source: GTP/trunk/Lib/Illum/IllumModule/OgreIllumModule/src/OgreSharedRuns.cpp @ 790

#include "..\include\OgreSharedRuns.h"
#include "OgreIlluminationManager.h"

RenderingRun* OgreSharedRuns::getRun(RenderingRunType runType)
{
/*      if(parent != 0) 
                return parent->getRun(runType);*/
        
        if( hasOwnRun(runType) )
                return sharedRuns[runType];

        if(child1 != 0)
        {
                RenderingRun* run = child1->getRun(runType);
                if( run != 0)
                        return run;
        }
        
        if(child2 != 0)
                return child2->getRun(runType);

        return 0;
}

void OgreSharedRuns::addRun(RenderingRunType runType, RenderingRun* run)
{
        sharedRuns[runType] = run;
}

void OgreSharedRuns::updateRun(RenderingRunType runType, unsigned long frameNum)
{
        /*
        if(parent != 0) 
                parent->updateRun(runType, frameNum);
        else
                sharedRuns[runType]->update(frameNum);
        */
        getRun(runType)->update(frameNum);
}

bool OgreSharedRuns::hasOwnRun(RenderingRunType runType)
{
        if(sharedRuns.find(runType) == sharedRuns.end())
                return false;

        return true;
}

void OgreSharedRuns::gatherRuns()
{
        OgreSharedRuns* child1 = (OgreSharedRuns*) this->child1;
        OgreSharedRuns* child2 = (OgreSharedRuns*) this->child2;

        std::map<RenderingRunType, RenderingRun*>::iterator it = child1->sharedRuns.begin();
        std::map<RenderingRunType, RenderingRun*>::iterator itend = child1->sharedRuns.end();
        
        while(it != itend)
        {
                if( child2->hasOwnRun((*it).first) )
                        sharedRuns[(*it).first] = (*it).second;

                it++;
        }
        
}

void OgreSharedRuns::updateBounds()
{
        if(child1)
        {
                OgreSharedRuns* child1 = (OgreSharedRuns*) this->child1;
                OgreSharedRuns* child2 = (OgreSharedRuns*) this->child2;

                boundingBox = child1->boundingBox;
                boundingBox.merge(child2->boundingBox);

                boundingSphere.setCenter((child1->boundingSphere.getCenter()
                                                                                + child2->boundingSphere.getCenter())/2.0);
                float dist = (child1->boundingSphere.getCenter() 
                                                - child2->boundingSphere.getCenter()).length();
                float radius1 = child1->boundingSphere.getRadius();
                float radius2 = child2->boundingSphere.getRadius();
                float maxrad = std::max(radius1, radius2);
                
                if(radius1 + dist <= radius2)boundingSphere.setRadius(radius2);
                else if(radius2 + dist <= radius1)boundingSphere.setRadius(radius1);
                else boundingSphere.setRadius(dist + maxrad);
        }
        else
        {
                std::map<OgreRenderable*, bool>::iterator it = renderables.begin();
                OgreRenderable* rend = (*it).first;
                rend->updateBounds();
                boundingBox = rend->getBoundingBox();
                boundingSphere = rend->getBoundingSphere();             
        }
}

void OgreSharedRuns::fireRunChanges()
{
        std::map<RenderingRunType, RenderingRun*>::iterator it = sharedRuns.begin();
        std::map<RenderingRunType, RenderingRun*>::iterator itend = sharedRuns.end();

        while(it != itend)
        {
                runChanged( (*it).first, (*it).second );
                runChanged( (*it).first, (*it).second );
                it++;
        }
}

SharedRuns* OgreSharedRuns::createInstance()
{
        return new OgreSharedRuns();
}

void OgreSharedRuns::validate()
{
        updateBounds();
        if(child1 == 0)
        {
                if(parent != 0) 
                        parent->validate();
                return;
        }
        if( canJoin(child1, child2))
        {
                if(parent != 0) parent->validate();
        }
        else    //destroy this shared object with parents
                destroy();      
}

bool OgreSharedRuns::haveCommonRuns(SharedRuns* r1, SharedRuns* r2)
{
        OgreSharedRuns* run1 = (OgreSharedRuns*) r1;
        OgreSharedRuns* run2 = (OgreSharedRuns*) r2;

        std::map<RenderingRunType, RenderingRun*>::iterator it = run1->sharedRuns.begin();
        std::map<RenderingRunType, RenderingRun*>::iterator itend = run1->sharedRuns.end();

        while(it != itend)
        {
                if( run2->hasOwnRun((*it).first))
                        return true;
                it++;
        }

        return false;
}

bool OgreSharedRuns::canJoin(SharedRuns* r1, SharedRuns* r2)
{
        //check if they have common resources
        if(!haveCommonRuns(r1, r2))
                return false;

        //check bounds
        float MAXRAD = OgreIlluminationManager::getSingleton().getMaxJoinRadius();

        Sphere bSphere1 = ((OgreSharedRuns*) r1)->getBoundingSphere();
        Sphere bSphere2 = ((OgreSharedRuns*) r2)->getBoundingSphere();

        float radius1 = bSphere1.getRadius();
        float radius2 = bSphere2.getRadius();
        float dist = (bSphere1.getCenter() - bSphere2.getCenter()).length(); 
        float maxrad = std::max(radius1,radius2);

        if(dist + radius1 <= radius2 && radius2 < MAXRAD) return true;
        else if(dist + radius2 <= radius1 && radius1 < MAXRAD) return true;
        else if(        maxrad + dist < MAXRAD) return true;

        return false;
}

void OgreSharedRuns::destroy()
{
        if(parent != 0)
                parent->destroy();

        OgreIlluminationManager::getSingleton().sharedRunSplit(this, child1, child2);

        ((OgreSharedRuns*)child1)->fireRunChanges();
        ((OgreSharedRuns*)child2)->fireRunChanges();
        child1->unbindParent();
        child2->unbindAndKillParent();
}

void OgreSharedRuns::addRenderablesToQueue(RenderQueue* rq)
{
        if(child1 != 0) //node
        {
                ((OgreSharedRuns*)child1)->addRenderablesToQueue(rq);
                ((OgreSharedRuns*)child2)->addRenderablesToQueue(rq);
        }
        else //leaf
        {
                std::map<OgreRenderable*, bool>::iterator it = renderables.begin();
                std::map<OgreRenderable*, bool>::iterator itend = renderables.end();
                while(it != itend)
                {               
                        if((*it).first->isVisible())
                                rq->addRenderable(((*it).first)->getRenderable());
                        it++;
                }
        }
}

void OgreSharedRuns::notifyCamera(Camera* cam)
{
        if(child1 != 0) //node
        {
                ((OgreSharedRuns*)child1)->notifyCamera(cam);
                ((OgreSharedRuns*)child2)->notifyCamera(cam);           
        }
        else
        {
                std::map<OgreRenderable*, bool>::iterator it = renderables.begin();
                std::map<OgreRenderable*, bool>::iterator itend = renderables.end();
                while(it != itend)
                {       
                        OgreRenderable* rend = (*it).first;
                        if((*it).first->isVisible())
                                rend->notifyCamera(cam);
                        it++;
                }
        }
}

void OgreSharedRuns::findSharedRootsForType(RenderingRunType runType, std::vector<OgreSharedRuns*>& roots)
{
        if(hasOwnRun(runType))
        {
                roots.push_back(this);
        }

        if(child1 != 0)
                ((OgreSharedRuns*)child1)->findSharedRootsForType(runType, roots);
        if(child2 != 0)
                ((OgreSharedRuns*)child2)->findSharedRootsForType(runType, roots);
}