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<p class="MsoNormal">Can anyone help me with vtkWarpLens?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What I am trying to do is implement a distortion pattern on the camera to modify how the data is seen.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is the meat of the code (it’s in C#, I’m using Activis)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> vtkPolyData pd = vtkPolyData.New();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> CreateFromFile(pd); // this creates a triangle representation of a height field<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> double [] sr = pd.GetScalarRange();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> vtkLookupTable lut = vtkLookupTable.New();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> lut.SetNumberOfColors(16);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> lut.SetHueRange(0.667, 0.0);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> lut.Build();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> wl = vtkWarpLens.New();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> wl.SetInputConnection(pd.GetProducerPort());<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> wl.SetPrincipalPoint(0.5, 0.5);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> wl.SetFormatWidth(1);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> wl.SetFormatHeight(1);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> wl.SetImageWidth(1000);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> wl.SetImageHeight(1000);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> wl.SetK1(0.01307);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> wl.SetK2(0.0003102);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> wl.SetP1(1.953e-005);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> wl.SetP2(-9.655e-005);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red">
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> vtkDataSetMapper dsmDistorted = vtkDataSetMapper.New();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> dsmDistorted.SetInputConnection(wl.GetOutputPort());<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> dsmDistorted.SetLookupTable(lut);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> dsmDistorted.SetScalarRange(sr[0]+20, sr[1]);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> vtkActor dsDistortedActor = vtkActor.New();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> dsDistortedActor.SetMapper(dsmDistorted);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> m_renDistorted.AddActor(dsDistortedActor);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> m_renWin.SetDesiredUpdateRate(0);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> m_renWin.Render();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"> m_renDistorted.ResetCamera();<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Lucida Console";color:red"><o:p> </o:p></span></p>
<p class="MsoNormal">So, basically, I am creating a terrain representation using polygons, passing it through the warplens, passing that through a dataset mapper to give it pretty colors, then displaying it.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The issue is that the “warp” appears to be static to the terrain, not to the camera. I’m pretty new to VTK, so it’s possible that I don’t understand how the Interactor and the Camera are related.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Can someone help?<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">David<span style="font-family:"Lucida Console";color:red"><o:p></o:p></span></p>
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