JAVASCRIPT piecewise.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = piecewise;
var _value = _interopRequireDefault(require("./value.js"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function piecewise(interpolate, values) {
  if (values === undefined) values = interpolate, interpolate = _value.default;
  var i = 0,
    n = values.length - 1,
    v = values[0],
    I = new Array(n < 0 ? 0 : n);
  while (i < n) I[i] = interpolate(v, v = values[++i]);
  return function (t) {
    var i = Math.max(0, Math.min(n - 1, Math.floor(t *= n)));
    return I[i](t - i);
  };
}