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input-tracking.html
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input-tracking.html
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<!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,
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The above copyright notice and this permission notice shall be included in all
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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>Input Tracking</title>
</head>
<body>
<header>
<details open>
<summary>Input Tracking</summary>
<p>
This sample demonstrates basic tracking and rendering of
XRInputSources. It does not respond to button presses or other
controller interactions.
<a class="back" href="./">Back</a>
</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 {vec3} from './js/render/math/gl-matrix.js';
import {Ray} from './js/render/math/ray.js';
import {InlineViewerHelper} from './js/util/inline-viewer-helper.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();
}
// XR globals.
let xrButton = null;
let xrImmersiveRefSpace = null;
let inlineViewerHelper = null;
// WebGL scene globals.
let gl = null;
let renderer = null;
let scene = new Scene();
scene.addNode(new Gltf2Node({url: 'media/gltf/cave/cave.gltf'}));
scene.addNode(new SkyboxNode({url: 'media/textures/eilenriede-park-2k.png'}));
scene.standingStats(true);
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;
});
navigator.xr.requestSession('inline').then(onSessionStarted);
}
}
function initGL() {
if (gl)
return;
gl = createWebGLContext({
xrCompatible: true
});
// Note: If you don't want dragging on the canvas to do things like
// scroll or pull-to-refresh, you'll want to set touch-action: none;
// on the canvas' CSS style, which this page does in common.css
document.body.appendChild(gl.canvas);
function onResize() {
gl.canvas.width = gl.canvas.clientWidth * window.devicePixelRatio;
gl.canvas.height = gl.canvas.clientHeight * window.devicePixelRatio;
}
window.addEventListener('resize', onResize);
onResize();
renderer = new Renderer(gl);
scene.setRenderer(renderer);
// Loads a generic controller meshes.
scene.inputRenderer.setControllerMesh(new Gltf2Node({url: 'media/gltf/controller/controller.gltf'}), 'right');
scene.inputRenderer.setControllerMesh(new Gltf2Node({url: 'media/gltf/controller/controller-left.gltf'}), 'left');
}
function onRequestSession() {
return navigator.xr.requestSession('immersive-vr', {
requiredFeatures: ['local-floor']
}).then((session) => {
xrButton.setSession(session);
session.isImmersive = true;
onSessionStarted(session);
});
}
function onSessionStarted(session) {
session.addEventListener('end', onSessionEnded);
initGL();
let glLayer = new XRWebGLLayer(session, gl);
session.updateRenderState({ baseLayer: glLayer });
let refSpaceType = session.isImmersive ? 'local-floor' : 'viewer';
session.requestReferenceSpace(refSpaceType).then((refSpace) => {
if (session.isImmersive) {
xrImmersiveRefSpace = refSpace;
} else {
inlineViewerHelper = new InlineViewerHelper(gl.canvas, refSpace);
inlineViewerHelper.setHeight(1.6);
}
session.requestAnimationFrame(onXRFrame);
});
}
function onEndSession(session) {
session.end();
}
function onSessionEnded(event) {
if (event.session.isImmersive) {
xrButton.setSession(null);
}
}
function updateInputSources(session, frame, refSpace) {
for (let inputSource of session.inputSources) {
let targetRayPose = frame.getPose(inputSource.targetRaySpace, refSpace);
// We may not get a pose back in cases where the input source has lost
// tracking or does not know where it is relative to the given frame
// of reference.
if (!targetRayPose) {
continue;
}
if (inputSource.targetRayMode == 'tracked-pointer') {
// If we have a pointer matrix and the pointer origin is the users
// hand (as opposed to their head or the screen) use it to render
// a ray coming out of the input device to indicate the pointer
// direction.
scene.inputRenderer.addLaserPointer(targetRayPose.transform);
}
// If we have a pointer matrix we can also use it to render a cursor
// for both handheld and gaze-based input sources.
// Statically render the cursor 2 meters down the ray since we're
// not calculating any intersections in this sample.
let targetRay = new Ray(targetRayPose.transform);
let cursorDistance = 2.0;
let cursorPos = vec3.fromValues(
targetRay.origin.x,
targetRay.origin.y,
targetRay.origin.z
);
vec3.add(cursorPos, cursorPos, [
targetRay.direction.x * cursorDistance,
targetRay.direction.y * cursorDistance,
targetRay.direction.z * cursorDistance,
]);
// vec3.transformMat4(cursorPos, cursorPos, inputPose.targetRay.transformMatrix);
scene.inputRenderer.addCursor(cursorPos);
if (inputSource.gripSpace) {
let gripPose = frame.getPose(inputSource.gripSpace, refSpace);
if (gripPose) {
// If we have a grip pose use it to render a mesh showing the
// position of the controller.
scene.inputRenderer.addController(gripPose.transform.matrix, inputSource.handedness, inputSource.profiles[0]);
}
}
}
}
function onXRFrame(t, frame) {
let session = frame.session;
let refSpace = session.isImmersive ?
xrImmersiveRefSpace :
inlineViewerHelper.referenceSpace;
let pose = frame.getViewerPose(refSpace);
scene.startFrame();
session.requestAnimationFrame(onXRFrame);
updateInputSources(session, frame, refSpace);
scene.drawXRFrame(frame, pose);
scene.endFrame();
}
// Start the XR application.
initXR();
</script>
</body>
</html>