static void createDynamicViewport()
{
win->subPortByObj(staticVp);
FBOBackgroundUnrecPtr fboBckgnd = FBOBackground::create();
fboBckgnd->setFrameBufferObject(spSimpleFBO->fbo());
NodeUnrecPtr root = makeCoredNode<Group>();
root->addChild(dynamicScene);
mgr->setRoot(root);
dynamicVp = Viewport::create();
dynamicVp->setRoot (rootNode(root));
dynamicVp->setBackground(fboBckgnd);
dynamicVp->setCamera (camera);
dynamicVp->setSize (0,0, 1,1);
mgr->getNavigator()->setViewport(dynamicVp);
win->addPort(dynamicVp);
mgr->update();
}
//
// setup of the image generation stage
//
static void createAcquisitionStage()
{
size_t num_ports = win->getMFPort()->size();
if (num_ports == 0)
return;
UInt32 width = win->getWidth();
UInt32 height = win->getHeight();
Real32 a = Real32(width) / Real32(height);
width = UInt32(a*height);
Viewport* vp = staticVp;
Node* internalRoot = rootNode(mgr->getRoot());
//
// Setup the FBO
//
spSimpleFBO.reset(new SimpleFBO(width, height, true, true, true, false));
//spSimpleFBO->fbo()->setPostProcessOnDeactivate(true);
//spSimpleFBO->colorBuffer(0)->setReadBack(true);
//
// We would like to render the scene but won't detach it from its parent.
// The VisitSubTree allows just that.
//
VisitSubTreeUnrecPtr visitor = VisitSubTree::create();
visitor->setSubTreeRoot(internalRoot);
NodeUnrecPtr visit_node = makeNodeFor(visitor);
//
// The stage object does provide a render target for the frame buffer attachment.
// SimpleStage has a camera, a background and the left, right, top, bottom
// fields to let you restrict rendering to a sub-rectangle of your FBO, i.e.
// they give you a viewport.
//
SimpleStageUnrecPtr stage = SimpleStage::create();
stage->setRenderTarget(spSimpleFBO->fbo());
stage->setCamera (vp->getCamera());
stage->setBackground (vp->getBackground());
//
// Give the stage core a place to live
//
NodeUnrecPtr stage_node = makeNodeFor(stage);
stage_node->addChild(visit_node);
//
// root
// |
// +- SimpleStage
// |
// +- VisitSubTree -> ApplicationScene
//
NodeUnrecPtr root = makeCoredNode<Group>();
root->addChild(stage_node);
//
// Give the root node a place to live, i.e. create a passive
// viewport and add it to the window.
//
ViewportUnrecPtr stage_viewport = PassiveViewport::create();
stage_viewport->setRoot (stage_node);
stage_viewport->setBackground(vp->getBackground());
stage_viewport->setCamera (vp->getCamera());
win->addPort(stage_viewport);
mgr->update();
win->renderNoFinish(mgr->getRenderAction());
win->frameExit();
win->deactivate ();
//ImageUnrecPtr col_image = Image::create();
//col_image->set(Image::OSG_RGBA_PF, width, height);
//TextureObjChunk* texObj = spSimpleFBO->colorTexObj(0);
//texObj->getImage()->subImage(0, 0, 0, width, height, 1, col_image);
//col_image->write("d:/my_Test_opensg.png");
win->subPortByObj(stage_viewport);
}