Hi Randall All color attachments must have same size, format, and channels count.
Cheers. 14.09.2012, 08:29, "Randall Hand" <[email protected]>: > I'm trying to write a simple app to render a scene and drop out 3 > buffers : Depth, Color (RGB), and Alpha. I've pasted the code below, > and there's an important DEFINE at the top: SHOW_ALPHA. If you set > SHOW_ALPHA to 0, that disables the COLOR_BUFFER1 (a GL_ALPHA texture > attachment to the main camera) and everything works perfectly. I set > that to 1, and then my visuals get all scrambled and I get the following > error messages: > > RenderStage::runCameraSetUp(), FBO setup failed, FBO status= 0x8cdd > Warning: RenderStage::runCameraSetUp(State&) Pbuffer does not support > multiple color outputs. > Warning: RenderStage::runCameraSetUp(State&) Pbuffer does not support > multiple color outputs. > RenderStage::runCameraSetUp(), FBO setup failed, FBO status= 0x8cdd > Warning: RenderStage::runCameraSetUp(State&) Pbuffer does not support > multiple color outputs. > Warning: RenderStage::runCameraSetUp(State&) Pbuffer does not support > multiple color outputs. > > Now, I think I can accomplish what I want using a single RGBA texture > and a fragment shader to pull out the A. Am I doing something wrong, or > is the fragment-shader route the "right" way to go? > > Code below: > > #include <osgViewer/Viewer> > > #include <osg/BlendFunc> > #include <osg/Geode> > #include <osg/TexGen> > #include <osg/Texture2D> > #include <osg/MatrixTransform> > #include <osg/LightModel> > #include <osg/Material> > #include <osgGA/NodeTrackerManipulator> > #include <osgDB/ReadFile> > #include <osgViewer/Viewer> > > #define SHOW_ALPHA 0 > #define SHOW_DEPTH 1 > #define HEIGHT_OFFSET 24 > > int main(void) { > > int width=512, height=256; > osg::ref_ptr<osg::Geode> screenQuad = new osg::Geode; > > osg::ref_ptr<osg::Texture2D> __depthTexture = new osg::Texture2D(); > osg::ref_ptr<osg::Texture2D> __maskTexture = new osg::Texture2D(); > osg::ref_ptr<osg::Texture2D> __colorTexture = new osg::Texture2D(); > osg::ref_ptr<osg::Node> model = > osgDB::readNodeFile("/Users/rhand/Documents/MagicLeap/data/MLOS-Logo.obj"); > osgViewer::Viewer V; > osg::ref_ptr<osg::Group> group = new osg::Group(); > > //model->getOrCreateStateSet()->setMode(GL_,osg::StateAttribute::OFF); > > model->getOrCreateStateSet()->setMode(GL_BLEND,osg::StateAttribute::ON); > > model->getOrCreateStateSet()->setMode(GL_DEPTH_TEST,osg::StateAttribute::ON); > > V.getCamera()->setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT); > V.getCamera()->setClearDepth(1.0); > V.getCamera()->setClearColor(osg::Vec4(0,0,0,0)); > group->addChild(model.get()); > V.setSceneData(group.get()); > > // Establish the "base" Graphics Context > osg::ref_ptr<osg::GraphicsContext::Traits> traits = new > osg::GraphicsContext::Traits; > traits->x = 0; > traits->y = HEIGHT_OFFSET; > traits->width = width; > traits->height = height; > traits->windowDecoration = true; > traits->doubleBuffer = true; > traits->sharedContext = 0; // Doesn't inherit from anything > traits->vsync = true; // Disable VSync (for now) > traits->supportsResize = false; > traits->windowName = "Color"; > osg::ref_ptr<osg::GraphicsContext> gc = > osg::GraphicsContext::createGraphicsContext(traits.get()); > > { > __depthTexture->setTextureSize(width,height); > __depthTexture->setInternalFormat(GL_DEPTH_COMPONENT); > > __depthTexture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::NEAREST); > > __depthTexture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::NEAREST); > > __depthTexture->setDataVariance( osg::Object::DYNAMIC ); > __depthTexture->setResizeNonPowerOfTwoHint( false ); > > __maskTexture->setTextureSize(width,height); > __maskTexture->setInternalFormat(GL_ALPHA); > > __maskTexture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::NEAREST); > > __maskTexture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::NEAREST); > > __maskTexture->setDataVariance( osg::Object::DYNAMIC ); > __maskTexture->setResizeNonPowerOfTwoHint( false ); > > __colorTexture->setTextureSize(width,height); > __colorTexture->setInternalFormat(GL_RGB); > > __colorTexture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::NEAREST); > > __colorTexture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::NEAREST); > > __colorTexture->setDataVariance( osg::Object::DYNAMIC ); > __colorTexture->setResizeNonPowerOfTwoHint( false ); > > osg::ref_ptr<osg::Camera> __camera = new osg::Camera(); > __camera->setGraphicsContext(gc.get()); > __camera->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); > __camera->setViewport(new osg::Viewport(0,0, traits->width, > traits->height)); > > __camera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR); > __camera->setProjectionMatrixAsPerspective(70,(height/width), > 1,200); > __camera->setClearDepth(1.0); > __camera->setViewMatrixAsLookAt( osg::Vec3(0,0,0), > osg::Vec3(0,100,0), osg::Vec3(0,0,1) ); > __camera->setRenderOrder(osg::Camera::PRE_RENDER); > > __camera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT); > __camera->attach(osg::Camera::COLOR_BUFFER0, __colorTexture); > #if SHOW_DEPTH > __camera->attach(osg::Camera::DEPTH_BUFFER, __depthTexture); > #endif > #if SHOW_ALPHA > __camera->attach(osg::Camera::COLOR_BUFFER1, __maskTexture); > #endif > V.addSlave(__camera.get(), osg::Matrixd(), osg::Matrixd()); > } > { // Make the re-usable Quad for displaying the textures > // Make the quad with a little 10px border around the edges, for > debugging > > osg::ref_ptr<osg::Drawable> quad = osg::createTexturedQuadGeometry( > osg::Vec3(10,10.0,0), > osg::Vec3(width-20,0,0),osg::Vec3(0,height-20,0), > 0, 0, 1, 1); > quad->setDataVariance( osg::Object::STATIC ); // This is > _always_ a screen-aligned quad > quad->setUseDisplayList( true ); > osg::StateSet* ss = quad->getOrCreateStateSet(); > ss->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::ON); > ss->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF); > ss->setMode(GL_LIGHTING,osg::StateAttribute::OFF); > ss->setMode(GL_BLEND, osg::StateAttribute::ON); > ss->setAttribute(new osg::BlendFunc(GL_SRC_ALPHA, > GL_ONE_MINUS_SRC_ALPHA), osg::StateAttribute::ON); > // Put the quad in a Geometry Node (Geode) and configure it for > Texture coordinates > //osg::ref_ptr<osg::Geode> *geode = new osg::Geode; > screenQuad->addDrawable( quad.get() ); > } > > #if SHOW_DEPTH > { // Display the Depth MAsk > osg::ref_ptr<osg::GraphicsContext::Traits> traits = new > osg::GraphicsContext::Traits; > traits->x = 0; > traits->y = height + (HEIGHT_OFFSET*3); > traits->width = width; > traits->height = height; > traits->windowDecoration = true; > traits->doubleBuffer = true; > traits->sharedContext = gc.get(); > traits->vsync = true; // Disable VSync (for now) > traits->supportsResize = false; > traits->windowName = "Depth"; > osg::ref_ptr<osg::GraphicsContext> this_gc = > osg::GraphicsContext::createGraphicsContext(traits.get()); > > // now create a camera > // It's an orthographic 2D camera (sized to pixel match) > // Load an identity view matrix, and set the only geometry here > to be the quad > osg::ref_ptr<osg::Camera> __camera = new osg::Camera(); > __camera->setGraphicsContext(this_gc.get()); > __camera->setViewport(new osg::Viewport(0,0, width, height)); > __camera->setClearMask(GL_COLOR_BUFFER_BIT); > __camera->setClearDepth(1.0); > __camera->setClearColor(osg::Vec4(1,0,0,0)); // Red border > __camera->setRenderOrder(osg::Camera::POST_RENDER); > > __camera->setProjectionMatrix(osg::Matrix::ortho2D(0,width,0,height)); > __camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF); > __camera->setViewMatrix(osg::Matrix::identity()); > __camera->addChild(screenQuad.get()); > osg::StateSet *ss = __camera->getOrCreateStateSet(); > ss->setTextureAttributeAndModes(0, __depthTexture, > osg::StateAttribute::ON); > > V.addSlave(__camera.get(), osg::Matrixd(), osg::Matrixd(), false); > } > #endif > #if SHOW_ALPHA > { // display the Alpha mask > osg::ref_ptr<osg::GraphicsContext::Traits> traits = new > osg::GraphicsContext::Traits; > traits->x = 0; > traits->y = 2*height+ 4*HEIGHT_OFFSET; > traits->width = width; > traits->height = height; > traits->windowDecoration = true; > traits->doubleBuffer = true; > traits->sharedContext = gc.get(); > traits->vsync = true; // Disable VSync (for now) > traits->supportsResize = false; > traits->windowName = "alpha"; > osg::ref_ptr<osg::GraphicsContext> this_gc = > osg::GraphicsContext::createGraphicsContext(traits.get()); > > // now create a camera > // It's an orthographic 2D camera (sized to pixel match) > // Load an identity view matrix, and set the only geometry here > to be the quad > osg::ref_ptr<osg::Camera> __camera = new osg::Camera(); > __camera->setGraphicsContext(this_gc.get()); > __camera->setViewport(new osg::Viewport(0,0, width, height)); > __camera->setClearMask(GL_COLOR_BUFFER_BIT); > __camera->setClearDepth(1.0); > __camera->setClearColor(osg::Vec4(0,0,0,0)); > __camera->setRenderOrder(osg::Camera::POST_RENDER); > > __camera->setProjectionMatrix(osg::Matrix::ortho2D(0,width,0,height)); > __camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF); > __camera->setViewMatrix(osg::Matrix::identity()); > __camera->addChild(screenQuad.get()); > osg::StateSet *ss = __camera->getOrCreateStateSet(); > ss->setTextureAttributeAndModes(0, __maskTexture, > osg::StateAttribute::ON); > > V.addSlave(__camera.get(), osg::Matrixd(), osg::Matrixd(), false); > } > #endif > { // display the Color mask > // now create a camera > // It's an orthographic 2D camera (sized to pixel match) > // Load an identity view matrix, and set the only geometry here > to be the quad > osg::ref_ptr<osg::Camera> __camera = new osg::Camera(); > __camera->setGraphicsContext(gc.get()); > __camera->setViewport(new osg::Viewport(0,0, width, height)); > __camera->setClearMask(GL_COLOR_BUFFER_BIT); > __camera->setClearDepth(1.0); > __camera->setClearColor(osg::Vec4(0,0,0,0)); > __camera->setRenderOrder(osg::Camera::POST_RENDER); > > __camera->setProjectionMatrix(osg::Matrix::ortho2D(0,width,0,height)); > __camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF); > __camera->setViewMatrix(osg::Matrix::identity()); > __camera->addChild(screenQuad.get()); > osg::StateSet *ss = __camera->getOrCreateStateSet(); > ss->setTextureAttributeAndModes(0, __colorTexture, > osg::StateAttribute::ON); > > V.addSlave(__camera.get(), osg::Matrixd(), osg::Matrixd(), false); > } > > V.run(); > } > > -- > Randall Hand > http://www.yeraze.com > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
