Lines

local function Segment(x1,y1,x2,y2)
    --Private
    local x1 = x1
    local x2 = x2
    local y1 = y1
    local y2 = y2

    local maxX = x1 > x2 and x1 or x2
    local minX = x1 < x2 and x1 or x2

    local maxY = y1 > y2 and y1 or y2
    local minY = y1 < y2 and y1 or y2

    --Public
    local self = {}
    function self.render(resolution)
        local path = {}
        for i=0,1,1/resolution do
            path[#path + 1] = {x1*(1-i)+x2*i, y1*(1-i)+y2*i}
        end
        return path
    end
    --get x
    function self.getX(y)
        index = (y - y1)/(y2 - y1)
        if index <= 1 and index >= 0 then
            local toret = x1 + index*(x2 - x1)
            return toret
        end
    end
    --get y
    function self.getY(x)
        index = (x - x1)/(x2 - x1)
        if index <= 1 and index >= 0 then
            return y1 + index*(y2 - y1)
        end
    end
    --scanLine
    function self.scanRender()
        local path = {}
        local counter = 1
        for i=minY, maxY do
            path[counter] = self.getX(i)
            path[counter + 1] = i
            counter = counter + 2
        end
        return path
    end
    --Constructor
    return self
end