Read and write Across levels

[hexjelly]

There are multiple different Across level formats, so they need to have their own parsers (probably).
More or less copypaste the Elma level read/write structure, but for Across. How hard can it be? 🤷

Opening and then writing a level should return the same bytes (if possible?)

[hexjelly]

Reference: jon "information"

acros lev file structure
------------------------


Type       Size  Data
----------------------------
char[5]       5  "POT06"
double        8  integrity1?
double        8  integrity2?
double        8  integrity3?
double        8  integrity4?
              4  duno
char[14?]    14  Name of the lev
             45  000000000..........
double        8  Number of polygons + 0.4643643
POLYGON[]     -  
double        8  Number of objects + 0.4643643
OBJECT[]      -  


POLYGON:

Type     Size  Data
------------------------------------
dword       4  Number of vertice
VERTEX[]    -  A vertex is just two doubles : x and y. 16 bytes of course.


OBJECT:

Type     Size  Data
------------------------------------
double      8  Position : x
double      8  Position : y
dword       4  Type (1 = flower, 2 = food, 3 = killer, 4 = start)

Also see domi's python lib

[PabloCorso]

sunl (Discord):

This 20-year-old level doesn't have a top ten in the .lev file, meaning it opens fine in eol.exe but is interpreted as corrupted by elmanager and probably other 3rd party programs
As a refresher, across levels in across.exe don't have a topten, but it's appended at the end of the file by elma.exe. That's why the top ten data is considered optional by elma.exe

Level: https://elma.online/levels/591083

Import failed: Failed to parse .lev file: Top10 buffer length expected to be 688, got 0