[vtkusers] rendring problem

[Amy Squillacote]

Please keep the discussion on the vtkusers mailing list rather than
emailing me directly. That way the discussion is archived and other
people can contribute to finding a solution to your problem.

Also, please describe in more detail what run-time problem you're
seeing. Is there an error or warning message displayed? Does the program
crash? (If so, a stack trace would be helpful.)

- Amy

Miladi Med Amine wrote:
> i tried to do this;but the problem inthe running there is a beug in 
> vtkcellarray.h.
> what's wrong.
> Thanks
>
> */Amy Squillacote <amy.squillacote at kitware.com>/* a écrit :
>
>     Sorry, I must have gotten in a hurry when I typed that. I meant
>     vtkIdType.
>
>     - Amy
>
>     medamine wrote:
>     > Thanks
>     > do you mean vtkIdTypes?because using vtkCellType i get an error
>     that did not
>     > exist(vtkCellType.h is included).
>     > so i do this:
>     > vtkIdTypes cellId = i;
>     > m_polydata->InsertNextCell(VTK_VERTEX, 1, &cellId);
>     > but, the debugger is declanched.
>     >
>     >
>     > Amy Squillacote wrote:
>     >
>     >> In VTK, you must have cells to render. If your dataset only
>     contains
>     >> points and you want to render points, you will need to create a
>     >> vtkVertex cell per point in your dataset. The code to do that
>     would look
>     >> something like the following.
>     >>
>     >> Inside your while loop, before the line "i++;", add these lines.
>     >>
>     >> vtkCellType cellId = i;
>     >> m_polydata->InsertNextCell(VTK_VERTEX, 1, &cellId);
>     >>
>     >> - Amy
>     >>
>     >> medamine wrote:
>     >>
>     >>> Hi;
>     >>> i'm trying to create a mesh from .txt file in witch i have only
>     >>> points.after
>     >>> creation i get a mesh with 1024 pts but nothing appear in the
>     screan when
>     >>> rendring.
>     >>> Thanks
>     >>>
>     >>> FILE *fp;
>     >>> float x=0;
>     >>> float y=0;
>     >>> float z=0;
>     >>> const float p[3]={0,0,0};
>     >>> char *c;
>     >>> int i=0;
>     >>> vtkPolyData *m_polydata=vtkPolyData::New();
>     >>> vtkPoints *points = vtkPoints::New();
>     >>> float pts[3]={10,10,10};
>     >>> if((fp=fopen(resfile,"r"))==NULL)
>     >>> { printf("Le fichier FILES ne veut pas s'ouvrire! \n"); exit(1);}
>     >>> while(!feof(fp))
>     >>> { fscanf(fp,"%c %f %f %f",&c,&x,&y,&z);
>     >>> pts[0]=x;pts[1]=y;pts[2]=z;
>     >>> points->InsertPoint(i,pts);
>     >>> i++;
>     >>> }
>     >>> m_polydata->SetPoints(points);
>     >>> m_polydata->Update();
>     >>>
>     >>> vtkPolyDataWriter *writer=vtkPolyDataWriter::New();
>     >>> writer->SetFileName(plyfile);
>     >>> writer->SetInput(m_polydata);
>     >>> writer->Update();
>     >>>
>     >>> /////////test visualisation
>     >>> vtkPolyDataMapper *m_polydataMapper = vtkPolyDataMapper::New();
>     >>> m_polydataMapper->SetInput(m_polydata);
>     >>> // m_polydataMapper->SetScalarRange(0,256);
>     >>> vtkActor *m_Actor = vtkActor::New();
>     >>> m_Actor->SetMapper(m_polydataMapper);
>     >>> //m_Actor->GetProperty()->SetRepresentationToPoints();
>     >>> m_Actor->GetProperty()->SetColor(1, 0, 0);
>     >>> // m_Actor->GetProperty()->SetDiffuseColor(1,1,1);
>     >>> vtkRenderer *m_renderer = vtkRenderer::New();
>     >>> vtkRenderWindow *m_renWin = vtkRenderWindow::New();
>     >>> m_renWin->AddRenderer(m_renderer);
>     >>> vtkRenderWindowInteractor *m_iren =
>     vtkRenderWindowInteractor::New();
>     >>> m_iren->SetRenderWindow(m_renWin);
>     >>> vtkInteractorStyleTrackballCamera *m_style =
>     >>> vtkInteractorStyleTrackballCamera::New();
>     >>> m_iren->SetInteractorStyle(m_style);
>     >>> m_renderer->AddActor(m_Actor);
>     >>> m_renderer->SetBackground(0, 0, 0);
>     >>> m_renWin->SetSize(300,300);
>     >>> m_renWin->Render();
>     >>> m_iren->Start();
>     >>> //Free
>     >>> m_polydata->Delete();
>     >>> m_polydataMapper->Delete();
>     >>> m_Actor->Delete();
>     >>> m_renderer->Delete();
>     >>> m_renWin->Delete();
>     >>> m_iren->Delete();
>     >>>
>     >>>
>     >> --
>     >> Amy Squillacote
>     >> Kitware, Inc.
>     >> 28 Corporate Drive
>     >> Clifton Park, NY 12065
>     >> Phone: (518) 371-3971 x106
>     >>
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>     >>
>     >>
>     >
>     >
>
>     -- 
>     Amy Squillacote
>     Kitware, Inc.
>     28 Corporate Drive
>     Clifton Park, NY 12065
>     Phone: (518) 371-3971 x106
>
>
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-- 
Amy Squillacote
Kitware, Inc.
28 Corporate Drive
Clifton Park, NY 12065
Phone: (518) 371-3971 x106