Hello Karthik,<br><br>I guess you assume I did not read the posts below. However, I did.<br>Explicitly loading OpenGL 1.5 does not help in my case.<br>However, I was able to further narrow down the problem :<br>The crash happens during RenderOverlay(). If the scene has<br>
no props that are rendered as overlay, everything works.<br>If it does, it crashes with GenBuffers == NULL.<br><br>best regards,<br>Oliver<br><br><div class="gmail_quote">2010/5/27 Karthik Krishnan <span dir="ltr"><<a href="mailto:karthik.krishnan@kitware.com">karthik.krishnan@kitware.com</a>></span><br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Yes.. Please see <a href="http://www.vtk.org/pipermail/vtkusers/2007-April/090792.html" target="_blank">http://www.vtk.org/pipermail/vtkusers/2007-April/090792.html</a><br>
<br><div class="gmail_quote"><div><div></div><div class="h5">On Thu, May 27, 2010 at 3:04 PM, Oliver Kania <span dir="ltr"><<a href="mailto:kania.oliver@googlemail.com" target="_blank">kania.oliver@googlemail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div></div><div class="h5">Hello,<br>my Windows Application crashes when calling <br>
vtkRenderWindowInteractor::Render() the first time during initialization.<br>
This happens only with the official VTK 5.6 version but not with the older<br>VTK 5.2. <br>
According to the debugger, the procedure GenBuffers has address 0, and thats why the app crashes.<br>Here is the VTK code of the method where the crash happens : (bottom of stack trace)<br><br><br>void vtkPixelBufferObject::CreateBuffer()<br>
{<br> this->Context->MakeCurrent();<br> if (!this->Handle)<br> {<br> GLuint ioBuf;<br> vtkgl::GenBuffers(1, &ioBuf); ///// crash -- GenBuffers is 0 !<br> vtkGraphicErrorMacro(this->Context,"after GenBuffers");<br>
this->Handle = ioBuf;<br> }<br>}<br><br>Any help would be greatly appreciated.<br><br>Best Regards,<br><font color="#888888">Oliver <br><br><br>
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