第一步：找个.ttf字体利用下面的网站转换成json文件
https://gero3.github.io/facetype.js/
import * as THREE from 'three';

const scene = new THREE.Scene();
function add3DFont() {
        new THREE.FontLoader().load('font/FZYaoTi_Regular.json', function(font) {
                //加入立体文字
                var text = new THREE.TextGeometry("左本的博客，Three.js3D文字", {
                        // 设定文字字体
                        font: font,
                        //尺寸
                        size: 24,
                        //厚度
                        height: 5
                });
                text.computeBoundingBox();
			    // 设置偏移
			    text.translate(-0, 0, 0);
			    //3D文字材质
			    var m = new THREE.MeshStandardMaterial({
			      color: "#FFFFFF",
			    });
			    let fontMesh = new THREE.Mesh(text, m);
			    fontMesh.position.y = 1;
			    scene.add(fontMesh);
        });
}

将字体文件上传即可