Issues with QVTKOpenGLWidget and VTK8.2
Geoff Woodcock via vtkusers <[email protected]> Tue, 19 Mar 2019 19:59:42 +0000
| Newsgroups | gmane.comp.lib.vtk.user |
|---|---|
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Hi,
We have an application based on Qt and Vtk. It runs well on VTK8.1 However,=
after upgrading to VTK8.2, we experience problems when we first call vtkRe=
nderer::Render(). This call ultimately ends up calling vtkOpenGLState::Chec=
kState, and this fuction emits a lot of error messages which are listed bel=
ow.
I understand that the vtkOpenGLState is not initialized properly, but I can=
't seem to figure out what the proper order of initialization is supposed t=
o be. I am calling QSurfaceFormat::setDefaultFormat() before creating my QA=
pplication object. The render window initialization is pretty straightforwa=
rd:
_vtkWidget =3D new QVTKOpenGLWidget((QWidget *)nullptr);
_vtkWidget->setEnableHiDPI(true);
// VTK Renderer
_renderer =3D vtkSmartPointer<vtkRenderer>::New();
_renderer->SetLayer(0);
_rendererOverlay =3D vtkSmartPointer<vtkRenderer>::New();
_rendererOverlay->SetLayer(1);
// VTK/Qt wedded
vtkNew<vtkGenericOpenGLRenderWindow> renderWindow;
_qvtkWidget>SetRenderWindow(renderWindow);
renderWindow->SetNumberOfLayers(2);
renderWindow->AddRenderer(_renderer);
renderWindow->AddRenderer(_rendererOverlay);
The vtkOpenGLState::Initialize function is never called
I have tried switching from QVTKOpenGLWidget to QVTKOpenGLNativeWidget, whi=
ch fixes the state initialization problems (but I am unable to use it, sinc=
e it causes problems with line drawing as documented here: https://gitlab.k=
itware.com/vtk/vtk/issues/17154).
So the code works with 8.1 and also works with QVTKOpenGLNativeWidget.
Can someone help me understand what I am doing wrong with the initializatio=
n?
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 95
Error in cache state for GL_DEPTH_WRITEMASK
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 106
Error in cache state for GL_COLOR_WRITEMASK
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 124
Error in cache state for GL_CULL_FACE
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 131
Error in cache state for GL_MULTISAMPLE
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 144
Error in cache state for GL_STENCIL_TEST
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 162
Error in cache state for GL_VIEWPORT
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 173
Error in cache state for GL_SCISSOR_BOX
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 179
Error in cache state for GL_CULL_FACE_MODE
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 185
Error in cache state for GL_DEPTH_FUNC
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 191
Error in cache state for GL_BLEND_SRC_RGB
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 197
Error in cache state for GL_BLEND_SRC_ALPHA
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 203
Error in cache state for GL_BLEND_DST_RGB
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 209
Error in cache state for GL_BLEND_DST_ALPHA
Generic Warning: In d:\projects\flow-2\tools\conan\thirdparty\build\libvtk\=
rendering\opengl2\vtkopenglstate.cxx, line 222
Error in cache state for GL_COLOR_CLEAR_VALUE
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<div class=3D"WordSection1">
<p class=3D"MsoNormal">Hi,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">We have an application based on Qt and Vtk. It runs =
well on VTK8.1 However, after upgrading to VTK8.2, we experience problems w=
hen we first call vtkRenderer::Render(). This call ultimately ends up calli=
ng vtkOpenGLState::CheckState, and
this fuction emits a lot of error messages which are listed below.<o:p></o=
:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none">I understand that the =
vtkOpenGLState is not initialized properly, but I can’t seem to figur=
e out what the proper order of initialization is supposed to be. I am calli=
ng
<span style=3D"font-size:9.5pt;font-family:Consolas;color:#2B91AF">QSurface=
Format</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:blac=
k">::setDefaultFormat() before creating my QApplication object. The render =
window initialization is pretty straightforward:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"> _vtkWid=
get =3D
</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:blue">new<=
/span><span style=3D"font-size:9.5pt;font-family:Consolas;color:black"> QVT=
KOpenGLWidget((QWidget *)</span><span style=3D"font-size:9.5pt;font-family:=
Consolas;color:blue">nullptr</span><span style=3D"font-size:9.5pt;font-fami=
ly:Consolas;color:black">);<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"> _vtkWid=
get->setEnableHiDPI(</span><span style=3D"font-size:9.5pt;font-family:Co=
nsolas;color:blue">true</span><span style=3D"font-size:9.5pt;font-family:Co=
nsolas;color:black">);<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">
</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:green">// =
VTK Renderer</span><span style=3D"font-size:9.5pt;font-family:Consolas;colo=
r:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"> _renderer
</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:teal">=3D<=
/span><span style=3D"font-size:9.5pt;font-family:Consolas;color:black">
</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:#2B91AF">v=
tkSmartPointer</span><span style=3D"font-size:9.5pt;font-family:Consolas;co=
lor:black"><</span><span style=3D"font-size:9.5pt;font-family:Consolas;c=
olor:#2B91AF">vtkRenderer</span><span style=3D"font-size:9.5pt;font-family:=
Consolas;color:black">>::New();<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"> _renderer</sp=
an><span style=3D"font-size:9.5pt;font-family:Consolas;color:teal">-></s=
pan><span style=3D"font-size:9.5pt;font-family:Consolas;color:black">SetLay=
er(0);<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"> _rendererOver=
lay
</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:teal">=3D<=
/span><span style=3D"font-size:9.5pt;font-family:Consolas;color:black">
</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:#2B91AF">v=
tkSmartPointer</span><span style=3D"font-size:9.5pt;font-family:Consolas;co=
lor:black"><</span><span style=3D"font-size:9.5pt;font-family:Consolas;c=
olor:#2B91AF">vtkRenderer</span><span style=3D"font-size:9.5pt;font-family:=
Consolas;color:black">>::New();<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"> _rendererOver=
lay</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:teal">-=
></span><span style=3D"font-size:9.5pt;font-family:Consolas;color:black"=
>SetLayer(1);<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">
</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:green">// =
VTK/Qt wedded</span><span style=3D"font-size:9.5pt;font-family:Consolas;col=
or:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">
</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:#2B91AF">v=
tkNew</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:black=
"><</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:#2B9=
1AF">vtkGenericOpenGLRenderWindow</span><span style=3D"font-size:9.5pt;font=
-family:Consolas;color:black">>
renderWindow;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"> _qvtkWidget&g=
t;SetRenderWindow(renderWindow);<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"> renderWindow<=
/span><span style=3D"font-size:9.5pt;font-family:Consolas;color:teal">->=
</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:black">Set=
NumberOfLayers(2);<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"> renderWindow<=
/span><span style=3D"font-size:9.5pt;font-family:Consolas;color:teal">->=
</span><span style=3D"font-size:9.5pt;font-family:Consolas;color:black">Add=
Renderer(_renderer);<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.5pt;font-family:Consolas;=
color:black"> renderWindow</span><span style=3D"font-size=
:9.5pt;font-family:Consolas;color:teal">-></span><span style=3D"font-siz=
e:9.5pt;font-family:Consolas;color:black">AddRenderer(_rendererOverlay);</s=
pan><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">The vtkOpenGLState::Initialize function is never cal=
led<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">I have tried switching from QVTKOpenGLWidget to QVTK=
OpenGLNativeWidget, which fixes the state initialization problems (but I am=
unable to use it, since it causes problems with line drawing as documented=
here:
<a href=3D"https://gitlab.kitware.com/vtk/vtk/issues/17154">https://gitlab.=
kitware.com/vtk/vtk/issues/17154</a>).
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">So the code works with 8.1 and also works with QVTKO=
penGLNativeWidget.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Can someone help me understand what I am doing wrong=
with the initialization?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 95<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_DEPT=
H_WRITEMASK<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 106<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_COLO=
R_WRITEMASK<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 124<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_CULL=
_FACE<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 131<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_MULT=
ISAMPLE<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 144<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_STEN=
CIL_TEST<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 162<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_VIEW=
PORT<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 173<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_SCIS=
SOR_BOX<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 179<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_CULL=
_FACE_MODE<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 185<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_DEPT=
H_FUNC<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 191<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_BLEN=
D_SRC_RGB<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 197<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_BLEN=
D_SRC_ALPHA<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 203<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_BLEN=
D_DST_RGB<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 209<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Error in cache state for GL_BLEN=
D_DST_ALPHA<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:9.5pt;font-family:Consolas;color:black">Generic Warning: In d:\projects\=
flow-2\tools\conan\thirdparty\build\libvtk\rendering\opengl2\vtkopenglstate=
.cxx, line 222<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.5pt;font-family:Consolas;=
color:black">Error in cache state for GL_COLOR_CLEAR_VALUE</span><o:p></o:p=
></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
</div>
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