Can anyone tell me how to do gamestates?
this is the basic, very simple, I did so for you to understand, there are many ways to implement it…
function setup()
state = 1
end
function draw()
if state == 1 then
--Do whatever you want in this state
end
if state == 2
--Do whatever you want in this state
end
end
EDIT: Also, it appears this thread was post about 15 minutes after your other one. Please A: Try to spend at least an hour trying to figure it out yourself. B: Ask your problem on the other post you made. C: Use the forums search button. I
http://twolivesleft.com/Codea/Talk/discussion/comment/29113
http://twolivesleft.com/Codea/Talk/discussion/3955/simple-scene-selecter-state-machine#Item_20
that’s 2 handy links 
-- GameStates
function setup()
print("GAMESTATE EXAMPLE")
PhysicsBodies = {}
z = example2()
page2 = Buttons(WIDTH/2,HEIGHT/2,"TOUCH HERE",nextPage)
end
-- This function gets called once every frame
function draw()
-- This sets a dark background color
background(40, 40, 50)
strokeWidth(5)
page2:draw()
if GameState == "NEXTPAGE" then --> if state is new, change
z:draw()
end
end
function touched(touch)
page2:touched(touch)
if GameState == "NEXTPAGE" then
-- z.touched(touch)
end
end
--> FUNCTION TO CALL IN BUTTONS
function nextPage()
-->THIS IS THE BASIC
-->CALL CHANGE STATE TO CHANGE THE PAGE
ChangeState("NEXTPAGE",z.init)
end
-----------------------------------
--> THIS FUNCTION CHANGE THE STATE
-----------------------------------
function ChangeState(State,funct)
for k,v in pairs(PhysicsBodies) do
v:destroy()
v=nil
end
PhysicsBodies={}
funct()
GameState=State --> the original state
end
------------------
--> ANOTHER CLASS
------------------
example2 = class()
function example2:init()
end
function example2:draw()
background(255)
text("New Page Using Change State(Game States)",WIDTH/2,HEIGHT/2)
end
Buttons = class()
--> A SIMPLE BUTTON CLASS
function Buttons:init(x,y,txt,funct,Mode,l,h)
self.x = x
self.y = y
fontSize(30)
font("Georgia-Bold")
self.txt = txt
self.Sl,self.Sh = textSize(self.txt)
self.funct = funct
self.l=l or self.Sl+20
self.h=h or self.Sh+20
self.mode=Mode
self.colour=color(175, 158, 44, 255)
end
function Buttons:draw()
pushStyle()
fontSize(30)
font("Copperplate-Bold")
fill(self.colour)
if self.mode then
text(self.txt,self.x+self.l/2,self.y+self.h/2)
else
text(self.txt,self.x,self.y)
end
popStyle()
end
function Buttons:touched(touch)
if self.mode then
self.tx=touch.x-self.l/2
self.ty=touch.y-self.h/2
else
self.tx = touch.x
self.ty = touch.y
end
if self.tx<=self.x + self.l/2 and self.tx>=self.x - self.l/2 and
self.ty>=self.y - self.h/2 and self.ty<=self.y + self.h/2 then
if touch.state==BEGAN then
self.colour=color(251, 251, 251, 255)
self.press=true
elseif touch.state == ENDED and self.press then
self.colour=color(255, 255, 255, 255)
self.funct()
sound(SOUND_PICKUP, 89899)
end
else
self.colour=color(0, 0, 0, 255)
end
if touch.state==ENDED then
self.colour=color(0, 0, 0, 255)
self.press=false
end
end
@MCordova18 Here’s another example of changing states. This example changes states based on where you press on the screen. In an actual game, the game state would change based on what happens in the game.
displayMode(FULLSCREEN)
function setup()
gameState=gameState1
end
function draw()
background(40,40,50)
fill(255)
gameState()
end
function gameState1()
background(172, 78, 78, 119)
sprite("Planet Cute:Character Boy",WIDTH/2,800)
fontSize(30)
text("This is gamestate 1",WIDTH/2,700)
showText()
end
function gameState2()
background(95, 173, 101, 119)
sprite("Planet Cute:Character Cat Girl",WIDTH/2,800)
fontSize(30)
text("This is gamestate 2",WIDTH/2,700)
showText()
end
function gameState3()
background(77, 124, 172, 119)
sprite("Planet Cute:Character Horn Girl",WIDTH/2,800)
fontSize(30)
text("This is gamestate 3",WIDTH/2,700)
showText()
end
function gameState4()
background(172, 77, 170, 119)
sprite("Planet Cute:Character Pink Girl",WIDTH/2,800)
fontSize(30)
text("This is gamestate 4",WIDTH/2,700)
showText()
end
function showText()
fontSize(20)
text("You can do whatever you want in this state",WIDTH/2,650)
text("Press here for gamestate 1",WIDTH/2,400)
text("Press here for gamestate 2",WIDTH/2,325)
text("Press here for gamestate 3",WIDTH/2,250)
text("Press here for gamestate 4",WIDTH/2,175)
end
function touched(t)
if t.y>375 and t.y<425 then
gameState=gameState1
end
if t.y>300 and t.y<350 then
gameState=gameState2
end
if t.y>225 and t.y<275 then
gameState=gameState3
end
if t.y>150 and t.y<200 then
gameState=gameState4
end
end
Here is my modified version of something @Briarfox posted:
--# Main
--The name of the project must match your Codea project name if dependencies are used.
--Project: Scene Selecter
--Version: Alpha 1.0
--Comments:
function setup()
--Name your scenes
Scene = SceneManager()
Scene:addScene("menu", Title)
Scene:addScene("play", Game)
Scene:addScene("end", End)
Scene:change("menu")
end
function draw()
Scene:draw()
end
function touched(touch)
Scene:touched(touch)
end
--# Scene
SceneManager = class()
function SceneManager:init()
self.viewx = 0
self.touchAllowed = true
self:addScene("__i", {}) -- Create blank instance in case no scenes are added
end
function SceneManager:addScene(id, inst)
if not self.scenes then self.scenes = {} end
self.scenes[id] = inst
if self.scenes[id].init then
self.scenes[id]:init()
end
self.currentScene = id
end
--Change scene
function SceneManager:change(name)
if self.scenes[name] ~= nil then
self.nextScene = name
self:transition()
end
end
function SceneManager:transition()
self.touchAllowed = false
tween(0.75, self, {viewx = -WIDTH}, tween.easing.bounceOut,
function()
self:trueChange()
end)
end
function SceneManager:trueChange()
if self.scenes[self.currentScene].onExit then
self.scenes[self.currentScene]:onExit()
end
collectgarbage()
self.currentScene = self.nextScene
if self.scenes[self.currentScene].onEnter then
self.scenes[self.currentScene]:onEnter()
end
self.nextScene = nil
self.touchAllowed = true
self.viewx = 0
collectgarbage()
end
function SceneManager:draw()
pushStyle()
pushMatrix()
translate(self.viewx, 0)
if self.scenes[self.currentScene].draw then
self.scenes[self.currentScene]:draw()
end
translate(WIDTH, 0)
if self.nextScene ~= nil and self.scenes[self.nextScene].draw then
self.scenes[self.nextScene]:draw()
end
pushStyle()
strokeWidth(5) stroke(0)
line(0, 0, 0, HEIGHT)
popStyle()
popMatrix()
popStyle()
end
function SceneManager:touched(t)
if self.touchAllowed and self.scenes[self.currentScene].touched then
self.scenes[self.currentScene]:touched(t)
end
end
function SceneManager:keyboard(k)
if self.scenes[self.currentScene].keyboard then
self.scenes[self.currentScene]:keyboard(k)
end
end
function SceneManager:orientationChanged(o)
if self.scenes[self.currentScene].orientationChanged then
self.scenes[self.currentScene]:orientationChanged(o)
end
end
function maxn(t)
local amnt = 0
if type(t) == "table" then
for i,v in pairs(t) do
amnt = amnt + 1
end
end
return amnt
end
--# Title
Title = class()
function Title:init(x)
end
function Title:draw()
background(255, 255, 255, 255)
font("Baskerville-Bold")
fontSize(40)
fill(0, 36, 255, 255)
text("Title Screen....\
(Tap to Change)", WIDTH/2, HEIGHT/2)
end
function Title:touched(t)
if t.state == ENDED then
Scene:change("play")
end
end
--# Game
Game = class()
function Game:init(x)
end
function Game:draw()
background(255, 255, 255, 255)
font("Baskerville-Bold")
fontSize(40)
fill(0, 36, 255, 255)
text("Game Screen....\
(Tap to Change)", WIDTH/2, HEIGHT/2)
end
function Game:touched(touch)
if touch.state == ENDED then
Scene:change("end")
end
end
--# End
End = class()
function End:init()
end
function End:draw()
background(255, 255, 255, 255)
font("Baskerville-Bold")
fontSize(40)
fill(0, 36, 255, 255)
text("Game Over Screen....\
(Tap to Change)", WIDTH/2, HEIGHT/2)
end
function End:touched(touch)
if touch.state == ENDED then
Scene:change("menu")
end
end
Very short
MENU = 0
PLAY = 1
state = MENU
function setup()
if state = MENU then
print("Menu")
else
print(Playing")
end