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Further work on fade text.

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This commit is contained in:
Robert Osfield 2006-09-19 22:57:23 +00:00
parent 87aff3d92c
commit 5cab53941f
1 changed files with 125 additions and 9 deletions
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134
src/osgText/FadeText.cpp
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@ -34,9 +34,9 @@ struct FadeTextData : public osg::Referenced
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();
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;
}
@ -55,6 +55,14 @@ struct FadeTextPolytopeData : public FadeTextData, public osg::Polytope
_referenceVertexList.push_back(_vertices[2]);
_referenceVertexList.push_back(_vertices[3]);
}
void addEdgePlane(const osg::Vec3& corner, const osg::Vec3& edge)
{
osg::Vec3 normal( edge.y(), -edge.x(), 0.0f);
normal.normalize();
add(osg::Plane(normal, corner));
}
void buildPolytope()
{
@ -62,7 +70,63 @@ struct FadeTextPolytopeData : public FadeTextData, public osg::Polytope
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;
bool needToFlip = normalFrontFace.z()>0.0f;
normalFrontFace.normalize();
add(osg::Plane(normalFrontFace, _vertices[0]));
addEdgePlane(_vertices[0], edge01);
addEdgePlane(_vertices[1], edge12);
addEdgePlane(_vertices[2], edge23);
addEdgePlane(_vertices[3], edge30);
osg::notify(osg::NOTICE)<<" normalFrontFace = "<<normalFrontFace<<std::endl;
osg::notify(osg::NOTICE)<<" edge01 = "<<edge01<<std::endl;
osg::notify(osg::NOTICE)<<" edge12 = "<<edge12<<std::endl;
osg::notify(osg::NOTICE)<<" edge23 = "<<edge23<<std::endl;
osg::notify(osg::NOTICE)<<" _vertices[0]= "<<_vertices[0]<<std::endl;
osg::notify(osg::NOTICE)<<" _vertices[1]= "<<_vertices[1]<<std::endl;
osg::notify(osg::NOTICE)<<" _vertices[2]= "<<_vertices[2]<<std::endl;
osg::notify(osg::NOTICE)<<" _vertices[3]= "<<_vertices[3]<<std::endl;
if (needToFlip) flip();
osg::notify(osg::NOTICE)<<" plane 0 "<< _planeList[0]<<std::endl;
osg::notify(osg::NOTICE)<<" plane 1 "<< _planeList[1]<<std::endl;
osg::notify(osg::NOTICE)<<" plane 2 "<< _planeList[2]<<std::endl;
osg::notify(osg::NOTICE)<<" plane 3 "<< _planeList[3]<<std::endl;
osg::notify(osg::NOTICE)<<" plane 4 "<< _planeList[4]<<std::endl;
}
inline bool contains(const std::vector<osg::Vec3>& vertices)
{
for(std::vector<osg::Vec3>::const_iterator itr = vertices.begin();
itr != vertices.end();
++itr)
{
osg::notify(osg::NOTICE)<<"testing "<<*itr<<std::endl;
}
for(std::vector<osg::Vec3>::const_iterator itr = vertices.begin();
itr != vertices.end();
++itr)
{
if (osg::Polytope::contains(*itr))
{
osg::notify(osg::NOTICE)<<"Does contain "<<*itr<<std::endl;
return true;
}
else
{
osg::notify(osg::NOTICE)<<"Doesn't contain "<<*itr<<std::endl;
}
}
return false;
}
};
@ -111,6 +175,8 @@ struct GlobalFadeText : public osg::Referenced
void update(unsigned int frameNumber)
{
osg::notify(osg::NOTICE)<<std::endl<<"update**********************"<<std::endl;
_frameNumber = frameNumber;
for(GlobalFadeText::ViewUserDataMap::iterator vitr = _viewMap.begin();
@ -143,7 +209,7 @@ struct GlobalFadeText : public osg::Referenced
{
fadeTextSet.insert(fadeTextData._fadeText);
fadeTextPolytopeMap.insert(FadeTextPolytopeMap::value_type(
fadeTextData.getNearestZ(), new FadeTextPolytopeData(fadeTextData)));
-fadeTextData.getNearestZ(), new FadeTextPolytopeData(fadeTextData)));
}
}
}
@ -153,8 +219,51 @@ struct GlobalFadeText : public osg::Referenced
// 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;
// if all control points removed or outside then discard FTPD and make FT visible = false;
FadeTextPolytopeMap::iterator outer_itr = fadeTextPolytopeMap.begin();
while (outer_itr != fadeTextPolytopeMap.end())
{
FadeTextPolytopeMap::iterator inner_itr = outer_itr;
++inner_itr;
if (inner_itr == fadeTextPolytopeMap.end()) break;
FadeTextPolytopeData& outer_ftpm = *(outer_itr->second);
outer_ftpm.buildPolytope();
osg::notify(osg::NOTICE)<<"Outer z "<<outer_ftpm.getNearestZ()<<std::endl;
while(inner_itr != fadeTextPolytopeMap.end())
{
FadeTextPolytopeData& inner_ftpm = *(inner_itr->second);
osg::notify(osg::NOTICE)<<"Inner z "<<inner_ftpm.getNearestZ()<<std::endl;
if (outer_ftpm.contains(inner_ftpm.getReferenceVertexList()))
{
FadeTextPolytopeMap::iterator erase_itr = inner_itr;
// move to next ftpm
++inner_itr;
fadeTextSet.erase(inner_ftpm._fadeText);
// need to remove inner_ftpm as its occluded.
fadeTextPolytopeMap.erase(erase_itr);
}
else
{
// move to next ftpm
++inner_itr;
}
}
++outer_itr;
}
osg::notify(osg::NOTICE)<<"fadeTextPolytopeMap.size() = "<<fadeTextPolytopeMap.size()<<std::endl;
}
}
@ -309,13 +418,20 @@ void FadeText::drawImplementation(osg::RenderInfo& renderInfo) const
lmv.postMult(state.getInitialInverseViewMatrix());
lmv.postMult(renderInfo.getView()->getViewMatrix());
lmv.postMult(renderInfo.getView()->getProjectionMatrix());
osg::notify(osg::NOTICE)<<"renderInfo.getView()->getProjectionMatrix())="<<renderInfo.getView()->getProjectionMatrix()<<std::endl;
osg::notify(osg::NOTICE)<<"lmv="<<lmv<<std::endl;
}
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);
osg::notify(osg::NOTICE)<<"osg::Vec3d(_textBB.xMin(),_textBB.yMin(),_textBB.zMin())*lmv="<<osg::Vec3d(_textBB.xMin(),_textBB.yMin(),_textBB.zMin())*lmv<<std::endl;
osg::notify(osg::NOTICE)<<"osg::Vec4d(_textBB.xMin(),_textBB.yMin(),_textBB.zMin(),1.0)*lmv="<<osg::Vec4d(_textBB.xMin(),_textBB.yMin(),_textBB.zMin(),1.0)*lmv<<std::endl;
ftd._vertices[0].set(osg::Vec3d(_textBB.xMin(),_textBB.yMin(),_textBB.zMin())*lmv);
ftd._vertices[1].set(osg::Vec3d(_textBB.xMax(),_textBB.yMin(),_textBB.zMin())*lmv);
ftd._vertices[2].set(osg::Vec3d(_textBB.xMax(),_textBB.yMax(),_textBB.zMin())*lmv);
ftd._vertices[3].set(osg::Vec3d(_textBB.xMin(),_textBB.yMax(),_textBB.zMin())*lmv);
userData->_fadeTextInView.push_back(ftd);