Hi art,
Thank you for your answer.
I did not success in installing the necessary plug-in to make a .ppu file.
To answer to your question about the processor: it is a child of the root
osg::Group and so is my quad.
Since yesterday I minimalized my code and I have something "working".
Actually, it's not doing anything.
It's supposed to pass through 4 units...
UnitTexture->UnitInOut->UnitInOut->UnitInOut
... which does nothing!
I tried with a fifth unit UnitOut like in some examples but it changes nothing
except that for any :
-setInputTextureIndexForViewportReference(-1)
-or setInputTextureIndexForViewportReference(0)
.. I get a black screen.
For the first UnitInOut I wrote: setInputTextureIndexForViewportReference(-1);
otherwise it crashes
I set the others to 0.
Can someone help me to get rid of these viewports?
Because I just try to pass computed textures from a shader to another for the
moment.
Thanks in advance :-*
Here is a part of the code I wrote:
Code:
osgPPU::UnitTexture* textureUnit = new osgPPU::UnitTexture(greenTexture);
osgPPU::UnitInOut* greenUnit = new osgPPU::UnitInOut();
osgPPU::UnitInOut* redUnit = new osgPPU::UnitInOut();
osgPPU::UnitInOut* blueUnit = new osgPPU::UnitInOut();
// Green Shader Attribute
osgPPU::ShaderAttribute* greenSA = new osgPPU::ShaderAttribute();
osg::Shader* greenVS = new osg::Shader(osg::Shader::VERTEX);
greenVS = osgDB::readShaderFile("Data/glsl/green.vert");
osg::Shader* greenFS = new osg::Shader(osg::Shader::FRAGMENT);
greenFS = osgDB::readShaderFile("Data/glsl/green.frag");
greenSA->setName("greenSA");
greenSA->add("textureBase2D", osg::Uniform::SAMPLER_2D);
greenSA->set("textureBase2D", 0);
greenSA->addShader(greenVS);
greenSA->addShader(greenFS);
// Green Unit
greenUnit->getOrCreateStateSet()->setAttributeAndModes(greenSA);
greenUnit->setName("greenUnit");
// we have to setup the viewport of the InOut unit, because the texture size
// is not defined until the first frame is completly run through
greenUnit->setInputTextureIndexForViewportReference(-1);
greenUnit->setViewport(new osg::Viewport(0,0, monImage->s(),
monImage->t()));
greenUnit->setInputToUniform(textureUnit,"textureBase2D",true);
gUnitTexture = greenUnit->getOrCreateOutputTexture(-1);
// Red Shader Attribute
osgPPU::ShaderAttribute* redSA = new osgPPU::ShaderAttribute();
osg::Shader* redVS = osgDB::readShaderFile("Data/glsl/red.vert");
osg::Shader* redFS = osgDB::readShaderFile("Data/glsl/red.frag");
redSA->addShader(redVS);
redSA->addShader(redFS);
redSA->setName("redSA");
redSA->add("textureBase2D", osg::Uniform::SAMPLER_2D);
redSA->set("textureBase2D", 0);
//Red Unit
redUnit->setName("redUnit");
redUnit->getOrCreateStateSet()->setAttributeAndModes(redSA);
redUnit->setInputBypass(-1);
redUnit->setInputTextureIndexForViewportReference(0);
redUnit->setInputToUniform(greenUnit,"textureBase2D",true);
and the glsl green, red and blue are of this shape:
Code:
uniform sampler2D textureBase2D;
void main()
{
gl_FragColor=texture2D(textureBase2D,gl_TexCoord[0].st)+vec4(0.5,0.0,0.0,1.0);
}
To test if it works.[/code]
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=17622#17622
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