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<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 Selection</title>
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Enables WebXR for all visitors by default during the trial period -->
<meta http-equiv="origin-trial" content="AsRrvyQjAl9rU6y9LjRT0zG1MSdLR8WLtEtvZlroYAASlD4y5T0pWay1oL+NR9g6oxoahdrVHq3YEz+dVK1cBwMAAABfeyJvcmlnaW4iOiJodHRwczovL2ltbWVyc2l2ZS13ZWIuZ2l0aHViLmlvOjQ0MyIsImZlYXR1cmUiOiJXZWJYUkRldmljZU03NiIsImV4cGlyeSI6MTU3MDA1Mjg3OH0=">
</head>
<body>
<header>
<details open>
<summary>Input Selection</summary>
<p>
This sample demonstrates handling 'select' events generated by
XRInputSources to create clickable objects in the scene.
<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 {Node} from './js/render/core/node.js';
import {Gltf2Node} from './js/render/nodes/gltf2.js';
import {SkyboxNode} from './js/render/nodes/skybox.js';
import {BoxBuilder} from './js/render/geometry/box-builder.js';
import {PbrMaterial} from './js/render/materials/pbr.js';
import {mat4} from './js/render/math/gl-matrix.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/cube-room/cube-room.gltf'}));
scene.standingStats(true);
let boxes = [];
function initXR() {
xrButton = new WebXRButton({
onRequestSession: onRequestSession,
onEndSession: onEndSession
});
document.querySelector('header').appendChild(xrButton.domElement);
if (navigator.xr) {
navigator.xr.supportsSession('immersive-vr').then(() => {
xrButton.enabled = true;
});
navigator.xr.requestSession('inline').then(onSessionStarted);
}
}
function initGL() {
if (gl)
return;
gl = createWebGLContext({
xrCompatible: true
});
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);
scene.inputRenderer.setControllerMesh(new Gltf2Node({url: 'media/gltf/controller/controller.gltf'}));
// Create several boxes to use for hit testing.
let boxBuilder = new BoxBuilder();
boxBuilder.pushCube([0, 0, 0], 0.4);
let boxPrimitive = boxBuilder.finishPrimitive(renderer);
function addBox(x, y, z, r, g, b) {
let boxMaterial = new PbrMaterial();
boxMaterial.baseColorFactor.value = [r, g, b, 1.0];
let boxRenderPrimitive = renderer.createRenderPrimitive(boxPrimitive, boxMaterial);
let boxNode = new Node();
boxNode.addRenderPrimitive(boxRenderPrimitive);
// Marks the node as one that needs to be checked when hit testing.
boxNode.selectable = true;
boxes.push({
node: boxNode,
renderPrimitive: boxRenderPrimitive,
position: [x, y, z]
});
scene.addNode(boxNode);
}
addBox(-1.0, 1.6, -1.3, 1.0, 0.0, 0.0);
addBox(0.0, 1.7, -1.5, 0.0, 1.0, 0.0);
addBox(1.0, 1.6, -1.3, 0.0, 0.0, 1.0);
}
function onRequestSession() {
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);
// By listening for the 'select' event we can find out when the user has
// performed some sort of primary input action and respond to it.
session.addEventListener('select', onSelect);
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 onSelect(ev) {
let refSpace = ev.frame.session.isImmersive ?
xrImmersiveRefSpace :
inlineViewerHelper.referenceSpace;
let targetRayPose = ev.frame.getPose(ev.inputSource.targetRaySpace, refSpace);
if (!targetRayPose) {
return;
}
let hitResult = scene.hitTest(targetRayPose.transform);
if (hitResult) {
// Check to see if the hit result was one of our boxes.
for (let box of boxes) {
if (hitResult.node == box.node) {
// Change the box color to something random.
let uniforms = box.renderPrimitive.uniforms;
uniforms.baseColorFactor.value = [Math.random(), Math.random(), Math.random(), 1.0];
}
}
}
}
function onEndSession(session) {
session.end();
}
function onSessionEnded(event) {
if (event.session.isImmersive) {
xrButton.setSession(null);
}
}
function onXRFrame(time, frame) {
let session = frame.session;
let refSpace = session.isImmersive ?
xrImmersiveRefSpace :
inlineViewerHelper.referenceSpace;
let pose = frame.getViewerPose(refSpace);
scene.startFrame();
session.requestAnimationFrame(onXRFrame);
// Update the matrix for each box
for (let box of boxes) {
let node = box.node;
mat4.identity(node.matrix);
mat4.translate(node.matrix, node.matrix, box.position);
mat4.rotateX(node.matrix, node.matrix, time/1000);
mat4.rotateY(node.matrix, node.matrix, time/1500);
}
// In this sample and most samples after it we'll use a helper function
// to automatically add the right meshes for the session's input sources
// each frame. This also does simple hit detection to position the
// cursors correctly on the surface of selectable nodes.
scene.updateInputSources(frame, refSpace);
scene.drawXRFrame(frame, pose);
scene.endFrame();
}
// Start the XR application.
initXR();
</script>
</body>
</html>
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