ogre_render_queue_clearer.cpp

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/*
 * Copyright (c) 2012, Willow Garage, Inc.
 * All rights reserved.
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 *     * Neither the name of the Willow Garage, Inc. nor the names of its
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 *       this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#include "ogre_render_queue_clearer.h"

#include <OGRE/OgreRoot.h>
#include <OGRE/OgrePass.h>

namespace rviz
{

OgreRenderQueueClearer::OgreRenderQueueClearer() {
        // TODO Auto-generated constructor stub

}

OgreRenderQueueClearer::~OgreRenderQueueClearer() {
        // TODO Auto-generated destructor stub
}


bool OgreRenderQueueClearer::frameStarted (const Ogre::FrameEvent &evt)
{
        // Workaround taken from http://www.ogre3d.org/mantis/view.php?id=130
        // in case a plugin creates its own scene manager.
        //
        // Has the following modifications:
        // 1. Need to pass 'true' to RenderQueue::clear( bool destroyPassMaps ).
        // 2. Don't need to call Ogre::Pass::processPendingPassUpdates(),
        //    since this is done within RenderQueue::clear().

        // This workaround is only necessary if there is more than one
        // scene manager present, so check for that
        Ogre::SceneManagerEnumerator::SceneManagerIterator it = Ogre::Root::getSingletonPtr()->getSceneManagerIterator();
        it.getNext();
        if ( !it.hasMoreElements() )
        {
                return true;
        }

        it = Ogre::Root::getSingletonPtr()->getSceneManagerIterator();
        while ( it.hasMoreElements() )
        {
                it.getNext()->getRenderQueue()->clear( true );
        }
        return true;
}

}