From 3ce34980d7ba2bddbf3e9a1bd6f98cbc855bddc2 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Sat, 19 Oct 2024 18:21:54 +0200 Subject: First commit MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- libtellurian_coarse_distance_radians.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 libtellurian_coarse_distance_radians.c (limited to 'libtellurian_coarse_distance_radians.c') diff --git a/libtellurian_coarse_distance_radians.c b/libtellurian_coarse_distance_radians.c new file mode 100644 index 0000000..eb9cac0 --- /dev/null +++ b/libtellurian_coarse_distance_radians.c @@ -0,0 +1,13 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +double +libtellurian_coarse_distance_radians(double latitude1, double longitude1, + double latitude2, double longitude2) +{ + double h = fma(haversin(longitude2 - longitude1), + cos(latitude1) * cos(latitude2), + haversin(latitude2 - latitude1)); + return 2.0 * LIBTELLURIAN_AUTHALIC_RADIUS * asin(sqrt(h)); +} -- cgit v1.2.3-70-g09d2