From c029f67832ed8fa748fb88552628093dad477db3 Mon Sep 17 00:00:00 2001
From: todayama_r <13657682+Corvus400@users.noreply.github.com>
Date: Wed, 4 Sep 2024 18:57:17 +0900
Subject: [PATCH] :wrench: Reverse the pitch value to match the left-hand
 coordinate system. If you don't reverse the values, the tilt of the device
 will be opposite between Android and iOS.

---
 .../confsched/droidkaigiui/OrientationSensorManager.ios.kt     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/core/droidkaigiui/src/iosMain/kotlin/io/github/droidkaigi/confsched/droidkaigiui/OrientationSensorManager.ios.kt b/core/droidkaigiui/src/iosMain/kotlin/io/github/droidkaigi/confsched/droidkaigiui/OrientationSensorManager.ios.kt
index 55614fdbc..e10eb58f7 100644
--- a/core/droidkaigiui/src/iosMain/kotlin/io/github/droidkaigi/confsched/droidkaigiui/OrientationSensorManager.ios.kt
+++ b/core/droidkaigiui/src/iosMain/kotlin/io/github/droidkaigi/confsched/droidkaigiui/OrientationSensorManager.ios.kt
@@ -35,7 +35,8 @@ internal class IosOrientationSensorManager(
                 onOrientationChanged(
                     Orientation(
                         azimuth = motion.attitude.yaw.toFloat(),
-                        pitch = motion.attitude.pitch.toFloat(),
+                        // Unlike Android, iOS uses a left-handed coordinate system, so we need to invert the pitch value.
+                        pitch = -motion.attitude.pitch.toFloat(),
                         roll = motion.attitude.roll.toFloat(),
                     ),
                 )