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_sea_level_radians.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 libtellurian_sea_level_radians.c (limited to 'libtellurian_sea_level_radians.c') diff --git a/libtellurian_sea_level_radians.c b/libtellurian_sea_level_radians.c new file mode 100644 index 0000000..a23b222 --- /dev/null +++ b/libtellurian_sea_level_radians.c @@ -0,0 +1,17 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +double +libtellurian_sea_level_radians(double latitude) +{ + double a = LIBTELLURIAN_EQUATORIAL_RADIUS; + double b = LIBTELLURIAN_POLAR_RADIUS; + double c = cos(latitude); + double s = sin(latitude); + double x = a * c * a; + double y = b * s * b; + double num = fma(x, x, y * y); + double denom = fma(x, c, y * s); + return sqrt(num / denom); +} -- cgit v1.2.3-70-g09d2