<div dir="ltr"><div><div><div>Thank you, Utkarsh,<br></div>the time for writing our last posts has overlapped. I had fixed the missing UpdateVTKObjects() call in between, and I think the only missing step is to add the sphere's representation to the view proxy.<br>But how do I add it to the Representations "property"? Neither vtkSMViewProxy nor vtkSMRenderViewProxy have a method like GetRepresentations() or InsertRepresentation(). Getting this final step right will certainly help me understand the programming principle.<br><br>If the vtkSMParaViewPipleineControllerWithRendering is the recommended way of remotely rendering objects, I'll definitely appreciate an example using this class, if it doesn't cost you too much time.<br><br></div>Thanks<br></div>Peter<br><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Apr 21, 2016 at 3:42 PM, Utkarsh Ayachit <span dir="ltr"><<a href="mailto:utkarsh.ayachit@kitware.com" target="_blank">utkarsh.ayachit@kitware.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Peter,<br>
<br>
After a proxy is created or after any of its properties are changed,<br>
one must call "vtkSMProxy::UpdateVTKObject()" to push the changes made<br>
locally to the server or the underlying VTK objects. Try putting a<br>
call to this method the NewProxy(...) calls. You're also missing<br>
adding the Sphere source's representation to the View proxy's<br>
"Representations" property. Other option is to use the<br>
vtkSMParaViewPipleineControllerWithRendering.<br>
<br>
Give me a few hours, and I can put together an example that uses the<br>
controller to create a view and show something in it to get you<br>
started.<br>
<span class=""><font color="#888888"><br>
Utkarsh<br>
</font></span><div class=""><div class="h5"><br>
<br>
<br>
On Thu, Apr 21, 2016 at 8:49 AM, Peter Vogt <<a href="mailto:vogtpeter5@gmail.com">vogtpeter5@gmail.com</a>> wrote:<br>
> Hello again,<br>
> thanks to your help, I was able to establish a connection to a pvserver and<br>
> create a SphereSource proxy. Now I cannot figure out how to view the<br>
> rendered scene on the client.<br>
><br>
> My attempt, "TestConnection.cxx", is attached below. I have tried three<br>
> alternatives, which I have marked in the code:<br>
> Alternative 1 calls "view->StillRender()", which shows the greyish<br>
> background, maybe because the sphere is outside the viewport?<br>
> Alternative 2 calls "view->ResetCamera()" before the StillRender(), but<br>
> ResetCamera crashes with the following output:<br>
>>ERROR: In<br>
>> /opt/ParaView-v5.0.1-source/ParaViewCore/ServerImplementation/Core/vtkPVSessionCoreInterpreterHelper.cxx,<br>
>> line 63<br>
>>vtkPVSessionCoreInterpreterHelper (0x976950): No vtkSIProxy for id : 257<br>
>><br>
>>ERROR: In<br>
>> /opt/ParaView-v5.0.1-source/ParaViewCore/ServerImplementation/Core/vtkPVSessionCore.cxx,<br>
>> line 390<br>
>>vtkPVSessionCore (0x8ca480): Wrapper function not found for class "(vtk<br>
>> object is NULL)".<br>
>>while processing<br>
>>Message 0 = Invoke<br>
>> Argument 0 = stream_value {<br>
>> Message 0 = Invoke<br>
>> Argument 0 = id_value {1}<br>
>> Argument 1 = string_value {GetVTKObject}<br>
>> Argument 2 = uint32_value {257}<br>
>> }<br>
>> Argument 1 = string_value {ResetCamera}<br>
>><br>
>><br>
>>ERROR: In<br>
>> /opt/ParaView-v5.0.1-source/ParaViewCore/ServerImplementation/Core/vtkPVSessionCore.cxx,<br>
>> line 391<br>
>>vtkPVSessionCore (0x8ca480): Aborting execution for debugging purposes.<br>
>><br>
>>############ ABORT #############<br>
>>Wrong tag but don't know how to handle it... 188971<br>
>>Aborted (core dumped)<br>
> Alternative 3 tries to show an interactive RenderWindow, but crashes,<br>
> because view->GetInteractor() returns NULL.<br>
><br>
> Apparently I am missing some important step. Can somebody point out how to<br>
> modify the example (below) in order to render the sphere source visible?<br>
><br>
> Thank you<br>
> Peter<br>
><br>
> TestConnection.cxx:<br>
><br>
> #include "vtkInitializationHelper.h"<br>
> #include "vtkProcessModule.h"<br>
> #include "vtkPVOptions.h"<br>
> #include "vtkSMProxyManager.h"<br>
> #include "vtkSMSession.h"<br>
> #include "vtkSMSessionClient.h"<br>
> #include "vtkSMSessionProxyManager.h"<br>
> #include "vtkSMSourceProxy.h"<br>
> #include "vtkSMProperty.h"<br>
> #include "vtkSMRenderViewProxy.h"<br>
><br>
> #include "vtkRenderWindow.h"<br>
> #include "vtkRenderWindowInteractor.h"<br>
><br>
> int main(int argc, char* argv[])<br>
> {<br>
> // Initialization<br>
> vtkPVOptions* options = vtkPVOptions::New();<br>
> vtkInitializationHelper::Initialize(argc, argv,<br>
> vtkProcessModule::PROCESS_CLIENT,<br>
> options);<br>
><br>
> vtkSMSessionClient* session = vtkSMSessionClient::New();<br>
> vtkProcessModule::GetProcessModule()->RegisterSession(session);<br>
> session->Connect(options->GetServerURL());<br>
> cout<<"Connected to: "<<options->GetServerURL()<<endl;<br>
><br>
> vtkSMSessionProxyManager *pxm = session->GetSessionProxyManager();<br>
> vtkSMProxy *sphere = pxm->NewProxy("sources", "SphereSource");<br>
> cout<<"SphereSource created."<<endl;<br>
> vtkSMRenderViewProxy* view=(vtkSMRenderViewProxy*)pxm->NewProxy("views",<br>
> "RenderView");<br>
> cout<<"RenderView created."<<endl;<br>
> vtkSMRepresentationProxy*<br>
> repr=view->CreateDefaultRepresentation(sphere,0);<br>
> cout<<"DefaultRepresentation created."<<endl;<br>
><br>
> //Alternative 1:<br>
> view->StillRender(); while(1); //no crash, but only background visible.<br>
><br>
> //Alternative 2:<br>
> /*<br>
> view->ResetCamera(); //crash here<br>
> view->StillRender(); while(1);<br>
> */<br>
><br>
> //Alternative 3:<br>
> /*<br>
> view->InteractiveRender();<br>
> view->GetInteractor()->Initialize(); //crash here, because<br>
> view->GetInteractor()==NULL<br>
> view->GetInteractor()->Start();<br>
> */<br>
> //TODO: clean up stuff<br>
> }<br>
><br>
> On Wed, Apr 20, 2016 at 5:26 PM, Utkarsh Ayachit<br>
> <<a href="mailto:utkarsh.ayachit@kitware.com">utkarsh.ayachit@kitware.com</a>> wrote:<br>
>><br>
>> > Thank you, but we need a pure C++ solution. There is plenty of<br>
>> > information<br>
>> > how this is done with python scripting, but I can't find anything for<br>
>> > C++.<br>
>> > I really need nothing more than a minimal example.<br>
>><br>
>> Peter, look at TestComparativeAnimationCueProxy.cxx[1] file in the<br>
>> ParaView source. It demonstrates how the initialization needs to<br>
>> happen. If you have further questions on how to use anything specific<br>
>> in this application, feel free to holler :).<br>
>><br>
>> [1]<br>
>> <a href="https://gitlab.kitware.com/paraview/paraview/blob/master/ParaViewCore/ServerManager/Default/Testing/Cxx/TestComparativeAnimationCueProxy.cxx" rel="noreferrer" target="_blank">https://gitlab.kitware.com/paraview/paraview/blob/master/ParaViewCore/ServerManager/Default/Testing/Cxx/TestComparativeAnimationCueProxy.cxx</a><br>
>><br>
>> Utkarsh<br>
><br>
><br>
</div></div></blockquote></div><br></div></div></div></div>