From 867eabd6b7effc8ba6c21d7fcbd0480b14f81ad0 Mon Sep 17 00:00:00 2001
From: wwylele <wwylele@gmail.com>
Date: Sun, 6 Aug 2017 22:54:19 +0300
Subject: HID: use MotionDevice for Accelerometer and Gyroscope

---
 src/core/frontend/input.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'src/core/frontend/input.h')

diff --git a/src/core/frontend/input.h b/src/core/frontend/input.h
index 0a5713dc0..a8be49440 100644
--- a/src/core/frontend/input.h
+++ b/src/core/frontend/input.h
@@ -11,6 +11,7 @@
 #include <utility>
 #include "common/logging/log.h"
 #include "common/param_package.h"
+#include "common/vector_math.h"
 
 namespace Input {
 
@@ -107,4 +108,23 @@ using ButtonDevice = InputDevice<bool>;
  */
 using AnalogDevice = InputDevice<std::tuple<float, float>>;
 
+/**
+ * A motion device is an input device that returns a tuple of accelerometer state vector and
+ * gyroscope state vector.
+ *
+ * For accelerometer state vector:
+ *   x+ is the same direction as LEFT on D-pad.
+ *   y+ is normal to the touch screen, pointing outward.
+ *   z+ is the same direction as UP on D-pad.
+ *   Units: measured in unit of gravitational acceleration
+ *
+ * For gyroscope state vector:
+ *   x+ is the same direction as LEFT on D-pad.
+ *   y+ is normal to the touch screen, pointing outward.
+ *   z+ is the same direction as UP on D-pad.
+ *   Orientation is determined by right-hand rule.
+ *   Units: deg/sec
+ */
+using MotionDevice = InputDevice<std::tuple<Math::Vec3<float>, Math::Vec3<float>>>;
+
 } // namespace Input
-- 
cgit v1.2.3