Further work on dome RTT
This commit is contained in:
Robert Osfield
parent
ffda14c669
commit
5bba6b4167
@ -10,10 +10,13 @@
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#include <osg/Billboard>
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#include <osg/Material>
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#include <osg/Projection>
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#include <osg/TextureCubeMap>
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#include <osg/io_utils>
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#include <osgGA/TrackballManipulator>
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#include <osgGA/FlightManipulator>
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#include <osgGA/DriveManipulator>
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#include <osgGA/StateSetManipulator>
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#include <osgUtil/SmoothingVisitor>
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@ -21,6 +24,8 @@
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#include <osgDB/ReadFile>
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#include <osgViewer/Viewer>
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#include <osgViewer/StatsHandler>
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#include <osgViewer/HelpHandler>
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using namespace osg;
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@ -68,9 +73,8 @@ osg::Node* createDistortionSubgraph(osg::Node* subgraph, const osg::Vec4& clearC
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distortionNode->addChild(camera);
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}
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// set up the render to texture camera.
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// set up the hud camera
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{
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// create the quad to visualize.
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osg::Geometry* polyGeom = new osg::Geometry();
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@ -155,12 +159,6 @@ osg::Node* createDistortionSubgraph(osg::Node* subgraph, const osg::Vec4& clearC
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// set the camera to render before the main camera.
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camera->setRenderOrder(osg::Camera::NESTED_RENDER);
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// tell the camera to use OpenGL frame buffer object where supported.
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camera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT);
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// attach the texture and use it as the color buffer.
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camera->attach(osg::Camera::COLOR_BUFFER, texture);
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// add subgraph to render
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camera->addChild(geode);
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@ -169,7 +167,7 @@ osg::Node* createDistortionSubgraph(osg::Node* subgraph, const osg::Vec4& clearC
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return distortionNode;
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}
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void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& arguments)
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void setDomeFaces(osgViewer::Viewer& viewer, osg::ArgumentParser& /*arguments*/)
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{
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osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
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@ -281,6 +279,281 @@ void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& arguments
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viewer.assignSceneDataToCameras();
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}
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struct DrawCallback : public osg::Drawable::DrawCallback
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{
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DrawCallback() {}
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virtual void drawImplementation(osg::State& state,const osg::Drawable* drawable) const
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{
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osg::notify(osg::NOTICE)<<"I am here"<<std::endl;
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osg::notify(osg::NOTICE)<<" Projection matrix "<<state.getProjectionMatrix()<<std::endl;
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osg::notify(osg::NOTICE)<<" ModelView matrix "<<state.getModelViewMatrix()<<std::endl;
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drawable->drawImplementation(state);
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}
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};
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void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& /*arguments*/)
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{
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osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
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if (!wsi)
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{
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osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
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return;
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}
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unsigned int width, height;
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wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), width, height);
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osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
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traits->x = 0;
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traits->y = 0;
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traits->width = width;
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traits->height = height;
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traits->windowDecoration = false;
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traits->doubleBuffer = true;
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traits->sharedContext = 0;
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osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
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if (!gc)
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{
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osg::notify(osg::NOTICE)<<"GraphicsWindow has not been created successfully."<<std::endl;
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return;
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}
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gc->setClearColor(osg::Vec4f(0.2f,0.2f,0.6f,1.0f));
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gc->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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int center_x = width/2;
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int center_y = height/2;
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int camera_width = 256;
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int camera_height = 256;
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int tex_width = 256;
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int tex_height = 256;
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osg::TextureCubeMap* texture = new osg::TextureCubeMap;
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texture->setTextureSize(tex_width, tex_height);
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texture->setInternalFormat(GL_RGB);
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texture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
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texture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
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texture->setWrap(osg::Texture::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
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texture->setFilter(osg::TextureCubeMap::MIN_FILTER,osg::TextureCubeMap::LINEAR);
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texture->setFilter(osg::TextureCubeMap::MAG_FILTER,osg::TextureCubeMap::LINEAR);
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// front face
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{
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osg::ref_ptr<osg::Camera> camera = new osg::Camera;
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camera->setName("Front face camera");
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camera->setGraphicsContext(gc.get());
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camera->setViewport(new osg::Viewport(center_x-camera_width/2, center_y, camera_width, camera_height));
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GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
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camera->setDrawBuffer(buffer);
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camera->setReadBuffer(buffer);
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// attach the texture and use it as the color buffer.
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camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::POSITIVE_Z);
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viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd());
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}
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// top face
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{
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osg::ref_ptr<osg::Camera> camera = new osg::Camera;
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camera->setName("Top face camera");
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camera->setGraphicsContext(gc.get());
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camera->setViewport(new osg::Viewport(center_x-camera_width/2, center_y+camera_height, camera_width, camera_height));
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GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
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camera->setDrawBuffer(buffer);
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camera->setReadBuffer(buffer);
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// attach the texture and use it as the color buffer.
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camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::POSITIVE_Y);
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viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-90.0f), 1.0,0.0,0.0));
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}
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// left face
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{
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osg::ref_ptr<osg::Camera> camera = new osg::Camera;
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camera->setName("Left face camera");
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camera->setGraphicsContext(gc.get());
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camera->setViewport(new osg::Viewport(center_x-camera_width*3/2, center_y, camera_width, camera_height));
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GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
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camera->setDrawBuffer(buffer);
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camera->setReadBuffer(buffer);
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// attach the texture and use it as the color buffer.
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camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_X);
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viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-90.0f), 0.0,1.0,0.0));
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}
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// right face
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{
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osg::ref_ptr<osg::Camera> camera = new osg::Camera;
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camera->setName("Right face camera");
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camera->setGraphicsContext(gc.get());
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camera->setViewport(new osg::Viewport(center_x+camera_width/2, center_y, camera_width, camera_height));
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GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
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camera->setDrawBuffer(buffer);
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camera->setReadBuffer(buffer);
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// attach the texture and use it as the color buffer.
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camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_X);
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viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(90.0f), 0.0,1.0,0.0));
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}
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// bottom face
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{
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osg::ref_ptr<osg::Camera> camera = new osg::Camera;
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camera->setGraphicsContext(gc.get());
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camera->setName("Bottom face camera");
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camera->setViewport(new osg::Viewport(center_x-camera_width/2, center_y-camera_height, camera_width, camera_height));
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GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
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camera->setDrawBuffer(buffer);
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camera->setReadBuffer(buffer);
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// attach the texture and use it as the color buffer.
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camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_Y);
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viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(90.0f), 1.0,0.0,0.0));
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}
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// back face
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{
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osg::ref_ptr<osg::Camera> camera = new osg::Camera;
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camera->setName("Back face camera");
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camera->setGraphicsContext(gc.get());
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camera->setViewport(new osg::Viewport(center_x-camera_width/2, center_y-2*camera_height, camera_width, camera_height));
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GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
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camera->setDrawBuffer(buffer);
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camera->setReadBuffer(buffer);
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// attach the texture and use it as the color buffer.
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camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_Z);
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viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-180.0f), 1.0,0.0,0.0));
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}
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viewer.getCamera()->setProjectionMatrixAsPerspective(90.0f, 1.0, 1, 1000.0);
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viewer.assignSceneDataToCameras();
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// distortion correction set up.
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{
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// create the quad to visualize.
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osg::Geometry* polyGeom = new osg::Geometry();
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polyGeom->setSupportsDisplayList(false);
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osg::Vec3 origin(0.0f,0.0f,0.0f);
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osg::Vec3 xAxis(1.0f,0.0f,0.0f);
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osg::Vec3 yAxis(0.0f,1.0f,0.0f);
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osg::Vec3 zAxis(0.0f,0.0f,1.0f);
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float height = 1024.0f;
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float width = 1280.0f;
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int noSteps = 50;
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osg::Vec3Array* vertices = new osg::Vec3Array;
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osg::Vec2Array* texcoords = new osg::Vec2Array;
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osg::Vec4Array* colors = new osg::Vec4Array;
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osg::Vec3 bottom = origin;
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osg::Vec3 dx = xAxis*(width/((float)(noSteps-1)));
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osg::Vec3 dy = yAxis*(height/((float)(noSteps-1)));
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osg::Vec2 bottom_texcoord(0.0f,0.0f);
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osg::Vec2 dx_texcoord(1.0f/(float)(noSteps-1),0.0f);
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osg::Vec2 dy_texcoord(0.0f,1.0f/(float)(noSteps-1));
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osg::Vec3 cursor = bottom;
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osg::Vec2 texcoord = bottom_texcoord;
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int i,j;
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for(i=0;i<noSteps;++i)
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{
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osg::Vec3 cursor = bottom+dy*(float)i;
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osg::Vec2 texcoord = bottom_texcoord+dy_texcoord*(float)i;
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for(j=0;j<noSteps;++j)
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{
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vertices->push_back(cursor);
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texcoords->push_back(osg::Vec2((sin(texcoord.x()*osg::PI-osg::PI*0.5)+1.0f)*0.5f,(sin(texcoord.y()*osg::PI-osg::PI*0.5)+1.0f)*0.5f));
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colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
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cursor += dx;
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texcoord += dx_texcoord;
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}
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}
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// pass the created vertex array to the points geometry object.
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polyGeom->setVertexArray(vertices);
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polyGeom->setColorArray(colors);
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polyGeom->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
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polyGeom->setTexCoordArray(0,texcoords);
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polyGeom->setDrawCallback(new DrawCallback);
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for(i=0;i<noSteps-1;++i)
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{
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osg::DrawElementsUShort* elements = new osg::DrawElementsUShort(osg::PrimitiveSet::QUAD_STRIP);
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for(j=0;j<noSteps;++j)
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{
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elements->push_back(j+(i+1)*noSteps);
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elements->push_back(j+(i)*noSteps);
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}
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polyGeom->addPrimitiveSet(elements);
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}
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// new we need to add the texture to the Drawable, we do so by creating a
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// StateSet to contain the Texture StateAttribute.
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osg::StateSet* stateset = polyGeom->getOrCreateStateSet();
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stateset->setTextureAttributeAndModes(0, texture,osg::StateAttribute::ON);
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stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
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osg::Geode* geode = new osg::Geode();
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geode->addDrawable(polyGeom);
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osg::ref_ptr<osg::Camera> camera = new osg::Camera;
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camera->setGraphicsContext(gc.get());
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camera->setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
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camera->setClearColor( osg::Vec4(0.1,0.1,1.0,1.0) );
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camera->setViewport(new osg::Viewport(0, 0, width/2, height/2));
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GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
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camera->setDrawBuffer(buffer);
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camera->setReadBuffer(buffer);
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camera->setReferenceFrame(osg::Camera::ABSOLUTE_RF);
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//camera->setInheritanceMask(camera->getInheritanceMask() & ~osg::CullSettings::CLEAR_COLOR & ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE);
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//camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
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camera->setProjectionMatrixAsOrtho2D(0,1280,0,1024);
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camera->setViewMatrix(osg::Matrix::identity());
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// add subgraph to render
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camera->addChild(geode);
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camera->setName("DistortionCorrectionCamera");
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osg::notify(osg::NOTICE)<<"Original Projection matrix "<<camera->getProjectionMatrix()<<std::endl;
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osg::notify(osg::NOTICE)<<" View matrix "<<camera->getViewMatrix()<<std::endl;
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viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd());
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}
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}
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int main(int argc, char** argv)
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{
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// use an ArgumentParser object to manage the program arguments.
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@ -303,6 +576,13 @@ int main(int argc, char** argv)
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setDomeCorrection(viewer, arguments);
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}
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else if (arguments.read("--faces"))
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{
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viewer.setSceneData( loadedModel );
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setDomeFaces(viewer, arguments);
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}
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else
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{
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@ -312,6 +592,14 @@ int main(int argc, char** argv)
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viewer.setSceneData( distortionNode );
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}
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viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
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// add the state manipulator
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viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
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// add the stats handler
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viewer.addEventHandler(new osgViewer::StatsHandler);
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return viewer.run();
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}
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;
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Block a user