[osg-users] osgVolume::MultipassTechnique use
Robert Osfield
robert.osfield at gmail.com
Wed Apr 27 01:13:06 PDT 2016
Hi Alex,
A stack trace with debugging info would be far more useful and should be
able to pinpoint the cause of the crash, or at least give some clues of
where to look.
Also, does the osgvolume example crash when you use the MultiPassTechnique?
Robert.
On 26 April 2016 at 21:35, Alex Taylor <alextaylor at gmail.com> wrote:
> Hey all,
>
> I'm running into a segmentation violation when I attempt to use
> osgVolume::MultipassTechnique more or less as a drop in replacement for
> RayTracedTechnique using OSG 3.4. My use of RayTracedTechnique works and
> renders fine.
>
> Here is an partial code listing demonstrating my use of MultipassTechnique:
>
> * void setVolumeProperties(osg::ref_ptr<osgVolume::Volume>
> volume,osg::ref_ptr<osgVolume::VolumeTile> tile,*
> * osg::ref_ptr<osgVolume::ImageLayer> layer,
> VolumePropertyManager &volumeProperties,
> osg::ref_ptr<osgVolume::VolumeScene> volumeScene)*
> * {*
>
> * // FixedFunctionTechnique turns on GL_LIGHTING, which breaks the
> color rendering.*
> * osg::StateSet* stateset = volume->getOrCreateStateSet();*
>
> * if (volumeProperties.volumeTechnique ==
> VolumeTechnique::RayTraced){*
> * osg::ref_ptr<osgVolume::RayTracedTechnique> rayTraced = new
> osgVolume::RayTracedTechnique();*
> * tile->setVolumeTechnique(rayTraced.get());*
> * osg::ref_ptr<osg::FrontFace> frontFace(new
> osg::FrontFace(osg::FrontFace::CLOCKWISE));*
> * stateset->setAttribute(frontFace.get(),
> osg::StateAttribute::PROTECTED);*
> * layer->addProperty(new
> osgVolume::SampleDensityWhenMovingProperty(volumeProperties.sampleDensityWhenMoving));*
> * layer->addProperty(new
> osgVolume::SampleDensityProperty(volumeProperties.sampleDensity));*
> * } else if (volumeProperties.volumeTechnique ==
> VolumeTechnique::Multipass) {*
> * osg::ref_ptr<osgVolume::MultipassTechnique> multipass = new
> osgVolume::MultipassTechnique();*
> * tile->setVolumeTechnique(multipass.get());*
> * volumeScene->addChild(volume.get());*
> * volume->getOrCreateStateSet();*
> * layer->addProperty(new osgVolume::SampleRatioProperty(1.0f));*
> * layer->addProperty(new
> osgVolume::SampleRatioWhenMovingProperty(0.5f));*
>
> * } else if (volumeProperties.volumeTechnique ==
> VolumeTechnique::FixedFunction) {*
> * tile->setVolumeTechnique(new
> osgVolume::FixedFunctionTechnique());*
> * stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF |
> osg::StateAttribute::OVERRIDE);*
> * } else {*
> * throw hg::PropertyException("VolumeTechnique");*
> * }*
>
> * layer->addProperty(new
> osgVolume::TransferFunctionProperty(volumeProperties.transferFunction.get()));*
> * layer->addProperty(new
> osgVolume::AlphaFuncProperty(volumeProperties.alphaFunc));*
> * if (volumeProperties.useLighting) layer->addProperty(new
> osgVolume::LightingProperty);*
> * if (volumeProperties.useIsosurface) layer->addProperty(new
> osgVolume::IsoSurfaceProperty(volumeProperties.alphaFunc));*
> * if (volumeProperties.useMaximumIntensityProjection)
> layer->addProperty(new osgVolume::MaximumIntensityProjectionProperty());*
> * }*
>
> The following function returns the Node * that will be passed to the
> viewer. I either return a osgVolume::Volume * or osgVolume::VolumeScene *
> object depending on whether I'm using multipass rendering as my Node *.
>
> * osg::Node* BP_createPeerHelper(Volume& v,*
> * hg::SceneClient& client,*
> * const gui_objects::Cookie& owner,*
> * hg::UpdateState& us) {*
>
> * osg::ref_ptr<osgVolume::Volume> volume = new osgVolume::Volume;*
> * osg::ref_ptr<osgVolume::VolumeScene> volumeScene = new
> osgVolume::VolumeScene;*
>
> * const mxArray* data = v.getData();*
> * VolumePropertyManager volumeProperties(v,us);*
>
> * if (data != NULL && mxGetNumberOfDimensions(data) == 3 &&
> mxGetClassID(data) == mxUINT8_CLASS) {*
>
>
> * osg::ref_ptr<osgVolume::VolumeTile> tile = new
> osgVolume::VolumeTile;*
> * volume->addChild(tile.get());*
>
> * // If we are using FixedFunctionTechnique, we need to apply
> the transfer function to get a new allocated RGBA memory on the CPU to pass
> to OSG.*
> * // Otherwise, we can pass the intensity data directly to the
> card. GPU shaders does the RGBA directly.*
> * osg::ref_ptr<osg::Image> intensityImage =
> createTexture3D(data);*
> * osg::ref_ptr<osg::Image> image_3d =
> (volumeProperties.volumeTechnique == VolumeTechnique::FixedFunction) ?*
> *
> osgVolume::applyTransferFunction(intensityImage.get(),volumeProperties.transferFunction.get())
> :*
> *
> intensityImage.release();*
>
> * osg::ref_ptr<osgVolume::ImageLayer> layer = new
> osgVolume::ImageLayer(image_3d);*
> * tile->setLayer(layer.get());*
>
> *
> setVolumeProperties(volume,tile,layer,volumeProperties,volumeScene);*
>
> * // Our original implementation positioned the bbox [-0.5,0.5]
> in each dimension.*
> * // FixedFunctionTechnique applies the locator matrix to the a
> unit cube [0 1] in each dimension.*
> * // To get the equivalent spatial referencing, apply a
> translation of -0.5 to each dimension.*
> * osg::ref_ptr<osg::RefMatrix> matrix = new osg::RefMatrix();*
> * matrix->makeTranslate(-0.5,-0.5,-0.5);*
>
> * tile->setLocator(new osgVolume::Locator(*matrix));*
>
> * }*
> * else {*
> * throw hg::PropertyException("Data");*
> * }*
>
> * std::cout << "volumeScene pointer: " << volumeScene.get() <<
> std::endl;*
>
> * if (volumeProperties.volumeTechnique ==
> VolumeTechnique::Multipass)*
> * return volumeScene.release();*
> * else*
> * return volume.release();*
>
> * }*
>
> When I execute my code that previously worked with RayTracedTechnique, I
> receive the following stack trace
>
> Stack Trace (from fault):
>
> *[ 0] 0x0000000104879d04
> fl::diag::stacktrace_base::capture(fl::diag::thread_context const&,
> unsigned long) at stacktrace.cpp:175 (in
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libmwfl.dylib)*
>
> *[ 1] 0x000000010487cf9a void (anonymous
> namespace)::terminate_impl::log<char const*>(char const* const&,
> fl::diag::thread_context const&, char const*, int, char const*, bool) at
> terminate.cpp:238 (in
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libmwfl.dylib)*
>
> *[ 2] 0x000000010487ca09 fl::diag::terminate_log(char const*,
> __darwin_ucontext const*) at lock_types.hpp:362 (in
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libmwfl.dylib)*
>
> *[ 3] 0x00000001081cf0a8 (anonymous
> namespace)::crash_context::generate_crash_report_(std::__1::basic_ostream<char,
> std::__1::char_traits<char> >&) const at sighndl.cpp:1149 (in
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libmwmcr.dylib)*
>
> *[ 4] 0x00000001081cea00 (anonymous namespace)::crash_context::ctor_() at
> sighndl.cpp:1025 (in
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libmwmcr.dylib)*
>
> *[ 5] 0x00000001081cd62a mnFatalSignalHandler at sighndl.cpp:729 (in
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libmwmcr.dylib)*
>
> *[ 6] 0x00007fff90c31f1a _sigtramp+00000026 at
> /usr/lib/system/libsystem_platform.dylib+20250 (no debugging symbols found)*
>
> *[ 7] 0x0000000000000005 [unknown function] at [unknown module] (no
> module specified)*
>
> *[ 8] 0x00000001204c4e56
> osgVolume::MultipassTechnique::traverse(osg::NodeVisitor&)+00000086 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosgVolume.130.dylib+106070
> (no debugging symbols found)*
>
> *[ 9] 0x00000001204dcbf6
> osgVolume::VolumeTile::traverse(osg::NodeVisitor&)+00000438 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosgVolume.130.dylib+203766
> (no debugging symbols found)*
>
> *[ 10] 0x00000001204d7c0b
> osgVolume::VolumeScene::traverse(osg::NodeVisitor&)+00008827 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosgVolume.130.dylib+183307
> (no debugging symbols found)*
>
> *[ 11] 0x0000000143a8daf2
> osgUtil::CullVisitor::apply(osg::Group&)+00000642 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosgUtil.130.dylib+39666
> (no debugging symbols found)*
>
> *[ 12] 0x00000001204d8a79
> osgVolume::VolumeScene::accept(osg::NodeVisitor&)+00000121 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosgVolume.130.dylib+187001
> (no debugging symbols found)*
>
> *[ 13] 0x00000001438749ef osg::Group::traverse(osg::NodeVisitor&)+00000047
> at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosg.130.dylib+522735
> (no debugging symbols found)*
>
> *[ 14] 0x0000000143a8dbf0
> osgUtil::CullVisitor::apply(osg::Transform&)+00000240 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosgUtil.130.dylib+39920
> (no debugging symbols found)*
>
> *[ 15] 0x00000001438b9499
> osg::MatrixTransform::accept(osg::NodeVisitor&)+00000121 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosg.130.dylib+803993
> (no debugging symbols found)*
>
> *[ 16] 0x00000001438749ef osg::Group::traverse(osg::NodeVisitor&)+00000047
> at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosg.130.dylib+522735
> (no debugging symbols found)*
>
> *[ 17] 0x0000000143a8daf2
> osgUtil::CullVisitor::apply(osg::Group&)+00000642 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosgUtil.130.dylib+39666
> (no debugging symbols found)*
>
> *[ 18] 0x0000000143876049 osg::Group::accept(osg::NodeVisitor&)+00000121
> at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosg.130.dylib+528457
> (no debugging symbols found)*
>
> *[ 19] 0x00000001438749ef osg::Group::traverse(osg::NodeVisitor&)+00000047
> at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosg.130.dylib+522735
> (no debugging symbols found)*
>
> *[ 20] 0x0000000143a8f29d
> osgUtil::CullVisitor::apply(osg::Camera&)+00003021 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosgUtil.130.dylib+45725
> (no debugging symbols found)*
>
> *[ 21] 0x000000014381c209 osg::Camera::accept(osg::NodeVisitor&)+00000121
> at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosg.130.dylib+160265
> (no debugging symbols found)*
>
> *[ 22] 0x00000001438749ef osg::Group::traverse(osg::NodeVisitor&)+00000047
> at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosg.130.dylib+522735
> (no debugging symbols found)*
>
> *[ 23] 0x0000000143a8daf2
> osgUtil::CullVisitor::apply(osg::Group&)+00000642 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosgUtil.130.dylib+39666
> (no debugging symbols found)*
>
> *[ 24] 0x0000000143876049 osg::Group::accept(osg::NodeVisitor&)+00000121
> at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosg.130.dylib+528457
> (no debugging symbols found)*
>
> *[ 25] 0x00000001438749ef osg::Group::traverse(osg::NodeVisitor&)+00000047
> at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosg.130.dylib+522735
> (no debugging symbols found)*
>
> *[ 26] 0x0000000143b486bb osgUtil::SceneView::cullStage(osg::Matrixd
> const&, osg::Matrixd const&, osgUtil::CullVisitor*, osgUtil::StateGraph*,
> osgUtil::RenderStage*, osg::Viewport*)+00002875 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosgUtil.130.dylib+804539
> (no debugging symbols found)*
>
> *[ 27] 0x0000000143b47117 osgUtil::SceneView::cull()+00001399 at
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libosgUtil.130.dylib+798999
> (no debugging symbols found)*
>
> *[ 28] 0x00000001372607da
> SceneRendererImpl::renderScene(hg::openscenegraph::RenderTimes&,
> hg::openscenegraph::RenderCounts&, osgUtil::SceneView*, unsigned int) at
> osgSceneServer.cpp:1448 (in
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libmwosgserver.dylib)*
>
> *[ 29] 0x000000013725922e
> hg::openscenegraph::OsgSceneServer::cullAndDraw(int, bool, double, double)
> at osgSceneServer.cpp:1809 (in
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libmwosgserver.dylib)*
>
> *[ 30] 0x000000011f298082
> UIJ_call_OpenGLPaintFcn(gui_objects::scene_server::SceneServerProxy*, int,
> bool, double, double) at SceneServerPeerEvents.cpp:56 (in
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libuij.dylib)*
>
> *[ 31] 0x000000011e589414
> Java_com_mathworks_hg_peer_JavaSceneServerPeer_doDisplay at Scene.cpp:129
> (in
> /mathworks/devel/sbs/28/ataylor.Bmlhg_task1.j377265/matlab/bin/maci64/libnativehg.dylib)*
> I was wondering if either from the stack trace or my code segments if
> there is an obvious culprit in terms of my use of MultipassTechnique. I
> feel like my use is consistent with the pattern established in the shipping
> example, but I'm a bit stuck at the moment as far as next directions to
> debug my problem...
>
> Thanks as always for any help,
>
> Alex
>
>
>
>
>
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20160427/18911d38/attachment-0003.htm>
More information about the osg-users
mailing list