Difference between revisions of "Gamecamp"

Revision as of 12:51, 23 May 2010

http://www.gamecampmunich.de/

• http://www.gamecampmunich.de/sessions/ ! vorschlag eintragen ?
• http://love2d.org/ -- LÖVE
• http://love2d.org/wiki/Main_Page -- Documentation
• http://www.lua.org/ -- LUA
• http://www.lua.org/manual/5.1/ -- LUA Reference
• http://www.lua.org/pil/ -- LUA guide

lua intro

• kein int, alles float
• local a,b,c = MyFun() -- multiple return values
• todo : unpack
• for i=1,10 do ... end
• for i=1,10,2 do ... end -- -> 1 3 5 7 9
• if (cond) then ... elseif (cond) then ... else ... end
• while (cond) do ... end
• kein continue aber break geht
• for k,v in pairs(mytable) do ... end
• for k,v in ipairs(mytable) do ... end
• function bla:blub () ... end  : TODO : implizites self
• print(var1,var2,var3) alle ausgeben
• comments : -- single line --.... multiline/block
• oop über metatables modellierbar
• funktionen sind 1.class variablen (implizite closure) MyFunction(1, function (a,b) return a+b end )
• local a,b,c -- sonst global
• stringcat : "hello" .. " " .. "world"

lua tables

• arrays : starten bei index 1
• arrays : table.insert(mytable,o)
• assoc/map : mytable[name] = value
• set : mytable[o] = true
• key und value any
• löschen = assign nil

utils

• for line in io.lines(filepath) do ... print(line) ... end
• print(debug.traceback("nachricht"))
• assert(wert_der_true_sein_soll,nachricht)
• dofile(filepath) -- TODO : unter löve anders zwecks zip ?
• for a,b,c in string.gmatch(txt,"(%w+)=(%w+):(%w+)") do print(a,b,c) end -- z.b. map-daten laden..
• local startpos,endpos,match1,match2,match3 = string.find(txt,"(%w+)=(%w+):(%w+)")
• table.sort(arr,function (a,b) return a.feld < b.feld end)
• math.max/min/floor/ceil/pi/atan2/
• math.randomseed(os.time()) -- am anfang einmal aufrufen
• math.random() -- [0;1[ float zwischen 0 und 1
• math.random(n) -- n=int -> returns int in range [1;n]
• math.random(n,m) -- n,m=int -> returns int in range [n;m]

löve 0.6.2

• license: zlib ( This is a very liberal license which permits almost anything. )
• http://love2d.org/docs/
• features
  • audio (mitlerweile ganz gut)
  • 2d gfx
  • particle system
  • input
  • box2 physic (etwas wackelig)

rest

• hello world

function love.draw()

   love.graphics.print('Hello World!', 400, 300)

end

• anekdoten
  • ö
  • forum: öbey
  • seltsame libnamen: AnAL (Animation), LUBE (Network), Pölygamy (State, Helpers), Swingers (gesture)

• binary für win,mac,linux
• game als zip (.love) in einem file
• man kann standalone exe bauen (binary + zip dran-ge-cat'ed)
• todo : keypressed/keyisdown
• todo : time/milliseconds
• todo : particle system beispiel? nicht nötig falls zeit knapp

game

• sidescroller
• tyrian gfx pack von lostgarden
• states (menu,game,highscore)
• map (texteditor, vertical)
• enemies,deco,shots spawn from right (map) and despawn
• parallax background / stars
• interaktive : program new enemies
• object system with stepper (createclass? :syntax?)
• löve particle fx

code

skelett und mainloop

cmd> love VERZEICHNIS_MIT_MAIN_LUA/ZIP

main.lua

function love.load() -- was vorbereiten end

function love.draw() -- was malen end

function love.update(dt) -- was tun end

conf.lua

function love.conf(t) t.screen.width = gScreenW t.screen.height = gScreenH t.screen.fullscreen = false t.screen.vsync = true t.screen.fsaa = 0 t.version = 0.6 t.modules.joystick = false t.modules.physics = false t.modules.audio = true t.modules.keyboard = true t.modules.event = true t.modules.image = true t.modules.graphics = true t.modules.timer = true t.modules.mouse = true t.modules.sound = true t.console = false t.title = "GameCampBlub" t.author = "GameCampBlub Crew" end

sprite malen

object = love.graphics.newImage("ball.png") love.graphics.draw(object, 10, 10)

ton abspielen

sound = love.audio.newSource("pling.wav", "static") music = love.audio.newSource("techno.ogg") -- streamed love.audio.play(sound) love.audio.play(music)

input handling

• local t = love.timer.getTime() -- globaler timestamp in sekunden als float
• local x,y = love.mouse.getPosition()
• if love.mouse.isDown("r") then print("Mouse button right is pressed") end
• if (love.keyboard.isDown(" ")) then print("space gedrückt") end TODO : doppelt, unten nochmal
• function love.keypressed(k,unicode) if (k == 'escape') then print("escape gedrückt") os.exit(0) end end
• os.exit(0)  : programm sofort beenden

text ausgeben

love.graphics.setFont("AwesomeFont.ttf", 15) -- TODO : gibts den font standardmässig ? falls nein nen anderen =) love.graphics.print("This is some awesome text", 100, 100)

collab edit test, didn't work out though

• note : http://etherpad.com/
• note : http://ietherpad.com/WkXqSs9AOr
• note : http://piratepad.net/TCRLQs5Bd5