Hi all,
I want to do an RTT of the current camera to do some PostProcesses on it
(using shaders). When the geometry is textured, everything works ok, but
when i use non-textured objects, the objects renders in black. I tryed
the code in osgprerender example in my app and it does the same thing,
but the osgprerender example works correctly (with the cessna model for
ex.). I Attach an image of the result.
Here is the code i use:
/// Texture for RTT ///
{
sourceSceneTexture = new osg::Texture2D;
sourceSceneTexture->setTextureSize(textureWidth, textureHeight);
sourceSceneTexture->setInternalFormat(GL_RGBA);
sourceSceneTexture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
sourceSceneTexture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
}
// Geode without ilumination for attaching the RTT
rttPlaneGroup = new osg::Group;
osg::ref_ptr<osg::Geode> geo = new osg::Geode;
geo->setName("PlanoGeode");
osg::StateSet* ss = geo->getOrCreateStateSet();
ss->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
finalPlaneGeometry = new osg::Geometry();
finalPlaneGeometry->setName("PlanoGeometry");
geo->addDrawable(finalPlaneGeometry.get());
osg::Vec3Array* vertex = new osg::Vec3Array;
vertex->push_back( osg::Vec3 (0,0,0) ); // down left
vertex->push_back( osg::Vec3 (1,0,0) ); // down right
vertex->push_back( osg::Vec3 (1,1,0) ); // up right
vertex->push_back( osg::Vec3 (0,1,0) ); // up left
finalPlaneGeometry->setVertexArray(vertex);
GLuint vertplane[4] = {3,2,1,0};
finalPlaneGeometry->addPrimitiveSet(new
osg::DrawElementsUInt(osg::PrimitiveSet::QUADS, 4, vertplane));
osg::Vec4Array* colors = new osg::Vec4Array;
colors->push_back(osg::Vec4(1.0, 1.0, 1.0, 1.0));
colors->push_back(osg::Vec4(1.0, 1.0, 1.0, 1.0));
colors->push_back(osg::Vec4(1.0, 1.0, 1.0, 1.0));
colors->push_back(osg::Vec4(1.0, 1.0, 1.0, 1.0));
finalPlaneGeometry->setColorArray(colors);
finalPlaneGeometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
osg::Vec2Array* tcoords = new osg::Vec2Array(4);
(*tcoords)[0].set(0.0f, 0.0f);
(*tcoords)[1].set(1.0f, 0.0f);
(*tcoords)[2].set(1.0f, 1.0f);
(*tcoords)[3].set(0.0f, 1.0f);
finalPlaneGeometry->setTexCoordArray(0, tcoords);
geo->addDrawable(finalPlaneGeometry);
rttPlaneGroup->addChild(geo.get());
/////////////FBO -
Scene////////////////////////////////////////////////////////
// then create the camera node to do the render to texture
{
camShot = new osg::Camera;
camShot->setName("CamShot");
camShot->setClearColor(osg::Vec4(0.7,0.1,0.3,1));
camShot->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
camShot->setProjectionMatrix(osg::Matrix::identity());
camShot->setViewMatrix(osg::Matrix::identity());
camShot->setReferenceFrame(osg::Transform::RELATIVE_RF);
camShot->setViewport(0, 0, textureWidth, textureHeight);
camShot->setRenderOrder(osg::Camera::PRE_RENDER);
camShot->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT);
camShot->attach(osg::Camera::COLOR_BUFFER, sourceSceneTexture);
camShot->addChild(root);
rttPlaneGroup->addChild(camShot.get());
}
osg::ref_ptr<osg::Camera> camPlano = new osg::Camera;
camPlano->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
camPlano->setProjectionMatrixAsOrtho2D(0, 1, 0, 1);
camPlano->setViewMatrix(osg::Matrix::identity());
camPlano->setName("CamPlano");
camPlano->setClearColor(osg::Vec4(0.0,0.0,0.0,1.0));
camPlano->addChild(geo.get());
rttPlaneGroup->addChild(camPlano.get());
osg::StateSet* stateset = new osg::StateSet;
stateset->setTextureAttributeAndModes(0, sourceSceneTexture
,osg::StateAttribute::ON);
rttPlaneGroup->setStateSet(stateset);
where root is the original scene and rttPlaneGroup the final render group.
Thanks in advance!!
J.
