452 lines
14 KiB
C++
452 lines
14 KiB
C++
/*************************************************************************/
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/* webxr_interface_js.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifdef JAVASCRIPT_ENABLED
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#include "webxr_interface_js.h"
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#include "core/input/input.h"
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#include "core/os/os.h"
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#include "emscripten.h"
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#include "godot_webxr.h"
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#include <stdlib.h>
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void _emwebxr_on_session_supported(char *p_session_mode, int p_supported) {
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XRServer *xr_server = XRServer::get_singleton();
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ERR_FAIL_NULL(xr_server);
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Ref<XRInterface> interface = xr_server->find_interface("WebXR");
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ERR_FAIL_COND(interface.is_null());
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String session_mode = String(p_session_mode);
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interface->emit_signal("session_supported", session_mode, p_supported ? true : false);
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}
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void _emwebxr_on_session_started(char *p_reference_space_type) {
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XRServer *xr_server = XRServer::get_singleton();
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ERR_FAIL_NULL(xr_server);
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Ref<XRInterface> interface = xr_server->find_interface("WebXR");
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ERR_FAIL_COND(interface.is_null());
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String reference_space_type = String(p_reference_space_type);
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((WebXRInterfaceJS *)interface.ptr())->_set_reference_space_type(reference_space_type);
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interface->emit_signal("session_started");
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}
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void _emwebxr_on_session_ended() {
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XRServer *xr_server = XRServer::get_singleton();
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ERR_FAIL_NULL(xr_server);
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Ref<XRInterface> interface = xr_server->find_interface("WebXR");
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ERR_FAIL_COND(interface.is_null());
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interface->uninitialize();
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interface->emit_signal("session_ended");
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}
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void _emwebxr_on_session_failed(char *p_message) {
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XRServer *xr_server = XRServer::get_singleton();
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ERR_FAIL_NULL(xr_server);
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Ref<XRInterface> interface = xr_server->find_interface("WebXR");
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ERR_FAIL_COND(interface.is_null());
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String message = String(p_message);
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interface->emit_signal("session_failed", message);
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}
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void _emwebxr_on_controller_changed() {
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XRServer *xr_server = XRServer::get_singleton();
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ERR_FAIL_NULL(xr_server);
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Ref<XRInterface> interface = xr_server->find_interface("WebXR");
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ERR_FAIL_COND(interface.is_null());
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((WebXRInterfaceJS *)interface.ptr())->_on_controller_changed();
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}
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extern "C" EMSCRIPTEN_KEEPALIVE void _emwebxr_on_input_event(char *p_signal_name, int p_input_source) {
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XRServer *xr_server = XRServer::get_singleton();
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ERR_FAIL_NULL(xr_server);
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Ref<XRInterface> interface = xr_server->find_interface("WebXR");
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ERR_FAIL_COND(interface.is_null());
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StringName signal_name = StringName(p_signal_name);
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interface->emit_signal(signal_name, p_input_source + 1);
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}
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extern "C" EMSCRIPTEN_KEEPALIVE void _emwebxr_on_simple_event(char *p_signal_name) {
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XRServer *xr_server = XRServer::get_singleton();
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ERR_FAIL_NULL(xr_server);
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Ref<XRInterface> interface = xr_server->find_interface("WebXR");
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ERR_FAIL_COND(interface.is_null());
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StringName signal_name = StringName(p_signal_name);
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interface->emit_signal(signal_name);
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}
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void WebXRInterfaceJS::is_session_supported(const String &p_session_mode) {
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godot_webxr_is_session_supported(p_session_mode.utf8().get_data(), &_emwebxr_on_session_supported);
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}
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void WebXRInterfaceJS::set_session_mode(String p_session_mode) {
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session_mode = p_session_mode;
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}
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String WebXRInterfaceJS::get_session_mode() const {
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return session_mode;
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}
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void WebXRInterfaceJS::set_required_features(String p_required_features) {
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required_features = p_required_features;
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}
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String WebXRInterfaceJS::get_required_features() const {
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return required_features;
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}
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void WebXRInterfaceJS::set_optional_features(String p_optional_features) {
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optional_features = p_optional_features;
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}
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String WebXRInterfaceJS::get_optional_features() const {
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return optional_features;
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}
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void WebXRInterfaceJS::set_requested_reference_space_types(String p_requested_reference_space_types) {
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requested_reference_space_types = p_requested_reference_space_types;
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}
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String WebXRInterfaceJS::get_requested_reference_space_types() const {
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return requested_reference_space_types;
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}
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void WebXRInterfaceJS::_set_reference_space_type(String p_reference_space_type) {
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reference_space_type = p_reference_space_type;
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}
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String WebXRInterfaceJS::get_reference_space_type() const {
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return reference_space_type;
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}
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XRPositionalTracker *WebXRInterfaceJS::get_controller(int p_controller_id) const {
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XRServer *xr_server = XRServer::get_singleton();
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ERR_FAIL_NULL_V(xr_server, nullptr);
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return xr_server->find_by_type_and_id(XRServer::TRACKER_CONTROLLER, p_controller_id);
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}
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String WebXRInterfaceJS::get_visibility_state() const {
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char *c_str = godot_webxr_get_visibility_state();
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if (c_str) {
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String visibility_state = String(c_str);
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free(c_str);
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return visibility_state;
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}
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return String();
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}
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PackedVector3Array WebXRInterfaceJS::get_bounds_geometry() const {
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PackedVector3Array ret;
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int *js_bounds = godot_webxr_get_bounds_geometry();
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if (js_bounds) {
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ret.resize(js_bounds[0]);
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for (int i = 0; i < js_bounds[0]; i++) {
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float *js_vector3 = ((float *)js_bounds) + (i * 3) + 1;
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ret.set(i, Vector3(js_vector3[0], js_vector3[1], js_vector3[2]));
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}
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free(js_bounds);
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}
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return ret;
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}
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StringName WebXRInterfaceJS::get_name() const {
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return "WebXR";
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};
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int WebXRInterfaceJS::get_capabilities() const {
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return XRInterface::XR_STEREO;
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};
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bool WebXRInterfaceJS::is_stereo() {
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// @todo WebXR can be mono! So, how do we know? Count the views in the frame?
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return true;
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};
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bool WebXRInterfaceJS::is_initialized() const {
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return (initialized);
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};
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bool WebXRInterfaceJS::initialize() {
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XRServer *xr_server = XRServer::get_singleton();
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ERR_FAIL_NULL_V(xr_server, false);
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if (!initialized) {
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if (!godot_webxr_is_supported()) {
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return false;
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}
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if (requested_reference_space_types.size() == 0) {
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return false;
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}
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// make this our primary interface
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xr_server->set_primary_interface(this);
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initialized = true;
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godot_webxr_initialize(
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session_mode.utf8().get_data(),
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required_features.utf8().get_data(),
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optional_features.utf8().get_data(),
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requested_reference_space_types.utf8().get_data(),
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&_emwebxr_on_session_started,
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&_emwebxr_on_session_ended,
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&_emwebxr_on_session_failed,
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&_emwebxr_on_controller_changed,
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&_emwebxr_on_input_event,
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&_emwebxr_on_simple_event);
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};
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return true;
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};
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void WebXRInterfaceJS::uninitialize() {
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if (initialized) {
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XRServer *xr_server = XRServer::get_singleton();
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if (xr_server != NULL) {
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// no longer our primary interface
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xr_server->clear_primary_interface_if(this);
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}
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godot_webxr_uninitialize();
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reference_space_type = "";
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initialized = false;
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};
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};
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Transform WebXRInterfaceJS::_js_matrix_to_transform(float *p_js_matrix) {
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Transform transform;
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transform.basis.elements[0].x = p_js_matrix[0];
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transform.basis.elements[1].x = p_js_matrix[1];
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transform.basis.elements[2].x = p_js_matrix[2];
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transform.basis.elements[0].y = p_js_matrix[4];
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transform.basis.elements[1].y = p_js_matrix[5];
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transform.basis.elements[2].y = p_js_matrix[6];
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transform.basis.elements[0].z = p_js_matrix[8];
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transform.basis.elements[1].z = p_js_matrix[9];
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transform.basis.elements[2].z = p_js_matrix[10];
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transform.origin.x = p_js_matrix[12];
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transform.origin.y = p_js_matrix[13];
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transform.origin.z = p_js_matrix[14];
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return transform;
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}
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Size2 WebXRInterfaceJS::get_render_targetsize() {
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Size2 target_size;
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int *js_size = godot_webxr_get_render_targetsize();
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if (!initialized || js_size == nullptr) {
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// As a default, use half the window size.
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target_size = DisplayServer::get_singleton()->window_get_size();
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target_size.width /= 2.0;
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return target_size;
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}
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target_size.width = js_size[0];
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target_size.height = js_size[1];
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free(js_size);
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return target_size;
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};
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Transform WebXRInterfaceJS::get_transform_for_eye(XRInterface::Eyes p_eye, const Transform &p_cam_transform) {
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Transform transform_for_eye;
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XRServer *xr_server = XRServer::get_singleton();
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ERR_FAIL_NULL_V(xr_server, transform_for_eye);
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float *js_matrix = godot_webxr_get_transform_for_eye(p_eye);
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if (!initialized || js_matrix == nullptr) {
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transform_for_eye = p_cam_transform;
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return transform_for_eye;
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}
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transform_for_eye = _js_matrix_to_transform(js_matrix);
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free(js_matrix);
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return p_cam_transform * xr_server->get_reference_frame() * transform_for_eye;
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};
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CameraMatrix WebXRInterfaceJS::get_projection_for_eye(XRInterface::Eyes p_eye, real_t p_aspect, real_t p_z_near, real_t p_z_far) {
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CameraMatrix eye;
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float *js_matrix = godot_webxr_get_projection_for_eye(p_eye);
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if (!initialized || js_matrix == nullptr) {
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return eye;
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}
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int k = 0;
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for (int i = 0; i < 4; i++) {
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for (int j = 0; j < 4; j++) {
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eye.matrix[i][j] = js_matrix[k++];
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}
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}
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free(js_matrix);
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// Copied from godot_oculus_mobile's ovr_mobile_session.cpp
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eye.matrix[2][2] = -(p_z_far + p_z_near) / (p_z_far - p_z_near);
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eye.matrix[3][2] = -(2.0f * p_z_far * p_z_near) / (p_z_far - p_z_near);
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return eye;
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}
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unsigned int WebXRInterfaceJS::get_external_texture_for_eye(XRInterface::Eyes p_eye) {
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if (!initialized) {
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return 0;
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}
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return godot_webxr_get_external_texture_for_eye(p_eye);
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}
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void WebXRInterfaceJS::commit_for_eye(XRInterface::Eyes p_eye, RID p_render_target, const Rect2 &p_screen_rect) {
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if (!initialized) {
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return;
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}
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godot_webxr_commit_for_eye(p_eye);
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};
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void WebXRInterfaceJS::process() {
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if (initialized) {
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godot_webxr_sample_controller_data();
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int controller_count = godot_webxr_get_controller_count();
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if (controller_count == 0) {
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return;
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}
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for (int i = 0; i < controller_count; i++) {
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_update_tracker(i);
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}
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};
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};
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void WebXRInterfaceJS::_update_tracker(int p_controller_id) {
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XRServer *xr_server = XRServer::get_singleton();
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ERR_FAIL_NULL(xr_server);
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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)) {
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if (tracker == nullptr) {
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tracker = memnew(XRPositionalTracker);
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tracker->set_type(XRServer::TRACKER_CONTROLLER);
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// Controller id's 0 and 1 are always the left and right hands.
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if (p_controller_id < 2) {
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tracker->set_name(p_controller_id == 0 ? "Left" : "Right");
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tracker->set_hand(p_controller_id == 0 ? XRPositionalTracker::TRACKER_LEFT_HAND : XRPositionalTracker::TRACKER_RIGHT_HAND);
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}
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// Use the ids we're giving to our "virtual" gamepads.
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tracker->set_joy_id(p_controller_id + 100);
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xr_server->add_tracker(tracker);
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}
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Input *input = Input::get_singleton();
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float *tracker_matrix = godot_webxr_get_controller_transform(p_controller_id);
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if (tracker_matrix) {
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Transform transform = _js_matrix_to_transform(tracker_matrix);
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tracker->set_position(transform.origin);
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tracker->set_orientation(transform.basis);
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free(tracker_matrix);
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}
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int *buttons = godot_webxr_get_controller_buttons(p_controller_id);
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if (buttons) {
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for (int i = 0; i < buttons[0]; i++) {
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input->joy_button(p_controller_id + 100, i, *((float *)buttons + (i + 1)));
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}
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free(buttons);
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}
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int *axes = godot_webxr_get_controller_axes(p_controller_id);
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if (axes) {
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for (int i = 0; i < axes[0]; i++) {
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Input::JoyAxis joy_axis;
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joy_axis.min = -1;
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joy_axis.value = *((float *)axes + (i + 1));
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input->joy_axis(p_controller_id + 100, i, joy_axis);
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}
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free(axes);
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}
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} else if (tracker) {
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xr_server->remove_tracker(tracker);
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}
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}
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void WebXRInterfaceJS::_on_controller_changed() {
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// Register "virtual" gamepads with Godot for the ones we get from WebXR.
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godot_webxr_sample_controller_data();
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for (int i = 0; i < 2; i++) {
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bool controller_connected = godot_webxr_is_controller_connected(i);
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if (controllers_state[i] != controller_connected) {
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Input::get_singleton()->joy_connection_changed(i + 100, controller_connected, i == 0 ? "Left" : "Right", "");
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controllers_state[i] = controller_connected;
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}
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}
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}
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void WebXRInterfaceJS::notification(int p_what) {
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// Nothing to do here.
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}
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WebXRInterfaceJS::WebXRInterfaceJS() {
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initialized = false;
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session_mode = "inline";
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requested_reference_space_types = "local";
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};
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WebXRInterfaceJS::~WebXRInterfaceJS() {
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// and make sure we cleanup if we haven't already
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if (initialized) {
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uninitialize();
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};
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};
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#endif // JAVASCRIPT_ENABLED
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