diff --git a/y2019/joystick_angle.cc b/y2019/joystick_angle.cc
new file mode 100644
index 0000000..1923c53
--- /dev/null
+++ b/y2019/joystick_angle.cc
@@ -0,0 +1,36 @@
+#include "y2019/joystick_angle.h"
+
+namespace y2019 {
+namespace input {
+namespace joysticks {
+
+JoystickAngle GetJoystickPosition(const JoystickAxis &x_axis,
+                                  const JoystickAxis &y_axis,
+                                  const Data &data) {
+  return GetJoystickPosition(data.GetAxis(x_axis), data.GetAxis(y_axis));
+}
+
+JoystickAngle GetJoystickPosition(float x_axis, float y_axis) {
+  if (x_axis > kJoystickRight) {
+    if (y_axis < kJoystickDown) {
+      return JoystickAngle::kUpperRight;
+    } else if (y_axis > kJoystickUp) {
+      return JoystickAngle::kLowerRight;
+    } else {
+      return JoystickAngle::kMiddleRight;
+    }
+  } else if (x_axis < kJoystickLeft) {
+    if (y_axis < kJoystickDown) {
+      return JoystickAngle::kUpperLeft;
+    } else if (y_axis > kJoystickUp) {
+      return JoystickAngle::kLowerLeft;
+    } else {
+      return JoystickAngle::kMiddleLeft;
+    }
+  }
+  return JoystickAngle::kDefault;
+}
+
+}  // namespace joysticks
+}  // namespace input
+}  // namespace y2019