♻️ Updated azimuthToBearing according to comments on PR #2410

Turfjs · Aug 5, 2024 · 0cc6c93 · 0cc6c93
1 parent a0370b9
commit 0cc6c93
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Showing 2 changed files with 18 additions and 4 deletions.
diff --git a/packages/turf-helpers/index.ts b/packages/turf-helpers/index.ts
@@ -674,7 +674,9 @@ export function bearingToAzimuth(bearing: number): number {
  * @returns {number} bearing between -180 and +180 degrees
  */
 export function azimuthToBearing(angle: number): number {
-  return angle < 0 ? angle + 360 : angle;
+  angle = angle % 360;
+  if (angle > 0) return angle > 180 ? angle - 360 : angle;
+  return angle < -180 ? angle + 360 : angle;
 }
 
 /**

diff --git a/packages/turf-helpers/test.js b/packages/turf-helpers/test.js
@@ -541,11 +541,23 @@ test("bearingToAzimuth", (t) => {
   t.end();
 });
 
-test("azimuthToBearing", (t) => {
+test('azimuthToBearing', t => {
+  t.equal(azimuthToBearing(0), 0);
+  t.equal(azimuthToBearing(360), 0);
+  t.equal(azimuthToBearing(180), 180);
+
   t.equal(azimuthToBearing(40), 40);
+  t.equal(azimuthToBearing(40 + 360), 40);
+
+  t.equal(azimuthToBearing(-35), -35);
+  t.equal(azimuthToBearing(-35 - 360), -35);
+
   t.equal(azimuthToBearing(255), -105);
-  t.equal(azimuthToBearing(50), 50);
-  t.equal(azimuthToBearing(325), -35);
+  t.equal(azimuthToBearing(255 + 360), -105);
+
+  t.equal(azimuthToBearing(-200), 160);
+  t.equal(azimuthToBearing(-200 - 360), 160);
+
   t.end();
 });