// Created by Thomas Hogarth 2009 // cleaned up by Stephan Huber 2013 // // this example will create a fullscreen window showing a grey box. You can interact with it via // multi-touch gestures. #import "iphoneViewerAppDelegate.h" #include #include //include the iphone specific windowing stuff #include @implementation iphoneViewerAppDelegate @synthesize _window; osg::Camera* createHUD(unsigned int w, unsigned int h) { // create a camera to set up the projection and model view matrices, and the subgraph to draw in the HUD osg::Camera* camera = new osg::Camera; // set the projection matrix camera->setProjectionMatrix(osg::Matrix::ortho2D(0,w,0,h)); // set the view matrix camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF); camera->setViewMatrix(osg::Matrix::identity()); // only clear the depth buffer camera->setClearMask(GL_DEPTH_BUFFER_BIT); // draw subgraph after main camera view. camera->setRenderOrder(osg::Camera::POST_RENDER); // we don't want the camera to grab event focus from the viewers main camera(s). camera->setAllowEventFocus(false); // add to this camera a subgraph to render { osg::Geode* geode = new osg::Geode(); std::string timesFont("fonts/arial.ttf"); // turn lighting off for the text and disable depth test to ensure it's always ontop. osg::StateSet* stateset = geode->getOrCreateStateSet(); stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF); osg::Vec3 position(50.0f,h-50,0.0f); { osgText::Text* text = new osgText::Text; geode->addDrawable( text ); text->setFont(timesFont); text->setPosition(position); text->setText("A simple multi-touch-example\n1 touch = rotate, \n2 touches = drag + scale, \n3 touches = home"); } camera->addChild(geode); } return camera; } class TestMultiTouchEventHandler : public osgGA::GUIEventHandler { public: TestMultiTouchEventHandler(osg::Group* parent_group) : osgGA::GUIEventHandler(), _cleanupOnNextFrame(false) { createTouchRepresentations(parent_group, 10); } private: void createTouchRepresentations(osg::Group* parent_group, unsigned int num_objects) { // create some geometry which is shown for every touch-point for(unsigned int i = 0; i != num_objects; ++i) { std::ostringstream ss; osg::Geode* geode = new osg::Geode(); osg::ShapeDrawable* drawable = new osg::ShapeDrawable(new osg::Box(osg::Vec3(0,0,0), 100)); drawable->setColor(osg::Vec4(0.5, 0.5, 0.5,1)); geode->addDrawable(drawable); ss << "Touch " << i; osgText::Text* text = new osgText::Text; geode->addDrawable( text ); drawable->setDataVariance(osg::Object::DYNAMIC); _drawables.push_back(drawable); text->setFont("fonts/arial.ttf"); text->setPosition(osg::Vec3(110,0,0)); text->setText(ss.str()); _texts.push_back(text); text->setDataVariance(osg::Object::DYNAMIC); osg::MatrixTransform* mat = new osg::MatrixTransform(); mat->addChild(geode); mat->setNodeMask(0x0); _mats.push_back(mat); parent_group->addChild(mat); } parent_group->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF); } virtual bool handle (const osgGA::GUIEventAdapter &ea, osgGA::GUIActionAdapter &aa, osg::Object *, osg::NodeVisitor *) { switch(ea.getEventType()) { case osgGA::GUIEventAdapter::FRAME: if (_cleanupOnNextFrame) { cleanup(0); _cleanupOnNextFrame = false; } break; case osgGA::GUIEventAdapter::PUSH: case osgGA::GUIEventAdapter::DRAG: case osgGA::GUIEventAdapter::RELEASE: { // is this a multi-touch event? if (!ea.isMultiTouchEvent()) return false; unsigned int j(0); // iterate over all touch-points and update the geometry unsigned num_touch_ended(0); for(osgGA::GUIEventAdapter::TouchData::iterator i = ea.getTouchData()->begin(); i != ea.getTouchData()->end(); ++i, ++j) { const osgGA::GUIEventAdapter::TouchData::TouchPoint& tp = (*i); _mats[j]->setMatrix(osg::Matrix::translate(tp.x, ea.getWindowHeight() - tp.y, 0)); _mats[j]->setNodeMask(0xffff); std::ostringstream ss; ss << "Touch " << tp.id; _texts[j]->setText(ss.str()); switch (tp.phase) { case osgGA::GUIEventAdapter::TOUCH_BEGAN: _drawables[j]->setColor(osg::Vec4(0,1,0,1)); std::cout << "touch began: " << ss.str() << std::endl; break; case osgGA::GUIEventAdapter::TOUCH_MOVED: //std::cout << "touch moved: " << ss.str() << std::endl; _drawables[j]->setColor(osg::Vec4(1,1,1,1)); break; case osgGA::GUIEventAdapter::TOUCH_ENDED: _drawables[j]->setColor(osg::Vec4(1,0,0,1)); std::cout << "touch ended: " << ss.str() << std::endl; ++num_touch_ended; break; case osgGA::GUIEventAdapter::TOUCH_STATIONERY: _drawables[j]->setColor(osg::Vec4(0.8,0.8,0.8,1)); break; default: break; } } // hide unused geometry cleanup(j); //check if all touches ended if ((ea.getTouchData()->getNumTouchPoints() > 0) && (ea.getTouchData()->getNumTouchPoints() == num_touch_ended)) { _cleanupOnNextFrame = true; } // reposition mouse-pointer aa.requestWarpPointer((ea.getWindowX() + ea.getWindowWidth()) / 2.0, (ea.getWindowY() + ea.getWindowHeight()) / 2.0); } break; default: break; } return false; } void cleanup(unsigned int j) { for(unsigned k = j; k < _mats.size(); ++k) { _mats[k]->setNodeMask(0x0); } } std::vector _drawables; std::vector _mats; std::vector _texts; bool _cleanupOnNextFrame; }; // //Called once app has finished launching, create the viewer then realize. Can't call viewer->run as will //block the final inialization of the windowing system // - (void)applicationDidFinishLaunching:(UIApplication *)application { //get the screen size CGRect lFrame = [[UIScreen mainScreen] bounds]; unsigned int w = lFrame.size.width; unsigned int h = lFrame.size.height; //create the viewer _viewer = new osgViewer::Viewer(); /* // If you want full control over the graphics context / window creation, please uncomment this section // create the main window at screen size self._window = [[UIWindow alloc] initWithFrame: lFrame]; //show window [_window makeKeyAndVisible]; //create our graphics context directly so we can pass our own window osg::ref_ptr traits = new osg::GraphicsContext::Traits; // Init the Windata Variable that holds the handle for the Window to display OSG in. osg::ref_ptr windata = new osgViewer::GraphicsWindowIOS::WindowData(_window); // Setup the traits parameters traits->x = 0; traits->y = 0; traits->width = w; traits->height = h; traits->depth = 16; //keep memory down, default is currently 24 traits->windowDecoration = false; traits->doubleBuffer = true; traits->sharedContext = 0; traits->setInheritedWindowPixelFormat = true; traits->samples = 4; traits->sampleBuffers = 1; traits->inheritedWindowData = windata; // Create the Graphics Context osg::ref_ptr graphicsContext = osg::GraphicsContext::createGraphicsContext(traits.get()); // if the context was created then attach to our viewer if(graphicsContext) { _viewer->getCamera()->setGraphicsContext(graphicsContext); _viewer->getCamera()->setViewport(new osg::Viewport(0, 0, traits->width, traits->height)); } */ //create root _root = new osg::MatrixTransform(); //load and attach scene model osg::ref_ptr model = (osgDB::readNodeFile("hog.osg")); if (model) { _root->addChild(model); } else { osg::Geode* geode = new osg::Geode(); osg::ShapeDrawable* drawable = new osg::ShapeDrawable(new osg::Box(osg::Vec3(1,1,1), 1)); geode->addDrawable(drawable); _root->addChild(geode); } osg::Camera* hud_camera = createHUD(w,h); _root->addChild(hud_camera); _viewer->setSceneData(_root.get()); _viewer->setCameraManipulator(new osgGA::MultiTouchTrackballManipulator()); _viewer->addEventHandler(new TestMultiTouchEventHandler(hud_camera)); // sun single-threaded _viewer->setThreadingModel(osgViewer::Viewer::SingleThreaded); _viewer->realize(); // render a frame so the window-manager shows some content and not only an empty + black window _viewer->frame(); // create a display link, which will update our scene on every screen-refresh _displayLink = [application.keyWindow.screen displayLinkWithTarget:self selector:@selector(updateScene)]; [_displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; } // //Timer called function to update our scene and render the viewer // - (void)updateScene { _viewer->frame(); } - (void)applicationWillResignActive:(UIApplication *)application { } - (void)applicationDidBecomeActive:(UIApplication *)application { } -(void)applicationWillTerminate:(UIApplication *)application { if (_displayLink) [_displayLink invalidate]; _displayLink = NULL; _root = NULL; _viewer = NULL; } - (void)dealloc { _root = NULL; _viewer = NULL; [super dealloc]; } @end