-
Notifications
You must be signed in to change notification settings - Fork 6
/
projlayertrace.html
188 lines (158 loc) · 7.07 KB
/
projlayertrace.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
<!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>Test for projection layer attributes</title>
</head>
<body>
<header>
<details open>
<summary>projection layer attributes</summary>
<p>
This sample tests projection layer attributes
<a class="back" href="./">Back</a>
</p>
<button id="xr-button" disabled>XR not found</button>
</details>
</header>
<main style='text-align: center;'>
<p>Click 'Enter VR' to see content</p>
</main>
<script>
(function () {
'use strict';
// XR globals.
let xrButton = document.getElementById('xr-button');
let xrSession = null;
let xrRefSpace = null;
let xrGLFactory = null;
let xrFramebuffer = null;
let ttt;
// WebGL scene globals.
let gl = null;
// Checks to see if WebXR is available and, if so, requests an XRDevice
// that is connected to the system and tests it to ensure it supports the
// desired session options.
function initXR() {
// Is WebXR available on this UA?
if (navigator.xr) {
// If the device allows creation of exclusive sessions set it as the
// target of the 'Enter XR' button.
navigator.xr.isSessionSupported('immersive-vr').then((supported) => {
if (supported) {
// Updates the button to start an XR session when clicked.
xrButton.addEventListener('click', onButtonClicked);
xrButton.textContent = 'Show single layer';
xrButton.disabled = false;
}
});
}
}
// Called when the user clicks the button to enter XR. If we don't have a
// session we'll request one, and if we do have a session we'll end it.
function onButtonClicked() {
if (!xrSession) {
navigator.xr.requestSession('immersive-vr', {requiredFeatures: ['layers']}).then(onSessionStarted);
} else {
xrSession.end();
}
}
// Called when we've successfully acquired a XRSession. In response we
// will set up the necessary session state and kick off the frame loop.
function onSessionStarted(session) {
xrSession = session;
xrButton.textContent = 'Exit VR';
// Listen for the sessions 'end' event so we can respond if the user
// or UA ends the session for any reason.
session.addEventListener('end', onSessionEnded);
// Create a WebGL context to render with, initialized to be compatible
// with the XRDisplay we're presenting to.
let canvas = document.createElement('canvas');
gl = canvas.getContext('webgl2', { xrCompatible: true });
xrFramebuffer = gl.createFramebuffer();
xrGLFactory = new XRWebGLBinding(session, gl);
let layer = xrGLFactory.createProjectionLayer({textureType: "texture"});
session.updateRenderState({ layers: [layer] });
session.requestReferenceSpace('local').then((refSpace) => {
xrRefSpace = refSpace;
// Inform the session that we're ready to begin drawing.
session.requestAnimationFrame(onXRFrame);
});
}
// Called either when the user has explicitly ended the session by calling
// session.end() or when the UA has ended the session for any reason.
// At this point the session object is no longer usable and should be
// discarded.
function onSessionEnded(event) {
xrSession = null;
xrButton.textContent = 'Enter VR';
// In this simple case discard the WebGL context too, since we're not
// rendering anything else to the screen with it.
gl = null;
}
// Called every time the XRSession requests that a new frame be drawn.
function onXRFrame(time, frame) {
let session = frame.session;
// Inform the session that we're ready for the next frame.
session.requestAnimationFrame(onXRFrame);
// Get the XRDevice pose relative to the reference space we created
// earlier.
let pose = frame.getViewerPose(xrRefSpace);
// Getting the pose may fail if, for example, tracking is lost. So we
// have to check to make sure that we got a valid pose before attempting
// to render with it. If not in this case we'll just leave the
// framebuffer cleared, so tracking loss means the scene will simply
// disappear.
if (pose) {
const layer = session.renderState.layers[0];
for (let view of pose.views) {
let subimage = xrGLFactory.getViewSubImage(layer, view);
gl.bindFramebuffer(gl.FRAMEBUFFER, xrFramebuffer);
gl.viewport(subimage.viewport.x,
subimage.viewport.y,
subimage.viewport.width,
subimage.viewport.height);
gl.framebufferTexture2D(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, subimage.colorTexture, 0);
gl.clearColor(1, 0, 0, 1);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
gl.bindFramebuffer(gl.FRAMEBUFFER, xrFramebuffer);
gl.viewport(subimage.viewport.x,
subimage.viewport.y,
subimage.viewport.width,
subimage.viewport.height);
gl.framebufferTexture2D(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, subimage.colorTexture, 0);
gl.clearColor(0, 1, 0, 1);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
}
}
}
// Start the XR application.
initXR();
})();
</script>
</body>
</html>