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MineClone5/mods/CORE/mcl_mapgen/init.lua

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mcl_mapgen = {}
local order = { -- mcl_mapgen.order...
DEFAULT = 5000,
CHORUS = 100000,
BUILDINGS = 200000,
VILLAGES = 900000,
DUNGEONS = 950000,
STRONGHOLDS = 999999,
OCEAN_MONUMENT = 1000000,
LARGE_BUILDINGS = 2000000,
}
local math_floor = math.floor
local math_max = math.max
local minetest_get_node = minetest.get_node
local minetest_get_voxel_manip = minetest.get_voxel_manip
local minetest_log = minetest.log
local minetest_pos_to_string = minetest.pos_to_string
-- Calculate mapgen_edge_min/mapgen_edge_max
mcl_mapgen.CS = math_max(1, tonumber(minetest.get_mapgen_setting("chunksize")) or 5)
mcl_mapgen.BS = math_max(1, core.MAP_BLOCKSIZE or 16)
mcl_mapgen.LIMIT = math_max(1, tonumber(minetest.get_mapgen_setting("mapgen_limit")) or 31000)
mcl_mapgen.MAX_LIMIT = 31000 -- MAX_MAP_GENERATION_LIMIT, https://github.com/minetest/minetest/issues/10428
mcl_mapgen.OFFSET = - math_floor(mcl_mapgen.CS / 2)
mcl_mapgen.OFFSET_NODES = mcl_mapgen.OFFSET * mcl_mapgen.BS
mcl_mapgen.CS_NODES = mcl_mapgen.CS * mcl_mapgen.BS
mcl_mapgen.LAST_BLOCK = mcl_mapgen.CS - 1
mcl_mapgen.LAST_NODE_IN_BLOCK = mcl_mapgen.BS - 1
mcl_mapgen.LAST_NODE_IN_CHUNK = mcl_mapgen.CS_NODES - 1
mcl_mapgen.HALF_CS_NODES = math_floor(mcl_mapgen.CS_NODES / 2)
mcl_mapgen.HALF_BS = math_floor(mcl_mapgen.BS / 2)
mcl_mapgen.CS_3D = mcl_mapgen.CS^3
mcl_mapgen.CHUNK_WITH_SHELL = mcl_mapgen.CS + 2
mcl_mapgen.CHUNK_WITH_SHELL_3D = mcl_mapgen.CHUNK_WITH_SHELL^3
local central_chunk_min_pos = mcl_mapgen.OFFSET * mcl_mapgen.BS
local central_chunk_max_pos = central_chunk_min_pos + mcl_mapgen.CS_NODES - 1
local ccfmin = central_chunk_min_pos - mcl_mapgen.BS -- Fullminp/fullmaxp of central chunk, in nodes
local ccfmax = central_chunk_max_pos + mcl_mapgen.BS
local mapgen_limit_b = math_floor(math.min(mcl_mapgen.LIMIT, mcl_mapgen.MAX_LIMIT) / mcl_mapgen.BS)
local mapgen_limit_min = - mapgen_limit_b * mcl_mapgen.BS
local mapgen_limit_max = (mapgen_limit_b + 1) * mcl_mapgen.BS - 1
local numcmin = math_max(math_floor((ccfmin - mapgen_limit_min) / mcl_mapgen.CS_NODES), 0) -- Number of complete chunks from central chunk
local numcmax = math_max(math_floor((mapgen_limit_max - ccfmax) / mcl_mapgen.CS_NODES), 0) -- fullminp/fullmaxp to effective mapgen limits.
mcl_mapgen.EDGE_MIN = central_chunk_min_pos - numcmin * mcl_mapgen.CS_NODES
mcl_mapgen.EDGE_MAX = central_chunk_max_pos + numcmax * mcl_mapgen.CS_NODES
minetest_log("action", "[mcl_mapgen] World edges: mcl_mapgen.EDGE_MIN = " .. tostring(mcl_mapgen.EDGE_MIN) .. ", mcl_mapgen.EDGE_MAX = " .. tostring(mcl_mapgen.EDGE_MAX))
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Mapgen variables
local overworld, end_, nether = {}, {}, {}
local seed = minetest.get_mapgen_setting("seed")
mcl_mapgen.seed = seed
mcl_mapgen.name = minetest.get_mapgen_setting("mg_name")
mcl_mapgen.v6 = mcl_mapgen.name == "v6"
mcl_mapgen.flat = mcl_mapgen.name == "flat"
mcl_mapgen.superflat = mcl_mapgen.flat and minetest.get_mapgen_setting("mcl_superflat_classic") == "true"
mcl_mapgen.singlenode = mcl_mapgen.name == "singlenode"
mcl_mapgen.normal = not mcl_mapgen.superflat and not mcl_mapgen.singlenode
local flat, superflat, singlenode, normal = mcl_mapgen.flat, mcl_mapgen.superflat, mcl_mapgen.singlenode, mcl_mapgen.normal
minetest_log("action", "[mcl_mapgen] Mapgen mode: " .. (normal and "normal" or (superflat and "superflat" or (flat and "flat" or "singlenode"))))
-------------------------------------------------------------------------------------------------------------------------------------------------
-- Generator queues
local queue_unsafe_engine = {}
local queue_chunks_nodes = {}
local queue_chunks_lvm = {}
local queue_blocks_nodes = {}
local queue_blocks_lvm = {}
-- Requirements. 0 means 'none', greater than 0 means 'required'
local block = 0
local queue_blocks_lvm_counter = 0
local lvm_chunk = 0
local param2 = 0
local nodes_block = 0
local nodes_chunk = 0
local safe_functions = 0
local BS, CS = mcl_mapgen.BS, mcl_mapgen.CS -- Mapblock size (in nodes), Mapchunk size (in blocks)
local offset = mcl_mapgen.OFFSET -- Central mapchunk offset (in blocks)
local CS_NODES = mcl_mapgen.CS_NODES
local LAST_BLOCK = mcl_mapgen.LAST_BLOCK
local LAST_NODE_IN_BLOCK = mcl_mapgen.LAST_NODE_IN_BLOCK
local LAST_NODE_IN_CHUNK = mcl_mapgen.LAST_NODE_IN_CHUNK
local HALF_CS_NODES = mcl_mapgen.HALF_CS_NODES
local CS_3D = mcl_mapgen.CS_3D
local CHUNK_WITH_SHELL = mcl_mapgen.CHUNK_WITH_SHELL
local CHUNK_WITH_SHELL_3D = mcl_mapgen.CHUNK_WITH_SHELL_3D
local DEFAULT_ORDER = order.DEFAULT
function mcl_mapgen.register_on_generated(callback_function, order)
queue_unsafe_engine[#queue_unsafe_engine+1] = {i = order or DEFAULT_ORDER, f = callback_function}
table.sort(queue_unsafe_engine, function(a, b) return (a.i <= b.i) end)
end
function mcl_mapgen.register_mapgen(callback_function, order)
nodes_chunk = nodes_chunk + 1
safe_functions = safe_functions + 1
queue_chunks_nodes[nodes_chunk] = {i = order or DEFAULT_ORDER, f = callback_function}
table.sort(queue_chunks_nodes, function(a, b) return (a.i <= b.i) end)
end
function mcl_mapgen.register_mapgen_lvm(callback_function, order)
lvm_chunk = lvm_chunk + 1
safe_functions = safe_functions + 1
queue_chunks_lvm[lvm_chunk] = {i = order or DEFAULT_ORDER, f = callback_function}
table.sort(queue_chunks_lvm, function(a, b) return (a.i <= b.i) end)
end
function mcl_mapgen.register_mapgen_block(callback_function, order)
block = block + 1
nodes_block = nodes_block + 1
safe_functions = safe_functions + 1
queue_blocks_nodes[nodes_block] = {i = order or DEFAULT_ORDER, f = callback_function}
table.sort(queue_blocks_nodes, function(a, b) return (a.i <= b.i) end)
end
function mcl_mapgen.register_mapgen_block_lvm(callback_function, order)
block = block + 1
queue_blocks_lvm_counter = queue_blocks_lvm_counter + 1
safe_functions = safe_functions + 1
queue_blocks_lvm[queue_blocks_lvm_counter] = {order = order or DEFAULT_ORDER, callback_function = callback_function}
table.sort(queue_blocks_lvm, function(a, b) return (a.order <= b.order) end)
end
local vm_context -- here will be many references and flags, like: param2, light_data, heightmap, biomemap, heatmap, humiditymap, gennotify, write_lvm, write_param2, shadow
local data, param2_data, light, area
local lvm_buffer, lvm_param2_buffer, lvm_light_buffer = {}, {}, {} -- Static buffer pointers
local all_blocks_in_chunk = {}
for x = -1, LAST_BLOCK+1 do
for y = -1, LAST_BLOCK+1 do
for z = -1, LAST_BLOCK+1 do
all_blocks_in_chunk[CHUNK_WITH_SHELL * (CHUNK_WITH_SHELL * y + z) + x] = vector.new(x, y, z)
end
end
end
local chunk_scan_range = {
[-CS_NODES] = {-1 , -1 },
[ 0 ] = {-1 , LAST_BLOCK+1},
[ CS_NODES] = {LAST_BLOCK+1, LAST_BLOCK+1},
}
local EDGE_MIN = mcl_mapgen.EDGE_MIN
local EDGE_MAX = mcl_mapgen.EDGE_MAX
local function is_chunk_finished(minp)
local center_x = minp.x + HALF_CS_NODES
local center_y = minp.y + HALF_CS_NODES
local center_z = minp.z + HALF_CS_NODES
local from_x = center_x - CS_NODES
local from_y = center_y - CS_NODES
local from_z = center_z - CS_NODES
local to_x = center_x + CS_NODES
local to_y = center_y + CS_NODES
local to_z = center_z + CS_NODES
if from_x < EDGE_MIN then from_x = center_x end
if from_y < EDGE_MIN then from_y = center_y end
if from_z < EDGE_MIN then from_z = center_z end
if to_x > EDGE_MAX then to_x = center_x end
if to_y > EDGE_MAX then to_y = center_y end
if to_z > EDGE_MAX then to_z = center_z end
for check_x = from_x, to_x, CS_NODES do
local are_we_in_central_chunk = check_x == center_x
for check_y = from_y, to_y, CS_NODES do
are_we_in_central_chunk = are_we_in_central_chunk and (check_y == center_y)
for check_z = from_z, to_z, CS_NODES do
are_we_in_central_chunk = are_we_in_central_chunk and (check_z == center_z)
if not are_we_in_central_chunk then
local check_pos = {x = check_x, y = check_y, z = check_z}
minetest_get_voxel_manip():read_from_map(check_pos, check_pos)
local node = minetest_get_node(check_pos)
if node.name == "ignore" then
-- return nil, means false, means, there is something to generate still,
-- (because one of adjacent chunks is unfinished - "ignore" means that),
-- means this chunk will be changed, at least one of its sides or corners
-- means it's unsafe to place anything there right now, it might disappar,
-- better to wait, see the diagram of conflict/ok areas per a single axis:
-- conflict| ok |conflict|conflict| ok |conflict|conflict| ok |conflict
-- (_________Chunk1_________)|(_________Chunk2_________)|(_________Chunk3_________)
-- [Block1]|[MidBlk]|[BlockN]|[Block1]|[MidBlk]|[BlockN]|[Block1]|[MidBlk]|[BlockN]
-- \_____________Chunk2-with-shell____________/
-- ...______Chunk1-with-shell________/ \________Chunk3-with-shell______...
-- Generation of chunk 1 AFFECTS 2 ^^^ ^^^ Generation of chunk 3 affects 2
-- ^^^^^^^^Chunk 2 gen. affects 1 and 3^^^^^^^^
return
end
end
end
end
end
return true
end
local function uint32_t(v)
if v >= 0 then
return v % 0x100000000
end
return 0x100000000 - (math.abs(v) % 0x100000000)
end
local function get_block_seed(pos, current_seed)
local current_seed = current_seed or uint32_t(tonumber(seed))
return uint32_t(uint32_t(23 * pos.x) + uint32_t(42123 * pos.y) + uint32_t(38134234 * pos.z) + current_seed)
end
local function get_block_seed2(pos, current_seed)
local current_seed = current_seed or uint32_t(tonumber(seed))
local n = uint32_t(uint32_t(1619 * pos.x) + uint32_t(31337 * pos.y) + uint32_t(52591 * pos.z) + uint32_t(1013 * current_seed))
n = bit.bxor(bit.rshift(n, 13), n)
local seed = uint32_t((n * uint32_t(n * n * 60493 + 19990303) + 1376312589))
return seed
end
local function get_block_seed3(pos, current_seed)
local current_seed = uint32_t(current_seed or uint32_t(tonumber(seed)))
local x = uint32_t((pos.x + 32768) * 13)
local y = uint32_t((pos.y + 32767) * 13873)
local z = uint32_t((pos.z + 76705) * 115249)
local seed = uint32_t(bit.bxor(current_seed, x, y, z))
return seed
end
minetest.register_on_generated(function(minp, maxp, chunkseed)
local minp, maxp, chunkseed = minp, maxp, chunkseed
local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
data = vm:get_data(lvm_buffer)
area = VoxelArea:new({MinEdge=emin, MaxEdge=emax})
vm_context = {
data = data,
param2_data = param2_data,
light = light,
area = area,
lvm_buffer = lvm_buffer,
lvm_param2_buffer = lvm_param2_buffer,
lvm_light_buffer = lvm_light_buffer,
vm = vm,
emin = emin,
emax = emax,
minp = minp,
maxp = maxp,
chunkseed = chunkseed,
}
local current_blocks = {}
local current_chunks = {}
if safe_functions > 0 then
local ready_blocks = table.copy(all_blocks_in_chunk)
local p0 = vector.new(minp)
local center = vector.add(p0, HALF_CS_NODES)
for x = -CS_NODES, CS_NODES, CS_NODES do
for y = -CS_NODES, CS_NODES, CS_NODES do
for z = -CS_NODES, CS_NODES, CS_NODES do
if x ~= 0 or y ~= 0 or z ~= 0 then
local offset = vector.new(x, y, z)
local pos = center + offset
minetest_get_voxel_manip():read_from_map(pos, pos)
local node = minetest_get_node(pos)
local is_generated = node.name ~= "ignore"
if is_generated then
local adjacent_chunk_pos = p0 + offset
if is_chunk_finished(adjacent_chunk_pos) then
current_chunks[#current_chunks + 1] = adjacent_chunk_pos
end
else
local scan_range_x = chunk_scan_range[x]
for cut_x = scan_range_x[1], scan_range_x[2] do
local scan_range_y = chunk_scan_range[y]
for cut_y = scan_range_y[1], scan_range_y[2] do
local scan_range_z = chunk_scan_range[z]
for cut_z = scan_range_z[1], scan_range_z[2] do
ready_blocks[CHUNK_WITH_SHELL * (CHUNK_WITH_SHELL * cut_y + cut_z) + cut_x] = nil
end
end
end
end
end
end
end
end
local number_of_blocks = 0
for k, offset in pairs(ready_blocks) do
if queue_blocks_lvm_counter > 0 or nodes_block > 0 then
local block_minp = p0 + vector.multiply(offset, BS)
local block_maxp = vector.add(block_minp, LAST_NODE_IN_BLOCK)
local blockseed = get_block_seed3(block_minp)
vm_context.minp, vm_context.maxp, vm_context.blockseed = block_minp, block_maxp, blockseed
-- --
-- mcl_mapgen.register_mapgen_block_lvm(function(vm_context), order_number) --
-- --
for _, v in pairs(queue_blocks_lvm) do
v.callback_function(vm_context)
end
if nodes_block > 0 then
current_blocks[#current_blocks + 1] = { minp = block_minp, maxp = block_maxp, blockseed = blockseed }
end
end
number_of_blocks = number_of_blocks + 1
end
if number_of_blocks == CHUNK_WITH_SHELL_3D then
current_chunks[#current_chunks + 1] = p0
end
end
if #queue_unsafe_engine > 0 then
vm_context.minp, vm_context.maxp = minp, maxp
-- * U N S A F E --
-- mcl_mapgen.register_on_generated(function(vm_context), order_number) --
-- * U N S A F E --
for _, v in pairs(queue_unsafe_engine) do
v.f(vm_context)
end
if vm_context.write then
vm:set_data(data)
end
if vm_context.write_param2 then
vm:set_param2_data(vm_context.param2_data)
end
if vm_context.write_light then
vm:set_light_data(light)
end
if vm_context.write or vm_context.write_param2 or vm_context.write_light then
vm:calc_lighting(minp, maxp, (vm_context.shadow ~= nil) or true)
vm:write_to_map()
vm:update_liquids()
elseif vm_context.calc_lighting then
vm:calc_lighting(minp, maxp, (vm_context.shadow ~= nil) or true)
end
end
for i, chunk_minp in pairs(current_chunks) do
local chunk_maxp = vector.add(chunk_minp, LAST_NODE_IN_CHUNK)
local current_chunk_seed = get_block_seed3(vector.subtract(chunk_minp, BS))
area = VoxelArea:new({MinEdge=minp, MaxEdge=maxp})
vm_context = {
data = data,
param2_data = param2_data,
light = light,
area = area,
lvm_buffer = lvm_buffer,
lvm_param2_buffer = lvm_param2_buffer,
lvm_light_buffer = lvm_light_buffer,
emin = chunk_minp,
emax = chunk_maxp,
minp = chunk_minp,
maxp = chunk_maxp,
chunkseed = current_chunk_seed,
}
-- --
-- mcl_mapgen.register_mapgen_lvm(function(vm_context), order_number) --
-- --
for _, v in pairs(queue_chunks_lvm) do
v.f(vm_context)
end
-- --
-- mcl_mapgen.register_mapgen(function(minp, maxp, chunkseed, vm_context), order_number) --
-- --
for _, v in pairs(queue_chunks_nodes) do
v.f(chunk_minp, chunk_maxp, current_chunk_seed, vm_context)
end
if vm_context.write or vm_context.write_param2 or vm_context.write_light then
if vm_context.write then
vm:set_data(data)
end
if vm_context.write_param2 then
vm:set_param2_data(param2_data)
end
if vm_context.write_light then
vm:set_light_data(light)
end
-- caused error from torches (?)
-- vm:calc_lighting(minp, maxp, vm_context.shadow or true)
vm:write_to_map()
vm:update_liquids()
elseif vm_context.calc_lighting then
vm:calc_lighting(minp, maxp, (vm_context.shadow ~= nil) or true)
end
end
for _, b in pairs(current_blocks) do
-- --
-- mcl_mapgen.register_mapgen_block(function(minp, maxp, blockseed), order_number) --
-- --
for _, v in pairs(queue_blocks_nodes) do
v.f(b.minp, b.maxp, b.blockseed)
end
end
end)
minetest.register_on_generated = mcl_mapgen.register_chunk_generator
function mcl_mapgen.get_far_node(p)
local p = p
local node = minetest_get_node(p)
if node.name ~= "ignore" then return node end
minetest_get_voxel_manip():read_from_map(p, p)
return minetest_get_node(p)
end
local function coordinate_to_block(x)
return math_floor(x / BS)
end
local function coordinate_to_chunk(x)
return math_floor((coordinate_to_block(x) - offset) / CS)
end
function mcl_mapgen.pos_to_block(pos)
return {
x = coordinate_to_block(pos.x),
y = coordinate_to_block(pos.y),
z = coordinate_to_block(pos.z)
}
end
function mcl_mapgen.pos_to_chunk(pos)
return {
x = coordinate_to_chunk(pos.x),
y = coordinate_to_chunk(pos.y),
z = coordinate_to_chunk(pos.z)
}
end
local k_positive = math.ceil(mcl_mapgen.MAX_LIMIT / mcl_mapgen.CS_NODES)
local k_positive_z = k_positive * 2
local k_positive_y = k_positive_z * k_positive_z
function mcl_mapgen.get_chunk_number(pos) -- unsigned int
local c = mcl_mapgen.pos_to_chunk(pos)
return
(c.y + k_positive) * k_positive_y +
(c.z + k_positive) * k_positive_z +
c.x + k_positive
end
mcl_mapgen.minecraft_height_limit = 256
mcl_mapgen.bedrock_is_rough = normal
-- Overworld
overworld.min = -62
if superflat then
mcl_mapgen.ground = tonumber(minetest.get_mapgen_setting("mgflat_ground_level")) or 8
overworld.min = mcl_mapgen.ground - 3
end
-- if singlenode then mcl_mapgen.overworld.min = -66 end -- DONT KNOW WHY
overworld.max = mcl_mapgen.EDGE_MAX
overworld.bedrock_min = overworld.min
overworld.bedrock_max = overworld.bedrock_min + (mcl_mapgen.bedrock_is_rough and 4 or 0)
mcl_mapgen.lava = normal
overworld.lava_max = overworld.min + (normal and 10 or 0)
-- The Nether (around Y = -29000)
nether.min = -29067 -- Carefully chosen to be at a mapchunk border
nether.max = nether.min + 128
nether.bedrock_bottom_min = nether.min
nether.bedrock_top_max = nether.max
if not superflat then
nether.bedrock_bottom_max = nether.bedrock_bottom_min + 4
nether.bedrock_top_min = nether.bedrock_top_max - 4
nether.lava_max = nether.min + 31
else
-- Thin bedrock in classic superflat mapgen
nether.bedrock_bottom_max = nether.bedrock_bottom_min
nether.bedrock_top_min = nether.bedrock_top_max
nether.lava_max = nether.min + 2
end
if superflat then
nether.flat_floor = nether.bedrock_bottom_max + 4
nether.flat_ceiling = nether.bedrock_bottom_max + 52
elseif flat then
nether.flat_floor = nether.lava_max + 4
nether.flat_ceiling = nether.lava_max + 52
end
-- The End (surface at ca. Y = -27000)
end_.min = -27073 -- Carefully chosen to be at a mapchunk border
end_.max = overworld.min - 2000
end_.platform_pos = { x = 100, y = end_.min + 74, z = 0 }
-- Realm barrier used to safely separate the End from the void below the Overworld
mcl_mapgen.realm_barrier_overworld_end_max = end_.max
mcl_mapgen.realm_barrier_overworld_end_min = end_.max - 11
-- Use MineClone 2-style dungeons for normal mapgen
mcl_mapgen.dungeons = normal
mcl_mapgen.overworld = overworld
mcl_mapgen.end_ = end_
mcl_mapgen["end"] = mcl_mapgen.end_
mcl_mapgen.nether = nether
mcl_mapgen.order = order
function mcl_mapgen.get_voxel_manip(vm_context)
if vm_context.vm then
return vm
end
vm_context.vm = minetest.get_voxel_manip(vm_context.emin, vm_context.emax)
vm_context.emin, vm_context.emax = vm_context.vm:read_from_map(vm_context.emin, vm_context.emax)
vm_context.area = VoxelArea:new({MinEdge=vm_context.emin, MaxEdge=vm_context.emax})
return vm_context.vm
end
function mcl_mapgen.clamp_to_chunk(x, size)
if not size then
minetest.log("warning", "[mcl_mapgen] Couldn't clamp " .. tostring(x) .. " - missing size")
return x
end
if size > CS_NODES then
minetest.log("warning", "[mcl_mapgen] Couldn't clamp " .. tostring(x) .. " - given size " .. tostring(size) .. " greater than chunk size " .. tostring(mcl_mapgen.CS_NODES))
return x
end
local offset_in_chunk = (x + central_chunk_min_pos) % CS_NODES
local x2_in_chunk = offset_in_chunk + size
if x2_in_chunk <= CS_NODES then
return x
end
local overflow = x2_in_chunk - CS_NODES
if overflow > size / 2 then
local next_x = x + (size - overflow)
if next_x < mcl_mapgen.EDGE_MAX then
return next_x
end
end
return x - overflow
end
function mcl_mapgen.get_chunk_beginning(x)
if tonumber(x) then
return x - ((x + central_chunk_min_pos) % CS_NODES)
end
if x.x then
return {
x = mcl_mapgen.get_chunk_beginning(x.x),
y = mcl_mapgen.get_chunk_beginning(x.y),
z = mcl_mapgen.get_chunk_beginning(x.z)
}
end
end
function mcl_mapgen.get_chunk_ending(x)
if tonumber(x) then
return mcl_mapgen.get_chunk_beginning(x) + LAST_NODE_IN_CHUNK
end
if x.x then
return {
x = mcl_mapgen.get_chunk_beginning(x.x) + LAST_NODE_IN_CHUNK,
y = mcl_mapgen.get_chunk_beginning(x.y) + LAST_NODE_IN_CHUNK,
z = mcl_mapgen.get_chunk_beginning(x.z) + LAST_NODE_IN_CHUNK
}
end
end
mcl_mapgen.get_block_seed = get_block_seed
mcl_mapgen.get_block_seed2 = get_block_seed2
mcl_mapgen.get_block_seed3 = get_block_seed3
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