void
decimatePart( GeoPointList& input, double threshold, int min_points, GeoPartList& output )
{
GeoPointList new_part;
GeoPoint last_point;
double t2 = threshold * threshold;
if ( input.size() >= min_points )
{
for( GeoPointList::iterator i = input.begin(); i != input.end(); i++ )
{
if ( i == input.begin() )// || i == input.end()-1 )
{
last_point = *i;
new_part.push_back( *i );
}
else
{
double d2 = (*i - last_point).length2();
if ( d2 > t2 )
{
new_part.push_back( *i );
last_point = *i;
}
}
}
if ( new_part.size() >= min_points )
{
output.push_back( new_part );
}
}
}
osg::Node* FeatureLabelLayer::createNode(const TerrainTile* tile, Feature* f)
{
//
osg::MatrixTransform* mt = new osg::MatrixTransform;
//
GeoShapeList shapes = f->getShapes();
GeoPointList points = shapes[0].getPart(0);
double lon,lat,h;
osg::Vec3d start, end, pos;
const SpatialReference* srs = getSP()->getSrs();
const SpatialReference* tile_srs = tile->getSP()->getSrs();
std::vector<osg::Vec3d> ins;
ins.insert(ins.begin(), points.begin(), points.end());
if(!srs->isEquivalentTo(tile_srs))
{
srs->transformPoints(tile_srs, &ins);
}
//
lon = osg::DegreesToRadians(ins[0]._v[0]);
lat = osg::DegreesToRadians(ins[0]._v[1]);
h = ins[0]._v[2];
if(_on_ground)
{
srs->getEllipsoid()->convertLatLongHeightToXYZ(lat, lon, h+10000.0,start._v[0], start._v[1], start._v[2]);
srs->getEllipsoid()->convertLatLongHeightToXYZ(lat, lon, h-10000.0,end._v[0], end._v[1], end._v[2]);
tile->genIntersectPoint(start, end, pos);
}
else
{
srs->getEllipsoid()->convertLatLongHeightToXYZ(lat, lon, h+100,pos._v[0], pos._v[1], pos._v[2]);
}
mt->setMatrix(osg::Matrix::translate(pos));
osg::Geode* _geode= new osg::Geode;
osgText::Text* text = new osgText::Text;
std::string name= f->getAttribute(_key).asString();
wchar_t wtext[1024] = {0};
int charcount = MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, (char*)(name.c_str()), name.length(), wtext, 1024);
text->setFont(_font_name);
text->setCharacterSize(_font_size);
if (_size_mode == OBJECT_SIZE)
{
text->setCharacterSizeMode(osgText::Text::OBJECT_COORDS_WITH_MAXIMUM_SCREEN_SIZE_CAPPED_BY_FONT_HEIGHT);
}
else
{
text->setCharacterSizeMode(osgText::Text::SCREEN_COORDS);
}
text->setPosition(Vec3(0.0,0.0,0.0));
text->setAlignment(osgText::TextBase::LEFT_BOTTOM);
text->setAxisAlignment(osgText::Text::SCREEN);
text->setText(wtext);
text->setName(name.c_str());
text->setColor(_color);
_geode->addDrawable(text);
mt->addChild(_geode);
return mt;
}