<br><br>On Tuesday, May 20, 2014, Ahmet Doğan <<a href="mailto:isimtic@gmail.com">isimtic@gmail.com</a>> 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>frustum behaves like box clip doesn't
      it?</div><div></div></div></blockquote><div><br></div><div>There are differences, but yes very similar.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"><div> I just need to extract cells by user view or like xy xz yz
      axis. like taking picture I don't need behind of dataset how can
      it be done? not possible with vtk?  </div></div></blockquote><div><br></div><div>I'ld love to be proven wrong but I don't think so, not in all cases. It boils down to occlusion culling.</div><div><br></div>
Zooming lessens the pixel resolution problem in scan conversion or ray casting, but isn't perfect.<div><br><div>Extract surface into normal generation into frustum dotted with view vector and cull the non negative results is close but it will get some corner cases wrong too. It isn't resolution dependent at least.</div>
<div><br></div><div>I'ld like to hear about any other solutions out there since the question comes up every once in a while.</div><div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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      On 21.05.2014 03:54, David E DeMarle wrote:<span class="Apple-style-span" style> </span></div></div></blockquote><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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    <blockquote type="cite">Not much. It is a limitation of the screen space
      algorithm whch can pick at most one cell per pixel.
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      <div>Frustum selection is an object space algorithm and doesn't
        have the same limitation, but it can not cull occluded cells.<br>
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            On Tuesday, May 20, 2014, Ahmet Doğan <<a href="javascript:_e(%7B%7D,'cvml','isimtic@gmail.com');" target="_blank">isimtic@gmail.com</a>>
            wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <br>
              On 21.05.2014 03:21, Ahmet Doğan wrote:<br>
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                On 21.05.2014 03:12, Ahmet Doğan wrote:<br>
                <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                  with vtkHardwareSelector cells are changing on zooming
                  How can I disable it.<br>
                  <br>
                  Please check the image I added<br>
                  <br>
                  thank you<br>
                  <br>
                  <br>
                  On 20.05.2014 21:18, Bill Lorensen wrote:<br>
                  <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                    It has been replaced by vtkHardwareSelector<br>
                    <br>
                    <br>
                    On Tue, May 20, 2014 at 2:01 PM, Ahmet Doğan <<a>isimtic@gmail.com</a>>
                    wrote:<br>
                    <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                      hi,<br>
                      <br>
                      What's happened vtkVisibleCellSelector in vtk 6
                      and up. I cant see any<br>
                      information on migrate page<br>
                      <br>
                      Kind regards.<br>
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      -- <br>
      David E DeMarle<br>
      Kitware, Inc.<br>
      R&D Engineer<br>
      21 Corporate Drive<br>
      Clifton Park, NY 12065-8662<br>
      Phone: 518-881-4909<br>
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</blockquote></div><br><br>-- <br>David E DeMarle<br>Kitware, Inc.<br>R&D Engineer<br>21 Corporate Drive<br>Clifton Park, NY 12065-8662<br>Phone: 518-881-4909<br>