[vtkusers] Render image and points

[chensiqi]

Hi, VTKers.
 
I want to render a 2D image and some points over it. But somehow the points are not rendered at all.  I attach the code here, if someone could go over it and point out where I was wrong, your help would be highly appreciated. 
 
// Create polydatamapper
 vtkCellArray *verts = vtkCellArray::New(); for( int i=0; i<points->GetNumberOfPoints(); i++)          verts->InsertNextCell(1, &i );  // each cell contains only one point
 // Create a PolyData dummy variable vtkPolyData *dummyPolyData = vtkPolyData::New();  dummyPolyData->SetPoints( points );   // points are vtkPoints type and known ahead dummyPolyData->SetVerts( verts );
 vtkPolyDataMapper *pointsMapper = vtkPolyDataMapper::New(); pointsMapper->SetInput( dummyPolyData ); pointsMapper->ScalarVisibilityOff();
 vtkActor *pointsActor = vtkActor::New(); pointsActor->SetMapper( pointsMapper );
 
// Create imageMapper
 vtkImageMapper * imageMapper = vtkImageMapper::New(); imageMapper->SetInput( image );     // image is vtkImageData type and known ahead imageMapper->SetColorLevel( 0 ); imageMapper->SetColorWindow( 512 );
 vtkActor2D *imageActor = vtkActor2D::New();
 imageActor->SetMapper( imageMapper ); 
 
// Create Renderer, Window, Interactor and etc
 vtkRenderer *ren = vtkRenderer::New();
 ren->AddActor(pointsActor);
 ren->AddActor(imageActor);
 vtkRenderWindowInteractor * Interactor = vtkRenderWindowInteractor::New();  vtkRenderWindow * RenderWindow = vtkRenderWindow::New();  RenderWindow->SetSize(512,512);  RenderWindow->SetInteractor(Interactor);  RenderWindow->AddRenderer(ren); 
 RenderWindow->Render();
 Interactor->Start();
 
Thanks
Siqi
 
 
 

_________________________________________________________________
微软地图率先推出跨城市多点驾车路线查询！
http://ditu.live.com/?form=MRAHAB&rtp=pos.30.454167_116.308611_%E5%A4%AA%E6%B9%96__~pos.29.554046_115.983427_%E5%BA%90%E5%B1%B1__~pos.29.116111_110.478889_%E5%BC%A0%E5%AE%B6%E7%95%8C__&rtop=0~0~0&encType=1
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20090114/77d38cb1/attachment.htm>