FM / util

/srv/osrm/osrm-backend/include/util

Name	Size	Mode	Actions
guidance/	-	0755	rm
alias.hpp	6870	0644	edit dl rm
assert.hpp	1964	0644	edit dl rm
attributes.hpp	357	0644	edit dl rm
bearing.hpp	3964	0644	edit dl rm
bit_range.hpp	2950	0644	edit dl rm
cheap_ruler.hpp	2124	0644	edit dl rm
concurrent_id_map.hpp	2148	0644	edit dl rm
conditional_restrictions.hpp	627	0644	edit dl rm
connectivity_checksum.hpp	1931	0644	edit dl rm
coordinate.hpp	9244	0644	edit dl rm
coordinate_calculation.hpp	16297	0644	edit dl rm
deallocating_vector.hpp	11205	0644	edit dl rm
debug.hpp	5958	0644	edit dl rm
dist_table_wrapper.hpp	2299	0644	edit dl rm
dynamic_graph.hpp	15951	0644	edit dl rm
exception.hpp	5126	0644	edit dl rm
exception_utils.hpp	609	0644	edit dl rm
exclude_flag.hpp	975	0644	edit dl rm
filtered_graph.hpp	5402	0644	edit dl rm
filtered_integer_range.hpp	3097	0644	edit dl rm
fingerprint.hpp	1166	0644	edit dl rm
for_each_indexed.hpp	634	0644	edit dl rm
for_each_pair.hpp	990	0644	edit dl rm
for_each_range.hpp	477	0644	edit dl rm
geojson_debug_logger.hpp	6330	0644	edit dl rm
geojson_debug_policies.hpp	1810	0644	edit dl rm
geojson_debug_policy_toolkit.hpp	3258	0644	edit dl rm
geojson_validation.hpp	2899	0644	edit dl rm
graph_traits.hpp	1245	0644	edit dl rm
graph_utils.hpp	3141	0644	edit dl rm
group_by.hpp	722	0644	edit dl rm
hilbert_value.hpp	3010	0644	edit dl rm
indexed_data.hpp	15039	0644	edit dl rm
integer_range.hpp	3286	0644	edit dl rm
isatty.hpp	610	0644	edit dl rm
json_container.hpp	3181	0644	edit dl rm
json_deep_compare.hpp	4732	0644	edit dl rm
json_renderer.hpp	4160	0644	edit dl rm
json_util.hpp	544	0644	edit dl rm
log.hpp	2187	0644	edit dl rm
lua_util.hpp	891	0644	edit dl rm
matrix_graph_wrapper.hpp	1294	0644	edit dl rm
meminfo.hpp	660	0644	edit dl rm
mmap_file.hpp	2776	0644	edit dl rm
mmap_tar.hpp	1007	0644	edit dl rm
msb.hpp	1178	0644	edit dl rm
node_based_graph.hpp	3530	0644	edit dl rm
opening_hours.hpp	8338	0644	edit dl rm
packed_vector.hpp	21691	0644	edit dl rm
percent.hpp	2106	0644	edit dl rm
permutation.hpp	1991	0644	edit dl rm
query_heap.hpp	10205	0644	edit dl rm
range_table.hpp	7119	0644	edit dl rm
rectangle.hpp	5900	0644	edit dl rm
serialization.hpp	5902	0644	edit dl rm
static_assert.hpp	640	0644	edit dl rm
static_graph.hpp	10702	0644	edit dl rm
static_rtree.hpp	34147	0644	edit dl rm
std_hash.hpp	1035	0644	edit dl rm
string_util.hpp	3400	0644	edit dl rm
tarjan_scc.hpp	6646	0644	edit dl rm
timed_histogram.hpp	2576	0644	edit dl rm
timezones.hpp	1417	0644	edit dl rm
timing_util.hpp	1485	0644	edit dl rm
to_osm_link.hpp	694	0644	edit dl rm
trigonometry_table.hpp	35906	0644	edit dl rm
typedefs.hpp	7627	0644	edit dl rm
vector_tile.hpp	303	0644	edit dl rm
vector_view.hpp	8000	0644	edit dl rm
version.hpp.in	406	0644	edit dl rm
viewport.hpp	1579	0644	edit dl rm
web_mercator.hpp	6480	0644	edit dl rm
xor_fast_hash.hpp	1797	0644	edit dl rm
xor_fast_hash_storage.hpp	2195	0644	edit dl rm

Edit: /srv/osrm/osrm-backend/include/util/viewport.hpp (1579B)

#ifndef UTIL_VIEWPORT_HPP
#define UTIL_VIEWPORT_HPP

#include "util/coordinate.hpp"
#include "util/web_mercator.hpp"

#include <boost/assert.hpp>

#include <cmath>
#include <tuple>

// Port of https://github.com/mapbox/geo-viewport

namespace osrm::util::viewport
{

namespace detail
{
static constexpr unsigned MAX_ZOOM = 18;
static constexpr unsigned MIN_ZOOM = 1;
// this is an upper bound to current display sizes
static constexpr double VIEWPORT_WIDTH = 8 * web_mercator::TILE_SIZE;
static constexpr double VIEWPORT_HEIGHT = 5 * web_mercator::TILE_SIZE;
static const double INV_LOG_2 = 1. / std::log(2);
} // namespace detail

inline unsigned getFittedZoom(util::Coordinate south_west, util::Coordinate north_east)
{
    const auto min_x = web_mercator::degreeToPixel(toFloating(south_west.lon), detail::MAX_ZOOM);
    const auto max_y = web_mercator::degreeToPixel(toFloating(south_west.lat), detail::MAX_ZOOM);
    const auto max_x = web_mercator::degreeToPixel(toFloating(north_east.lon), detail::MAX_ZOOM);
    const auto min_y = web_mercator::degreeToPixel(toFloating(north_east.lat), detail::MAX_ZOOM);
    const double width_ratio = (max_x - min_x) / detail::VIEWPORT_WIDTH;
    const double height_ratio = (max_y - min_y) / detail::VIEWPORT_HEIGHT;
    const auto zoom = detail::MAX_ZOOM -
                      std::max(std::log(width_ratio), std::log(height_ratio)) * detail::INV_LOG_2;

if (std::isfinite(zoom))
        return std::max<unsigned>(detail::MIN_ZOOM, zoom);
    else
        return detail::MIN_ZOOM;
}
} // namespace osrm::util::viewport

#endif

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