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File: /var/www/design.system/node_modules/antd/es/float-button/util.js
const getOffset = radius => {
  if (radius === 0) {
    return 0;
  }
  // 如果要考虑通用性,这里应该用三角函数 Math.sin(45)
  // 但是这个场景比较特殊,始终是等腰直角三角形,所以直接用 Math.sqrt() 开方即可
  return radius - Math.sqrt(Math.pow(radius, 2) / 2);
};
export default getOffset;