Three.js|Three.js 新旧版本创建几何对象差异 Three.js新旧版本创建几何对象差

昨天遇到个小问题，也搞了挺长时间：用Three.js在webgl中绘制三维对象，从网上抄的一段代码，运行报错：
THREE.Geometry is not a constructor
【Three.js|Three.js 新旧版本创建几何对象差异】纳尼，找不到Geometry对象？

function createLine(){ let start = new THREE.Vector3(7, 1.8, -2); let end = new THREE.Vector3(1.6,1.8, -2); // 就是这里创建的对象找不到 ***** let geometry = new THREE.Geometry(); // ****************************let lineMaterial = new THREE.LineBasicMaterial({color: 0x00ff00}); geometry.vertices.push(start); geometry.vertices.push(end); let line = new THREE.Line(lineGeometry, lineMaterial); scene.add(line); return line; }

一开始还以为是模块导入问题，折腾了一阵才发现，THREE模块中竟然真的就没有Geometry！难道网上的代码是愚人节贴的？遇事不决问google，终于确认人家是升级了。新版的Three.js不再提供Geometry对象，代之以BufferGeometry，代码修改如下：

function createLine(){ let start = new THREE.Vector3(7, 1.8, -2); let end = new THREE.Vector3(1.6,1.8, -2); let lineMaterial = new THREE.LineBasicMaterial({color: 0x00ff00}); let pointsArray = [start, end]; let lineGeometry = new THREE.BufferGeometry().setFromPoints(pointsArray); let line = new THREE.Line(lineGeometry, lineMaterial); scene.add(line); return line; }