source: trunk/VUT/OcclusionCullingSceneManager/src/OgreOcclusionCullingTerrainSceneManager.cpp @ 42

#include "OgreOcclusionCullingTerrainSceneManager.h"
#include "OgreMath.h"
#include "OgreIteratorWrappers.h"
#include "OgreRenderSystem.h"
#include "OgreCamera.h"
#include "OgreHardwareOcclusionQuery.h"
//#include "OgreWireBoundingBox.h"
#include "OgreSolidHalfBoundingBox.h"

#include <windows.h>

namespace Ogre {
        //-----------------------------------------------------------------------
        OcclusionCullingTerrainSceneManager::OcclusionCullingTerrainSceneManager()
        {
                mOcclusionCullingTerrainSceneTraverser = 
                        new OcclusionCullingTerrainSceneTraverser(this, mDestRenderSystem);

                //mDisplayNodes = true;
                //mShowBoundingBoxes = true;
                mShowBoxes = true;
                //mMaxDepth = 20;
        }
        //-----------------------------------------------------------------------
        OcclusionCullingTerrainSceneManager::~OcclusionCullingTerrainSceneManager()
        {
                delete mOcclusionCullingTerrainSceneTraverser;
        }
        //-----------------------------------------------------------------------
        void OcclusionCullingTerrainSceneManager::_renderVisibleObjects(void)
        {
                //-- render background
                clearSpecialCaseRenderQueues();
                addSpecialCaseRenderQueue(RENDER_QUEUE_BACKGROUND);
                addSpecialCaseRenderQueue(RENDER_QUEUE_SKIES_EARLY);
        
                setSpecialCaseRenderQueueMode(SceneManager::SCRQM_INCLUDE);
                SceneManager::_renderVisibleObjects( );
                _deleteRenderedQueueGroups();

                //-- render visible objects (i.e., all but overlay)
                clearSpecialCaseRenderQueues();
                addSpecialCaseRenderQueue(RENDER_QUEUE_OVERLAY);
                setSpecialCaseRenderQueueMode(SceneManager::SCRQM_EXCLUDE);

                mOcclusionCullingTerrainSceneTraverser->setSceneRoot(mOctree);
                mOcclusionCullingTerrainSceneTraverser->renderScene(mCameraInProgress);
                
                _deleteRenderedQueueGroups();

                //-- render overlay
                clearSpecialCaseRenderQueues();
                SceneManager::_renderVisibleObjects( );
        
                clearSpecialCaseRenderQueues();
        }
        //-----------------------------------------------------------------------
        void OcclusionCullingTerrainSceneManager::_findVisibleObjects(Camera* cam, bool onlyShadowCasters)
        {
                // must be empty because objects are found and rendered in an interleaved fashion
                // in _renderVisibibleObjects 
                //char *msg = "now finding visible objects\n"; OutputDebugString(msg);
        }
        //-----------------------------------------------------------------------
        void OcclusionCullingTerrainSceneManager::_updateSceneGraph(Camera* cam)
        {
                //char *msg = "now updating scenegraph\n"; OutputDebugString(msg);
        mOcclusionCullingTerrainSceneTraverser->setNumSceneNodes((int)mSceneNodes.size());
                mOcclusionCullingTerrainSceneTraverser->setRenderSystem(mDestRenderSystem);
        //mOcclusionCullingTerrainSceneTraverser->preprocess();
                mOcclusionCullingTerrainSceneTraverser->setNumOctreeNodes(mNumOctreeNodes);

                TerrainSceneManager::_updateSceneGraph(cam);
        }
        //-----------------------------------------------------------------------
        bool OcclusionCullingTerrainSceneManager::setOption( const String & key, const void * val )
        {
                return mOcclusionCullingTerrainSceneTraverser->setOption( key, val) || TerrainSceneManager::setOption( key, val );
        }
        //-----------------------------------------------------------------------
        bool OcclusionCullingTerrainSceneManager::getOption( const String & key, void *val )
        {
                return mOcclusionCullingTerrainSceneTraverser->getOption( key, val) || TerrainSceneManager::getOption( key, val ) ;
        }
        //-----------------------------------------------------------------------
        bool OcclusionCullingTerrainSceneManager::getOptionValues( const String & key, StringVector  &refValueList )
        {
                return TerrainSceneManager::getOptionValues( key, refValueList );
        }
        //-----------------------------------------------------------------------
        bool OcclusionCullingTerrainSceneManager::getOptionKeys( StringVector & refKeys )
        {
                return mOcclusionCullingTerrainSceneTraverser->getOptionKeys ( refKeys ) || TerrainSceneManager::getOptionKeys( refKeys );
        }
        //-----------------------------------------------------------------------
        void OcclusionCullingTerrainSceneManager::_renderOctant(Camera *cam, Octree *octant)
        {
                //Add stuff to be rendered;
        NodeList::iterator it = octant->mNodes.begin();
         
        while ( it != octant->mNodes.end() )
        {
            OctreeNode *sn = *it;

            mNumObjects++;

                        // check bounding box visibility of scene nodes
                        if( cam->isVisible( sn->_getWorldAABB() ) )
                        {
                                sn->_addToRenderQueue(cam, getRenderQueue(), false );
                                //node->_findVisibleObjects(cam, getRenderQueue(), false, mDisplayNodes, false);
                                mVisible.push_back( sn );

                                if ( mDisplayNodes )
                                        getRenderQueue()->addRenderable( sn );

                                // check if the scene manager or this node wants the bounding box shown.
                                if (sn->getShowBoundingBox() || mShowBoundingBoxes)
                                        sn->_addBoundingBoxToQueue(getRenderQueue());

                                if ( mShowBoxes )
                                        getRenderQueue()->addRenderable(octant->getWireBoundingBox());
                        }
            ++it;
        }

                SceneManager::_renderVisibleObjects();
        
                // delete all rendered objects from renderqueue
                _deleteRenderedQueueGroups();
        }
        //-----------------------------------------------------------------------
        /*unsigned int OcclusionCullingTerrainSceneManager::countNumOctrees(Octree *root)
        {
                unsigned int result = 1;
                                
                for(int i=0; i<8; ++i)
                {
                        Octree *nextChild = root->mChildren[(i & 4) >> 2][(i & 2) >> 1][i & 1];
                
                        if(nextChild != 0)
                                result += countNumOctrees(nextChild);
                }
                
                return result;
        }*/
}