refactoring

lib/grid.lua

@@ -1,4 +1,4 @@
-local utils = require("utils")
+local utils = require "lib/utils"
 
 ---Generates an empty grid
 ---@param width number

lib/level.lua

@@ -1,5 +1,25 @@
+local utils = require "lib/utils"
+local camera = require "lib/camera"
+
+--- @class Level
+--- @field characters Character[]
+--- @field camera Camera
+local level = {}
+level.__index = level
+
 local function new()
-    return {
-        characters = {}
-    }
+    return setmetatable({
+        characters = {},
+        camera = camera.new()
+    }, level)
 end
+
+function level:update(dt)
+    utils.each(self.characters, function(el)
+        el:update(dt)
+    end)
+end
+
+return {
+    new = new
+}

lib/utils.lua

@@ -16,8 +16,21 @@ function P.generateList(count, generator)
     return xs
 end
 
+--- Returns the sign of a number
+--- @param number number
+--- @return -1 | 0 | 1
 function P.sign(number)
     return (number > 0 and 1) or (number == 0 and 0) or -1
 end
 
+--- Applies a side effect for each element of a table
+--- @generic T
+--- @param table {[any] : T}
+--- @param fn fun(el: T): nil
+function P.each(table, fn)
+    for _, value in ipairs(table) do
+        fn(value)
+    end
+end
+
 return P

main.lua

@@ -2,7 +2,7 @@
 
 require "character"
 
-local camera = require 'camera'
+local camera = require 'lib/camera'
 local Vec3 = require "lib/vec3"
 local tree = require "lib/tree"