Added support for getting gravity vector from iOS

core/os/input.cpp

@@ -70,6 +70,7 @@ void Input::_bind_methods() {
 	ClassDB::bind_method(_MD("get_joy_axis_index_from_string", "axis"), &Input::get_joy_axis_index_from_string);
 	ClassDB::bind_method(_MD("start_joy_vibration", "device", "weak_magnitude", "strong_magnitude", "duration"), &Input::start_joy_vibration, DEFVAL(0));
 	ClassDB::bind_method(_MD("stop_joy_vibration", "device"), &Input::stop_joy_vibration);
+	ClassDB::bind_method(_MD("get_gravity"),&Input::get_gravity);
 	ClassDB::bind_method(_MD("get_accelerometer"),&Input::get_accelerometer);
 	ClassDB::bind_method(_MD("get_magnetometer"),&Input::get_magnetometer);
 	ClassDB::bind_method(_MD("get_gyroscope"),&Input::get_gyroscope);

core/os/input.h

@@ -82,6 +82,7 @@ public:
 
 	virtual void warp_mouse_pos(const Vector2& p_to)=0;
 
+	virtual Vector3 get_gravity() const=0;
 	virtual Vector3 get_accelerometer() const=0;
 	virtual Vector3 get_magnetometer() const=0;
 	virtual Vector3 get_gyroscope() const=0;

main/input_default.cpp

@@ -277,6 +277,12 @@ void InputDefault::joy_connection_changed(int p_idx, bool p_connected, String p_
 	emit_signal("joy_connection_changed", p_idx, p_connected);
 };
 
+Vector3 InputDefault::get_gravity() const{
+
+	_THREAD_SAFE_METHOD_
+	return gravity;
+}
+
 Vector3 InputDefault::get_accelerometer() const{
 
 	_THREAD_SAFE_METHOD_
@@ -423,6 +429,14 @@ void InputDefault::stop_joy_vibration(int p_device) {
 	joy_vibration[p_device] = vibration;
 }
 
+void InputDefault::set_gravity(const Vector3& p_gravity) {
+
+	_THREAD_SAFE_METHOD_
+
+	gravity=p_gravity;
+
+}
+
 void InputDefault::set_accelerometer(const Vector3& p_accel) {
 
 	_THREAD_SAFE_METHOD_

main/input_default.h

@@ -44,6 +44,7 @@ class InputDefault : public Input {
 	Set<int> joy_buttons_pressed;
 	Map<int,float> _joy_axis;
 	//Map<StringName,int> custom_action_press;
+	Vector3 gravity;
 	Vector3 accelerometer;
 	Vector3 magnetometer;
 	Vector3 gyroscope;
@@ -191,6 +192,7 @@ public:
 	void joy_connection_changed(int p_idx, bool p_connected, String p_name, String p_guid = "");
 	void parse_joypad_mapping(String p_mapping, bool p_update_existing);
 
+	virtual Vector3 get_gravity() const;
 	virtual Vector3 get_accelerometer() const;
 	virtual Vector3 get_magnetometer() const;
 	virtual Vector3 get_gyroscope() const;
@@ -203,6 +205,7 @@ public:
 
 
 	void parse_input_event(const InputEvent& p_event);
+	void set_gravity(const Vector3& p_gravity);
 	void set_accelerometer(const Vector3& p_accel);
 	void set_magnetometer(const Vector3& p_magnetometer);
 	void set_gyroscope(const Vector3& p_gyroscope);

platform/iphone/app_delegate.mm

@@ -218,25 +218,29 @@ static int frame_count = 0;
 				// a good thing when you're trying to get your user to move the screen in all directions and want consistent output
 
 				///@TODO Using [[UIApplication sharedApplication] statusBarOrientation] is a bit of a hack. Godot obviously knows the orientation so maybe we 
-				// can use that instead?
+				// can use that instead? (note that left and right seem swapped)
 
 				switch ([[UIApplication sharedApplication] statusBarOrientation]) {
 				case UIDeviceOrientationLandscapeLeft: {
-					OSIPhone::get_singleton()->update_accelerometer(-(acceleration.y + gravity.y), acceleration.x + gravity.x, acceleration.z + gravity.z);
+					OSIPhone::get_singleton()->update_gravity(-gravity.y, gravity.x, gravity.z);
+					OSIPhone::get_singleton()->update_accelerometer(-(acceleration.y + gravity.y), (acceleration.x + gravity.x), acceleration.z + gravity.z);
 					OSIPhone::get_singleton()->update_magnetometer(-magnetic.y, magnetic.x, magnetic.z);
 					OSIPhone::get_singleton()->update_gyroscope(-rotation.y, rotation.x, rotation.z);
 				}; break;
 				case UIDeviceOrientationLandscapeRight: {
-					OSIPhone::get_singleton()->update_accelerometer(acceleration.y + gravity.y, acceleration.x + gravity.x, acceleration.z + gravity.z);
-					OSIPhone::get_singleton()->update_magnetometer(magnetic.y, magnetic.x, magnetic.z);
-					OSIPhone::get_singleton()->update_gyroscope(rotation.y, rotation.x, rotation.z);
+					OSIPhone::get_singleton()->update_gravity(gravity.y, -gravity.x, gravity.z);
+					OSIPhone::get_singleton()->update_accelerometer((acceleration.y + gravity.y), -(acceleration.x + gravity.x), acceleration.z + gravity.z);
+					OSIPhone::get_singleton()->update_magnetometer(magnetic.y, -magnetic.x, magnetic.z);
+					OSIPhone::get_singleton()->update_gyroscope(rotation.y, -rotation.x, rotation.z);
 				}; break;
 				case UIDeviceOrientationPortraitUpsideDown: {
-					OSIPhone::get_singleton()->update_accelerometer(-(acceleration.x + gravity.x), acceleration.y + gravity.y, acceleration.z + gravity.z);
+					OSIPhone::get_singleton()->update_gravity(-gravity.x, gravity.y, gravity.z);
+					OSIPhone::get_singleton()->update_accelerometer(-(acceleration.x + gravity.x), (acceleration.y + gravity.y), acceleration.z + gravity.z);
 					OSIPhone::get_singleton()->update_magnetometer(-magnetic.x, magnetic.y, magnetic.z);
 					OSIPhone::get_singleton()->update_gyroscope(-rotation.x, rotation.y, rotation.z);
 				}; break;
 				default: { // assume portrait
+					OSIPhone::get_singleton()->update_gravity(gravity.x, gravity.y, gravity.z);
 					OSIPhone::get_singleton()->update_accelerometer(acceleration.x + gravity.x, acceleration.y + gravity.y, acceleration.z + gravity.z);
 					OSIPhone::get_singleton()->update_magnetometer(magnetic.x, magnetic.y, magnetic.z);
 					OSIPhone::get_singleton()->update_gyroscope(rotation.x, rotation.y, rotation.z);

platform/iphone/os_iphone.cpp

@@ -323,6 +323,10 @@ void OSIPhone::touches_cancelled() {
 
 static const float ACCEL_RANGE = 1;
 
+void OSIPhone::update_gravity(float p_x, float p_y, float p_z) {
+	input->set_gravity(Vector3(p_x, p_y, p_z));
+};
+
 void OSIPhone::update_accelerometer(float p_x, float p_y, float p_z) {
 
 	// Found out the Z should not be negated! Pass as is!

platform/iphone/os_iphone.h

@@ -152,6 +152,7 @@ public:
 
 	int set_base_framebuffer(int p_fb);
 
+	void update_gravity(float p_x, float p_y, float p_z);
 	void update_accelerometer(float p_x, float p_y, float p_z);
 	void update_magnetometer(float p_x, float p_y, float p_z);
 	void update_gyroscope(float p_x, float p_y, float p_z);