Vector 2d for Love2d and Lua. Inspired on Vector2() of Godot Engine.

Download vector.lua and write on main.lua

vector = require "vector"

Example:

a = vector(5, 4)
print(a:string()) --> vector(5, 4)
b = vector(3, 2)
if a.x > b.x then print(a .. b) end --> vector(5, 4)vector(3, 2)
c = a + b
print(c:string()) --> vector(8, 6)
b = -b --> vector(-3, -2)

vector:string()

Returns the vector as string, also, tostring(vector) works.

vector:angle()

Returns the angle of vector in radians.

vector:normalized()

Set the vector normalized. Normalizing a vector means reducing its length to 1 while preserving its direction.

vector:distanceTo(vector)

Returns the distance between 2 vectors.

vector:distanceSquaredTo(vector)

Returns the distance squared between 2 vectors.

vector:distance()

Returns the distance of the vector.

vector:distanceSquared()

Returns the distance squared of the vector.

vector:dot(vector)

Returns the dot product of 2 vectors.

vector:perpDot(vector)

Returns the Perp Dot Product of 2 vectors.

vector:toPolar(angle, lenght)

Set the vector to the polar coordinate.

vector:abs()

Set the absolute value of the vector.

vector:round(decimals)

Set the vector with decimals, 0 or ignore for integer number. Example: vector(2.5, 3.4):round() --> vector(3, 3)

vector:rotated(phi)

Set the vector rotated by phiradians.

vector:cross(vector)

Returns the 2 dimensional analog of the cross product with the given vector.

vector:perpendicular()

Set the vector rotated 90°.

vector:lerpTo(vector, time)

Set the result of the linear interpolation between this vector and vector by amount time. time is in the range of 0.0 - 1.0, representing the amount of interpolation.

vector:unpack()

Returns x, y value of the vector.

this = vector(a, b) + vector(c, d) --> vector(a+c, b+d)

this = vector(a, b) - vector(c, d) --> vector(a-c, b-d)

this = vector(a, b) * vector(c, d) --> vector(a*c, b*d)

this = vector(a, b) / vector(c, d) --> vector(a/c, b/d)

this = vector(a, b) ^ c --> vector(a^c, b^c)

this = vector(a, b) .. vector(c, d) --> "vector(a, b)vector(c, d)"