One Month In Minsk. Made in Belarus.

1 files changed, 33 insertions, 0 deletions

diff --git a/indexer/mercator.hpp b/indexer/mercator.hpp
new file mode 100644
index 0000000000..21cabf7d99
--- /dev/null
+++ b/indexer/mercator.hpp
@@ -0,0 +1,33 @@
+#pragma once
+#include "../geometry/point2d.hpp"
+#include "../base/math.hpp"
+
+struct MercatorBounds
+{
+  static double minX;
+  static double maxX;
+  static double minY;
+  static double maxY;
+
+  inline static double YToLat(double y)
+  {
+    return my::RadToDeg(2.0 * atan(exp(my::DegToRad(y))) - math::pi / 2.0);
+  }
+
+  inline static double LatToY(double lat)
+  {
+    lat = my::clamp(lat, -86.0, 86.0);
+    double const res = my::RadToDeg(log(tan(my::DegToRad(45.0 + lat * 0.5))));
+    return my::clamp(res, -180.0, 180.0);
+  }
+
+  inline static double XToLon(double x)
+  {
+    return x;
+  }
+
+  inline static double LonToX(double lon)
+  {
+    return lon;
+  }
+};