import { deg2rad , rad2deg } from "../systems/math" ; remarks example export class Vector { /**
     * Returns the x-component of the vector.
     */ get x ( ) : number { return this . values [ 0 ] ; } /**
     * Modifies the x-component of the vector.
     */ set x ( value ) { this . values [ 0 ] = value ; } /**
     * Returns the y-component of the vector.
     */ get y ( ) : number { return this . values [ 1 ] ; } /**
     * Modifies the y-component of the vector.
     */ set y ( value ) { this . values [ 1 ] = value ; } /**
     * Returns the z-component of the vector.
     */ get z ( ) : number { return this . values [ 2 ] ; } /**
     * Modifies the z-component of the vector.
     */ set z ( value ) { this . values [ 2 ] = value ; } /**
     * Returns the xyz-components of the vector, bundled as a copied array.
     */ get xyz ( ) : [ number , number , number ] { return [ this . x , this . y , this . z ] ; } /**
     * Simultaneously updates the xyz-components of the vector, by passing an array.
     */ set xyz ( values ) { this . values [ 0 ] = values [ 0 ] ; this . values [ 1 ] = values [ 1 ] ; this . values [ 2 ] = values [ 2 ] ; } private values = new Float32Array ( 3 ) ; /**
     * Creates a new vector with optional x-, y-, and z-components.
     * Omitted components are defaulted to 0.
     */ constructor ( x = 0 , y = 0 , z = 0 ) { this . xyz = [ x , y , z ] ; } /**
     * Returns (0, 0, 0).
     */ public static readonly zero : Vector = new Vector ( 0 , 0 , 0 ) ; /**
     * Returns (1, 1, 1).
     */ public static readonly one : Vector = new Vector ( 1 , 1 , 1 ) ; /**
     * Returns (1, 0, 0).
     */ public static readonly right : Vector = new Vector ( 1 , 0 , 0 ) ; /**
     * Returns (0, 1, 0).
     */ public static readonly up : Vector = new Vector ( 0 , 1 , 0 ) ; /**
     * Returns (0, 0, 1).
     */ public static readonly forward : Vector = new Vector ( 0 , 0 , 1 ) ; /**
     * Returns the length of the vector.
     */ public magnitude ( ) { return Math . sqrt ( this . sqrMagnitude ( ) ) ; } /**
     * Returns the squared length of the vector.
     */ public sqrMagnitude ( ) { return this . x * this . x + this . y * this . y + this . z * this . z ; } /**
     * Adds the two vectors together, component-wise.
     */ public add ( vector ) { return new Vector ( this . x + vector . x , this . y + vector . y , this . z + vector . z ) ; } /**
     * Subtracts the right vector from the left one, component-wise.
     */ public subtract ( vector ) { return new Vector ( this . x - vector . x , this . y - vector . y , this . z - vector . z ) ; } /**
     * Scales the lefthand vector by another vector or by a number.
     */ public scale ( scalar ) { if ( typeof scalar === "number" ) { return new Vector ( this . x * scalar , this . y * scalar , this . z * scalar ) ; } else { return new Vector ( this . x * scalar . x , this . y * scalar . y , this . z * scalar . z ) ; } } /**
     * Normalizes the vector to a length of 1. If the length was previously zero,
     * then a zero-length vector will be returned.
     */ public normalized ( ) { const magnitude = this . magnitude ( ) ; if ( magnitude !== 0 ) { return this . scale ( 1 / magnitude ) ; } return new Vector ( ... this . xyz ) ; } /**
     * Returns the angle between two vectors, in degrees.
     */ public angle ( vector ) { return ( rad2deg * Math . acos ( ( this . x * vector . x + this . y * vector . y + this . z * vector . z ) / ( this . magnitude ( ) * vector . magnitude ( ) ) ) ) ; } /**
     * Returns the cross-product of two vectors.
     */ public cross ( vector ) { return new Vector ( this . y * vector . z - this . z * vector . y , this . z * vector . x - this . x * vector . z , this . x * vector . y - this . y * vector . x ) ; } /**
     * returns the dot-product of two vectors.
     */ public dot ( vector ) { return ( this . magnitude ( ) * vector . magnitude ( ) * Math . cos ( deg2rad * this . angle ( vector ) ) ) ; } /**
     * Returns a formatted representation of the vector.
     */ public toString ( ) { return "Vector(" + this . values . join ( ", " ) + ")" ; } /**
     * Creates a new vector from an angle, in degrees. Note that the z-component will be zero.
     */ public static from2dAngle ( angle ) { return new Vector ( Math . cos ( angle * deg2rad ) , Math . sin ( angle * deg2rad ) ) ; } }