source: OGRE/trunk/ogrenew/OgreMain/src/OgreRenderQueue.cpp @ 692

/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2005 The OGRE Team
Also see acknowledgements in Readme.html

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt.
-----------------------------------------------------------------------------
*/
#include "OgreStableHeaders.h"

#include "OgreRenderQueue.h"

#include "OgreRenderable.h"
#include "OgreMaterial.h"
#include "OgreRenderQueueSortingGrouping.h"
#include "OgrePass.h"
#include "OgreMaterialManager.h"


namespace Ogre {

    //---------------------------------------------------------------------
    RenderQueue::RenderQueue()
        : mSplitPassesByLightingType(false)
                , mSplitNoShadowPasses(false)
        , mShadowCastersCannotBeReceivers(false)
                , mRenderableListener(0)
    {
        // Create the 'main' queue up-front since we'll always need that
        mGroups.insert(
            RenderQueueGroupMap::value_type(
                RENDER_QUEUE_MAIN, 
                new RenderQueueGroup(this,
                    mSplitPassesByLightingType,
                    mSplitNoShadowPasses,
                    mShadowCastersCannotBeReceivers)
                )
            );

        // set default queue
        mDefaultQueueGroup = RENDER_QUEUE_MAIN;
                mDefaultRenderablePriority = OGRE_RENDERABLE_DEFAULT_PRIORITY;

    }
    //---------------------------------------------------------------------
    RenderQueue::~RenderQueue()
    {
        
        // trigger the pending pass updates, otherwise we could leak
        Pass::processPendingPassUpdates();
        
        // Destroy the queues for good
        RenderQueueGroupMap::iterator i, iend;
        i = mGroups.begin();
        iend = mGroups.end();
        for (; i != iend; ++i)
        {
            delete i->second;
        }
        mGroups.clear();




    }
    //-----------------------------------------------------------------------
    void RenderQueue::addRenderable(Renderable* pRend, uint8 groupID, ushort priority)
    {
        // Find group
        RenderQueueGroup* pGroup = getQueueGroup(groupID);


                Technique* pTech;

                // tell material it's been used
                if (!pRend->getMaterial().isNull())
                        pRend->getMaterial()->touch();

                // Check material & technique supplied (the former since the default implementation
        // of getTechnique is based on it for backwards compatibility
        if(pRend->getMaterial().isNull() || !pRend->getTechnique())
        {
            // Use default base white
                        MaterialPtr baseWhite = MaterialManager::getSingleton().getByName("BaseWhite");
            pTech = baseWhite->getTechnique(0);
        }
        else
        {
            // Get technique
            pTech = pRend->getTechnique();
        }

                if (mRenderableListener)
                {
                        // Allow listener to override technique and to abort
                        if (!mRenderableListener->renderableQueued(pRend, groupID, priority, &pTech))
                                return; // rejected

                        // tell material it's been used (incase changed)
                        pTech->getParent()->touch();
                }
                
        pGroup->addRenderable(pRend, pTech, priority);

    }
    //-----------------------------------------------------------------------
    void RenderQueue::clear(bool destroyPassMaps)
    {
        // Clear the queues
        RenderQueueGroupMap::iterator i, iend;
        i = mGroups.begin();
        iend = mGroups.end();
        for (; i != iend; ++i)
        {
            i->second->clear(destroyPassMaps);
        }

        // Now trigger the pending pass updates
        Pass::processPendingPassUpdates();

        // NB this leaves the items present (but empty)
        // We're assuming that frame-by-frame, the same groups are likely to 
        //  be used, so no point destroying the vectors and incurring the overhead
        //  that would cause, let them be destroyed in the destructor.
    }
    //-----------------------------------------------------------------------
    RenderQueue::QueueGroupIterator RenderQueue::_getQueueGroupIterator(void)
    {
        return QueueGroupIterator(mGroups.begin(), mGroups.end());
    }
    //-----------------------------------------------------------------------
    void RenderQueue::addRenderable(Renderable* pRend, uint8 groupID)
    {
        addRenderable(pRend, groupID, mDefaultRenderablePriority);
    }
        //-----------------------------------------------------------------------
    void RenderQueue::addRenderable(Renderable* pRend)
    {
        addRenderable(pRend, mDefaultQueueGroup, mDefaultRenderablePriority);
    }
    //-----------------------------------------------------------------------
    uint8 RenderQueue::getDefaultQueueGroup(void) const
    {
        return mDefaultQueueGroup;
    }
    //-----------------------------------------------------------------------
    void RenderQueue::setDefaultQueueGroup(uint8 grp)
    {
        mDefaultQueueGroup = grp;
    }
    //-----------------------------------------------------------------------
    ushort RenderQueue::getDefaultRenderablePriority(void) const
    {
        return mDefaultRenderablePriority;
    }
    //-----------------------------------------------------------------------
    void RenderQueue::setDefaultRenderablePriority(ushort priority)
    {
        mDefaultRenderablePriority = priority;
    }
        
        
        //-----------------------------------------------------------------------
        RenderQueueGroup* RenderQueue::getQueueGroup(uint8 groupID)
        {
                // Find group
                RenderQueueGroupMap::iterator groupIt;
                RenderQueueGroup* pGroup;

                groupIt = mGroups.find(groupID);
                if (groupIt == mGroups.end())
                {
                        // Insert new
                        pGroup = new RenderQueueGroup(this,
                mSplitPassesByLightingType,
                mSplitNoShadowPasses,
                mShadowCastersCannotBeReceivers);
                        mGroups.insert(RenderQueueGroupMap::value_type(groupID, pGroup));
                }
                else
                {
                        pGroup = groupIt->second;
                }

                return pGroup;

        }
    //-----------------------------------------------------------------------
    void RenderQueue::setSplitPassesByLightingType(bool split)
    {
        mSplitPassesByLightingType = split;

        RenderQueueGroupMap::iterator i, iend;
        i = mGroups.begin();
        iend = mGroups.end();
        for (; i != iend; ++i)
        {
            i->second->setSplitPassesByLightingType(split);
        }
    }
    //-----------------------------------------------------------------------
    void RenderQueue::setSplitNoShadowPasses(bool split)
    {
        mSplitNoShadowPasses = split;

        RenderQueueGroupMap::iterator i, iend;
        i = mGroups.begin();
        iend = mGroups.end();
        for (; i != iend; ++i)
        {
            i->second->setSplitNoShadowPasses(split);
        }
    }
        //-----------------------------------------------------------------------
        void RenderQueue::setShadowCastersCannotBeReceivers(bool ind)
        {
                mShadowCastersCannotBeReceivers = ind;

                RenderQueueGroupMap::iterator i, iend;
                i = mGroups.begin();
                iend = mGroups.end();
                for (; i != iend; ++i)
                {
                        i->second->setShadowCastersCannotBeReceivers(ind);
                }
        }

}