master/%E5%A4%A9%E6%96%87%E5%8F%B0pc/tianwentai-ui/node_modules/@mui/material/esm/styles/getOverlayAlpha.js

// Inspired by https://github.com/material-components/material-components-ios/blob/bca36107405594d5b7b16265a5b0ed698f85a5ee/components/Elevation/src/UIColor%2BMaterialElevation.m#L61
export default function getOverlayAlpha(elevation) {
  let alphaValue;
  if (elevation < 1) {
    alphaValue = 5.11916 * elevation ** 2;
  } else {
    alphaValue = 4.5 * Math.log(elevation + 1) + 2;
  }
  return Math.round(alphaValue * 10) / 1000;
}