@pmndrs/xr/dist/mesh.js

VR/AR for threejs

import { BufferAttribute, BufferGeometry } from 'three';
export function updateXRMeshGeometry(mesh, geometry) {
    if (geometry != null && geometry.createdAt != null && geometry.createdAt >= mesh.lastChangedTime) {
        return geometry;
    }
    const newGeometry = new BufferGeometry();
    newGeometry.setIndex(new BufferAttribute(mesh.indices, 1));
    newGeometry.setAttribute('position', new BufferAttribute(mesh.vertices, 3));
    return Object.assign(newGeometry, { creationTime: mesh.lastChangedTime });
}