CSS3DSprite精灵模型面向摄像机，场景缩放时，缩小放大跟随着，会被模型遮挡，可以被射线拾取。
CSS3DRenderer用于通过CSS3的transform属性， 将层级的3D变换应用到DOM元素上。 如果你希望不借助基于canvas的渲染来在你的网站上应用3D变换，那么这一渲染器十分有趣。 同时，它也可以将DOM元素与WebGL的内容相结合。在添加标注前需要先给模型命名

1.CSS2DRenderer/CSS3DRenderer/Sprite的优劣

2.实现模型上方显示信息框

2.1 引入

import { CSS3DRenderer, CSS3DSprite } from "three/examples/jsm/renderers/CSS3DRenderer.js";

2.2 初始化加载的时候就执行此方法

// 初始化 CSS3DRenderer 设备信息框
initObjectRender() {
	labelRender = new CSS3DRenderer();
	labelRender.setSize(this.$refs.draw.offsetWidth, this.$refs.draw.offsetHeight);
	labelRender.domElement.style.position = "absolute";
	labelRender.domElement.style.top = "0px";
	labelRender.domElement.style.pointerEvents = "none";
	document.getElementById("workshop").appendChild(labelRender.domElement);
},

2.3 animate循环执行

labelRender.render(scene, camera);

2.4 获取设备状态并在每个设备上显示设备状态

initEqpStatus() {
	let eqpStatus = {};
	const group = new THREE.Group();
	this.eqpList.forEach((item) => {
		const { enCode, status, stateDate } = item;
		eqpStatus[enCode] = { status, stateDate };
	});
	scene.traverse(async (obj) => {
	    //获取设备名称
		const regex = /[^\_\)]+(?=\()/g;
		const eqpEnCode = obj.name.match(regex);
		//说明为当前设备
		if (eqpEnCode && eqpStatus[eqpEnCode[0]]) {
			let { status, stateDate } = eqpStatus[eqpEnCode[0]];

            //以下为生成标签关键代码
			const shpereMesh = this.createCpointMesh(eqpEnCode[0], obj.position.x, obj.position.y + 500, obj.position.z);
			group.add(shpereMesh);

			const p = document.createElement("p");

			const pContainer = document.createElement("div");
			pContainer.className = `workshop-text ${this.deviceStateBg(status.toUpperCase())}`;
			pContainer.style.pointerEvents = "none"; //避免HTML标签遮挡三维场景的鼠标事件
			pContainer.appendChild(p);
			const cPointLabel = new CSS3DSprite(pContainer);
			cPointLabel.scale.set(1.2, 1.2, 1.2); //根据相机渲染范围控制HTML 3D标签尺寸
			cPointLabel.rotateY(Math.PI / 2); //控制HTML标签CSS3对象姿态角度
			cPointLabel.position.set(obj.position.x, obj.position.y + 500, obj.position.z);
			scene.add(cPointLabel);

			p.textContent = eqpEnCode[0];//标签显示内容
		}
	});
},
// 设备状态颜色
deviceStateBg(val) {
	const state = {
		RUNNING: "RUNNING",
		IDLE: "IDLE",
		OFFLINE: "OFFLINE",
		"Planned Downtime": "IDLE",
	};
	return state[val];
},
//创建基础模型
createCpointMesh(name, x, y, z) {
	const geo = new THREE.BoxGeometry(0.1);
	const mat = new THREE.MeshBasicMaterial({ color: 0xff0000 });
	const mesh = new THREE.Mesh(geo, mat);
	mesh.position.set(x, y, z);
	mesh.name = name;
	return mesh;
},

2.5 样式

.workshop-text {
	box-shadow: 0 0 5px #2d69a1;
	padding: 10px;
	background: #2d69a154;
}

.workshop-text p {
	font-size: 0.3rem;
	font-weight: bold;
	padding: 10px;
	color: #fff;
}
.workshop-text.IDLE {
	background: #ecd272 !important;
}

.workshop-text.RUNNING {
	background: #86efd4 !important;
}

.workshop-text.OFFLINE {
	background: #8ab1de !important;
}