text: /*************************************************************************/
  /*  arvr_nodes.cpp                                                       */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
  /*                                                                       */
  /* Permission is hereby granted, free of charge, to any person obtaining */
  /* a copy of this software and associated documentation files (the       */
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  /* distribute, sublicense, and/or sell copies of the Software, and to    */
  /* permit persons to whom the Software is furnished to do so, subject to */
  /* the following conditions:                                             */
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  /* The above copyright notice and this permission notice shall be        */
  /* included in all copies or substantial portions of the Software.       */
  /*                                                                       */
  /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
  /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
  /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
  /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
  /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
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  /*************************************************************************/
  
  #include "arvr_nodes.h"
  #include "core/os/input.h"
  #include "servers/arvr/arvr_interface.h"
  #include "servers/arvr_server.h"
  
  ////////////////////////////////////////////////////////////////////////////////////////////////////
  
  void ARVRCamera::_notification(int p_what) {
  	switch (p_what) {
  		case NOTIFICATION_ENTER_TREE: {
  			// need to find our ARVROrigin parent and let it know we're its camera!
  			ARVROrigin *origin = Object::cast_to<ARVROrigin>(get_parent());
  			if (origin != NULL) {
  				origin->set_tracked_camera(this);
  			}
  		}; break;
  		case NOTIFICATION_EXIT_TREE: {
  			// need to find our ARVROrigin parent and let it know we're no longer its camera!
  			ARVROrigin *origin = Object::cast_to<ARVROrigin>(get_parent());
  			if (origin != NULL) {
  				origin->clear_tracked_camera_if(this);
  			}
  		}; break;
  	};
  };
  
  String ARVRCamera::get_configuration_warning() const {
  	if (!is_visible() || !is_inside_tree())
  		return String();
  
  	// must be child node of ARVROrigin!
  	ARVROrigin *origin = Object::cast_to<ARVROrigin>(get_parent());
  	if (origin == NULL) {
  		return TTR("ARVRCamera must have an ARVROrigin node as its parent.");
  	};
  
  	return String();
  };
  
  Vector3 ARVRCamera::project_local_ray_normal(const Point2 &p_pos) const {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL_V(arvr_server, Vector3());
  
  	Ref<ARVRInterface> arvr_interface = arvr_server->get_primary_interface();
  	if (arvr_interface.is_null()) {
  		// we might be in the editor or have VR turned off, just call superclass
  		return Camera::project_local_ray_normal(p_pos);
  	}
  
  	ERR_FAIL_COND_V_MSG(!is_inside_tree(), Vector3(), "Camera is not inside scene.");
  
  	Size2 viewport_size = get_viewport()->get_camera_rect_size();
  	Vector2 cpos = get_viewport()->get_camera_coords(p_pos);
  	Vector3 ray;
  
  	CameraMatrix cm = arvr_interface->get_projection_for_eye(ARVRInterface::EYE_MONO, viewport_size.aspect(), get_znear(), get_zfar());
  	Vector2 screen_he = cm.get_viewport_half_extents();
  	ray = Vector3(((cpos.x / viewport_size.width) * 2.0 - 1.0) * screen_he.x, ((1.0 - (cpos.y / viewport_size.height)) * 2.0 - 1.0) * screen_he.y, -get_znear()).normalized();
  
  	return ray;
  };
  
  Point2 ARVRCamera::unproject_position(const Vector3 &p_pos) const {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL_V(arvr_server, Vector2());
  
  	Ref<ARVRInterface> arvr_interface = arvr_server->get_primary_interface();
  	if (arvr_interface.is_null()) {
  		// we might be in the editor or have VR turned off, just call superclass
  		return Camera::unproject_position(p_pos);
  	}
  
  	ERR_FAIL_COND_V_MSG(!is_inside_tree(), Vector2(), "Camera is not inside scene.");
  
  	Size2 viewport_size = get_viewport()->get_visible_rect().size;
  
  	CameraMatrix cm = arvr_interface->get_projection_for_eye(ARVRInterface::EYE_MONO, viewport_size.aspect(), get_znear(), get_zfar());
  
  	Plane p(get_camera_transform().xform_inv(p_pos), 1.0);
  
  	p = cm.xform4(p);
  	p.normal /= p.d;
  
  	Point2 res;
  	res.x = (p.normal.x * 0.5 + 0.5) * viewport_size.x;
  	res.y = (-p.normal.y * 0.5 + 0.5) * viewport_size.y;
  
  	return res;
  };
  
  Vector3 ARVRCamera::project_position(const Point2 &p_point, float p_z_depth) const {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL_V(arvr_server, Vector3());
  
  	Ref<ARVRInterface> arvr_interface = arvr_server->get_primary_interface();
  	if (arvr_interface.is_null()) {
  		// we might be in the editor or have VR turned off, just call superclass
  		return Camera::project_position(p_point, p_z_depth);
  	}
  
  	ERR_FAIL_COND_V_MSG(!is_inside_tree(), Vector3(), "Camera is not inside scene.");
  
  	Size2 viewport_size = get_viewport()->get_visible_rect().size;
  
  	CameraMatrix cm = arvr_interface->get_projection_for_eye(ARVRInterface::EYE_MONO, viewport_size.aspect(), get_znear(), get_zfar());
  
  	Vector2 vp_he = cm.get_viewport_half_extents();
  
  	Vector2 point;
  	point.x = (p_point.x / viewport_size.x) * 2.0 - 1.0;
  	point.y = (1.0 - (p_point.y / viewport_size.y)) * 2.0 - 1.0;
  	point *= vp_he;
  
  	Vector3 p(point.x, point.y, -p_z_depth);
  
  	return get_camera_transform().xform(p);
  };
  
  Vector<Plane> ARVRCamera::get_frustum() const {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL_V(arvr_server, Vector<Plane>());
  
  	Ref<ARVRInterface> arvr_interface = arvr_server->get_primary_interface();
  	if (arvr_interface.is_null()) {
  		// we might be in the editor or have VR turned off, just call superclass
  		return Camera::get_frustum();
  	}
  
  	ERR_FAIL_COND_V(!is_inside_world(), Vector<Plane>());
  
  	Size2 viewport_size = get_viewport()->get_visible_rect().size;
  	CameraMatrix cm = arvr_interface->get_projection_for_eye(ARVRInterface::EYE_MONO, viewport_size.aspect(), get_znear(), get_zfar());
  	return cm.get_projection_planes(get_camera_transform());
  };
  
  ARVRCamera::ARVRCamera(){
  	// nothing to do here yet for now..
  };
  
  ARVRCamera::~ARVRCamera(){
  	// nothing to do here yet for now..
  };
  
  ////////////////////////////////////////////////////////////////////////////////////////////////////
  
  void ARVRController::_notification(int p_what) {
  	switch (p_what) {
  		case NOTIFICATION_ENTER_TREE: {
  			set_process_internal(true);
  		}; break;
  		case NOTIFICATION_EXIT_TREE: {
  			set_process_internal(false);
  		}; break;
  		case NOTIFICATION_INTERNAL_PROCESS: {
  			// get our ARVRServer
  			ARVRServer *arvr_server = ARVRServer::get_singleton();
  			ERR_FAIL_NULL(arvr_server);
  
  			// find the tracker for our controller
  			ARVRPositionalTracker *tracker = arvr_server->find_by_type_and_id(ARVRServer::TRACKER_CONTROLLER, controller_id);
  			if (tracker == NULL) {
  				// this controller is currently turned off
  				is_active = false;
  				button_states = 0;
  			} else {
  				is_active = true;
  				set_transform(tracker->get_transform(true));
  
  				int joy_id = tracker->get_joy_id();
  				if (joy_id >= 0) {
  					int mask = 1;
  					// check button states
  					for (int i = 0; i < 16; i++) {
  						bool was_pressed = (button_states & mask) == mask;
  						bool is_pressed = Input::get_singleton()->is_joy_button_pressed(joy_id, i);
  
  						if (!was_pressed && is_pressed) {
  							emit_signal("button_pressed", i);
  							button_states += mask;
  						} else if (was_pressed && !is_pressed) {
  							emit_signal("button_release", i);
  							button_states -= mask;
  						};
  
  						mask = mask << 1;
  					};
  
  				} else {
  					button_states = 0;
  				};
  
  				// check for an updated mesh
  				Ref<Mesh> trackerMesh = tracker->get_mesh();
  				if (mesh != trackerMesh) {
  					mesh = trackerMesh;
  					emit_signal("mesh_updated", mesh);
  				}
  			};
  		}; break;
  		default:
  			break;
  	};
  };
  
  void ARVRController::_bind_methods() {
  	ClassDB::bind_method(D_METHOD("set_controller_id", "controller_id"), &ARVRController::set_controller_id);
  	ClassDB::bind_method(D_METHOD("get_controller_id"), &ARVRController::get_controller_id);
  	ADD_PROPERTY(PropertyInfo(Variant::INT, "controller_id", PROPERTY_HINT_RANGE, "0,32,1"), "set_controller_id", "get_controller_id");
  	ClassDB::bind_method(D_METHOD("get_controller_name"), &ARVRController::get_controller_name);
  
  	// passthroughs to information about our related joystick
  	ClassDB::bind_method(D_METHOD("get_joystick_id"), &ARVRController::get_joystick_id);
  	ClassDB::bind_method(D_METHOD("is_button_pressed", "button"), &ARVRController::is_button_pressed);
  	ClassDB::bind_method(D_METHOD("get_joystick_axis", "axis"), &ARVRController::get_joystick_axis);
  
  	ClassDB::bind_method(D_METHOD("get_is_active"), &ARVRController::get_is_active);
  	ClassDB::bind_method(D_METHOD("get_hand"), &ARVRController::get_hand);
  
  	ClassDB::bind_method(D_METHOD("get_rumble"), &ARVRController::get_rumble);
  	ClassDB::bind_method(D_METHOD("set_rumble", "rumble"), &ARVRController::set_rumble);
  	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "rumble", PROPERTY_HINT_RANGE, "0.0,1.0,0.01"), "set_rumble", "get_rumble");
  	ADD_PROPERTY_DEFAULT("rumble", 0.0);
  
  	ClassDB::bind_method(D_METHOD("get_mesh"), &ARVRController::get_mesh);
  
  	ADD_SIGNAL(MethodInfo("button_pressed", PropertyInfo(Variant::INT, "button")));
  	ADD_SIGNAL(MethodInfo("button_release", PropertyInfo(Variant::INT, "button")));
  	ADD_SIGNAL(MethodInfo("mesh_updated", PropertyInfo(Variant::OBJECT, "mesh", PROPERTY_HINT_RESOURCE_TYPE, "Mesh")));
  };
  
  void ARVRController::set_controller_id(int p_controller_id) {
  	// We don't check any bounds here, this controller may not yet be active and just be a place holder until it is.
  	// Note that setting this to 0 means this node is not bound to a controller yet.
  	controller_id = p_controller_id;
  	update_configuration_warning();
  };
  
  int ARVRController::get_controller_id(void) const {
  	return controller_id;
  };
  
  String ARVRController::get_controller_name(void) const {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL_V(arvr_server, String());
  
  	ARVRPositionalTracker *tracker = arvr_server->find_by_type_and_id(ARVRServer::TRACKER_CONTROLLER, controller_id);
  	if (tracker == NULL) {
  		return String("Not connected");
  	};
  
  	return tracker->get_name();
  };
  
  int ARVRController::get_joystick_id() const {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL_V(arvr_server, 0);
  
  	ARVRPositionalTracker *tracker = arvr_server->find_by_type_and_id(ARVRServer::TRACKER_CONTROLLER, controller_id);
  	if (tracker == NULL) {
  		// No tracker? no joystick id... (0 is our first joystick)
  		return -1;
  	};
  
  	return tracker->get_joy_id();
  };
  
  bool ARVRController::is_button_pressed(int p_button) const {
  	int joy_id = get_joystick_id();
  	if (joy_id == -1) {
  		return false;
  	};
  
  	return Input::get_singleton()->is_joy_button_pressed(joy_id, p_button);
  };
  
  float ARVRController::get_joystick_axis(int p_axis) const {
  	int joy_id = get_joystick_id();
  	if (joy_id == -1) {
  		return 0.0;
  	};
  
  	return Input::get_singleton()->get_joy_axis(joy_id, p_axis);
  };
  
  real_t ARVRController::get_rumble() const {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL_V(arvr_server, 0.0);
  
  	ARVRPositionalTracker *tracker = arvr_server->find_by_type_and_id(ARVRServer::TRACKER_CONTROLLER, controller_id);
  	if (tracker == NULL) {
  		return 0.0;
  	};
  
  	return tracker->get_rumble();
  };
  
  void ARVRController::set_rumble(real_t p_rumble) {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL(arvr_server);
  
  	ARVRPositionalTracker *tracker = arvr_server->find_by_type_and_id(ARVRServer::TRACKER_CONTROLLER, controller_id);
  	if (tracker != NULL) {
  		tracker->set_rumble(p_rumble);
  	};
  };
  
  Ref<Mesh> ARVRController::get_mesh() const {
  	return mesh;
  }
  
  bool ARVRController::get_is_active() const {
  	return is_active;
  };
  
  ARVRPositionalTracker::TrackerHand ARVRController::get_hand() const {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL_V(arvr_server, ARVRPositionalTracker::TRACKER_HAND_UNKNOWN);
  
  	ARVRPositionalTracker *tracker = arvr_server->find_by_type_and_id(ARVRServer::TRACKER_CONTROLLER, controller_id);
  	if (tracker == NULL) {
  		return ARVRPositionalTracker::TRACKER_HAND_UNKNOWN;
  	};
  
  	return tracker->get_hand();
  };
  
  String ARVRController::get_configuration_warning() const {
  	if (!is_visible() || !is_inside_tree())
  		return String();
  
  	// must be child node of ARVROrigin!
  	ARVROrigin *origin = Object::cast_to<ARVROrigin>(get_parent());
  	if (origin == NULL) {
  		return TTR("ARVRController must have an ARVROrigin node as its parent.");
  	};
  
  	if (controller_id == 0) {
  		return TTR("The controller ID must not be 0 or this controller won't be bound to an actual controller.");
  	};
  
  	return String();
  };
  
  ARVRController::ARVRController() {
  	controller_id = 1;
  	is_active = true;
  	button_states = 0;
  };
  
  ARVRController::~ARVRController(){
  	// nothing to do here yet for now..
  };
  
  ////////////////////////////////////////////////////////////////////////////////////////////////////
  
  void ARVRAnchor::_notification(int p_what) {
  	switch (p_what) {
  		case NOTIFICATION_ENTER_TREE: {
  			set_process_internal(true);
  		}; break;
  		case NOTIFICATION_EXIT_TREE: {
  			set_process_internal(false);
  		}; break;
  		case NOTIFICATION_INTERNAL_PROCESS: {
  			// get our ARVRServer
  			ARVRServer *arvr_server = ARVRServer::get_singleton();
  			ERR_FAIL_NULL(arvr_server);
  
  			// find the tracker for our anchor
  			ARVRPositionalTracker *tracker = arvr_server->find_by_type_and_id(ARVRServer::TRACKER_ANCHOR, anchor_id);
  			if (tracker == NULL) {
  				// this anchor is currently not available
  				is_active = false;
  			} else {
  				is_active = true;
  				Transform transform;
  
  				// we'll need our world_scale
  				real_t world_scale = arvr_server->get_world_scale();
  
  				// get our info from our tracker
  				transform.basis = tracker->get_orientation();
  				transform.origin = tracker->get_position(); // <-- already adjusted to world scale
  
  				// our basis is scaled to the size of the plane the anchor is tracking
  				// extract the size from our basis and reset the scale
  				size = transform.basis.get_scale() * world_scale;
  				transform.basis.orthonormalize();
  
  				// apply our reference frame and set our transform
  				set_transform(arvr_server->get_reference_frame() * transform);
  
  				// check for an updated mesh
  				Ref<Mesh> trackerMesh = tracker->get_mesh();
  				if (mesh != trackerMesh) {
  					mesh = trackerMesh;
  					emit_signal("mesh_updated", mesh);
  				}
  			};
  		}; break;
  		default:
  			break;
  	};
  };
  
  void ARVRAnchor::_bind_methods() {
  
  	ClassDB::bind_method(D_METHOD("set_anchor_id", "anchor_id"), &ARVRAnchor::set_anchor_id);
  	ClassDB::bind_method(D_METHOD("get_anchor_id"), &ARVRAnchor::get_anchor_id);
  	ADD_PROPERTY(PropertyInfo(Variant::INT, "anchor_id", PROPERTY_HINT_RANGE, "0,32,1"), "set_anchor_id", "get_anchor_id");
  	ClassDB::bind_method(D_METHOD("get_anchor_name"), &ARVRAnchor::get_anchor_name);
  
  	ClassDB::bind_method(D_METHOD("get_is_active"), &ARVRAnchor::get_is_active);
  	ClassDB::bind_method(D_METHOD("get_size"), &ARVRAnchor::get_size);
  
  	ClassDB::bind_method(D_METHOD("get_plane"), &ARVRAnchor::get_plane);
  
  	ClassDB::bind_method(D_METHOD("get_mesh"), &ARVRAnchor::get_mesh);
  	ADD_SIGNAL(MethodInfo("mesh_updated", PropertyInfo(Variant::OBJECT, "mesh", PROPERTY_HINT_RESOURCE_TYPE, "Mesh")));
  };
  
  void ARVRAnchor::set_anchor_id(int p_anchor_id) {
  	// We don't check any bounds here, this anchor may not yet be active and just be a place holder until it is.
  	// Note that setting this to 0 means this node is not bound to an anchor yet.
  	anchor_id = p_anchor_id;
  	update_configuration_warning();
  };
  
  int ARVRAnchor::get_anchor_id(void) const {
  	return anchor_id;
  };
  
  Vector3 ARVRAnchor::get_size() const {
  	return size;
  };
  
  String ARVRAnchor::get_anchor_name(void) const {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL_V(arvr_server, String());
  
  	ARVRPositionalTracker *tracker = arvr_server->find_by_type_and_id(ARVRServer::TRACKER_ANCHOR, anchor_id);
  	if (tracker == NULL) {
  		return String("Not connected");
  	};
  
  	return tracker->get_name();
  };
  
  bool ARVRAnchor::get_is_active() const {
  	return is_active;
  };
  
  String ARVRAnchor::get_configuration_warning() const {
  	if (!is_visible() || !is_inside_tree())
  		return String();
  
  	// must be child node of ARVROrigin!
  	ARVROrigin *origin = Object::cast_to<ARVROrigin>(get_parent());
  	if (origin == NULL) {
  		return TTR("ARVRAnchor must have an ARVROrigin node as its parent.");
  	};
  
  	if (anchor_id == 0) {
  		return TTR("The anchor ID must not be 0 or this anchor won't be bound to an actual anchor.");
  	};
  
  	return String();
  };
  
  Plane ARVRAnchor::get_plane() const {
  	Vector3 location = get_translation();
  	Basis orientation = get_transform().basis;
  
  	Plane plane(location, orientation.get_axis(1).normalized());
  
  	return plane;
  };
  
  Ref<Mesh> ARVRAnchor::get_mesh() const {
  	return mesh;
  }
  
  ARVRAnchor::ARVRAnchor() {
  	anchor_id = 1;
  	is_active = true;
  };
  
  ARVRAnchor::~ARVRAnchor(){
  	// nothing to do here yet for now..
  };
  
  ////////////////////////////////////////////////////////////////////////////////////////////////////
  
  String ARVROrigin::get_configuration_warning() const {
  	if (!is_visible() || !is_inside_tree())
  		return String();
  
  	if (tracked_camera == NULL)
  		return TTR("ARVROrigin requires an ARVRCamera child node.");
  
  	return String();
  };
  
  void ARVROrigin::_bind_methods() {
  	ClassDB::bind_method(D_METHOD("set_world_scale", "world_scale"), &ARVROrigin::set_world_scale);
  	ClassDB::bind_method(D_METHOD("get_world_scale"), &ARVROrigin::get_world_scale);
  	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "world_scale"), "set_world_scale", "get_world_scale");
  };
  
  void ARVROrigin::set_tracked_camera(ARVRCamera *p_tracked_camera) {
  	tracked_camera = p_tracked_camera;
  };
  
  void ARVROrigin::clear_tracked_camera_if(ARVRCamera *p_tracked_camera) {
  	if (tracked_camera == p_tracked_camera) {
  		tracked_camera = NULL;
  	};
  };
  
  float ARVROrigin::get_world_scale() const {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL_V(arvr_server, 1.0);
  
  	return arvr_server->get_world_scale();
  };
  
  void ARVROrigin::set_world_scale(float p_world_scale) {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL(arvr_server);
  
  	arvr_server->set_world_scale(p_world_scale);
  };
  
  void ARVROrigin::_notification(int p_what) {
  	// get our ARVRServer
  	ARVRServer *arvr_server = ARVRServer::get_singleton();
  	ERR_FAIL_NULL(arvr_server);
  
  	switch (p_what) {
  		case NOTIFICATION_ENTER_TREE: {
  			set_process_internal(true);
  		}; break;
  		case NOTIFICATION_EXIT_TREE: {
  			set_process_internal(false);
  		}; break;
  		case NOTIFICATION_INTERNAL_PROCESS: {
  			// set our world origin to our node transform
  			arvr_server->set_world_origin(get_global_transform());
  
  			// check if we have a primary interface
  			Ref<ARVRInterface> arvr_interface = arvr_server->get_primary_interface();
  			if (arvr_interface.is_valid() && tracked_camera != NULL) {
  				// get our positioning transform for our headset
  				Transform t = arvr_interface->get_transform_for_eye(ARVRInterface::EYE_MONO, Transform());
  
  				// now apply this to our camera
  				tracked_camera->set_transform(t);
  			};
  		}; break;
  		default:
  			break;
  	};
  
  	// send our notification to all active ARVR interfaces, they may need to react to it also
  	for (int i = 0; i < arvr_server->get_interface_count(); i++) {
  		Ref<ARVRInterface> interface = arvr_server->get_interface(i);
  		if (interface.is_valid() && interface->is_initialized()) {
  			interface->notification(p_what);
  		}
  	}
  };
  
  ARVROrigin::ARVROrigin() {
  	tracked_camera = NULL;
  };
  
  ARVROrigin::~ARVROrigin(){
  	// nothing to do here yet for now..
  };
  