OpenSceneGraph에서 런타임에 텍스처 업데이트하기

Question

외부 장치 비디오에서 프레임을 캡처하여 openSceneGraph 노드에서 렌더링해야하는 프로젝트 작업 중입니다. 나는 또한 GLSL 셰이더를 사용하고있다. 하지만 런타임에 텍스처를 업데이트하는 방법을 모르겠습니다. 다른 유니폼에 대해서는 콜백을해야하지만 glsl 및 openSceneGraph에서 샘플러에 대한 콜백을 수행해야합니까?

내 코드는 다음과 같습니다. 지금 내가 바라는 건 검은 창 뿐이야.

osg::ref_ptr<osg::Geometry> pictureQuad = osg::createTexturedQuadGeometry(osg::Vec3(0.0f,0.0f,0.0f), 
    osg::Vec3(_deviceNameToImageFrameMap[deviceName].frame->s(),0.0f,0.0f), osg::Vec3(0.0f,0.0f,_deviceNameToImageFrameMap[deviceName].frame->t()), 
    0.0f, 1.0f,_deviceNameToImageFrameMap[deviceName].frame->s(), _deviceNameToImageFrameMap[deviceName].frame->t()); 

    //creating texture and setting up parameters for video frame 
    osg::ref_ptr<osg::TextureRectangle> myTex= new osg::TextureRectangle(_deviceNameToImageFrameMap[deviceName].frame.get()); 
    myTex->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR); 
    myTex->setFilter(osg::Texture::MAG_FILTER,osg::Texture::LINEAR); 
    myTex->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE); 
    myTex->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE); 



    _videoSourceNameToNodeMap[sourceName].geode = new osg::Geode(); 
    _videoSourceNameToNodeMap[sourceName].geode->setDataVariance(osg::Object::DYNAMIC); 
    _videoSourceNameToNodeMap[sourceName].geode->addDrawable(pictureQuad.get()); 

    //apply texture to node 
    _videoSourceNameToNodeMap[sourceName].geode->getOrCreateStateSet()->setTextureAttributeAndModes(0, myTex.get(), osg::StateAttribute::ON); 
    _videoSourceNameToNodeMap[sourceName].geode->getOrCreateStateSet()->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF); 
    _videoSourceNameToNodeMap[sourceName].geode->setDataVariance(osg::Object::DYNAMIC); 

    //Set uniform sampler 
    osg::Uniform* srcFrame = new osg::Uniform(osg::Uniform::SAMPLER_2D, "srcFrame"); 
    srcFrame->set(0); 
    //Set Uniform Alpha 
    osg::Uniform* alpha = new osg::Uniform(osg::Uniform::FLOAT, "alpha"); 
    alpha->set(.5f); 
    alpha->setUpdateCallback(new ExampleCallback()); 

    //Enable blending 
    _videoSourceNameToNodeMap[sourceName].geode->getOrCreateStateSet()->setMode(GL_BLEND, osg::StateAttribute::ON); 
    //Adding blend function to node 
    osg::BlendFunc *bf = new osg::BlendFunc(); 
    bf->setFunction(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); 
    _videoSourceNameToNodeMap[sourceName].geode->getOrCreateStateSet()->setAttributeAndModes(bf); 

    //apply shader to quad 
    _videoSourceNameToNodeMap[sourceName].geode->getOrCreateStateSet()->setAttributeAndModes(program, osg::StateAttribute::ON); 
    //add Uniform to shader 
    _videoSourceNameToNodeMap[sourceName].geode->getOrCreateStateSet()->addUniform(srcFrame); 
    _videoSourceNameToNodeMap[sourceName].geode->getOrCreateStateSet()->addUniform(alpha); 

Answer 1

그냥 image->dirty()를 호출하고 해당 이미지를 사용하는 모든 텍스처는 당신이 기본 함수로이 bf->setFunction(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);을 수행 할 필요가 없습니다 자동으로

Answer 2

업데이트됩니다.