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Further work on osgText::FadeText implementation.

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This commit is contained in:
Robert Osfield 2006-09-19 20:19:29 +00:00
parent 45dc4572a9
commit 87aff3d92c
3 changed files with 128 additions and 24 deletions
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2
examples/osgfadetext/osgfadetext.cpp
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@ -99,7 +99,7 @@ osg::Node* createFadeText(osg::EllipsoidModel* ellipsoid)
{
osg::Geode* geode = new osg::Geode;
osgText::Text* text = new osgText::Text;
osgText::FadeText* text = new osgText::FadeText;
text->setText("This is a test");
text->setFont("fonts/arial.ttf");

17
src/osgProducer/OsgCameraGroup.cpp
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@ -806,8 +806,23 @@ void OsgCameraGroup::frame()
osg::Node* node = getTopMostSceneData();
if (node) node->getBound();
if (_view.valid())
{
double left, right, bottom, top, nearClip, farClip;
getLensParams(left, right, bottom, top, nearClip, farClip);
if (getLensProjectionType()==Camera::Lens::Perspective)
{
_view->setProjectionMatrixAsFrustum(left, right, bottom, top, nearClip, farClip);
}
else
{
_view->setProjectionMatrixAsOrtho(left, right, bottom, top, nearClip, farClip);
}
_view->setViewMatrix(getViewMatrix());
}
// pass on the cull settings to the scene views to keep
// the settings in sync.
for(SceneHandlerList::iterator itr = _shvec.begin();
itr != _shvec.end();

129
src/osgText/FadeText.cpp
View File

@ -20,12 +20,59 @@
using namespace osgText;
struct FadeTextData : public osg::Referenced
{
FadeTextData(FadeText* fadeText=0):
_fadeText(fadeText),
_visible(true) {}
bool operator < (const FadeTextData& rhs) const
{
return _fadeText < rhs._fadeText;
}
float getNearestZ() const
{
float nearestZ = _vertices[0].z();
if (nearestZ > _vertices[1].z()) nearestZ = _vertices[1].z();
if (nearestZ > _vertices[2].z()) nearestZ = _vertices[2].z();
if (nearestZ > _vertices[3].z()) nearestZ = _vertices[3].z();
return nearestZ;
}
FadeText* _fadeText;
osg::Vec3 _vertices[4];
bool _visible;
};
struct FadeTextPolytopeData : public FadeTextData, public osg::Polytope
{
FadeTextPolytopeData(FadeTextData& fadeTextData):
FadeTextData(fadeTextData)
{
_referenceVertexList.push_back(_vertices[0]);
_referenceVertexList.push_back(_vertices[1]);
_referenceVertexList.push_back(_vertices[2]);
_referenceVertexList.push_back(_vertices[3]);
}
void buildPolytope()
{
osg::Vec3 edge01 = _vertices[1] - _vertices[0];
osg::Vec3 edge12 = _vertices[2] - _vertices[1];
osg::Vec3 edge23 = _vertices[3] - _vertices[2];
osg::Vec3 edge30 = _vertices[0] - _vertices[3];
osg::Vec3 normalFrontFace = edge01 ^ edge12;
}
};
struct FadeTextUserData : public osg::Referenced
{
FadeTextUserData():
_frameNumber(0) {}
typedef std::list<FadeText*> FadeTextList;
typedef std::list<FadeTextData> FadeTextList;
unsigned int _frameNumber;
FadeTextList _fadeTextInView;
};
@ -34,6 +81,7 @@ struct GlobalFadeText : public osg::Referenced
{
typedef std::set< osg::ref_ptr<FadeTextUserData> > UserDataSet;
typedef std::set<FadeText*> FadeTextSet;
typedef std::multimap<float, osg::ref_ptr<FadeTextPolytopeData> > FadeTextPolytopeMap;
typedef std::map<osg::View*, UserDataSet> ViewUserDataMap;
typedef std::map<osg::View*, FadeTextSet > ViewFadeTextMap;
@ -65,8 +113,6 @@ struct GlobalFadeText : public osg::Referenced
{
_frameNumber = frameNumber;
osg::notify(osg::NOTICE)<<"New frame, updating GlobalFadeText structure."<<std::endl;
for(GlobalFadeText::ViewUserDataMap::iterator vitr = _viewMap.begin();
vitr != _viewMap.end();
++vitr)
@ -77,6 +123,8 @@ struct GlobalFadeText : public osg::Referenced
FadeTextSet& fadeTextSet = _viewFadeTextMap[view];
fadeTextSet.clear();
FadeTextPolytopeMap fadeTextPolytopeMap;
for(GlobalFadeText::UserDataSet::iterator uitr = vitr->second.begin();
uitr != vitr->second.end();
++uitr)
@ -90,13 +138,23 @@ struct GlobalFadeText : public osg::Referenced
fitr != userData->_fadeTextInView.end();
++fitr)
{
FadeText* fadeText = *fitr;
fadeTextSet.insert(fadeText);
FadeTextData& fadeTextData = *fitr;
if (fadeTextSet.count(fadeTextData._fadeText)==0)
{
fadeTextSet.insert(fadeTextData._fadeText);
fadeTextPolytopeMap.insert(FadeTextPolytopeMap::value_type(
fadeTextData.getNearestZ(), new FadeTextPolytopeData(fadeTextData)));
}
}
}
}
osg::notify(osg::NOTICE)<<" view="<<view<<"\tnumOfText="<<fadeTextSet.size()<<std::endl;
// for each FadeTexPoltopeData
// create polytopes
// test against all FTPD's later in the list
// test all control points on FTPD against each plane of the current polytope
// if all control points removed or outside then disgard FTPD and make FT visible = false;
}
}
@ -120,6 +178,8 @@ GlobalFadeText* getGlobalFadeText()
struct FadeTextUpdateCallback : public osg::Drawable::UpdateCallback
{
FadeTextData _ftd;
virtual void update(osg::NodeVisitor* nv, osg::Drawable* drawable)
{
osgText::FadeText* fadeText = dynamic_cast<osgText::FadeText*>(drawable);
@ -127,33 +187,45 @@ struct FadeTextUpdateCallback : public osg::Drawable::UpdateCallback
unsigned int frameNumber = nv->getFrameStamp()->getFrameNumber();
osg::notify(osg::NOTICE)<<"Update FadeText "<<fadeText<<std::endl;
typedef std::set<FadeText*> FadeTextSet;
GlobalFadeText* gft = getGlobalFadeText();
gft->updateIfRequired(frameNumber);
osgText::FadeText::ViewBlendColourMap& vbcm = fadeText->getViewBlendColourMap();
_ftd._fadeText = fadeText;
float fadeSpeed = 0.01f;
GlobalFadeText::ViewFadeTextMap& vftm = gft->_viewFadeTextMap;
for(GlobalFadeText::ViewFadeTextMap::iterator itr = vftm.begin();
itr != vftm.end();
++itr)
{
osg::View* view = itr->first;
FadeTextSet& fadeTextSet = itr->second;
if (fadeTextSet.count(fadeText)==0)
GlobalFadeText::FadeTextSet& fadeTextSet = itr->second;
bool visible = fadeTextSet.count(fadeText)!=0;
osg::Vec4& tec = vbcm[view];
tec[0] = 1.0f;
tec[1] = 1.0f;
tec[2] = 1.0f;
if (visible)
{
osg::notify(osg::NOTICE)<<"Text "<<fadeText<<" not in "<<view<<std::endl;
if (tec[3]<1.0f)
{
tec[3] += fadeSpeed;
if (tec[3]>1.0f) tec[3] = 1.0f;
}
}
else
{
osg::notify(osg::NOTICE)<<"Text "<<fadeText<<" is in "<<view<<std::endl;
if (tec[3]>0.0f)
{
tec[3] -= fadeSpeed;
if (tec[3]<0.0f) tec[3] = 0.0f;
}
}
osg::Vec4& tec = vbcm[view];
tec.set(1.0f,1.0f,1.0f, 0.5f + 0.5f * sin( float(frameNumber)*0.1));
}
}
@ -181,6 +253,8 @@ void FadeText::init()
void FadeText::drawImplementation(osg::RenderInfo& renderInfo) const
{
osg::State& state = *renderInfo.getState();
ViewBlendColourMap::iterator itr = _viewBlendColourMap.find(renderInfo.getView());
if (itr != _viewBlendColourMap.end())
{
@ -222,12 +296,27 @@ void FadeText::drawImplementation(osg::RenderInfo& renderInfo) const
userData->_fadeTextInView.clear();
}
userData->_fadeTextInView.push_back(const_cast<osgText::FadeText*>(this));
osgText::Text::AutoTransformCache& atc = _autoTransformCache[renderInfo.getContextID()];
osg::Matrix& matrix = atc._matrix;
osg::notify(osg::NOTICE)<<"cull Matrix = "<<matrix<<std::endl;
osg::Matrix lmv = atc._matrix;
lmv.postMult(state.getModelViewMatrix());
if (renderInfo.getView())
{
// move from camera into the view space.
lmv.postMult(state.getInitialInverseViewMatrix());
lmv.postMult(renderInfo.getView()->getViewMatrix());
lmv.postMult(renderInfo.getView()->getProjectionMatrix());
}
FadeTextData ftd(const_cast<osgText::FadeText*>(this));
ftd._vertices[0].set(osg::Vec3(_textBB.xMin(),_textBB.yMin(),_textBB.zMin())*lmv);
ftd._vertices[1].set(osg::Vec3(_textBB.xMax(),_textBB.yMin(),_textBB.zMin())*lmv);
ftd._vertices[2].set(osg::Vec3(_textBB.xMax(),_textBB.yMax(),_textBB.zMin())*lmv);
ftd._vertices[3].set(osg::Vec3(_textBB.xMin(),_textBB.yMax(),_textBB.zMin())*lmv);
userData->_fadeTextInView.push_back(ftd);
}