三个JS大小的对象(PlaneGeometry)？

// 创建场景
var scene = new THREE.Scene();

// 创建相机
var camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.z = 5;

// 创建渲染器
var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

// 创建平面几何体
var geometry = new THREE.PlaneGeometry(2, 2);

// 创建材质
var material = new THREE.MeshBasicMaterial({color: 0x00ff00});

// 创建平面对象
var plane = new THREE.Mesh(geometry, material);

// 将平面对象添加到场景中
scene.add(plane);

// 渲染场景
renderer.render(scene, camera);