exercise 44

def/Object.d.lua

@@ -1,8 +1,8 @@
----@diagnostic disable: undefined-field
 ---@meta
 ---@module 'classic'
 
 ---@class Object
+---@field super Object|nil # Parent class methods (for inheritance)
 local Object = {}
 
 ---Create a new instance of the class.

def/Timer.d.lua

@@ -30,7 +30,7 @@ function Timer:every(interval, func, ...) end
 ---@param duration number
 ---@param subject table
 ---@param target table
----@param easing? function
+---@param easing? string
 ---@param after? function
 ---@return function cancel_function
 function Timer:tween(duration, subject, target, easing, after) end

main.lua

@@ -1,7 +1,8 @@
--- debug
+-- debug --
 if os.getenv("LOCAL_LUA_DEBUGGER_VSCODE") == "1" then
+    DEBUG = true
     require("lldebugger").start()
-end
+else DEBUG = false end
 
 -- libraries --
 ---@type Object
@@ -13,6 +14,9 @@ Timer = require 'lib/hump/timer'
 
 -- objects --
 Room = require 'obj/Room'
+Circle = require 'obj/Circle'
+Rectangle = require 'obj/Rectangle'
+Polygon = require 'obj/Polygon'
 
 function love.load()
     ---@type Room|nil
@@ -20,8 +24,10 @@ function love.load()
 
     -- load rooms
     local room_files = {}
+    print('loading rooms:')
     recursiveEnumerate('rooms', room_files)
-    requireFiles(room_files)
+    for _,v in ipairs(room_files) do print('',v) end
+    requireFiles(room_files, true)
 
     -- load input
     input = Baton.new {
@@ -30,7 +36,8 @@ function love.load()
             right = {'key:right', 'key:d'},
             up = {'key:up', 'key:w'},
             down = {'key:down', 'key:s'},
-            action = {'key:z', 'key:space'}
+            action = {'key:z', 'key:space'},
+            f1 = {'key:f1'}, f2 = {'key:f2'}, f3 = {'key:f3'}
         },
         pairs = {
             move = {'left', 'right', 'up', 'down'}
@@ -41,6 +48,9 @@ end
 function love.update(dt)
     input:update(dt)
     if current_room then current_room:update(dt) end
+    if input:pressed('f1') then gotoRoom('CircleRoom') end
+    if input:pressed('f2') then gotoRoom('RectangleRoom') end
+    if input:pressed('f3') then gotoRoom('PolygonRoom') end
 end
 
 function love.draw()
@@ -54,22 +64,29 @@ function recursiveEnumerate(folder, file_list)
     local items = love.filesystem.getDirectoryItems(folder)
     for _, item in ipairs(items) do
         local file = folder .. '/' .. item
----@diagnostic disable-next-line: undefined-field
-        if love.filesystem.isFile(file) then
-            table.insert(file_list, file)
----@diagnostic disable-next-line: undefined-field
-        elseif love.filesystem.isDirectory(file) then
-            recursiveEnumerate(file, file_list)
+        local info = love.filesystem.getInfo(file)
+
+        if info then  -- exists (covers both files and directories)
+            if info.type == "file" then
+                table.insert(file_list, file)
+            elseif info.type == "directory" then
+                recursiveEnumerate(file, file_list)
+            end
         end
     end
 end
 
 ---Load files table as lua modules.
 ---@param files table table containing files to be loaded
-function requireFiles(files)
+---@param should_return boolean|nil whether required files return a table/object
+function requireFiles(files, should_return)
+    local returns = should_return or false
     for _, file in ipairs(files) do
-        local file = file:sub(1, -5)
-        require(file)
+        local module = file:sub(1, -5)
+        if not returns then require(module) else
+            local filename = module:match("([^/]+)$")
+            _G[filename] = require(module)
+        end
     end
 end
 
@@ -77,5 +94,12 @@ end
 ---@param room_type string the name of the room as registered
 ---@param ... any arguments passed to the room constructor
 function gotoRoom(room_type, ...)
+    local Class = _G[room_type]
+    if not Class then
+        error("room '"..room_type.."' not found in _G")
+    end
+    if type(Class) ~= "table" and type(Class) ~= "function" then
+        error("room '"..room_type.."' is not callable (got "..type(Class)..", does room return itself?)")
+    end
     current_room = _G[room_type](...)
 end

obj/Circle.lua

@@ -0,0 +1,21 @@
+---@class Circle:Object circle object
+---@field x number horizontal position of circle
+---@field y number vertical position of circle
+---@field radius number radius of circle
+---@field mode string drawing mode of circle
+local Circle = Object:extend()
+
+function Circle:new(config)
+    self.x = config.x or 400
+    self.y = config.y or 300
+    self.radius = config.radius or 50
+    self.mode = config.mode or "fill"
+end
+
+function Circle:update(dt) end
+
+function Circle:draw()
+    love.graphics.circle(self.mode, self.x, self.y, self.radius)
+end
+
+return Circle

obj/Polygon.lua

@@ -0,0 +1,17 @@
+---@class Polygon:Object Polygon object
+---@field mode string drawing mode of Polygon
+---@field points any points of Polygon
+local Polygon = Object:extend()
+
+function Polygon:new(mode, ...)
+    self.mode = mode or "fill"
+    self.points = {...} or {100,100, 200,100, 150,200}
+end
+
+function Polygon:update(dt) end
+
+function Polygon:draw()
+    love.graphics.polygon(self.mode, self.points)
+end
+
+return Polygon

obj/Rectangle.lua

@@ -0,0 +1,23 @@
+---@class Rectangle:Object Rectangle object
+---@field x number horizontal position of Rectangle
+---@field y number vertical position of Rectangle
+---@field mode string drawing mode of Rectangle
+---@field width number width of Rectangle
+---@field height number height of Rectangle
+local Rectangle = Object:extend()
+
+function Rectangle:new(config)
+    self.x = config.x or 400
+    self.y = config.y or 300
+    self.mode = config.mode or "fill"
+    self.width = config.width or 100
+    self.height = config.height or 60
+end
+
+function Rectangle:update(dt) end
+
+function Rectangle:draw()
+    love.graphics.rectangle(self.mode, self.x, self.y, self.width, self.height)
+end
+
+return Rectangle

rooms/CircleRoom.lua

@@ -0,0 +1,29 @@
+---@class CircleRoom:Room
+---@field circle Circle
+---@field super Room
+---@field radtween number
+---@field timer Timer
+local CircleRoom = Room:extend()
+
+function CircleRoom:new()
+    CircleRoom.super.new(self)
+    self.radtween = 50
+    self.circle = Circle{radius = self.radtween}
+    self.timer = Timer()
+end
+
+function CircleRoom:update(dt)
+    CircleRoom.super.update(self, dt)
+    if input:pressed('action') then
+        self.timer:tween(1, self.circle, {radius = 100}, 'in-out-cubic')
+    end
+    self.circle:update(dt)
+    self.timer:update(dt)
+end
+
+function CircleRoom:draw()
+    CircleRoom.super.draw(self)
+    self.circle:draw()
+end
+
+return CircleRoom

rooms/PolygonRoom.lua

@@ -0,0 +1,27 @@
+---@class PolygonRoom:Room
+---@field polygon Polygon
+---@field super Room
+---@field timer Timer
+local PolygonRoom = Room:extend()
+
+function PolygonRoom:new()
+    PolygonRoom.super.new(self)
+    self.polygon = Polygon('fill', 100,100, 200,100, 150,200)
+    self.timer = Timer()
+end
+
+function PolygonRoom:update(dt)
+    PolygonRoom.super.update(self, dt)
+    if input:pressed('action') then
+        self.polygon.mode = 'line'
+    end
+    self.polygon:update(dt)
+    self.timer:update(dt)
+end
+
+function PolygonRoom:draw()
+    PolygonRoom.super.draw(self)
+    self.polygon:draw()
+end
+
+return PolygonRoom

rooms/RectangleRoom.lua

@@ -0,0 +1,27 @@
+---@class RectangleRoom:Room
+---@field rectangle Rectangle
+---@field super Room
+---@field timer Timer
+local RectangleRoom = Room:extend()
+
+function RectangleRoom:new()
+    RectangleRoom.super.new(self)
+    self.rectangle = Rectangle{}
+    self.timer = Timer()
+end
+
+function RectangleRoom:update(dt)
+    RectangleRoom.super.update(self, dt)
+    if input:pressed('action') then
+        self.timer:tween(1, self.rectangle, {width = 50}, 'in-out-cubic')
+    end
+    self.rectangle:update(dt)
+    self.timer:update(dt)
+end
+
+function RectangleRoom:draw()
+    RectangleRoom.super.draw(self)
+    self.rectangle:draw()
+end
+
+return RectangleRoom