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<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; -webkit-text-decorations-in-effect: none; text-indent: 0px; -webkit-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; " class="">Cheers,</p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; " class=""><br class=""></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; " class="">Allen</p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; " class=""><br class=""></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; " class=""><br class=""></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; " class=""><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; " class="">Allen Sanderson</font></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; " class=""><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; " class="">SCI Institute</font></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; " class=""><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; " class="">University of Utah</font></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; " class=""><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; " class=""><a href="http://www.sci.utah.edu" class="">www.sci.utah.edu</a></font></p><br class="Apple-interchange-newline"></span></span><br class="Apple-interchange-newline"></span></span>
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<br class=""><div>Hello,</div><div><br class=""></div><div>A followup question with the vtkTubeFilter and vtkRibbonFilter. If the input vtkPolyData contains objects other than lines the filter strips those objects out only return the tubes or ribbons. Is there a way to prevent this from happening? Or does one need to handle that themselves? </div><div><br class=""></div><div><br class=""><blockquote type="cite" class=""><div class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""><span class="Apple-style-span" style="border-collapse: separate; line-height: normal; border-spacing: 0px;"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><br class="Apple-interchange-newline"></span></span>
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<br class=""><div class=""><blockquote type="cite" class=""><div class="">On Feb 16, 2016, at 3:44 PM, Cory Quammen <<a href="mailto:cory.quammen@kitware.com" class="">cory.quammen@kitware.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Allen,<br class=""><br class="">I don't know of a way to set the line width based on a variable in<br class="">stock VTK. Maybe you could do something with a custom geometry shader,<br class="">which you can set in the OpenGL2 backend version of<br class="">vtkOpenGLPolyDataMapper via SetGeometryShaderCode(const char*).<br class=""><br class="">Another approach could be using vtkTubeFilter to automatically set the<br class="">radius of the cylinders. The input to this filter should be a set of<br class="">line segments with point data with your variable for each line defined<br class="">at each endpoint of the line.<br class=""><br class="">HTH,<br class="">Cory<br class=""><br class="">On Tue, Feb 16, 2016 at 5:32 PM, Allen Sanderson <<a href="mailto:allen@sci.utah.edu" class="">allen@sci.utah.edu</a>> wrote:<br class=""><blockquote type="cite" class="">Thanks David, we thought that was the case.<br class=""><br class="">Let me ask a somewhat parallel question. When rendering lines one typically<br class="">sets a line width and sends the geometry downstream. The lines will be<br class="">colored base on a variable but the line width is constant. At the same time<br class="">when doing point glyphs we set the color and size based on a variable. If we<br class="">wanted to vary the line width using a variable is our only choice to use a<br class="">cylinder?<br class=""><br class="">Cheers,<br class=""><br class=""><br class="">Allen<br class=""><br class=""><br class=""><br class="">Allen Sanderson<br class=""><br class="">SCI Institute<br class=""><br class="">University of Utah<br class=""><br class=""><a href="http://www.sci.utah.edu/" class="">www.sci.utah.edu</a><br class=""><br class=""><br class=""><br class=""><br class="">On Feb 16, 2016, at 12:20 PM, David Gobbi <<a href="mailto:david.gobbi@gmail.com" class="">david.gobbi@gmail.com</a>> wrote:<br class=""><br class="">Hi Allen,<br class=""><br class="">You are correct, vtkLookupTable does not provide a way of doing this.<br class=""><br class="">I'm not sure what work-arounds there are for geometry, but for images<br class="">you can map the RGB and A separately, and then combine them into<br class="">RGBA with vtkImageAppendComponents.<br class=""><br class=""> - David<br class=""><br class=""><br class="">On Tue, Feb 16, 2016 at 11:48 AM, Allen Sanderson <<a href="mailto:allen@sci.utah.edu" class="">allen@sci.utah.edu</a>><br class="">wrote:<br class=""><blockquote type="cite" class=""><br class="">Hello,<br class=""><br class="">We are trying to render geometry using a lookup table for the RGB value<br class="">using one scalar variable, but we want to use a secondary scalar variable<br class="">for determining the opacity. Something like the following:<br class=""><br class="">RGB -> variable one<br class="">A -> variable two<br class=""><br class="">In looking through the VTK 6 documentation on mappers we have not found<br class="">anything that leads us to believe this functionality is possible. But we<br class="">have done an exhaustive search.<br class=""><br class="">If it is possible we would greatly appreciate pointers. Thanks.<br class=""><br class=""><br class=""><br class="">Cheers,<br class=""><br class="">Allen<br class=""><br class=""><br class="">Allen Sanderson<br class="">SCI Institute<br class="">University of Utah<br class=""><a href="http://www.sci.utah.edu" class="">www.sci.utah.edu</a><br class=""></blockquote><br class=""><br class="">_______________________________________________<br class="">Powered by <a href="http://www.kitware.com" class="">www.kitware.com</a><br class=""><br class="">Visit other Kitware open-source projects at<br class=""><a href="http://www.kitware.com/opensource/opensource.html" class="">http://www.kitware.com/opensource/opensource.html</a><br class=""><br class="">Please keep messages on-topic and check the VTK FAQ at:<br class="">http://www.vtk.org/Wiki/VTK_FAQ<br class=""><br class="">Search the list archives at: http://markmail.org/search/?q=vtkusers<br class=""><br class="">Follow this link to subscribe/unsubscribe:<br class="">http://public.kitware.com/mailman/listinfo/vtkusers<br class=""><br class=""><br class=""><br class="">_______________________________________________<br class="">Powered by www.kitware.com<br class=""><br class="">Visit other Kitware open-source projects at<br class="">http://www.kitware.com/opensource/opensource.html<br class=""><br class="">Please keep messages on-topic and check the VTK FAQ at:<br class="">http://www.vtk.org/Wiki/VTK_FAQ<br class=""><br class="">Search the list archives at: http://markmail.org/search/?q=vtkusers<br class=""><br class="">Follow this link to subscribe/unsubscribe:<br class="">http://public.kitware.com/mailman/listinfo/vtkusers<br class=""><br class=""></blockquote><br class=""><br class=""><br class="">-- <br class="">Cory Quammen<br class="">R&D Engineer<br class="">Kitware, Inc.<br class=""></div></div></blockquote></div><br class=""></div>_______________________________________________<br class="">Powered by <a href="http://www.kitware.com" class="">www.kitware.com</a><br class=""><br class="">Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" class="">http://www.kitware.com/opensource/opensource.html</a><br class=""><br class="">Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" class="">http://www.vtk.org/Wiki/VTK_FAQ</a><br class=""><br class="">Search the list archives at: <a href="http://markmail.org/search/?q=vtkusers" class="">http://markmail.org/search/?q=vtkusers</a><br class=""><br class="">Follow this link to subscribe/unsubscribe:<br class=""><a href="http://public.kitware.com/mailman/listinfo/vtkusers" class="">http://public.kitware.com/mailman/listinfo/vtkusers</a><br class=""></div></blockquote></div><br class=""></body></html>