| 1 | (function(global, factory) {
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| 2 | typeof exports === "object" && typeof module !== "undefined" ? module.exports = factory() :
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| 3 | typeof define === "function" && define.amd ? define(factory) :
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| 4 | (global.extendedMath = factory());
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| 5 | } (this, function() {
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| 6 |
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| 7 | "use strict";
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| 8 |
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| 9 | if(typeof require !== "undefined") {
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| 10 | if(typeof utilities === "undefined") {
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| 11 | global.utilities = require("extra-utilities");
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| 12 | }
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| 13 | }
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| 14 |
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| 15 | var extendedMath = { };
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| 16 |
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| 17 | extendedMath.HalfPI = 1.57079632679489661923;
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| 18 | extendedMath.QuarterPI = 0.78539816339744830962;
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| 19 | extendedMath.TwoPI = 6.28318530717958647693;
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| 20 |
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| 21 | extendedMath.clamp = function(value, min, max) {
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| 22 | return utilities.isInvalidNumber(value) || utilities.isInvalidNumber(min) || utilities.isInvalidNumber(max) ? NaN : value < min ? min : value > max ? max : value;
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| 23 | };
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| 24 |
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| 25 | extendedMath.distance = function(a, b) {
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| 26 | return utilities.isInvalidNumber(a) || utilities.isInvalidNumber(b) ? NaN : Math.abs(b - a);
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| 27 | };
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| 28 |
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| 29 | extendedMath.radiansToDegrees = function(value) {
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| 30 | return utilities.isInvalidNumber(value) ? NaN : value * (180 / Math.PI);
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| 31 | };
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| 32 |
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| 33 | extendedMath.degreesToRadians = function(value) {
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| 34 | return utilities.isInvalidNumber(value) ? NaN : value * (Math.PI / 180);
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| 35 | };
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| 36 |
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| 37 | extendedMath.compareAnglesDegrees = function(a, b) {
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| 38 | if(utilities.isInvalidNumber(a) || utilities.isInvalidNumber(b)) {
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| 39 | return NaN;
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| 40 | }
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| 41 |
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| 42 | if(a == b) {
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| 43 | return 0;
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| 44 | }
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| 45 |
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| 46 | var c = a % 360;
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| 47 | var d = b % 360;
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| 48 |
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| 49 | if(c < 0) {
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| 50 | c += 360;
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| 51 | }
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| 52 |
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| 53 | if(d < 0) {
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| 54 | d += 360;
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| 55 | }
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| 56 |
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| 57 | if(c === d) {
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| 58 | return 0;
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| 59 | }
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| 60 |
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| 61 | return Math.cos(extendedMath.degreesToRadians(a - b) + (Math.PI / 2)) < 0 ? -1 : 1;
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| 62 | };
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| 63 |
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| 64 | extendedMath.compareAnglesRadians = function(a, b) {
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| 65 | return utilities.isInvalidNumber(a) || utilities.isInvalidNumber(b) ? NaN : extendedMath.compareAnglesDegrees(extendedMath.radiansToDegrees(a), extendedMath.radiansToDegrees(b));
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| 66 | };
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| 67 |
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| 68 | extendedMath.lerp = function(a, b, amount) {
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| 69 | if(utilities.isInvalidNumber(a) || utilities.isInvalidNumber(b) || utilities.isInvalidNumber(amount)) {
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| 70 | return NaN;
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| 71 | }
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| 72 |
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| 73 | if(amount === 0) {
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| 74 | return a;
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| 75 | }
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| 76 | else if(amount === 1) {
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| 77 | return b;
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| 78 | }
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| 79 |
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| 80 | return a + (b - a) * amount;
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| 81 | };
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| 82 |
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| 83 | extendedMath.normalize = function(value, min, max) {
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| 84 | return utilities.isInvalidNumber(value) || utilities.isInvalidNumber(min) || utilities.isInvalidNumber(max) ? NaN : (value - min) / (max - min);
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| 85 | };
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| 86 |
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| 87 | return extendedMath;
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| 88 |
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| 89 | }));
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