<div dir="ltr">Hi Sankhesh,<div><br></div><div>I've tried setting the camera and focal point parameters without using SetProjectionMatrix() and SetModelViewTransformMatrix(), and I've also tried just calling SetProjectionMatrix() and SetModelViewTransformMatrix() by themselves. Neither approach seemed to have an effect on the scene. I was looking through the documentation and was wondering if I need to use the function vtkCamera::vtkSetUseExplicitProjectionTransformMatrix(bool) to solve the problem?</div><div><br></div><div>Thanks,</div><div>Elaine</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jul 20, 2017 at 11:12 AM, Sankhesh Jhaveri <span dir="ltr"><<a href="mailto:sankhesh.jhaveri@kitware.com" target="_blank">sankhesh.jhaveri@kitware.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="m_-7741260002236855523m_231165425845248325markdown-here-wrapper" style="font-family:'Lucida Sans',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">Could you please provide more details on how you’re trying to set the camera parameters?<br>The way the external camera works is that it ignores the camera position and focal point parameters if the projection and model view matrices are set explicitly using  <code style="font-size:0.95em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(218,218,218);background-color:rgb(232,232,232);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;display:inline">vtkExternalOpenGLCamera::<wbr>SetProjectionMatrix()</code> and <code style="font-size:0.95em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(218,218,218);background-color:rgb(232,232,232);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;display:inline">vtkExternalOpenGLCamera::<wbr>SetModelViewTransformMatrix()</code></p>
<p style="margin:0px 0px 1.2em!important">Thanks,<br>Sankhesh</p>
<div title="MDH:SGksPGRpdj48YnI+PC9kaXY+PGRpdj5Db3VsZCB5b3UgcGxlYXNlIHByb3ZpZGUgbW9yZSBkZXRh
aWxzIG9uIGhvdyB5b3UncmUgdHJ5aW5nIHRvIHNldCB0aGUgY2FtZXJhIHBhcmFtZXRlcnM/PC9k
aXY+PGRpdj5UaGUgd2F5IHRoZSBleHRlcm5hbCBjYW1lcmEgd29ya3MgaXMgdGhhdCBpdCBpZ25v
cmVzIHRoZSBjYW1lcmEgcG9zaXRpb24gYW5kIGZvY2FsIHBvaW50IHBhcmFtZXRlcnMgaWYgdGhl
IHByb2plY3Rpb24gYW5kIG1vZGVsIHZpZXcgbWF0cmljZXMgYXJlIHNldCBleHBsaWNpdGx5IHVz
aW5nICZuYnNwO2B2dGtFeHRlcm5hbE9wZW5HTENhbWVyYTo6U2V0UHJvamVjdGlvbk1hdHJpeCgp
YCBhbmQgYHZ0a0V4dGVybmFsT3BlbkdMQ2FtZXJhOjpTZXRNb2RlbFZpZXdUcmFuc2Zvcm1NYXRy
aXgoKWA/PC9kaXY+PGRpdj48YnI+PC9kaXY+PGRpdj5UaGFua3MsPC9kaXY+PGRpdj5TYW5raGVz
aDwvZGl2Pg==" style="height:0;width:0;max-height:0;max-width:0;overflow:hidden;font-size:0em;padding:0;margin:0">​</div></div><div><div class="h5"><br><div class="gmail_quote"><div dir="ltr">On Wed, Jul 19, 2017 at 9:59 AM elainejiang8 <<a href="mailto:elainejiang8@gmail.com" target="_blank">elainejiang8@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi everyone!<br>
<br>
I'm building a program that uses the externalVTKWidget to volume render an<br>
object in an OpenGL context. Right now, I'm calling<br>
<br>
*ren->GetActiveCamera();<br>
*<br>
<br>
(where ren is a vtkExternalOpenGLRenderWindow instance) in my render<br>
function so I can control the position and focal point of the camera.<br>
However, I'm unable to get the camera to actually have any effect on the<br>
scene. The documentation for vtkExternalOpenGLCamera is rather slim, and I<br>
can't find any similar examples, so I am a bit stuck on this issue.<br>
<br>
Does anyone have any insight into how I could approach this problem? Thanks<br>
in advance!<br>
<br>
Elaine<br>
<br>
<br>
<br>
--<br>
View this message in context: <a href="http://vtk.1045678.n5.nabble.com/Using-vtkExternalOpenGLCamera-tp5744015.html" rel="noreferrer" target="_blank">http://vtk.1045678.n5.nabble.<wbr>com/Using-<wbr>vtkExternalOpenGLCamera-<wbr>tp5744015.html</a><br>
Sent from the VTK - Users mailing list archive at Nabble.com.<br>
______________________________<wbr>_________________<br>
Powered by <a href="http://www.kitware.com" rel="noreferrer" target="_blank">www.kitware.com</a><br>
<br>
Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" rel="noreferrer" target="_blank">http://www.kitware.com/<wbr>opensource/opensource.html</a><br>
<br>
Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" rel="noreferrer" target="_blank">http://www.vtk.org/Wiki/VTK_<wbr>FAQ</a><br>
<br>
Search the list archives at: <a href="http://markmail.org/search/?q=vtkusers" rel="noreferrer" target="_blank">http://markmail.org/search/?q=<wbr>vtkusers</a><br>
<br>
Follow this link to subscribe/unsubscribe:<br>
<a href="http://public.kitware.com/mailman/listinfo/vtkusers" rel="noreferrer" target="_blank">http://public.kitware.com/<wbr>mailman/listinfo/vtkusers</a><br>
</blockquote></div></div></div></div><span class="HOEnZb"><font color="#888888"><div dir="ltr">-- <br></div><div class="m_-7741260002236855523gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div class="m_-7741260002236855523inbox-markdown-here-wrapper" style="font-family:'proza libre',sans-serif;color:rgb(0,56,107)"><h5 id="m_-7741260002236855523inbox-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="m_-7741260002236855523inbox--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/" target="_blank">Kitware</a> | <a href="tel:(518)%20881-4417" value="+15188814417" target="_blank">(518) 881-4417</a></h6>
<div title="MDH:PGIgc3R5bGU9ImZvbnQtZmFtaWx5OiB2ZXJkYW5hLCBzYW5zLXNlcmlmOyBjb2xvcjogcmdiKDEx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" style="height:0px;width:0px;max-height:0px;max-width:0px;overflow:hidden;font-size:0em;padding:0px;margin:0px">​</div></div></div></div>
</font></span></blockquote></div><br></div>