[vtkusers] Convert VRML to VTK ASCII format

[Cory Quammen]

You can't do this:

strcat(vrmlFileName, ".vtk");

You can do this:

vrmlFileName.append(".vtk");

HTH,
Cory

On Tue, Mar 8, 2016 at 12:41 PM, Jose Soto <sotoglzz at gmail.com> wrote:
>
> Dears vtk users:
>
> I'm trying to convert a VRML file to a vtk ASCII format using this code from
> this  vtk topic:
> http://vtk.1045678.n5.nabble.com/Conversion-from-VRML-into-VTK-format-td1243521.html#a1243526
> , here's the code:
>
> #include <vtkVRMLImporter.h>
> #include <vtkDataSet.h>
> #include <vtkActorCollection.h>
> #include <vtkPolyData.h>
> #include <vtkPolyDataWriter.h>
> #include <vtkRenderer.h>
> #include <vtkMapper.h>
>
> int main (int argc, char *argv[]) {
>
> std::string Fichier = argv[1];
> std::string vrmlFileName = argv[2];
>
> vtkVRMLImporter *imp = vtkVRMLImporter::New();
> imp->SetFileName(Fichier.c_str());
> imp->Read();
> imp->Update();
> vtkDataSet *pDataset;
> vtkActorCollection *actors = imp->GetRenderer()->GetActors();
> actors->InitTraversal();
> pDataset = actors->GetNextActor()->GetMapper()->GetInput();
>
> vtkPolyData *polyData = vtkPolyData::SafeDownCast(pDataset);
> polyData->Update();
>
> vtkPolyDataWriter *writer = vtkPolyDataWriter::New();
> strcat(vrmlFileName, ".vtk");
> writer->SetFileName(vrmlFileName);
> writer->SetFileTypeToASCII();
>
> ostream *vtkFile = writer->OpenVTKFile();
> writer->SetHeader("vtkFile");
> writer->WriteHeader(vtkFile);
> *vtkFile << "DATASET POLYDATA\n";
> writer->WritePoints(vtkFile, polyData->GetPoints());
> writer->WriteCells(vtkFile, polyData->GetPolys(), "POLYGONS");
> writer->CloseVTKFile(vtkFile);
>
> return EXIT_SUCCESS;
>
> }
>
> When I'm trying to compile it I get the following errror
>
> [100%] Building CXX object CMakeFiles/VRML.dir/VRML.cxx.o
> /home/trinidad/VRMLConv/VRML.cxx: In function ‘int main(int, const char**)’:
> /home/trinidad/VRMLConv/VRML.cxx:28:28: error: cannot convert ‘std::string
> {aka std::basic_string<char>}’ to ‘char*’ for argument ‘1’ to ‘char*
> strcat(char*, const char*)’
>  strcat(vrmlFileName, ".vtk");
>
> Can someone give me a little help please??
> Thanks, in advance
> José Soto
>
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-- 
Cory Quammen
R&D Engineer
Kitware, Inc.