VecJS

Immutable functional vector library. Currently it only has Vec2 the 2D vector type.

Related to the others, I think Vec2 is the best 2D vector library out for javascript.

Installation

npm i vecjs

Usage

Usage is simple and readable:

import { Vec2 } from 'vecjs'

let a = new Vec2(1,2)
let b = new Vec2({x: 3, y:4})
let c = {x: 4, y:5}

let res = (a) .add (b) .sub (c)  // x:0, y: 1

console.log(res)

Functions:

name	example	description
add	(a) .add (b)	(a.x+b.x, a.y+b.y)
sub	(a) .sub (b)	(a.x-b.x, a.y-b.y)
mul	(a) .mul (b)	(a.xb.x, a.yb.y)
div	(a) .div (b)	{ res: (a.x/b.x, a.y/b.y), err: boolean }
avg	(a) .avg (b)	( (a.x+b.x)/2 , (a.y+b.y)/2 )
dot	(a) .dot (b)	a.xb.x + a.yb.y
max	(a) .max (b)	(max(a.x, b.x), max(a.y, b.y))
min	(a) .min (b)	(min(a.x, b.x), min(a.y, b.y))
map	(a) .map (x => x*2)	(f(a.x), f(b.x))
proj	(a) .furrier (b)	{ res: the furrier coefficient of a and b (number), err: boolean }
proj	(a) .proj (b)	{ res: projection of a to the vector b (Vec2), err: boolean }
random	Vec2.random()	(random between 0 and 1, random between 0 and 1) with borders
null	Vec2.null()	(0,0) null element
id	Vec2.id()	(1,1) identity element

Computed properties:

name	example	description
lenSquare	(a) .lenSquare	a.x^2 + b.y^2
len	(a) .len	sqrt(a.x^2 + b.y^2)
norm	(a) .norm	{ res: (a.x/a.len , a.y/a.len), err: boolean }
normal1	(a) .normal1	(- a.y, a.x)
normal2	(a) .normal2	( a.y, - a.x)
inverse	(a) .inverse	(- a.x, - a.y)
sign	(a) .sign	(sgn(a.x), sgn(a.y))
sum	(a) .sum	a.x + a.y
diff	(a) .diff	a.x - a.y

Properties:

name	example	description
x	(a).x	The x coordinate
y	(a).y	The y coordinate