Hi all,
regarding the question yesterday about the problem with the
compositeviewer, I attach the fragment of code that i am using. Has somebody
any idea about where is the problem? Thank you very much.
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
osg::GraphicsContext::Traits;
// Init the Windata Variable that holds the handle for the Window to display
OSG in.
osg::ref_ptr<osg::Referenced> windata = new
osgViewer::GraphicsWindowWin32::WindowData(GetSafeHwnd());
// Setup the traits parameters
traits->x = 0;
traits->y = 0;
traits->width = RectDLG.right - RectDLG.left;
traits->height = RectDLG.bottom - RectDLG.top;
traits->windowDecoration = false;
traits->doubleBuffer = true;
traits->sharedContext = 0;
traits->setInheritedWindowPixelFormat = true;
traits->inheritedWindowData = windata;
// Create the Graphics Context
osg::GraphicsContext* gc =
osg::GraphicsContext::createGraphicsContext(traits.get());
// view 1: for 3D model
/* Create the scene data */
//....
osgViewer::View* view1 = new osgViewer::View();
view1->getCamera()->setViewport(new
osg::Viewport(traits->width/2,traits->y,traits->width/2,traits->height));
view1->getCamera()->setProjectionMatrixAsPerspective(30.0f,
static_cast<double>(traits->width/2)/static_cast<double>(traits->height), 1.0f,
10000.0f);
view1->getCamera()->setGraphicsContext(gc);
view1->setSceneData(BackgroundRoot);
// view 2: for Background image
/* Create the background image graph */
//....
osgViewer::View* view2 = new osgViewer::View();
view2->setSceneData(hudRoot);
view2->getCamera()->setViewport(new
osg::Viewport(0,0,traits->width,traits->height));
view2->getCamera()->setProjectionMatrixAsPerspective(30.0f,
static_cast<double>(traits->width)/static_cast<double>(traits->height), 1.0f,
10000.0f);
view2->getCamera()->setGraphicsContext(gc);
view2->setSceneData(ModelRoot);
// Attach views to CompositeViewer
sceneView->addView(view2); // Draw first?
sceneView->addView(view1);
----- Original Message -----
From: David Oyarzun
To: osg-users@lists.openscenegraph.org
Sent: Tuesday, December 02, 2008 6:09 PM
Subject: problems with CompositeViewer
Hi all,
I think I have a problem with the render order of the CompositeViewer.
I am trying to program a osg-based windowed application that shows a 3D
animated object centered in the right middle of the window. Moreover, it has a
background image that fills all the window, including the right middle (behind
the 3D model). I want that the application is modular, in the sense that
depending the initial width and height fo the window, the 3D object appears
always centered in the right middle.
For doing that, I have created a CompositeViewer with 2 views, one of them
setting the viewport to all the window and putting the background as SceneData,
and the other one with the right middle size for putting the 3D object, but I
only see the backgorund image. It seems like the backgorund image is always in
the front, because if I delete its view, the 3D object is well positioned.
Could be something related with the render order? If it is, how could I
tell CompositeViewer to draw the background before the 3D model? Else, is it a
good idea using the CompositeViewer for this kind of issue?
Thank you in advance,
David.
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