Hi, look at the osgprerender example where an image is attached to the RTT camera. Search for ->attach. You do not need to call readImage yourself.
rgds jp Guerrero, Michael (CIV) wrote: > After looking into this further, it seemed that using glGetTexImage > would be able to copy from a texture used as a render target (FBO). I > have tried this only to be left with a black texture that never gets > filled in. I know that function works by grabbing whatever texture is > currently bound and returning its data. Using osg, the way to do this > seemed to be the following: > > > > osg::GraphicsContext *context = cam->getGraphicsContext(); > > osg::State *currentState = context->getState(); > > > > currentState->setActiveTextureUnit(0); > > currentState->applyTextureAttribute(0, mColorTexture); > > > > osg::ref_ptr<osg::Image> imageCapture = new osg::Image; > > imageCapture->readImageFromCurrentTexture(0, false); > > > > Unfortunately imageCapture is entirely filled with zeros. > > > > Anyone have some ideas or experience with this sort of thing? > > > > Thanks, > > Michael Guerrero > > > > ------------------------------------------------------------------------ > > *From:* Guerrero, Michael (CIV) > *Sent:* Tuesday, April 01, 2008 2:23 PM > *To:* OpenSceneGraph Users > *Subject:* [osg-users] Getting the Image from a Texture2D used as a > render target > > > > Hi, I’m trying to retrieve texture data that I have rendered from video > memory back to main memory. I was initially hoping I could set up a > render target as usual and then just call GetImage on the Texture2D but > that doesn’t work. Is there any easy way to do this? > > > > Thanks, > > Michael Guerrero > > > ------------------------------------------------------------------------ > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
