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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>WebXR AR Demo</title>
</head>
<body>
<button id="startButton">Start AR1</button>
<script>
let renderer, scene, camera, session;
async function initXR() {
if (!navigator.xr) {
alert("WebXR not supported in this browser");
return;
}
session = await navigator.xr.requestSession("immersive-ar", { requiredFeatures: ['local'] });
const canvas = document.createElement("canvas");
document.body.appendChild(canvas);
const gl = canvas.getContext("webgl", { xrCompatible: true });
renderer = new THREE.WebGLRenderer({ alpha: true, preserveDrawingBuffer: true, canvas, context: gl });
renderer.autoClear = true;
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera();
camera.matrixAutoUpdate = false;
const cubeGeometry = new THREE.BoxGeometry(0.2, 0.2, 0.2);
//const cubeMaterial = new THREE.MeshBasicMaterial({ color: 0xff0000 });
const cubeMaterial = [
new THREE.MeshBasicMaterial({color: 0xff0000}),
new THREE.MeshBasicMaterial({color: 0x0000ff}),
new THREE.MeshBasicMaterial({color: 0x00ff00}),
new THREE.MeshBasicMaterial({color: 0xff00ff}),
new THREE.MeshBasicMaterial({color: 0x00ffff}),
new THREE.MeshBasicMaterial({color: 0xffff00})
];
const cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
cube.position.set(0, 0, -0.5);
scene.add(cube);
session.updateRenderState({ baseLayer: new XRWebGLLayer(session, gl) });
const referenceSpace = await session.requestReferenceSpace("local");
function renderXRFrame(time, frame) {
session.requestAnimationFrame(renderXRFrame);
const pose = frame.getViewerPose(referenceSpace);
if (!pose) return;
const view = pose.views[0];
const viewport = session.renderState.baseLayer.getViewport(view);
renderer.setSize(viewport.width, viewport.height);
camera.matrix.fromArray(view.transform.matrix);
camera.projectionMatrix.fromArray(view.projectionMatrix);
camera.updateMatrixWorld(true);
gl.bindFramebuffer(gl.FRAMEBUFFER, session.renderState.baseLayer.framebuffer);
renderer.render(scene, camera);
}
session.requestAnimationFrame(renderXRFrame);
}
document.getElementById("startButton").addEventListener("click", initXR);
</script>
</body>
</html>