AK-21/Graphite-Industrial-Intelligence

1import constant from "./constant.js";2 3function linear(a, d) {4  return function(t) {5    return a + t * d;6  };7}8 9function exponential(a, b, y) {10  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {11    return Math.pow(a + t * b, y);12  };13}14 15export function hue(a, b) {16  var d = b - a;17  return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant(isNaN(a) ? b : a);18}19 20export function gamma(y) {21  return (y = +y) === 1 ? nogamma : function(a, b) {22    return b - a ? exponential(a, b, y) : constant(isNaN(a) ? b : a);23  };24}25 26export default function nogamma(a, b) {27  var d = b - a;28  return d ? linear(a, d) : constant(isNaN(a) ? b : a);29}30