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Date: Tue, 9 Dec 2014 08:23:32 +0800 From: [email protected] To: [email protected] Subject: Re: [osg-users] reading the color buffer in stereo mode thanks for Robert's kind answers. Currently, my osg version is 3.3.1, and I used the QUAD_BUFFER stereo mode. Next, I will try Robert's suggestion, using glReadBuffer() and glReadPixles(). thanks very much again. @Robert whu At 2014-12-08 22:47:13, "c" <[email protected]> wrote: 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 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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