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    <p>Dear Luca</p>
    <p>My problem was not related to the cut endpoints, but on some
      extra part that was not related to the polyline provided. I do not
      know if the problems can be related, but I can not exclude it.<br>
    </p>
    <p>you can read my first messages here:</p>
    <p><a class="moz-txt-link-freetext" href="http://public.kitware.com/pipermail/vtkusers/2017-April/098302.html">http://public.kitware.com/pipermail/vtkusers/2017-April/098302.html</a></p>
    <p>This is the sample image I provided</p>
    <p><a class="moz-txt-link-freetext" href="http://public.kitware.com/pipermail/vtkusers/attachments/20170405/c72a409b/attachment.png">http://public.kitware.com/pipermail/vtkusers/attachments/20170405/c72a409b/attachment.png</a></p>
    <p>And this is a short sample code I provided asking for help</p>
    <p><a class="moz-txt-link-freetext" href="http://public.kitware.com/pipermail/vtkusers/2017-April/098304.html">http://public.kitware.com/pipermail/vtkusers/2017-April/098304.html</a></p>
    <p><br>
    </p>
    <p>Regards</p>
    <p>Matteo<br>
    </p>
    <br>
    <div class="moz-cite-prefix">Il 23/06/2017 15:30, Luca Pallozzi
      Lavorante ha scritto:<br>
    </div>
    <blockquote
cite="mid:CAFuWFrKe_+xdADqT7YQExKJHyTdM99wzzk7foH9Fb4gCmvCuyw@mail.gmail.com"
      type="cite">
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          <div>
            <div>Hi vtkusers,<br>
              <br>
            </div>
            regarding my previous posting, describing the "waving"
            behavior of the plane generated via vtkPolyPlane, I am
            attaching an image showing this issue. Here I am using the
            following pipelyne : vtkPolyLine -> vtkPolyPlane ->
            vtkCutter. The polyline is composed by three points and
            vtkCutter is cutting through a vtkPolyData Surface. It is
            possible to see the waving behavior in the resulting cut,
            just beyond the polyline's endpoints.<br>
            <br>
          </div>
           Thank you for any help.<br>
          <br>
        </div>
                   Luca<br>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Fri, Jun 23, 2017 at 10:12 AM, Luca
          Pallozzi Lavorante <span dir="ltr"><<a
              moz-do-not-send="true" href="mailto:lplavorante@gmail.com"
              target="_blank">lplavorante@gmail.com</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
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                    <div>
                      <div>Hi Marco, did you experience the same problem
                        that I reported?<br>
                      </div>
                       I mean, the cuts extending beyond the endpoints
                      of the polyline used to feed vtkPolyPlane?<br>
                      <br>
                    </div>
                    I think that maybe the problem could be solved
                    composing vtkPolyPlane with two more planes normal
                    to each polylne's endpoints. I also think that this
                    could be done using something like
                    vtkImplicitBoolean, but I don't know how. It is not
                    clear to me how instances of vtkImplicitFunction
                    should be composed in order to remove the planes
                    past the polyline's endpoints. I also noticed that
                    this "extensions" are not planar: beyond the
                    polyline's endpoints the planes form "waves" when
                    looked down along the Z axis. I also noticed this
                    behaviour by modifying the
                    Interaction/Widgets/Testing/<wbr>Cxx/TestPolyPlane.cxx
                    example, where I explicitly created and visualized a
                    vtkPolyData from vtkCutter's output (In this
                    example, vtkCutter received as implicit function an
                    instance of vtkPolyPlane, just as I needed). <br>
                    <br>
                  </div>
                   Any kind help or explanation on this issue would be
                  greatly welcomed.<br>
                  <br>
                </div>
                     Thank you<span class="HOEnZb"><font color="#888888"><br>
                    <br>
                  </font></span></div>
              <span class="HOEnZb"><font color="#888888">         Luca<br>
                </font></span></div>
            <div class="HOEnZb">
              <div class="h5">
                <div class="gmail_extra"><br>
                  <div class="gmail_quote">On Thu, Jun 22, 2017 at 6:12
                    PM, Luca Pallozzi Lavorante <span dir="ltr"><<a
                        moz-do-not-send="true"
                        href="mailto:lplavorante@gmail.com"
                        target="_blank">lplavorante@gmail.com</a>></span>
                    wrote:<br>
                    <blockquote class="gmail_quote" style="margin:0 0 0
                      .8ex;border-left:1px #ccc solid;padding-left:1ex">
                      <div dir="ltr">
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                            <div>
                              <div>
                                <div>Hi vtkusers,<br>
                                  <br>
                                </div>
                                I have a vtkUnstruturedGrid showing
                                depositional data and I'd like to cut
                                this data using contiguous vertical
                                slices defined by a vtkPolyLine. I have
                                seen in the documentation that
                                vtkPolyPlane generates the right
                                implicit function which I can pass to
                                vtkCutter.<br>
                              </div>
                              The resulting cuts are OK, but my vertical
                              slices extends beyond my polyline's
                              endpoints. I would like to end the cutting
                              planes exaclty at my polyline's first and
                              last point. Is this possible?<br>
                            </div>
                            I am using VTK 7.0 on Linux.<br>
                            <br>
                          </div>
                            Thank you very much for any help<span
                            class="m_5975167852926655791HOEnZb"><font
                              color="#888888"><br>
                              <br>
                            </font></span></div>
                        <span class="m_5975167852926655791HOEnZb"><font
                            color="#888888">                Luca <br>
                          </font></span></div>
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