Am 29.12.2016 um 17:07 schrieb Rômulo Cerqueira:
Hi Christian,
You could traverse the scene graph and check the state sets to see if they bind
a texture to a texture unit.
Then depending on these findings, choose the correct shader code.
I appreciated it. Can you give me some example?
Basically alot of scenegraph handling is built around the
VisitorPattern. To use it, derive your visitor from the osg::NodeVisitor
base class and override the appropriate apply-functions.
There are a lot of examples in the OSG code base and the examples.
In your case you might want to consider to use the osg::Node-apply
function and simply check for a StateSet which contains the texture. In
case you find a texture you might use the proposed pragmatic shader
composition.
Simply set a "USE_TEXTURE"-define for the nodes with textures (via the
stateSet->setDefine).
Cheers
Sebastian
...
Thank you!
Cheers,
Rômulo
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=69799#69799
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