Osg, AntTweakBar and shaders about osgrecipes HOT 3 CLOSED

Sorry for a little late.

The AntTweakBar example currently use a camera draw callback to render UI
elements. This may not be suitable for some practical uses, as draw
callbacks won't keep its own state sets. Thus when you apply shaders to
scene graph, the state will affect the AntTweakBar calls and make the final
results invalid.

A good idea to solve this is to reimplement this example using a custom
drawable which render AntTweakBar in the drawImplementation() method. I
will consider rewrite this example soon. And you are welcomed to
contribute. :-)

Thanks,

Wang Rui

2012/9/9 peterakos [email protected]

Hello.

I have only one node in scene, but i have applied shaders to it using

osg::StateSet* stateset = model_node->getOrCreateStateSet();
stateset->setAttributeAndModes( program, osg::StateAttribute::ON |
osg::StateAttribute::OVERRIDE );

It seems that the ant tweak bar window appears with a lot of problems
(black / white and the labels cannot be distinguished).

Is it tested if there are shaders applied to the scene ?

thank you for your time.

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Reply to this email directly or view it on GitHubhttps://github.com//issues/6.

from osgrecipes.

Hello. Thank you very much for your answer.

(I closed the thread by mistake)
So if i create a Drawble, which calls TwDraw() and add this drawable (using a geometry) to the scene graph, will it be ok ?

Do i have to create manually the shaders which will render the tweak bar ?
Or does the TwDraw() takes care of it manually ?

thnx.

from osgrecipes.

If you choose to derive from osg::Drawable. OSG will handle state changes
for you automatically. So the drawable which calls TwDraw() won't be
affected by the shaders unless you set one to the drawable or its parents.
It should be safe for AntTweakBar then to only work under fixed pipeline.

Wang Rui

2012/9/12 peterakos [email protected]

Hello. Thank you very much for your answer.

I closed the thread by mistake)

So if i create a Drawble, which calls TwDraw() and add this drawable
(using a geometry) to the scene graph, will it be ok ?

Do i have to create manually the shaders which will render the tweak bar ?
Or does the TwDraw() takes care of it manually ?

thnx.

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Reply to this email directly or view it on GitHubhttps://github.com//issues/6#issuecomment-8486436.

from osgrecipes.