Compile CIC. Imported tool to convert gadget snapshot to density field

sample/CMakeLists.txt

@@ -77,3 +77,6 @@ if (Boost_FOUND)
   add_executable(simple3DFilter simple3DFilter.cpp)
   target_link_libraries(simple3DFilter ${tolink})
 endif (Boost_FOUND)
+
+add_executable(gadgetToDensity gadgetToDensity.cpp)
+target_link_libraries(gadgetToDensity ${tolink})

sample/gadgetToDensity.cpp

@@ -0,0 +1,62 @@
+#include <cmath>
+#include <iostream>
+#include <cstdlib>
+#include "cic.hpp"
+#include "loadGadget.hpp"
+#include "miniargs.hpp"
+#include "yorick.hpp"
+
+using namespace std;
+using namespace CosmoTool;
+
+int main(int argc, char **argv)
+{
+  uint32_t res;
+  char *fname;
+  int id;
+
+  MiniArgDesc desc[] = {
+    { "SNAPSHOT", &fname, MINIARG_STRING },
+    { "ID", &id, MINIARG_INT },
+    { "RESOLUTION", &res, MINIARG_INT },
+    { 0, 0, MINIARG_NULL }
+  };
+
+  if (!parseMiniArgs(argc, argv, desc))
+    return 1;
+
+  SimuData *p = loadGadgetMulti(fname, 0, 0);
+  double L0 = p->BoxSize/1000;
+  CICFilter filter(res, L0);
+
+  delete p;
+
+  try {
+  for (int cpuid=0;;cpuid++) {
+    p = loadGadgetMulti(fname, cpuid, NEED_POSITION);
+    for (uint32_t i = 0; i < p->NumPart; i++)
+    {
+      CICParticles a;
+      
+      a.mass = 1.0;
+      a.coords[0] = p->Pos[0][i]/1000;
+      a.coords[1] = p->Pos[1][i]/1000;
+      a.coords[2] = p->Pos[2][i]/1000;
+      filter.putParticles(&a, 1);
+    }
+  
+    delete p;
+  }
+  } catch (const NoSuchFileException& e) {}
+
+  CICType *denField;
+  uint32_t Ntot;
+  filter.getDensityField(denField, Ntot);
+  
+  cout << "L0=" << L0 << endl;
+  cout << "Saving density field" << endl;
+  uint32_t dimList[] = { res, res, res};
+  saveArray("densityField.nc", denField, dimList, 3);
+
+  return 0;
+}

src/CMakeLists.txt

@@ -9,6 +9,7 @@ SET(CosmoTool_SRCS
 	miniargs.cpp
 	growthFactor.cpp
 	cosmopower.cpp
+  cic.cpp
 )
 
 IF(FOUND_NETCDF3)