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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I’m working on a set of C++ plug-ins to visualize weather data. I’m having a problem applying a LUT to a contour surface of relative humidity.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Here’s my description of what I’m doing. If any of this is inaccurate, I would appreciate corrections. I still have a good deal to learn about how ParaView works.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>On the client side (VTK filter algorithm) I’m building a contour surface of the scalar variable relative humidity through a 3D structured grid, and the XML name is “CloudSurface”. Then using a sample by Sebastien on the server side I catch the signal onSourceAdded.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>My intent is to modify the LUT that PV creates for the representation rather than creating a new LUT. My problem is that the modified PV LUT isn’t in force on the first application of the filter, but the LUT is correct on subsequent applications of the filter to the same data set. Any help someone can provide to have this LUT in effect from the first application would be great.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m working on Windows 7 with Visual Studio 2008, and I’m using ParaView 3.10.1. I haven’t been able to move to a later version of PV because of a problem with the glyph filter that works on 32-bit PV 3.10.1 but has memory problems on later versions of PV (Mantis ID <span style='color:black'>0013697</span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>) </span>. I plan to revisit that situation with version 4.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Below is the code.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks!<o:p></o:p></p><p class=MsoNormal>Phil<o:p></o:p></p><p class=MsoNormal>============================================================================================================<o:p></o:p></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> success = QObject::connect(pqApplicationCore::instance()->getServerManagerModel(),<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>SIGNAL</span>(sourceAdded(pqPipelineSource*)),<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>this</span>, <span style='color:blue'>SLOT</span>(onSourceAdded(pqPipelineSource*)));<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>when the CloudSurface filter is applied a representation is created and I process that with<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>else</span> <span style='color:blue'>if</span> ( strcmp( XMLName, <span style='color:#A31515'>"CloudSurface"</span> ) == 0 )<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> pqDR0 = p0->getRepresentation( activeView );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>if</span> ( pqDR0 == pipelineRep )<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> vtkSMProxy *pqProxy = pipelineRep->getProxy();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> pipelineRep->colorByArray( <span style='color:#A31515'>"Height"</span>, 0 ); <span style='color:green'>// 0: POINT_DATA / 1:CELL_DATA<o:p></o:p></span></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:green'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> vtkSMProxy *pq0Proxy = pipelineRep->getProxy();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> intProp = vtkSMIntVectorProperty::SafeDownCast( pq0Proxy->GetProperty( <span style='color:#A31515'>"MapScalars"</span> ) );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>if</span> ( intProp )<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> success = intProp->SetElements1( 1 ); <o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:green'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> pqScalarsToColors *existingLUT = pqDR0->getLookupTable();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> setUpCloudLUT( existingLUT );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> vtkSMDoubleVectorProperty *opProp;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:green'>// setting opacity of surface to 0.9<o:p></o:p></span></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>if</span> ( pq0Proxy )<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> opProp = vtkSMDoubleVectorProperty::SafeDownCast( pq0Proxy->GetProperty( <span style='color:#A31515'>"Opacity"</span> ) );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>if</span> ( opProp )<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> success = opProp->SetElements1( 0.9 );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> smRep->UpdateVTKObjects();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>And the cloud lookup table is set up with<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:blue'>void</span><span style='font-size:10.0pt;font-family:"Courier New"'> pqSurfaceRepresentationBehavior::setUpCloudLUT( pqScalarsToColors *existingLUT )<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>{<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> vtkSMDoubleVectorProperty* dvp = vtkSMDoubleVectorProperty::SafeDownCast(<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> existingLUT->getProxy()->GetProperty( <span style='color:#A31515'>"RGBPoints"</span> ) );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> QList<QVariant> ctlPts;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>int</span> numElementsPerCommand = dvp->GetNumberOfElementsPerCommand();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:green'>// now load the new set of RGB points for this color table<o:p></o:p></span></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:green'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> ctlPts << -0.380754 << 0.392157 << 0.392157 << 0.392157;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> ctlPts << 2.50049 << 0.92549 << 0.945098 << 0.909804;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> ctlPts << 8.49218 << 1. << 1. << 1.;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> pqSMAdaptor::setMultipleElementProperty( dvp, ctlPts );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:green'>// set the NaN value<o:p></o:p></span></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> vtkSMDoubleVectorProperty* nan = vtkSMDoubleVectorProperty::SafeDownCast(<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> existingLUT->getProxy()->GetProperty( <span style='color:#A31515'>"NanColor"</span> ) );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>if</span> ( nan )<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> nan->SetElements3( 0.254002, 0., 0. );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:green'>// set the ColorSpace<o:p></o:p></span></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> vtkSMIntVectorProperty *cSpace = vtkSMIntVectorProperty::SafeDownCast(<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> existingLUT->getProxy()->GetProperty( <span style='color:#A31515'>"ColorSpace"</span> ) );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>if</span> ( cSpace )<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> cSpace->SetElements1( 3 ); <span style='color:green'>// 0 - RGB 1 - HSV 2 - LAB 3 - Diverging<o:p></o:p></span></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>}<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>