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godot/scene/3d/xr_nodes.cpp
Rémi Verschelde b5334d14f7
Update copyright statements to 2021 
Happy new year to the wonderful Godot community!

2020 has been a tough year for most of us personally, but a good year for
Godot development nonetheless with a huge amount of work done towards Godot
4.0 and great improvements backported to the long-lived 3.2 branch.

We've had close to 400 contributors to engine code this year, authoring near
7,000 commit! (And that's only for the `master` branch and for the engine code,
there's a lot more when counting docs, demos and other first-party repos.)

Here's to a great year 2021 for all Godot users 🎆
2021-01-01 20:19:21 +01:00

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/*************************************************************************/
/* xr_nodes.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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 */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* 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: */
/* */
/* 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, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "xr_nodes.h"
#include "core/input/input.h"
#include "servers/xr/xr_interface.h"
#include "servers/xr_server.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
void XRCamera3D::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_ENTER_TREE: {
// need to find our XROrigin3D parent and let it know we're its camera!
XROrigin3D *origin = Object::cast_to<XROrigin3D>(get_parent());
if (origin != nullptr) {
origin->set_tracked_camera(this);
}
}; break;
case NOTIFICATION_EXIT_TREE: {
// need to find our XROrigin3D parent and let it know we're no longer its camera!
XROrigin3D *origin = Object::cast_to<XROrigin3D>(get_parent());
if (origin != nullptr) {
origin->clear_tracked_camera_if(this);
}
}; break;
};
};
String XRCamera3D::get_configuration_warning() const {
if (!is_visible() || !is_inside_tree()) {
return String();
}
String warning = Camera3D::get_configuration_warning();
// must be child node of XROrigin3D!
XROrigin3D *origin = Object::cast_to<XROrigin3D>(get_parent());
if (origin == nullptr) {
if (!warning.is_empty()) {
warning += "\n\n";
}
warning += TTR("XRCamera3D must have an XROrigin3D node as its parent.");
};
return warning;
};
Vector3 XRCamera3D::project_local_ray_normal(const Point2 &p_pos) const {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, Vector3());
Ref<XRInterface> xr_interface = xr_server->get_primary_interface();
if (xr_interface.is_null()) {
// we might be in the editor or have VR turned off, just call superclass
return Camera3D::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 = xr_interface->get_projection_for_eye(XRInterface::EYE_MONO, viewport_size.aspect(), get_near(), get_far());
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_near()).normalized();
return ray;
};
Point2 XRCamera3D::unproject_position(const Vector3 &p_pos) const {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, Vector2());
Ref<XRInterface> xr_interface = xr_server->get_primary_interface();
if (xr_interface.is_null()) {
// we might be in the editor or have VR turned off, just call superclass
return Camera3D::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 = xr_interface->get_projection_for_eye(XRInterface::EYE_MONO, viewport_size.aspect(), get_near(), get_far());
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 XRCamera3D::project_position(const Point2 &p_point, float p_z_depth) const {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, Vector3());
Ref<XRInterface> xr_interface = xr_server->get_primary_interface();
if (xr_interface.is_null()) {
// we might be in the editor or have VR turned off, just call superclass
return Camera3D::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 = xr_interface->get_projection_for_eye(XRInterface::EYE_MONO, viewport_size.aspect(), get_near(), get_far());
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> XRCamera3D::get_frustum() const {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, Vector<Plane>());
Ref<XRInterface> xr_interface = xr_server->get_primary_interface();
if (xr_interface.is_null()) {
// we might be in the editor or have VR turned off, just call superclass
return Camera3D::get_frustum();
}
ERR_FAIL_COND_V(!is_inside_world(), Vector<Plane>());
Size2 viewport_size = get_viewport()->get_visible_rect().size;
CameraMatrix cm = xr_interface->get_projection_for_eye(XRInterface::EYE_MONO, viewport_size.aspect(), get_near(), get_far());
return cm.get_projection_planes(get_camera_transform());
};
////////////////////////////////////////////////////////////////////////////////////////////////////
void XRController3D::_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 XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
// find the tracker for our controller
XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, controller_id);
if (tracker == nullptr) {
// 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_released", 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 XRController3D::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_controller_id", "controller_id"), &XRController3D::set_controller_id);
ClassDB::bind_method(D_METHOD("get_controller_id"), &XRController3D::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"), &XRController3D::get_controller_name);
// passthroughs to information about our related joystick
ClassDB::bind_method(D_METHOD("get_joystick_id"), &XRController3D::get_joystick_id);
ClassDB::bind_method(D_METHOD("is_button_pressed", "button"), &XRController3D::is_button_pressed);
ClassDB::bind_method(D_METHOD("get_joystick_axis", "axis"), &XRController3D::get_joystick_axis);
ClassDB::bind_method(D_METHOD("get_is_active"), &XRController3D::get_is_active);
ClassDB::bind_method(D_METHOD("get_tracker_hand"), &XRController3D::get_tracker_hand);
ClassDB::bind_method(D_METHOD("get_rumble"), &XRController3D::get_rumble);
ClassDB::bind_method(D_METHOD("set_rumble", "rumble"), &XRController3D::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"), &XRController3D::get_mesh);
ADD_SIGNAL(MethodInfo("button_pressed", PropertyInfo(Variant::INT, "button")));
ADD_SIGNAL(MethodInfo("button_released", PropertyInfo(Variant::INT, "button")));
ADD_SIGNAL(MethodInfo("mesh_updated", PropertyInfo(Variant::OBJECT, "mesh", PROPERTY_HINT_RESOURCE_TYPE, "Mesh")));
};
void XRController3D::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 XRController3D::get_controller_id() const {
return controller_id;
};
String XRController3D::get_controller_name() const {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, String());
XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, controller_id);
if (tracker == nullptr) {
return String("Not connected");
};
return tracker->get_tracker_name();
};
int XRController3D::get_joystick_id() const {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, 0);
XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, controller_id);
if (tracker == nullptr) {
// No tracker? no joystick id... (0 is our first joystick)
return -1;
};
return tracker->get_joy_id();
};
bool XRController3D::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 XRController3D::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 XRController3D::get_rumble() const {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, 0.0);
XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, controller_id);
if (tracker == nullptr) {
return 0.0;
};
return tracker->get_rumble();
};
void XRController3D::set_rumble(real_t p_rumble) {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, controller_id);
if (tracker != nullptr) {
tracker->set_rumble(p_rumble);
};
};
Ref<Mesh> XRController3D::get_mesh() const {
return mesh;
}
bool XRController3D::get_is_active() const {
return is_active;
};
XRPositionalTracker::TrackerHand XRController3D::get_tracker_hand() const {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, XRPositionalTracker::TRACKER_HAND_UNKNOWN);
XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, controller_id);
if (tracker == nullptr) {
return XRPositionalTracker::TRACKER_HAND_UNKNOWN;
};
return tracker->get_tracker_hand();
};
String XRController3D::get_configuration_warning() const {
if (!is_visible() || !is_inside_tree()) {
return String();
}
String warning = Node3D::get_configuration_warning();
// must be child node of XROrigin!
XROrigin3D *origin = Object::cast_to<XROrigin3D>(get_parent());
if (origin == nullptr) {
if (!warning.is_empty()) {
warning += "\n\n";
}
warning += TTR("XRController3D must have an XROrigin3D node as its parent.");
};
if (controller_id == 0) {
if (!warning.is_empty()) {
warning += "\n\n";
}
warning += TTR("The controller ID must not be 0 or this controller won't be bound to an actual controller.");
};
return warning;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
void XRAnchor3D::_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 XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
// find the tracker for our anchor
XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_ANCHOR, anchor_id);
if (tracker == nullptr) {
// 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 = xr_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(xr_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 XRAnchor3D::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_anchor_id", "anchor_id"), &XRAnchor3D::set_anchor_id);
ClassDB::bind_method(D_METHOD("get_anchor_id"), &XRAnchor3D::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"), &XRAnchor3D::get_anchor_name);
ClassDB::bind_method(D_METHOD("get_is_active"), &XRAnchor3D::get_is_active);
ClassDB::bind_method(D_METHOD("get_size"), &XRAnchor3D::get_size);
ClassDB::bind_method(D_METHOD("get_plane"), &XRAnchor3D::get_plane);
ClassDB::bind_method(D_METHOD("get_mesh"), &XRAnchor3D::get_mesh);
ADD_SIGNAL(MethodInfo("mesh_updated", PropertyInfo(Variant::OBJECT, "mesh", PROPERTY_HINT_RESOURCE_TYPE, "Mesh")));
};
void XRAnchor3D::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 XRAnchor3D::get_anchor_id() const {
return anchor_id;
};
Vector3 XRAnchor3D::get_size() const {
return size;
};
String XRAnchor3D::get_anchor_name() const {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, String());
XRPositionalTracker *tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_ANCHOR, anchor_id);
if (tracker == nullptr) {
return String("Not connected");
};
return tracker->get_tracker_name();
};
bool XRAnchor3D::get_is_active() const {
return is_active;
};
String XRAnchor3D::get_configuration_warning() const {
if (!is_visible() || !is_inside_tree()) {
return String();
}
String warning = Node3D::get_configuration_warning();
// must be child node of XROrigin3D!
XROrigin3D *origin = Object::cast_to<XROrigin3D>(get_parent());
if (origin == nullptr) {
if (!warning.is_empty()) {
warning += "\n\n";
}
warning += TTR("XRAnchor3D must have an XROrigin3D node as its parent.");
};
if (anchor_id == 0) {
if (!warning.is_empty()) {
warning += "\n\n";
}
warning += TTR("The anchor ID must not be 0 or this anchor won't be bound to an actual anchor.");
};
return warning;
};
Plane XRAnchor3D::get_plane() const {
Vector3 location = get_translation();
Basis orientation = get_transform().basis;
Plane plane(location, orientation.get_axis(1).normalized());
return plane;
};
Ref<Mesh> XRAnchor3D::get_mesh() const {
return mesh;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
String XROrigin3D::get_configuration_warning() const {
if (!is_visible() || !is_inside_tree()) {
return String();
}
String warning = Node3D::get_configuration_warning();
if (tracked_camera == nullptr) {
if (!warning.is_empty()) {
warning += "\n\n";
}
warning += TTR("XROrigin3D requires an XRCamera3D child node.");
}
return warning;
};
void XROrigin3D::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_world_scale", "world_scale"), &XROrigin3D::set_world_scale);
ClassDB::bind_method(D_METHOD("get_world_scale"), &XROrigin3D::get_world_scale);
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "world_scale"), "set_world_scale", "get_world_scale");
};
void XROrigin3D::set_tracked_camera(XRCamera3D *p_tracked_camera) {
tracked_camera = p_tracked_camera;
};
void XROrigin3D::clear_tracked_camera_if(XRCamera3D *p_tracked_camera) {
if (tracked_camera == p_tracked_camera) {
tracked_camera = nullptr;
};
};
float XROrigin3D::get_world_scale() const {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, 1.0);
return xr_server->get_world_scale();
};
void XROrigin3D::set_world_scale(float p_world_scale) {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
xr_server->set_world_scale(p_world_scale);
};
void XROrigin3D::_notification(int p_what) {
// get our XRServer
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_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
xr_server->set_world_origin(get_global_transform());
// check if we have a primary interface
Ref<XRInterface> xr_interface = xr_server->get_primary_interface();
if (xr_interface.is_valid() && tracked_camera != nullptr) {
// get our positioning transform for our headset
Transform t = xr_interface->get_transform_for_eye(XRInterface::EYE_MONO, Transform());
// now apply this to our camera
tracked_camera->set_transform(t);
};
}; break;
default:
break;
};
// send our notification to all active XE interfaces, they may need to react to it also
for (int i = 0; i < xr_server->get_interface_count(); i++) {
Ref<XRInterface> interface = xr_server->get_interface(i);
if (interface.is_valid() && interface->is_initialized()) {
interface->notification(p_what);
}
}
};
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