Introduced new osg::View, and osg::RenderInfo classes into the core OSG to help
handle scenes with multiple views with elements that need coordinating on a per view basis. Added beginings of new osgText::FadeText class (not functionality yet).
This commit is contained in:
Robert Osfield
233
src/osgText/FadeText.cpp
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233
src/osgText/FadeText.cpp
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osgText/FadeText>
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#include <osg/Notify>
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#include <osg/io_utils>
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#include <OpenThreads/Mutex>
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#include <OpenThreads/ScopedLock>
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using namespace osgText;
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struct FadeTextUserData : public osg::Referenced
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{
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FadeTextUserData():
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_frameNumber(0) {}
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typedef std::list<FadeText*> FadeTextList;
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unsigned int _frameNumber;
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FadeTextList _fadeTextInView;
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};
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struct GlobalFadeText : public osg::Referenced
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{
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typedef std::set< osg::ref_ptr<FadeTextUserData> > UserDataSet;
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typedef std::set<FadeText*> FadeTextSet;
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typedef std::map<osg::View*, UserDataSet> ViewUserDataMap;
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typedef std::map<osg::View*, FadeTextSet> ViewFadeTextMap;
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GlobalFadeText():
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_frameNumber(0xffffffff)
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{
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}
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FadeTextUserData* createNewFadeTextUserData(osg::View* view)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex);
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FadeTextUserData* userData = new FadeTextUserData;
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if (!userData)
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{
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osg::notify(osg::NOTICE)<<"Memory error, unable to create FadeTextUserData."<<std::endl;
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return 0;
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}
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_viewMap[view].insert(userData);
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return userData;
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}
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void update(unsigned int frameNumber)
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{
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_frameNumber = frameNumber;
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osg::notify(osg::NOTICE)<<"New frame, updating GlobalFadeText structure."<<std::endl;
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for(GlobalFadeText::ViewUserDataMap::iterator vitr = _viewMap.begin();
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vitr != _viewMap.end();
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++vitr)
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{
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osg::View* view = vitr->first;
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FadeTextSet& fadeTextSet = _viewFadeTextMap[view];
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fadeTextSet.clear();
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for(GlobalFadeText::UserDataSet::iterator uitr = vitr->second.begin();
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uitr != vitr->second.end();
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++uitr)
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{
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FadeTextUserData* userData = uitr->get();
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int frameDelta = frameNumber - userData->_frameNumber;
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if (frameDelta<=1)
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{
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for(FadeTextUserData::FadeTextList::iterator fitr = userData->_fadeTextInView.begin();
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fitr != userData->_fadeTextInView.end();
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++fitr)
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{
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FadeText* fadeText = *fitr;
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fadeTextSet.insert(fadeText);
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}
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}
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}
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osg::notify(osg::NOTICE)<<" view="<<view<<"\tnumOfText="<<fadeTextSet.size()<<std::endl;
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}
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}
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inline void updateIfRequired(unsigned int frameNumber)
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{
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if (_frameNumber!=frameNumber) update(frameNumber);
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}
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unsigned int _frameNumber;
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OpenThreads::Mutex _mutex;
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ViewUserDataMap _viewMap;
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ViewFadeTextMap _viewFadeTextMap;
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};
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GlobalFadeText* getGlobalFadeText()
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{
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static osg::ref_ptr<GlobalFadeText> s_globalFadeText = new GlobalFadeText;
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return s_globalFadeText.get();
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}
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struct FadeTextUpdateCallback : public osg::Drawable::UpdateCallback
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{
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virtual void update(osg::NodeVisitor* nv, osg::Drawable* drawable)
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{
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osgText::FadeText* fadeText = dynamic_cast<osgText::FadeText*>(drawable);
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if (!fadeText) return;
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unsigned int frameNumber = nv->getFrameStamp()->getFrameNumber();
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osg::notify(osg::NOTICE)<<"Update FadeText "<<fadeText<<std::endl;
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typedef std::set<FadeText*> FadeTextSet;
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GlobalFadeText* gft = getGlobalFadeText();
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gft->updateIfRequired(frameNumber);
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osgText::FadeText::ViewBlendColourMap& vbcm = fadeText->getViewBlendColourMap();
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GlobalFadeText::ViewFadeTextMap& vftm = gft->_viewFadeTextMap;
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for(GlobalFadeText::ViewFadeTextMap::iterator itr = vftm.begin();
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itr != vftm.end();
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++itr)
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{
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osg::View* view = itr->first;
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FadeTextSet& fadeTextSet = itr->second;
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if (fadeTextSet.count(fadeText)==0)
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{
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osg::notify(osg::NOTICE)<<"Text "<<fadeText<<" not in "<<view<<std::endl;
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}
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else
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{
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osg::notify(osg::NOTICE)<<"Text "<<fadeText<<" is in "<<view<<std::endl;
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}
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osg::Vec4& tec = vbcm[view];
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tec.set(1.0f,1.0f,1.0f, 0.5f + 0.5f * sin( float(frameNumber)*0.1));
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}
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}
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};
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FadeText::FadeText()
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{
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init();
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}
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FadeText::FadeText(const Text& text,const osg::CopyOp& copyop):
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Text(text,copyop)
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{
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init();
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}
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void FadeText::init()
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{
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setUpdateCallback(new FadeTextUpdateCallback());
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}
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void FadeText::drawImplementation(osg::RenderInfo& renderInfo) const
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{
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ViewBlendColourMap::iterator itr = _viewBlendColourMap.find(renderInfo.getView());
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if (itr != _viewBlendColourMap.end())
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{
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Text::drawImplementation(*renderInfo.getState(), itr->second );
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}
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else
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{
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Text::drawImplementation(*renderInfo.getState(), osg::Vec4(1.0f,1.0f,1.0f,1.0f) );
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}
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// now pass on new details
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FadeTextUserData* userData = dynamic_cast<FadeTextUserData*>(renderInfo.getUserData());
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if (!userData)
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{
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if (renderInfo.getUserData())
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{
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osg::notify(osg::NOTICE)<<"Warning user data not of supported type."<<std::endl;
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return;
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}
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userData = getGlobalFadeText()->createNewFadeTextUserData(renderInfo.getView());
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if (!userData)
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{
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osg::notify(osg::NOTICE)<<"Memory error, unable to create FadeTextUserData."<<std::endl;
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return;
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}
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renderInfo.setUserData(userData);
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}
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unsigned int frameNumber = renderInfo.getState()->getFrameStamp()->getFrameNumber();
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if (frameNumber != userData->_frameNumber)
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{
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// new frame so must reset UserData structure.
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userData->_frameNumber = frameNumber;
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userData->_fadeTextInView.clear();
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}
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userData->_fadeTextInView.push_back(const_cast<osgText::FadeText*>(this));
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osgText::Text::AutoTransformCache& atc = _autoTransformCache[renderInfo.getContextID()];
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osg::Matrix& matrix = atc._matrix;
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osg::notify(osg::NOTICE)<<"cull Matrix = "<<matrix<<std::endl;
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}
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