From 8ca9c39bca987fc3b66ef1fb3aef1af647eb0be1 Mon Sep 17 00:00:00 2001
From: Mitchell McCaffrey <mitchemmc@gmail.com>
Date: Sat, 24 Oct 2020 09:47:53 +1100
Subject: [PATCH] Scaled pinch to zoom by stage scale

---
 src/helpers/useStageInteraction.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/helpers/useStageInteraction.js b/src/helpers/useStageInteraction.js
index 3d8a881..e408a2a 100644
--- a/src/helpers/useStageInteraction.js
+++ b/src/helpers/useStageInteraction.js
@@ -82,7 +82,10 @@ function useStageInteraction(
       const originXDelta = originX - pinchPreviousOriginRef.current.x;
       const originYDelta = originY - pinchPreviousOriginRef.current.y;
       const newScale = Math.min(
-        Math.max(stageScale + distanceDelta * touchZoomSpeed, minZoom),
+        Math.max(
+          stageScale + distanceDelta * touchZoomSpeed * stageScale,
+          minZoom
+        ),
         maxZoom
       );