Hi Whu, How to capture stereo images will depend upon what type of stereo your application is using and which version of the OSG you are using.
The code you have provided might be roughly how you'd approach capturing a quad buffer stereo setup. You'd need to change the Camera::setReadBuffer() call to glReadBuffer() call as the Camera::setReadBuffer() method only changes internal settings of the Camera, it' doesn't apply anything OpenGL right away - these setting is only used when the Camera's subgraph is being rendered. Robert. On 8 December 2014 at 12:12, whu <[email protected]> wrote: > Dear all, > I was still trying to fetch the left-eye and right-eye images in the > stereo mode. > code as follow: > > class: class CaptureDrawCallBack : public osg::Camera::DrawCallback > the key overload function: > > void operator()(osg::RenderInfo &renderInfo) const > { > // capture , bool ,when I want to capture the screen,key press event > will switch it to be true. > if(capture) > { > // osg::ref_ptr<osg::Image> _imageL, _imageR > > _imageL->allocateImage(scwidth,scheight,1,GL_RGBA,GL_UNSIGNED_BYTE); > > _imageR->allocateImage(scwidth,scheight,1,GL_RGBA,GL_UNSIGNED_BYTE); > renderInfo.getCurrentCamera()->setReadBuffer(GL_BACK_LEFT); > _imageL->readPixels(0,0,scwidth,scheight,GL_RGBA,GL_UNSIGNED_BYTE); > osgDB::writeImageFile(*(_imageL.get()),fileNmaeL); > renderInfo.getCurrentCamera()->setReadBuffer(GL_BACK_RIGHT); > _imageR->readPixels(0,0,scwidth,scheight,GL_RGBA,GL_UNSIGNED_BYTE); > osgDB::writeImageFile(*(_imageR.get()),fileNmaeR); > capture = false; > } > } > > and in the main viewer's camera: > viewer->getCamera()->setPostDrawCallback(new > CaptureDrawCallBack()); > > the program runs successfully(thoug no high effect ,just to test the > function), with a quadro card supproted, I can see the stero effect. > > but when I capture the screen : > the two images saved by the above operation are the same, not as > expected: a left-eye iamge, a right-eye image. > > can some one give me some suggestions? > > online waiting. > > thanks. > > whu > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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