python approach for 1.4.3.6

[franktreppromo65]

hi, i am currently doing this decoding for myself in a python language. my goal is to merge two friends files but currently i am stuck at the part where you do :

int8[] |For each tile ID with multiple options, in sequence, the number of options is recorded.

int8[] | For each wall ID with multiple options, in sequence, the number of options is recorded.

[franktreppromo65]

MapMerger.zip
so far i have this done

[TruePikachu]

I actually had ported it all over to Python+numpy, though it isn't in a format ready for any sort of release, and I don't quite plan to do more development on it unless I have a good reason to do so. This is the line which does that particular part of the reading.

def iter_bits(bytes_obj):
    for byte in bytes_obj:
        for n in (0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80):
            yield byte&n==n

# tile_has_multiple_options is the raw byte array read from that position in the header
tile_option_count = [
    (f.read(1)[0] if has_mo else 1)
    for i,has_mo in zip(range(n_tiles),iter_bits(tile_has_multiple_options))
]

In a nutshell, the array of int8 that's at that point of the map file is a variable-length array, with length equal to the number of bits set in the prior bit arrays.

[franktreppromo65]

that is perfect ! i sure will get a look around and it will debug my code. if you want to callab with me, i want to merge two friends file of a same map so we can see what other have discovered in a world. i will be working on this repo:https://github.com/franktreppromo65/TerrariaMapMerging