在使用Threejs代码构建的展厅中，需要在一面墙中间挖个洞作为门或窗户，效果如下：

引入ThreeBSP.js

<script src="plugins/three/ThreeBSP.js"></script>

创建

    // 1 定义墙面var cubeGeometry = new THREE.BoxGeometry(184.8, 40, 2.4);var cube = new THREE.Mesh(cubeGeometry);// 2 定义窗户门var door = new THREE.BoxGeometry(60, 35, 2.4);var doorMesh = new THREE.Mesh(door);doorMesh.position.y = -8// 3 定义两个bsp对象var cubeBSP = new ThreeBSP(cube);var doorBSP = new ThreeBSP(doorMesh);// 4 取交集let resultBSP = cubeBSP.subtract(doorBSP); // 墙体挖窗户门// 5 将相交的部分转换成Meshlet result = resultBSP.toMesh();// 6 转成geometryvar cubeGeometry = result.geometryvar cubeMaterial = [new THREE.MeshBasicMaterial({ color: 0xe9e9e9 }),  //右new THREE.MeshBasicMaterial({ color: 0xe9e9e9 }),new THREE.MeshBasicMaterial({ color: 0xe9e9e9 }),  //上 new THREE.MeshBasicMaterial({ color: 0xe9e9e9 }),new THREE.MeshBasicMaterial({ color: 0xe9e9e9 }),new THREE.MeshBasicMaterial({ color: 0xe9e9e9 }),]// 7 重新生成一个mesh let wallMesh = new THREE.Mesh(cubeGeometry, cubeMaterial);wallMesh.position.set(0, 5, 71.8)scene.add(wallMesh);

即实现在墙体上挖个洞作为门或窗户

其中ThreeBSP.js下载地址：https://download.csdn.net/download/qq_33298964/89400806