braille.lua

local component = require("component")
local event = require("event")
local gpu = component.gpu

local w, h = 40, 20

local ow, oh = gpu.getResolution()
local brailleindex = {{0x1,0x8},{0x2,0x10},{0x4,0x20},{0x40,0x80}}
local idfk = 0
local btn = {[false] = 0, [true] = 1}

gpu.setResolution(w, h)

function generatePattern()
  local outputstr = ""
  s = math.sin(idfk)
  c = math.cos(idfk)
  for y=0, h-1 do
    for x=0, w-1 do
      local c = 0
      for sy=0, 3 do
        for sx=0, 1 do
          local i = brailleindex[sy+1][sx+1]
          local tx, ty = x * 2 + sx, y * 4 + sy
          local nx, ny = tx + math.sin(idfk) * 50, ty + math.cos(idfk) * 50 -- math.floor(tx * c - ty * s), math.floor(tx * s + ty * c) -- failed attempt at rotozoom
          local p = math.floor(math.sin(nx/4)+math.cos(ny/4)) % 2
          c = c + p * i
        end
      end
      outputstr = outputstr .. unicode.char(0x2800+c)
    end
  end
  return outputstr
end

while true do
  io.write(generatePattern())
  idfk = idfk + 0.025
  if event.pull(0.01, "interrupted") == "interrupted" then
    gpu.setResolution(ow, oh)
    return
  end
end