three.js 给模型加标注（文字注释）

效果如下，需要可以联系qq:1582360909

核心代码：

  let canvas = document.getElementById('canvas')
  let ctx = canvas.getContext('2d')
  canvas.width = 300
  canvas.height = 300
  //制作矩形
  ctx.fillStyle = "rgba(255,165,0,0.8)";
  ctx.fillRect(0, 0, 300, 300)

 //设置文字
  ctx.fillStyle = "#fff";
  ctx.font = 'normal 18pt "楷体"'
  ctx.fillText('标注信息', 100, 20)
  let textWord = '测试信息'
  //文字换行
  let len = parseInt(textWord.length / 10)
  for (let i = 0; i < (len + 1); i++) {
    let space = 10
    if (i === len) {
      space = textWord.length - len * 10
    }
    console.log('len+' + len, 'space+' + space)
    let word = textWord.substr(i * 10, space)
    ctx.fillText(word, 15, 60*(i+1))
  }