Help - Other QR code - Can it be reverse engineered?

Hi guys, I just found your thread. I have also reversed the protocol on my own.

Have you noticed that there are a few hidden tiles? Like the wheel, trashcan and golden ball? Will post an example! =)

 

Ok! I moved the level to a new album only visible for me. Your link should still work!

 

Ok, here is the level again - now attached. =)

Also, here is the list of tiles that I found out:

Spoiler: List of all tiles

Code:

'''
The keys in the dictionary are the tile character used for coding.
The values are tuples of
    description as a string
    the number of extra bytes as an integer
    the representation of the tile for printing, as a single character
'''
tiles = {
    '\x00' : ('Empty',0, ' '),
    '\x01' : ('Stone',0, '#'),
    '\x02' : ('Brick Red',0, 'X'),
    '\x03' : ('Cracked stone*',0, '#'),
    '\x04' : ('Win',0, 'W'),
    '\x05' : ('Stairs',1,'s'),
    '\x06' : ('Trash*', 0, 't'),
    '\x07' : ('Stone Wedge', 1, '/'),
    '\x08' : ('Grass Wedge*', 1, '/'),
    '\x09' : ('Golden ball*', 0, '*'),
    '\x0a' : ('Metal Win*', 1, 'W'),
    '\x0b' : ('Water', 0, '~'),
    '\x0c' : ('Grass',0, '#'),
    '\x0d' : ('Brick Pillar*',0, 'X'),
    '\x0e' : ('Stone corner*',1, '#'),
    '\x0f' : ('Robot Tap to Walk', 1, 'B'),
    '\x10' : ('Zapper',1, 'Z'),
    '\x11' : ('Draggable', 0, 'd'),
    '\x12' : ('Yellow bricks', 0, 'X'),
    '\x13' : ('Wheel*', 1, 'o'),
    '\x14' : ('Metal Stairs*', 1, '/'),
    '\x15' : ('Metal Corner*', 1, '+'),
    '\x16' : ('Motor', 1, 'm'),
    '\x17' : ('Metal box*', 0, '+'),
    '\x18' : ('Alternative stone*', 0, '#'),
    '\x19' : ('Metal', 0, '+'),
    '\x1a' : ('Robot Turns Right', 1, 'R'),
    '\x1b' : ('Eye',0, '0'),
    #'\x1c' : ('Unknown? Behaves strange...',0),
    '\x1d' : ('Alterative stone?',1, '#'),
    '\x1e' : ('Slider Corner',1, 'j'),
    '\x1f' : ('Alternative stone pillar*',1,'#'),
    '\x20' : ('Metal Half Pillar', 1, '+'),
    '\x21' : ('Slider Rail', 1, '|'),
    '\x22' : ('Shiny Metal Half Pillar*', 1, '+'),
    '\x23' : ('Stone Pillar', 1, '#'),
    '\x24' : ('Draggable Pillar*', 1, 'd'),
    '\x25' : ('Ball', 0, '*'),
    '\x26' : ('Shiny Metal?*', 0, '+'),
    '\x27' : ('Metal Pillar', 1, '+'),
    '\x29' : ('Slider', 1, '='),
    '\x2b' : ('Fence', 1, '_')
    }

 

I tried more values as well, but the app does not like values higher than 0x30. The last blocks are all brown metal boxes, I did not include those duplicates.

I'm still confused about the 0x1c tile. It does strange things to tiles around it (removes them?)

 

No, the \x1c tile is just strange. I tried to create an example, but Mekorama complains about corrupted data. I'll just leave that as a note here for when other people starts looking into what new tiles there might be.

 

I uploaded all code I wrote here: https://github.com/LarsH/MekoramaQRdecoder

Not proud of it (ESPECIALLY not the compression/decompression part) but it sort of works. Hope it helps you other guys out. =)

If you can read Swedish (Hej Martin, underbart spel du gjort!), there is also my worklog of how I approached the code and my reversing efforts.

 

Oh man! I've wished for metal stairs at least a dozen times! I wonder what the mechanics of the wheel are. The cylindrical draggable would be very welcome in compact maze type puzzles where adjacent draggables should not move simultaneously.

 

Here, try both the metal stairs and the wheels! The wheels seems to work only when the metal is movable, they fall of otherwise.

Spoiler: Code that created the car level

Code:

def createCar():
    level = []
    for i in range(0x1000):
        level += [ '\x00' ]

    def f(x,y,z,val):
        level[x*16*16+y+z*16] = val
    f(7-5,8,0,'\x19')
    f(8-5,8,0,'\x19')
    f(9-5,8,0,'\x19')
    f(8-5,8,1,'\x14\x00')

    f(7-5,9,0,'\x16\x03')
    f(9-5,9,0,'\x13\x00')

    f(7-5,7,0,'\x13\x02')
    f(9-5,7,0,'\x13\x02')

    f(7,8,0,'\x19')
    f(8,8,0,'\x19')
    f(9,8,0,'\x11')
    f(8,8,1,'\x14\x00')

    f(7,9,0,'\x13\x00')
    f(9,9,0,'\x13\x00')

    f(7,7,0,'\x13\x02')
    f(9,7,0,'\x13\x02')

    createQR('Cars', 'LarsH',level)

 

This thread is opening up so many possibilities I wonder if these are in fact hidden by @Martin Magni should there be an update. I love all the hidden block shapes -- not just for potential new tricks but also for aesthetic reasons. It always bugs me when I have to create convoluted pathways using stone pillars and staircases, and they end up looking like a whole mess with grey patches everywhere Having grass wedges would surely help camouflage many mechanisms as well. And......metal stairs would be really useful in @richardfu_ 's Limbo too.

And the wheel definitely has tons of applications! I'm sure it'll be popular if it ever makes its way into an update.

 

It appears that the Win without stars would turn green when B is on it, but turns back to red when he leaves. This looks like some kind of "checkpoint" that doesn't finish the level right away, but a marker that indicates where the player should go step-by-step

The adjacent cylinder also turns brick red when B is next to it. Probably a glitch for a block that hasn't been finalized

As for the golden ball......Looks like it would always move towards the same direction automatically. Not sure if it's intended to be contained and released by a trigger, so as to hit something in its trajectory. I wonder what might happen if a free motor is attached onto it As seen in @retrograde 's levels, a normal ball would rotate if attached to a motor.