58 lines
994 B
JavaScript
58 lines
994 B
JavaScript
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/**
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* Stores a 2D vector.
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*/
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export default class Vector {
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/**
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* @param {number} x
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* @param {number} y
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*/
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constructor(x, y) {
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/** type {number} */ this.x = x;
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/** type {number} */ this.y = y;
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}
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/**
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* @param {Vector} other
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* @return {boolean}
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*/
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equals(other) {
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return (other != null) && (this.x == other.x) && (this.y == other.y);
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}
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/**
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* @param {Vector} other
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* @return {Vector}
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*/
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subtract(other) {
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return new Vector(this.x - other.x, this.y - other.y);
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}
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/**
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* @param {Vector} other
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* @return {Vector}
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*/
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add(other) {
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return new Vector(this.x + other.x, this.y + other.y);
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}
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/**
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* @return {Vector}
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*/
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clone() {
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return new Vector(this.x, this.y);
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}
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/** @return {number} */
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length() {
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return Math.sqrt(this.x * this.x + this.y * this.y);
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}
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/**
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* @param {number} scale
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* @return {Vector}
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*/
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scale(scale) {
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return new Vector(this.x * scale, this.y * scale);
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}
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}
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