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--- dev:data_output [2014/10/17 03:20] – created csymonds
+++ dev:data_output [2014/10/17 03:55] (current) – [AbstractDriver.h] csymonds
@@ Line 7: / Line 7: @@
 . /src/sim/include/AbstractDriver.h
-===main.cpp===
+====main.cpp====
-To edit the main.cpp file, paste the following code into the Private section of the file:
+To edit the main.cpp file, paste the following code into the **Private** section of the file:
 <code cpp>
-    const char* GetSimDirPathTemporary(const char* format, ...) const
+const char* GetSimDirPathTemporary(const char* format, ...) const
+{
+  static OverflowableCharBufferByteSink<500> buf;
+  buf.Reset();
+  buf.Printf("%s",this->GetSimulationBasePath());
+  va_list ap;
+  va_start(ap, format);
+  buf.Vprintf(format, ap);
+  if (buf.HasOverflowed())
+  {
+     FAIL(OUT_OF_ROOM);
+  }
+  return buf.GetZString();
+}
+</code>
+and
+<code cpp>
+typedef typename CC::PARAM_CONFIG P;
+typedef typename CC::ATOM_TYPE T;
+</code>
+Then paste the following in the **public** section of main.cpp:
+<code cpp>
+virtual void DoEpochEvents(Grid<GC>& grid, u32 epochs, u32 epochAEPS)
+{
+  u32 H = Grid<GC>::GetHeight();
+  u32 W = Grid<GC>::GetWidth();
+  u32 emptyCount = 0;
+  for (u32 y = 0; y < H; ++y)
+  {
+    for (u32 x = 0; x < W; ++x)
     {
-      static OverflowableCharBufferByteSink<500> buf;
+      Tile<CC> & tile = grid.GetTile(SPoint(x,y));
-      buf.Reset();
+       for (u32 x = 0; x < P::TILE_WIDTH; ++x)
-      buf.Printf("%s",this->GetSimulationBasePath());
-      va_list ap;
-      va_start(ap, format);
-      buf.Vprintf(format, ap);
-      if (buf.HasOverflowed())
       {
-        FAIL(OUT_OF_ROOM);
+        for (u32 y = 0; y < P::TILE_WIDTH; ++y)
+        {
+          const SPoint pt(x, y);
+          if(Tile<CC>::IsInCache(pt))
+          {
+            continue;
+          }
+          const T * atom = tile.GetAtom(x,y);
+          //<<<TODO>>> This is where you grab the data from your element. Modify accordingly.
+          if (atom->GetType() == Element_Empty<CC>::THE_INSTANCE.GetType())
+            ++emptyCount;
+        }
       }
-      return buf.GetZString();
     }
-</code cpp>
+  }
+  //<<<TODO>>> replace FILE_NAME with the file name of your choice
+  const char* path = GetSimDirPathTemporary("tbd/FILE_NAME.dat");
+  FILE* fp = fopen(path, "a");
+  //<<<TODO>>> This is where you output the specific data you need. Modify accordingly.
+  fprintf(fp, "%d %d %d\n",epochs, epochAEPS, emptyCount);
+  fclose(fp);
+  // Remember to let the parent run too!
+  Super::DoEpochEvents(grid, epochs, epochAEPS);
+}
+</code>
+Please note: There are 3 TODO tags in the above snippet. These are where you'll need to modify the code to suit your needs.
+====AbstractDriver.h====
+Now we need to do a small modifcation to the AbstractDriver.h file. Paste the following code into the **public** section:
+<code cpp>
+const char * GetSimulationBasePath() const
+{
+  return &m_simDirBasePath[0];
+}
+</code>
+And that's it! Happy scienceing.