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#include "feature_utils.hpp"
#include "classificator.hpp"
#include "../geometry/point2d.hpp"
#include "../base/base.hpp"
#include "../std/vector.hpp"
namespace
{
class FeatureViewportEstimator
{
public:
FeatureViewportEstimator()
{
m_TypeContinent = GetType("place", "continent");
m_TypeCountry = GetType("place", "country");
m_TypeCity = GetType("place", "city");
m_TypeCityCapital = GetType("place", "city", "capital");
m_TypeTown = GetType("place", "town");
m_TypeVillage = GetType("place", "village");
}
m2::RectD GetViewport(FeatureType const & feature) const
{
m2::RectD limitRect = feature.GetLimitRect(-2);
if (feature.GetFeatureType() != feature::GEOM_POINT)
return limitRect;
m2::PointD maxSizeMeters(100, 100);
FeatureBase::GetTypesFn types;
feature.ForEachTypeRef(types);
for (size_t i = 0; i < types.m_size; ++i)
{
m2::PointD const sizeMeters = GetSizeForType(types.m_types[i], feature);
maxSizeMeters.x = max(maxSizeMeters.x, sizeMeters.x);
maxSizeMeters.y = max(maxSizeMeters.y, sizeMeters.y);
}
m2::PointD const centerXY = limitRect.Center();
return MercatorBounds::RectByCenterXYAndSizeInMeters(centerXY.x, centerXY.y,
maxSizeMeters.x, maxSizeMeters.y);
}
// Returns width and height (lon and lat) for a given type.
m2::PointD GetSizeForType(uint32_t const type, FeatureType const & feature) const
{
static double const km = 1000.0;
if (type == m_TypeContinent)
return m2::PointD(5000*km, 5000*km);
/// @todo Load countries bounding rects.
if (type == m_TypeCountry)
return m2::PointD(500*km, 500*km);
if (type == m_TypeCity || type == m_TypeCityCapital)
{
double const radius = sqrt(static_cast<double>(feature.GetPopulation() / 3000));
return m2::PointD(radius*km, radius*km);
}
if (type == m_TypeTown)
return m2::PointD(8*km, 8*km);
if (type == m_TypeVillage)
return m2::PointD(3*km, 3*km);
return m2::PointD(0, 0);
}
private:
static uint32_t GetType(string const & s1,
string const & s2 = string(),
string const & s3 = string())
{
vector<string> path;
path.push_back(s1);
if (!s2.empty()) path.push_back(s2);
if (!s3.empty()) path.push_back(s3);
return classif().GetTypeByPath(path);
}
uint32_t m_TypeContinent;
uint32_t m_TypeCountry;
uint32_t m_TypeCity;
uint32_t m_TypeCityCapital;
uint32_t m_TypeTown;
uint32_t m_TypeVillage;
};
} // unnamed namespace
m2::RectD feature::GetFeatureViewport(FeatureType const & feature)
{
static FeatureViewportEstimator const featureViewportEstimator;
return featureViewportEstimator.GetViewport(feature);
}
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