Make ComputeAngle a free standing function

src/extractor/edge_based_graph_factory.cpp

@@ -468,7 +468,7 @@ void EdgeBasedGraphFactory::GenerateEdgeExpandedEdges(
                                           ? m_compressed_edge_container.GetFirstEdgeTargetID(e2)
                                           : node_w)];
 
-                const double turn_angle = util::ComputeAngle::OfThreeFixedPointCoordinates(
+                const double turn_angle = util::ComputeAngle(
                     first_coordinate, m_node_info_list[node_v], third_coordinate);
 
                 const int turn_penalty = GetTurnPenalty(turn_angle, lua_state);

src/util/compute_angle.cpp

@@ -1,34 +0,0 @@
-#include "util/compute_angle.hpp"
-
-#include "util/trigonometry_table.hpp"
-#include "util/mercator.hpp"
-
-#include "osrm/coordinate.hpp"
-
-#include <cmath>
-
-namespace osrm
-{
-namespace util
-{
-
-double ComputeAngle::OfThreeFixedPointCoordinates(const FixedPointCoordinate &first,
-                                                  const FixedPointCoordinate &second,
-                                                  const FixedPointCoordinate &third) noexcept
-{
-    const double v1x = (first.lon - second.lon) / COORDINATE_PRECISION;
-    const double v1y = mercator::lat2y(first.lat / COORDINATE_PRECISION) -
-                       mercator::lat2y(second.lat / COORDINATE_PRECISION);
-    const double v2x = (third.lon - second.lon) / COORDINATE_PRECISION;
-    const double v2y = mercator::lat2y(third.lat / COORDINATE_PRECISION) -
-                       mercator::lat2y(second.lat / COORDINATE_PRECISION);
-
-    double angle = (atan2_lookup(v2y, v2x) - atan2_lookup(v1y, v1x)) * 180. / M_PI;
-    while (angle < 0.)
-    {
-        angle += 360.;
-    }
-    return angle;
-}
-}
-}