Frho_group[1]
+
+STORAGE: v_group[1]
+
+if (timelevels == 1)
+{
+  STORAGE: rho_group[1]
+}
+if (timelevels == 2)
+{
+  STORAGE: rho_group[2]
+}
+if (timelevels == 3)
+{
+  STORAGE: rho_group[3]
+}
+
+if (rhs_timelevels == 1)
+{
+  STORAGE: rho_grouprhs[1]
+}
+if (rhs_timelevels == 2)
+{
+  STORAGE: rho_grouprhs[2]
+}
+if (rhs_timelevels == 3)
+{
+  STORAGE: rho_grouprhs[3]
+}
+
+schedule Advect_Startup at STARTUP
+{
+  LANG: C
+  OPTIONS: meta
+} "create banner"
+
+schedule Advect_RegisterVars in MoL_Register
+{
+  LANG: C
+  OPTIONS: meta
+} "Register Variables for MoL"
+
+schedule Advect_RegisterSymmetries in SymmetryRegister
+{
+  LANG: C
+  OPTIONS: meta
+} "register symmetries"
+
+
+if (CCTK_EQUALS(initial_data, "sine"))
+{
+  schedule advect_initial_sine at CCTK_INITIAL as advect_initial
+  {
+    LANG: C
+  } "advect_initial_sine"
+}
+
+
+if (CCTK_EQUALS(initial_data, "shock"))
+{
+  schedule advect_initial_shock at CCTK_INITIAL as advect_initial
+  {
+    LANG: C
+  } "advect_initial_shock"
+}
+
+schedule advect_evol in MoL_CalcRHS
+{
+  LANG: C
+} "advect_evol"
+
+schedule advect_flux in MoL_PostStep after Advect_ApplyBCs
+{
+  LANG: C
+} "advect_flux"
+
+schedule Advect_SelectBoundConds in MoL_PostStep
+{
+  LANG: C
+  OPTIONS: level
+  SYNC: rho_group
+} "select boundary conditions"
+
+schedule Advect_CheckBoundaries at BASEGRID
+{
+  LANG: C
+  OPTIONS: meta
+} "check boundaries treatment"
+
+schedule group ApplyBCs as Advect_ApplyBCs in MoL_PostStep after Advect_SelectBoundConds
+{
+  # no language specified
+} "Apply boundary conditions controlled by thorn Boundary"
diff --git a/Examples/Advect/src/Boundaries.cc b/Examples/Advect/src/Boundaries.cc
new file mode 100644
index 0000000..ab7b66f
--- /dev/null
+++ b/Examples/Advect/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 Advect_CheckBoundaries(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  return;
+}
+
+extern "C" void Advect_SelectBoundConds(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  CCTK_INT ierr = 0;
+  
+  if (CCTK_EQUALS(rho_group_bound, "none"  ) ||
+      CCTK_EQUALS(rho_group_bound, "static") ||
+      CCTK_EQUALS(rho_group_bound, "flat"  ) ||
+      CCTK_EQUALS(rho_group_bound, "zero"  ) )
+  {
+    ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, 1, -1,
+                      "Advect::rho_group", rho_group_bound);
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register rho_group_bound BC for Advect::rho_group!");
+  }
+  
+  if (CCTK_EQUALS(rho_bound, "none"  ) ||
+      CCTK_EQUALS(rho_bound, "static") ||
+      CCTK_EQUALS(rho_bound, "flat"  ) ||
+      CCTK_EQUALS(rho_bound, "zero"  ) )
+  {
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, -1,
+                      "Advect::rho", rho_bound);
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register rho_bound BC for Advect::rho!");
+  }
+  
+  if (CCTK_EQUALS(rho_group_bound, "radiative"))
+  {
+   /* select radiation boundary condition */
+    static CCTK_INT handle_rho_group_bound = -1;
+    if (handle_rho_group_bound < 0) handle_rho_group_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_rho_group_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_rho_group_bound , rho_group_bound_limit, "LIMIT") < 0)
+       CCTK_WARN(0, "could not set LIMIT value in table!");
+    if (Util_TableSetReal(handle_rho_group_bound ,rho_group_bound_speed, "SPEED") < 0)
+       CCTK_WARN(0, "could not set SPEED value in table!");
+  
+    ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, 1, handle_rho_group_bound, 
+                      "Advect::rho_group", "Radiation");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register Radiation BC for Advect::rho_group!");
+  
+  }
+  
+  if (CCTK_EQUALS(rho_bound, "radiative"))
+  {
+   /* select radiation boundary condition */
+    static CCTK_INT handle_rho_bound = -1;
+    if (handle_rho_bound < 0) handle_rho_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_rho_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_rho_bound , rho_bound_limit, "LIMIT") < 0)
+       CCTK_WARN(0, "could not set LIMIT value in table!");
+    if (Util_TableSetReal(handle_rho_bound ,rho_bound_speed, "SPEED") < 0)
+        CCTK_WARN(0, "could not set SPEED value in table!");
+  
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, handle_rho_bound, 
+                      "Advect::rho", "Radiation");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register Radiation BC for Advect::rho!");
+  
+  }
+  
+  if (CCTK_EQUALS(rho_group_bound, "scalar"))
+  {
+   /* select scalar boundary condition */
+    static CCTK_INT handle_rho_group_bound = -1;
+    if (handle_rho_group_bound < 0) handle_rho_group_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_rho_group_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_rho_group_bound ,rho_group_bound_scalar, "SCALAR") < 0)
+        CCTK_WARN(0, "could not set SCALAR value in table!");
+  
+    ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, 1, handle_rho_group_bound, 
+                      "Advect::rho_group", "scalar");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register Scalar BC for Advect::rho_group!");
+  
+  }
+  
+  if (CCTK_EQUALS(rho_bound, "scalar"))
+  {
+   /* select scalar boundary condition */
+    static CCTK_INT handle_rho_bound = -1;
+    if (handle_rho_bound < 0) handle_rho_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_rho_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_rho_bound ,rho_bound_scalar, "SCALAR") < 0)
+      CCTK_WARN(0, "could not set SCALAR value in table!");
+  
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, handle_rho_bound, 
+                      "Advect::rho", "scalar");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Error in registering Scalar BC for Advect::rho!");
+  
+  }
+  return;
+}
+
+
+
+/* template for entries in parameter file:
+#$bound$#Advect::rho_group_bound       = "skip"
+#$bound$#Advect::rho_group_bound_speed = 1.0
+#$bound$#Advect::rho_group_bound_limit = 0.0
+#$bound$#Advect::rho_group_bound_scalar = 0.0
+
+#$bound$#Advect::rho_bound       = "skip"
+#$bound$#Advect::rho_bound_speed = 1.0
+#$bound$#Advect::rho_bound_limit = 0.0
+#$bound$#Advect::rho_bound_scalar = 0.0
+
+*/
+
diff --git a/Examples/Advect/src/Differencing.h b/Examples/Advect/src/Differencing.h
new file mode 100644
index 0000000..e30450d
--- /dev/null
+++ b/Examples/Advect/src/Differencing.h
@@ -0,0 +1,39 @@
+#define PDstandard2nd1(u) (p1o2dx*(-(u)[di*(-1)+dj*(0)+dk*(0)] + (u)[di*(1)+dj*(0)+dk*(0)]))
+#define PDstandard2nd2(u) (p1o2dy*(-(u)[di*(0)+dj*(-1)+dk*(0)] + (u)[di*(0)+dj*(1)+dk*(0)]))
+#define PDstandard2nd3(u) (p1o2dz*(-(u)[di*(0)+dj*(0)+dk*(-1)] + (u)[di*(0)+dj*(0)+dk*(1)]))
+#define PDstandard2nd11(u) (p1odx2*(-2*(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(-1)+dj*(0)+dk*(0)] + (u)[di*(1)+dj*(0)+dk*(0)]))
+#define PDstandard2nd22(u) (p1ody2*(-2*(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(0)+dj*(-1)+dk*(0)] + (u)[di*(0)+dj*(1)+dk*(0)]))
+#define PDstandard2nd33(u) (p1odz2*(-2*(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(0)+dj*(0)+dk*(-1)] + (u)[di*(0)+dj*(0)+dk*(1)]))
+#define PDstandard2nd12(u) (p1o4dxdy*((u)[di*(-1)+dj*(-1)+dk*(0)] - (u)[di*(-1)+dj*(1)+dk*(0)] - (u)[di*(1)+dj*(-1)+dk*(0)] + (u)[di*(1)+dj*(1)+dk*(0)]))
+#define PDstandard2nd13(u) (p1o4dxdz*((u)[di*(-1)+dj*(0)+dk*(-1)] - (u)[di*(-1)+dj*(0)+dk*(1)] - (u)[di*(1)+dj*(0)+dk*(-1)] + (u)[di*(1)+dj*(0)+dk*(1)]))
+#define PDstandard2nd21(u) (p1o4dxdy*((u)[di*(-1)+dj*(-1)+dk*(0)] - (u)[di*(-1)+dj*(1)+dk*(0)] - (u)[di*(1)+dj*(-1)+dk*(0)] + (u)[di*(1)+dj*(1)+dk*(0)]))
+#define PDstandard2nd23(u) (p1o4dydz*((u)[di*(0)+dj*(-1)+dk*(-1)] - (u)[di*(0)+dj*(-1)+dk*(1)] - (u)[di*(0)+dj*(1)+dk*(-1)] + (u)[di*(0)+dj*(1)+dk*(1)]))
+#define PDstandard2nd31(u) (p1o4dxdz*((u)[di*(-1)+dj*(0)+dk*(-1)] - (u)[di*(-1)+dj*(0)+dk*(1)] - (u)[di*(1)+dj*(0)+dk*(-1)] + (u)[di*(1)+dj*(0)+dk*(1)]))
+#define PDstandard2nd32(u) (p1o4dydz*((u)[di*(0)+dj*(-1)+dk*(-1)] - (u)[di*(0)+dj*(-1)+dk*(1)] - (u)[di*(0)+dj*(1)+dk*(-1)] + (u)[di*(0)+dj*(1)+dk*(1)]))
+#define PDstandard4th1(u) (p1o12dx*(-8*(u)[di*(-1)+dj*(0)+dk*(0)] + 8*(u)[di*(1)+dj*(0)+dk*(0)] + (u)[di*(-2)+dj*(0)+dk*(0)] - (u)[di*(2)+dj*(0)+dk*(0)]))
+#define PDstandard4th2(u) (p1o12dy*(-8*(u)[di*(0)+dj*(-1)+dk*(0)] + 8*(u)[di*(0)+dj*(1)+dk*(0)] + (u)[di*(0)+dj*(-2)+dk*(0)] - (u)[di*(0)+dj*(2)+dk*(0)]))
+#define PDstandard4th3(u) (p1o12dz*(-8*(u)[di*(0)+dj*(0)+dk*(-1)] + 8*(u)[di*(0)+dj*(0)+dk*(1)] + (u)[di*(0)+dj*(0)+dk*(-2)] - (u)[di*(0)+dj*(0)+dk*(2)]))
+#define PDstandard4th11(u) (pm1o12dx2*(30*(u)[di*(0)+dj*(0)+dk*(0)] - 16*((u)[di*(-1)+dj*(0)+dk*(0)] + (u)[di*(1)+dj*(0)+dk*(0)]) + (u)[di*(-2)+dj*(0)+dk*(0)] + (u)[di*(2)+dj*(0)+dk*(0)]))
+#define PDstandard4th22(u) (pm1o12dy2*(30*(u)[di*(0)+dj*(0)+dk*(0)] - 16*((u)[di*(0)+dj*(-1)+dk*(0)] + (u)[di*(0)+dj*(1)+dk*(0)]) + (u)[di*(0)+dj*(-2)+dk*(0)] + (u)[di*(0)+dj*(2)+dk*(0)]))
+#define PDstandard4th33(u) (pm1o12dz2*(30*(u)[di*(0)+dj*(0)+dk*(0)] - 16*((u)[di*(0)+dj*(0)+dk*(-1)] + (u)[di*(0)+dj*(0)+dk*(1)]) + (u)[di*(0)+dj*(0)+dk*(-2)] + (u)[di*(0)+dj*(0)+dk*(2)]))
+#define PDstandard4th12(u) (p1o144dxdy*(-64*((u)[di*(-1)+dj*(1)+dk*(0)] + (u)[di*(1)+dj*(-1)+dk*(0)]) + 64*((u)[di*(-1)+dj*(-1)+dk*(0)] + (u)[di*(1)+dj*(1)+dk*(0)]) + 8*((u)[di*(-1)+dj*(2)+dk*(0)] + (u)[di*(1)+dj*(-2)+dk*(0)] + (u)[di*(-2)+dj*(1)+dk*(0)] + (u)[di*(2)+dj*(-1)+dk*(0)]) - 8*((u)[di*(-1)+dj*(-2)+dk*(0)] + (u)[di*(1)+dj*(2)+dk*(0)] + (u)[di*(-2)+dj*(-1)+dk*(0)] + (u)[di*(2)+dj*(1)+dk*(0)]) + (u)[di*(-2)+dj*(-2)+dk*(0)] - (u)[di*(-2)+dj*(2)+dk*(0)] - (u)[di*(2)+dj*(-2)+dk*(0)] + (u)[di*(2)+dj*(2)+dk*(0)]))
+#define PDstandard4th13(u) (p1o144dxdz*(-64*((u)[di*(-1)+dj*(0)+dk*(1)] + (u)[di*(1)+dj*(0)+dk*(-1)]) + 64*((u)[di*(-1)+dj*(0)+dk*(-1)] + (u)[di*(1)+dj*(0)+dk*(1)]) + 8*((u)[di*(-1)+dj*(0)+dk*(2)] + (u)[di*(1)+dj*(0)+dk*(-2)] + (u)[di*(-2)+dj*(0)+dk*(1)] + (u)[di*(2)+dj*(0)+dk*(-1)]) - 8*((u)[di*(-1)+dj*(0)+dk*(-2)] + (u)[di*(1)+dj*(0)+dk*(2)] + (u)[di*(-2)+dj*(0)+dk*(-1)] + (u)[di*(2)+dj*(0)+dk*(1)]) + (u)[di*(-2)+dj*(0)+dk*(-2)] - (u)[di*(-2)+dj*(0)+dk*(2)] - (u)[di*(2)+dj*(0)+dk*(-2)] + (u)[di*(2)+dj*(0)+dk*(2)]))
+#define PDstandard4th21(u) (p1o144dxdy*(-64*((u)[di*(-1)+dj*(1)+dk*(0)] + (u)[di*(1)+dj*(-1)+dk*(0)]) + 64*((u)[di*(-1)+dj*(-1)+dk*(0)] + (u)[di*(1)+dj*(1)+dk*(0)]) + 8*((u)[di*(-1)+dj*(2)+dk*(0)] + (u)[di*(1)+dj*(-2)+dk*(0)] + (u)[di*(-2)+dj*(1)+dk*(0)] + (u)[di*(2)+dj*(-1)+dk*(0)]) - 8*((u)[di*(-1)+dj*(-2)+dk*(0)] + (u)[di*(1)+dj*(2)+dk*(0)] + (u)[di*(-2)+dj*(-1)+dk*(0)] + (u)[di*(2)+dj*(1)+dk*(0)]) + (u)[di*(-2)+dj*(-2)+dk*(0)] - (u)[di*(-2)+dj*(2)+dk*(0)] - (u)[di*(2)+dj*(-2)+dk*(0)] + (u)[di*(2)+dj*(2)+dk*(0)]))
+#define PDstandard4th23(u) (p1o144dydz*(-64*((u)[di*(0)+dj*(-1)+dk*(1)] + (u)[di*(0)+dj*(1)+dk*(-1)]) + 64*((u)[di*(0)+dj*(-1)+dk*(-1)] + (u)[di*(0)+dj*(1)+dk*(1)]) + 8*((u)[di*(0)+dj*(-1)+dk*(2)] + (u)[di*(0)+dj*(1)+dk*(-2)] + (u)[di*(0)+dj*(-2)+dk*(1)] + (u)[di*(0)+dj*(2)+dk*(-1)]) - 8*((u)[di*(0)+dj*(-1)+dk*(-2)] + (u)[di*(0)+dj*(1)+dk*(2)] + (u)[di*(0)+dj*(-2)+dk*(-1)] + (u)[di*(0)+dj*(2)+dk*(1)]) + (u)[di*(0)+dj*(-2)+dk*(-2)] - (u)[di*(0)+dj*(-2)+dk*(2)] - (u)[di*(0)+dj*(2)+dk*(-2)] + (u)[di*(0)+dj*(2)+dk*(2)]))
+#define PDstandard4th31(u) (p1o144dxdz*(-64*((u)[di*(-1)+dj*(0)+dk*(1)] + (u)[di*(1)+dj*(0)+dk*(-1)]) + 64*((u)[di*(-1)+dj*(0)+dk*(-1)] + (u)[di*(1)+dj*(0)+dk*(1)]) + 8*((u)[di*(-1)+dj*(0)+dk*(2)] + (u)[di*(1)+dj*(0)+dk*(-2)] + (u)[di*(-2)+dj*(0)+dk*(1)] + (u)[di*(2)+dj*(0)+dk*(-1)]) - 8*((u)[di*(-1)+dj*(0)+dk*(-2)] + (u)[di*(1)+dj*(0)+dk*(2)] + (u)[di*(-2)+dj*(0)+dk*(-1)] + (u)[di*(2)+dj*(0)+dk*(1)]) + (u)[di*(-2)+dj*(0)+dk*(-2)] - (u)[di*(-2)+dj*(0)+dk*(2)] - (u)[di*(2)+dj*(0)+dk*(-2)] + (u)[di*(2)+dj*(0)+dk*(2)]))
+#define PDstandard4th32(u) (p1o144dydz*(-64*((u)[di*(0)+dj*(-1)+dk*(1)] + (u)[di*(0)+dj*(1)+dk*(-1)]) + 64*((u)[di*(0)+dj*(-1)+dk*(-1)] + (u)[di*(0)+dj*(1)+dk*(1)]) + 8*((u)[di*(0)+dj*(-1)+dk*(2)] + (u)[di*(0)+dj*(1)+dk*(-2)] + (u)[di*(0)+dj*(-2)+dk*(1)] + (u)[di*(0)+dj*(2)+dk*(-1)]) - 8*((u)[di*(0)+dj*(-1)+dk*(-2)] + (u)[di*(0)+dj*(1)+dk*(2)] + (u)[di*(0)+dj*(-2)+dk*(-1)] + (u)[di*(0)+dj*(2)+dk*(1)]) + (u)[di*(0)+dj*(-2)+dk*(-2)] - (u)[di*(0)+dj*(-2)+dk*(2)] - (u)[di*(0)+dj*(2)+dk*(-2)] + (u)[di*(0)+dj*(2)+dk*(2)]))
+#define PDonesided2nd1(u) (pm1o2dx*(3*(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(2*dir1)+dj*(0)+dk*(0)] - 4*(u)[di*(dir1)+dj*(0)+dk*(0)])*dir1)
+#define PDonesided2nd2(u) (pm1o2dy*(3*(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(0)+dj*(2*dir2)+dk*(0)] - 4*(u)[di*(0)+dj*(dir2)+dk*(0)])*dir2)
+#define PDonesided2nd3(u) (pm1o2dz*(3*(u)[di*(0)+dj*(0)+dk*(0)] + (u)[di*(0)+dj*(0)+dk*(2*dir3)] - 4*(u)[di*(0)+dj*(0)+dk*(dir3)])*dir3)
+#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)])
+#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)]))
diff --git a/Examples/Advect/src/RegisterMoL.cc b/Examples/Advect/src/RegisterMoL.cc
new file mode 100644
index 0000000..3f9d2d5
--- /dev/null
+++ b/Examples/Advect/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 Advect_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("Advect::rho"),  CCTK_VarIndex("Advect::rhorhs"));
+  return;
+}
diff --git a/Examples/Advect/src/RegisterSymmetries.cc b/Examples/Advect/src/RegisterSymmetries.cc
new file mode 100644
index 0000000..0318c32
--- /dev/null
+++ b/Examples/Advect/src/RegisterSymmetries.cc
@@ -0,0 +1,69 @@
+/*  File produced by Kranc */
+
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+#include "Symmetry.h"
+
+extern "C" void Advect_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, "Advect::rho");
+  
+  sym[0] = -1;
+  sym[1] = 1;
+  sym[2] = 1;
+  SetCartSymVN(cctkGH, sym, "Advect::F2rho1");
+  
+  sym[0] = 1;
+  sym[1] = -1;
+  sym[2] = 1;
+  SetCartSymVN(cctkGH, sym, "Advect::F2rho2");
+  
+  sym[0] = 1;
+  sym[1] = 1;
+  sym[2] = -1;
+  SetCartSymVN(cctkGH, sym, "Advect::F2rho3");
+  
+  sym[0] = -1;
+  sym[1] = 1;
+  sym[2] = 1;
+  SetCartSymVN(cctkGH, sym, "Advect::Frho1");
+  
+  sym[0] = 1;
+  sym[1] = -1;
+  sym[2] = 1;
+  SetCartSymVN(cctkGH, sym, "Advect::Frho2");
+  
+  sym[0] = 1;
+  sym[1] = 1;
+  sym[2] = -1;
+  SetCartSymVN(cctkGH, sym, "Advect::Frho3");
+  
+  sym[0] = -1;
+  sym[1] = 1;
+  sym[2] = 1;
+  SetCartSymVN(cctkGH, sym, "Advect::v1");
+  
+  sym[0] = 1;
+  sym[1] = -1;
+  sym[2] = 1;
+  SetCartSymVN(cctkGH, sym, "Advect::v2");
+  
+  sym[0] = 1;
+  sym[1] = 1;
+  sym[2] = -1;
+  SetCartSymVN(cctkGH, sym, "Advect::v3");
+  
+}
diff --git a/Examples/Advect/src/Startup.cc b/Examples/Advect/src/Startup.cc
new file mode 100644
index 0000000..097c31c
--- /dev/null
+++ b/Examples/Advect/src/Startup.cc
@@ -0,0 +1,10 @@
+/*  File produced by Kranc */
+
+#include "cctk.h"
+
+extern "C" int Advect_Startup(void)
+{
+  const char * banner = "Advect";
+  CCTK_RegisterBanner(banner);
+  return 0;
+}
diff --git a/Examples/Advect/src/advect_evol.cc b/Examples/Advect/src/advect_evol.cc
new file mode 100644
index 0000000..ec65120
--- /dev/null
+++ b/Examples/Advect/src/advect_evol.cc
@@ -0,0 +1,151 @@
+/*  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 advect_evol_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 */, "Advect::rho_grouprhs","flat");
+  if (ierr < 0)
+    CCTK_WARN(1, "Failed to register flat BC for Advect::rho_grouprhs.");
+  return;
+}
+
+static void advect_evol_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 advect_evol_Body");
+  }
+  
+  if (cctk_iteration % advect_evol_calc_every != advect_evol_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"Advect::Frho_group","Advect::rho_grouprhs"};
+  GenericFD_AssertGroupStorage(cctkGH, "advect_evol", 2, groups);
+  
+  GenericFD_EnsureStencilFits(cctkGH, "advect_evol", 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 p1o12dx = 0.0833333333333333333333333333333*INV(dx);
+  CCTK_REAL const p1o12dy = 0.0833333333333333333333333333333*INV(dy);
+  CCTK_REAL const p1o12dz = 0.0833333333333333333333333333333*INV(dz);
+  CCTK_REAL const p1o144dxdy = 0.00694444444444444444444444444444*INV(dx)*INV(dy);
+  CCTK_REAL const p1o144dxdz = 0.00694444444444444444444444444444*INV(dx)*INV(dz);
+  CCTK_REAL const p1o144dydz = 0.00694444444444444444444444444444*INV(dy)*INV(dz);
+  CCTK_REAL const p1o2dx = 0.5*INV(dx);
+  CCTK_REAL const p1o2dy = 0.5*INV(dy);
+  CCTK_REAL const p1o2dz = 0.5*INV(dz);
+  CCTK_REAL const p1o4dxdy = 0.25*INV(dx)*INV(dy);
+  CCTK_REAL const p1o4dxdz = 0.25*INV(dx)*INV(dz);
+  CCTK_REAL const p1o4dydz = 0.25*INV(dy)*INV(dz);
+  CCTK_REAL const p1odx = INV(dx);
+  CCTK_REAL const p1odx2 = INV(SQR(dx));
+  CCTK_REAL const p1ody = INV(dy);
+  CCTK_REAL const p1ody2 = INV(SQR(dy));
+  CCTK_REAL const p1odz = INV(dz);
+  CCTK_REAL const p1odz2 = INV(SQR(dz));
+  CCTK_REAL const pm1o12dx2 = -0.0833333333333333333333333333333*INV(SQR(dx));
+  CCTK_REAL const pm1o12dy2 = -0.0833333333333333333333333333333*INV(SQR(dy));
+  CCTK_REAL const pm1o12dz2 = -0.0833333333333333333333333333333*INV(SQR(dz));
+  CCTK_REAL const pm1o2dx = -0.5*INV(dx);
+  CCTK_REAL const pm1o2dy = -0.5*INV(dy);
+  CCTK_REAL const pm1o2dz = -0.5*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 Frho1L = Frho1[index];
+        CCTK_REAL Frho2L = Frho2[index];
+        CCTK_REAL Frho3L = Frho3[index];
+        
+        
+        /* Include user supplied include files */
+        
+        /* Precompute derivatives */
+        CCTK_REAL const PDstandard2nd1Frho1 = PDstandard2nd1(&Frho1[index]);
+        CCTK_REAL const PDstandard2nd2Frho2 = PDstandard2nd2(&Frho2[index]);
+        CCTK_REAL const PDstandard2nd3Frho3 = PDstandard2nd3(&Frho3[index]);
+        
+        /* Calculate temporaries and grid functions */
+        CCTK_REAL rhorhsL = PDstandard2nd1Frho1 + PDstandard2nd2Frho2 + 
+          PDstandard2nd3Frho3;
+        
+        /* Copy local copies back to grid functions */
+        rhorhs[index] = rhorhsL;
+      }
+    }
+  }
+}
+
+extern "C" void advect_evol(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverInterior(cctkGH, &advect_evol_Body);
+}
diff --git a/Examples/Advect/src/advect_flux.cc b/Examples/Advect/src/advect_flux.cc
new file mode 100644
index 0000000..dd27e27
--- /dev/null
+++ b/Examples/Advect/src/advect_flux.cc
@@ -0,0 +1,141 @@
+/*  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 advect_flux_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 advect_flux_Body");
+  }
+  
+  if (cctk_iteration % advect_flux_calc_every != advect_flux_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"Advect::Frho_group","Advect::rho_group","Advect::v_group"};
+  GenericFD_AssertGroupStorage(cctkGH, "advect_flux", 3, 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 p1o12dx = 0.0833333333333333333333333333333*INV(dx);
+  CCTK_REAL const p1o12dy = 0.0833333333333333333333333333333*INV(dy);
+  CCTK_REAL const p1o12dz = 0.0833333333333333333333333333333*INV(dz);
+  CCTK_REAL const p1o144dxdy = 0.00694444444444444444444444444444*INV(dx)*INV(dy);
+  CCTK_REAL const p1o144dxdz = 0.00694444444444444444444444444444*INV(dx)*INV(dz);
+  CCTK_REAL const p1o144dydz = 0.00694444444444444444444444444444*INV(dy)*INV(dz);
+  CCTK_REAL const p1o2dx = 0.5*INV(dx);
+  CCTK_REAL const p1o2dy = 0.5*INV(dy);
+  CCTK_REAL const p1o2dz = 0.5*INV(dz);
+  CCTK_REAL const p1o4dxdy = 0.25*INV(dx)*INV(dy);
+  CCTK_REAL const p1o4dxdz = 0.25*INV(dx)*INV(dz);
+  CCTK_REAL const p1o4dydz = 0.25*INV(dy)*INV(dz);
+  CCTK_REAL const p1odx = INV(dx);
+  CCTK_REAL const p1odx2 = INV(SQR(dx));
+  CCTK_REAL const p1ody = INV(dy);
+  CCTK_REAL const p1ody2 = INV(SQR(dy));
+  CCTK_REAL const p1odz = INV(dz);
+  CCTK_REAL const p1odz2 = INV(SQR(dz));
+  CCTK_REAL const pm1o12dx2 = -0.0833333333333333333333333333333*INV(SQR(dx));
+  CCTK_REAL const pm1o12dy2 = -0.0833333333333333333333333333333*INV(SQR(dy));
+  CCTK_REAL const pm1o12dz2 = -0.0833333333333333333333333333333*INV(SQR(dz));
+  CCTK_REAL const pm1o2dx = -0.5*INV(dx);
+  CCTK_REAL const pm1o2dy = -0.5*INV(dy);
+  CCTK_REAL const pm1o2dz = -0.5*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 rhoL = rho[index];
+        CCTK_REAL v1L = v1[index];
+        CCTK_REAL v2L = v2[index];
+        CCTK_REAL v3L = v3[index];
+        
+        
+        /* Include user supplied include files */
+        
+        /* Precompute derivatives */
+        
+        /* Calculate temporaries and grid functions */
+        CCTK_REAL Frho1L = rhoL*v1L;
+        
+        CCTK_REAL Frho2L = rhoL*v2L;
+        
+        CCTK_REAL Frho3L = rhoL*v3L;
+        
+        /* Copy local copies back to grid functions */
+        Frho1[index] = Frho1L;
+        Frho2[index] = Frho2L;
+        Frho3[index] = Frho3L;
+      }
+    }
+  }
+}
+
+extern "C" void advect_flux(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverEverything(cctkGH, &advect_flux_Body);
+}
diff --git a/Examples/Advect/src/advect_initial_shock.cc b/Examples/Advect/src/advect_initial_shock.cc
new file mode 100644
index 0000000..c599296
--- /dev/null
+++ b/Examples/Advect/src/advect_initial_shock.cc
@@ -0,0 +1,141 @@
+/*  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 advect_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 advect_initial_shock_Body");
+  }
+  
+  if (cctk_iteration % advect_initial_shock_calc_every != advect_initial_shock_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"grid::coordinates","Advect::rho_group","Advect::v_group"};
+  GenericFD_AssertGroupStorage(cctkGH, "advect_initial_shock", 3, 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 p1o12dx = 0.0833333333333333333333333333333*INV(dx);
+  CCTK_REAL const p1o12dy = 0.0833333333333333333333333333333*INV(dy);
+  CCTK_REAL const p1o12dz = 0.0833333333333333333333333333333*INV(dz);
+  CCTK_REAL const p1o144dxdy = 0.00694444444444444444444444444444*INV(dx)*INV(dy);
+  CCTK_REAL const p1o144dxdz = 0.00694444444444444444444444444444*INV(dx)*INV(dz);
+  CCTK_REAL const p1o144dydz = 0.00694444444444444444444444444444*INV(dy)*INV(dz);
+  CCTK_REAL const p1o2dx = 0.5*INV(dx);
+  CCTK_REAL const p1o2dy = 0.5*INV(dy);
+  CCTK_REAL const p1o2dz = 0.5*INV(dz);
+  CCTK_REAL const p1o4dxdy = 0.25*INV(dx)*INV(dy);
+  CCTK_REAL const p1o4dxdz = 0.25*INV(dx)*INV(dz);
+  CCTK_REAL const p1o4dydz = 0.25*INV(dy)*INV(dz);
+  CCTK_REAL const p1odx = INV(dx);
+  CCTK_REAL const p1odx2 = INV(SQR(dx));
+  CCTK_REAL const p1ody = INV(dy);
+  CCTK_REAL const p1ody2 = INV(SQR(dy));
+  CCTK_REAL const p1odz = INV(dz);
+  CCTK_REAL const p1odz2 = INV(SQR(dz));
+  CCTK_REAL const pm1o12dx2 = -0.0833333333333333333333333333333*INV(SQR(dx));
+  CCTK_REAL const pm1o12dy2 = -0.0833333333333333333333333333333*INV(SQR(dy));
+  CCTK_REAL const pm1o12dz2 = -0.0833333333333333333333333333333*INV(SQR(dz));
+  CCTK_REAL const pm1o2dx = -0.5*INV(dx);
+  CCTK_REAL const pm1o2dy = -0.5*INV(dy);
+  CCTK_REAL const pm1o2dz = -0.5*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 v1L = ToReal(v0);
+        
+        CCTK_REAL v2L = 0;
+        
+        CCTK_REAL v3L = 0;
+        
+        CCTK_REAL rhoL = ToReal(amp)*UnitStep(-0.5 + xL);
+        
+        /* Copy local copies back to grid functions */
+        rho[index] = rhoL;
+        v1[index] = v1L;
+        v2[index] = v2L;
+        v3[index] = v3L;
+      }
+    }
+  }
+}
+
+extern "C" void advect_initial_shock(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverEverything(cctkGH, &advect_initial_shock_Body);
+}
diff --git a/Examples/Advect/src/advect_initial_sine.cc b/Examples/Advect/src/advect_initial_sine.cc
new file mode 100644
index 0000000..9e9f54d
--- /dev/null
+++ b/Examples/Advect/src/advect_initial_sine.cc
@@ -0,0 +1,141 @@
+/*  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 advect_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 advect_initial_sine_Body");
+  }
+  
+  if (cctk_iteration % advect_initial_sine_calc_every != advect_initial_sine_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"grid::coordinates","Advect::rho_group","Advect::v_group"};
+  GenericFD_AssertGroupStorage(cctkGH, "advect_initial_sine", 3, 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 p1o12dx = 0.0833333333333333333333333333333*INV(dx);
+  CCTK_REAL const p1o12dy = 0.0833333333333333333333333333333*INV(dy);
+  CCTK_REAL const p1o12dz = 0.0833333333333333333333333333333*INV(dz);
+  CCTK_REAL const p1o144dxdy = 0.00694444444444444444444444444444*INV(dx)*INV(dy);
+  CCTK_REAL const p1o144dxdz = 0.00694444444444444444444444444444*INV(dx)*INV(dz);
+  CCTK_REAL const p1o144dydz = 0.00694444444444444444444444444444*INV(dy)*INV(dz);
+  CCTK_REAL const p1o2dx = 0.5*INV(dx);
+  CCTK_REAL const p1o2dy = 0.5*INV(dy);
+  CCTK_REAL const p1o2dz = 0.5*INV(dz);
+  CCTK_REAL const p1o4dxdy = 0.25*INV(dx)*INV(dy);
+  CCTK_REAL const p1o4dxdz = 0.25*INV(dx)*INV(dz);
+  CCTK_REAL const p1o4dydz = 0.25*INV(dy)*INV(dz);
+  CCTK_REAL const p1odx = INV(dx);
+  CCTK_REAL const p1odx2 = INV(SQR(dx));
+  CCTK_REAL const p1ody = INV(dy);
+  CCTK_REAL const p1ody2 = INV(SQR(dy));
+  CCTK_REAL const p1odz = INV(dz);
+  CCTK_REAL const p1odz2 = INV(SQR(dz));
+  CCTK_REAL const pm1o12dx2 = -0.0833333333333333333333333333333*INV(SQR(dx));
+  CCTK_REAL const pm1o12dy2 = -0.0833333333333333333333333333333*INV(SQR(dy));
+  CCTK_REAL const pm1o12dz2 = -0.0833333333333333333333333333333*INV(SQR(dz));
+  CCTK_REAL const pm1o2dx = -0.5*INV(dx);
+  CCTK_REAL const pm1o2dy = -0.5*INV(dy);
+  CCTK_REAL const pm1o2dz = -0.5*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 v1L = ToReal(v0);
+        
+        CCTK_REAL v2L = 0;
+        
+        CCTK_REAL v3L = 0;
+        
+        CCTK_REAL rhoL = 1 + Sin(2*Pi*xL)*ToReal(amp);
+        
+        /* Copy local copies back to grid functions */
+        rho[index] = rhoL;
+        v1[index] = v1L;
+        v2[index] = v2L;
+        v3[index] = v3L;
+      }
+    }
+  }
+}
+
+extern "C" void advect_initial_sine(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverEverything(cctkGH, &advect_initial_sine_Body);
+}
diff --git a/Examples/Advect/src/make.code.defn b/Examples/Advect/src/make.code.defn
new file mode 100644
index 0000000..61f7edb
--- /dev/null
+++ b/Examples/Advect/src/make.code.defn
@@ -0,0 +1,3 @@
+# File produced by Kranc
+
+SRCS = Startup.cc RegisterMoL.cc RegisterSymmetries.cc advect_initial_sine.cc advect_initial_shock.cc advect_evol.cc advect_flux.cc Boundaries.cc