What is LIKO-12?

Specs

Hello world in LIKO-12

(First attempt)

-- Hello World 1
clear(0)
print("HOLA FLISOL!",50,50)
line(12, 12, 50, 60)
						

Code in https://pastebin.com/5pmdw4cL
Run it in LIKO-12: pastebin get 5pmdw4cL hola1.lk12

Hello world in LIKO-12

(Second attempt)

-- Hello World 2
function _init()
 clear(0)
end

function _draw()
 print("HOLA FLISOL!",50,50)
 line(12, 12, 50, 60)
end

function _update()
end
						

Code in https://pastebin.com/C801GkkQ
Run it in LIKO-12: pastebin get C801GkkQ hola2.lk12

Hello world in LIKO-12

(Third attempt)

-- Hello World 3

n = 1
COLORS = {2,4,3,5,6,8,7,9}
max = 30
angle = 60
speed = 15
timer = speed
x = 0      -- initialized in _init()
y = 0      -- initialized in _init()
radius = 0 -- initialized in _init()

function pointCircle(x,y,r,angle_rad)
 return
  x+math.sin(angle_rad)*r,
  y+math.cos(angle_rad)*r
end

function screenDims()
 return {
  x = screenWidth()/2,
  y = screenHeight()/2,
  radius = (screenHeight() < 
   screenWidth()) and
   (screenHeight()/2*0.9) or
   (screenWidth()/2*0.9)
 }
end

function _init()
 clear(0)
 dims = screenDims()
 x = dims.x
 y = dims.y
 radius = dims.radius
end

function _draw()
 clear(0)
 for i=1,n do
  coloralt=(i%#COLORS)+1
  a = math.rad(i*360/max + angle)
  b = math.rad(i*360/max - angle)
  p1_x, p1_y = pointCircle(x,y,radio,a)
  p2_x, p2_y = pointCircle(x,y,radio,b)
  line(p1_x,p1_y,p2_x,p2_y,coloralt)
 end
 print(
  "HOLA FLISOL!",
  screenWidth()/2 - 28,
  screenHeight()/2
 )
end

function _update()
 if timer > 0 then
  timer = timer - 1
  if timer == 0 then
   n = n + 1
   timer = speed
  end
 end
end
						

Code in https://pastebin.com/x7wuaWTH
Run it in LIKO-12: pastebin get x7wuaWTH hola3.lk12

Hello world in LIKO-12

Programming in LIKO-12

(Vou baixar a Lua)

https://www.lua.org/

Some graphical operations

clear(colourn)

print(text, x, y, [colour])

line(x1,y1,x2,y2,[color])

Sprite(tileID,x,y,[rotation])

map(x,y,tx1,ty1,tx2,ty2)

mset(x,y,tile)/mget(x,y)

clip(x1,y1,x2,y2)

cam(...)

Included external libraries

• Middleclass: for classes and subclasses

  
  local Fruit = class("Fruit") -- a class called "Fruit"
  Fruit.static.myvalue = 2 -- static values and function
  function Fruit:initialize(color) -- ...
  local Mango = class("Mango", Fruit) -- subclassing
  							

• Bump: simple collisions, AABB (Axis-aligned bounding box).
• JSON: "as its name says"
• Lume: nicely complements Lua's standard library, very useful for tables.

Editors

Sprites

Sprites

Code

Code

Maps

Maps

Sound

Music (WIP)

...but you can generate it with code

Audio.generate(1,250,1) -- to play a note
Audio.generate()        -- to stop
						

DiskOS, operating system

DiskOS

What can I do?

Install games and demos

In the command line:

install_demos

install_games

Erni's Iceberg (WIP), by Thirite

This game and code available in http://github.com/chiguire/sapper