[vtkusers] How can I get a combination of Glyph3D and Follower?

[Sylvain Jaume]

Hi Rob,

You could execute the pipeline for every landmark point:

double *point;
vtkPoints *newPoints;
vtkPolyData *newPolyData;
vtkGlyph3D *glyph3D;
vtkPolyDataMapper *polyDataMapper;
vtkFollower *follower;
vtkSphereSource *sphereSource = vtkSphereSource::New();
vtkRenderer *renderer = vtkRenderer::New();

for (int i=0; i<numPoints; i++ )
{
  point = landmarkPolyData->GetPoint(i);

  newPoints = vtkPoints::New();
  newPoints->InsertNextPoint(point);

  newPolyData = vtkPolyData::New();
  newPolyData->SetPoints(newPoints);
  newPoints->Delete();

  glyph3D = vtkGlyph3D::New();
  glyph3D->SetInput(newPolyData);
  newPolyData->Delete();
 
  polyDataMapper = vtkPolyDataMapper::New();
  polyDataMapper->SetInput(glyph3D->GetOutput());
  glyph3D->Delete();

  follower = vtkFollower::New();
  follower->SetMapper(polyDataMapper);
  polyDataMapper->Delete();

  renderer->AddActor(follower);
  follower->Delete();
}

vtkRenderWindow *renderWindow = vtkRenderWindow::New();
renderWindow->AddRender(renderer);
renderer->Delete();
renderWindow->Render();

Cheers,
Sylvain

Day, Robert wrote:

>Hi Sylvain,
>
>Yes I did, as it was the obvious thing to do.  That makes my point cloud rotate (around its centre ?) as a whole to follow the camera, moving the glyphs away from where they are supposed to be.
>
>What I need is for each glyph to rotate around its centre so that they face the camera but keep their proper positions.
>
>Rob.
>
>  
>
>>-----Original Message-----
>>From: Sylvain Jaume [mailto:sylvain.jaume at kitware.com]
>>Sent: Tuesday, 8 November 2005 8:04 PM
>>To: Day, Robert
>>Cc: vtkusers at vtk.org
>>Subject: Re: [vtkusers] How can I get a combination of Glyph3D and
>>Follower?
>>
>>
>>Hi Rob,
>>
>>Have you tried vtkGlyph3D -> vtkPolyDataMapper -> vtkFollower ?
>>
>>Cheers,
>>Sylvain
>>
>>    
>>
><snip>
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