From 9b0fb726706d5bea77be3a8e78e62bcf09845085 Mon Sep 17 00:00:00 2001
From: Alexander Harding <noreply@harding.dev>
Date: Fri, 3 Jan 2025 22:45:25 -0600
Subject: [PATCH] lceanup

---
 src/features/rap/Row.tsx | 29 ++++-------------------------
 src/helpers/vector.ts    | 23 +++++++++++++++++++++++
 2 files changed, 27 insertions(+), 25 deletions(-)
 create mode 100644 src/helpers/vector.ts

diff --git a/src/features/rap/Row.tsx b/src/features/rap/Row.tsx
index b52af8a..bf08c33 100644
--- a/src/features/rap/Row.tsx
+++ b/src/features/rap/Row.tsx
@@ -5,6 +5,9 @@ import Temperature from "./cells/Temperature";
 import WindDirection from "./cells/WindDirection";
 import WindSpeed from "./cells/WindSpeed";
 import { css } from "@emotion/react";
+import { vectorDifferenceMagnitude } from "../../helpers/vector";
+
+const DELTA_WINDSPEED_VECTOR_THRESHOLD_KPH = 10;
 
 const TableRow = styled.tr<{ opaque: boolean }>`
   ${({ opaque }) =>
@@ -40,7 +43,7 @@ export default function Row({
       datum.windDirectionInDeg,
       displayedRapData[index - 1]?.windSpeedInKph,
       displayedRapData[index - 1]?.windDirectionInDeg,
-    ) > 10;
+    ) > DELTA_WINDSPEED_VECTOR_THRESHOLD_KPH;
 
   return (
     <TableRow key={index} opaque={negativeAltitude(datum)}>
@@ -84,27 +87,3 @@ export default function Row({
     </TableRow>
   );
 }
-
-function vectorDifferenceMagnitude(
-  speed1: number,
-  direction1: number,
-  speed2: number,
-  direction2: number,
-): number {
-  // Convert directions from degrees to radians
-  const radian1 = (Math.PI / 180) * direction1;
-  const radian2 = (Math.PI / 180) * direction2;
-
-  // Convert polar coordinates to Cartesian coordinates
-  const x1 = speed1 * Math.cos(radian1);
-  const y1 = speed1 * Math.sin(radian1);
-  const x2 = speed2 * Math.cos(radian2);
-  const y2 = speed2 * Math.sin(radian2);
-
-  // Calculate the difference in Cartesian coordinates
-  const dx = x2 - x1;
-  const dy = y2 - y1;
-
-  // Calculate the magnitude of the difference vector
-  return Math.sqrt(dx * dx + dy * dy);
-}
diff --git a/src/helpers/vector.ts b/src/helpers/vector.ts
new file mode 100644
index 0000000..11feac3
--- /dev/null
+++ b/src/helpers/vector.ts
@@ -0,0 +1,23 @@
+export function vectorDifferenceMagnitude(
+  speed1: number,
+  direction1: number,
+  speed2: number,
+  direction2: number,
+): number {
+  // Convert directions from degrees to radians
+  const radian1 = (Math.PI / 180) * direction1;
+  const radian2 = (Math.PI / 180) * direction2;
+
+  // Convert polar coordinates to Cartesian coordinates
+  const x1 = speed1 * Math.cos(radian1);
+  const y1 = speed1 * Math.sin(radian1);
+  const x2 = speed2 * Math.cos(radian2);
+  const y2 = speed2 * Math.sin(radian2);
+
+  // Calculate the difference in Cartesian coordinates
+  const dx = x2 - x1;
+  const dy = y2 - y1;
+
+  // Calculate the magnitude of the difference vector
+  return Math.sqrt(dx * dx + dy * dy);
+}