<div dir="ltr"><div class="markdown-here-wrapper" style="font-family:"Lucida Sans",Cantarell,Verdana,sans-serif;color:rgb(11,83,148)"><p style="margin:0px 0px 1.2em!important">Hi,</p>
<p style="margin:0px 0px 1.2em!important">VTK generates shaders at runtime and there are hooks in place that allow you to modify the generated shader code.</p>
<p style="margin:0px 0px 1.2em!important">Take a look a <a href="https://www.vtk.org/Wiki/Shaders_In_VTK">https://www.vtk.org/Wiki/Shaders_In_VTK</a> for some information.<br>There are some tests that exercise this functionality</p>
<ul style="margin:1.2em 0px;padding-left:2em">
<li style="margin:0.5em 0px"><a href="https://gitlab.kitware.com/vtk/vtk/blob/2fe1f778ecdab89cab7b3c5b1d8c23e7ddc5015a/Rendering/OpenGL2/Testing/Cxx/TestUserShader.cxx">TestUserShader</a></li>
<li style="margin:0.5em 0px"><a href="https://gitlab.kitware.com/vtk/vtk/blob/2fe1f778ecdab89cab7b3c5b1d8c23e7ddc5015a/Rendering/OpenGL2/Testing/Cxx/TestUserShader2.cxx">TestUserShader2</a></li>
<li style="margin:0.5em 0px"><a href="https://gitlab.kitware.com/vtk/vtk/blob/2fe1f778ecdab89cab7b3c5b1d8c23e7ddc5015a/Rendering/Volume/Testing/Cxx/TestGPURayCastUserShader.cxx">TestGPURayCastUserShader</a></li>
<li style="margin:0.5em 0px"><a href="https://gitlab.kitware.com/vtk/vtk/blob/2fe1f778ecdab89cab7b3c5b1d8c23e7ddc5015a/Rendering/Volume/Testing/Cxx/TestGPURayCastUserShader2.cxx">TestGPURayCastUserShader2</a></li>
</ul>
<p style="margin:0px 0px 1.2em!important">Hope this helps.</p>
<p style="margin:0px 0px 1.2em!important">Best,<br>Sankhesh</p>
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QmVzdCw8L2Rpdj48ZGl2PlNhbmtoZXNoPC9kaXY+" style="height:0;width:0;max-height:0;max-width:0;overflow:hidden;font-size:0em;padding:0;margin:0">​</div></div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, Dec 5, 2017 at 1:27 PM PhD Andrea Vitali <<a href="mailto:andrea.vitali1@unibg.it">andrea.vitali1@unibg.it</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear All,<br>
<br>
Which is the best way to use shaders in VTK?<br>
<br>
I need to add several vertex attributes to the existent ones. I'm using<br>
vtkOpenGLPolyDataMapper as the starting point, but I'm not able to<br>
understand how to use shaders as usually done by classic OpenGL.<br>
<br>
Are there any examples of tutorials about it?<br>
<br>
Thank you in advance,<br>
<br>
Andrea<br>
<br>
<br>
<br>
--<br>
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</blockquote></div><div dir="ltr">-- <br></div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div class="inbox-inbox-inbox-markdown-here-wrapper" style="font-family:"proza libre",sans-serif;color:rgb(0,56,107)"><h5 id="inbox-inbox-inbox-sankhesh-jhaveri" style="margin:1.3em 0px 1em;padding:0px;font-size:1.1em;border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:rgb(238,238,238);font-weight:bold;color:rgb(11,65,148)">Sankhesh Jhaveri</h5>
<h6 id="inbox-inbox-inbox--sr-research-development-engineer-kitware-http-www-kitware-com-518-881-4417" style="margin:1.3em 0px 1em;padding:0px;font-size:1em;color:rgb(11,83,148);font-family:"open sans",sans-serif;font-weight:normal"><em>Sr. Research & Development Engineer</em> | <a href="http://www.kitware.com/">Kitware</a> | (518) 881-4417</h6>
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