[osg-users] MiniMap/PIP
Hi,
So I am trying to create a mini-map/PIP. I have an existing program with scene
that runs inside a Qt Widget. I have a class, NetworkViewer, which extends
CompositeViewer. In NetworkViewer's constructor I call the following function.
Notice the root is the scene which is populated elsewhere.
Code:
void NetworkViewer::init() {
root = new osg::Group() ;
viewer = new osgViewer::View( );
viewer->setSceneData( root ) ;
osg::Camera* camera ;
camera = createCamera(0,0,100,100) ;
viewer->setCamera( camera );
viewer->addEventHandler( new NetworkGUIHandler( (GUI*)view ) ) ;
viewer->setCameraManipulator(new osgGA::TrackballManipulator) ;
viewer->getCamera()->setClearColor(
osg::Vec4( LIGHT_CLOUD_BLUE_F,0.0f));
addView( viewer );
osgQt::GraphicsWindowQt* gw =
dynamic_cast( camera->getGraphicsContext() );
QWidget* widget = gw ? gw->getGLWidget() : NULL;
QGridLayout* grid = new QGridLayout( ) ;
grid->addWidget( widget );
grid->setSpacing(1);
grid->setMargin(1);
setLayout( grid );
initHUD( ) ;
}
The create camera function is as follows:
Code:
osg::Camera* createCamera( int x, int y, int w, int h ) {
osg::DisplaySettings* ds = osg::DisplaySettings::instance().get();
osg::ref_ptr traits
= new osg::GraphicsContext::Traits;
traits->windowName = "" ;
traits->windowDecoration = false ;
traits->x = x;
traits->y = y;
traits->width = w;
traits->height = h;
traits->doubleBuffer = true;
traits->alpha = ds->getMinimumNumAlphaBits();
traits->stencil = ds->getMinimumNumStencilBits();
traits->sampleBuffers = ds->getMultiSamples();
traits->samples = ds->getNumMultiSamples();
osg::ref_ptr camera = new osg::Camera;
camera->setGraphicsContext( new osgQt::GraphicsWindowQt(traits.get()) );
camera->setViewport( new osg::Viewport(0, 0, traits->width, traits->height) );
camera->setViewMatrix(osg::Matrix::translate(-10.0f,-10.0f,-30.0f));
camera->setProjectionMatrixAsPerspective(
20.0f,
static_cast(traits->width)/static_cast(traits->height),
1.0f, 1.0f );
return camera.release();
}
I have been looking at several camera examples and searching for a solution for
a while to no avail. What I am really looking for is the background being my
main camera which takes up most of the screen and displays the scene graph
while my mini-map appears in the bottom right. It has the same scene as the
main camera but is overlaid on top of it and has its own set of controls for
selection etc since it will have different functionality.
I was thinking that perhaps by adding another camera as a slave I would be able
to do this:
Code:
camera = createCamera(40,40,50,50) ;
viewer->addSlave(camera) ;
But this doesn't seem to work. If I disable the other camera I do see a clear
area that it appears this camera was suppose to be rendering in (its viewport)
but that doesn't help. I've played around with rendering order thinking it
could be that to no avail.
Any ideas? What it the best way to do such a minimap is? What am I doing wrong?
Also anyway to make the rendering of the minimap circular instead of
rectangular?
Thanks,
David
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=50823#50823
___
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Building a slimmed down static version of OSG
Hi Preet,
Did you make any progress on this? I'm getting a similar error and I am
stumped. I have a fedora 16 32bit machine with osg 3.0.1 where my code compiles
fine and then I have a fedora 17 64bit machine also with osg 3.0.1 where I get
this undefined reference.
I added a "virtual void requestRedraw(){} ;" to the GraphicsWindowEmbedded
header file just to see what would happen and it compiles but I get a crash
right away on an addChild in Qt land.
Thanks,
David
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=48421#48421
___
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG, QT, and QTabWidget
Hi, I have discovered this problem is not only because of the qtab but it happens depending on the qt layout. I asked the question on StackOverflow, perhaps worded a little better and I have created a demo program to demonstrate the issue. Anyone have any ideas on whats wrong? http://stackoverflow.com/questions/10560706/qt-and-osg-integration-issue-scene-graph-disappearing http://mokon.net/ex/ Thanks, David -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=47662#47662 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] OSG, QT, and QTabWidget
Hi, So I've had a working program that integrates OSG with QT and its been working nicely until today. I'm using a osgViewer and I repaint the osg graph with a timer which when expired does some things which possibly modify the scene graph and then I call the frame function. This has been working flawlessly until today. I added a QTabWidget to my qt code and the scene graph disappears. If I comment out that QTabWidget add everything comes back... I saw this post: forum openscenegraph org viewtopic php?t=7239 (edited since I guess we can't post links here until two posts to prevent spam ;-)) But I tried those changes but it doesn't work. I'm also not entirely sure I understand the key reasons on why those changes were needed. In fact I can confirm my repainting function is being called. Any ideas what might be going wrong? Thanks, David -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=47653#47653 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Drawing Line
Hello,
I'm having trouble with drawing a line.
A little background. I have a graph with vertices and edges represented in the
boost graph library. I am using boost to find some coordinates for me to layout
the graph graphically. For each vertex I then draw a model at its location. For
each edge I then attempt to draw a line between the locations of the models.
Problem is that doesn't work. The lines go from the origin to the vertices. It
does not go from vertex to vertex. Now some code:
Code:
for ( ; it != end ; ++it ) {
VertexID id = *it ;
Vertex* vertex = &(*ng)[id] ;
osg::ref_ptr cModel =
(osg::Node*)model->clone(osg::CopyOp::DEEP_COPY_NODES ) ;
printf( "%d, x=%f, y=%f, z=%f\n", id, vertex->point[0], 0.0f, vertex->point[1]
) ;
osg::ref_ptr transform = new
osg::PositionAttitudeTransform( ) ;
transform->setPosition( osg::Vec3f( vertex->point[0], 0.0f, vertex->point[1] )
) ;
transform->addChild( cModel ) ;
root->addChild( transform ) ;
}
boost::tie( eit, eend ) = edges(*ng) ;
for( ; eit != eend ; ++eit ) {
EdgeID ide = *eit ;
Edge& edge = (*ng)[ide] ;
VertexID srcId = source( ide, *ng ) ;
VertexID dstId = target( ide, *ng ) ;
Vertex* src = &(*ng)[srcId] ;
Vertex* dst = &(*ng)[dstId] ;
printf( "%d, x=%f, y=%f, z=%f\n", dstId, dst->point[0], 0.0f, dst->point[1] ) ;
printf( "%d, x=%f, y=%f, z=%f\n", srcId, src->point[0], 0.0f, src->point[1] ) ;
osg::Geometry* lg = new osg::Geometry( ) ;
osg::Vec3Array* vs = new osg::Vec3Array( ) ;
vs->push_back( osg::Vec3f( src->point[0], 0.0f, src->point[1] ) ) ;
vs->push_back( osg::Vec3f( dst->point[0], 0.0f, dst->point[1] ) ) ;
lg->setVertexArray( vs );
osg::ref_ptr da = new osg::DrawArrays(
osg::PrimitiveSet::LINES, 1, 2 ) ;
lg->addPrimitiveSet( da ) ;
osg::ref_ptr lgeode = new osg::Geode( ) ;
lgeode->addDrawable( lg ) ;
root->addChild( lgeode ) ;
}
Now consider these two vertices:
0, x=10.00, y=0.00, z=0.00
1, x=9.510565, y=0.00, z=3.090170
I add the model at each of them with a transform and then I draw a line from
one point to another. No translations are done as seen in the code above.
So, what am I doing wrong? Do I need to draw a line and then translate it?
Thanks!
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=43477#43477
___
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
