From 1533af6dfd58cd6b87da9d72453afd02fa1ed8e5 Mon Sep 17 00:00:00 2001
From: Roger Caplan <caplan@nytimes.com>
Date: Tue, 16 Jan 2018 10:33:30 -0500
Subject: [PATCH] use correct starting angle for initial user pan check

---
 Sources/NYT360CameraController.m | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Sources/NYT360CameraController.m b/Sources/NYT360CameraController.m
index a76920b..9b84127 100644
--- a/Sources/NYT360CameraController.m
+++ b/Sources/NYT360CameraController.m
@@ -10,6 +10,8 @@
 #import "NYT360EulerAngleCalculations.h"
 #import "NYT360CameraPanGestureRecognizer.h"
 
+static const CGPoint kStartingPosition = { 3.14, 0 };
+
 static inline CGFloat distance(CGPoint a, CGPoint b) {
     return sqrt(pow(a.x - b.x, 2) + pow(a.y - b.y, 2));
 }
@@ -48,7 +50,7 @@ - (instancetype)initWithView:(SCNView *)view motionManager:(id<NYT360MotionManag
         
         _pointOfView = view.pointOfView;
         _view = view;
-        _currentPosition = CGPointMake(3.14, 0);
+        _currentPosition = kStartingPosition;
         _allowedDeviceMotionPanningAxes = NYT360PanningAxisHorizontal | NYT360PanningAxisVertical;
         _allowedPanGesturePanningAxes = NYT360PanningAxisHorizontal | NYT360PanningAxisVertical;
         
@@ -116,7 +118,7 @@ - (void)updateCameraAngleForCurrentDeviceMotion {
     }
     
     static const CGFloat minimalRotationDistanceToReport = 0.75;
-    if (distance(CGPointZero, self.currentPosition) > minimalRotationDistanceToReport) {
+    if (distance(kStartingPosition, self.currentPosition) > minimalRotationDistanceToReport) {
         [self reportInitialCameraMovementIfNeededViaMethod:NYT360UserInteractionMethodGyroscope];
     }
 }