[vtkusers] Fill giant holes in a mesh

[daviddoria]

I saw this: vtkDataSetSurfaceFilter. The description reads like it is exactly
what I want.  I give it a point cloud and it seems to produce exactly the
same point cloud (ie no surface).

This is what I tried:

	vtkXMLPolyDataReader* reader = vtkXMLPolyDataReader::New();
	reader->SetFileName(InputFile.c_str());
	reader->Update();
	
	vtkDataSetSurfaceFilter* DSSF = vtkDataSetSurfaceFilter::New();

	DSSF->SetInputConnection(reader->GetOutputPort());
	//cout << DSSF->GetUseStrips() << endl;
	DSSF->UseStripsOn();
	
	DSSF->Update();

	vtkXMLPolyDataWriter* writer = vtkXMLPolyDataWriter::New();
	writer->SetInputConnection(DSSF->GetOutputPort());
	writer->SetFileName(OutputFile.c_str());
	writer->Update();
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