I believe you may also want to set layers if you want to create overlaid viewports that have no background (like a 3d axis rendered in a separate rederer within a renderwindow).<br><br>virtual void <a class="el" href="http://www.vtk.org/doc/release/5.2/html/a01192.html#270c62e248c8a479ec61b839e3a4c4d8">SetNumberOfLayers</a> (int)<br>
virtual void <a class="el" href="http://www.vtk.org/doc/release/5.2/html/a01187.html#5621b2f66530f887d930ac21860f963e">SetLayer</a> (int)<br><br>Here's an example, it doesn't use layers, but that would just be a couple of extra lines of code:<br>
<a href="http://public.kitware.com/pipermail/vtkusers/2001-September/007992.html">http://public.kitware.com/pipermail/vtkusers/2001-September/007992.html</a><br><br><br><br><div class="gmail_quote">On Thu, Jan 7, 2010 at 1:15 PM, David E DeMarle <span dir="ltr"><<a href="mailto:dave.demarle@kitware.com">dave.demarle@kitware.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Yes you can. A RenderWindow can have any number of Renderers in it,<br>
and those may freely overlap. When they overlap the bottom one sets<br>
the background color for instance. For interaction there is a way to<br>
query/control what renderer gets the action.<br>
<font color="#888888"><br>
David E DeMarle<br>
Kitware, Inc.<br>
R&D Engineer<br>
28 Corporate Drive<br>
Clifton Park, NY 12065-8662<br>
Phone: 518-371-3971 x109<br>
</font><div><div></div><div class="h5"><br>
<br>
<br>
On Thu, Jan 7, 2010 at 1:00 PM, Xiaofeng Z <<a href="mailto:xf10036@hotmail.com">xf10036@hotmail.com</a>> wrote:<br>
> Hello,<br>
><br>
> I would like to know if VTK will be able to handle two or more viewports<br>
> that overlap on each other. If so, how does it behave?<br>
><br>
> Xiaofeng Zhao<br>
><br>
><br>
><br>
><br>
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