100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
|
#ifndef ENGINE_GUIDANCE_ASSEMBLE_OVERVIEW_HPP
|
||
|
|
#define ENGINE_GUIDANCE_ASSEMBLE_OVERVIEW_HPP
|
||
|
|
|
||
|
|
#include "engine/guidance/leg_geometry.hpp"
|
||
|
|
#include "engine/douglas_peucker.hpp"
|
||
|
|
#include "util/tiles.hpp"
|
||
|
|
|
||
|
|
#include <vector>
|
||
|
|
#include <tuple>
|
||
|
|
|
||
|
|
namespace osrm
|
||
|
|
{
|
||
|
|
namespace engine
|
||
|
|
{
|
||
|
|
namespace guidance
|
||
|
|
{
|
||
|
|
namespace
|
||
|
|
{
|
||
|
|
|
||
|
|
unsigned calculateOverviewZoomLevel(const std::vector<LegGeometry> &leg_geometries)
|
||
|
|
{
|
||
|
|
int min_lon = std::numeric_limits<int>::max();
|
||
|
|
int min_lat = std::numeric_limits<int>::max();
|
||
|
|
int max_lon = -std::numeric_limits<int>::max();
|
||
|
|
int max_lat = -std::numeric_limits<int>::max();
|
||
|
|
|
||
|
|
for (const auto &leg_geometry : leg_geometries)
|
||
|
|
{
|
||
|
|
for (const auto coord : leg_geometry.locations)
|
||
|
|
{
|
||
|
|
min_lon = std::min(min_lon, coord.lon);
|
||
|
|
max_lon = std::max(max_lon, coord.lon);
|
||
|
|
min_lat = std::min(min_lat, coord.lat);
|
||
|
|
max_lat = std::max(max_lat, coord.lat);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return util::tiles::getBBMaxZoomTile(min_lon, min_lat, max_lon, max_lat).z;
|
||
|
|
}
|
||
|
|
|
||
|
|
std::vector<util::FixedPointCoordinate> simplifyGeometry(const std::vector<LegGeometry> &leg_geometries, const unsigned zoom_level)
|
||
|
|
{
|
||
|
|
std::vector<util::FixedPointCoordinate> overview_geometry;
|
||
|
|
auto leg_index = 0UL;
|
||
|
|
for (const auto geometry : leg_geometries)
|
||
|
|
{
|
||
|
|
auto simplified_geometry =
|
||
|
|
douglasPeucker(geometry.locations.begin(), geometry.locations.end(), zoom_level);
|
||
|
|
// not the last leg
|
||
|
|
if (leg_index < leg_geometries.size() - 1)
|
||
|
|
{
|
||
|
|
simplified_geometry.pop_back();
|
||
|
|
}
|
||
|
|
overview_geometry.insert(overview_geometry.end(), simplified_geometry.begin(),
|
||
|
|
simplified_geometry.end());
|
||
|
|
}
|
||
|
|
return overview_geometry;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
std::vector<util::FixedPointCoordinate>
|
||
|
|
assembleOverview(const std::vector<LegGeometry> &leg_geometries, const bool use_simplification)
|
||
|
|
{
|
||
|
|
if (use_simplification)
|
||
|
|
{
|
||
|
|
const auto zoom_level = calculateOverviewZoomLevel(leg_geometries);
|
||
|
|
return simplifyGeometry(leg_geometries, zoom_level);
|
||
|
|
}
|
||
|
|
BOOST_ASSERT(!use_simplification);
|
||
|
|
|
||
|
|
auto overview_size = std::accumulate(leg_geometries.begin(), leg_geometries.end(), 0,
|
||
|
|
[](const std::size_t sum, const LegGeometry &leg_geometry)
|
||
|
|
{
|
||
|
|
return sum + leg_geometry.locations.size();
|
||
|
|
}) -
|
||
|
|
leg_geometries.size() + 1;
|
||
|
|
std::vector<util::FixedPointCoordinate> overview_geometry;
|
||
|
|
overview_geometry.reserve(overview_size);
|
||
|
|
|
||
|
|
auto leg_index = 0UL;
|
||
|
|
for (const auto geometry : leg_geometries)
|
||
|
|
{
|
||
|
|
auto begin = geometry.locations.begin();
|
||
|
|
auto end = geometry.locations.end();
|
||
|
|
if (leg_index < leg_geometries.size() - 1)
|
||
|
|
{
|
||
|
|
end = std::prev(end);
|
||
|
|
}
|
||
|
|
overview_geometry.insert(overview_geometry.end(), begin, end);
|
||
|
|
}
|
||
|
|
|
||
|
|
return overview_geometry;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace guidance
|
||
|
|
} // namespace engine
|
||
|
|
} // namespace osrm
|
||
|
|
|
||
|
|
#endif
|