Hi all
I have a composite viewer, where the main camera renders to texture. No I added
a slave camera (POST_RENDER that uses the same graphics context as the main
camera). I had a screen quad child on which I would like to render the texture
from the main camera. But all I get is a black screen.
Regards
Daniel
[code]
osg::Camera* camera = new osg::Camera;
// set the projection matrix
camera->setProjectionMatrix(osg::Matrix::ortho2D(0,1920,0,1200));
// set the view matrix
camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
camera->setViewMatrix(osg::Matrix::identity());
// only clear the depth buffer
camera->setClearMask(0);
// draw subgraph after main camera view.
camera->setRenderOrder(osg::Camera::POST_RENDER);
//GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(GL_BACK);
camera->setReadBuffer(GL_BACK);
// we don't want the camera to grab event focus from the viewers main
camera(s).
camera->setAllowEventFocus(false);
camera->setGraphicsContext(a_viewer->getCamera()->getGraphicsContext());
camera->setViewport(a_viewer->getCamera()->getViewport());
camera->addChild( createScreenQuad(1.0f, 1.0f) );
osg::Camera::BufferAttachmentMap& map =
a_viewer->getCamera()->getBufferAttachmentMap();
osg::Texture* input = map[osg::Camera::COLOR_BUFFER0]._texture.get();
camera->getOrCreateStateSet()->setTextureAttributeAndModes(0, input);
a_viewer->addSlave(camera, false);
[/code]
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