Added convinence methods to osgProducer::Viewer:
/** compute, from normalized mouse coords, for sepecified Camera, the pixel coords relative to that Camera's RenderSurface.*/
bool computePixelCoords(float x,float y,unsigned int cameraNum,float& pixel_x,float& pixel_y);
/** compute, from normalized mouse coords, for sepecified Camera, the near and far points in worlds coords.*/
bool computeNearFar(float x,float y,unsigned int cameraNum,osg::Vec3& near, osg::Vec3& far);
/** compute, from normalized mouse coords, for sepecified Camera, intersections with the scene.*/
bool computeIntersections(float x,float y,unsigned int cameraNum,osgUtil::IntersectVisitor::HitList& hits);
/** compute, from normalized mouse coords, for all Cameras, intersections with the scene.*/
bool computeIntersections(float x,float y,osgUtil::IntersectVisitor::HitList& hits);
This commit is contained in:
Robert Osfield
parent
48cb15015f
commit
904aceec22
@ -28,41 +28,6 @@
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#include <osgText/Text>
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#include <osgUtil/PickVisitor>
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static Producer::CameraConfig *BuildConfig(void)
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{
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Producer::RenderSurface *rs1 = new Producer::RenderSurface;
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rs1->setScreenNum(0);
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//rs1->useBorder(false);
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rs1->setWindowRect(0,0,640,480);
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Producer::Camera *camera1 = new Producer::Camera;
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camera1->setRenderSurface(rs1);
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camera1->setOffset( 1.0, 0.0 );
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Producer::RenderSurface *rs2 = new Producer::RenderSurface;
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rs2->setScreenNum(0);
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//rs2->useBorder(false);
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rs2->setWindowRect(640,0,640,480);
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Producer::Camera *camera2 = new Producer::Camera;
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camera2->setRenderSurface(rs2);
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camera2->setOffset( -1.0, 0.0 );
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Producer::InputArea *ia = new Producer::InputArea;
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ia->addInputRectangle( rs1, Producer::InputRectangle(0.0,0.5,0.0,1.0));
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ia->addInputRectangle( rs2, Producer::InputRectangle(0.5,1.0,0.0,1.0));
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// ia->addInputRectangle( rs1, Producer::InputRectangle(-1.0,0.0,-1.0,1.0));
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// ia->addInputRectangle( rs2, Producer::InputRectangle(0.0,1.0,-1.0,1.0));
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Producer::CameraConfig *cfg = new Producer::CameraConfig;
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cfg->addCamera("Camera 1",camera1);
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cfg->addCamera("Camera 2", camera2);
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cfg->setInputArea(ia);
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return cfg;
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}
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// class to handle events with a pick
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class PickHandler : public osgGA::GUIEventHandler {
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@ -106,104 +71,33 @@ bool PickHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapte
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void PickHandler::pick(const osgGA::GUIEventAdapter& ea)
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{
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// OK here is the interesting bit - How To Pick a Geode
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// including geodes in a HUD under a Projection Matrix
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osg::Node *scene=_viewer->getSceneData();//main node of the scene.
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if (scene)
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osgUtil::IntersectVisitor::HitList hlist;
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std::string gdlist="";
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if (_viewer->computeIntersections(ea.getX(),ea.getY(),hlist))
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{
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float x=ea.getX();
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float y=ea.getY();
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Producer::KeyboardMouse* km = _viewer->getKeyboardMouse();
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std::string gdlist="";
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for(unsigned int i=0;i<_viewer->getNumberOfCameras();++i)
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for(osgUtil::IntersectVisitor::HitList::iterator hitr=hlist.begin();
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hitr!=hlist.end();
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++hitr)
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{
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Producer::Camera* cmm=_viewer->getCamera(i);
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Producer::RenderSurface* rs = cmm->getRenderSurface();
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//std::cout << "checking camara "<<i<<std::endl;
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float pixel_x,pixel_y;
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if (km->computePixelCoords(x,y,rs,pixel_x,pixel_y))
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//osg::Vec3 ip = hitr->getLocalIntersectPoint();
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//osg::Vec3 in = hitr->getLocalIntersectNormal();
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osg::Geode* geode = hitr->_geode.get();
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// the geodes are identified by name.
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if (geode)
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{
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//std::cout << " compute pixel coords "<<pixel_x<<" "<<pixel_y<<std::endl;
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int pr_wx, pr_wy;
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unsigned int pr_width, pr_height;
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cmm->getProjectionRect( pr_wx, pr_wy, pr_width, pr_height );
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int rs_wx, rs_wy;
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unsigned int rs_width, rs_height;
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rs->getWindowRect( rs_wx, rs_wy, rs_width, rs_height );
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pr_wx += rs_wx;
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pr_wy += rs_wy;
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//std::cout << " wx = "<<pr_wx<<" wy = "<<pr_wy<<" width="<<pr_width<<" height="<<pr_height<<std::endl;
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if (pixel_x<(float)pr_wx) break;
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if (pixel_x>(float)(pr_wx+pr_width)) break;
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if (pixel_y<(float)pr_wy) break;
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if (pixel_y>(float)(pr_wy+pr_height)) break;
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float rx = 2.0f*(pixel_x - (float)pr_wx)/(float)pr_width-1.0f;
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float ry = 2.0f*(pixel_y - (float)pr_wy)/(float)pr_height-1.0f;
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//std::cout << " rx "<<rx<<" "<<ry<<std::endl;
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osgProducer::OsgSceneHandler* sh = dynamic_cast<osgProducer::OsgSceneHandler*>(cmm->getSceneHandler());
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osg::Matrix vum;
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if (sh!=0 && sh->getModelViewMatrix()!=0 && sh->getProjectionMatrix()!=0)
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if (!geode->getName().empty())
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{
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vum.set((*(sh->getModelViewMatrix())) *
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(*(sh->getProjectionMatrix())));
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gdlist=gdlist+" "+geode->getName();
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}
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else
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{
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vum.set(osg::Matrix(cmm->getViewMatrix()) *
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osg::Matrix(cmm->getProjectionMatrix())/* *
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osg::Matrix::translate(1.0f,1.0f,1.0f) *
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osg::Matrix::scale(0.5f,0.5f,0.5f)*/);
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gdlist=gdlist+" geode";
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}
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osgUtil::PickVisitor iv;
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osgUtil::IntersectVisitor::HitList& hlist=iv.getHits(scene, vum, rx,ry);
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if (iv.hits())
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{
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for(osgUtil::IntersectVisitor::HitList::iterator hitr=hlist.begin();
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hitr!=hlist.end();
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++hitr)
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{
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//osg::Vec3 ip = hitr->getLocalIntersectPoint();
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//osg::Vec3 in = hitr->getLocalIntersectNormal();
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osg::Geode* geode = hitr->_geode.get();
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// the geodes are identified by name.
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if (geode)
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{
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if (!geode->getName().empty())
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{
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gdlist=gdlist+" "+geode->getName();
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}
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else
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{
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gdlist=gdlist+" geode";
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}
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}
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}
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}
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}
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}
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}
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setLabel(gdlist);
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}
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setLabel(gdlist);
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}
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osg::Node* createHUD(osgText::Text* updateText)
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@ -311,8 +205,7 @@ int main( int argc, char **argv )
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// construct the viewer.
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//osgProducer::Viewer viewer(arguments);
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osgProducer::Viewer viewer(BuildConfig());
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osgProducer::Viewer viewer(arguments);
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// set up the value with sensible default event handlers.
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viewer.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);
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@ -20,6 +20,8 @@
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#include <osg/ApplicationUsage>
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#include <osg/AnimationPath>
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#include <osgUtil/IntersectVisitor>
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#include <osgGA/GUIActionAdapter>
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#include <osgGA/GUIEventHandler>
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#include <osgGA/KeySwitchCameraManipulator>
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@ -92,14 +94,27 @@ class OSGPRODUCER_EXPORT Viewer : public OsgCameraGroup, public osgGA::GUIAction
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virtual void requestContinuousUpdate(bool) {}
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virtual void requestWarpPointer(float x,float y);
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Producer::KeyboardMouse* getKeyboardMouse() { return _kbmcb==0?0:_kbmcb->getKeyboardMouse(); }
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const Producer::KeyboardMouse* getKeyboardMouse() const { return _kbmcb==0?0:_kbmcb->getKeyboardMouse(); }
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/** compute, from normalized mouse coords, for sepecified Camera, the pixel coords relative to that Camera's RenderSurface.*/
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bool computePixelCoords(float x,float y,unsigned int cameraNum,float& pixel_x,float& pixel_y);
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/** compute, from normalized mouse coords, for sepecified Camera, the near and far points in worlds coords.*/
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bool computeNearFar(float x,float y,unsigned int cameraNum,osg::Vec3& near, osg::Vec3& far);
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KeyboardMouseCallback* getKeyboardMouseCallback() { return _kbmcb; }
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/** compute, from normalized mouse coords, for sepecified Camera, intersections with the scene.*/
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bool computeIntersections(float x,float y,unsigned int cameraNum,osgUtil::IntersectVisitor::HitList& hits);
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/** compute, from normalized mouse coords, for all Cameras, intersections with the scene.*/
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bool computeIntersections(float x,float y,osgUtil::IntersectVisitor::HitList& hits);
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Producer::KeyboardMouse* getKeyboardMouse() { return _kbmcb==0?0:_kbmcb->getKeyboardMouse(); }
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const Producer::KeyboardMouse* getKeyboardMouse() const { return _kbmcb==0?0:_kbmcb->getKeyboardMouse(); }
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KeyboardMouseCallback* getKeyboardMouseCallback() { return _kbmcb; }
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const KeyboardMouseCallback* getKeyboardMouseCallback() const { return _kbmcb; }
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typedef std::list< osg::ref_ptr<osgGA::GUIEventHandler> > EventHandlerList;
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EventHandlerList& getEventHandlerList() { return _eventHandlerList; }
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@ -10,6 +10,9 @@ osgviewer cow.osg
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echo osgkeyboard
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osgkeyboard
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echo osgpick fountain.osg
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osgpick fountain.osg
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echo osgwindows glider.osg
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osgwindows glider.osg
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@ -2,6 +2,7 @@
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#include <osg/ApplicationUsage>
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#include <osgUtil/UpdateVisitor>
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#include <osgUtil/PickVisitor>
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#include <osgDB/Registry>
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@ -299,6 +300,116 @@ void Viewer::frame()
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OsgCameraGroup::frame();
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}
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bool Viewer::computePixelCoords(float x,float y,unsigned int cameraNum,float& pixel_x,float& pixel_y)
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{
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Producer::KeyboardMouse* km = getKeyboardMouse();
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if (!km) return false;
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if (cameraNum>=getNumberOfCameras()) return false;
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Producer::Camera* camera=getCamera(cameraNum);
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Producer::RenderSurface* rs = camera->getRenderSurface();
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//std::cout << "checking camara "<<i<<std::endl;
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if (km->computePixelCoords(x,y,rs,pixel_x,pixel_y))
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{
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//std::cout << " compute pixel coords "<<pixel_x<<" "<<pixel_y<<std::endl;
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int pr_wx, pr_wy;
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unsigned int pr_width, pr_height;
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camera->getProjectionRect( pr_wx, pr_wy, pr_width, pr_height );
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int rs_wx, rs_wy;
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unsigned int rs_width, rs_height;
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rs->getWindowRect( rs_wx, rs_wy, rs_width, rs_height );
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pixel_x -= (float)rs_wx;
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pixel_y -= (float)rs_wy;
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//std::cout << " wx = "<<pr_wx<<" wy = "<<pr_wy<<" width="<<pr_width<<" height="<<pr_height<<std::endl;
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if (pixel_x<(float)pr_wx) return false;
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if (pixel_x>(float)(pr_wx+pr_width)) return false;
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if (pixel_y<(float)pr_wy) return false;
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if (pixel_y>(float)(pr_wy+pr_height)) return false;
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return true;
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}
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return false;
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}
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bool Viewer::computeNearFar(float x,float y,unsigned int cameraNum,osg::Vec3& near, osg::Vec3& far)
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{
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if (cameraNum>=getSceneHandlerList().size()) return false;
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OsgSceneHandler* scenehandler = getSceneHandlerList()[cameraNum].get();
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float pixel_x,pixel_y;
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if (computePixelCoords(x,y,cameraNum,pixel_x,pixel_y))
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{
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return scenehandler->projectWindowXYIntoObject(pixel_x,pixel_y,near,far);
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}
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return false;
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}
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bool Viewer::computeIntersections(float x,float y,unsigned int cameraNum,osgUtil::IntersectVisitor::HitList& hits)
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{
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float pixel_x,pixel_y;
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if (computePixelCoords(x,y,cameraNum,pixel_x,pixel_y))
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{
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Producer::Camera* camera=getCamera(cameraNum);
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int pr_wx, pr_wy;
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unsigned int pr_width, pr_height;
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camera->getProjectionRect( pr_wx, pr_wy, pr_width, pr_height );
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// convert into clip coords.
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float rx = 2.0f*(pixel_x - (float)pr_wx)/(float)pr_width-1.0f;
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float ry = 2.0f*(pixel_y - (float)pr_wy)/(float)pr_height-1.0f;
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//std::cout << " rx "<<rx<<" "<<ry<<std::endl;
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osgProducer::OsgSceneHandler* sh = dynamic_cast<osgProducer::OsgSceneHandler*>(camera->getSceneHandler());
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osg::Matrix vum;
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if (sh!=0 && sh->getModelViewMatrix()!=0 && sh->getProjectionMatrix()!=0)
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{
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vum.set((*(sh->getModelViewMatrix())) *
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(*(sh->getProjectionMatrix())));
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}
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else
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{
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vum.set(osg::Matrix(camera->getViewMatrix()) *
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osg::Matrix(camera->getProjectionMatrix()));
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}
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osgUtil::PickVisitor iv;
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osgUtil::IntersectVisitor::HitList localHits;
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localHits = iv.getHits(getSceneData(), vum, rx,ry);
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if (localHits.empty()) return false;
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hits.insert(hits.begin(),localHits.begin(),localHits.end());
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return true;
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}
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return false;
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}
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bool Viewer::computeIntersections(float x,float y,osgUtil::IntersectVisitor::HitList& hits)
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{
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bool hitFound = false;
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osgUtil::IntersectVisitor::HitList hlist;
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for(unsigned int i=0;i<getNumberOfCameras();++i)
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{
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if (computeIntersections(x,y,i,hits)) hitFound = true;
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}
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return hitFound;
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}
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void Viewer::selectCameraManipulator(unsigned int no)
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{
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@ -33,9 +33,10 @@ public:
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image->readPixels(x,y,width,height,
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GL_RGB,GL_UNSIGNED_BYTE);
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osgDB::writeImageFile(*image,_filename);
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osg::notify(osg::NOTICE) << "Saved screen image to `"<<_filename<<"`"<< std::endl;
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if (osgDB::writeImageFile(*image,_filename))
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{
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osg::notify(osg::NOTICE) << "Saved screen image to `"<<_filename<<"`"<< std::endl;
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}
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_snapImageOnNextFrame = false;
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}
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@ -802,8 +803,10 @@ bool ViewerEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActio
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osg::Node* node = _cg->getSceneData();
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if (node)
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{
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std::cout<<"writing file "<<_writeNodeFileName<<std::endl;
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osgDB::writeNodeFile(*node,_writeNodeFileName.c_str());
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if (osgDB::writeNodeFile(*node,_writeNodeFileName.c_str()))
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{
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std::cout<<"writen nodes to file "<<_writeNodeFileName<<std::endl;
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}
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}
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return true;
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@ -107,7 +107,8 @@ osgUtil::IntersectVisitor::HitList& PickVisitor::getHits(osg::Node *scene,
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void PickVisitor::apply(osg::Projection& pr)
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{ // stack the intersect rays, transform to new projection, traverse
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// Assumes that the Projection is an absolute projection
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osg::Matrix mt=osg::Matrix::inverse(pr.getMatrix());
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osg::Matrix mt;
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mt.invert(pr.getMatrix());
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osg::Vec3 npt=osg::Vec3(xp,yp,1.0f) * mt, farpt=osg::Vec3(xp,yp,-1.0f) * mt;
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// traversing the nodes children, using the projection direction
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