SimpleWave example: Add generated thorn

12 files changed, 794 insertions, 0 deletions

diff --git a/Examples/SimpleWave/configuration.ccl b/Examples/SimpleWave/configuration.ccl
new file mode 100644
index 0000000..023aac7
--- /dev/null
+++ b/Examples/SimpleWave/configuration.ccl
@@ -0,0 +1,3 @@
+# File produced by Kranc
+
+REQUIRES GenericFD
diff --git a/Examples/SimpleWave/interface.ccl b/Examples/SimpleWave/interface.ccl
new file mode 100644
index 0000000..67c3c69
--- /dev/null
+++ b/Examples/SimpleWave/interface.ccl
@@ -0,0 +1,41 @@
+# File produced by Kranc
+
+implements: SimpleWave
+
+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 evolved_group type=GF timelevels=3 tags=''
+{
+  phi,
+  pi
+} "evolved_group"
+
+public:
+CCTK_REAL evolved_grouprhs type=GF timelevels=3 tags=''
+{
+  phirhs,
+  pirhs
+} "evolved_grouprhs"
diff --git a/Examples/SimpleWave/param.ccl b/Examples/SimpleWave/param.ccl
new file mode 100644
index 0000000..8f36068
--- /dev/null
+++ b/Examples/SimpleWave/param.ccl
@@ -0,0 +1,155 @@
+# 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 hlleAlpha "hlleAlpha"
+{
+  "*:*" :: ""
+} 0
+
+restricted:
+CCTK_INT SimpleWave_MaxNumEvolvedVars "Number of evolved variables used by this thorn" ACCUMULATOR-BASE=MethodofLines::MoL_Num_Evolved_Vars STEERABLE=RECOVER
+{
+  2:2 :: "Number of evolved variables used by this thorn"
+} 2
+
+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 initial_sine_calc_every "initial_sine_calc_every" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 1
+
+restricted:
+CCTK_INT calc_rhs_calc_every "calc_rhs_calc_every" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 1
+
+restricted:
+CCTK_INT initial_sine_calc_offset "initial_sine_calc_offset" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 0
+
+restricted:
+CCTK_INT calc_rhs_calc_offset "calc_rhs_calc_offset" STEERABLE=ALWAYS
+{
+  *:* :: ""
+} 0
+
+private:
+KEYWORD phi_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 pi_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 evolved_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 phi_bound_speed "characteristic speed at boundary" STEERABLE=ALWAYS
+{
+  "0:*" :: "outgoing characteristic speed > 0"
+} 1.
+
+private:
+CCTK_REAL pi_bound_speed "characteristic speed at boundary" STEERABLE=ALWAYS
+{
+  "0:*" :: "outgoing characteristic speed > 0"
+} 1.
+
+private:
+CCTK_REAL evolved_group_bound_speed "characteristic speed at boundary" STEERABLE=ALWAYS
+{
+  "0:*" :: "outgoing characteristic speed > 0"
+} 1.
+
+private:
+CCTK_REAL phi_bound_limit "limit value for r -> infinity" STEERABLE=ALWAYS
+{
+  "*:*" :: "value of limit value is unrestricted"
+} 0.
+
+private:
+CCTK_REAL pi_bound_limit "limit value for r -> infinity" STEERABLE=ALWAYS
+{
+  "*:*" :: "value of limit value is unrestricted"
+} 0.
+
+private:
+CCTK_REAL evolved_group_bound_limit "limit value for r -> infinity" STEERABLE=ALWAYS
+{
+  "*:*" :: "value of limit value is unrestricted"
+} 0.
+
+private:
+CCTK_REAL phi_bound_scalar "Dirichlet boundary value" STEERABLE=ALWAYS
+{
+  "*:*" :: "unrestricted"
+} 0.
+
+private:
+CCTK_REAL pi_bound_scalar "Dirichlet boundary value" STEERABLE=ALWAYS
+{
+  "*:*" :: "unrestricted"
+} 0.
+
+private:
+CCTK_REAL evolved_group_bound_scalar "Dirichlet boundary value" STEERABLE=ALWAYS
+{
+  "*:*" :: "unrestricted"
+} 0.
+
diff --git a/Examples/SimpleWave/schedule.ccl b/Examples/SimpleWave/schedule.ccl
new file mode 100644
index 0000000..d5e8e4c
--- /dev/null
+++ b/Examples/SimpleWave/schedule.ccl
@@ -0,0 +1,74 @@
+# File produced by Kranc
+
+
+if (timelevels == 1)
+{
+  STORAGE: evolved_group[1]
+}
+if (timelevels == 2)
+{
+  STORAGE: evolved_group[2]
+}
+if (timelevels == 3)
+{
+  STORAGE: evolved_group[3]
+}
+
+if (rhs_timelevels == 1)
+{
+  STORAGE: evolved_grouprhs[1]
+}
+if (rhs_timelevels == 2)
+{
+  STORAGE: evolved_grouprhs[2]
+}
+if (rhs_timelevels == 3)
+{
+  STORAGE: evolved_grouprhs[3]
+}
+
+schedule SimpleWave_Startup at STARTUP
+{
+  LANG: C
+  OPTIONS: meta
+} "create banner"
+
+schedule SimpleWave_RegisterVars in MoL_Register
+{
+  LANG: C
+  OPTIONS: meta
+} "Register Variables for MoL"
+
+schedule SimpleWave_RegisterSymmetries in SymmetryRegister
+{
+  LANG: C
+  OPTIONS: meta
+} "register symmetries"
+
+schedule initial_sine AT INITIAL
+{
+  LANG: C
+} "initial_sine"
+
+schedule calc_rhs in MoL_CalcRHS
+{
+  LANG: C
+} "calc_rhs"
+
+schedule SimpleWave_SelectBoundConds in MoL_PostStep
+{
+  LANG: C
+  OPTIONS: level
+  SYNC: evolved_group
+} "select boundary conditions"
+
+schedule SimpleWave_CheckBoundaries at BASEGRID
+{
+  LANG: C
+  OPTIONS: meta
+} "check boundaries treatment"
+
+schedule group ApplyBCs as SimpleWave_ApplyBCs in MoL_PostStep after SimpleWave_SelectBoundConds
+{
+  # no language specified
+} "Apply boundary conditions controlled by thorn Boundary"
diff --git a/Examples/SimpleWave/src/Boundaries.cc b/Examples/SimpleWave/src/Boundaries.cc
new file mode 100644
index 0000000..7a81cc7
--- /dev/null
+++ b/Examples/SimpleWave/src/Boundaries.cc
@@ -0,0 +1,197 @@
+/*  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 SimpleWave_CheckBoundaries(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  return;
+}
+
+extern "C" void SimpleWave_SelectBoundConds(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  CCTK_INT ierr = 0;
+  
+  if (CCTK_EQUALS(evolved_group_bound, "none"  ) ||
+      CCTK_EQUALS(evolved_group_bound, "static") ||
+      CCTK_EQUALS(evolved_group_bound, "flat"  ) ||
+      CCTK_EQUALS(evolved_group_bound, "zero"  ) )
+  {
+    ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, 1, -1,
+                      "SimpleWave::evolved_group", evolved_group_bound);
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register evolved_group_bound BC for SimpleWave::evolved_group!");
+  }
+  
+  if (CCTK_EQUALS(phi_bound, "none"  ) ||
+      CCTK_EQUALS(phi_bound, "static") ||
+      CCTK_EQUALS(phi_bound, "flat"  ) ||
+      CCTK_EQUALS(phi_bound, "zero"  ) )
+  {
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, -1,
+                      "SimpleWave::phi", phi_bound);
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register phi_bound BC for SimpleWave::phi!");
+  }
+  
+  if (CCTK_EQUALS(pi_bound, "none"  ) ||
+      CCTK_EQUALS(pi_bound, "static") ||
+      CCTK_EQUALS(pi_bound, "flat"  ) ||
+      CCTK_EQUALS(pi_bound, "zero"  ) )
+  {
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, -1,
+                      "SimpleWave::pi", pi_bound);
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register pi_bound BC for SimpleWave::pi!");
+  }
+  
+  if (CCTK_EQUALS(evolved_group_bound, "radiative"))
+  {
+   /* select radiation boundary condition */
+    static CCTK_INT handle_evolved_group_bound = -1;
+    if (handle_evolved_group_bound < 0) handle_evolved_group_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_evolved_group_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_evolved_group_bound , evolved_group_bound_limit, "LIMIT") < 0)
+       CCTK_WARN(0, "could not set LIMIT value in table!");
+    if (Util_TableSetReal(handle_evolved_group_bound ,evolved_group_bound_speed, "SPEED") < 0)
+       CCTK_WARN(0, "could not set SPEED value in table!");
+  
+    ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, 1, handle_evolved_group_bound, 
+                      "SimpleWave::evolved_group", "Radiation");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register Radiation BC for SimpleWave::evolved_group!");
+  
+  }
+  
+  if (CCTK_EQUALS(phi_bound, "radiative"))
+  {
+   /* select radiation boundary condition */
+    static CCTK_INT handle_phi_bound = -1;
+    if (handle_phi_bound < 0) handle_phi_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_phi_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_phi_bound , phi_bound_limit, "LIMIT") < 0)
+       CCTK_WARN(0, "could not set LIMIT value in table!");
+    if (Util_TableSetReal(handle_phi_bound ,phi_bound_speed, "SPEED") < 0)
+        CCTK_WARN(0, "could not set SPEED value in table!");
+  
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, handle_phi_bound, 
+                      "SimpleWave::phi", "Radiation");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register Radiation BC for SimpleWave::phi!");
+  
+  }
+  
+  if (CCTK_EQUALS(pi_bound, "radiative"))
+  {
+   /* select radiation boundary condition */
+    static CCTK_INT handle_pi_bound = -1;
+    if (handle_pi_bound < 0) handle_pi_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_pi_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_pi_bound , pi_bound_limit, "LIMIT") < 0)
+       CCTK_WARN(0, "could not set LIMIT value in table!");
+    if (Util_TableSetReal(handle_pi_bound ,pi_bound_speed, "SPEED") < 0)
+        CCTK_WARN(0, "could not set SPEED value in table!");
+  
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, handle_pi_bound, 
+                      "SimpleWave::pi", "Radiation");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register Radiation BC for SimpleWave::pi!");
+  
+  }
+  
+  if (CCTK_EQUALS(evolved_group_bound, "scalar"))
+  {
+   /* select scalar boundary condition */
+    static CCTK_INT handle_evolved_group_bound = -1;
+    if (handle_evolved_group_bound < 0) handle_evolved_group_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_evolved_group_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_evolved_group_bound ,evolved_group_bound_scalar, "SCALAR") < 0)
+        CCTK_WARN(0, "could not set SCALAR value in table!");
+  
+    ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, 1, handle_evolved_group_bound, 
+                      "SimpleWave::evolved_group", "scalar");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Failed to register Scalar BC for SimpleWave::evolved_group!");
+  
+  }
+  
+  if (CCTK_EQUALS(phi_bound, "scalar"))
+  {
+   /* select scalar boundary condition */
+    static CCTK_INT handle_phi_bound = -1;
+    if (handle_phi_bound < 0) handle_phi_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_phi_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_phi_bound ,phi_bound_scalar, "SCALAR") < 0)
+      CCTK_WARN(0, "could not set SCALAR value in table!");
+  
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, handle_phi_bound, 
+                      "SimpleWave::phi", "scalar");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Error in registering Scalar BC for SimpleWave::phi!");
+  
+  }
+  
+  if (CCTK_EQUALS(pi_bound, "scalar"))
+  {
+   /* select scalar boundary condition */
+    static CCTK_INT handle_pi_bound = -1;
+    if (handle_pi_bound < 0) handle_pi_bound = Util_TableCreate(UTIL_TABLE_FLAGS_CASE_INSENSITIVE);
+    if (handle_pi_bound < 0) CCTK_WARN(0, "could not create table!");
+    if (Util_TableSetReal(handle_pi_bound ,pi_bound_scalar, "SCALAR") < 0)
+      CCTK_WARN(0, "could not set SCALAR value in table!");
+  
+    ierr = Boundary_SelectVarForBC(cctkGH, CCTK_ALL_FACES, 1, handle_pi_bound, 
+                      "SimpleWave::pi", "scalar");
+  
+    if (ierr < 0)
+       CCTK_WARN(0, "Error in registering Scalar BC for SimpleWave::pi!");
+  
+  }
+  return;
+}
+
+
+
+/* template for entries in parameter file:
+#$bound$#SimpleWave::evolved_group_bound       = "skip"
+#$bound$#SimpleWave::evolved_group_bound_speed = 1.0
+#$bound$#SimpleWave::evolved_group_bound_limit = 0.0
+#$bound$#SimpleWave::evolved_group_bound_scalar = 0.0
+
+#$bound$#SimpleWave::phi_bound       = "skip"
+#$bound$#SimpleWave::phi_bound_speed = 1.0
+#$bound$#SimpleWave::phi_bound_limit = 0.0
+#$bound$#SimpleWave::phi_bound_scalar = 0.0
+
+#$bound$#SimpleWave::pi_bound       = "skip"
+#$bound$#SimpleWave::pi_bound_speed = 1.0
+#$bound$#SimpleWave::pi_bound_limit = 0.0
+#$bound$#SimpleWave::pi_bound_scalar = 0.0
+
+*/
+
diff --git a/Examples/SimpleWave/src/Differencing.h b/Examples/SimpleWave/src/Differencing.h
new file mode 100644
index 0000000..84d7298
--- /dev/null
+++ b/Examples/SimpleWave/src/Differencing.h
@@ -0,0 +1,18 @@
+#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 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/SimpleWave/src/RegisterMoL.cc b/Examples/SimpleWave/src/RegisterMoL.cc
new file mode 100644
index 0000000..c1d917d
--- /dev/null
+++ b/Examples/SimpleWave/src/RegisterMoL.cc
@@ -0,0 +1,18 @@
+/*  File produced by Kranc */
+
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+
+extern "C" void SimpleWave_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("SimpleWave::phi"),  CCTK_VarIndex("SimpleWave::phirhs"));
+  ierr += MoLRegisterEvolved(CCTK_VarIndex("SimpleWave::pi"),  CCTK_VarIndex("SimpleWave::pirhs"));
+  return;
+}
diff --git a/Examples/SimpleWave/src/RegisterSymmetries.cc b/Examples/SimpleWave/src/RegisterSymmetries.cc
new file mode 100644
index 0000000..0aef960
--- /dev/null
+++ b/Examples/SimpleWave/src/RegisterSymmetries.cc
@@ -0,0 +1,29 @@
+/*  File produced by Kranc */
+
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+#include "Symmetry.h"
+
+extern "C" void SimpleWave_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, "SimpleWave::phi");
+  
+  sym[0] = 1;
+  sym[1] = 1;
+  sym[2] = 1;
+  SetCartSymVN(cctkGH, sym, "SimpleWave::pi");
+  
+}
diff --git a/Examples/SimpleWave/src/Startup.cc b/Examples/SimpleWave/src/Startup.cc
new file mode 100644
index 0000000..3ea9091
--- /dev/null
+++ b/Examples/SimpleWave/src/Startup.cc
@@ -0,0 +1,10 @@
+/*  File produced by Kranc */
+
+#include "cctk.h"
+
+extern "C" int SimpleWave_Startup(void)
+{
+  const char * banner = "SimpleWave";
+  CCTK_RegisterBanner(banner);
+  return 0;
+}
diff --git a/Examples/SimpleWave/src/calc_rhs.cc b/Examples/SimpleWave/src/calc_rhs.cc
new file mode 100644
index 0000000..4dfe490
--- /dev/null
+++ b/Examples/SimpleWave/src/calc_rhs.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))
+
+static void calc_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 calc_rhs_Body");
+  }
+  
+  if (cctk_iteration % calc_rhs_calc_every != calc_rhs_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"SimpleWave::evolved_group","SimpleWave::evolved_grouprhs"};
+  GenericFD_AssertGroupStorage(cctkGH, "calc_rhs", 2, groups);
+  
+  GenericFD_EnsureStencilFits(cctkGH, "calc_rhs", 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 p1o2dx = 0.5*INV(dx);
+  CCTK_REAL const p1o2dy = 0.5*INV(dy);
+  CCTK_REAL const p1o2dz = 0.5*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));
+  
+  /* 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 phiL = phi[index];
+        CCTK_REAL piL = pi[index];
+        
+        
+        /* Include user supplied include files */
+        
+        /* Precompute derivatives */
+        CCTK_REAL const PDstandard2nd11phi = PDstandard2nd11(&phi[index]);
+        CCTK_REAL const PDstandard2nd22phi = PDstandard2nd22(&phi[index]);
+        CCTK_REAL const PDstandard2nd33phi = PDstandard2nd33(&phi[index]);
+        
+        /* Calculate temporaries and grid functions */
+        CCTK_REAL phirhsL = piL;
+        
+        CCTK_REAL pirhsL = PDstandard2nd11phi + PDstandard2nd22phi + 
+          PDstandard2nd33phi;
+        
+        /* Copy local copies back to grid functions */
+        phirhs[index] = phirhsL;
+        pirhs[index] = pirhsL;
+      }
+    }
+  }
+}
+
+extern "C" void calc_rhs(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverEverything(cctkGH, &calc_rhs_Body);
+}
diff --git a/Examples/SimpleWave/src/initial_sine.cc b/Examples/SimpleWave/src/initial_sine.cc
new file mode 100644
index 0000000..0a450d2
--- /dev/null
+++ b/Examples/SimpleWave/src/initial_sine.cc
@@ -0,0 +1,120 @@
+/*  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 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 initial_sine_Body");
+  }
+  
+  if (cctk_iteration % initial_sine_calc_every != initial_sine_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"SimpleWave::evolved_group","grid::coordinates"};
+  GenericFD_AssertGroupStorage(cctkGH, "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 p1o2dx = 0.5*INV(dx);
+  CCTK_REAL const p1o2dy = 0.5*INV(dy);
+  CCTK_REAL const p1o2dz = 0.5*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));
+  
+  /* 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 phiL = Sin(2*Pi*(xL - cctk_time));
+        
+        CCTK_REAL piL = -2*Pi*Cos(2*Pi*(xL - cctk_time));
+        
+        /* Copy local copies back to grid functions */
+        phi[index] = phiL;
+        pi[index] = piL;
+      }
+    }
+  }
+}
+
+extern "C" void initial_sine(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverEverything(cctkGH, &initial_sine_Body);
+}
diff --git a/Examples/SimpleWave/src/make.code.defn b/Examples/SimpleWave/src/make.code.defn
new file mode 100644
index 0000000..535f5d0
--- /dev/null
+++ b/Examples/SimpleWave/src/make.code.defn
@@ -0,0 +1,3 @@
+# File produced by Kranc
+
+SRCS = Startup.cc RegisterMoL.cc RegisterSymmetries.cc initial_sine.cc calc_rhs.cc Boundaries.cc