ENH: suppress cell/patch/proc ids for foamToVTK (#1230)

- reduces output size, consistent with vtkWrite function object

STYLE: mark some foamToVTK options as advanced (ie, visible with -help-full)

applications/utilities/postProcessing/dataConversion/foamToVTK/convertProcessorPatches.H

@@ -121,14 +121,20 @@ Description
     {
         for (vtk::patchWriter& writer : patchWriters)
         {
+            // Optionally with patchID, procID, neighID fields
+            // - use Pstream::parRun() not writer.parallel() !!
             writer.beginCellData
             (
-                1 + (Pstream::parRun() ? 2 : 0)
+                (withMeshIds ? 1 + (Pstream::parRun() ? 2 : 0) : 0)
               + nVolFields
             );
-            writer.writePatchIDs();
-            writer.writeProcIDs();
-            writer.writeNeighIDs();
+
+            if (withMeshIds)
+            {
+                writer.writePatchIDs();
+                writer.writeProcIDs();  // parallel only
+                writer.writeNeighIDs(); // parallel only
+            }
         }
 
         writeAllVolFields

applications/utilities/postProcessing/dataConversion/foamToVTK/convertVolumeFields.H

@@ -262,22 +262,35 @@ Description
         // Begin CellData
         if (internalWriter.valid())
         {
-            // cellIds + procIds (parallel)
+            // Optionally with cellID and procID fields
             internalWriter->beginCellData
             (
-                1 + (internalWriter->parallel() ? 1 : 0)
+                (withMeshIds ? 1 + (internalWriter->parallel() ? 1 : 0) : 0)
               + nVolFields + nDimFields
             );
-            internalWriter->writeCellIDs();
-            internalWriter->writeProcIDs(); // parallel only
+
+            if (withMeshIds)
+            {
+                internalWriter->writeCellIDs();
+                internalWriter->writeProcIDs(); // parallel only
+            }
         }
 
         if (nVolFields)
         {
             for (vtk::patchWriter& writer : patchWriters)
             {
-                writer.beginCellData(1 + nVolFields);
-                writer.writePatchIDs();
+                // Optionally with patchID field
+                writer.beginCellData
+                (
+                    (withMeshIds ? 1 : 0)
+                  + nVolFields
+                );
+
+                if (withMeshIds)
+                {
+                    writer.writePatchIDs();
+                }
             }
         }
 

applications/utilities/postProcessing/dataConversion/foamToVTK/foamToVTK.C

@@ -91,6 +91,9 @@ Usage
       - \par -no-point-data
         Suppress conversion of pointFields. No interpolated PointData.
 
+      - \par -with-ids
+        Additional mesh id fields (cellID, procID, patchID)
+
       - \par -with-point-ids
         Additional pointID field for internal mesh
 
@@ -271,7 +274,8 @@ int main(int argc, char *argv[])
     argList::addBoolOption
     (
         "legacy",
-        "Write legacy format instead of xml"
+        "Write legacy format instead of xml",
+        true  // mark as an advanced option
     );
     argList::addBoolOption
     (
@@ -323,7 +327,8 @@ int main(int argc, char *argv[])
         "faceZones",
         "wordRes",
         "Specify single or multiple faceZones to write\n"
-        "Eg, 'cells' or '( slice \"mfp-.*\" )'."
+        "Eg, 'cells' or '( slice \"mfp-.*\" )'.",
+        true  // mark as an advanced option
     );
 
     argList::addOption
@@ -382,10 +387,18 @@ int main(int argc, char *argv[])
     );
     argList::addOptionCompat("no-point-data", {"noPointValues", 1806});
 
+    argList::addBoolOption
+    (
+        "with-ids",
+        "Additional mesh id fields (cellID, procID, patchID)",
+        true  // mark as an advanced option
+    );
+
     argList::addBoolOption
     (
         "with-point-ids",
-        "Additional pointID field for internal mesh"
+        "Additional pointID field for internal mesh",
+        true  // mark as an advanced option
     );
 
     argList::addBoolOption
@@ -517,6 +530,12 @@ int main(int argc, char *argv[])
         Info<< nl;
     }
 
+    const bool withMeshIds = args.found("with-ids");
+    if (withMeshIds)
+    {
+        Info<< "Writing mesh ids (cell, patch, proc) requested" << nl;
+    }
+
     wordRes includePatches, excludePatches;
     if (doBoundary)
     {