Function expInOut

external/.d3.js:5086–5088

(t)

}

function expInOut(t) {
  return ((t *= 2) <= 1 ? tpmt(1 - t) : 2 - tpmt(t - 1)) / 2;
}

function circleIn(t) {
  return 1 - Math.sqrt(1 - t * t);