victory-vendor/lib-vendor/d3-ease/src/sin.js

Vendored dependencies for Victory

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.sinIn = sinIn;
exports.sinInOut = sinInOut;
exports.sinOut = sinOut;
var pi = Math.PI,
    halfPi = pi / 2;

function sinIn(t) {
  return +t === 1 ? 1 : 1 - Math.cos(t * halfPi);
}

function sinOut(t) {
  return Math.sin(t * halfPi);
}

function sinInOut(t) {
  return (1 - Math.cos(pi * t)) / 2;
}