Orakel/src/System/Classes/Vector2

Vector2.lua

local Vector2 = {}
local std = require("System/StdLib")
local sqrt = math.sqrt

function Vector2.new(x, y)
    assert(tonumber(x) or (x == nil), std.err("Vector2 coordinates can only be numbers"))
    assert(tonumber(x) or (x == nil), std.err("Vector2 coordinates can only be numbers"))
    local vec2 = {}
    setmetatable(vec2, Vector2)
    vec2.x = x or 0
    vec2.y = y or 0
    vec2.Type = "Vector2"
    return vec2
end


function Vector2.__index(self, index)
    if index == "magnitude" then
        local x, y = rawget(self, "x"), rawget(self, "y")
        return sqrt(x * x + y * y)
    elseif index == "unit" then
        local x, y = rawget(self, "x"), rawget(self, "y")
        local len = sqrt(x * x + y * y)
        if len == 0 then
            return self
        end
        return Vector2.new(x / len, y / len)
    end
    return rawget(Vector2, index)
end


function Vector2:ScreenCoordinates()
    local wx = self.x
    local wy = self.y



end


function Vector2.__tostring(self)
    return self.x..", "..self.y
end


function Vector2.__eq(lhs, rhs)
    assert(rhs.Type == "Vector2", std.err("Cannot compare Vector2 with "..tostring(rhs)))
    if lhs.x == rhs.x and lhs.y == rhs.y then
        return true
    end
    return false
end


function Vector2.__add(lhs, rhs)
    if type(rhs) == "number" then
        return Vector2.new(lhs.x + rhs, lhs.y + rhs)
    end
    return Vector2.new(lhs.x + rhs.x, lhs.y + rhs.y)
end


function Vector2.__mul(lhs, rhs)
    if type(rhs) == "number" then
        return Vector2.new(lhs.x * rhs, lhs.y * rhs)
    end
    return Vector2.new(lhs.x * rhs.x, lhs.y * rhs.y)
end


function Vector2.__div(lhs, rhs)
    if type(rhs) == "number" then
        return Vector2.new(lhs.x / rhs, lhs.y / rhs)
    end
    return Vector2.new(lhs.x / rhs.x, lhs.y / rhs.y)
end


function Vector2.__sub(lhs, rhs)
    if type(rhs) == "number" then
        return Vector2.new(lhs.x - rhs, lhs.y - rhs)
    end
    return Vector2.new(lhs.x - rhs.x, lhs.y - rhs.y)
end



return Vector2