Firt cut at full dome correction of wrap around movies and imagery
This commit is contained in:
Robert Osfield
parent
5b9883516a
commit
00e1af1902
@ -10,6 +10,7 @@
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#include <osg/Material>
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#include <osg/Texture2D>
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#include <osg/TextureRectangle>
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#include <osg/TextureCubeMap>
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#include <osg/TexMat>
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#include <osg/CullFace>
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#include <osg/ImageStream>
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@ -25,7 +26,10 @@ class MovieEventHandler : public osgGA::GUIEventHandler
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{
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public:
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MovieEventHandler() {}
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MovieEventHandler():_trackMouse(false) {}
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void setMouseTracking(bool track) { _trackMouse = track; }
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bool getMouseTracking() const { return _trackMouse; }
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void set(osg::Node* node);
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@ -91,6 +95,7 @@ protected:
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};
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bool _trackMouse;
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ImageStreamList _imageStreamList;
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};
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@ -116,7 +121,8 @@ bool MovieEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIAction
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case(osgGA::GUIEventAdapter::PUSH):
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case(osgGA::GUIEventAdapter::RELEASE):
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{
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if (_trackMouse)
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{
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osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
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osgUtil::LineSegmentIntersector::Intersections intersections;
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if (view && view->computeIntersections(ea.getX(), ea.getY(), nv->getNodePath(), intersections))
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@ -168,6 +174,7 @@ bool MovieEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIAction
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{
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osg::notify(osg::NOTICE)<<"No intersection"<<std::endl;
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}
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}
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break;
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}
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case(osgGA::GUIEventAdapter::KEYDOWN):
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@ -276,6 +283,217 @@ osg::Geometry* myCreateTexturedQuadGeometry(const osg::Vec3& pos,float width,flo
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}
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}
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osg::Geometry* createDomeDistortionMesh(const osg::Vec3& origin, const osg::Vec3& widthVector, const osg::Vec3& heightVector,
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osg::ArgumentParser& arguments)
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{
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double sphere_radius = 1.0;
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if (arguments.read("--radius", sphere_radius)) {}
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double collar_radius = 0.45;
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if (arguments.read("--collar", collar_radius)) {}
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osg::Vec3d center(0.0,0.0,0.0);
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osg::Vec3d eye(0.0,0.0,0.0);
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double distance = sqrt(sphere_radius*sphere_radius - collar_radius*collar_radius);
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if (arguments.read("--distance", distance)) {}
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bool centerProjection = false;
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osg::Vec3d projector = eye - osg::Vec3d(0.0,0.0, distance);
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osg::notify(osg::NOTICE)<<"Projector position = "<<projector<<std::endl;
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osg::notify(osg::NOTICE)<<"distance = "<<distance<<std::endl;
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// create the quad to visualize.
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osg::Geometry* geometry = new osg::Geometry();
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geometry->setSupportsDisplayList(false);
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osg::Vec3 xAxis(widthVector);
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float width = widthVector.length();
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xAxis /= width;
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osg::Vec3 yAxis(heightVector);
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float height = heightVector.length();
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yAxis /= height;
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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::Vec3d screenCenter = origin + widthVector*0.5f + heightVector*0.5f;
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float screenRadius = heightVector.length() * 0.5f;
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osg::Vec3 cursor = bottom;
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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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for(j=0;j<noSteps;++j)
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{
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osg::Vec2 delta(cursor.x() - screenCenter.x(), cursor.y() - screenCenter.y());
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double theta = atan2(delta.x(), delta.y());
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if (theta<0.0) theta += 2*osg::PI;
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double phi = osg::PI_2 * delta.length() / screenRadius;
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if (phi > osg::PI_2) phi = osg::PI_2;
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double f = distance * sin(phi);
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double e = distance * cos(phi) + sqrt( sphere_radius*sphere_radius - f*f);
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double l = e * cos(phi);
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double h = e * sin(phi);
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double gamma = atan2(h, l-distance);
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osg::Vec2 texcoord(theta/(2.0*osg::PI), 1.0-gamma/osg::PI);
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osg::notify(osg::NOTICE)<<"cursor = "<<cursor<< " theta = "<<theta<< "phi="<<phi<<" gamma = "<<gamma<<" texcoord="<<texcoord<<std::endl;
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vertices->push_back(cursor);
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colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
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texcoords->push_back(texcoord);
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cursor += dx;
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}
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// osg::notify(osg::NOTICE)<<std::endl;
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}
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// pass the created vertex array to the points geometry object.
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geometry->setVertexArray(vertices);
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geometry->setColorArray(colors);
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geometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
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geometry->setTexCoordArray(0,texcoords);
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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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geometry->addPrimitiveSet(elements);
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}
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return geometry;
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}
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void setDomeCorrection(osgViewer::Viewer& viewer, osg::ArgumentParser& arguments)
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{
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// enforce single threading right now to avoid double buffering of RTT texture
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viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
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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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while (arguments.read("--width",width)) {}
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while (arguments.read("--height",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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osg::ref_ptr<osg::Drawable> distortionCorrectionMash = createDomeDistortionMesh(osg::Vec3(0.0f,0.0f,0.0f), osg::Vec3(width,0.0f,0.0f), osg::Vec3(0.0f,height,0.0f), arguments);
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osg::Texture* texture = 0;
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for(int i=1;i<arguments.argc() && !texture;++i)
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{
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if (arguments.isString(i))
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{
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osg::Image* image = osgDB::readImageFile(arguments[i]);
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osg::ImageStream* imagestream = dynamic_cast<osg::ImageStream*>(image);
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if (imagestream) imagestream->play();
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if (image)
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{
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#if 0
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texture = new osg::TextureRectangle(image);
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#else
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texture = new osg::Texture2D(image);
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#endif
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}
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}
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}
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if (!texture)
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{
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return;
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}
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// distortion correction set up.
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{
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osg::Geode* geode = new osg::Geode();
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geode->addDrawable(distortionCorrectionMash.get());
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// new we need to add the texture to the mesh, we do so by creating a
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// StateSet to contain the Texture StateAttribute.
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osg::StateSet* stateset = geode->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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#if 0
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osg::TexMat* texmat = new osg::TexMat;
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texmat->setScaleByTextureRectangleSize(true);
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stateset->setTextureAttributeAndModes(0, texmat, osg::StateAttribute::ON);
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#endif
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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, 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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camera->setReferenceFrame(osg::Camera::ABSOLUTE_RF);
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camera->setAllowEventFocus(false);
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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,width,0,height);
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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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viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd(), false);
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}
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viewer.getCamera()->setNearFarRatio(0.0001f);
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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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@ -288,6 +506,7 @@ int main(int argc, char** argv)
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arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
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arguments.getApplicationUsage()->addCommandLineOption("--texture2D","Use Texture2D rather than TextureRectangle.");
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arguments.getApplicationUsage()->addCommandLineOption("--shader","Use shaders to post process the video.");
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arguments.getApplicationUsage()->addCommandLineOption("--dome","Use full dome distortion correction.");
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bool useTextureRectangle = true;
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bool useShader = false;
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@ -350,6 +569,12 @@ int main(int argc, char** argv)
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}
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if (arguments.read("--dome") || arguments.read("--puffer") )
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{
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setDomeCorrection(viewer, arguments);
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}
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else
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{
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for(int i=1;i<arguments.argc();++i)
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{
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if (arguments.isString(i))
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@ -370,18 +595,18 @@ int main(int argc, char** argv)
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}
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}
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}
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if (geode->getNumDrawables()==0)
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if (!viewer.getSceneData())
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{
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// nothing loaded.
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arguments.getApplicationUsage()->write(std::cout);
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return 1;
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}
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}
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// pass the model to the MovieEventHandler so it can pick out ImageStream's to manipulate.
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MovieEventHandler* meh = new MovieEventHandler();
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geode->setEventCallback(meh);
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meh->set(geode.get());
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meh->set(viewer.getSceneData());
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// report any errors if they have occured when parsing the program aguments.
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if (arguments.errors())
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@ -396,6 +621,7 @@ int main(int argc, char** argv)
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return 1;
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}
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// set the scene to render
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viewer.setSceneData(geode.get());
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