I went a step further and added a second texture to the geode in texture unit
1. I now have a blue texture in unit 0 and a green texture in unit 1. If I add
a uniform texSampler = new osg::Uniform("texture", 1) to the Drawable, then it
changes the texture unit being used to 1 and now the green texture is used. So
the state is being read in correctly. It just appears as if the texture itself
never gets loaded into the texture unit. I also tried not loading a texture at
all in the Geode and then I just get all black.
-----Original Message-----
From: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Cary, Karl A.
Sent: Saturday, August 06, 2011 11:22 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] Loading different texture in child drawable than
inparent geode
I added that as well and it did nothing. I tried adding another uniform that I
set to 0 in the geode in 1 in the drawable. The drawable is overriding the
value. So it appears to be just an issue with the texture actually loading into
the texture unit.
-----Original Message-----
From: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Ulrich Hertlein
Sent: Saturday, August 06, 2011 7:56 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] Loading different texture in child drawable than in
parent geode
Hi Karl,
On 6/08/11 3:53 , Cary, Karl A. wrote:
> I have a geode that loads a shader. It loads up a texture that is meant to be
> a default
> texture. That geode then has many children drawables under it. The plan is
> that each child
> will have a different texture associated with it, but will otherwise be using
> the same
> shader and StateSet as the parent geode. If the child does not have a texture
> associated
> with it, it should use the one from the parent geode. If I put the shader in
> the geode,
> all geometry is drawn correctly. But if I try to load a different texture in
> the child
> drawable, the geode’s texture is used instead. Please help me figure out what
> I am
> missing. I’m starting to go bleary eyed!
>
> Here is the code that sets up the texture and shader in the geode (and this
> works, the
> texture loaded here shows up):
>
> stateSet = new osg::StateSet
> texSampler = new osg::Uniform(“texture”, 0);
> stateSet->addUniform(texSampler);
> stateSet->setTextureAttributeAndModes(0, texture, osg::StateAttribute::ON);
>
>...
> stateSet->setAttribute(program);
> stateSet->setAttributesAndModes(program.get(), osg::StateAttribute::ON);
> this->setStateSet(stateSet);
>
> I then attempt to load a different texture in the drawable that is attached
> to the above
> geode. Here is the code I am attempting to use:
>
> stateSet = new osg::StateSet;
> stateSet->setTextureAttributeAndModes(0, texture, osg::StateAttribute::ON |
> osg::StateAttribute::PROTECTED);
>
> this->setStateSet(stateSet);
From the code and your description I would expect this to work as well.
Did you try to duplicate the Uniform in the Drawable StateSet? Maybe this
makes a difference?
Cheers,
/ulrich
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