如何在Three.js中将缓冲区几何图形转换为几何图形

var geometry = new THREE.BufferGeometry();

var positions = new Float32Array([
    // 顶点坐标数据
]);
geometry.setAttribute('position', new THREE.BufferAttribute(positions, 3));

var colors = new Float32Array([
    // 颜色数据
]);
geometry.setAttribute('color', new THREE.BufferAttribute(colors, 3));

var normals = new Float32Array([
    // 法线数据
]);
geometry.setAttribute('normal', new THREE.BufferAttribute(normals, 3));

var uvs = new Float32Array([
    // 纹理坐标数据
]);
geometry.setAttribute('uv', new THREE.BufferAttribute(uvs, 2));

var mesh = new THREE.Mesh(geometry, material);