I thought the sampler value was a pointer to a texture?
I set the texture unit to 1 because we’ll need the base texture unit 0 later
on. My goal is to turn on up to 10 texture units and blend them all together.
To be more clear, he is some more code:
mGroupState = mBoundGeometry->getOrCreateStateSet();
mGroupState->getOrCreateUniform("BaseTexSampler",
osg::Uniform::SAMPLER_2D)->set(mBaseColor.get());
mGroupState->getOrCreateUniform("BaseWeight",
osg::Uniform::FLOAT)->set(mBaseWeight);
mGroupState->setTextureAttributeAndModes(BASE_TEXTURE_UNIT, mBaseColor,
osg::StateAttribute::ON);
This sets the base texture unit 1 to be bound to the mBaseColor (which is a
osg::ref_ptr<osg::Texture2D>) created before the function call.
Then, I do this right afterwards:
if (mNumLayers)
{
int indx = 0;
osg::ref_ptr<osg::Texture2D> tex = mTextureMap[indx];// iter->second;
mGroupState->getOrCreateUniform("TexLayerSampler0",
osg::Uniform::SAMPLER_2D)->set(tex.get());
mGroupState->setTextureAttributeAndModes(BASE_TEXTURE_UNIT + 1,
tex, osg::StateAttribute::OVERRIDE);
}
Here I get the texture from a std::map. And then I set the sampler to be bound
to the texture. I then bind the texture unit 2 to the texture.
-M
----------------------------------------
Marlin Rowley
Software Engineer, Staff
[cid:image002.jpg@01D39374.DEC5A2E0]
Missiles and Fire Control
972-603-1931 (office)
214-926-0622 (mobile)
marlin.r.row...@lmco.com<mailto:marlin.r.row...@lmco.com>
From: osg-users [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf
Of Robert Osfield
Sent: Thursday, April 19, 2018 2:05 PM
To: OpenSceneGraph Users <osg-users@lists.openscenegraph.org>
Subject: EXTERNAL: Re: [osg-users] Help on multitexturing..
Hi Marlin,
The sampler value should be an int, so you shouldn't pass a texture pointer to
your setting of the TexLayerSampler0 second sampler. Perhaps this was just a
copy and paste error.
As a general note, normally one would assign a base texture on texture unit 0
rather than 1.
Robert.
On 19 April 2018 at 19:06, Rowley, Marlin R
<marlin.r.row...@lmco.com<mailto:marlin.r.row...@lmco.com>> wrote:
Hello,
I’ve been wracking my brain all day on trying to figure out how to do this with
no clear examples found online.
I have this set of calls in my C++:
mGroupState = mBoundGeometry->getOrCreateStateSet();
mGroupState->getOrCreateUniform("BaseTexSampler",
osg::Uniform::SAMPLER_2D)->set(mBaseColor);
mGroupState->getOrCreateUniform("BaseWeight",
osg::Uniform::FLOAT)->set(mBaseWeight);
mGroupState->setTextureAttributeAndModes(BASE_TEXTURE_UNIT, mBaseColor,
osg::StateAttribute::ON);
I’ve bound this base texture to texture unit (BASE_TEXTURE_UNIT = 1).
Later in the code, I have this in another function if I create another layer
with another texture:
mGroupState->getOrCreateUniform("TexLayerSampler0",
osg::Uniform::SAMPLER_2D)->set(tex);
mGroupState->setTextureAttribute(BASE_TEXTURE_UNIT + 1, tex,
osg::StateAttribute::ON);
Where I’ve created a second texture and want it to reside in texture unit 2.
However, in my shader code when indexing the TexLayerSampler0, I only get base
texture.
finalColor = texture(TexLayerSampler0, LayeredTexCoords[0].st);
Which is wrong. I’m stil trying to figure out OpenGL and how it works along
with OSG so sorry for the inexperience.
-M
----------------------------------------
Marlin Rowley
Software Engineer, Staff
[cid:image002.jpg@01D39374.DEC5A2E0]
Missiles and Fire Control
972-603-1931 (office)
214-926-0622 (mobile)
marlin.r.row...@lmco.com<mailto:marlin.r.row...@lmco.com>
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