Converted sensor acceleration units to m/s^2 on iOS and UWP

This is beacuse on Android these values are already in m/s^2 while on
iOS and UWP they are in g. This just makes the behaviour consistent on
all platforms.

1 files changed, 11 insertions, 1 deletions

diff --git a/platform/iphone/godot_view.mm b/platform/iphone/godot_view.mm
index 887297848e..468fa2928a 100644
--- a/platform/iphone/godot_view.mm
+++ b/platform/iphone/godot_view.mm
@@ -39,6 +39,7 @@
 #import <CoreMotion/CoreMotion.h>
 
 static const int max_touches = 8;
+static const float earth_gravity = 9.80665;
 
 @interface GodotView () {
 	UITouch *godot_touches[max_touches];
@@ -402,10 +403,19 @@ static const int max_touches = 8;
 	// https://developer.apple.com/reference/coremotion/cmmotionmanager?language=objc
 
 	// Apple splits our accelerometer date into a gravity and user movement
-	// component. We add them back together
+	// component. We add them back together.
 	CMAcceleration gravity = self.motionManager.deviceMotion.gravity;
 	CMAcceleration acceleration = self.motionManager.deviceMotion.userAcceleration;
 
+	// To be consistent with Android we convert the unit of measurement from g (Earth's gravity)
+	// to m/s^2.
+	gravity.x *= earth_gravity;
+	gravity.y *= earth_gravity;
+	gravity.z *= earth_gravity;
+	acceleration.x *= earth_gravity;
+	acceleration.y *= earth_gravity;
+	acceleration.z *= earth_gravity;
+
 	///@TODO We don't seem to be getting data here, is my device broken or
 	/// is this code incorrect?
 	CMMagneticField magnetic = self.motionManager.deviceMotion.magneticField.field;