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<div>Tanks a lot for your quick replay, it has helped :-)</div>
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<div>I tried the whole again with a different file, but an error has occurred:<br/>
Error: memory access violation occurs</div>
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<div>Is there a change to catch this error with VTK?</div>
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<div>Thank you in advance.</div>
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<div style="margin:0 0 10px 0;"><b>Gesendet:</b> Donnerstag, 03. März 2016 um 17:34 Uhr<br/>
<b>Von:</b> "David E DeMarle" <dave.demarle@kitware.com><br/>
<b>An:</b> "Vladi Mitover" <vladi88@gmx.de><br/>
<b>Cc:</b> "vtkusers@vtk.org" <vtkusers@vtk.org><br/>
<b>Betreff:</b> Re: [vtkusers] How can I read a "legacy" ASCII VTK file</div>
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<div>Try changing from polydatamapper to datasetmapper, or pretty much equivalently put a datasetsurfacefilter (named "geometryfilter" in on of the example) in between the reader and the polydatamapper.</div>
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<div>In either case what happens is that the unstructured grid (potentially containing volumetric elements eg tetrahedra) gets converted to a polydata (containing only locally 2D elements eg triangles) which can be drawn by GL.</div>
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<div class="gmail_extra">
<div>
<div class="gmail_signature">David E DeMarle<br/>
Kitware, Inc.<br/>
R&D Engineer<br/>
21 Corporate Drive<br/>
Clifton Park, NY 12065-8662<br/>
Phone: 518-881-4909</div>
</div>
<div class="gmail_quote">On Thu, Mar 3, 2016 at 9:50 AM, Vladi Mitover <span><<a href="vladi88@gmx.de" target="_parent">vladi88@gmx.de</a>></span> wrote:
<blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex;border-left: 1.0px rgb(204,204,204) solid;padding-left: 1.0ex;">
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<div>Hello everyone,</div>
<div> </div>
<div>I use the VTK version 6.3.0-55.5.</div>
<div> </div>
<div>I am trying to do the following: read a "legacy" ASCII VTK file and that file represents an example of an unstructured grid in 3D, as done in the following VTK/Cxx-examples:</div>
<div>1)To read "legacy" ASCII VTK file: <br/>
<a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/IO/GenericDataObjectReader" target="_blank">http://www.vtk.org/Wiki/VTK/Examples/Cxx/IO/GenericDataObjectReader</a><br/>
I have included vtkGenericDataObjectReader.h, vtkPolyData.h, string</div>
<div>2)To make a 3DPlot:<br/>
<a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/IO/ReadPLOT3D" target="_blank">http://www.vtk.org/Wiki/VTK/Examples/Cxx/IO/ReadPLOT3D</a><br/>
Here I change the vtkStructuredGridGeometryFilter.h to vtkUnstructuredGridReader.h</div>
<div>3)To read unstructured Grid:<br/>
<a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/IO/ReadUnstructuredGrid" target="_blank">http://www.vtk.org/Wiki/VTK/Examples/Cxx/IO/ReadUnstructuredGrid</a><br/>
</div>
<div>When I build it, it looks as if everything was okay but when I play it, in the opening window nothing is to see.</div>
<div>Below is my code:</div>
<div><br/>
#include <vtkVersion.h><br/>
#include <vtkPolyData.h><br/>
#if VTK_MAJOR_VERSION <= 5<br/>
#include <vtkPLOT3DReader.h><br/>
#else<br/>
#include <vtkMultiBlockPLOT3DReader.h><br/>
#include <vtkMultiBlockDataSet.h><br/>
#endif<br/>
#include <vtkSmartPointer.h><br/>
#include <vtkPolyDataMapper.h><br/>
#include <vtkActor.h><br/>
#include <vtkRenderWindow.h><br/>
#include <vtkRenderer.h><br/>
#include <vtkRenderWindowInteractor.h></div>
<div>//===============================================<br/>
//Header from example GenericDataObjectReader.cxx<br/>
//===============================================<br/>
#include <vtkGenericDataObjectReader.h><br/>
#include <vtkPolyData.h><br/>
#include <string></div>
<div>//=============================================<br/>
//Header from example ReadUnstructuredGrid.cxx<br/>
//=============================================<br/>
#include <vtkUnstructuredGridReader.h><br/>
#include <vtkDataSetMapper.h></div>
<div> </div>
<div>using namespace std;</div>
<div>int main (int argc, char *argv[])<br/>
{<br/>
<br/>
//Ensure a filename was specified<br/>
if(argc != 2)<br/>
{<br/>
std::cerr << "Usage: " << argv[0] << " InputFilename(.vtk)" << endl;<br/>
return EXIT_FAILURE;<br/>
}<br/>
<br/>
//Get the filename from the command line<br/>
std::string inputFilename = argv[1];<br/>
<br/>
//Read all the data from the file<br/>
vtkSmartPointer<vtkUnstructuredGridReader> reader =<br/>
vtkSmartPointer<vtkUnstructuredGridReader>::New();<br/>
reader->SetFileName(inputFilename.c_str());<br/>
reader->Update(); <br/>
<br/>
//Visualize<br/>
vtkSmartPointer<vtkPolyDataMapper> mapper =<br/>
vtkSmartPointer<vtkPolyDataMapper>::New();<br/>
// mapper->SetInputConnection(geometryFilter->GetOutputPort());<br/>
mapper->SetInputConnection(reader->GetOutputPort());<br/>
mapper->ScalarVisibilityOff();<br/>
<br/>
vtkSmartPointer<vtkActor> actor =<br/>
vtkSmartPointer<vtkActor>::New();<br/>
actor->SetMapper(mapper);<br/>
<br/>
//Create a renderer, render window, and interactor<br/>
vtkSmartPointer<vtkRenderer> renderer =<br/>
vtkSmartPointer<vtkRenderer>::New();<br/>
vtkSmartPointer<vtkRenderWindow> renderWindow =<br/>
vtkSmartPointer<vtkRenderWindow>::New();<br/>
renderWindow->AddRenderer(renderer);<br/>
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =<br/>
vtkSmartPointer<vtkRenderWindowInteractor>::New();<br/>
renderWindowInteractor->SetRenderWindow(renderWindow);<br/>
<br/>
renderer->AddActor(actor);<br/>
renderer->SetBackground(.3, .6, .3); // Background color green<br/>
<br/>
renderWindow->Render();<br/>
renderWindowInteractor->Start();<br/>
<br/>
return EXIT_SUCCESS;<br/>
}</div>
<div> </div>
<div> </div>
<div> </div>
<div>What is wrong? Can anyone help?</div>
<div> </div>
<div>Thank you very much in advance.</div>
<div> </div>
<div>And here the file</div>
<div> </div>
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