Thanks for all the advices I got it working.<div><br></div><div>-> there is a qvtk_qtopengl option in vtk and you have to be careful when you setup your qvtkwidget!</div><div><br></div><div>Nicolas<br><div><br><div class="gmail_quote">
On Fri, Jan 27, 2012 at 11:20 AM, Nicolas Rannou <span dir="ltr"><<a href="mailto:nicolas.lists@gmail.com">nicolas.lists@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I'm using a QVTKWidget to render my scene and it seems to be the problem.<div>(a simple example works properly but my application does not)</div><div><div><br><div>Can I somehow turn opengl on in this QVTKWidget, should I customize QVTKWidget to inherit from a QGLWidget, etc.?</div>
<div>Is there any option in vkt's cmake to allow such a thing?</div><div><br></div><div>Thanks<div><div class="h5"><br><br><div class="gmail_quote">On Thu, Jan 26, 2012 at 4:11 PM, Nicolas Rannou <span dir="ltr"><<a href="mailto:nicolas.lists@gmail.com" target="_blank">nicolas.lists@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Thanks for the suggestions I'm giving it a try!<div><br><div>I'll use depth peeling since I need the objects to remain distincts and it looks more straight forward.</div>
<div>It looks like I should also set "renderWindow->SetAlphaBitPlanes(1)"<div><div><br>
<br><div class="gmail_quote">On Thu, Jan 26, 2012 at 3:18 PM, David E DeMarle <span dir="ltr"><<a href="mailto:dave.demarle@kitware.com" target="_blank">dave.demarle@kitware.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
And since you have multiple meshes, for depth sort to work, you need to append them all together first, then depth sort that. Otherwise the opacity is only correct within each one, not amongst them.<div><div><br clear="all">
David E DeMarle<br>
Kitware, Inc.<br>R&D Engineer<br>21 Corporate Drive<br>Clifton Park, NY 12065-8662<br>Phone: <a href="tel:518-881-4909" value="+15188814909" target="_blank">518-881-4909</a><br>
<br><br></div><div><div><div class="gmail_quote">On Thu, Jan 26, 2012 at 3:13 PM, David E DeMarle <span dir="ltr"><<a href="mailto:dave.demarle@kitware.com" target="_blank">dave.demarle@kitware.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Use depth peeling.<div><a href="http://www.vtk.org/Wiki/VTK/Depth_Peeling" target="_blank">http://www.vtk.org/Wiki/VTK/Depth_Peeling</a></div><div><br></div><div>Or vtkDepthSortPolyData before rendering.</div><div><br clear="all">
David E DeMarle<br>
Kitware, Inc.<br>R&D Engineer<br>21 Corporate Drive<br>Clifton Park, NY 12065-8662<br>Phone: <a href="tel:518-881-4909" value="+15188814909" target="_blank">518-881-4909</a><br>
<br><br><div class="gmail_quote"><div><div>On Thu, Jan 26, 2012 at 3:10 PM, Nicolas Rannou <span dir="ltr"><<a href="mailto:nicolas.lists@gmail.com" target="_blank">nicolas.lists@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>
Hello,<div><br></div><div>I have several meshes I want to visualize.</div><div><br></div><div>If I decrease the opacity of those meshes, the visualization goes wrong:</div><div>I don't see a nice "superposition effect", instead I only see the "last" object "in the ray".</div>
<div><br></div><div>Decreasing the opacity,</div><div>- paraview has the expected behavior</div><div>- the vtk example (<a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/Opacity" target="_blank">http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/Opacity</a>) has the wrong behavior.</div>
<div><br></div>
<div>I could find which option to use to enable a proper behavior...</div><div><br></div><div>Thanks,</div><div>Nicolas </div>
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