vector-2d - Demo
Pure functions to manipulate 2d vectors
npm i @arekrado/vector-2d
type Vector2D = [number, number]- vector
type Vector = (x: number, y: number) => Vector2Dvector(5, 10) // [5, 10]- vectorZero
type VectorZero = () => Vector2DvectorZero() // [0, 0]- vectorUp
type VectorZero = () => Vector2DvectorUp() // [0, 1]- vectorRight
type VectorZero = () => Vector2DvectorRight() // [1, 0]- vectorDown
type VectorZero = () => Vector2DvectorDown() // [0, -1]- vectorLeft
type VectorZero = () => Vector2DvectorLeft() // [-1, 0]- vectorOne
type VectorZero = () => Vector2DvectorOne() // [1, 1]- add
type Add = (v1: Vector2D, v2: Vector2D) => Vector2Dadd(vector(2, 2), vector(2, 2)) // [4, 4]
add(vector(-5, 10), vector(3, -3)) // [2, 7]- sub
type Sub = (v1: Vector2D, v2: Vector2D) => Vector2Dsub(vector(2, 2), vector(2, 2)) // [0, 0]
sub(vector(-5, 10), vector(3, -3)) // [8, 13]- divide
type Sub = (v1: Vector2D, v2: Vector2D) => Vector2Ddivide(vector(2, 2), vector(2, 2)) // [1, 1]
divide(vector(10, 12), vector(2, 2)) // [5, 6]- multiply
type Sub = (v1: Vector2D, v2: Vector2D) => Vector2Dmultiply(vector(2, 2), vector(2, 2)) // [4, 4]
multiply(vector(5, 10), vector(3, -3)) // [15, -30]- scale - multiple vector by scalar (number)
type Scale = (scalar: number, v: Vector2D) => Vector2Dscale(0, vector(1, 1)) // [0, 0]
scale(1, vector(1, 1)) // [1, 1]
scale(10, vector(0.3, 0.4)) // [3, 4]- magnitude - returns vector length
type Magnitude = (v: Vector2D) => numbermagnitude(vectorZero()) // 0
magnitude(vector(3, 4)) // 5
magnitude(vector(-3, -4)) // 5
magnitude(vector(1, 1)) // 1.4142135623730951
magnitude(vector(2, 2)) // 2.8284271247461903- distance - returns distance between two vectors
type Distance = (v1: Vector2D, v2: Vector2D) => numberdistance(vectorZero(), vectorZero()) // 0
distance(vector(3, 4), vector(3, 4)) // 0
distance(vector(1, 1), vector(2, 1)) // 1
distance(vector(-1, -1), vector(-2, -1)) // 1- clamp - set vector length
type Clamp = (v: Vector2D, vMagnitude: number) => Vector2Dclamp(vector(3, 4), 5) // [3, 4]
clamp(vector(3, 4), 3) // [1.7999999999999998, 2.4]- isEqual - compares two vectors
type IsEqual = (v1: Vector2D, v2: Vector2D) => booleanisEqual(vector(1, 1), vector(1, 1)) // true
isEqual(vector(1, 1), vector(2, 1)) // false- dot - https://en.wikipedia.org/wiki/Dot_product - "how parallel the vectors are to each other"
type Dot = (v1: Vector2D, v2: Vector2D) => numberdot(vectorZero(), vectorZero()) // 0
dot(vector(1, 1), vector(1, 1)) // 2
dot(vectorUp(), vectorDown()) // -1
dot(vectorUp(), vectorLeft()) // 0
dot(vectorDown(), vectorRight()) // 0- angle - calculates angle between two vectors and returns result in radians
type Angle = (v1: Vector2D, v2: Vector2D) => numberangle(vectorZero(), vectorZero()) // 1.5707963267948966
angle(vector(1, 1), vector(1, 1)) // 2.1073424255447017e-8
angle(vectorUp(), vectorDown()) // 3.141592653589793
angle(vectorUp(), vectorLeft()) // 1.5707963267948966
angle(vectorDown(), vectorRight()) // 1.5707963267948966- angleDeg - calculates angle between two vectors and returns result in degrees (360)
type AngleDeg = (v1: Vector2D, v2: Vector2D) => numberangleDeg(vectorZero(), vectorZero()) // 90
angleDeg(vector(1, 1), vector(1, 1)) // 0.0000012074182697257333
angleDeg(vectorUp(), vectorDown()) // 180
angleDeg(vectorUp(), vectorLeft()) // 90
angleDeg(vectorDown(), vectorRight()) // 90- limit - clamp vector length between two values if exceeds them
type Limit = (v: Vector2D, min: number, max: number) => Vector2Dlimit(vectorZero(), 0, 0) // [3, 4]
limit(vector(3, 4), 0, 2) /// [0, 0]
limit(vector(3, 4), 0, 5) // [1.2, 1.6]
limit(vector(-3, -4), 0, 2) // [-1.2, -1.6]- normalize - returns the same vector but with length equals 1
type Normalize = (v: Vector2D) => Vector2Dnormalize(vectorZero()) // [0, 0]
normalize(vector(1, 1))) // [0.7071067811865475, 0.7071067811865475]
normalize(vector(1, 0)) // [1, 0]
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