From e32ee93e7ac2413cdebfc11b74d2335e396a5a01 Mon Sep 17 00:00:00 2001
From: Uwe Oestermeier <u.oestermeier@iwm-tuebingen.de>
Date: Fri, 19 Jul 2019 15:30:13 +0200
Subject: [PATCH] Improved zoom behavior.

---
 lib/scatter.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/scatter.js b/lib/scatter.js
index 5f79066..81f87e5 100644
--- a/lib/scatter.js
+++ b/lib/scatter.js
@@ -393,7 +393,9 @@ export class AbstractScatter extends Throwable {
             if (delta.distance < this.minInteractionDistance) {
                 let ratio = delta.distance / this.minInteractionDistance
                 rotate *= ratio
-                //zoom *= ratio
+                let zoomDelta = zoom - 1
+                zoomDelta *= ratio
+                zoom = 1 + zoomDelta
             }
 
             this.transform(delta, zoom, rotate, delta.about)