HI Nikita,

The way to do overlays like this is to render using a Camera with an
orthographic projection that effectively creates a 2D view, then just
create the geometry your draw in the standard OSG way using Nodes,
Geometry and StateSet as you'd do with a 3D scene graph.  The osghud
example shows various ways of creating this extra view.  The OSG's
onscreen stats also has a frame rate profile chart that is similar to
what you'll need to show, have a look at
src/osgViewer/StatsHandler.cpp.

Robert.

On 19 June 2014 08:28, Nikita Petrov <[email protected]> wrote:
> Hi,
>
> I'm developing application with osgEarth. What I want to do now is a plane 
> flying in the sky and in the bottom of the screen I want to show vertical 
> profile of the flight H(t). I've tried to find something to draw charts on 
> overlay (HUD) in OSG, but found nothing! I don't believe that there is no 
> such basic thing in OSG.
> The question is how I should do it? What is the easiest way? I'm working with 
> 3D graphics only for several months, so I'm at the beginner level. :)
>
> Thank you!
>
> Cheers,
> Nikita
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=59808#59808
>
>
>
>
>
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