source: trunk/VUT/Ogre/src/OgreVisibilityTerrainSceneManager.cpp @ 137

#include "OgreVisibilityTerrainSceneManager.h"
#include "OgreVisibilityOptionsManager.h"
#include <OgreMath.h>
#include <OgreIteratorWrappers.h>
#include <OgreRenderSystem.h>
#include <OgreCamera.h>
#include <OgreLogManager.h>
#include <OgreStringConverter.h>
#include <OgreEntity.h>
#include <OgreSubEntity.h>

namespace Ogre {

//-----------------------------------------------------------------------
VisibilityTerrainSceneManager::VisibilityTerrainSceneManager(
        GtpVisibility::VisibilityManager *visManager): 
mVisibilityManager(visManager), 
mRenderDepthPass(false),
mShowVisualization(false),
mRenderNodesForViz(false),
mRenderNodesContentForViz(false),
mVisualizeCulledNodes(false),
mSkipTransparents(false),
mDelayRenderTransparents(true),
mUseDepthPass(false),
mRenderItemBuffer(false),
mCurrentEntityId(0),
mEnableDepthWrite(true)
{
        mHierarchyInterface = new OctreeHierarchyInterface(this, mDestRenderSystem);
        mQueryManager = new PlatformQueryManager(mHierarchyInterface, mCurrentViewport);

        mVisibilityManager->SetQueryManager(mQueryManager);
        //mDisplayNodes = true;
        //mShowBoundingBoxes = true;

        // TODO: set maxdepth to reasonable value
        mMaxDepth = 50;
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::InitDepthPass()
{
        MaterialPtr depthMat = MaterialManager::getSingleton().getByName("Visibility/DepthPass");

        if (depthMat.isNull())
    {
                // Init
                depthMat = MaterialManager::getSingleton().create(
                "Visibility/DepthPass",
                ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
        mDepthPass = depthMat->getTechnique(0)->getPass(0);
                mDepthPass->setColourWriteEnabled(false);
                mDepthPass->setDepthWriteEnabled(true);
                mDepthPass->setLightingEnabled(false);
        }
        else
        {
                mDepthPass = depthMat->getTechnique(0)->getPass(0);
        }
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::InitItemBufferPass()
{
        MaterialPtr itemBufferMat = MaterialManager::getSingleton().
                getByName("Visibility/ItemBufferPass");

        if (itemBufferMat.isNull())
    {
                // Init
                itemBufferMat = MaterialManager::getSingleton().create("Visibility/ItemBufferPass",
                ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);

                mItemBufferPass = itemBufferMat->getTechnique(0)->getPass(0);
                mItemBufferPass->setColourWriteEnabled(true);
                mItemBufferPass->setDepthWriteEnabled(true);
                mItemBufferPass->setLightingEnabled(true);
        }
        else
        {
                mItemBufferPass = itemBufferMat->getTechnique(0)->getPass(0);
        }
        mItemBufferPass->setAmbient(1, 1, 0);
}
//-----------------------------------------------------------------------
VisibilityTerrainSceneManager::~VisibilityTerrainSceneManager()
{
        if (mHierarchyInterface)
        {
                delete mHierarchyInterface;
                mHierarchyInterface = NULL;
        }
        if (mQueryManager)
        {
                delete mQueryManager;
                mQueryManager = NULL;
        }
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::ShowVisualization(Camera *cam)
{
        // add player camera for visualization purpose
        try 
        {
                Camera *c;
                if ((c = getCamera("PlayerCam")) != NULL)
                {
                        getRenderQueue()->addRenderable(c);
                }   
    }
    catch (...)
    {
        // ignore
    }
        for (BoxList::iterator it = mBoxes.begin(); it != mBoxes.end(); ++it)
        {
                getRenderQueue()->addRenderable(*it);
        }
        if (mRenderNodesForViz || mRenderNodesContentForViz)
        {
                // change node material so it is better suited for visualization
                MaterialPtr nodeMat = MaterialManager::getSingleton().getByName("Core/NodeMaterial");
                nodeMat->setAmbient(1, 1, 0);
                nodeMat->setLightingEnabled(true);
                nodeMat->getTechnique(0)->getPass(0)->removeAllTextureUnitStates();

                for (NodeList::iterator it = mVisible.begin(); it != mVisible.end(); ++it)
                {
                        if (mRenderNodesForViz)
                        {
                                //getRenderQueue()->addRenderable(*it);

                                // addbounding boxes instead of node itself
                                (*it)->_addBoundingBoxToQueue(getRenderQueue());
                        }
                        if (mRenderNodesContentForViz) 
                        {
                                (*it)->_addToRenderQueue(cam, getRenderQueue(), false);
                        }
                }
        }       
}
//-----------------------------------------------------------------------
Pass *VisibilityTerrainSceneManager::setPass(Pass* pass)
{
        //Pass *usedPass = ((mRenderDepthPass && !pass->hasVertexProgram()) ? mDepthPass : pass); // setting vertex program is not efficient
        
        // set depth fill pass only if depth write enabled
        Pass *usedPass = (mRenderDepthPass && !mHierarchyInterface->IsBoundingBoxQuery() ? 
                                          mDepthPass : pass);
                
        IlluminationRenderStage savedStage = mIlluminationStage; 
        
        // set illumination stage to NONE so no shadow material is used 
        // for depth pass or for occlusion query
        if (mRenderDepthPass || mHierarchyInterface->IsBoundingBoxQuery())
        {
                mIlluminationStage = IRS_NONE;
        }
        
        if (mRenderDepthPass)
        {
                // --- set vertex program of current pass so z-buffer is updated correctly
        if (pass->hasVertexProgram())
                {
                        mDepthPass->setVertexProgram(pass->getVertexProgramName());

                        if (mDepthPass->hasVertexProgram())
                        {
                                const GpuProgramPtr& prg = mDepthPass->getVertexProgram();
                                // Load this program if not done already
                                if (!prg->isLoaded())
                                        prg->load();
                                // Copy params
                                mDepthPass->setVertexProgramParameters(pass->getVertexProgramParameters());
                        }
                }
                else if (mDepthPass->hasVertexProgram())
                {
                        mDepthPass->setVertexProgram("");
                }
        }

        bool IsDepthWrite = usedPass->getDepthWriteEnabled();
        // global option which enables / disables depth writes
        if (!mEnableDepthWrite)
        {
                usedPass->setDepthWriteEnabled(false);
        }

        //else if (mIsItemBufferPass) {usedPass = mItemBufferPass;}
        
        Pass *result = SceneManager::setPass(usedPass);

        // reset depth write
        if (!mEnableDepthWrite)
        {
                usedPass->setDepthWriteEnabled(IsDepthWrite);
        }

        // reset illumination stage
        mIlluminationStage = savedStage;

        return result;
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::_findVisibleObjects(Camera* cam, bool onlyShadowCasters)
{
        // needs full ambient lighting for item colors to be exact
        /*if (mRenderItemBuffer)
        {       setAmbientLight(ColourValue(1,1,1,1)); }*/
        
        //-- show visible scene nodes and octree bounding boxes from last frame
        if (mShowVisualization)
    {
                ShowVisualization(cam);
        }
        
        //TerrainSceneManager::_findVisibleObjects(cam, onlyShadowCasters);
        
        mVisible.clear();
        mBoxes.clear();
        
        // if there is no depth pass =>
        // we interleave identification and rendering of objects 
        // in _renderVisibibleObjects

        // only shadow casters will be rendered in shadow texture pass
        mHierarchyInterface->SetOnlyShadowCasters(onlyShadowCasters);

        bool leaveTransparentsInQueue = mDelayRenderTransparents && !mUseDepthPass;

        // possible two cameras (one for culling, one for rendering)
        mHierarchyInterface->InitFrame(mOctree, cam, //mCameraInProgress, 
                                                mCullCamera ? getCamera("CullCamera") : NULL,
                                                leaveTransparentsInQueue);
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::_renderVisibleObjects()
{
        // increase terrain renderlevel
        int renderLevel = TerrainRenderable::getCurrentRenderLevelIndex() + 1;

        if (TerrainRenderable::getCurrentRenderLevelIndex() >= 10)
        {   // max. 10 different renderlevels
                renderLevel = 0;
        }

        // visualization: apply standard rendering
        if (mShowVisualization)
        {       
                TerrainSceneManager::_renderVisibleObjects();
                TerrainRenderable::setCurrentRenderLevelIndex(renderLevel);
                return;
        }

        InitDepthPass();        // create material for depth pass
        InitItemBufferPass(); // create material for item buffer pass

        //-- hierarchical culling
        // the objects of different layers (e.g., background, scene, 
        // overlay) must be identified and rendered one after another

        // frame initialisation to reset culling manager stats
        mVisibilityManager->GetCullingManager()->InitFrame(mVisualizeCulledNodes);
        
        mSkipTransparents = false;

        //-- render background, in case there is one
        clearSpecialCaseRenderQueues();
        addSpecialCaseRenderQueue(RENDER_QUEUE_BACKGROUND);
        addSpecialCaseRenderQueue(RENDER_QUEUE_SKIES_EARLY);
        setSpecialCaseRenderQueueMode(SceneManager::SCRQM_INCLUDE);

        TerrainSceneManager::_renderVisibleObjects();

#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        _deleteRenderedQueueGroups(false);
#endif

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

        // transparents are skipped from hierarchical rendering
        // => they need sorting, thus we render them afterwards
        mSkipTransparents = mDelayRenderTransparents;

        // set state for depth pass
    mRenderDepthPass = mUseDepthPass;
        
        /** 
          * the hierarchical culling algorithm
          * for depth pass: will just find objects and update depth buffer
          * for delayed rendering: will render all but transparents
        **/
        
        mVisibilityManager->ApplyVisibilityCulling();

        // delete remaining renderables from queue (or all but transparents)
#ifdef GTP_VISIBILITY_MODIFIED_OGRE
        _deleteRenderedQueueGroups(mSkipTransparents);
#endif

        // for depth pass: add visible nodes found with the visibility culling
        if (mUseDepthPass)
        {
                for (NodeList::iterator it = mVisible.begin(); it != mVisible.end(); ++it)
                {
                        (*it)->_addToRenderQueue(mCameraInProgress, getRenderQueue(), false);
                }
                mRenderDepthPass = false;
        }

        mSkipTransparents = false;

        //-- now we can render all remaining queue objects
        // for depth pass: all
        // for delayed rendering: transparents, overlay 
        clearSpecialCaseRenderQueues();
        TerrainSceneManager::_renderVisibleObjects();

        TerrainRenderable::setCurrentRenderLevelIndex(renderLevel);
        getRenderQueue()->clear();
        //WriteLog(); // write out stats
}

//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::_updateSceneGraph(Camera* cam)
{
        mVisibilityManager->GetCullingManager()->SetHierarchyInterface(mHierarchyInterface);
        mHierarchyInterface->SetRenderSystem(mDestRenderSystem);

#ifdef GTP_VISIBILITY_MODIFIED_OGRE
    mHierarchyInterface->SetNumOctreeNodes(mNumOctreeNodes);
#endif
        TerrainSceneManager::_updateSceneGraph(cam);
}
//-----------------------------------------------------------------------
bool VisibilityTerrainSceneManager::setOption(const String & key, const void * val)
{
        if (key == "UseDepthPass")
        {
                mUseDepthPass = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "ShowVisualization")
        {
                mShowVisualization = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "RenderNodesForViz")
        {
                mRenderNodesForViz = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "RenderNodesContentForViz")
        {
                mRenderNodesContentForViz = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "SkyBoxEnabled")
        {
                mSkyBoxEnabled = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "SkyPlaneEnabled")
        {
                mSkyPlaneEnabled = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "SkyDomeEnabled")
        {
                mSkyDomeEnabled = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "VisualizeCulledNodes")
        {
                mVisualizeCulledNodes = (*static_cast<const bool *>(val));
                return true;
        }
        if (key == "DelayRenderTransparents")
        {
                mDelayRenderTransparents = (*static_cast<const bool *>(val));
                return true;
        }
        // notifiy that frame has ended so terrain render level can be reset for correct
        // terrain rendering
        if (key == "TerrainLevelIdx")
        {
                TerrainRenderable::setCurrentRenderLevelIndex((*static_cast<const int *>(val)));
                return true;
        }
        if (key == "DepthWrite")
        {
                mEnableDepthWrite = (*static_cast<const bool *>(val));
                return true;
        }
        return VisibilityOptionsManager(mVisibilityManager, mHierarchyInterface).
                setOption(key, val) || TerrainSceneManager::setOption(key, val);
}
//-----------------------------------------------------------------------
bool VisibilityTerrainSceneManager::getOption(const String & key, void *val)
{
        if (key == "NumHierarchyNodes")
        {
                * static_cast<unsigned int *>(val) = (unsigned int)mNumOctreeNodes;
                return true;
        }
        
        return VisibilityOptionsManager(mVisibilityManager, mHierarchyInterface).
                getOption(key, val) && TerrainSceneManager::getOption(key, val);
}
//-----------------------------------------------------------------------
bool VisibilityTerrainSceneManager::getOptionValues(const String & key, StringVector &refValueList)
{
        return TerrainSceneManager::getOptionValues( key, refValueList);
}
//-----------------------------------------------------------------------
bool VisibilityTerrainSceneManager::getOptionKeys(StringVector & refKeys)
{
        return VisibilityOptionsManager(mVisibilityManager, mHierarchyInterface).
                getOptionKeys(refKeys) || TerrainSceneManager::getOptionKeys(refKeys);
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::setVisibilityManager(GtpVisibility::VisibilityManager *visManager)
{
        mVisibilityManager = visManager;
}
//-----------------------------------------------------------------------
GtpVisibility::VisibilityManager *VisibilityTerrainSceneManager::getVisibilityManager( void )
{
        return mVisibilityManager;
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::WriteLog()
{
        std::stringstream d;

        d << "Depth pass: " << StringConverter::toString(mUseDepthPass) << ", "
          << "Delay transparents: " << StringConverter::toString(mDelayRenderTransparents) << ", "
          << "Use optimization: " << StringConverter::toString(mHierarchyInterface->GetUseOptimization()) << ", "
          << "Algorithm type: " << mVisibilityManager->GetCullingManagerType() << ", "
          << "Hierarchy nodes: " << mNumOctreeNodes << ", " 
          << "Traversed nodes: " << mHierarchyInterface->GetNumTraversedNodes() << ", "
          << "Rendered nodes: " << mHierarchyInterface->GetNumRenderedNodes() << ", "
          << "Query culled nodes: " << mVisibilityManager->GetCullingManager()->GetNumQueryCulledNodes() << ", "
          << "Frustum culled nodes: " << mVisibilityManager->GetCullingManager()->GetNumFrustumCulledNodes() << ", "
      << "Queries issued: " << mVisibilityManager->GetCullingManager()->GetNumQueriesIssued() << "\n";

        LogManager::getSingleton().logMessage(d.str());
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::renderObjects(const RenderPriorityGroup::TransparentRenderablePassList& objs, 
            bool doLightIteration, const LightList* manualLightList)
{
        // for correct rendering, transparents must be rendered after hierarchical culling
        if (!mSkipTransparents)
        {
                OctreeSceneManager::renderObjects(objs, doLightIteration, manualLightList);
        }
}
//-----------------------------------------------------------------------
bool VisibilityTerrainSceneManager::validatePassForRendering(Pass* pass)
{
        // skip all but first pass if we are doing the depth pass
        if ((mRenderDepthPass || mRenderItemBuffer) && pass->getIndex() > 0)
        {
                return false;
        }
        return SceneManager::validatePassForRendering(pass);
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::renderQueueGroupObjects(RenderQueueGroup* pGroup)
{
        if (!mRenderItemBuffer)
        {
                TerrainSceneManager::renderQueueGroupObjects(pGroup);
                return;
        }

        //--- item buffer
    // Iterate through priorities
    RenderQueueGroup::PriorityMapIterator groupIt = pGroup->getIterator();

        while (groupIt.hasMoreElements())
    {
                RenderItemBuffer(groupIt.getNext());
        }
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::RenderItemBuffer(RenderPriorityGroup* pGroup)
{
        // Do solids
        RenderPriorityGroup::SolidRenderablePassMap solidObjs = pGroup->_getSolidPasses();

        // ----- SOLIDS LOOP -----
        RenderPriorityGroup::SolidRenderablePassMap::const_iterator ipass, ipassend;
        ipassend = solidObjs.end();

        for (ipass = solidObjs.begin(); ipass != ipassend; ++ipass)
        {
                // Fast bypass if this group is now empty
                if (ipass->second->empty()) 
                        continue;

                // Render only first pass
                if (ipass->first->getIndex() > 0)
                        continue;

                RenderPriorityGroup::RenderableList* rendList = ipass->second;
                
                RenderPriorityGroup::RenderableList::const_iterator irend, irendend;
                irendend = rendList->end();
                        
                for (irend = rendList->begin(); irend != irendend; ++irend)
                {
                        std::stringstream d; d << "itembuffer, pass name: " << 
                                ipass->first->getParent()->getParent()->getName();
                                //<< ", renderable name: " << irend->

                        LogManager::getSingleton().logMessage(d.str());
                        
                        //if(ipass->first->getParent()->getParent()->getName() == "Examples/Athene")
                                //<< ", renderable name: " << irend->
                                RenderSingleObjectForItemBuffer(*irend, ipass->first);
                                //RenderSingleObjectForOcclusionQuery(
                }
        }

        // ----- TRANSPARENT LOOP: must be handled differently 
        // although we don't really     care about transparents for the item buffer
        // TODO: HOW TO HANDLE OCCLUDED OBJECTS ????
        RenderPriorityGroup::TransparentRenderablePassList
                transpObjs = pGroup->_getTransparentPasses();
        RenderPriorityGroup::TransparentRenderablePassList::const_iterator itrans, itransend;

        itransend = transpObjs.end();
        for (itrans = transpObjs.begin(); itrans != itransend; ++itrans)
        {
                // like for solids, render only first pass
                if (itrans->pass->getIndex() == 0)
                {       
                        RenderSingleObjectForItemBuffer(itrans->renderable, itrans->pass);
                }
        } 
}
//-----------------------------------------------------------------------
void VisibilityTerrainSceneManager::RenderSingleObjectForItemBuffer(Renderable *rend, Pass *pass)
{
        static LightList nullLightList;

        Real col = (Real)rend->getId() / (Real)mCurrentEntityId;

        mItemBufferPass->setAmbient(ColourValue(0, 1, 1));
        //mItemBufferPass->setDiffuse(ColourValue(0, col, 0));
//      mItemBufferPass->setSpecular(ColourValue(0, col, 0));
//      mItemBufferPass->_load();

        // set vertex program of current pass
        if (pass->hasVertexProgram())
        {
                mItemBufferPass->setVertexProgram(pass->getVertexProgramName());

                if (mItemBufferPass->hasVertexProgram())
                {
                        const GpuProgramPtr& prg = mItemBufferPass->getVertexProgram();
                        // Load this program if not done already
                        if (!prg->isLoaded())
                                prg->load();
                        // Copy params
                        mItemBufferPass->setVertexProgramParameters(pass->getVertexProgramParameters());
                }
        }
        else if (mItemBufferPass->hasVertexProgram())
        {
                mItemBufferPass->setVertexProgram("");
        }

        //LogManager::getSingleton().logMessage("has vertex program");
        Pass *usedPass = setPass(mItemBufferPass); 
        //Pass *usedPass = setPass(pass);
        std::stringstream d;
        d << "item buffer id: " << rend->getId() << ", col: " << col;
        LogManager::getSingleton().logMessage(d.str());

        // Render a single object, this will set up auto params if required
        renderSingleObject(rend, usedPass, false, &nullLightList);
}
//-----------------------------------------------------------------------
GtpVisibility::VisibilityManager *VisibilityTerrainSceneManager::GetVisibilityManager()
{
        return mVisibilityManager;
}
//-----------------------------------------------------------------------
Entity* VisibilityTerrainSceneManager::createEntity(const String& entityName, 
                                                                                                        const String& meshName)
{
        Entity *ent = SceneManager::createEntity(entityName, meshName);

        for (int i = 0; i < (int)ent->getNumSubEntities(); ++i)
        {
                ent->getSubEntity(i)->setId(mCurrentEntityId ++);
        }

        return ent;
}

} // namespace Ogre