Read orientation and forward it as axes (Linux/Evdev gamepad)

src/networking/executor.cpp

@@ -148,7 +148,9 @@ ParseResult parse_gamepad_state(const char *data, size_t len)
 			 << "\nLeft thumbstick x: " << result.reading.left_thumbstick_x
 			 << "\nLeft thumbstick y: " << result.reading.left_thumbstick_y
 			 << "\nRight thumbstick x: " << result.reading.right_thumbstick_x
-			 << "\nRight thumbstick y: " << result.reading.right_thumbstick_y;
+			 << "\nRight thumbstick y: " << result.reading.right_thumbstick_y
+			 << "\nPitch: " << result.reading.pitch
+			 << "\nRoll: " << result.reading.roll;
 #endif
 
 	return result;
@@ -432,6 +434,7 @@ bool GamepadExecutor::inject_gamepad_state(vgp_data_exchange_gamepad_reading con
 	m_injector.setThumbsticks(reading.left_thumbstick_x, -reading.left_thumbstick_y,
 							  reading.right_thumbstick_x, -reading.right_thumbstick_y);
 	m_injector.setTriggers(reading.left_trigger, reading.right_trigger);
+	m_injector.setOrientation(reading.pitch, reading.roll);
 
 	// Handle button presses (mapping from our buttons to Linux input codes)
 	if (reading.buttons_down & GamepadButtons_Menu)

src/simulation/gamepadSim.hpp

@@ -88,6 +88,14 @@ class GamepadInjector
 	 */
 	void setTriggers(float leftTrigger, float rightTrigger);
 
+	/**
+	 * @brief Sets orientation as axis value (Linux)
+	 *
+	 * @param pitch pitch (-PI/2 to PI)
+	 * @param roll roll (-PI to PI)
+	 */
+	void setOrientation(float pitch, float roll);
+
 	/**
 	 * @brief Press a gamepad button (Linux).
 	 *

src/simulation/linux/gamepadSim.cpp

@@ -100,6 +100,16 @@
 	libevdev_enable_event_code(dev.get(), EV_ABS, ABS_HAT2X, &absinfo);	 // Left trigger
 	libevdev_enable_event_code(dev.get(), EV_ABS, ABS_HAT2Y, &absinfo); // Right trigger
 
+	// Orientation
+	absinfo.minimum = static_cast<int>(-std::numbers::pi / 2 * 20000);
+	absinfo.maximum = static_cast<int>(std::numbers::pi / 2 * 20000);
+	absinfo.fuzz = 0;
+	absinfo.flat = 0;
+	libevdev_enable_event_code(dev.get(), EV_ABS, ABS_HAT3X, &absinfo);	 // Pitch
+	absinfo.minimum = static_cast<int>(-std::numbers::pi * 10000);
+	absinfo.maximum = static_cast<int>(std::numbers::pi * 10000);
+	libevdev_enable_event_code(dev.get(), EV_ABS, ABS_HAT3Y, &absinfo); // Roll
+
 	// Create uinput device
 	libevdev_uinput *rawUidev;
 	int ret =
@@ -153,6 +163,17 @@
 	libevdev_uinput_write_event(uidev.get(), EV_ABS, ABS_HAT2Y, rightInt);
 }
 
+void GamepadInjector::setOrientation(float pitch, float roll)
+{
+	qInfo() << pitch << "\n";
+	// Convert from [-PI/2..PI/2] to int range defined earlier with libevdev_enable_event_code for this axis
+	int evdevPitch = static_cast<int>(pitch * 20000);
+	// Convert from [-PI..PI] to int range defined earlier with libevdev_enable_event_code for this axis
+	int evdevRoll = static_cast<int>(roll * 10000);
+	libevdev_uinput_write_event(uidev.get(), EV_ABS, ABS_HAT3X, evdevPitch);
+	libevdev_uinput_write_event(uidev.get(), EV_ABS, ABS_HAT3Y, evdevRoll);
+}
+
 void GamepadInjector::pressButton(int buttonCode)
 {
 	libevdev_uinput_write_event(uidev.get(), EV_KEY, buttonCode, 1);