[vtkusers] rendring problem

[medamine]

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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