use mod to compute angle delta

etpinard · etpinard · commit 939bdad1d24a · 2018-09-05T11:57:59.000-04:00
- thanks @alexcjohnson for the tip!
diff --git a/src/lib/angles.js b/src/lib/angles.js
@@ -37,8 +37,7 @@ function isFullCircle(aBnds) {
  * @return {number} angular delta in *radians*
  */
 function angleDelta(a, b) {
-    var d = b - a;
-    return Math.atan2(Math.sin(d), Math.cos(d));
+    return mod((b - a) - PI, twoPI) - PI;
 }
 
 /**

Original file line number	Diff line number	Diff line change
`@@ -37,8 +37,7 @@ function isFullCircle(aBnds) {`
`37`	`37`	`* @return {number} angular delta in radians`
`38`	`38`	`*/`
`39`	`39`	`function angleDelta(a, b) {`
`40`		`- var d = b - a;`
`41`		`- return Math.atan2(Math.sin(d), Math.cos(d));`
	`40`	`+ return mod((b - a) - PI, twoPI) - PI;`
`42`	`41`	`}`
`43`	`42`
`44`	`43`	`/**`