Changeset 4332 for OpenSceneGraph/trunk/examples/osgprerender/osgprerender.cpp

Timestamp:

06/14/05 22:51:35 (8 years ago)

Author:

robert

Message:

Work on the RenderToTexture? usage of the new osg::CameraNode?. Both osghud
and osgprerender now ported across to osg::CameraNode?.

Files:

• OpenSceneGraph/trunk/examples/osgprerender/osgprerender.cpp (modified) (3 diffs)

OpenSceneGraph/trunk/examples/osgprerender/osgprerender.cpp

@@ -24 +24 @@
 #include <osgProducer/Viewer>
 
-class MyUpdateCallback : public osg::NodeCallback
-{
-    public:
-    
-        MyUpdateCallback(osg::Node* subgraph):
-            _subgraph(subgraph) {}
-
-        virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
-        {
-            // traverse the subgraph to update any nodes.
-            if (_subgraph.valid()) _subgraph->accept(*nv);
-        
-            // must traverse the Node's subgraph            
-            traverse(node,nv);
-        }
-        
-        osg::ref_ptr<osg::Node>     _subgraph;
-};
-
-class MyCullCallback : public osg::NodeCallback
-{
-    public:
-    
-        MyCullCallback(osg::Node* subgraph,osg::Texture2D* texture):
-            _subgraph(subgraph),
-            _texture(texture),
-            _localState(new osg::StateSet) {}
-
-        MyCullCallback(osg::Node* subgraph,osg::Image* image):
-            _subgraph(subgraph),
-            _image(image),
-            _localState(new osg::StateSet) {}
-        
-        virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
-        {
-
-            osgUtil::CullVisitor* cullVisitor = dynamic_cast<osgUtil::CullVisitor*>(nv);
-            if (cullVisitor && (_texture.valid()|| _image.valid()) && _subgraph.valid())
-            {            
-                doPreRender(*node,*cullVisitor);
-
-                // must traverse the subgraph            
-                traverse(node,nv);
-
-            }
-            else
+#define USE_CAMERA_NODE
+
+#ifndef USE_CAMERA_NODE
+
+    class MyUpdateCallback : public osg::NodeCallback
+    {
+        public:
+
+            MyUpdateCallback(osg::Node* subgraph):
+                _subgraph(subgraph) {}
+
+            virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
             {
-                // must traverse the subgraph            
+                // traverse the subgraph to update any nodes.
+                if (_subgraph.valid()) _subgraph->accept(*nv);
+
+                // must traverse the Node's subgraph            
                 traverse(node,nv);
             }
+
+            osg::ref_ptr<osg::Node>     _subgraph;
+    };
+
+
+    class MyCullCallback : public osg::NodeCallback
+    {
+        public:
+
+            MyCullCallback(osg::Node* subgraph,osg::Texture2D* texture):
+                _subgraph(subgraph),
+                _texture(texture),
+                _localState(new osg::StateSet) {}
+
+            MyCullCallback(osg::Node* subgraph,osg::Image* image):
+                _subgraph(subgraph),
+                _image(image),
+                _localState(new osg::StateSet) {}
+
+            virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
+            {
+
+                osgUtil::CullVisitor* cullVisitor = dynamic_cast<osgUtil::CullVisitor*>(nv);
+                if (cullVisitor && (_texture.valid()|| _image.valid()) && _subgraph.valid())
+                {            
+                    doPreRender(*node,*cullVisitor);
+
+                    // must traverse the subgraph            
+                    traverse(node,nv);
+
+                }
+                else
+                {
+                    // must traverse the subgraph            
+                    traverse(node,nv);
+                }
+            }
+
+            void doPreRender(osg::Node& node, osgUtil::CullVisitor& cv);
+
+            osg::ref_ptr<osg::Node>      _subgraph;
+            osg::ref_ptr<osg::Texture2D> _texture;
+            osg::ref_ptr<osg::Image>     _image;
+            osg::ref_ptr<osg::StateSet>  _localState;
+
+    };
+
+    void MyCullCallback::doPreRender(osg::Node&, osgUtil::CullVisitor& cv)
+    {   
+        const osg::BoundingSphere& bs = _subgraph->getBound();
+        if (!bs.valid())
+        {
+            osg::notify(osg::WARN) << "bb invalid"<<_subgraph.get()<<std::endl;
+            return;
         }
-        
-        void doPreRender(osg::Node& node, osgUtil::CullVisitor& cv);
-        
-        osg::ref_ptr<osg::Node>      _subgraph;
-        osg::ref_ptr<osg::Texture2D> _texture;
-        osg::ref_ptr<osg::Image>     _image;
-        osg::ref_ptr<osg::StateSet>  _localState;
-    
-};
-
-void MyCullCallback::doPreRender(osg::Node&, osgUtil::CullVisitor& cv)
-{   
-    const osg::BoundingSphere& bs = _subgraph->getBound();
-    if (!bs.valid())
-    {
-        osg::notify(osg::WARN) << "bb invalid"<<_subgraph.get()<<std::endl;
-        return;
-    }
-    
-
-    // create the render to texture stage.
-    osg::ref_ptr<osgUtil::RenderToTextureStage> rtts = new osgUtil::RenderToTextureStage;
-
-    // set up lighting.
-    // currently ignore lights in the scene graph itself..
-    // will do later.
-    osgUtil::RenderStage* previous_stage = cv.getCurrentRenderBin()->getStage();
-
-    // set up the background color and clear mask.
-    rtts->setClearColor(osg::Vec4(0.1f,0.1f,0.3f,1.0f));
-    rtts->setClearMask(previous_stage->getClearMask());
-
-    // set up to charge the same RenderStageLighting is the parent previous stage.
-    rtts->setRenderStageLighting(previous_stage->getRenderStageLighting());
-
-
-    // record the render bin, to be restored after creation
-    // of the render to text
-    osgUtil::RenderBin* previousRenderBin = cv.getCurrentRenderBin();
-
-    // set the current renderbin to be the newly created stage.
-    cv.setCurrentRenderBin(rtts.get());
-
-
-    float znear = 1.0f*bs.radius();
-    float zfar  = 3.0f*bs.radius();
-        
-    // 2:1 aspect ratio as per flag geomtry below.
-    float top   = 0.25f*znear;
-    float right = 0.5f*znear;
-
-    znear *= 0.9f;
-    zfar *= 1.1f;
-
-    // set up projection.
-    osg::RefMatrix* projection = new osg::RefMatrix;
-    projection->makeFrustum(-right,right,-top,top,znear,zfar);
-
-    cv.pushProjectionMatrix(projection);
-
-    osg::RefMatrix* matrix = new osg::RefMatrix;
-    matrix->makeLookAt(bs.center()+osg::Vec3(0.0f,2.0f,0.0f)*bs.radius(),bs.center(),osg::Vec3(0.0f,0.0f,1.0f));
-
-    cv.pushModelViewMatrix(matrix);
-
-    cv.pushStateSet(_localState.get());
-
-    {
-
-        // traverse the subgraph
-        _subgraph->accept(cv);
-
-    }
-
-    cv.popStateSet();
-
-    // restore the previous model view matrix.
-    cv.popModelViewMatrix();
-
-    // restore the previous model view matrix.
-    cv.popProjectionMatrix();
-
-    // restore the previous renderbin.
-    cv.setCurrentRenderBin(previousRenderBin);
-
-    if (rtts->getRenderGraphList().size()==0 && rtts->getRenderBinList().size()==0)
-    {
-        // getting to this point means that all the subgraph has been
-        // culled by small feature culling or is beyond LOD ranges.
-        return;
-    }
-
-
-
-    int height = 256;
-    int width  = 512;
-
-
-    const osg::Viewport& viewport = *cv.getViewport();
-
-    // offset the impostor viewport from the center of the main window
-    // viewport as often the edges of the viewport might be obscured by
-    // other windows, which can cause image/reading writing problems.
-    int center_x = viewport.x()+viewport.width()/2;
-    int center_y = viewport.y()+viewport.height()/2;
-
-    osg::Viewport* new_viewport = new osg::Viewport;
-    new_viewport->setViewport(center_x-width/2,center_y-height/2,width,height);
-    rtts->setViewport(new_viewport);
-    
-    _localState->setAttribute(new_viewport);
-
-    // and the render to texture stage to the current stages
-    // dependancy list.
-    cv.getCurrentRenderBin()->getStage()->addToDependencyList(rtts.get());
-
-    // if one exist attach texture to the RenderToTextureStage.
-    if (_texture.valid()) rtts->setTexture(_texture.get());
-
-    // if one exist attach image to the RenderToTextureStage.
-    if (_image.valid()) rtts->setImage(_image.get());
-
-}
+
+
+        // create the render to texture stage.
+        osg::ref_ptr<osgUtil::RenderToTextureStage> rtts = new osgUtil::RenderToTextureStage;
+
+        // set up lighting.
+        // currently ignore lights in the scene graph itself..
+        // will do later.
+        osgUtil::RenderStage* previous_stage = cv.getCurrentRenderBin()->getStage();
+
+        // set up the background color and clear mask.
+        rtts->setClearColor(osg::Vec4(0.1f,0.1f,0.3f,1.0f));
+        rtts->setClearMask(previous_stage->getClearMask());
+
+        // set up to charge the same RenderStageLighting is the parent previous stage.
+        rtts->setRenderStageLighting(previous_stage->getRenderStageLighting());
+
+
+        // record the render bin, to be restored after creation
+        // of the render to text
+        osgUtil::RenderBin* previousRenderBin = cv.getCurrentRenderBin();
+
+        // set the current renderbin to be the newly created stage.
+        cv.setCurrentRenderBin(rtts.get());
+
+
+        float znear = 1.0f*bs.radius();
+        float zfar  = 3.0f*bs.radius();
+
+        // 2:1 aspect ratio as per flag geomtry below.
+        float top   = 0.25f*znear;
+        float right = 0.5f*znear;
+
+        znear *= 0.9f;
+        zfar *= 1.1f;
+
+        // set up projection.
+        osg::RefMatrix* projection = new osg::RefMatrix;
+        projection->makeFrustum(-right,right,-top,top,znear,zfar);
+
+        cv.pushProjectionMatrix(projection);
+
+        osg::RefMatrix* matrix = new osg::RefMatrix;
+        matrix->makeLookAt(bs.center()+osg::Vec3(0.0f,2.0f,0.0f)*bs.radius(),bs.center(),osg::Vec3(0.0f,0.0f,1.0f));
+
+        cv.pushModelViewMatrix(matrix);
+
+        cv.pushStateSet(_localState.get());
+
+        {
+
+            // traverse the subgraph
+            _subgraph->accept(cv);
+
+        }
+
+        cv.popStateSet();
+
+        // restore the previous model view matrix.
+        cv.popModelViewMatrix();
+
+        // restore the previous model view matrix.
+        cv.popProjectionMatrix();
+
+        // restore the previous renderbin.
+        cv.setCurrentRenderBin(previousRenderBin);
+
+        if (rtts->getRenderGraphList().size()==0 && rtts->getRenderBinList().size()==0)
+        {
+            // getting to this point means that all the subgraph has been
+            // culled by small feature culling or is beyond LOD ranges.
+            return;
+        }
+
+
+
+        int height = 256;
+        int width  = 512;
+
+
+        const osg::Viewport& viewport = *cv.getViewport();
+
+        // offset the impostor viewport from the center of the main window
+        // viewport as often the edges of the viewport might be obscured by
+        // other windows, which can cause image/reading writing problems.
+        int center_x = viewport.x()+viewport.width()/2;
+        int center_y = viewport.y()+viewport.height()/2;
+
+        osg::Viewport* new_viewport = new osg::Viewport;
+        new_viewport->setViewport(center_x-width/2,center_y-height/2,width,height);
+        rtts->setViewport(new_viewport);
+
+        _localState->setAttribute(new_viewport);
+
+        // and the render to texture stage to the current stages
+        // dependancy list.
+        cv.getCurrentRenderBin()->getStage()->addToDependencyList(rtts.get());
+
+        // if one exist attach texture to the RenderToTextureStage.
+        if (_texture.valid()) rtts->setTexture(_texture.get());
+
+        // if one exist attach image to the RenderToTextureStage.
+        if (_image.valid()) rtts->setImage(_image.get());
+
+    }
+#endif
 
 // call back which cretes a deformation field to oscilate the model.
@@ -353 +359 @@
     geode->addDrawable(polyGeom);
 
+#ifndef USE_CAMERA_NODE
+
     osg::Group* parent = new osg::Group;
     
@@ -362 +370 @@
     
     return parent;
+
+#else
+
+
+    osg::CameraNode* camera = new osg::CameraNode;
+    
+    // set up the background color and clear mask.
+    camera->setClearColor(osg::Vec4(0.1f,0.1f,0.3f,1.0f));
+    camera->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    const osg::BoundingSphere& bs = subgraph->getBound();
+    if (!bs.valid())
+    {
+        return subgraph;
+    }
+
+    float znear = 1.0f*bs.radius();
+    float zfar  = 3.0f*bs.radius();
+
+    // 2:1 aspect ratio as per flag geomtry below.
+    float proj_top   = 0.25f*znear;
+    float proj_right = 0.5f*znear;
+
+    znear *= 0.9f;
+    zfar *= 1.1f;
+
+    // set up projection.
+    camera->setProjectionMatrixAsFrustum(-proj_right,proj_right,-proj_top,proj_top,znear,zfar);
+
+    // set view
+    camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
+    camera->setViewMatrixAsLookAt(bs.center()+osg::Vec3(0.0f,2.0f,0.0f)*bs.radius(),bs.center(),osg::Vec3(0.0f,0.0f,1.0f));
+
+    // set viewport
+    camera->setViewport(0,0,1024,512);
+    
+    camera->getOrCreateStateSet()->setAttribute(camera->getViewport());
+    
+    // set the camera to render before the main camera.
+    camera->setRenderOrder(osg::CameraNode::PRE_RENDER);
+    
+    camera->attach(osg::CameraNode::COLOR_BUFFER,texture);
+
+    // add subgraph to render
+    camera->addChild(subgraph);
+    
+    
+    // create a group to contain the flag and the pre rendering camera.
+    osg::Group* parent = new osg::Group;
+    
+    parent->addChild(camera);
+    parent->addChild(geode);
+
+
+    return parent;
+
+#endif
 }