1、形状

2、对象

//创建一个长方体几何对象Geometry
//const geometry = new THREE.BoxGeometry(30,30,30);
//圆柱
//const geometry = new THREE.CylinderGeometry(5, 5, 20, 32);
//圆锥
//const geometry = new THREE.ConeGeometry(5, 20, 32);
//球体
//const geometry = new THREE.SphereGeometry(15, 32, 16);
//矩形平面
//const geometry = new THREE.PlaneGeometry(10, 10);
//原平面
const geometry = new THREE.CircleGeometry(5, 32);