From 0e9475817fe6d7e44361f40206fcba96bfc2b153 Mon Sep 17 00:00:00 2001
From: Ian Hinder <ian.hinder@aei.mpg.de>
Date: Thu, 15 Dec 2011 17:53:08 +0100
Subject: EulerAuto example: Add generated thorn

---
 Examples/EulerAuto/src/eulerauto_initial_shock.cc | 126 ++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 Examples/EulerAuto/src/eulerauto_initial_shock.cc

(limited to 'Examples/EulerAuto/src/eulerauto_initial_shock.cc')

diff --git a/Examples/EulerAuto/src/eulerauto_initial_shock.cc b/Examples/EulerAuto/src/eulerauto_initial_shock.cc
new file mode 100644
index 0000000..d4bf071
--- /dev/null
+++ b/Examples/EulerAuto/src/eulerauto_initial_shock.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 eulerauto_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 eulerauto_initial_shock_Body");
+  }
+  
+  if (cctk_iteration % eulerauto_initial_shock_calc_every != eulerauto_initial_shock_calc_offset)
+  {
+    return;
+  }
+  
+  const char *groups[] = {"grid::coordinates","EulerAuto::p_group","EulerAuto::rho_group","EulerAuto::v_group"};
+  GenericFD_AssertGroupStorage(cctkGH, "eulerauto_initial_shock", 4, 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 rhoL = Piecewise(List(List(ToReal(rhoL0),xL < 0.5)),0. + 
+          ToReal(rhoR0));
+        
+        CCTK_REAL v1L = Piecewise(List(List(ToReal(vL0),xL < 0.5)),0. + 
+          ToReal(vR0));
+        
+        CCTK_REAL v2L = 0;
+        
+        CCTK_REAL v3L = 0;
+        
+        CCTK_REAL pL = Piecewise(List(List(ToReal(pL0),xL < 0.5)),0. + 
+          ToReal(pR0));
+        
+        /* Copy local copies back to grid functions */
+        p[index] = pL;
+        rho[index] = rhoL;
+        v1[index] = v1L;
+        v2[index] = v2L;
+        v3[index] = v3L;
+      }
+    }
+  }
+}
+
+extern "C" void eulerauto_initial_shock(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  GenericFD_LoopOverEverything(cctkGH, &eulerauto_initial_shock_Body);
+}
-- 
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