A followup: inserting the following line into both #else branches fixes it const unsigned int ctx = state.getContextID();
2015-09-02 11:06 GMT+02:00 Christian Buchner <[email protected]>: > > Trying to build the current osgoculus master branch against Oculus SDK > 0.7.0.0 using OSG 3.2.1 > > the following code from oculusdevice.cpp is making trouble. For OSG 3.2 > the variable "ctx" is undefined. > > void OculusTextureBuffer::setRenderSurface(const osg::State& state) > { > #if(OSG_VERSION_GREATER_OR_EQUAL(3, 4, 0)) > const osg::GLExtensions* fbo_ext = state.get<osg::GLExtensions>(); > #else > const osg::FBOExtensions* fbo_ext = osg::FBOExtensions::instance(ctx, > true); > #endif > ... > > void OculusDepthBuffer::setRenderSurface(const osg::State& state) > { > #if(OSG_VERSION_GREATER_OR_EQUAL(3, 4, 0)) > const osg::GLExtensions* fbo_ext = state.get<osg::GLExtensions>(); > #else > const osg::FBOExtensions* fbo_ext = osg::FBOExtensions::instance(ctx, > true); > #endif > ... > > > 2015-09-01 16:31 GMT+02:00 Jan Ciger <[email protected]>: > >> On Tue, Sep 1, 2015 at 2:57 PM, Christian Buchner >> <[email protected]> wrote: >> > >> > In this case I am using a slightly modified DirectShow OSG plug-in, >> running >> > the osgviewer in single threaded mode. The plug-in provides an >> > osg::ImageStream and updates a texture that is displayed in the OSG >> scene. >> > The camera is an USB 3.0 model, and I would expect it to be one of the >> > fastest "web cams" out there. >> >> The DirectShow filter chain alone will add you several frames of >> latency easily. DirectShow is far from a real time, low latency API. >> >> The fact that the camera is an USB 3.0 model is a red herring - that >> only affects how fast it could *theoretically* transfer data but has >> no impact on the various buffering and processing done once the data >> are in your machine. >> >> > I am hoping that OpenGL applications also benefit from the low level >> driver support created for the Oculus and similar VR devices. >> >> Even if they didn't, even the plain old Rift DK1 has a sub 20ms >> latency. So that is certainly not the source of your problem. >> >> J. >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > >
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