From 2dafc1f32193ecdbaede038a0a18ed11bd19cacc Mon Sep 17 00:00:00 2001
From: Dorian Pula <dorian.pula@amber-penguin-software.ca>
Date: Wed, 6 Nov 2019 17:23:25 -0500
Subject: [PATCH] Add in a windchill calculator.

---
 src/lib.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 17dfd50..174f25d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -22,8 +22,18 @@ impl Temperature {
     fn to_fahrenheit(&self) -> f32 {
         self.celsius * 1.8 + 32.0
     }
+
+    fn windchill(&self, wind_speed_kph: f32) -> f32 {
+        // From https://www.weather.gov/media/epz/wxcalc/windChill.pdf
+        // And https://www.calcunation.com/calculator/wind-chill-celsius.php
+        13.12 + (0.6215 * self.celsius) - (11.37 * wind_speed_kph.powf(0.16))
+            + (0.3965 * self.celsius * wind_speed_kph.powf(0.16))
+    }
 }
 
+// Refer to: https://www.weather.gov/epz/wxcalc_windchill
+// TODO: Add a test that -20 C and 32 kph feels like -32.9
+
 #[pyfunction]
 fn batch_converter(temperatures: Vec<f32>) -> Vec<f32> {
     temperatures