X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FMain%2Frenderer.cxx;h=d1fa367cfb09434aa53cd840046a527d3bd49b42;hb=38226af24ec01e8f0a20d7fd73ef838a69f6ef25;hp=26762df32d20de070561e3f484576d443307cede;hpb=4f4434787fb40e02a35b401171f2a7370e0d5463;p=flightgear.git

diff --git a/src/Main/renderer.cxx b/src/Main/renderer.cxx
index 26762df32..d1fa367cf 100644
--- a/src/Main/renderer.cxx
+++ b/src/Main/renderer.cxx
@@ -29,11 +29,18 @@
 
 #include <simgear/compiler.h>
 
+#include <algorithm>
+#include <iostream>
+#include <map>
+#include <vector>
+#include <typeinfo>
+
 #include <osg/ref_ptr>
 #include <osg/AlphaFunc>
 #include <osg/BlendFunc>
 #include <osg/Camera>
 #include <osg/CullFace>
+#include <osg/CullStack>
 #include <osg/Depth>
 #include <osg/Fog>
 #include <osg/Group>
@@ -47,6 +54,7 @@
 #include <osg/Notify>
 #include <osg/PolygonMode>
 #include <osg/PolygonOffset>
+#include <osg/Program>
 #include <osg/Version>
 #include <osg/TexEnv>
 
@@ -56,15 +64,16 @@
 #include <osgDB/WriteFile>
 
 #include <simgear/math/SGMath.hxx>
-#include <simgear/screen/extensions.hxx>
 #include <simgear/scene/material/matlib.hxx>
 #include <simgear/scene/model/animation.hxx>
 #include <simgear/scene/model/placement.hxx>
 #include <simgear/scene/sky/sky.hxx>
 #include <simgear/scene/util/SGUpdateVisitor.hxx>
 #include <simgear/scene/util/RenderConstants.hxx>
+#include <simgear/scene/util/SGSceneUserData.hxx>
 #include <simgear/scene/tgdb/GroundLightManager.hxx>
 #include <simgear/scene/tgdb/pt_lights.hxx>
+#include <simgear/structure/OSGUtils.hxx>
 #include <simgear/props/props.hxx>
 #include <simgear/timing/sg_time.hxx>
 #include <simgear/ephemeris/ephemeris.hxx>
@@ -77,32 +86,23 @@
 
 #include <Time/light.hxx>
 #include <Time/light.hxx>
-#include <Aircraft/aircraft.hxx>
 #include <Cockpit/panel.hxx>
-#include <Cockpit/cockpit.hxx>
-#include <Cockpit/hud.hxx>
 #include <Model/panelnode.hxx>
 #include <Model/modelmgr.hxx>
 #include <Model/acmodel.hxx>
 #include <Scenery/scenery.hxx>
 #include <Scenery/redout.hxx>
-#include <Scenery/tilemgr.hxx>
 #include <GUI/new_gui.hxx>
-#include <Instrumentation/instrument_mgr.hxx>
 #include <Instrumentation/HUD/HUD.hxx>
 #include <Environment/precipitation_mgr.hxx>
 
-#include <Include/general.hxx>
 #include "splash.hxx"
 #include "renderer.hxx"
 #include "main.hxx"
 #include "CameraGroup.hxx"
 #include "FGEventHandler.hxx"
-
-// XXX Make this go away when OSG 2.2 is released.
-#if (FG_OSG_VERSION >= 21004)
-#define UPDATE_VISITOR_IN_VIEWER 1
-#endif
+#include <Main/viewer.hxx>
+#include <Main/viewmgr.hxx>
 
 using namespace osg;
 using namespace simgear;
@@ -140,6 +140,7 @@ public:
   {
     // Dynamic stuff, do not store geometry
     setUseDisplayList(false);
+    setDataVariance(Object::DYNAMIC);
 
     osg::StateSet* stateSet = getOrCreateStateSet();
     stateSet->setRenderBinDetails(1001, "RenderBin");
@@ -185,6 +186,7 @@ public:
   {
     // Dynamic stuff, do not store geometry
     setUseDisplayList(false);
+    setDataVariance(Object::DYNAMIC);
 
     osg::StateSet* stateSet = getOrCreateStateSet();
     stateSet->setRenderBinDetails(1000, "RenderBin");
@@ -209,10 +211,7 @@ public:
     glPushAttrib(GL_ALL_ATTRIB_BITS);
     glPushClientAttrib(~0u);
 
-    fgCockpitUpdate(&state);
-
-    FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
-    HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
+    HUD *hud = static_cast<HUD*>(globals->get_subsystem("hud"));
     hud->draw(state);
 
     // update the panel subsystem
@@ -235,6 +234,18 @@ private:
 
 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 public:
+  
+  /**
+   * @param isSun true if the light is the actual sun i.e., for
+   * illuminating the moon.
+   */
+  FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
+  FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
+                              const CopyOp& op)
+    : NodeCallback(nc, op), _isSun(nc._isSun)
+  {}
+  META_Object(flightgear,FGLightSourceUpdateCallback);
+  
   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
   {
     assert(dynamic_cast<osg::LightSource*>(node));
@@ -242,21 +253,22 @@ public:
     osg::Light* light = lightSource->getLight();
     
     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
-    light->setAmbient(l->scene_ambient().osg());
-    light->setDiffuse(l->scene_diffuse().osg());
-    light->setSpecular(l->scene_specular().osg());
-    SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
-    light->setPosition(position.osg());
-    SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
-    light->setDirection(direction.osg());
-    light->setSpotExponent(0);
-    light->setSpotCutoff(180);
-    light->setConstantAttenuation(1);
-    light->setLinearAttenuation(0);
-    light->setQuadraticAttenuation(0);
+    if (_isSun) {
+      light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
+      light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
+      light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
+    } else {
+      light->setAmbient(toOsg(l->scene_ambient()));
+      light->setDiffuse(toOsg(l->scene_diffuse()));
+      light->setSpecular(toOsg(l->scene_specular()));
+    }
+    osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
+    light->setPosition(position);
 
     traverse(node, nv);
   }
+private:
+  const bool _isSun;
 };
 
 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
@@ -296,7 +308,7 @@ public:
 
 #if 0
     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
-    lightModel->setAmbientIntensity(l->scene_ambient().osg());
+    lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 #else
     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 #endif
@@ -339,7 +351,7 @@ public:
     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
     osg::Fog* fog = static_cast<osg::Fog*>(sa);
     fog->setMode(osg::Fog::EXP2);
-    fog->setColor(updateVisitor->getFogColor().osg());
+    fog->setColor(toOsg(updateVisitor->getFogColor()));
     fog->setDensity(updateVisitor->getFogExp2Density());
   }
 };
@@ -398,12 +410,7 @@ FGRenderer::splashinit( void ) {
     // Scene doesn't seem to pass the frame stamp to the update
     // visitor automatically.
     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
-#ifdef UPDATE_VISITOR_IN_VIEWER
     viewer->setUpdateVisitor(mUpdateVisitor.get());
-#else
-    osgViewer::Scene* scene = viewer->getScene();
-    scene->setUpdateVisitor(mUpdateVisitor.get());
-#endif
 }
 
 void
@@ -474,16 +481,39 @@ FGRenderer::init( void )
     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 
     // need to update the light on every frame
-    osg::LightSource* lightSource = new osg::LightSource;
-    lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
+    // OSG LightSource objects are rather confusing. OSG only supports
+    // the 10 lights specified by OpenGL itself; if more than one
+    // LightSource in the scene graph have the same light number, it's
+    // indeterminate which values will be used to render geometry that
+    // has that light number enabled. Also, adding children to a
+    // LightSource is just a shortcut for setting up a state set that
+    // has the corresponding OpenGL light enabled: a LightSource will
+    // affect geometry anywhere in the scene graph that has its light
+    // number enabled in a state set. 
+    LightSource* lightSource = new LightSource;
+    lightSource->getLight()->setDataVariance(Object::DYNAMIC);
     // relative because of CameraView being just a clever transform node
     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
-    
-    lightSource->addChild(sceneGroup);
-    lightSource->addChild(thesky->getPreRoot());
-    mRoot->addChild(lightSource);
-
+    lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
+    mRealRoot->addChild(lightSource);
+    // we need a white diffuse light for the phase of the moon
+    osg::LightSource* sunLight = new osg::LightSource;
+    sunLight->getLight()->setDataVariance(Object::DYNAMIC);
+    sunLight->getLight()->setLightNum(1);
+    sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
+    sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
+    sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
+    // Hang a StateSet above the sky subgraph in order to turn off
+    // light 0
+    Group* skyGroup = new Group;
+    StateSet* skySS = skyGroup->getOrCreateStateSet();
+    skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
+    skyGroup->addChild(thesky->getPreRoot());
+    sunLight->addChild(skyGroup);
+    mRoot->addChild(sceneGroup);
+    mRoot->addChild(sunLight);
+    // Clouds are added to the scene graph later
     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
@@ -518,24 +548,27 @@ FGRenderer::init( void )
     sw->setUpdateCallback(new FGScenerySwitchCallback);
     sw->addChild(mRoot.get());
     mRealRoot->addChild(sw);
+    // The clouds are attached directly to the scene graph root
+    // because, in theory, they don't want the same default state set
+    // as the rest of the scene. This may not be true in practice.
     mRealRoot->addChild(thesky->getCloudRoot());
     mRealRoot->addChild(FGCreateRedoutNode());
+    // Attach empty program to the scene root so that shader programs
+    // don't leak into state sets (effects) that shouldn't have one.
+    stateSet = mRealRoot->getOrCreateStateSet();
+    stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
 }
 
 
 // Update all Visuals (redraws anything graphics related)
 void
 FGRenderer::update( bool refresh_camera_settings ) {
-    bool scenery_loaded = fgGetBool("sim/sceneryloaded")
+    bool scenery_loaded = fgGetBool("sim/sceneryloaded", false)
                           || fgGetBool("sim/sceneryloaded-override");
     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
-    if ( idle_state < 1000 || !scenery_loaded ) {
-        fgSetDouble("/sim/startup/splash-alpha", 1.0);
-
-        // Keep resetting sim time while the sim is initializing
-        // the splash screen is now in the scenegraph
-        globals->set_sim_time_sec( 0.0 );
-        return;
+    if (!scenery_loaded) {
+      fgSetDouble("/sim/startup/splash-alpha", 1.0);
+      return;
     }
 
     // Fade out the splash screen over the first three seconds.
@@ -551,9 +584,6 @@ FGRenderer::update( bool refresh_camera_settings ) {
     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
                                   distance_attenuation );
 
-    static const SGPropertyNode *groundlevel_nearplane
-        = fgGetNode("/sim/current-view/ground-level-nearplane-m");
-
     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 
     // update fog params
@@ -583,20 +613,19 @@ FGRenderer::update( bool refresh_camera_settings ) {
 	
         if ( fgGetBool("/sim/rendering/textures") ) {
             SGVec4f clearColor(l->adj_fog_color());
-            camera->setClearColor(clearColor.osg());
+            camera->setClearColor(toOsg(clearColor));
         }
     } else {
         SGVec4f clearColor(l->sky_color());
-        camera->setClearColor(clearColor.osg());
+        camera->setClearColor(toOsg(clearColor));
     }
 
     // update fog params if visibility has changed
     double visibility_meters = fgGetDouble("/environment/visibility-m");
     thesky->set_visibility(visibility_meters);
 
-    thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
-                        ( global_multi_loop * fgGetInt("/sim/speed-up") )
-                        / (double)fgGetInt("/sim/model-hz") );
+    double altitude_m = fgGetDouble("/position/altitude-ft") * SG_FEET_TO_METER;
+    thesky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
 
     // update the sky dome
     if ( skyblend ) {
@@ -621,79 +650,29 @@ FGRenderer::update( bool refresh_camera_settings ) {
            sun_horiz_eff = moon_horiz_eff = 1.0;
         }
 
-        static SGSkyState sstate;
-
-        sstate.view_pos  = toVec3f(current__view->get_view_pos());
-        sstate.zero_elev = toVec3f(current__view->get_zero_elev());
-        sstate.view_up   = current__view->get_world_up();
-        sstate.lon       = current__view->getLongitude_deg()
-                            * SGD_DEGREES_TO_RADIANS;
-        sstate.lat       = current__view->getLatitude_deg()
-                            * SGD_DEGREES_TO_RADIANS;
-        sstate.alt       = current__view->getAltitudeASL_ft()
-                            * SG_FEET_TO_METER;
+        SGSkyState sstate;
+        sstate.pos       = current__view->getViewPosition();
+        sstate.pos_geod  = current__view->getPosition();
+        sstate.ori       = current__view->getViewOrientation();
         sstate.spin      = l->get_sun_rotation();
         sstate.gst       = globals->get_time_params()->getGst();
-        sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
-        sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
-        sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
-        sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
         sstate.moon_dist = 40000.0 * moon_horiz_eff;
         sstate.sun_angle = l->get_sun_angle();
 
-
-        /*
-         SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
-         << l->sky_color()[0] << " "
-         << l->sky_color()[1] << " "
-         << l->sky_color()[2] << " "
-         << l->sky_color()[3] );
-        SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
-         << l->fog_color()[0] << " "
-         << l->fog_color()[1] << " "
-         << l->fog_color()[2] << " "
-         << l->fog_color()[3] );
-        SG_LOG( SG_GENERAL, SG_BULK,
-                "    sun_angle = " << l->sun_angle
-         << "    moon_angle = " << l->moon_angle );
-        */
-
-        static SGSkyColor scolor;
-
+        SGSkyColor scolor;
         scolor.sky_color   = SGVec3f(l->sky_color().data());
+        scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
         scolor.cloud_color = SGVec3f(l->cloud_color().data());
         scolor.sun_angle   = l->get_sun_angle();
         scolor.moon_angle  = l->get_moon_angle();
-        scolor.nplanets    = globals->get_ephem()->getNumPlanets();
-        scolor.nstars      = globals->get_ephem()->getNumStars();
-        scolor.planet_data = globals->get_ephem()->getPlanets();
-        scolor.star_data   = globals->get_ephem()->getStars();
-
-        thesky->reposition( sstate, delta_time_sec );
-        thesky->repaint( scolor );
-
-        /*
-        SG_LOG( SG_GENERAL, SG_BULK,
-                "thesky->reposition( view_pos = " << view_pos[0] << " "
-         << view_pos[1] << " " << view_pos[2] );
-        SG_LOG( SG_GENERAL, SG_BULK,
-                "    zero_elev = " << zero_elev[0] << " "
-         << zero_elev[1] << " " << zero_elev[2]
-         << " lon = " << cur_fdm_state->get_Longitude()
-         << " lat = " << cur_fdm_state->get_Latitude() );
-        SG_LOG( SG_GENERAL, SG_BULK,
-                "    sun_rot = " << l->get_sun_rotation
-         << " gst = " << SGTime::cur_time_params->getGst() );
-        SG_LOG( SG_GENERAL, SG_BULK,
-             "    sun ra = " << globals->get_ephem()->getSunRightAscension()
-          << " sun dec = " << globals->get_ephem()->getSunDeclination()
-          << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
-          << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
-        */
-
-        //OSGFIXME
+  
+        double delta_time_sec = fgGetDouble("/sim/time/delta-sec");
+        thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
+        thesky->repaint( scolor, *globals->get_ephem() );
+
+            //OSGFIXME
 //         shadows->setupShadows(
 //           current__view->getLongitude_deg(),
 //           current__view->getLatitude_deg(),
@@ -777,21 +756,10 @@ FGRenderer::resize( int width, int height ) {
     }
 }
 
-void FGRenderer::setCameraParameters(float vfov, float aspectRatio,
-                                     float zNear, float zFar)
-{
-    zNear = .1;
-    osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
-    viewer->getCamera()->setProjectionMatrixAsPerspective(vfov,
-                                                          1.0f / aspectRatio,
-                                                          zNear, zFar);
-    
-}
 bool
 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
                  const osgGA::GUIEventAdapter* ea)
 {
-    osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
     // wipe out the return ...
     pickList.clear();
     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
@@ -814,8 +782,8 @@ FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
                 if (!pickCallback)
                     continue;
                 SGSceneryPick sceneryPick;
-                sceneryPick.info.local = SGVec3d(hit->getLocalIntersectPoint());
-                sceneryPick.info.wgs84 = SGVec3d(hit->getWorldIntersectPoint());
+                sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
+                sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
                 sceneryPick.callback = pickCallback;
                 pickList.push_back(sceneryPick);
             }
@@ -861,5 +829,207 @@ fgDumpNodeToFile(osg::Node* node, const char* filename)
 {
     return osgDB::writeNodeFile(*node, filename);
 }
+
+namespace flightgear
+{
+using namespace osg;
+
+class VisibleSceneInfoVistor : public NodeVisitor, CullStack
+{
+public:
+    VisibleSceneInfoVistor()
+        : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
+    {
+        setCullingMode(CullSettings::SMALL_FEATURE_CULLING
+                       | CullSettings::VIEW_FRUSTUM_CULLING);
+        setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
+    }
+
+    VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
+    {
+    }
+
+    META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
+
+    typedef std::map<const std::string,int> InfoMap;
+
+    void getNodeInfo(Node* node)
+    {
+        const char* typeName = typeid(*node).name();
+        classInfo[typeName]++;
+        const std::string& nodeName = node->getName();
+        if (!nodeName.empty())
+            nodeInfo[nodeName]++;
+    }
+
+    void dumpInfo()
+    {
+        using namespace std;
+        typedef vector<InfoMap::iterator> FreqVector;
+        cout << "class info:\n";
+        FreqVector classes;
+        for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
+             itr != end;
+             ++itr)
+            classes.push_back(itr);
+        sort(classes.begin(), classes.end(), freqComp);
+        for (FreqVector::iterator itr = classes.begin(), end = classes.end();
+             itr != end;
+             ++itr) {
+            cout << (*itr)->first << " " << (*itr)->second << "\n";
+        }
+        cout << "\nnode info:\n";
+        FreqVector nodes;
+        for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
+             itr != end;
+             ++itr)
+            nodes.push_back(itr);
+
+        sort (nodes.begin(), nodes.end(), freqComp);
+        for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
+             itr != end;
+             ++itr) {
+            cout << (*itr)->first << " " << (*itr)->second << "\n";
+        }
+        cout << endl;
+    }
+    
+    void doTraversal(Camera* camera, Node* root, Viewport* viewport)
+    {
+        ref_ptr<RefMatrix> projection
+            = createOrReuseMatrix(camera->getProjectionMatrix());
+        ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
+        if (!viewport)
+            viewport = camera->getViewport();
+        if (viewport)
+            pushViewport(viewport);
+        pushProjectionMatrix(projection.get());
+        pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
+        root->accept(*this);
+        popModelViewMatrix();
+        popProjectionMatrix();
+        if (viewport)
+            popViewport();
+        dumpInfo();
+    }
+
+    void apply(Node& node)
+    {
+        if (isCulled(node))
+            return;
+        pushCurrentMask();
+        getNodeInfo(&node);
+        traverse(node);
+        popCurrentMask();
+    }
+    void apply(Group& node)
+    {
+        if (isCulled(node))
+            return;
+        pushCurrentMask();
+        getNodeInfo(&node);
+        traverse(node);
+        popCurrentMask();
+    }
+
+    void apply(Transform& node)
+    {
+        if (isCulled(node))
+            return;
+        pushCurrentMask();
+        ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
+        node.computeLocalToWorldMatrix(*matrix,this);
+        pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
+        getNodeInfo(&node);
+        traverse(node);
+        popModelViewMatrix();
+        popCurrentMask();
+    }
+
+    void apply(Camera& camera)
+    {
+        // Save current cull settings
+        CullSettings saved_cull_settings(*this);
+
+        // set cull settings from this Camera
+        setCullSettings(camera);
+        // inherit the settings from above
+        inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
+
+        // set the cull mask.
+        unsigned int savedTraversalMask = getTraversalMask();
+        bool mustSetCullMask = (camera.getInheritanceMask()
+                                & osg::CullSettings::CULL_MASK) == 0;
+        if (mustSetCullMask)
+            setTraversalMask(camera.getCullMask());
+
+        osg::RefMatrix* projection = 0;
+        osg::RefMatrix* modelview = 0;
+
+        if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
+            if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
+                projection = createOrReuseMatrix(*getProjectionMatrix()
+                                                 *camera.getProjectionMatrix());
+                modelview = createOrReuseMatrix(*getModelViewMatrix()
+                                                * camera.getViewMatrix());
+            }
+            else {              // pre multiply 
+                projection = createOrReuseMatrix(camera.getProjectionMatrix()
+                                                 * (*getProjectionMatrix()));
+                modelview = createOrReuseMatrix(camera.getViewMatrix()
+                                                * (*getModelViewMatrix()));
+            }
+        } else {
+            // an absolute reference frame
+            projection = createOrReuseMatrix(camera.getProjectionMatrix());
+            modelview = createOrReuseMatrix(camera.getViewMatrix());
+        }
+        if (camera.getViewport())
+            pushViewport(camera.getViewport());
+
+        pushProjectionMatrix(projection);
+        pushModelViewMatrix(modelview, camera.getReferenceFrame());    
+
+        traverse(camera);
+    
+        // restore the previous model view matrix.
+        popModelViewMatrix();
+
+        // restore the previous model view matrix.
+        popProjectionMatrix();
+
+        if (camera.getViewport()) popViewport();
+
+        // restore the previous traversal mask settings
+        if (mustSetCullMask)
+            setTraversalMask(savedTraversalMask);
+
+        // restore the previous cull settings
+        setCullSettings(saved_cull_settings);
+    }
+
+protected:
+    // sort in reverse
+    static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
+    {
+        return lhs->second > rhs->second;
+    }
+    InfoMap classInfo;
+    InfoMap nodeInfo;
+};
+
+bool printVisibleSceneInfo(FGRenderer* renderer)
+{
+    osgViewer::Viewer* viewer = renderer->getViewer();
+    VisibleSceneInfoVistor vsv;
+    Viewport* vp = 0;
+    if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
+        const View::Slave& slave = viewer->getSlave(0);
+        vp = slave._camera->getViewport();
+    }
+    vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
+    return true;
+}
+}
 // end of renderer.cxx