<div dir="ltr">In 6.2 VTK used old style fixed pipeline OpenGL where glEnable(GL_LIGHTING) did something. In the new backend those commands have no impact on the rendering (aside from the external light code that acts as a translator). A fair amount has changed so you may bump into other oddities. Also be aware if you are creating the opengl Context that the new backend really wants OpenGL 3.2 or later. On some systems you can get away with asking for an old generic context and it will give you something that supports OpenGL 3.2 (nvidia I suspect), on other platforms it will not (OSX I would bet). <div><br></div><div>Thanks</div><div>Ken<br><div><br></div><div><div><br></div><div><br></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 10, 2016 at 6:15 PM, Mike Guttman <span dir="ltr"><<a href="mailto:mguttman@yahoo.com" target="_blank">mguttman@yahoo.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"><div><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"><div><div>BAM! That was it.<div><br clear="none"></div><div>I added a default vtkExternalLight and turned on lights in the GL world and it works fine now.</div><div><br clear="none"></div><div>Perhaps in 6.2 it created a default light.</div><div><div><br clear="none"></div><div><div>In initializeGL(), set up default light:</div><div dir="ltr"><font face="Courier New, courier, monaco, monospace, sans-serif"> vtkNew<vtkExternalLight> light;<br> renderer->AddExternalLight(light.GetPointer());<br></font><br></div></div><div><div>Then, to turn on the lighting:</div><div dir="ltr"><font face="Courier New, courier, monaco, monospace, sans-serif"> glEnable(GL_LIGHTING);<br> glEnable(GL_LIGHT0);<br></font></div><div dir="ltr"><br></div><div dir="ltr">And turn it off:<br></div><div dir="ltr"><font face="Courier New, courier, monaco, monospace, sans-serif"> glDisable(GL_LIGHTING);<br></font><br clear="none"></div></div></div><div>Thank you!!</div><div><br clear="none"></div><div>-Mike</div><div><br clear="none"></div><div><br clear="none"><br clear="none"></div><div><div><div><br clear="none"><div style="direction:ltr"><blockquote type="cite"><div>On Mar 10, 2016, at 1:36 PM, Aashish Chaudhary <<a href="mailto:aashish.chaudhary@kitware.com" target="_blank">aashish.chaudhary@kitware.com</a>> wrote:</div><br clear="none"><div><div dir="ltr">Hi Mike, <div><br clear="none"></div><div>One of the thing we do in external framework is get rid of default lights. So you would have to add lights to VTK yourself. Sankhesh might have more information on it (cc'd)</div><div><br clear="none"></div><div>- aashish</div></div><div><br clear="none"><div>On Thu, Mar 10, 2016 at 1:31 PM, Ken Martin <span dir="ltr"><<a rel="nofollow" shape="rect" href="mailto:ken.martin@kitware.com" target="_blank">ken.martin@kitware.com</a>></span> wrote:<br clear="none"><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">What does it look like in 7.0 when you set your opacity to 1.0 instead of 0.7?</div><div><br clear="none"><div><div><div>On Thu, Mar 10, 2016 at 1:17 PM, mguttman via vtkusers <span dir="ltr"><<a rel="nofollow" shape="rect" href="mailto:vtkusers@vtk.org" target="_blank">vtkusers@vtk.org</a>></span> wrote:<br clear="none"></div></div><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>Hi,
Just wanted to attach my nabble presence to this post, since it seemed anonymous on nabble and not visible on markmail.
I really hope there is a migration path for me from 6.2/OpenGL1. A simple surface rendering of polygon data in an vtkExternalOpenGLRenderWindow became much worse going from 6.2/OpenGL1 to 6.3/OpenGL2 (see the two pictures).
I've spent an embarrassing amount of time on this, when I should be writing, and I'm not sure what to try next.
Many thanks in advance,
Mike
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