pFlowToVTK finalized and tested

- geometry conversion now can handle separate vtk files.

utilities/Utilities/vtkFile/vtkFile.cpp

@@ -21,11 +21,14 @@ Licence:
 
 #include "vtkFile.hpp"
 
-bool pFlow::vtkFile::openStream()
+bool pFlow::vtkFile::openStream(bool wHeader)
 {
-	oStream_ = makeUnique<oFstream>( fileName() );
+	oStream_ = makeUnique<oFstream>( fileName(), false, append_ );
 	if( !oStream_ )return false;
-	return writeHeader();
+	if(wHeader)
+		return writeHeader();
+	else
+		return true;
 }
 
 bool pFlow::vtkFile::vtkFile::writeHeader()
@@ -49,15 +52,17 @@ pFlow::vtkFile::vtkFile
 (
 	const fileSystem dir,
 	const word& bName,
-	real time
+	real time,
+	bool append
 )
 :
 	dirPath_(dir),
 	baseName_(bName),
-	time_(time)
+	time_(time),
+	append_(append)
 {
 
-	if(!openStream())
+	if(!openStream(!append))
 	{
 		fatalErrorInFunction <<
 		"  error in creating vtkFile "<<fileName()<<endl;

utilities/Utilities/vtkFile/vtkFile.hpp

@@ -40,15 +40,21 @@ protected:
 
 	real  	   time_ = 0.0;
 
+	bool		append_=false;
+
 	uniquePtr<oFstream>  oStream_= nullptr;
 
-	bool openStream();
+	bool openStream(bool wHeader);
 
 	virtual bool writeHeader();
 
 public:
 
-	vtkFile(const fileSystem dir, const word& bName, real time);
+	vtkFile(
+		const fileSystem dir, 
+		const word& bName, 
+		real time,
+		bool append = false);
 
 	virtual ~vtkFile() = default;
 
@@ -56,7 +62,7 @@ public:
 	{
 		if(!oStream_)
 		{
-			if(!openStream())
+			if(!openStream(!append_))
 			{
 				fatalErrorInFunction<<
 				"  error in opening vtkFile "<< fileName() <<endl;