Added View::computeIntersection implementation for a node withing a scene graph.

include/osgUtil/LineSegmentIntersector

@@ -33,7 +33,7 @@ class OSGUTIL_EXPORT LineSegmentIntersector : public Intersector
         
         /** Convinience constructor for supporting picking in WINDOW, or PROJECTION coorindates
           * In WINDOW coordinates creates a start value of (x,y,0) and end value of (x,y,1).
-          * In PROJECTION coordinates (clip space cube) creates a start value of (x,y,1) and end value of (x,y,-1).
+          * In PROJECTION coordinates (clip space cube) creates a start value of (x,y,-1) and end value of (x,y,1).
           * In VIEW and MODEL coordinates creates a start value of (x,y,0) and end value of (x,y,1).*/
         LineSegmentIntersector(CoordinateFrame cf, double x, double y);
         

include/osgViewer/Scene

@@ -41,22 +41,12 @@ class OSGVIEWER_EXPORT Scene : public virtual osg::Referenced
 
         osg::FrameStamp* getFrameStamp() { return _frameStamp.get(); }
 
-        void setEventQueue(osgGA::EventQueue* eventQueue) { _eventQueue = eventQueue; }
-        osgGA::EventQueue* getEventQueue() { return _eventQueue.get(); }
-        const osgGA::EventQueue* getEventQueue() const { return _eventQueue.get(); }
-
-        typedef std::list< osg::ref_ptr<osgGA::GUIEventHandler> > EventHandlers;
-        
-        void addEventHandler(osgGA::GUIEventHandler* eventHandler);
-        EventHandlers& getEventHandlers() { return _eventHandlers; }
-        const EventHandlers& getEventHandlers() const { return _eventHandlers; }
-
         void setDatabasePager(osgDB::DatabasePager* dp);
         osgDB::DatabasePager* getDatabasePager() { return _databasePager.get(); }
         const osgDB::DatabasePager* getDatabasePager() const { return _databasePager.get(); }
 
         virtual void frameAdvance();
-        virtual void frameEventTraversal();
+        
         virtual void frameUpdateTraversal();
 
     public:
@@ -72,13 +62,7 @@ class OSGVIEWER_EXPORT Scene : public virtual osg::Referenced
 
         osg::ref_ptr<osgUtil::UpdateVisitor>  _updateVisitor;
 
-        osg::ref_ptr<osgGA::EventQueue>     _eventQueue;
-        osg::ref_ptr<osgGA::EventVisitor>   _eventVisitor;
-
         osg::ref_ptr<osgDB::DatabasePager>  _databasePager;
-
-        EventHandlers                       _eventHandlers;
-    
 };
 
 

include/osgViewer/View

@@ -64,12 +64,8 @@ class OSGVIEWER_EXPORT View : public osg::View, public osgGA::GUIActionAdapter
           * directly on to the computeIntersections method. */
         bool computeIntersections(float x,float y, osgUtil::LineSegmentIntersector::Intersections& intersections,osg::Node::NodeMask traversalMask = 0xffffffff);
         
-        /** Compute intersections between a ray through the specified master cameras window/eye coords and a specified node.
+        /** Compute intersections between a ray through the specified master cameras window/eye coords and a specified nodePath's subgraph. */
-          * Note, when a master cameras has slaves and no viewport itself its coordinate frame will be in clip space i.e. -1,-1 to 1,1,
+        bool computeIntersections(float x,float y, osg::NodePath& nodePath, osgUtil::LineSegmentIntersector::Intersections& intersections,osg::Node::NodeMask traversalMask = 0xffffffff);
-          * while if its has a viewport the coordintates will be relative to its viewport dimensions. 
-          * Mouse events handled by the view will automatically be attached into the master camera window/clip coords so can be passed
-          * directly on to the computeIntersections method. */
-        bool computeIntersections(float x,float y, osg::Node* node, osgUtil::LineSegmentIntersector::Intersections& intersections,osg::Node::NodeMask traversalMask = 0xffffffff);
         
         
         virtual void requestRedraw();
@@ -91,7 +87,6 @@ class OSGVIEWER_EXPORT View : public osg::View, public osgGA::GUIActionAdapter
     
         typedef std::map<osg::ref_ptr<osg::Camera>, osg::ref_ptr<osgUtil::SceneView> > CameraSceneViewMap;
         CameraSceneViewMap _cameraSceneViewMap;
-
 };
 
 }

include/osgViewer/Viewer

@@ -16,6 +16,7 @@
 
 #include <osgViewer/GraphicsWindow>
 #include <osgViewer/View>
+#include <osgGA/EventVisitor>
 
 namespace osgViewer {
 
@@ -134,6 +135,7 @@ class OSGVIEWER_EXPORT Viewer : public osgViewer::View
         
         osg::observer_ptr<osg::Camera>      _cameraWithFocus;
         
+        osg::ref_ptr<osgGA::EventVisitor>   _eventVisitor;
 };
 
 

src/osgUtil/LineSegmentIntersector.cpp

@@ -220,7 +220,7 @@ LineSegmentIntersector::LineSegmentIntersector(CoordinateFrame cf, double x, dou
     switch(cf)
     {
         case WINDOW : _start.set(x,y,0.0); _end.set(x,y,1.0); break;
-        case PROJECTION : _start.set(x,y,1.0); _end.set(x,y,-1.0); break;
+        case PROJECTION : _start.set(x,y,-1.0); _end.set(x,y,1.0); break;
         case VIEW : _start.set(x,y,0.0); _end.set(x,y,1.0); break;
         case MODEL : _start.set(x,y,0.0); _end.set(x,y,1.0); break;
     }

src/osgViewer/Scene.cpp

@@ -12,6 +12,7 @@
 */
 
 #include <osgViewer/Scene>
+#include <osgGA/EventVisitor>
 
 using namespace osgViewer;
 
@@ -64,11 +65,6 @@ void Scene::setDatabasePager(osgDB::DatabasePager* dp)
     _databasePager = dp;
 }
 
-void Scene::addEventHandler(osgGA::GUIEventHandler*)
-{
-    osg::notify(osg::NOTICE)<<"Scene::addEventHandler() not implementated yet."<<std::endl;
-}
-
 void Scene::frameAdvance()
 {
     // double previousTime = _frameStamp->getReferenceTime();
@@ -79,45 +75,6 @@ void Scene::frameAdvance()
     // osg::notify(osg::NOTICE)<<"Frame rate = "<<1.0/(_frameStamp->getReferenceTime()-previousTime)<<std::endl;
 }
 
-void Scene::frameEventTraversal()
-{
-    _eventQueue->frame( _frameStamp->getReferenceTime() );
-
-    osgGA::EventQueue::Events events;
-    _eventQueue->takeEvents(events);
-    
-    if (_eventVisitor.valid())
-    {
-        _eventVisitor->setTraversalNumber(_frameStamp->getFrameNumber());
-    }
-    
-    for(osgGA::EventQueue::Events::iterator itr = events.begin();
-        itr != events.end();
-        ++itr)
-    {
-        osgGA::GUIEventAdapter* event = itr->get();
-    
-        bool handled = false;
-        
-        if (_eventVisitor.valid() && getSceneData())
-        {
-            _eventVisitor->reset();
-            _eventVisitor->addEvent( event );
-            
-            getSceneData()->accept(*_eventVisitor);
-            
-            if (_eventVisitor->getEventHandled())  handled = true;
-        }
-        
-        for(EventHandlers::iterator hitr = _eventHandlers.begin();
-            hitr != _eventHandlers.end() && !handled;
-            ++hitr)
-        {
-//            handled = (*hitr)->handle( *event, *this, 0, 0);
-        }
-    }
-}
-
 void Scene::frameUpdateTraversal()
 {
     if (!getSceneData()) return;

src/osgViewer/View.cpp

@@ -409,11 +409,43 @@ bool View::computeIntersections(float x,float y, osgUtil::LineSegmentIntersector
     }
 }
 
-bool View::computeIntersections(float x,float y, osg::Node* node, osgUtil::LineSegmentIntersector::Intersections& intersections,osg::Node::NodeMask traversalMask)
+bool View::computeIntersections(float x,float y, osg::NodePath& nodePath, osgUtil::LineSegmentIntersector::Intersections& intersections,osg::Node::NodeMask traversalMask)
 {
     if (!_camera.valid()) return false;
     
     osg::notify(osg::NOTICE)<<"View::computeIntersections(x,y,node,intersections) not implemented"<<std::endl;
     
+    osg::Matrix matrix = osg::computeWorldToLocal(nodePath) *  _camera->getViewMatrix() * _camera->getProjectionMatrix();
+    
+    double zNear = -1.0;
+    double zFar = 1.0;
+    if (_camera->getViewport())
+    {
+        matrix.postMult(_camera->getViewport()->computeWindowMatrix());
+        zNear = 0.0;
+        zFar = 1.0;
+    }
+    
+    osg::Matrix inverse;
+    inverse.invert(matrix);
+
+    osg::Vec3d startVertex = osg::Vec3d(x,y,zNear) * inverse;
+    osg::Vec3d endVertex = osg::Vec3d(x,y,zFar) * inverse;
+    
+    osgUtil::LineSegmentIntersector* picker = new osgUtil::LineSegmentIntersector(osgUtil::Intersector::MODEL, startVertex, endVertex);
+    
+    osgUtil::IntersectionVisitor iv(picker);
+    iv.setTraversalMask(traversalMask);
+    nodePath.back()->accept(iv);
+
+    if (picker->containsIntersections())
+    {
+        intersections = picker->getIntersections();
+        return true;
+    }
+    else
+    {
+        intersections.clear();
         return false;
+    }
 }

src/osgViewer/Viewer.cpp

@@ -31,6 +31,8 @@ Viewer::Viewer():
     _threadingModel(ThreadPerContext),
     _numThreadsOnBarrier(0)
 {
+    _eventVisitor = new osgGA::EventVisitor;
+    _eventVisitor->setActionAdapter(this);
 }
 
 Viewer::~Viewer()
@@ -723,37 +725,6 @@ void Viewer::eventTraversal()
         }
     }
     
-#if 0  
-    // pointer coordinate transform
-    for(osgGA::EventQueue::Events::iterator itr = events.begin();
-        itr != events.end();
-        ++itr)
-    {
-        osgGA::GUIEventAdapter* event = itr->get();
-        
-        if (getEventQueue()->getUseFixedMouseInputRange())
-        {
-            event->setInputRange(eventState->getXmin(), eventState->getYmin(), eventState->getXmax(), eventState->getYmax());
-        }
-        
-        switch(event->getEventType())
-        {
-            case(osgGA::GUIEventAdapter::PUSH):
-            case(osgGA::GUIEventAdapter::RELEASE):
-            case(osgGA::GUIEventAdapter::DRAG):
-            case(osgGA::GUIEventAdapter::MOVE):
-                eventState->setX(event->getX());
-                eventState->setY(event->getY());
-                eventState->setButtonMask(event->getButtonMask());
-                // osg::notify(osg::NOTICE)<<"   mouse x = "<<event->getX()<<" y="<<event->getY()<<std::endl;
-                // osg::notify(osg::NOTICE)<<"   mouse Xmin = "<<event->getXmin()<<" Ymin="<<event->getYmin()<<" xMax="<<event->getXmax()<<" Ymax="<<event->getYmax()<<std::endl;
-                break;
-            default:
-                break;
-        }
-    }
-#else
-#endif    
 
     // osg::notify(osg::NOTICE)<<"mouseEventState Xmin = "<<eventState->getXmin()<<" Ymin="<<eventState->getYmin()<<" xMax="<<eventState->getXmax()<<" Ymax="<<eventState->getYmax()<<std::endl;
 
@@ -792,7 +763,7 @@ void Viewer::eventTraversal()
             case(osgGA::GUIEventAdapter::KEYUP):
                 osg::notify(osg::NOTICE)<<"  KEYUP '"<<(char)event->getKey()<<"'"<<std::endl;
                 break;
-*/            case(osgGA::GUIEventAdapter::RESIZE):
+            case(osgGA::GUIEventAdapter::RESIZE):
                 osg::notify(osg::NOTICE)<<"  RESIZE "<<event->getWindowX()<<"/"<<event->getWindowY()<<" x "<<event->getWindowWidth()<<"/"<<event->getWindowHeight() << std::endl;
                 break;
             case(osgGA::GUIEventAdapter::QUIT_APPLICATION):
@@ -861,6 +832,28 @@ void Viewer::eventTraversal()
         }
     }
 
+    if (_eventVisitor.valid())
+    {
+        _eventVisitor->setFrameStamp(_scene->getFrameStamp());
+        _eventVisitor->setTraversalNumber(_scene->getFrameStamp()->getFrameNumber());
+
+        for(osgGA::EventQueue::Events::iterator itr = events.begin();
+            itr != events.end();
+            ++itr)
+        {
+            osgGA::GUIEventAdapter* event = itr->get();
+
+            bool handled = false;
+
+            _eventVisitor->reset();
+            _eventVisitor->addEvent( event );
+
+            getSceneData()->accept(*_eventVisitor);
+
+            if (_eventVisitor->getEventHandled())  handled = true;
+        }
+    }
+
 }
 
 void Viewer::updateTraversal()