[vtkusers] rendring problem

[Amy Squillacote]

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