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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Where are you using the lookup table? Can you use vtkColorTransferFunction or vtkDiscretizableColorTransferFunction instead? There you would be able to specify ranges.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Note that GetColor(…) and MapValue(…) are not declared virtual in the vtkLookupTable class so cannot be overridden.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=NL style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Kind regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=NL style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Deric Stone<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> vtkusers-bounces@vtk.org [mailto:vtkusers-bounces@vtk.org] <b>On Behalf Of </b>Frédéric Speisser<br><b>Sent:</b> Monday, December 03, 2012 6:20 PM<br><b>To:</b> Johannes Strecha<br><b>Cc:</b> vtkusers@vtk.org<br><b>Subject:</b> Re: [vtkusers] color mapping<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Thank you Johannes for your answer,<br><br>Yes, I know this algorithm, I also use it to filter data.<br>But here my aim is not to filter data out-of-range but to keep these data visible but set in a custom color.<br><br>Kind regards,<br>Frédéric<br><br>Le 03/12/2012 18:12, Johannes Strecha a écrit :<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Hello,<br><br>I can't give you a direct answer, but I think what you want can be done with the vtkClipDataSet filter (5.8). See the reference for details. I assume that adjusting the lookup table would work faster, though.<br><br>When trying to realize a "filled contour plot" by adjusting the lookup table (to a series of steps) I experienced that some interpolation was performed nonetheless and I ended up with blurred filled contours. Maybe this would also happen in your case.<br><br>Kind regards,<br>Johannes Strecha.<o:p></o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Mon, Dec 3, 2012 at 5:31 PM, Frédéric Speisser <<a href="mailto:speisser@kappaeng.com" target="_blank">speisser@kappaeng.com</a>> wrote:<o:p></o:p></p><div><p class=MsoNormal>Hi all,<br><br><br>I'm using <i>vtkLookupTable::SetTableRange</i> to remap colors of a LUT to a custom range of a given scalar values. <br><br>This works great but per default and as explained in API documentation :<br><i>Scalar values less than minimum range value are clamped to minimum range value. Scalar values greater than maximum range value are clamped to maximum range value.<br></i>So values out of range are displayed in minimum range value color (for those under custom range) and in maximum range value color (for those over custom range).<br>I would like to display out-of-range values in a custom color, so that for example all values under and over custom range are displayed in black.<br>I began to write a class <i>MyVtkLookupTable</i> which inherits from <i>vtkLookupTable </i>and i tried to override <i>GetColor(double v, double rgb[3])</i> and <i>MapValue(double v)</i> to be able to override color displayed but it seems not to work.<br>Is it possible to do that by overriding vtk classes ? If yes, which method/classes should I override ?<br><br>Any clues are wellcome, thank you,<br><br><br><br>Frédéric <o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><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><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></blockquote><p class=MsoNormal><o:p> </o:p></p></div></body></html>