Gamecamp

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Revision as of 12:23, 23 May 2010 by Ghoulsblade (talk | contribs)
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http://www.gamecampmunich.de/


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

  • features
    • audio (mitlerweile ganz gut)
    • 2d gfx
    • particle system
    • input
    • box2 physic (etwas wackelig)
  • 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

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)

text ausgeben

love.graphics.setFont("AwesomeFont.ttf", 15) love.graphics.print("This is some awesome text", 100, 100)

input handling

if love.keyboard.isDown( " " ) then print("space pressed") end

function love.keypressed( key, unicode )

  if key == "return" then
     text = "RETURN is being pressed!"
  end

end

mouse_x = love.mouse.getX() mouse_y = love.mouse.getY() if love.mouse.isDown("r") then text = "Mouse button right is pressed" end

collab edit test, didn't work out though