From c7e6dc4832b3b5a6752a1c04def1485d0136c1c4 Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Tue, 18 Apr 2017 16:34:19 -0700
Subject: [macos] Fix pinch gesture scaling math

---
 platform/macos/src/MGLMapView.mm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'platform/macos')

diff --git a/platform/macos/src/MGLMapView.mm b/platform/macos/src/MGLMapView.mm
index 01df48c3da..c56b32bfcf 100644
--- a/platform/macos/src/MGLMapView.mm
+++ b/platform/macos/src/MGLMapView.mm
@@ -1456,7 +1456,7 @@ public:
             [self willChangeValueForKey:@"zoomLevel"];
             [self willChangeValueForKey:@"centerCoordinate"];
             MGLMapCamera *oldCamera = self.camera;
-            _mbglMap->setZoom(_zoomAtBeginningOfGesture * (1 + gestureRecognizer.magnification), center);
+            _mbglMap->setZoom(_zoomAtBeginningOfGesture + log2(1 + gestureRecognizer.magnification), center);
             if ([self.delegate respondsToSelector:@selector(mapView:shouldChangeFromCamera:toCamera:)]
                 && ![self.delegate mapView:self shouldChangeFromCamera:oldCamera toCamera:self.camera]) {
                 self.camera = oldCamera;
-- 
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