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-rw-r--r--src/core/frontend/input.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/src/core/frontend/input.h b/src/core/frontend/input.h
index 0a5713dc0..5916a901d 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 +108,22 @@ 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 both vectors:
+ * 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.
+ *
+ * For accelerometer state vector
+ * Units: g (gravitational acceleration)
+ *
+ * For gyroscope state vector:
+ * Orientation is determined by right-hand rule.
+ * Units: deg/sec
+ */
+using MotionDevice = InputDevice<std::tuple<Math::Vec3<float>, Math::Vec3<float>>>;
+
} // namespace Input