internal.txt

header example:
headerdata = {'spawn': (2100, 150), 'groundlevel': 385.0, 'is_bloodmoon': 0, 'dungeon_xy': (2100, 200), 'worldrect': (0, 67200, 0, 19200), 'is_meteor_spawned': 0, 'gob_inv_time': 0, 'rocklevel': 487.0, 'gob_inv_x': 0.0, 'is_day': 1, 'shadow_orbs_broken': 0, 'width': 4200, 'version': 22, 'gob_inv_type': 0, 'bosses_slain': (0, 0, 0), 'gob_inv_size': 0, 'height': 1200, 'ID': 1394008700, 'moonphase': 0, 'name': 'imthename', 'is_a_shadow_orb_broken': 0, 'time': 13000.0}

'version' is the minimal Terraria version required to load it;
here are some numbers:
versions = {22 : "1.0.6.1",
            12 : "1.0.5"}
bosses_slain : (EoC, EoW, Skeletron)
'ID': *unique* Identication umber of world


tile = (tile_id_or_null,
	wall_id_or_null,
	liquid,
	multitiledata_or_null)
liquid= 0 equals nothing
255 -> max water
-255 -> max lava
liquid cant be null, it needs to be integer type

multitiledata = (x,y)
xy = postion on texture

itemdata = (amount,item)
if a itemdata is empty, its (0, null)

chestdata = ((x,y),
	 itemdata, itemdata,itemdata,itemdata,itemdata,
	 itemdata, itemdata,itemdata,itemdata,itemdata,
	 itemdata, itemdata,itemdata,itemdata,itemdata,
	 itemdata, itemdata,itemdata,itemdata,itemdata)
chest = chestdata_or_null

sign = ((x,y), text)

npc = (name, (pos_x, pos_y), has_home, (x,y))
usually pos_x and pos_y = x*16 and y*16

All x/y values are the top left tile of the object


all =
{tiles : width*height amount of tile,
header : headerdata,
chests : exactly 1000 times chest,
signs : up to 1000 times sign,
npcs : up to 1000 times npc
}