[osg-users] Deferring loading in an DB ReaderWriter plugin

2016-11-18 Thread James Turner 
Hi,

I’m looking for some advice on deferring / stalling a DB read request for a 
period of time and then resuming it. (Or some equivalent) This is for a 
download-on-demand thing - inside the readNode() implementation I can detect 
that a given set of files needs to be downloaded, which may take many seconds 
depending on the user’s Internet connection. The download system is already 
separately threaded, but I need a way to suspend the request (or simulate the 
same) and then resume it / resubmit it.

I can imagine various solutions, eg returning a placeholder node and then when 
my download completes, re-running the load but passing in some special info 
including the placeholder as the parent. But I can also guess that this 
scenario is common enough to have some more explicit support in osgDB.

I can also imagine the Pager / Database ’s internal load queue must basically 
do what I need, if I could manipulate it directly. (Cancel the current item, 
stash it somewhere and resubmit when some condition occurs) But I’ve not seen 
any examples of doing that (I am going to look for them now).

So, any advice or thoughts are much appreciated. 

Kind regards,
James
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Re: [osg-users] Use OSG with an existing renderer in OpenGL ES

2016-11-18 Thread Chris Hanson 
Are you trying to render combined 3D scenes, or have OSG render a texture
that will be used on a surface within your other renderer's scene?

When we were faced with the second situation, what we did was to create a
whole new context (shared) for OSG let OSG render into a texture with that,
and then used the texture in the main scene.

What are you seeking to accomplish, bigger-picture wise?
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Re: [osg-users] [osgPlugins] Exporting OpenFlight from OSG and DDS textures

2016-11-18 Thread Robert Osfield 
On 18 November 2016 at 11:50, Rambabu Repaka  wrote:
> Hi,How to convert the .osg files like cessna.osg to .flt files.

To just convert files via the osgconv utility:

   osgconv cessna,osg cessna.flt

This only works for plugins that support writing of nodes, most 3d
plugins don't support writing, but in the case of OpenFlight you are
lucky it does.

Robert.
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Re: [osg-users] Rotation of a node starts clockwise and ends counter-clockwise.

2016-11-18 Thread Sebastian Messerschmidt 

Hi Rambabu,

Hi,Not like that i just asking if anyone used it previous.


You asked for some "osgTank"-model without any reasonable context 
whatsoever and not for the specific model. Also Christian even spent his 
time on pre-digesting the information for you by providing a link to the 
model AND the textures ...


Even then you should be able to use any search machine on the internet. 
The people here on the mailing list/forum usually have day-jobs and 
other things to do, than doing your search on the internet.



Quite frankly: Albeit the language barrier, I find your post rude and 
disrespectful. We tried really hard to convince you to post questions 
with context. Instead you simply keep on asking seemingly random 
questions. As far as I'm concerned, I won't invest any more time in 
answering your post until you start using questions which show that you 
tried to put some effort into getting the answer yourself.


Cheers


...

Thank you!

Cheers,
Rambabu

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Re: [osg-users] [osgPlugins] Exporting OpenFlight from OSG and DDS textures

2016-11-18 Thread Rambabu Repaka 
Hi,How to convert the .osg files like cessna.osg to .flt files.

... 

Thank you!

Cheers,
Rambabu

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[osg-users] Use OSG with an existing renderer in OpenGL ES

2016-11-18 Thread Fabien Boco 
Hi,

I'm trying to use OSG with an existing renderer. I found the FAQ about it which 
advises us to use glPush/PopAttrib to make it work 
(.../faq#CanIuseOSGwithinanexistingrenderer)

But here's my problem : I'm moving an OSG app (running with QML) from Windows 
to iOS and iOS means OpenGL ES which doesn't includes glPop/PushAttrib 
functions (glPush/PopMatrix non either).
I tried to replace concerned function with manual 
glEnable/Disable(GL_DEPTH_TEST) etc... But it doesn't work. Errors are about 
"invalid framebuffer operation"
 
Does anyone have experimented OSG with an existing renderer on iOS or know 
about this kind of problem ?

Thank you!

Cheers,
Fabien

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Re: [osg-users] Rotation of a node starts clockwise and ends counter-clockwise.

2016-11-18 Thread Rambabu Repaka 
Hi,Not like that i just asking if anyone used it previous.

... 

Thank you!

Cheers,
Rambabu

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Re: [osg-users] slice Geometry with plane

2016-11-18 Thread Robert Osfield 
On 18 November 2016 at 07:53, Trajce Nikolov NICK
 wrote:
> it is not only for display, I need handle of the sliced Geometry, something
> like what DBGS are doing, to cut triangulated cultural features on tile
> boundaries.


There aren't any utilities in the core OSG to do this, the focus being
rendering rather than model building.

Robert.
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