Make negative scaleFactor reverse middle arrow correctly (visjs#3474)

MightyPork · Primoz Susa · commit 03afd54bf158 · 2019-01-03T15:58:28.000+01:00
diff --git a/lib/network/modules/components/edges/util/EdgeBase.js b/lib/network/modules/components/edges/util/EdgeBase.js
@@ -538,6 +538,7 @@ class EdgeBase {
       }
     }
 
+    if (position === 'middle' && scaleFactor < 0) lineWidth *= -1; // reversed middle arrow
     let length = 15 * scaleFactor + 3 * lineWidth; // 3* lineWidth is the width of the edge.
 
     var xi = arrowPoint.x - length * 0.9 * Math.cos(angle);

Original file line number	Diff line number	Diff line change
`@@ -538,6 +538,7 @@ class EdgeBase {`
`538`	`538`	`}`
`539`	`539`	`}`
`540`	`540`
	`541`	`+ if (position === 'middle' && scaleFactor < 0) lineWidth *= -1; // reversed middle arrow`
`541`	`542`	`let length = 15 * scaleFactor + 3 * lineWidth; // 3* lineWidth is the width of the edge.`
`542`	`543`
`543`	`544`	`var xi = arrowPoint.x - length * 0.9 * Math.cos(angle);`