<html>
  <head>
    <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <div class="moz-cite-prefix">Sure, I will send you some datasets
      after this email. <br>
      <br>
      We have a very interesting project here at McMaster University to
      visualize x-ray diffraction data. The visualization package is
      written in C++ using VTK as rendering engine and Qt as GUI
      builder. You can find some screenshots together with description
      of the software at
      <a class="moz-txt-link-freetext" href="http://www.chemistry.mcmaster.ca/facilities/xray/221-max3d">http://www.chemistry.mcmaster.ca/facilities/xray/221-max3d</a>. <br>
      <br>
      Best,<br>
      Weiguang<br>
      <br>
      <br>
      On 29/10/2015 1:12 PM, Aashish Chaudhary wrote:<br>
    </div>
    <blockquote
cite="mid:CAEw35Z-RUT3iT9K4QGPnudqMheBwoFdbmjKMcRNJYLAg3TZw8Q@mail.gmail.com"
      type="cite">
      <div dir="ltr">
        <div class="gmail_extra">
          <div class="gmail_quote">On Thu, Oct 29, 2015 at 1:07 PM,
            Weiguang guan <span dir="ltr"><<a moz-do-not-send="true"
                href="mailto:guanw@rhpcs.mcmaster.ca" target="_blank">guanw@rhpcs.mcmaster.ca</a>></span>
            wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div text="#000000" bgcolor="#FFFFFF">
                <div>Thanks, Aashish, for confirming it and providing a
                  workaround. Hope my post + other related posts would
                  bump it up a bit in the priority list. <br>
                </div>
              </div>
            </blockquote>
            <div><br>
            </div>
            <div>I am sure it will. Can you send me some sample dataset
              so that I can play around? Working with real use-cases is
              always more fun than using the wavelet or other sample
              data we have. Also, if you can share some screen captures,
              that would be great (if possible). You can send me an
              email privately for those if that's more comfortable. We
              always like to hear back from the community. </div>
            <div><br>
            </div>
            <div>Thanks,</div>
            <div>- Aashish</div>
            <div> </div>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div text="#000000" bgcolor="#FFFFFF">
                <div> <br>
                  Best,<br>
                  Weiguang
                  <div>
                    <div class="h5"><br>
                      <br>
                      On 29/10/2015 12:14 PM, Aashish Chaudhary wrote:<br>
                    </div>
                  </div>
                </div>
                <div>
                  <div class="h5">
                    <blockquote type="cite">
                      <div dir="ltr"><span style="font-size:16px">Hi
                          Weiguang, </span><br>
                        <div><span style="font-size:16px"><br>
                          </span></div>
                        <div><span style="font-size:16px">Yes, a
                            true multi volume rendering is not supported
                            in current GPU mappers. This is a
                            interesting task and we talked about
                            implementing it but didn't hit high in our
                            priority list. I think there could be some
                            interesting questions / answer related to
                            this on blending and mixing. </span><span
                            style="font-size:16px">One thing you could
                            do (if possible) is that you can combine two
                            volumes into one with two components
                            (assuming that each has one) if you need
                            something soon. Also, I believe the </span><span
                            style="font-size:16px">texture mapping
                            mapper works because it crates these
                            polygonal slices but I would imaging that
                            even it would not do the right thing
                            completely (it may look right though) in all
                            circumstances since its not going to sort
                            slices between two volumes. </span></div>
                        <div><span style="font-size:16px"><br>
                          </span></div>
                        <div><span style="font-size:16px">- Aashish </span></div>
                      </div>
                      <div class="gmail_extra"><br>
                        <div class="gmail_quote">On Thu, Oct 29, 2015 at
                          11:59 AM, Weiguang guan <span dir="ltr"><<a
                              moz-do-not-send="true"
                              href="mailto:guanw@rhpcs.mcmaster.ca"
                              target="_blank">guanw@rhpcs.mcmaster.ca</a>></span>
                          wrote:<br>
                          <blockquote class="gmail_quote"
                            style="margin:0 0 0 .8ex;border-left:1px
                            #ccc solid;padding-left:1ex">There were a
                            few posts in the past about this topic. The
                            conclusion seemed to be that VTK didn't
                            support multi-volume rendering in terms of
                            proper visibility sorting/blending. I'm not
                            sure it is still true.<br>
                            <br>
                            I've done a test where two partially
                            overlapped volumes are used. I've found that
                            only the texture mapping mapper can render
                            them correctly. All the other mappers (GPU
                            based or ray casting) always have one volume
                            occlude the other one no matter what
                            direction the camera is viewing.<br>
                            <br>
                            Is vtkImageOcclusionSpectrum designed for
                            handling multiple volume rendering? Any
                            comments will be appreciated. Thanks.<br>
                            <br>
                            Best,<br>
                            Weiguang<br>
_______________________________________________<br>
                            Powered by <a moz-do-not-send="true"
                              href="http://www.kitware.com"
                              rel="noreferrer" target="_blank">www.kitware.com</a><br>
                            <br>
                            Visit other Kitware open-source projects at
                            <a moz-do-not-send="true"
                              href="http://www.kitware.com/opensource/opensource.html"
                              rel="noreferrer" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
                            <br>
                            Please keep messages on-topic and check the
                            VTK FAQ at: <a moz-do-not-send="true"
                              href="http://www.vtk.org/Wiki/VTK_FAQ"
                              rel="noreferrer" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
                            <br>
                            Search the list archives at: <a
                              moz-do-not-send="true"
                              href="http://markmail.org/search/?q=vtkusers"
                              rel="noreferrer" target="_blank">http://markmail.org/search/?q=vtkusers</a><br>
                            <br>
                            Follow this link to subscribe/unsubscribe:<br>
                            <a moz-do-not-send="true"
                              href="http://public.kitware.com/mailman/listinfo/vtkusers"
                              rel="noreferrer" target="_blank">http://public.kitware.com/mailman/listinfo/vtkusers</a><br>
                          </blockquote>
                        </div>
                        <br>
                        <br clear="all">
                        <div><br>
                        </div>
                        -- <br>
                        <div>
                          <div dir="ltr"><font face="trebuchet ms,
                              sans-serif"><i>| Aashish Chaudhary <br>
                                | Technical Leader         <br>
                                | Kitware Inc.            <br>
                              </i></font>
                            <div><i><font face="trebuchet ms,
                                  sans-serif">| </font><a
                                  moz-do-not-send="true"
                                  href="http://www.kitware.com/company/team/chaudhary.html"
                                  target="_blank">http://www.kitware.com/company/team/chaudhary.html</a></i></div>
                          </div>
                        </div>
                      </div>
                    </blockquote>
                    <br>
                  </div>
                </div>
              </div>
            </blockquote>
          </div>
          <br>
          <br clear="all">
          <div><br>
          </div>
          -- <br>
          <div class="gmail_signature">
            <div dir="ltr"><font face="trebuchet ms, sans-serif"><i>|
                  Aashish Chaudhary <br>
                  | Technical Leader         <br>
                  | Kitware Inc.            <br>
                </i></font>
              <div><i><font face="trebuchet ms, sans-serif">| </font><a
                    moz-do-not-send="true"
                    href="http://www.kitware.com/company/team/chaudhary.html"
                    target="_blank">http://www.kitware.com/company/team/chaudhary.html</a></i></div>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>