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Webgpu: test XRGPUBinding interface to discover support #33565

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749b381
Update devDependencies (non-major) (#25754)
renovate[bot] Apr 3, 2023
fe59e3d
fix ssl error (#27163)
elalish Nov 9, 2023
08618a8
bump pathtracer mior -> 0.0.22 (#28280)
ycw May 4, 2024
0d8bdf6
feature check webgpu based on XRGPUBinding interface
cabanier May 12, 2026
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70 changes: 11 additions & 59 deletions examples/jsm/webxr/WebGLXRFallback.js
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Original file line number Diff line number Diff line change
@@ -1,71 +1,23 @@
/**
* Sets up a construction-time WebGL fallback for WebGPU XR examples.
*
* @param {WebGPURenderer} renderer - The initial renderer.
* @param {Function} createFallbackRenderer - A function that returns a new renderer with a WebGL backend.
* @param {Function} onFallback - A function that installs the new renderer in the app.
* WebGPU XR requires the browser to expose `XRGPUBinding`. If the API is not
* available, this helper mutates the renderer parameters to use the existing
* WebGL fallback backend.
*
* @param {Object} parameters - The parameters passed to `WebGPURenderer`.
* @return {Object} The same parameters object.
*/
function setupWebGLXRFallback( renderer, createFallbackRenderer, onFallback = () => {} ) {

let currentRenderer = renderer;
const patchedRenderers = new WeakSet();

function patchRenderer( renderer ) {

if ( patchedRenderers.has( renderer ) ) return;

patchedRenderers.add( renderer );

const setSession = renderer.xr.setSession.bind( renderer.xr );

renderer.xr.setSession = async function ( session ) {

if ( renderer !== currentRenderer ) {

return currentRenderer.xr.setSession( session );

}

try {

return await setSession( session );

} catch ( error ) {

if ( session === null || renderer.backend.isWebGPUBackend !== true ) {

throw error;

}

const fallbackRenderer = createFallbackRenderer( renderer );

if ( fallbackRenderer.backend.isWebGLBackend !== true ) {

throw new Error( 'WebGLXRFallback: createFallbackRenderer() must return a renderer with a WebGL backend.' );

}

fallbackRenderer.xr.enabled = renderer.xr.enabled;
fallbackRenderer.xr.cameraAutoUpdate = renderer.xr.cameraAutoUpdate;
fallbackRenderer.xr.setFramebufferScaleFactor( renderer.xr.getFramebufferScaleFactor() );
fallbackRenderer.xr.setReferenceSpaceType( renderer.xr.getReferenceSpaceType() );

await onFallback( fallbackRenderer, renderer );

currentRenderer = fallbackRenderer;
patchRenderer( fallbackRenderer );

return fallbackRenderer.xr.setSession( session );
function setWebGLXRFallback( parameters ) {

}
if ( ! ( 'XRGPUBinding' in window ) ) {

};
parameters.forceWebGL = true;

}

patchRenderer( renderer );
return parameters;

}

export { setupWebGLXRFallback };
export { setWebGLXRFallback };
49 changes: 9 additions & 40 deletions examples/webgpu_xr_cubes.html
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Original file line number Diff line number Diff line change
Expand Up @@ -34,12 +34,13 @@
import { BoxLineGeometry } from 'three/addons/geometries/BoxLineGeometry.js';
import { XRButton } from 'three/addons/webxr/XRButton.js';
import { XRControllerModelFactory } from 'three/addons/webxr/XRControllerModelFactory.js';
import { setupWebGLXRFallback } from 'three/addons/webxr/WebGLXRFallback.js';
import { setWebGLXRFallback } from 'three/addons/webxr/WebGLXRFallback.js';

const timer = new THREE.Timer();
timer.connect( document );

const rendererParameters = { antialias: true, outputBufferType: THREE.UnsignedByteType, multiview: true };
setWebGLXRFallback( rendererParameters );
const controllerModelFactory = new XRControllerModelFactory();

let container;
Expand Down Expand Up @@ -105,54 +106,22 @@

raycaster = new THREE.Raycaster();

renderer = createRenderer();
setRenderer( renderer );
setupWebGLXRFallback( renderer, () => createRenderer( true ), setRenderer );

//

window.addEventListener( 'resize', onWindowResize );

//

document.body.appendChild( XRButton.createButton( renderer ) );

}

function createRenderer( forceWebGL = false ) {

const parameters = { ...rendererParameters };

if ( forceWebGL === true ) parameters.forceWebGL = true;

const renderer = new THREE.WebGPURenderer( parameters );
renderer = new THREE.WebGPURenderer( rendererParameters );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setAnimationLoop( animate );
renderer.xr.enabled = true;
container.appendChild( renderer.domElement );

return renderer;

}

function setRenderer( newRenderer, oldRenderer = null ) {

if ( controller !== undefined ) scene.remove( controller );
if ( controllerGrip !== undefined ) scene.remove( controllerGrip );

if ( oldRenderer === null ) {

container.appendChild( newRenderer.domElement );
setupControllers();

} else {
//

container.replaceChild( newRenderer.domElement, oldRenderer.domElement );
oldRenderer.dispose();
window.addEventListener( 'resize', onWindowResize );

}
//

renderer = newRenderer;
setupControllers();
document.body.appendChild( XRButton.createButton( renderer ) );

}

Expand Down
6 changes: 5 additions & 1 deletion examples/webgpu_xr_native_layers.html
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Expand Up @@ -45,6 +45,7 @@
} from 'three/addons/misc/RollerCoaster.js';
import { HTMLMesh } from 'three/addons/interactive/HTMLMesh.js';
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
import { setWebGLXRFallback } from 'three/addons/webxr/WebGLXRFallback.js';

let camera, scene, renderer;
let controller1, controller2;
Expand Down Expand Up @@ -185,7 +186,10 @@

//

renderer = new THREE.WebGPURenderer( { antialias: true, forceWebGL: true, outputBufferType: THREE.UnsignedByteType, multiview: true } );
const rendererParameters = { antialias: true, outputBufferType: THREE.UnsignedByteType, multiview: true };
setWebGLXRFallback( rendererParameters );

renderer = new THREE.WebGPURenderer( rendererParameters );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
Expand Down
48 changes: 9 additions & 39 deletions examples/webgpu_xr_rollercoaster.html
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Original file line number Diff line number Diff line change
Expand Up @@ -33,55 +33,25 @@
SkyGeometry
} from 'three/addons/misc/RollerCoaster.js';
import { VRButton } from 'three/addons/webxr/VRButton.js';
import { setupWebGLXRFallback } from 'three/addons/webxr/WebGLXRFallback.js';
import { setWebGLXRFallback } from 'three/addons/webxr/WebGLXRFallback.js';

let mesh, material, geometry;
let renderer;

const rendererParameters = { antialias: true, outputBufferType: THREE.UnsignedByteType, multiview: false };
setWebGLXRFallback( rendererParameters );

renderer = createRenderer();
setRenderer( renderer );
setupWebGLXRFallback( renderer, () => createRenderer( true ), setRenderer );
const renderer = new THREE.WebGPURenderer( rendererParameters );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setAnimationLoop( animate );
renderer.xr.enabled = true;
renderer.xr.setReferenceSpaceType( 'local' );
document.body.appendChild( renderer.domElement );

document.body.appendChild( VRButton.createButton( renderer ) );

//

function createRenderer( forceWebGL = false ) {

const parameters = { ...rendererParameters };

if ( forceWebGL === true ) parameters.forceWebGL = true;

const renderer = new THREE.WebGPURenderer( parameters );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setAnimationLoop( animate );
renderer.xr.enabled = true;
renderer.xr.setReferenceSpaceType( 'local' );

return renderer;

}

function setRenderer( newRenderer, oldRenderer = null ) {

if ( oldRenderer === null ) {

document.body.appendChild( newRenderer.domElement );

} else {

document.body.replaceChild( newRenderer.domElement, oldRenderer.domElement );
oldRenderer.dispose();

}

renderer = newRenderer;

}

const scene = new THREE.Scene();
scene.background = new THREE.Color( 0xf0f0ff );

Expand Down
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