vgame_world.txt

Here are some thoughts about the world format
because storing all the chunks in memory sucks.

The format still has no name but I would name it
something like VG (as for VGame - project name)
or VX (as for Voxelius - game's name)

Core world configuration is stored in a specific
file called world.toml and placed in the root of
the "world/" subdirectory. This file contains
basic settings for the world such as (TBA) world
height limits, dimensions, etc.

Since there's no dimension support yet, chunks are
stored in the appropriate "world/chunks" subdirectory.
Each chunk is stored in raw binary format. Filenames
are formatted in the following way:
    "c_{cx}_{cy}_{cz}" (cx, cy, cz - chunk position)

CHUNK STORAGE CHANGES:
New world format requires chunks to have a reference
counter that marks specific chunks for unloading:
if a multiple players share the same chunks and if one
of them disconnects, chunks shared with another player
should not be unloaded (I say more - client doesn't even
know that it shares chunks with an another client).

RENDER DISTANCE:
Server render distance is a cylinder with defined radius
and height in which chunks should be sent to the player.
Higher the radius and height, slower the server would work
if there's a lot of chunks.

EMPTY CHUNKS:
Empty chunks are not sent by the server but if a player places
a block in the empty chunk, the server, if not prohibited by
world.toml values, must make this chunk present and broadcast
this event to all the clients in render distance.