[vtkusers] graph
debbie larson
debbielarson_9 at hotmail.com
Fri Jun 1 13:59:38 EDT 2007
Thanks Brian. Yes that did change things. But regarding your code below, I
get an error message on
vtkSimple2DLayoutStrategy::SafeDownCast(strategy)
> ->vtkSetJitter(false);
(doesnt know about vtkSetJitter). Also how can I get rid of the gliphs that
represent the vertices?
I basically want to see a graph whose layout looks like this
**
/ \
** **
\ /
**
Is this possible?
Thanks
deb
>From: "Wylie, Brian" <bnwylie at sandia.gov>
>To: "debbie larson" <debbielarson_9 at hotmail.com>,vtkusers at vtk.org
>Subject: RE: [vtkusers] graph
>Date: Fri, 1 Jun 2007 11:18:08 -0600
>
>Hmmmm...
>
>Well good news and bad news....
>
>The good news is that in our sandbox we have a vtkPassThrough strategy
>that doesn't change the position of the vertices at all... The bad news
>is that it's not yet in vtk. :(
>
>I think the best way to "hack" it until we get that in VTK (like 2 weeks
>from now probably) is to do the following....
>
>In vtkGraphLayoutViewer.cxx line 415 ish...
>
> else if (!strcmp(strategyName, "Simple2D"))
> {
> strategy = vtkSimple2DLayoutStrategy::New();
> vtkSimple2DLayoutStrategy::SafeDownCast(strategy)
> ->SetMaxNumberOfIterations(100);
> vtkSimple2DLayoutStrategy::SafeDownCast(strategy)
> ->SetIterationsPerLayout(100);
> vtkSimple2DLayoutStrategy::SafeDownCast(strategy)
> ->SetInitialTemperature(1);
> }
>
>Change to something like....
>
> else if (!strcmp(strategyName, "Simple2D"))
> {
> strategy = vtkSimple2DLayoutStrategy::New();
> vtkSimple2DLayoutStrategy::SafeDownCast(strategy)
> ->SetMaxNumberOfIterations(0);
> vtkSimple2DLayoutStrategy::SafeDownCast(strategy)
> ->SetIterationsPerLayout(0);
> vtkSimple2DLayoutStrategy::SafeDownCast(strategy)
> ->SetInitialTemperature(0);
> vtkSimple2DLayoutStrategy::SafeDownCast(strategy)
> ->vtkSetJitter(false);
> }
>
>This means the layout basically shouldn't DO anything
>
>
>Should work.... Sorry for making you hack the code... Like I said the
>'pass-through' strategy should be in soon....
>
> Brian Wylie - Org 1424
> Sandia National Laboratories
> MS 0822 - Building 880/A1-J
> (505)844-2238 FAX(505)845-0833
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> VTK Informatics Toolkit
>
>
> > -----Original Message-----
> > From: vtkusers-bounces+bnwylie=sandia.gov at vtk.org
> > [mailto:vtkusers-bounces+bnwylie=sandia.gov at vtk.org] On
> > Behalf Of debbie larson
> > Sent: Friday, June 01, 2007 10:44 AM
> > To: vtkusers at vtk.org
> > Subject: Re: [vtkusers] graph
> >
> > Hi,
> >
> > I tried to set the coordinates of the vertices and then
> > visualize the graph with vtkGraphLayout but it seems it
> > doesnt care about the positions of the vertices. I must be
> > missing something when I set the coordinates of those
> > vertices. But what? Here it is the code
> >
> > //Add vertices
> > VTK_CREATE(vtkPoints,pts);
> > VTK_CREATE(vtkGraph,graph);
> > graph->AddVertex();
> > for loop
> > pts->InsertNextPoint(x,y,0);
> > graph->AddVertex();
> > end loop
> > graph->SetPoints(pts);
> >
> > //Add Edges
> > for loop
> > graph->AddEdge(v,p);
> > end loop
> >
> > //view
> > VTK_CREATE(vtkGraphLayoutViewer,viewer);
> > viewer->SetInput(graph);
> > viewer->SetLayoutStrategy("Simple2D");//Tried also ForceDirected
> >
> > VTK_CREATE(vtkRenderer,ren);
> > VTK_CREATE(vtkRenderWindow,win);
> > win->AddRenderer(ren);
> > VTK_CREATE(vtkRenderWindowInteractor,interact);
> > interact->SetRenderWindow(win);
> > viewer->SetRenderWindow(win);
> > win->GetInteractor()->Initialize();
> > win->GetInteractor()->Start();
> >
> >
> > Thanks
> >
> > deb
> > >From: "Jeff Baumes" <jeff.baumes at kitware.com>
> > >To: "debbie larson" <debbielarson_9 at hotmail.com>
> > >CC: vtkusers at vtk.org
> > >Subject: Re: [vtkusers] graph
> > >Date: Thu, 31 May 2007 09:17:22 -0400
> > >
> > >If you use the CVS version of VTK, the following should give you a
> > >start. Recyclying the vertex points and using a low initial
> > >temperature on the layout strategy gives a jittery but reasonable
> > >dynamic layout. I should also point you to
> > vtkGraphLayoutViewer, which
> > >wraps most of this stuff up (but doesn't allow access to the inner
> > >workings to do the dynamic graph layout like this), and to
> > >vtkDynamic2DLabelMapper in VTK/Graphics if you want to label the
> > >vertices.
> > >
> > >I'm using the simple macro
> > >#define VTK_CREATE(type, name) \
> > > vtkSmartPointer<type> name = vtkSmartPointer<type>::New()
> > >
> > >int main()
> > >{
> > > // Create initial cycle graph
> > > VTK_CREATE(vtkGraph, graph);
> > > for (int i = 0; i < 100; i++)
> > > {
> > > graph->AddEdge(i, (i+1)%100);
> > > }
> > >
> > > // Set up graph layout pipeline
> > > VTK_CREATE(vtkSimple2DLayoutStrategy, strategy);
> > > strategy->SetInitialTemperature(0.5);
> > > VTK_CREATE(vtkGraphLayout, layout);
> > > layout->SetInput(graph);
> > > layout->SetLayoutStrategy(strategy);
> > > VTK_CREATE(vtkGraphToPolyData, poly);
> > > poly->SetInputConnection(layout->GetOutputPort());
> > > VTK_CREATE(vtkPolyDataMapper, mapper);
> > > mapper->SetInputConnection(poly->GetOutputPort());
> > > VTK_CREATE(vtkActor, actor);
> > > actor->SetMapper(mapper);
> > > VTK_CREATE(vtkGlyphSource2D, glyphSource);
> > > glyphSource->SetGlyphTypeToVertex();
> > > VTK_CREATE(vtkGlyph3D, glyph);
> > > glyph->SetInputConnection(0, poly->GetOutputPort());
> > > glyph->SetInputConnection(1, glyphSource->GetOutputPort());
> > > VTK_CREATE(vtkPolyDataMapper, vmapper);
> > > vmapper->SetInputConnection(glyph->GetOutputPort());
> > > VTK_CREATE(vtkActor, vactor);
> > > vactor->SetMapper(vmapper);
> > > vactor->GetProperty()->SetPointSize(5);
> > > vactor->GetProperty()->SetColor(1, 0, 0);
> > >
> > > // Setup renderer / render window
> > > VTK_CREATE(vtkRenderer, ren);
> > > VTK_CREATE(vtkRenderWindow, win);
> > > win->AddRenderer(ren);
> > > VTK_CREATE(vtkRenderWindowInteractor, iren);
> > > iren->SetRenderWindow(win); VTK_CREATE(vtkInteractorStyleImage,
> > > style); iren->SetInteractorStyle(style); ren->AddActor(actor);
> > > ren->AddActor(vactor); iren->Initialize();
> > >
> > > // Render in a loop
> > > for (int i = 0; i < 400; i++)
> > > {
> > > // Start the layout with the existing layout
> > > graph->SetPoints(layout->GetOutput()->GetPoints());
> > > graph->AddEdge((int)(vtkMath::Random()*100),
> > >(int)(vtkMath::Random()*100));
> > > graph->Modified();
> > > ren->ResetCamera();
> > > iren->Render();
> > > }
> > > iren->Start();
> > > return 0;
> > >}
> > >
> > >Jeff
> > >
> > >On 5/28/07, debbie larson <debbielarson_9 at hotmail.com> wrote:
> > >>Hi,
> > >>
> > >>I would like to plot an evolving (directed) graph. I.e. I
> > would like
> > >>to display it as nodes and edges are added. The graph is
> > being updated
> > >>by some computer code and I want to redraw the graph after a few
> > >>node/edge additions to see how it is evolving. I would like
> > to display
> > >>it in a 2D layout (hopefully without edges intersecting
> > each other).
> > >>Can this be done in vtk?
> > >>Any pointers would be appreciated.
> > >>
> > >>Thanks
> > >>
> > >>deb
> > >>
> > >>_________________________________________________________________
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> > >>_______________________________________________
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> > >>Please keep messages on-topic. Check the FAQ at:
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> > >>
> > >
> > >
> > >--
> > >Jeff Baumes
> > >R&D Engineer, Kitware Inc.
> > >(518) 371-3971 x132
> > >jeff.baumes at kitware.com
> >
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