ENH: snappyHexMesh: added option to check mesh

applications/utilities/mesh/generation/snappyHexMesh/snappyHexMesh.C

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2012 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -46,6 +46,8 @@ Description
 #include "snapParameters.H"
 #include "layerParameters.H"
 
+#include "faceSet.H"
+#include "motionSmoother.H"
 
 using namespace Foam;
 
@@ -122,6 +124,13 @@ int main(int argc, char *argv[])
 {
 #   include "addOverwriteOption.H"
 
+    Foam::argList::addBoolOption
+    (
+        "checkOnly",
+        "check existing mesh against snappyHexMeshDict settings"
+    );
+
+
 #   include "setRootCase.H"
 #   include "createTime.H"
     runTime.functionObjects().off();
@@ -132,24 +141,13 @@ int main(int argc, char *argv[])
 
     const bool overwrite = args.optionFound("overwrite");
 
+    const bool checkOnly = args.optionFound("checkOnly");
+
     // Check patches and faceZones are synchronised
     mesh.boundaryMesh().checkParallelSync(true);
     meshRefinement::checkCoupledFaceZones(mesh);
 
 
-    // Read decomposePar dictionary
-    IOdictionary decomposeDict
-    (
-        IOobject
-        (
-            "decomposeParDict",
-            runTime.system(),
-            mesh,
-            IOobject::MUST_READ_IF_MODIFIED,
-            IOobject::NO_WRITE
-        )
-    );
-
     // Read meshing dictionary
     IOdictionary meshDict
     (
@@ -186,6 +184,51 @@ int main(int argc, char *argv[])
     );
 
 
+    if (checkOnly)
+    {
+        Info<< "Checking initial mesh ..." << endl;
+        faceSet wrongFaces(mesh, "wrongFaces", mesh.nFaces()/100);
+        motionSmoother::checkMesh(false, mesh, motionDict, wrongFaces);
+
+        const label nInitErrors = returnReduce
+        (
+            wrongFaces.size(),
+            sumOp<label>()
+        );
+
+        Info<< "Detected " << nInitErrors << " illegal faces"
+            << " (concave, zero area or negative cell pyramid volume)"
+            << endl;
+
+        if (nInitErrors > 0)
+        {
+            Info<< "Writing " << nInitErrors
+                << " faces in error to set "
+                << wrongFaces.name() << endl;
+            wrongFaces.instance() = mesh.pointsInstance();
+            wrongFaces.write();
+        }
+
+        Info<< "End\n" << endl;
+
+        return 0;
+    }
+
+
+    // Read decomposePar dictionary
+    IOdictionary decomposeDict
+    (
+        IOobject
+        (
+            "decomposeParDict",
+            runTime.system(),
+            mesh,
+            IOobject::MUST_READ_IF_MODIFIED,
+            IOobject::NO_WRITE
+        )
+    );
+
+
     // Debug
     // ~~~~~