Difference between revisions of "Tuto tiny-ecs beatemup Part 4 LevelX"

From GiderosMobile
(wip)
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=== LevelX:init() ===
 
=== LevelX:init() ===
−
I commented out the "move cursor out of the way" code because it was more annoying than necessary! You can use it if you want though.
+
I commented out the "move cursor out of the way" code because it was more annoying than anything else! You can use it if you want.
  
 
==== plugins ====
 
==== plugins ====
−
Here we initialize our plugins. tiny-ecs is declared as a Class variable (''self.tiny'') because we use it outside the init function too. Bump can be local as we only use it in the init function.
+
Here we initialize our plugins. tiny-ecs is declared as a Class variable (''self.tiny'') because we use it outside the init function. Bump can be local as we only use it in the init function.
  
 
It is worth noting that ''tiny.tworld'' is attached to ''self.tiny'' variable. This makes it much easier to access through the rest of the code in our project.
 
It is worth noting that ''tiny.tworld'' is attached to ''self.tiny'' variable. This makes it much easier to access through the rest of the code in our project.
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This one is easy :-)
 
This one is easy :-)
  
 +
We create several layers which will be laid out on top of each other. The background layer will have all the graphics for the background, etc...
  
 +
There is a ''player1inputlayer'' which will capture the user input to control the player, it won't hold any graphics.
  
−
The transitions Class takes 1 argument, that is the next scene to be loaded.
+
==== levels ====
 +
Time to build our levels. The sprite list is a table of all the actors we can interact with (the player, the nmes, collectibles, ...). We put them in a list so we can use that list to sort them in the game (this will be an ECS System).
  
−
There is one MovieClip which plays a fade animation. Feel free to change it to anything you like or change the duration of the clip.
+
''tiny.numberofnmes'' and ''tiny.numberofdestructibleobjects'' are variables we can tune to add a certain amount of enemies and destructible objects in each level.
  
−
When the fading animation is done, all the previous Sprites and their eventual listeners are removed from memory and the new scene is added to the stage.
+
The ''mapdef'' is a table which has the map dimensions, so we can pass it to functions that will require the size of the map for calculations.
 +
 
 +
We use a camera in our game and '''camfollowoffsety''' will offset the camera following the player. It is easier to change it being a variable.
 +
 
 +
The '''buildLevel''' function is where we will build the current level the player is playing. We pass it some variables so it can do its thing that we will see below.
 +
 
 +
Then for the current level the player is in, we set the variables for that level: the camera offset and the number of destructible objects (I should have picked another name!). The destructible objects spawn bonuses (collectibles) when they are destroyed (extended life, jumps).
 +
 
 +
We randomly place the destructible objects throughout the level using the map definition. We place them between 25% and 90% of the map length and a little bit above the bottom of the map.
 +
 
 +
Each destructible objects are entities and we add them to both the tiny-ECS world and the Bump world. We will create entities in the coming parts of the tutorial.
 +
 
 +
==== player1 ====
 +
XXX
  
 
== the menu.lua file ==
 
== the menu.lua file ==

Revision as of 20:15, 14 November 2024

the levelX.lua file

This is where all the fun begins!

The LevelX scene holds the game loop and controls the flow of each levels.

When the scene loads it constructs the level which is organised into layers, more on that in the code comments below ;-)

The code is not that long given it takes care of all 3 levels of the game: level 1, 2 and 3. To make it easy to follow and debug, I use FIGlet (https://en.wikipedia.org/wiki/FIGlet). 

I use this one https://sourceforge.net/projects/figletgenerator/

The LevelX code: 

--!strict

LevelX = Core.class(Sprite)

local random = math.random
local ispaused : boolean = false

function LevelX:init()
	-- bg
	application:setBackgroundColor(g_ui_theme.backgroundcolor)
	-- move the cursor out of the way
--	if not application:isPlayerMode() then
--		local sw, sh = application:get("screenSize") -- the user's screen size!
--		application:set("cursorPosition", sw, sh) -- 0, 0
--	end
	-- _____  _     _    _  _____ _____ _   _  _____ 
	--|  __ \| |   | |  | |/ ____|_   _| \ | |/ ____|
	--| |__) | |   | |  | | |  __  | | |  \| | (___  
	--|  ___/| |   | |  | | | |_ | | | | . ` |\___ \ 
	--| |    | |___| |__| | |__| |_| |_| |\  |____) |
	--|_|    |______\____/ \_____|_____|_| \_|_____/ 
	-- tiny-ecs
	if not self.tiny then self.tiny = require "classes/tiny-ecs" end
	self.tiny.tworld = self.tiny.world()
	-- cbump (cworld)
	local bump = require "cbump"
	local bworld = bump.newWorld()
	-- _           __     ________ _____   _____ 
	--| |        /\\ \   / /  ____|  __ \ / ____|
	--| |       /  \\ \_/ /| |__  | |__) | (___  
	--| |      / /\ \\   / |  __| |  _  / \___ \ 
	--| |____ / ____ \| |  | |____| | \ \ ____) |
	--|______/_/    \_\_|  |______|_|  \_\_____/ 
	local mainlayer = Sprite.new() -- one Sprite to hold them all
	local bglayer = Sprite.new() -- bg layer
	local bgfxlayer = Sprite.new() -- bg fx layer
	local actorslayer = Sprite.new() -- actors layer
	local fgfxlayer = Sprite.new() -- fg fx layer
	local fglayer = Sprite.new() -- fg layer
	local player1inputlayer = Sprite.new() -- player1 input layer
	-- _      ________      ________ _       _____ 
	--| |    |  ____\ \    / /  ____| |     / ____|
	--| |    | |__   \ \  / /| |__  | |    | (___  
	--| |    |  __|   \ \/ / |  __| | |     \___ \ 
	--| |____| |____   \  /  | |____| |____ ____) |
	--|______|______|   \/   |______|______|_____/ 
	-- levels setup
	self.tiny.spriteslist = {} -- the actors
	self.tiny.numberofnmes = 0 -- some enemies
	self.tiny.numberofdestructibleobjects = 0 -- some destructible objects
	local mapdef = {} -- actors walking area (rect: top, left, right, bottom)
	local camfollowoffsety = 0 -- camera follow player1 y offset
	-- build level
	self:buildLevel(bglayer, fglayer, mapdef, actorslayer, bgfxlayer, bworld)
	if g_currlevel == 1 then
		camfollowoffsety = -1.7*32
		self.tiny.numberofdestructibleobjects = 8
	elseif g_currlevel == 2 then
		camfollowoffsety = -2.5*32
		self.tiny.numberofdestructibleobjects = 7
	elseif g_currlevel == 3 then
		camfollowoffsety = -2.5*32
		self.tiny.numberofdestructibleobjects = 6
	end
	-- add levels destructible objects if any
	local el
	for i = 1, self.tiny.numberofdestructibleobjects do
		-- EDestructibleObject:init(xspritelayer, xpos)
		el = EDestructibleObject.new(actorslayer, vector(
			random((mapdef.r-mapdef.l)*0.25, (mapdef.r-mapdef.l)*0.9), -- x
			random(mapdef.t, mapdef.b - 2*32)) -- y
		)
		self.tiny.tworld:addEntity(el)
		bworld:add(el, el.pos.x, el.pos.y, el.collbox.w, el.collbox.h)
	end
	-- _____  _           __     ________ _____  __ 
	--|  __ \| |        /\\ \   / /  ____|  __ \/_ |
	--| |__) | |       /  \\ \_/ /| |__  | |__) || |
	--|  ___/| |      / /\ \\   / |  __| |  _  / | |
	--| |    | |____ / ____ \| |  | |____| | \ \ | |
	--|_|    |______/_/    \_\_|  |______|_|  \_\|_|
	-- EPlayer1:init(xspritelayer, xpos, xbgfxlayer)
	self.player1 = EPlayer1.new(actorslayer, vector(mapdef.l+1*32, mapdef.t+3.2*32), bgfxlayer)
	self.tiny.tworld:addEntity(self.player1)
	bworld:add(self.player1, self.player1.pos.x, self.player1.pos.y, self.player1.collbox.w, self.player1.collbox.h)
	-- _    _ _    _ _____  
	--| |  | | |  | |  __ \ 
	--| |__| | |  | | |  | |
	--|  __  | |  | | |  | |
	--| |  | | |__| | |__| |
	--|_|  |_|\____/|_____/ 
	-- function
	local function map(v, minSrc, maxSrc, minDst, maxDst, clampValue)
		local newV = (v - minSrc) / (maxSrc - minSrc) * (maxDst - minDst) + minDst
		return not clampValue and newV or clamp(newV, minDst >< maxDst, minDst <> maxDst)
	end
	self.tiny.hud = Sprite.new()
	-- hud lives
	self.tiny.hudlives = {}
	local pixellife
	for i = 1, self.player1.currlives do
		pixellife = Pixel.new(0xffff00, 0.8, 16, 16)
		pixellife:setPosition(8+(i-1)*(16+8), 8)
		self.tiny.hud:addChild(pixellife)
		self.tiny.hudlives[i] = pixellife
	end
	-- hud health
	local hudhealthwidth = map(self.player1.currhealth, 0, self.player1.totalhealth, 0, 100)
	self.tiny.hudhealth = Pixel.new(0x00ff00, 2, hudhealthwidth, 8)
	self.tiny.hudhealth:setPosition(8, 8*3.5)
	self.tiny.hud:addChild(self.tiny.hudhealth)
	-- hud jumps
	self.tiny.hudcurrjumps = TextField.new(myttf2, "JUMPS: "..self.player1.currjumps)
	self.tiny.hudcurrjumps:setTextColor(0xffffff)
	self.tiny.hudcurrjumps:setPosition(8, 8*6.5)
	self.tiny.hud:addChild(self.tiny.hudcurrjumps)
	--  _____          __  __ ______ _____            
	-- / ____|   /\   |  \/  |  ____|  __ \     /\    
	--| |       /  \  | \  / | |__  | |__) |   /  \   
	--| |      / /\ \ | |\/| |  __| |  _  /   / /\ \  
	--| |____ / ____ \| |  | | |____| | \ \  / ____ \ 
	-- \_____/_/    \_\_|  |_|______|_|  \_\/_/    \_\
	-- camera: 'content' is a Sprite which holds all your graphics
	self.camera = GCam.new(mainlayer) -- (content [, anchorX, anchorY]) -- anchor default 0.5, 0.5
	self.camera:setAutoSize(true)
	self.camera:setBounds(myappwidth/2, mapdef.t+camfollowoffsety, mapdef.r-myappwidth/2, mapdef.b) -- left, top, right, bottom
	self.camera:setSoftSize(32, 32*1) -- w, h
	self.camera:setDeadSize(32*1.5, 32*1.5) -- w, h
	self.camera:setFollow(self.player1.sprite)
	self.camera:setFollowOffset(0, camfollowoffsety)
--	self.camera:setDebug(true) -- uncomment for camera debug mode
	--  ____  _____  _____  ______ _____  
	-- / __ \|  __ \|  __ \|  ____|  __ \ 
	--| |  | | |__) | |  | | |__  | |__) |
	--| |  | |  _  /| |  | |  __| |  _  / 
	--| |__| | | \ \| |__| | |____| | \ \ 
	-- \____/|_|  \_\_____/|______|_|  \_\
	if bglayer then mainlayer:addChild(bglayer) end
	if self.extragfx then mainlayer:addChild(self.extragfx) end -- you choose!
	if bgfxlayer then mainlayer:addChild(bgfxlayer) end
	mainlayer:addChild(actorslayer)
	if fgfxlayer then mainlayer:addChild(fgfxlayer) end
	if fglayer then mainlayer:addChild(fglayer) end
	self:addChild(self.camera)
	self:addChild(self.tiny.hud)
	self:addChild(player1inputlayer)
	--  _______     _______ _______ ______ __  __  _____ 
	-- / ____\ \   / / ____|__   __|  ____|  \/  |/ ____|
	--| (___  \ \_/ / (___    | |  | |__  | \  / | (___  
	-- \___ \  \   / \___ \   | |  |  __| | |\/| |\___ \ 
	-- ____) |  | |  ____) |  | |  | |____| |  | |____) |
	--|_____/   |_| |_____/   |_|  |______|_|  |_|_____/ 
	self.tiny.tworld:add(
		-- debug
--		SDebugCollision.new(self.tiny),
--	 	SDebugHurtBoxPlayer.new(self.tiny),
--	 	SDebugHurtBoxNme.new(self.tiny),
--		SDebugHitBoxPlayer.new(self.tiny, { true, true, true, true, false, false } ), -- the 6 abilities (granular debugging)
--		SDebugHitBoxNme.new(self.tiny, { true, true, true, true, true, true } ), -- the 6 abilities (granular debugging)
--		SDebugCollectible.new(self.tiny),
--		SDebugSpriteSorting.new(self.tiny),
		-- systems
		SDrawable.new(self.tiny),
		SAnimation.new(self.tiny),
		SPlayer1.new(self.tiny, self.camera),
		SPlayer1Control.new(self.tiny, player1inputlayer),
		SNmes.new(self.tiny, bworld),
		SAI.new(self.tiny, self.player1),
		SDynamicBodies.new(self.tiny, mapdef),
		SDestructibleObjects.new(self.tiny, bworld),
		SCollectible.new(self.tiny, bworld, self.player1),
		SCollision.new(self.tiny, bworld),
		SHitboxHurtboxCollision.new(self.tiny),
		SShadow.new(self.tiny),
		SSpritesSorting.new(self.tiny)
	)
	-- _      ______ _______ _  _____    _____  ____  _ 
	--| |    |  ____|__   __( )/ ____|  / ____|/ __ \| |
	--| |    | |__     | |  |/| (___   | |  __| |  | | |
	--| |    |  __|    | |     \___ \  | | |_ | |  | | |
	--| |____| |____   | |     ____) | | |__| | |__| |_|
	--|______|______|  |_|    |_____/   \_____|\____/(_)
	self:addEventListener(Event.ENTER_FRAME, self.onEnterFrame, self) -- the game loop
	self:myKeysPressed() -- keys handler
end

-- _      ____   ____  _____  
--| |    / __ \ / __ \|  __ \ 
--| |   | |  | | |  | | |__) |
--| |   | |  | | |  | |  ___/ 
--| |___| |__| | |__| | |     
--|______\____/ \____/|_|     
local leveltimer = 128 -- 128, 200, you choose
local endleveltimer = leveltimer
local extragfxx = 0
function LevelX:onEnterFrame(e)
	if self.tiny.numberofnmes <= 0 then endleveltimer -= 1 end
	if not ispaused then
		if endleveltimer < 0 then
			g_currlevel += 1
			if g_currlevel > g_totallevels then
				endleveltimer = leveltimer -- reset end level timer
				g_currlevel = 1 -- reset current level
				switchToScene(Win.new()) -- Win
			else
				endleveltimer = leveltimer -- reset end level timer
				switchToScene(LevelX.new()) -- next level
			end
		end
		if self.player1.isactionjump1 or self.player1.isactionjumppunch1 or self.player1.isactionjumpkick1 then
			self.camera:updateXOnly(e.deltaTime)
		else
			self.camera:update(e.deltaTime)
		end
		self.tiny.tworld:update(e.deltaTime) -- tiny world (last)
		if self.extragfx then
			extragfxx = self.extragfx:getX()
			extragfxx -= 196*e.deltaTime
			if extragfxx < -self.extragfx:getWidth() then extragfxx = self.wagonr end
			self.extragfx:setX(extragfxx)
		end
	end
end

-- levels graphics
function LevelX:buildLevel(xbglayer, xfglayer, xmapdef, xactorslayer, xbgfxlayer, xbworld)
	local el
	-- ____   _____ _____   ____  _    _ _   _ _____             _   _ _____  
	--|  _ \ / ____|  __ \ / __ \| |  | | \ | |  __ \      /\   | \ | |  __ \ 
	--| |_) | |  __| |__) | |  | | |  | |  \| | |  | |    /  \  |  \| | |  | |
	--|  _ <| | |_ |  _  /| |  | | |  | | . ` | |  | |   / /\ \ | . ` | |  | |
	--| |_) | |__| | | \ \| |__| | |__| | |\  | |__| |  / ____ \| |\  | |__| |
	--|____/ \_____|_|  \_\\____/ \____/|_| \_|_____/  /_/    \_\_| \_|_____/ 
	-- ______ _____ _____   ____  _    _ _   _ _____  
	--|  ____/ ____|  __ \ / __ \| |  | | \ | |  __ \ 
	--| |__ | |  __| |__) | |  | | |  | |  \| | |  | |
	--|  __|| | |_ |  _  /| |  | | |  | | . ` | |  | |
	--| |   | |__| | | \ \| |__| | |__| | |\  | |__| |
	--|_|    \_____|_|  \_\\____/ \____/|_| \_|_____/ 
	if g_currlevel == 1 then
		-- THE BACKGROUND AND FOREGROUND IF ANY
		el = DrawLevelsTiled.new(xbglayer,
			{
				"gfx/levels/beu_lvl1/untitled_0001.png",
				"gfx/levels/beu_lvl1/untitled_0002.png",
				"gfx/levels/beu_lvl1/untitled_0003.png",
			}, 0*32)
		el = DrawLevelsTiled.new(xfglayer,
			{
				"gfx/levels/beu_lvl1/beu_fg_lvl1_0001.png",
				"gfx/levels/beu_lvl1/beu_fg_lvl1_0002.png",
				"gfx/levels/beu_lvl1/beu_fg_lvl1_0003.png",
			}, 12*32)
		-- map definition (top, left, right, bottom)
		xmapdef.t, xmapdef.l = 9.5*32, 0*32 -- magik XXX
		xmapdef.r, xmapdef.b = el.mapwidth, xmapdef.t + 5.3*32 -- magik XXX
	elseif g_currlevel == 2 then
		-- the background and foreground if any
		el = DrawLevelsTiled.new(xbglayer,
			{
				"gfx/levels/beu_lvl2/untitled_0001.png",
				"gfx/levels/beu_lvl2/untitled_0002.png",
				"gfx/levels/beu_lvl2/untitled_0003.png",
			}, 0*32)
		el = DrawLevelsTiled.new(xfglayer,
			{
				"gfx/levels/beu_lvl1/beu_fg_lvl1_0001.png",
				"gfx/levels/beu_lvl1/beu_fg_lvl1_0002.png",
				"gfx/levels/beu_lvl1/beu_fg_lvl1_0003.png",
			}, 12*32)
		-- map definition (top, left, right, bottom)
		xmapdef.t, xmapdef.l = 8.55*32, 0*32 -- magik XXX
		xmapdef.r, xmapdef.b = el.mapwidth, xmapdef.t + 6*32 -- magik XXX
	elseif g_currlevel == 3 then
		-- the background and foreground if any
		el = DrawLevelsTiled.new(xbglayer,
			{
				"gfx/levels/beu_lvl3/untitled_0001.png",
				"gfx/levels/beu_lvl3/untitled_0002.png",
				"gfx/levels/beu_lvl3/untitled_0003.png",
			}, 0*32)
		el = DrawLevelsTiled.new(xfglayer,
			{
				"gfx/levels/beu_lvl3/untitledfg_0001.png",
				"gfx/levels/beu_lvl3/untitledfg_0002.png",
				"gfx/levels/beu_lvl3/untitledfg_0003.png",
			}, 0*32)
		xfglayer:setAlpha(0.87)
		-- map definition (top, left, right, bottom)
		xmapdef.t, xmapdef.l = 8.9*32, 0*32 -- magik XXX
		xmapdef.r, xmapdef.b = el.mapwidth, xmapdef.t + 6*32 -- magik XXX
	end
	-- _______ _    _ ______   ______ _   _ ______ __  __ _____ ______  _____ 
	--|__   __| |  | |  ____| |  ____| \ | |  ____|  \/  |_   _|  ____|/ ____|
	--   | |  | |__| | |__    | |__  |  \| | |__  | \  / | | | | |__  | (___  
	--   | |  |  __  |  __|   |  __| | . ` |  __| | |\/| | | | |  __|  \___ \ 
	--   | |  | |  | | |____  | |____| |\  | |____| |  | |_| |_| |____ ____) |
	--   |_|  |_|  |_|______| |______|_| \_|______|_|  |_|_____|______|_____/ 
	-- ENmeX:init(xspritelayer, x, y, dx, dy, xbgfxlayer)
	if g_currlevel == 1 then
		for i = 1, 6 do
			el = ENme1.new(xactorslayer,
				vector(random((xmapdef.r-xmapdef.l)*0.3, (xmapdef.r-xmapdef.l)*0.7), random(xmapdef.t, xmapdef.b-1*32)),
				random(12, 24)*16, random(myappheight*0.2), xbgfxlayer)
			self.tiny.tworld:addEntity(el)
			self.tiny.numberofnmes += 1
			xbworld:add(el, el.pos.x, el.pos.y, el.collbox.w, el.collbox.h)
		end
		for i = 1, 6 do
			el = ENme2.new(xactorslayer,
				vector(random((xmapdef.r-xmapdef.l)*0.75, (xmapdef.r-xmapdef.l)*1), random(xmapdef.t, xmapdef.b-2*32)),
				random(12, 24)*16, random(myappheight*0.1), xbgfxlayer)
			self.tiny.tworld:addEntity(el)
			self.tiny.numberofnmes += 1
			xbworld:add(el, el.pos.x, el.pos.y, el.collbox.w, el.collbox.h)
		end
	elseif g_currlevel == 2 then
		for i = 1, 7 do
			el = ENme1.new(xactorslayer,
				vector(random((xmapdef.r-xmapdef.l)*0.25, (xmapdef.r-xmapdef.l)*0.75), random(xmapdef.t, xmapdef.b-1*32)),
				random(12, 24)*16, random(myappheight*0.2), xbgfxlayer)
			self.tiny.tworld:addEntity(el)
			self.tiny.numberofnmes += 1
			xbworld:add(el, el.pos.x, el.pos.y, el.collbox.w, el.collbox.h)
		end
		for i = 1, 7 do
			el = ENme3.new(xactorslayer,
				vector(random((xmapdef.r-xmapdef.l)*0.75, (xmapdef.r-xmapdef.l)*1), random(xmapdef.t, xmapdef.b-1*32)),
				random(12, 24)*16, random(myappheight*0.1), xbgfxlayer)
			self.tiny.tworld:addEntity(el)
			self.tiny.numberofnmes += 1
			xbworld:add(el, el.pos.x, el.pos.y, el.collbox.w, el.collbox.h)
		end
	elseif g_currlevel == 3 then
		for i = 1, 8 do
			el = ENme1.new(xactorslayer,
				vector(random((xmapdef.r-xmapdef.l)*0.2, (xmapdef.r-xmapdef.l)*0.75), random(xmapdef.t, xmapdef.b-1*32)),
				random(12, 24)*16, random(myappheight*0.2), xbgfxlayer)
			self.tiny.tworld:addEntity(el)
			self.tiny.numberofnmes += 1
			xbworld:add(el, el.pos.x, el.pos.y, el.collbox.w, el.collbox.h)
		end
		for i = 1, 8 do
			el = ENme3.new(xactorslayer,
				vector(random((xmapdef.r-xmapdef.l)*0.5, (xmapdef.r-xmapdef.l)*0.9), random(xmapdef.t, xmapdef.b-1*32)),
				random(12, 24)*16, random(myappheight*0.1), xbgfxlayer)
			self.tiny.tworld:addEntity(el)
			self.tiny.numberofnmes += 1
			xbworld:add(el, el.pos.x, el.pos.y, el.collbox.w, el.collbox.h)
		end
		for i = 1, 3 do
			el = ENme4.new(xactorslayer,
				vector(random((xmapdef.r-xmapdef.l)*0.8, (xmapdef.r-xmapdef.l)*1), random(xmapdef.t, xmapdef.b-2*32)),
				random(12, 24)*16, random(myappheight*0.1), xbgfxlayer)
			self.tiny.tworld:addEntity(el)
			self.tiny.numberofnmes += 1
			xbworld:add(el, el.pos.x, el.pos.y, el.collbox.w, el.collbox.h)
		end
	end
	-- ________   _________ _____               _____ ________   __
	--|  ____\ \ / /__   __|  __ \     /\      / ____|  ____\ \ / /
	--| |__   \ V /   | |  | |__) |   /  \    | |  __| |__   \ V / 
	--|  __|   > <    | |  |  _  /   / /\ \   | | |_ |  __|   > <  
	--| |____ / . \   | |  | | \ \  / ____ \  | |__| | |     / . \ 
	--|______/_/ \_\  |_|  |_|  \_\/_/    \_\  \_____|_|    /_/ \_\
	if g_currlevel == 1 then
		-- nothing here
	elseif g_currlevel == 2 then
		-- nothing here
	elseif g_currlevel == 3 then
		-- a moving wagon
		self.extragfx = Bitmap.new(Texture.new("gfx/levels/beu_lvl3/subway_car.001_0013.png"))
		self.extragfx:setScale(0.65)
		self.wagonr = xmapdef.r
		self.extragfx:setPosition(random(xmapdef.r*0.5, xmapdef.r), 1*myappheight/10)
	end
	-- cleaning?
	el = nil
	collectgarbage()
end

-- keys handler
function LevelX:myKeysPressed()
	self:addEventListener(Event.KEY_DOWN, function(e) -- KEY_UP
		-- Menu
		if e.keyCode == KeyCode.ESC or e.keyCode == KeyCode.BACK then switchToScene(Menu.new()) end
		-- pause
		if e.keyCode == KeyCode.P then ispaused = not ispaused end
		-- modifiers
		local modifier = application:getKeyboardModifiers()
		local alt = (modifier & KeyCode.MODIFIER_ALT) > 0
		-- nothing here!
		if not alt and e.keyCode == KeyCode.ENTER then
		-- switch fullscreen
		elseif alt and e.keyCode == KeyCode.ENTER then
			ismyappfullscreen = not ismyappfullscreen
			application:setFullScreen(ismyappfullscreen)
		end
	end)
end

levelX.lua Code comments

Let's break it down!

The --!strict thing is some Luau stuff I was messing around with, you can find more information here: https://devforum.roblox.com/t/luau-type-checking-beta/435382#strict-mode-5.

I declare 2 variables which are local to the Class because I didn't want to use self on them. The random variable caches the math.random function for speed. I am also experimenting here with Luau type annotations https://devforum.roblox.com/t/luau-type-checking-beta/435382#new-syntax-6. 

local random = math.random
local ispaused : boolean = false

LevelX:init()

I commented out the "move cursor out of the way" code because it was more annoying than anything else! You can use it if you want.

plugins

Here we initialize our plugins. tiny-ecs is declared as a Class variable (self.tiny) because we use it outside the init function. Bump can be local as we only use it in the init function.

It is worth noting that tiny.tworld is attached to self.tiny variable. This makes it much easier to access through the rest of the code in our project.

layers

This one is easy :-)

We create several layers which will be laid out on top of each other. The background layer will have all the graphics for the background, etc...

There is a player1inputlayer which will capture the user input to control the player, it won't hold any graphics.

levels

Time to build our levels. The sprite list is a table of all the actors we can interact with (the player, the nmes, collectibles, ...). We put them in a list so we can use that list to sort them in the game (this will be an ECS System).

tiny.numberofnmes and tiny.numberofdestructibleobjects are variables we can tune to add a certain amount of enemies and destructible objects in each level.

The mapdef is a table which has the map dimensions, so we can pass it to functions that will require the size of the map for calculations.

We use a camera in our game and camfollowoffsety will offset the camera following the player. It is easier to change it being a variable.

The buildLevel function is where we will build the current level the player is playing. We pass it some variables so it can do its thing that we will see below.

Then for the current level the player is in, we set the variables for that level: the camera offset and the number of destructible objects (I should have picked another name!). The destructible objects spawn bonuses (collectibles) when they are destroyed (extended life, jumps).

We randomly place the destructible objects throughout the level using the map definition. We place them between 25% and 90% of the map length and a little bit above the bottom of the map.

Each destructible objects are entities and we add them to both the tiny-ECS world and the Bump world. We will create entities in the coming parts of the tutorial.

player1

XXX

the menu.lua file

The menu.lua file is the same as the one in Gideros Game Template1. We add some buttons to our menu you can navigate with the mouse and the keyboard.

The code:

main.lua Code comments

The only thing I could say is calling the self:updateButtons() function asynchronously so we let the menu fully load before calling an update on the buttons.

Next?

We quickly went through what is already in the Gideros Game Template1 tutorial. The next part is really where this beat'em up tutorial begins: the LevelX scene...


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Next: Tuto tiny-ecs beatemup Part 5 XXX


Tutorial - tiny-ecs beatemup

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