/
inline-session.html
345 lines (300 loc) · 13.2 KB
/
inline-session.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
<!doctype html>
<!--
Copyright 2018 The Immersive Web Community Group
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.
-->
<html>
<head>
<meta charset='utf-8'>
<meta name='viewport' content='width=device-width, initial-scale=1, user-scalable=no'>
<meta name='mobile-web-app-capable' content='yes'>
<meta name='apple-mobile-web-app-capable' content='yes'>
<link rel='icon' type='image/png' sizes='32x32' href='favicon-32x32.png'>
<link rel='icon' type='image/png' sizes='96x96' href='favicon-96x96.png'>
<link rel='stylesheet' href='css/common.css'>
<title>Inline Session</title>
</head>
<body>
<header>
<details open>
<summary>Inline Session</summary>
<p>
This sample demonstrates use of an 'inline' XRSession to present
content on the page prior to entering XR presentation with an
immersive session. The viewer pose can be adjusted by clicking and
dragging with mouse or touch.
<a class="back" href="./">Back</a>
<p>
<input id='vertFOV' value='90' min='30' max='150' step='10' type='range'/><br/>
<label id='vertFOVLabel' for="vertFOV">Vertical FOV: </label>
</p>
</p>
</details>
</header>
<script type="module">
import {WebXRButton} from './js/util/webxr-button.js';
import {Scene} from './js/render/scenes/scene.js';
import {Renderer, createWebGLContext} from './js/render/core/renderer.js';
import {Gltf2Node} from './js/render/nodes/gltf2.js';
import {SkyboxNode} from './js/render/nodes/skybox.js';
import {mat4, vec3, quat} from './js/render/math/gl-matrix.js';
import {QueryArgs} from './js/util/query-args.js';
// If requested, use the polyfill to provide support for mobile devices
// and devices which only support WebVR.
import WebXRPolyfill from './js/third-party/webxr-polyfill/build/webxr-polyfill.module.js';
if (QueryArgs.getBool('usePolyfill', true)) {
let polyfill = new WebXRPolyfill();
}
// Inline sessions, by default, us a vertical field of view of 90 degrees
// when computing projection matrices. If an application wants to use a
// different FoV for inline sessions it can be specified by setting the
// inlineVerticalFieldOfView value in an updateRenderState call. Note that
// this only applies to inline sessions, and attempting to set that value
// for an immersive session will throw an error.
let inlineSession = null;
let fov = document.getElementById('vertFOV');
let fovLabel = document.getElementById('vertFOVLabel');
function updateFov() {
let value = parseFloat(fov.value);
// The inlineVerticalFieldOfView is specified in radians.
let radValue = value * (Math.PI / 180);
if (inlineSession) {
// As with any values set with updateRenderState, this will take
// effect on the next frame.
inlineSession.updateRenderState({
inlineVerticalFieldOfView: radValue
});
}
// Set the label on the page
let label = `Vertical FOV: ${value} degrees`;
if (value == 90) {
label += ' (default)';
}
fovLabel.textContent = label;
}
fov.addEventListener('change', updateFov);
// XR globals.
let xrButton = null;
let xrImmersiveRefSpace = null;
let xrInlineRefSpace = null;
// WebGL scene globals.
let gl = null;
let renderer = null;
let scene = new Scene();
let solarSystem = new Gltf2Node({url: 'media/gltf/space/space.gltf'});
scene.addNode(solarSystem);
scene.addNode(new SkyboxNode({url: 'media/textures/milky-way-4k.png'}));
function initXR() {
xrButton = new WebXRButton({
onRequestSession: onRequestSession,
onEndSession: onEndSession
});
document.querySelector('header').appendChild(xrButton.domElement);
if (navigator.xr) {
navigator.xr.isSessionSupported('immersive-vr').then((supported) => {
xrButton.enabled = supported;
});
// Start up an inline session, which should always be supported on
// browsers that support WebXR regardless of the available hardware.
navigator.xr.requestSession('inline').then((session) => {
inlineSession = session;
onSessionStarted(session);
updateFov();
});
}
}
function onRequestSession() {
return navigator.xr.requestSession('immersive-vr').then((session) => {
xrButton.setSession(session);
// Set a flag on the session so we can differentiate it from the
// inline session.
session.isImmersive = true;
onSessionStarted(session);
});
}
function onSessionStarted(session) {
session.addEventListener('end', onSessionEnded);
if (!gl) {
gl = createWebGLContext({
xrCompatible: true
});
// In order for an inline session to be used we must attach the WebGL
// canvas to the document, which will serve as the output surface for
// the results of the inline session's rendering.
document.body.appendChild(gl.canvas);
// The canvas is synced with the window size via CSS, but we still
// need to update the width and height attributes in order to keep
// the default framebuffer resolution in-sync.
function onResize() {
gl.canvas.width = gl.canvas.clientWidth * window.devicePixelRatio;
gl.canvas.height = gl.canvas.clientHeight * window.devicePixelRatio;
}
window.addEventListener('resize', onResize);
onResize();
// Installs the listeners necessary to allow users to look around with
// inline sessions using the mouse or touch.
addInlineViewListeners(gl.canvas);
renderer = new Renderer(gl);
scene.setRenderer(renderer);
}
// WebGL layers for inline sessions won't allocate their own framebuffer,
// which causes gl commands to naturally execute against the default
// framebuffer while still using the canvas dimensions to compute
// viewports and projection matrices.
let glLayer = new XRWebGLLayer(session, gl);
session.updateRenderState({
baseLayer: glLayer
});
let refSpaceType = session.isImmersive ? 'local' : 'viewer';
session.requestReferenceSpace(refSpaceType).then((refSpace) => {
// Since we're dealing with multiple sessions now we need to track
// which XRReferenceSpace is associated with which XRSession.
if (session.isImmersive) {
xrImmersiveRefSpace = refSpace;
} else {
xrInlineRefSpace = refSpace;
}
session.requestAnimationFrame(onXRFrame);
});
}
function onEndSession(session) {
session.end();
}
function onSessionEnded(event) {
// Only reset the button when the immersive session ends.
if (event.session.isImmersive) {
xrButton.setSession(null);
}
}
// Called every time a XRSession requests that a new frame be drawn.
function onXRFrame(t, frame) {
let session = frame.session;
// Ensure that we're using the right frame of reference for the session.
let refSpace = session.isImmersive ?
xrImmersiveRefSpace :
xrInlineRefSpace;
// Account for the click-and-drag mouse movement or touch movement when
// calculating the viewer pose for inline sessions.
if (!session.isImmersive) {
refSpace = getAdjustedRefSpace(refSpace);
}
let pose = frame.getViewerPose(refSpace);
scene.startFrame();
session.requestAnimationFrame(onXRFrame);
if (pose) {
let glLayer = session.renderState.baseLayer;
gl.bindFramebuffer(gl.FRAMEBUFFER, glLayer.framebuffer);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
for (let view of pose.views) {
let viewport = glLayer.getViewport(view);
gl.viewport(viewport.x, viewport.y,
viewport.width, viewport.height);
scene.draw(view.projectionMatrix, view.transform);
}
}
scene.endFrame();
}
// Inline view adjustment code
// Allow the user to click and drag the mouse (or touch and drag the
// screen on handheld devices) to adjust the viewer pose for inline
// sessions. Samples after this one will hide this logic with a utility
// class (InlineViewerHelper).
let lookYaw = 0;
let lookPitch = 0;
const LOOK_SPEED = 0.0025;
// XRReferenceSpace offset is immutable, so return a new reference space
// that has an updated orientation.
function getAdjustedRefSpace(refSpace) {
// Represent the rotational component of the reference space as a
// quaternion.
let invOrientation = quat.create();
quat.rotateX(invOrientation, invOrientation, -lookPitch);
quat.rotateY(invOrientation, invOrientation, -lookYaw);
let xform = new XRRigidTransform(
{x: 0, y: 0, z: 0},
{x: invOrientation[0], y: invOrientation[1], z: invOrientation[2], w: invOrientation[3]});
return refSpace.getOffsetReferenceSpace(xform);
}
function rotateView(dx, dy) {
lookYaw += dx * LOOK_SPEED;
lookPitch += dy * LOOK_SPEED;
if (lookPitch < -Math.PI*0.5)
lookPitch = -Math.PI*0.5;
if (lookPitch > Math.PI*0.5)
lookPitch = Math.PI*0.5;
}
// Make the canvas listen for mouse and touch events so that we can
// adjust the viewer pose accordingly in inline sessions.
function addInlineViewListeners(canvas) {
canvas.addEventListener('mousemove', (event) => {
// Only rotate when the right button is pressed
if (event.buttons && 2) {
rotateView(event.movementX, event.movementY);
}
});
// Keep track of touch-related state so that users can touch and drag on
// the canvas to adjust the viewer pose in an inline session.
let primaryTouch = undefined;
let prevTouchX = undefined;
let prevTouchY = undefined;
// Keep track of all active touches, but only use the first touch to
// adjust the viewer pose.
canvas.addEventListener("touchstart", (event) => {
if (primaryTouch == undefined) {
let touch = event.changedTouches[0];
primaryTouch = touch.identifier;
prevTouchX = touch.pageX;
prevTouchY = touch.pageY;
}
});
// Update the set of active touches now that one or more touches
// finished. If the primary touch just finished, update the viewer pose
// based on the final touch movement.
canvas.addEventListener("touchend", (event) => {
for (let touch of event.changedTouches) {
if (primaryTouch == touch.identifier) {
primaryTouch = undefined;
rotateView(touch.pageX - prevTouchX, touch.pageY - prevTouchY);
}
}
});
// Update the set of active touches now that one or more touches was
// cancelled. Don't update the viewer pose when the primary touch was
// cancelled.
canvas.addEventListener("touchcancel", (event) => {
for (let touch of event.changedTouches) {
if (primaryTouch == touch.identifier) {
primaryTouch = undefined;
}
}
});
// Only use the delta between the most recent and previous events for
// the primary touch. Ignore the other touches.
canvas.addEventListener("touchmove", (event) => {
for (let touch of event.changedTouches) {
if (primaryTouch == touch.identifier) {
rotateView(touch.pageX - prevTouchX, touch.pageY - prevTouchY);
prevTouchX = touch.pageX;
prevTouchY = touch.pageY;
}
}
});
}
// Start the XR application.
initXR();
</script>
</body>
</html>