I created an HUD with the following code:
Code:
//SETUP HUD
m_rootHUD = new osg::Group();
// create a camera to set up the projection and model view matrices, and the
subgraph to drawn in the HUD
m_cameraHUD = new osg::Camera;
// set the projection matrix
m_cameraHUD->setProjectionMatrix(osg::Matrix::ortho2D(0,1280,0,1024));
// set the view matrix
m_cameraHUD->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
m_cameraHUD->setViewMatrix(osg::Matrix::identity());
// only clear the depth buffer
m_cameraHUD->setClearMask(GL_DEPTH_BUFFER_BIT);
// draw subgraph after main camera view.
m_cameraHUD->setRenderOrder(osg::Camera::POST_RENDER);
// we don't want the camera to grab event focus from the viewers main
camera(s).
m_cameraHUD->setAllowEventFocus(false);
m_cameraHUD->addChild(m_rootHUD);
osgViewer::Viewer::Windows windows;
m_viewer->getWindows(windows);
if (windows.empty())
{
std::cout << "error: no windows\n";
exit(1);
}
// set up cameras to rendering on the first window available.
m_cameraHUD->setGraphicsContext(windows[0]);
m_cameraHUD->setViewport(0,0,windows[0]->getTraits()->width,
windows[0]->getTraits()->height);
Then I add some stuff to the group root node. Then I add the camera to the
viewer with the following code.
Code:
unsigned int slaveID = m_viewer->getNumSlaves();
m_viewer->addSlave(m_cameraHUD, false);
Now, when I decide I want to remove the HUD with the following code, it removes
but the HUD is still visible.
Code:
if (!m_viewer->removeSlave(slaveID))
{
std::cout << "error removing slave " << slaveID << "\n";
exit(1);
}
Shouldn't that command remove the HUD from the screen?
Thank you
Brian[/code]
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http://forum.openscenegraph.org/viewtopic.php?p=32222#32222
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