<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","serif";color:#1F497D'>I believe you still need to set the contour value, and it does not show volume. I initially tried it hoping to replace volume rendering, but end up keeping volume rendering.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","serif";color:#1F497D'>Thanks.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","serif";color:#1F497D'>Frank<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","serif"'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri","serif"'> vtkusers-bounces@vtk.org [mailto:vtkusers-bounces@vtk.org] <b>On Behalf Of </b>Joe Ping-Lin Hsiao<br><b>Sent:</b> Thursday, November 14, 2013 11:45 AM<br><b>To:</b> vtkusers@vtk.org<br><b>Subject:</b> [vtkusers] Is rendering from vtkVolumeRayCastIsosurfaceFunction a volume or isosurface?<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hi,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I want to implement a program which allows users to drag a slide bar to change isovalue and see a preview of what the actual surface would look like. Once they are satisfied with a preview, they would click another button to actually create the surface using the current isovalue.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I found vtkVolumeRayCastIsosurfaceFunction and its example looks very promising. See the image attached. I am just wondering is the rendering in the image still a volume? The source code uses vtkVolume and set is ray cast function as an vtkVolumeRayCastIsosurfaceFunction, and doesn't call vtkContour at all.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks,<o:p></o:p></p></div><div><p class=MsoNormal>Joe<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>