| Subject: | [PATCH] Give angle from London in degrees too |
The example needs to output degrees also. Because:
1. Initial input was in degrees, not radians.
2. Nobody uses radian when discussing geography. Only degrees.
--- /usr/share/perl/5.26.0/Math/Trig.pm 2017-09-12 23:07:07.000000000 +0800
+++ /tmp/Trig.pm 2017-09-22 19:46:00.234885768 +0800
@@ -660,9 +660,10 @@
The direction you would have to go from London to Tokyo (in radians,
straight north being zero, straight east being pi/2).
- use Math::Trig qw(great_circle_direction);
+ use Math::Trig qw(great_circle_direction rad2deg);
my $rad = great_circle_direction(@L, @T); # About 0.547 or 0.174 pi.
+ my $deg = rad2deg($rad); # 31.32 degrees east of north.
The midpoint between London and Tokyo being