Open-Harbor/osrm-backend
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 3 Wiki Activity

Inline mercator transformations; no need for separate translation unit

Browse Source
This commit is contained in:
Daniel J. Hofmann
2016-01-11 14:06:49 +01:00
committed by Patrick Niklaus
parent 05658aeb3b
commit f875e26fbf
5 changed files with 23 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/util/coordinate_calculation.cpp
+4 -4
View File
@@ -102,7 +102,7 @@ double perpendicularDistance(const FixedPointCoordinate &segment_source,
{
return perpendicularDistanceFromProjectedCoordinate(
segment_source, segment_target, query_location,
{mercator::lat2y(query_location.lat / COORDINATE_PRECISION),
{mercator::latToY(query_location.lat / COORDINATE_PRECISION),
query_location.lon / COORDINATE_PRECISION},
nearest_location, ratio);
}
@@ -134,9 +134,9 @@ perpendicularDistanceFromProjectedCoordinate(const FixedPointCoordinate &segment
// initialize values
const double x = projected_coordinate.first;
const double y = projected_coordinate.second;
const double a = mercator::lat2y(segment_source.lat / COORDINATE_PRECISION);
const double a = mercator::latToY(segment_source.lat / COORDINATE_PRECISION);
const double b = segment_source.lon / COORDINATE_PRECISION;
const double c = mercator::lat2y(segment_target.lat / COORDINATE_PRECISION);
const double c = mercator::latToY(segment_target.lat / COORDINATE_PRECISION);
const double d = segment_target.lon / COORDINATE_PRECISION;
double p, q /*,mX*/, new_y;
if (std::abs(a - c) > std::numeric_limits<double>::epsilon())
@@ -190,7 +190,7 @@ perpendicularDistanceFromProjectedCoordinate(const FixedPointCoordinate &segment
else
{
// point lies in between
nearest_location.lat = static_cast<int>(mercator::y2lat(p) * COORDINATE_PRECISION);
nearest_location.lat = static_cast<int>(mercator::yToLat(p) * COORDINATE_PRECISION);
nearest_location.lon = static_cast<int>(q * COORDINATE_PRECISION);
}
BOOST_ASSERT(nearest_location.IsValid());
src/util/mercator.cpp
-10
View File
@@ -6,15 +6,5 @@ namespace osrm
{
namespace util
{
double mercator::y2lat(const double value) noexcept
{
return 180. * M_1_PI * (2. * std::atan(std::exp(value * M_PI / 180.)) - M_PI_2);
}
double mercator::lat2y(const double latitude) noexcept
{
return 180. * M_1_PI * std::log(std::tan(M_PI_4 + latitude * (M_PI / 180.) / 2.));
}
}
}