<br><br><div class="gmail_quote">On Sat, Jan 29, 2011 at 12:18 AM, Robbie Banks <span dir="ltr"><<a href="mailto:robbie.banks@gmail.com">robbie.banks@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Can anyone see where this is going wrong?</span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">I have a scene where the even numbered actors are reflections of the data for the odd actors.</span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">I am trying to create a single vtkPolyData set with the ploydata for the whole scene. The reflections are created with a vtkReflectionFilter, which creates a vtkDataSet.</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);">I am trying to cast this vtkDataSet down and then convert it to vtkPolyData to be appended.</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);">The compiler is throwing an error when I try and create the vtkDataSetToPolyDataFilter saying:</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Error: invalid conversion from ‘vtkAlgorithm’ to ‘vtkDataSetToPolyDataFilter.</span></p><p class="MsoNormal">
<span style="color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);">I guess it doesn’t like being created with a vtkSmartPointer, but I don’t know how to fix it.</span></p></div>
</div></blockquote><div><br>Its because vtkDataSetToPolyDataFilter is an abstract base class. It cannot be instantiated by vtkSmartPointer's New.<span style="font-size: 10pt; font-family: "Courier New";"></span><br>
<br> <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Thoughts?</span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Robbie</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Code below:</span></p><p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> </span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";">vtkSmartPointer<vtkAppendPolyData> pAppendData = vtkSmartPointer<vtkAppendPolyData>::New();</span></p><p class="MsoNormal" style="">
<span style="font-size: 10pt; font-family: "Courier New";">int reflectedActor = 0;</span></p><p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";">for(int i = 0; i < actors.size(); i++){</span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> vtkSmartPointer<vtkActor> actor = actors[i];</span></p><p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> if(actor->IsA("vtkActor")){</span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> vtkSmartPointer<vtkPolyData> pPolyData = vtkSmartPointer<vtkPolyData>::New();</span></p><p class="MsoNormal" style="">
<span style="font-size: 10pt; font-family: "Courier New";"> if(i==reflectedActor){</span></p><p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> vtkSmartPointer<vtkDataSet> pDataSet = vtkDataSet::SafeDownCast(actor->GetMapper()->GetInput());</span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> vtkSmartPointer<vtkDataSetToPolyDataFilter> pFilter = vtkSmartPointer<vtkDataSetToPolyDataFilter>::New();</span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> pFilter->SetInput(pDataSet2);</span></p><p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> pFilter->Update();</span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> pPolyData = pFilter->GetOutput();</span></p><p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> reflectedActor+=2;</span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> }</span></p><p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> else</span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> pPolyData = vtkPolyData::SafeDownCast(actor->GetMapper()->GetInput());</span></p><p class="MsoNormal" style="">
<span style="font-size: 10pt; font-family: "Courier New";"> pAppendData->AddInput(pPolyData);</span></p><p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: "Courier New";"> }</span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family: "Courier New";">}</span><span style="color: rgb(31, 73, 125);"></span></p></div></div><br>_______________________________________________<br>
Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
<br>
Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
<br>
Follow this link to subscribe/unsubscribe:<br>
<a href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
<br></blockquote></div><br>