85 lines
1.8 KiB
JavaScript
85 lines
1.8 KiB
JavaScript
'use strict';
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/**
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*
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*/
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function zero() {
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return [0, 0, 0];
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}
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function one() {
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return [1, 1, 1];
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}
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function add(a, b) {
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return [a[0] + b[0], a[1] + b[1], a[2] + b[2]];
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}
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function addValue(a, n) {
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return [a[0] + n, a[1] + n, a[2] + n];
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}
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function sub(a, b) {
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return [a[0] - b[0], a[1] - b[1], a[2] - b[2]];
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}
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function subValue(a, n) {
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return [a[0] - n, a[1] - n, a[2] - n];
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}
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function scale(a, n) {
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return [a[0] * n, a[1] * n, a[2] * n];
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}
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function dot(a, b) {
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return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
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}
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function cross(a, b) {
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var x = a[1] * b[2] - a[2] * b[1];
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var y = a[2] * b[0] - a[0] * b[2];
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var z = a[0] * b[1] - a[1] * b[0];
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return [x, y, z];
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}
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/**
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* Calculate the squared length of a vector.
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* Use this when comparing two vectors instead of length, as it's more efficient (no sqrt)
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*/
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function lengthSqr(a) {
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return a[0] * a[0] + a[1] * a[1] + a[2] * a[2];
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}
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/**
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* Calculate the length of a vector.
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* If you only need to compare lenghts, consider using the more efficient lengthSqr
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*/
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function length(a) {
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return Math.sqrt(a[0] * a[0] + a[1] * a[1] + a[2] * a[2]);
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}
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function distance(a, b) {
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return Math.sqrt((a[0] - b[0]) * (a[0] - b[0]) + (a[1] - b[1]) * (a[1] - b[1]) + (a[2] - b[2]) * (a[2] - b[2]));
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}
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var vector3 = /*#__PURE__*/Object.freeze({
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__proto__: null,
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zero: zero,
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one: one,
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add: add,
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addValue: addValue,
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sub: sub,
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subValue: subValue,
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scale: scale,
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dot: dot,
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cross: cross,
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lengthSqr: lengthSqr,
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length: length,
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distance: distance
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});
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exports.add = add;
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exports.addValue = addValue;
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exports.cross = cross;
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exports.distance = distance;
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exports.dot = dot;
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exports.length = length;
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exports.lengthSqr = lengthSqr;
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exports.one = one;
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exports.scale = scale;
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exports.sub = sub;
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exports.subValue = subValue;
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exports.vector3 = vector3;
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exports.zero = zero;
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