virtualx-engine/modules/webxr/webxr_interface_js.cpp

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/*************************************************************************/
/* webxr_interface_js.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. */
/*************************************************************************/
#ifdef JAVASCRIPT_ENABLED
#include "webxr_interface_js.h"
#include "core/input/input.h"
#include "core/os/os.h"
#include "emscripten.h"
#include "godot_webxr.h"
#include "servers/rendering/renderer_compositor.h"
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#include <stdlib.h>
void _emwebxr_on_session_supported(char *p_session_mode, int p_supported) {
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
Ref<XRInterface> interface = xr_server->find_interface("WebXR");
ERR_FAIL_COND(interface.is_null());
String session_mode = String(p_session_mode);
interface->emit_signal(SNAME("session_supported"), session_mode, p_supported ? true : false);
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}
void _emwebxr_on_session_started(char *p_reference_space_type) {
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
Ref<XRInterface> interface = xr_server->find_interface("WebXR");
ERR_FAIL_COND(interface.is_null());
String reference_space_type = String(p_reference_space_type);
((WebXRInterfaceJS *)interface.ptr())->_set_reference_space_type(reference_space_type);
interface->emit_signal(SNAME("session_started"));
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}
void _emwebxr_on_session_ended() {
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
Ref<XRInterface> interface = xr_server->find_interface("WebXR");
ERR_FAIL_COND(interface.is_null());
interface->uninitialize();
interface->emit_signal(SNAME("session_ended"));
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}
void _emwebxr_on_session_failed(char *p_message) {
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
Ref<XRInterface> interface = xr_server->find_interface("WebXR");
ERR_FAIL_COND(interface.is_null());
interface->uninitialize();
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String message = String(p_message);
interface->emit_signal(SNAME("session_failed"), message);
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}
void _emwebxr_on_controller_changed() {
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
Ref<XRInterface> interface = xr_server->find_interface("WebXR");
ERR_FAIL_COND(interface.is_null());
((WebXRInterfaceJS *)interface.ptr())->_on_controller_changed();
}
extern "C" EMSCRIPTEN_KEEPALIVE void _emwebxr_on_input_event(char *p_signal_name, int p_input_source) {
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
Ref<XRInterface> interface = xr_server->find_interface("WebXR");
ERR_FAIL_COND(interface.is_null());
StringName signal_name = StringName(p_signal_name);
interface->emit_signal(signal_name, p_input_source + 1);
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}
extern "C" EMSCRIPTEN_KEEPALIVE void _emwebxr_on_simple_event(char *p_signal_name) {
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
Ref<XRInterface> interface = xr_server->find_interface("WebXR");
ERR_FAIL_COND(interface.is_null());
StringName signal_name = StringName(p_signal_name);
interface->emit_signal(signal_name);
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}
void WebXRInterfaceJS::is_session_supported(const String &p_session_mode) {
godot_webxr_is_session_supported(p_session_mode.utf8().get_data(), &_emwebxr_on_session_supported);
}
void WebXRInterfaceJS::set_session_mode(String p_session_mode) {
session_mode = p_session_mode;
}
String WebXRInterfaceJS::get_session_mode() const {
return session_mode;
}
void WebXRInterfaceJS::set_required_features(String p_required_features) {
required_features = p_required_features;
}
String WebXRInterfaceJS::get_required_features() const {
return required_features;
}
void WebXRInterfaceJS::set_optional_features(String p_optional_features) {
optional_features = p_optional_features;
}
String WebXRInterfaceJS::get_optional_features() const {
return optional_features;
}
void WebXRInterfaceJS::set_requested_reference_space_types(String p_requested_reference_space_types) {
requested_reference_space_types = p_requested_reference_space_types;
}
String WebXRInterfaceJS::get_requested_reference_space_types() const {
return requested_reference_space_types;
}
void WebXRInterfaceJS::_set_reference_space_type(String p_reference_space_type) {
reference_space_type = p_reference_space_type;
}
String WebXRInterfaceJS::get_reference_space_type() const {
return reference_space_type;
}
Ref<XRPositionalTracker> WebXRInterfaceJS::get_controller(int p_controller_id) const {
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XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, nullptr);
return xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, p_controller_id);
}
String WebXRInterfaceJS::get_visibility_state() const {
char *c_str = godot_webxr_get_visibility_state();
if (c_str) {
String visibility_state = String(c_str);
free(c_str);
return visibility_state;
}
return String();
}
PackedVector3Array WebXRInterfaceJS::get_bounds_geometry() const {
PackedVector3Array ret;
int *js_bounds = godot_webxr_get_bounds_geometry();
if (js_bounds) {
ret.resize(js_bounds[0]);
for (int i = 0; i < js_bounds[0]; i++) {
float *js_vector3 = ((float *)js_bounds) + (i * 3) + 1;
ret.set(i, Vector3(js_vector3[0], js_vector3[1], js_vector3[2]));
}
free(js_bounds);
}
return ret;
}
StringName WebXRInterfaceJS::get_name() const {
return "WebXR";
};
uint32_t WebXRInterfaceJS::get_capabilities() const {
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return XRInterface::XR_STEREO | XRInterface::XR_MONO;
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};
uint32_t WebXRInterfaceJS::get_view_count() {
return godot_webxr_get_view_count();
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};
bool WebXRInterfaceJS::is_initialized() const {
return (initialized);
};
bool WebXRInterfaceJS::initialize() {
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, false);
if (!initialized) {
if (!godot_webxr_is_supported()) {
return false;
}
if (requested_reference_space_types.size() == 0) {
return false;
}
// make this our primary interface
xr_server->set_primary_interface(this);
// Clear render_targetsize to make sure it gets reset to the new size.
// Clearing in uninitialize() doesn't work because a frame can still be
// rendered after it's called, which will fill render_targetsize again.
render_targetsize.width = 0;
render_targetsize.height = 0;
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initialized = true;
godot_webxr_initialize(
session_mode.utf8().get_data(),
required_features.utf8().get_data(),
optional_features.utf8().get_data(),
requested_reference_space_types.utf8().get_data(),
&_emwebxr_on_session_started,
&_emwebxr_on_session_ended,
&_emwebxr_on_session_failed,
&_emwebxr_on_controller_changed,
&_emwebxr_on_input_event,
&_emwebxr_on_simple_event);
};
return true;
};
void WebXRInterfaceJS::uninitialize() {
if (initialized) {
XRServer *xr_server = XRServer::get_singleton();
if (xr_server != nullptr && xr_server->get_primary_interface() == this) {
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// no longer our primary interface
xr_server->set_primary_interface(nullptr);
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}
godot_webxr_uninitialize();
reference_space_type = "";
initialized = false;
};
};
Transform3D WebXRInterfaceJS::_js_matrix_to_transform(float *p_js_matrix) {
Transform3D transform;
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transform.basis.elements[0].x = p_js_matrix[0];
transform.basis.elements[1].x = p_js_matrix[1];
transform.basis.elements[2].x = p_js_matrix[2];
transform.basis.elements[0].y = p_js_matrix[4];
transform.basis.elements[1].y = p_js_matrix[5];
transform.basis.elements[2].y = p_js_matrix[6];
transform.basis.elements[0].z = p_js_matrix[8];
transform.basis.elements[1].z = p_js_matrix[9];
transform.basis.elements[2].z = p_js_matrix[10];
transform.origin.x = p_js_matrix[12];
transform.origin.y = p_js_matrix[13];
transform.origin.z = p_js_matrix[14];
return transform;
}
Size2 WebXRInterfaceJS::get_render_target_size() {
if (render_targetsize.width != 0 && render_targetsize.height != 0) {
return render_targetsize;
}
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int *js_size = godot_webxr_get_render_target_size();
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if (!initialized || js_size == nullptr) {
// As a temporary default (until WebXR is fully initialized), use half the window size.
Size2 temp = DisplayServer::get_singleton()->window_get_size();
temp.width /= 2.0;
return temp;
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}
render_targetsize.width = js_size[0];
render_targetsize.height = js_size[1];
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free(js_size);
return render_targetsize;
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};
Transform3D WebXRInterfaceJS::get_camera_transform() {
Transform3D transform_for_eye;
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XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, transform_for_eye);
float *js_matrix = godot_webxr_get_transform_for_eye(0);
if (!initialized || js_matrix == nullptr) {
return transform_for_eye;
}
transform_for_eye = _js_matrix_to_transform(js_matrix);
free(js_matrix);
return xr_server->get_reference_frame() * transform_for_eye;
};
Transform3D WebXRInterfaceJS::get_transform_for_view(uint32_t p_view, const Transform3D &p_cam_transform) {
Transform3D transform_for_eye;
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL_V(xr_server, transform_for_eye);
float *js_matrix = godot_webxr_get_transform_for_eye(p_view + 1);
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if (!initialized || js_matrix == nullptr) {
transform_for_eye = p_cam_transform;
return transform_for_eye;
}
transform_for_eye = _js_matrix_to_transform(js_matrix);
free(js_matrix);
return p_cam_transform * xr_server->get_reference_frame() * transform_for_eye;
};
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CameraMatrix WebXRInterfaceJS::get_projection_for_view(uint32_t p_view, double p_aspect, double p_z_near, double p_z_far) {
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CameraMatrix eye;
float *js_matrix = godot_webxr_get_projection_for_eye(p_view + 1);
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if (!initialized || js_matrix == nullptr) {
return eye;
}
int k = 0;
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
eye.matrix[i][j] = js_matrix[k++];
}
}
free(js_matrix);
// Copied from godot_oculus_mobile's ovr_mobile_session.cpp
eye.matrix[2][2] = -(p_z_far + p_z_near) / (p_z_far - p_z_near);
eye.matrix[3][2] = -(2.0f * p_z_far * p_z_near) / (p_z_far - p_z_near);
return eye;
}
Vector<BlitToScreen> WebXRInterfaceJS::commit_views(RID p_render_target, const Rect2 &p_screen_rect) {
Vector<BlitToScreen> blit_to_screen;
if (!initialized) {
return blit_to_screen;
}
// @todo Refactor this to be based on "views" rather than "eyes".
godot_webxr_commit_for_eye(XRInterface::EYE_LEFT);
if (godot_webxr_get_view_count() > 1) {
godot_webxr_commit_for_eye(XRInterface::EYE_RIGHT);
}
return blit_to_screen;
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};
void WebXRInterfaceJS::process() {
if (initialized) {
godot_webxr_sample_controller_data();
int controller_count = godot_webxr_get_controller_count();
if (controller_count == 0) {
return;
}
for (int i = 0; i < controller_count; i++) {
_update_tracker(i);
}
};
};
void WebXRInterfaceJS::_update_tracker(int p_controller_id) {
XRServer *xr_server = XRServer::get_singleton();
ERR_FAIL_NULL(xr_server);
Ref<XRPositionalTracker> tracker = xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, p_controller_id + 1);
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if (godot_webxr_is_controller_connected(p_controller_id)) {
if (tracker.is_null()) {
tracker.instantiate();
tracker->set_tracker_type(XRServer::TRACKER_CONTROLLER);
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// Controller id's 0 and 1 are always the left and right hands.
if (p_controller_id < 2) {
tracker->set_tracker_name(p_controller_id == 0 ? "Left" : "Right");
tracker->set_tracker_hand(p_controller_id == 0 ? XRPositionalTracker::TRACKER_HAND_LEFT : XRPositionalTracker::TRACKER_HAND_RIGHT);
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}
// Use the ids we're giving to our "virtual" gamepads.
tracker->set_joy_id(p_controller_id + 100);
xr_server->add_tracker(tracker);
}
Input *input = Input::get_singleton();
float *tracker_matrix = godot_webxr_get_controller_transform(p_controller_id);
if (tracker_matrix) {
Transform3D transform = _js_matrix_to_transform(tracker_matrix);
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tracker->set_position(transform.origin);
tracker->set_orientation(transform.basis);
free(tracker_matrix);
}
int *buttons = godot_webxr_get_controller_buttons(p_controller_id);
if (buttons) {
for (int i = 0; i < buttons[0]; i++) {
input->joy_button(p_controller_id + 100, (JoyButton)i, *((float *)buttons + (i + 1)));
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}
free(buttons);
}
int *axes = godot_webxr_get_controller_axes(p_controller_id);
if (axes) {
for (int i = 0; i < axes[0]; i++) {
Input::JoyAxisValue joy_axis;
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joy_axis.min = -1;
joy_axis.value = *((float *)axes + (i + 1));
input->joy_axis(p_controller_id + 100, (JoyAxis)i, joy_axis);
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}
free(axes);
}
} else if (tracker.is_valid()) {
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xr_server->remove_tracker(tracker);
}
}
void WebXRInterfaceJS::_on_controller_changed() {
// Register "virtual" gamepads with Godot for the ones we get from WebXR.
godot_webxr_sample_controller_data();
for (int i = 0; i < 2; i++) {
bool controller_connected = godot_webxr_is_controller_connected(i);
if (controllers_state[i] != controller_connected) {
Input::get_singleton()->joy_connection_changed(i + 100, controller_connected, i == 0 ? "Left" : "Right", "");
controllers_state[i] = controller_connected;
}
}
}
WebXRInterfaceJS::WebXRInterfaceJS() {
initialized = false;
session_mode = "inline";
requested_reference_space_types = "local";
};
WebXRInterfaceJS::~WebXRInterfaceJS() {
// and make sure we cleanup if we haven't already
if (initialized) {
uninitialize();
};
};
#endif // JAVASCRIPT_ENABLED