threejs 模型添加文字的多种方式汇总

// ---------------------------------------------------------------------
// 添加模型
// ---------------------------------------------------------------------
var geometry = new THREE.BoxGeometry( 30,30, 30 );
var materials = [ 
    new THREE.MeshBasicMaterial( { color: 'blue' } ), // right
    new THREE.MeshBasicMaterial( { color: 'yellow' } ), // left
    new THREE.MeshBasicMaterial( { map: new THREE.CanvasTexture(getTextCanvas1()) } ), // top
    new THREE.MeshBasicMaterial( { color: 'black' } ), // bottom
    new THREE.MeshBasicMaterial( { color: 'green' } ), // back
    new THREE.MeshBasicMaterial( { color: 'red' } ) // front 
    ];
var cube = new THREE.Mesh( geometry, materials );
scene.add(cube);

// CanvasTexture
function getTextCanvas1(){ 
    let texts=[{
        name:"北京",
        value:323
    },{
        name:"杭州",
        value:121
    },{
        name:"南京",
        value:56
    }]
    var width=512, height=256; 
    var canvas = document.createElement('canvas');
    canvas.width = width;
    canvas.height = height;
    var ctx = canvas.getContext('2d');
    ctx.fillStyle = '#C3C3C3';
    ctx.fillRect(0, 0, width, height);
    ctx.font = 32+'px " bold';
    ctx.fillStyle = '#2891FF';
    texts.forEach((text,index)=>{
        ctx.fillText(`${text.name}:${text.value}`, 10, 32 * index + 30);
    }) 
    return canvas;
}

function getTextCanvas2(){
 //用canvas生成图片
  let canvas = document.createElement("canvas");
  let ctx = canvas.getContext('2d')
  canvas.width = 300
  canvas.height = 300
  //制作矩形
  ctx.fillStyle = "gray"; 
  ctx.fillRect(0, 0, 300, 300)
  //设置文字
  ctx.fillStyle = "white";
  ctx.font = 'normal 20px "楷体"'
  ctx.fillText('这个平面将被贴在正方体前表面', 0, 20)
 
  //生成图片
  let url = canvas.toDataURL('image/png');
  //将图片构建到纹理中
  let geometry1 = new THREE.PlaneGeometry(30, 30)
  let material1 = new THREE.MeshBasicMaterial({
    map: new THREE.TextureLoader().load(url),
    side: THREE.DoubleSide,
    opacity: 1
  })
  let rect = new THREE.Mesh(geometry1, material1)
  rect.position.set(0, 0, 25.1)
  scene.add(rect)
}
getTextCanvas2();

  //制作矩形
  ctx.fillStyle = "transparent";  // 设为透明
 
 
  //将图片构建到纹理中
  let geometry1 = new THREE.PlaneGeometry(30, 30)
  let material1 = new THREE.MeshBasicMaterial({
    map: new THREE.TextureLoader().load(url),
    side: THREE.DoubleSide,
    opacity: 1,
    transparent: true, // 设为透明
  })

// ---------------------------------------------------------------------
// 添加文字模型
// ---------------------------------------------------------------------
let texts1=[
{
    name:"北 京",
    value:23
}
,{
    name:"杭 州",
    value:23
},
{
    name:"南 京",
    value:23
},
{
    name:"南 京",
    value:23
} 
,{
    name:"杭 州",
    value:23
},
{
    name:"南 京",
    value:23
},
{
    name:"南 京",
    value:23
}
 
]
texts1.forEach((text,index)=>{
    addTextGeometry(text,index);
})
 
 
// 添加文字geometry
function addTextGeometry(text,index){
    var loader = new THREE.FontLoader(); 
    loader.load("/statics/fonts/chinese.json", function (res) { 
        var geometry = new THREE.TextGeometry(`${text.name}: ${text.value}`, {
            font: res,          // 字体格式
            size: 13,           // 字体大小
            height: 1,          // 字体深度
            curveSegments: 11,  // 曲线控制点数
            bevelEnabled: true, // 斜角
            bevelThickness: 0.1,  // 斜角的深度
            bevelSize: 1,       // 斜角的大小
            bevelSegments: 1    // 斜角段数
        });
        var mat = new THREE.MeshPhongMaterial({
            color: "white",
            opacity: 0.8,
            shininess: 1,
        });
        var mesh = new THREE.Mesh(geometry, mat);
        mesh.rotation.y=-Math.PI/2
        mesh.position.set(-151,150-40*index, 15.1);
        scene.add(mesh);
    }); 
}