Splitting Code Into Several Files

In this part I'm finally going to split the main.lua into several smaller files.

Module in Lua are typically return tables. The simplest way is to move previously defined table into corresponding files.

local levels = {}
levels.current_level = 1
levels.gamefinished = false
levels.sequence = {}
.....
return levels

Basically, the code doesn't change. The only thing I want to introduce in this chapter is vectors module from HUMP [link]. It allows to simplify some arithmetics

local vector = require "vector"

local ball = {}
ball.position = vector( 200, 500 )
ball.speed = vector( 700, 700 )
ball.radius = 10

function ball.update( dt )
   ball.position = ball.position + ball.speed * dt
end

function ball.draw()
   local segments_in_circle = 16
   love.graphics.circle( 'line',
			 ball.position.x,
			 ball.position.y,
			 ball.radius,
			 segments_in_circle )   
end

In the main.lua it is necessary to require the other files:

local ball = require "ball"
local platform = require "platform"
local bricks = require "bricks"
local walls = require "walls"
local collisions = require "collisions"
local levels = require "levels"

.....

The rest of the code in the main.lua doesn't change.