foamToEnsightParts updated

- handle new cloud locations, got missed before the release
  - handle multiple clouds
  - more efficient checking of fields etc.
  - write case file at the end, thus we can potentially
    do something more intelligent about the time set handling

applications/utilities/postProcessing/dataConversion/foamToEnsightParts/findFields.H

@@ -0,0 +1,88 @@
+// check the final time directory for
+
+// 1. volume fields
+HashTable<word> volumeFields;
+
+// 2. the fields for each cloud:
+HashTable<HashTable<word> > cloudFields;
+
+if (timeDirs.size() > 1)
+{
+    IOobjectList objs(mesh, timeDirs[timeDirs.size()-1].name());
+
+    forAllConstIter(IOobjectList, objs, fieldIter)
+    {
+        const IOobject& obj = *fieldIter();
+
+        if
+        (
+            obj.headerClassName() == volScalarField::typeName
+         || obj.headerClassName() == volVectorField::typeName
+        )
+        {
+            // Add field and field type
+            volumeFields.insert
+            (
+                obj.name(),
+                obj.headerClassName()
+            );
+        }
+    }
+
+    // now check for lagrangian/<cloudName>
+
+    fileNameList cloudDirs = readDir
+    (
+        runTime.path()
+      / timeDirs[timeDirs.size() - 1].name()
+      / regionPrefix
+      / "lagrangian",
+        fileName::DIRECTORY
+    );
+
+    forAll(cloudDirs, cloudI)
+    {
+        const word& cloudName = cloudDirs[cloudI];
+
+        // Create a new hash table for each cloud
+        cloudFields.insert(cloudName, HashTable<word>());
+
+        // Identify the new cloud in the hash table
+        HashTable<HashTable<word> >::iterator cloudIter =
+            cloudFields.find(cloudName);
+
+        IOobjectList cloudObjs
+        (
+            mesh,
+            timeDirs[timeDirs.size() - 1].name(),
+            "lagrangian"/cloudName
+        );
+
+        bool hasPositions = false;
+        forAllConstIter(IOobjectList, cloudObjs, fieldIter)
+        {
+            const IOobject obj = *fieldIter();
+
+            if (obj.name() == "positions")
+            {
+                hasPositions = true;
+            }
+            else
+            {
+                // Add field and field type
+                cloudIter().insert
+                (
+                    obj.name(),
+                    obj.headerClassName()
+                );
+            }
+        }
+
+        // drop this cloud if it has no positions
+        if (!hasPositions)
+        {
+            cloudFields.erase(cloudIter);
+        }
+    }
+}
+