528 lines
19 KiB
JavaScript
528 lines
19 KiB
JavaScript
/*************************************************************************/
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/* library_godot_webxr.js */
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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) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 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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const GodotWebXR = {
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$GodotWebXR__deps: ['$Browser', '$GL', '$GodotRuntime'],
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$GodotWebXR: {
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gl: null,
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session: null,
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space: null,
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frame: null,
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pose: null,
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// Monkey-patch the requestAnimationFrame() used by Emscripten for the main
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// loop, so that we can swap it out for XRSession.requestAnimationFrame()
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// when an XR session is started.
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orig_requestAnimationFrame: null,
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requestAnimationFrame: (callback) => {
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if (GodotWebXR.session && GodotWebXR.space) {
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const onFrame = function (time, frame) {
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GodotWebXR.frame = frame;
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GodotWebXR.pose = frame.getViewerPose(GodotWebXR.space);
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callback(time);
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GodotWebXR.frame = null;
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GodotWebXR.pose = null;
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};
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GodotWebXR.session.requestAnimationFrame(onFrame);
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} else {
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GodotWebXR.orig_requestAnimationFrame(callback);
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}
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},
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monkeyPatchRequestAnimationFrame: (enable) => {
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if (GodotWebXR.orig_requestAnimationFrame === null) {
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GodotWebXR.orig_requestAnimationFrame = Browser.requestAnimationFrame;
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}
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Browser.requestAnimationFrame = enable
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? GodotWebXR.requestAnimationFrame : GodotWebXR.orig_requestAnimationFrame;
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},
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pauseResumeMainLoop: () => {
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// Once both GodotWebXR.session and GodotWebXR.space are set or
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// unset, our monkey-patched requestAnimationFrame() should be
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// enabled or disabled. When using the WebXR API Emulator, this
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// gets picked up automatically, however, in the Oculus Browser
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// on the Quest, we need to pause and resume the main loop.
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Browser.mainLoop.pause();
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window.setTimeout(function () {
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Browser.mainLoop.resume();
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}, 0);
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},
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// Holds the controllers list between function calls.
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controllers: [],
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// Updates controllers array, where the left hand (or sole tracker) is
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// the first element, and the right hand is the second element, and any
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// others placed at the 3rd position and up.
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sampleControllers: () => {
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if (!GodotWebXR.session || !GodotWebXR.frame) {
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return;
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}
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let other_index = 2;
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const controllers = [];
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GodotWebXR.session.inputSources.forEach((input_source) => {
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if (input_source.targetRayMode === 'tracked-pointer') {
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if (input_source.handedness === 'right') {
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controllers[1] = input_source;
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} else if (input_source.handedness === 'left' || !controllers[0]) {
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controllers[0] = input_source;
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}
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} else {
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controllers[other_index++] = input_source;
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}
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});
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GodotWebXR.controllers = controllers;
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},
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getControllerId: (input_source) => GodotWebXR.controllers.indexOf(input_source),
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},
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godot_webxr_is_supported__proxy: 'sync',
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godot_webxr_is_supported__sig: 'i',
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godot_webxr_is_supported: function () {
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return !!navigator.xr;
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},
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godot_webxr_is_session_supported__proxy: 'sync',
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godot_webxr_is_session_supported__sig: 'vii',
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godot_webxr_is_session_supported: function (p_session_mode, p_callback) {
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const session_mode = GodotRuntime.parseString(p_session_mode);
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const cb = GodotRuntime.get_func(p_callback);
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if (navigator.xr) {
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navigator.xr.isSessionSupported(session_mode).then(function (supported) {
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const c_str = GodotRuntime.allocString(session_mode);
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cb(c_str, supported ? 1 : 0);
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GodotRuntime.free(c_str);
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});
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} else {
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const c_str = GodotRuntime.allocString(session_mode);
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cb(c_str, 0);
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GodotRuntime.free(c_str);
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}
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},
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godot_webxr_initialize__deps: ['emscripten_webgl_get_current_context'],
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godot_webxr_initialize__proxy: 'sync',
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godot_webxr_initialize__sig: 'viiiiiiiiii',
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godot_webxr_initialize: function (p_session_mode, p_required_features, p_optional_features, p_requested_reference_spaces, p_on_session_started, p_on_session_ended, p_on_session_failed, p_on_controller_changed, p_on_input_event, p_on_simple_event) {
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GodotWebXR.monkeyPatchRequestAnimationFrame(true);
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const session_mode = GodotRuntime.parseString(p_session_mode);
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const required_features = GodotRuntime.parseString(p_required_features).split(',').map((s) => s.trim()).filter((s) => s !== '');
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const optional_features = GodotRuntime.parseString(p_optional_features).split(',').map((s) => s.trim()).filter((s) => s !== '');
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const requested_reference_space_types = GodotRuntime.parseString(p_requested_reference_spaces).split(',').map((s) => s.trim());
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const onstarted = GodotRuntime.get_func(p_on_session_started);
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const onended = GodotRuntime.get_func(p_on_session_ended);
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const onfailed = GodotRuntime.get_func(p_on_session_failed);
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const oncontroller = GodotRuntime.get_func(p_on_controller_changed);
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const oninputevent = GodotRuntime.get_func(p_on_input_event);
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const onsimpleevent = GodotRuntime.get_func(p_on_simple_event);
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const session_init = {};
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if (required_features.length > 0) {
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session_init['requiredFeatures'] = required_features;
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}
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if (optional_features.length > 0) {
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session_init['optionalFeatures'] = optional_features;
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}
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navigator.xr.requestSession(session_mode, session_init).then(function (session) {
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GodotWebXR.session = session;
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session.addEventListener('end', function (evt) {
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onended();
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});
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session.addEventListener('inputsourceschange', function (evt) {
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let controller_changed = false;
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[evt.added, evt.removed].forEach((lst) => {
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lst.forEach((input_source) => {
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if (input_source.targetRayMode === 'tracked-pointer') {
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controller_changed = true;
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}
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});
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});
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if (controller_changed) {
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oncontroller();
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}
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});
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['selectstart', 'select', 'selectend', 'squeezestart', 'squeeze', 'squeezeend'].forEach((input_event) => {
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session.addEventListener(input_event, function (evt) {
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const c_str = GodotRuntime.allocString(input_event);
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oninputevent(c_str, GodotWebXR.getControllerId(evt.inputSource));
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GodotRuntime.free(c_str);
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});
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});
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session.addEventListener('visibilitychange', function (evt) {
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const c_str = GodotRuntime.allocString('visibility_state_changed');
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onsimpleevent(c_str);
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GodotRuntime.free(c_str);
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});
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const gl_context_handle = _emscripten_webgl_get_current_context(); // eslint-disable-line no-undef
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const gl = GL.getContext(gl_context_handle).GLctx;
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GodotWebXR.gl = gl;
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gl.makeXRCompatible().then(function () {
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session.updateRenderState({
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baseLayer: new XRWebGLLayer(session, gl),
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});
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function onReferenceSpaceSuccess(reference_space, reference_space_type) {
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GodotWebXR.space = reference_space;
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// Using reference_space.addEventListener() crashes when
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// using the polyfill with the WebXR Emulator extension,
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// so we set the event property instead.
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reference_space.onreset = function (evt) {
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const c_str = GodotRuntime.allocString('reference_space_reset');
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onsimpleevent(c_str);
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GodotRuntime.free(c_str);
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};
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// Now that both GodotWebXR.session and GodotWebXR.space are
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// set, we need to pause and resume the main loop for the XR
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// main loop to kick in.
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GodotWebXR.pauseResumeMainLoop();
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// Call in setTimeout() so that errors in the onstarted()
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// callback don't bubble up here and cause Godot to try the
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// next reference space.
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window.setTimeout(function () {
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const c_str = GodotRuntime.allocString(reference_space_type);
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onstarted(c_str);
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GodotRuntime.free(c_str);
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}, 0);
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}
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function requestReferenceSpace() {
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const reference_space_type = requested_reference_space_types.shift();
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session.requestReferenceSpace(reference_space_type)
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.then((refSpace) => {
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onReferenceSpaceSuccess(refSpace, reference_space_type);
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})
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.catch(() => {
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if (requested_reference_space_types.length === 0) {
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const c_str = GodotRuntime.allocString('Unable to get any of the requested reference space types');
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onfailed(c_str);
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GodotRuntime.free(c_str);
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} else {
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requestReferenceSpace();
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}
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});
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}
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requestReferenceSpace();
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}).catch(function (error) {
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const c_str = GodotRuntime.allocString(`Unable to make WebGL context compatible with WebXR: ${error}`);
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onfailed(c_str);
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GodotRuntime.free(c_str);
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});
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}).catch(function (error) {
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const c_str = GodotRuntime.allocString(`Unable to start session: ${error}`);
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onfailed(c_str);
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GodotRuntime.free(c_str);
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});
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},
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godot_webxr_uninitialize__proxy: 'sync',
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godot_webxr_uninitialize__sig: 'v',
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godot_webxr_uninitialize: function () {
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if (GodotWebXR.session) {
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GodotWebXR.session.end()
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// Prevent exception when session has already ended.
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.catch((e) => { });
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}
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GodotWebXR.session = null;
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GodotWebXR.space = null;
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GodotWebXR.frame = null;
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GodotWebXR.pose = null;
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// Disable the monkey-patched window.requestAnimationFrame() and
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// pause/restart the main loop to activate it on all platforms.
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GodotWebXR.monkeyPatchRequestAnimationFrame(false);
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GodotWebXR.pauseResumeMainLoop();
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},
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godot_webxr_get_view_count__proxy: 'sync',
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godot_webxr_get_view_count__sig: 'i',
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godot_webxr_get_view_count: function () {
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if (!GodotWebXR.session || !GodotWebXR.pose) {
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return 0;
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}
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return GodotWebXR.pose.views.length;
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},
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godot_webxr_get_render_target_size__proxy: 'sync',
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godot_webxr_get_render_target_size__sig: 'i',
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godot_webxr_get_render_target_size: function () {
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if (!GodotWebXR.session || !GodotWebXR.pose) {
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return 0;
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}
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const glLayer = GodotWebXR.session.renderState.baseLayer;
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const view = GodotWebXR.pose.views[0];
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const viewport = glLayer.getViewport(view);
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const buf = GodotRuntime.malloc(2 * 4);
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GodotRuntime.setHeapValue(buf + 0, viewport.width, 'i32');
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GodotRuntime.setHeapValue(buf + 4, viewport.height, 'i32');
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return buf;
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},
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godot_webxr_get_transform_for_eye__proxy: 'sync',
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godot_webxr_get_transform_for_eye__sig: 'ii',
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godot_webxr_get_transform_for_eye: function (p_eye) {
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if (!GodotWebXR.session || !GodotWebXR.pose) {
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return 0;
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}
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const views = GodotWebXR.pose.views;
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let matrix;
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if (p_eye === 0) {
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matrix = GodotWebXR.pose.transform.matrix;
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} else {
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matrix = views[p_eye - 1].transform.matrix;
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}
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const buf = GodotRuntime.malloc(16 * 4);
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for (let i = 0; i < 16; i++) {
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GodotRuntime.setHeapValue(buf + (i * 4), matrix[i], 'float');
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}
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return buf;
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},
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godot_webxr_get_projection_for_eye__proxy: 'sync',
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godot_webxr_get_projection_for_eye__sig: 'ii',
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godot_webxr_get_projection_for_eye: function (p_eye) {
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if (!GodotWebXR.session || !GodotWebXR.pose) {
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return 0;
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}
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const view_index = (p_eye === 2 /* ARVRInterface::EYE_RIGHT */) ? 1 : 0;
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const matrix = GodotWebXR.pose.views[view_index].projectionMatrix;
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const buf = GodotRuntime.malloc(16 * 4);
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for (let i = 0; i < 16; i++) {
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GodotRuntime.setHeapValue(buf + (i * 4), matrix[i], 'float');
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}
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return buf;
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},
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godot_webxr_commit__proxy: 'sync',
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godot_webxr_commit__sig: 'vi',
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godot_webxr_commit: function (p_texture) {
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if (!GodotWebXR.session || !GodotWebXR.pose) {
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return;
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}
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const glLayer = GodotWebXR.session.renderState.baseLayer;
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const views = GodotWebXR.pose.views;
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const gl = GodotWebXR.gl;
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const texture = GL.textures[p_texture];
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const orig_framebuffer = gl.getParameter(gl.FRAMEBUFFER_BINDING);
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const orig_read_framebuffer = gl.getParameter(gl.READ_FRAMEBUFFER_BINDING);
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const orig_read_buffer = gl.getParameter(gl.READ_BUFFER);
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const orig_draw_framebuffer = gl.getParameter(gl.DRAW_FRAMEBUFFER_BINDING);
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// Copy from Godot render target into framebuffer from WebXR.
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gl.bindFramebuffer(gl.FRAMEBUFFER, null);
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for (let i = 0; i < views.length; i++) {
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const viewport = glLayer.getViewport(views[i]);
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const read_fbo = gl.createFramebuffer();
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gl.bindFramebuffer(gl.READ_FRAMEBUFFER, read_fbo);
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if (views.length > 1) {
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gl.framebufferTextureLayer(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, texture, 0, i);
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} else {
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gl.framebufferTexture2D(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);
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}
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gl.readBuffer(gl.COLOR_ATTACHMENT0);
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gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, glLayer.framebuffer);
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// Flip Y upside down on destination.
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gl.blitFramebuffer(0, 0, viewport.width, viewport.height,
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viewport.x, viewport.y + viewport.height, viewport.x + viewport.width, viewport.y,
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gl.COLOR_BUFFER_BIT, gl.NEAREST);
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gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);
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gl.deleteFramebuffer(read_fbo);
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}
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// Restore state.
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gl.bindFramebuffer(gl.FRAMEBUFFER, orig_framebuffer);
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gl.bindFramebuffer(gl.READ_FRAMEBUFFER, orig_read_framebuffer);
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gl.readBuffer(orig_read_buffer);
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gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, orig_draw_framebuffer);
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},
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godot_webxr_sample_controller_data__proxy: 'sync',
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godot_webxr_sample_controller_data__sig: 'v',
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godot_webxr_sample_controller_data: function () {
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GodotWebXR.sampleControllers();
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},
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godot_webxr_get_controller_count__proxy: 'sync',
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godot_webxr_get_controller_count__sig: 'i',
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godot_webxr_get_controller_count: function () {
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if (!GodotWebXR.session || !GodotWebXR.frame) {
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return 0;
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}
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return GodotWebXR.controllers.length;
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},
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godot_webxr_is_controller_connected__proxy: 'sync',
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godot_webxr_is_controller_connected__sig: 'ii',
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godot_webxr_is_controller_connected: function (p_controller) {
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if (!GodotWebXR.session || !GodotWebXR.frame) {
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return false;
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}
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return !!GodotWebXR.controllers[p_controller];
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},
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godot_webxr_get_controller_transform__proxy: 'sync',
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godot_webxr_get_controller_transform__sig: 'ii',
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godot_webxr_get_controller_transform: function (p_controller) {
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if (!GodotWebXR.session || !GodotWebXR.frame) {
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return 0;
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}
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const controller = GodotWebXR.controllers[p_controller];
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if (!controller) {
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return 0;
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}
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const frame = GodotWebXR.frame;
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const space = GodotWebXR.space;
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const pose = frame.getPose(controller.targetRaySpace, space);
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if (!pose) {
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// This can mean that the controller lost tracking.
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return 0;
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}
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const matrix = pose.transform.matrix;
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const buf = GodotRuntime.malloc(16 * 4);
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for (let i = 0; i < 16; i++) {
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GodotRuntime.setHeapValue(buf + (i * 4), matrix[i], 'float');
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}
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return buf;
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},
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godot_webxr_get_controller_buttons__proxy: 'sync',
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godot_webxr_get_controller_buttons__sig: 'ii',
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godot_webxr_get_controller_buttons: function (p_controller) {
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if (GodotWebXR.controllers.length === 0) {
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return 0;
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}
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const controller = GodotWebXR.controllers[p_controller];
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if (!controller || !controller.gamepad) {
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return 0;
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}
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const button_count = controller.gamepad.buttons.length;
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const buf = GodotRuntime.malloc((button_count + 1) * 4);
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GodotRuntime.setHeapValue(buf, button_count, 'i32');
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for (let i = 0; i < button_count; i++) {
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|
GodotRuntime.setHeapValue(buf + 4 + (i * 4), controller.gamepad.buttons[i].value, 'float');
|
|
}
|
|
return buf;
|
|
},
|
|
|
|
godot_webxr_get_controller_axes__proxy: 'sync',
|
|
godot_webxr_get_controller_axes__sig: 'ii',
|
|
godot_webxr_get_controller_axes: function (p_controller) {
|
|
if (GodotWebXR.controllers.length === 0) {
|
|
return 0;
|
|
}
|
|
|
|
const controller = GodotWebXR.controllers[p_controller];
|
|
if (!controller || !controller.gamepad) {
|
|
return 0;
|
|
}
|
|
|
|
const axes_count = controller.gamepad.axes.length;
|
|
|
|
const buf = GodotRuntime.malloc((axes_count + 1) * 4);
|
|
GodotRuntime.setHeapValue(buf, axes_count, 'i32');
|
|
for (let i = 0; i < axes_count; i++) {
|
|
let value = controller.gamepad.axes[i];
|
|
if (i === 1 || i === 3) {
|
|
// Invert the Y-axis on thumbsticks and trackpads, in order to
|
|
// match OpenXR and other XR platform SDKs.
|
|
value *= -1.0;
|
|
}
|
|
GodotRuntime.setHeapValue(buf + 4 + (i * 4), value, 'float');
|
|
}
|
|
return buf;
|
|
},
|
|
|
|
godot_webxr_get_visibility_state__proxy: 'sync',
|
|
godot_webxr_get_visibility_state__sig: 'i',
|
|
godot_webxr_get_visibility_state: function () {
|
|
if (!GodotWebXR.session || !GodotWebXR.session.visibilityState) {
|
|
return 0;
|
|
}
|
|
|
|
return GodotRuntime.allocString(GodotWebXR.session.visibilityState);
|
|
},
|
|
|
|
godot_webxr_get_bounds_geometry__proxy: 'sync',
|
|
godot_webxr_get_bounds_geometry__sig: 'i',
|
|
godot_webxr_get_bounds_geometry: function () {
|
|
if (!GodotWebXR.space || !GodotWebXR.space.boundsGeometry) {
|
|
return 0;
|
|
}
|
|
|
|
const point_count = GodotWebXR.space.boundsGeometry.length;
|
|
if (point_count === 0) {
|
|
return 0;
|
|
}
|
|
|
|
const buf = GodotRuntime.malloc(((point_count * 3) + 1) * 4);
|
|
GodotRuntime.setHeapValue(buf, point_count, 'i32');
|
|
for (let i = 0; i < point_count; i++) {
|
|
const point = GodotWebXR.space.boundsGeometry[i];
|
|
GodotRuntime.setHeapValue(buf + ((i * 3) + 1) * 4, point.x, 'float');
|
|
GodotRuntime.setHeapValue(buf + ((i * 3) + 2) * 4, point.y, 'float');
|
|
GodotRuntime.setHeapValue(buf + ((i * 3) + 3) * 4, point.z, 'float');
|
|
}
|
|
|
|
return buf;
|
|
},
|
|
};
|
|
|
|
autoAddDeps(GodotWebXR, '$GodotWebXR');
|
|
mergeInto(LibraryManager.library, GodotWebXR);
|