From 1ea64b24fe83bedb19219ea4368712f355bc5555 Mon Sep 17 00:00:00 2001
From: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
Date: Tue, 26 Feb 2019 11:31:17 +0000
Subject: [PATCH] Smearing test. Test on free field.

---
 tests/smearing/Test_smearing.cc | 73 +++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 tests/smearing/Test_smearing.cc

diff --git a/tests/smearing/Test_smearing.cc b/tests/smearing/Test_smearing.cc
new file mode 100644
index 00000000..996671f0
--- /dev/null
+++ b/tests/smearing/Test_smearing.cc
@@ -0,0 +1,73 @@
+/*
+ *
+
+    Grid physics library, www.github.com/paboyle/Grid
+
+    Source file: ./tests/Test_wilson_cg_prec.cc
+
+    Copyright (C) 2015
+
+Author: Peter Boyle <paboyle@ph.ed.ac.uk>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+    See the full license in the file "LICENSE" in the top level distribution directory
+    *************************************************************************************/
+    /*  END LEGAL */
+#include <Grid/Grid.h>
+
+using namespace std;
+using namespace Grid;
+using namespace Grid::QCD;
+
+
+int main (int argc, char ** argv)
+{
+  Grid_init(&argc,&argv);
+
+
+  std::vector<int> latt_size   = GridDefaultLatt();
+  std::vector<int> simd_layout = GridDefaultSimd(Nd,vComplex::Nsimd());
+  std::vector<int> mpi_layout  = GridDefaultMpi();
+  GridCartesian               Grid(latt_size,simd_layout,mpi_layout);
+
+  std::vector<int> seeds({1,2,3,4});
+  GridParallelRNG          pRNG(&Grid);  pRNG.SeedFixedIntegers(seeds);
+
+  LatticeFermion src(&Grid); random(pRNG,src);
+  RealD nrm = norm2(src);
+  LatticeFermion result(&Grid); result=zero;
+  LatticeGaugeField Umu(&Grid);
+  //  SU3::HotConfiguration(pRNG,Umu);
+  SU3::ColdConfiguration(Umu);
+  std::vector<LatticeColourMatrix> U(4,&Grid);
+
+  for(int mu=0;mu<Nd;mu++){
+    U[mu] = PeekIndex<LorentzIndex>(Umu,mu);
+  }
+
+  std::vector<int> site({4,4,0,0});
+  src=zero;
+  SpinColourVector scv;
+  scv=zero;
+  scv()(0)(0) = 1.0;
+  pokeSite(scv,src,site);
+
+  CovariantSmearing<PeriodicGimplR>::GaussianSmear(U, src, 2.0, 50, Tdir);
+
+  std::cout << src <<std::endl;
+  
+}
+