Fork du dépôt watershed. https://github.com/paramat/watershed.git
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-- Parameters
local SINGLENODE = true -- Use singlenode mapgen and spawnplayer function
local YMIN = -33000 -- Approximate base of realm stone
local YMAX = 33000 -- Approximate top of atmosphere / mountains / floatlands
local TERCEN = -128 -- Terrain zero level, average seabed
local YWAT = 1 -- Sea surface y
local YSAV = 5 -- Average sandline y, dune grasses above this
local SAMP = 3 -- Sandline amplitude
local YCLOMIN = 207 -- Minimum height of mod clouds
local CLOUDS = true -- Mod clouds?
local TERSCA = 512 -- Vertical terrain scale
local XLSAMP = 0.1 -- Extra large scale height variation amplitude
local BASAMP = 0.3 -- Base terrain amplitude
local MIDAMP = 0.1 -- Mid terrain amplitude
local CANAMP = 0.4 -- Canyon terrain maximum amplitude
local ATANAMP = 1.1 -- Arctan function amplitude,
-- smaller = more and larger floatlands above ridges
local BLENEXP = 2 -- Terrain blend exponent
local TSTONE = 0.02 -- Density threshold for stone, depth of soil at TERCEN
local TRIVER = -0.028 -- Densitybase threshold for river surface
local TRSAND = -0.035 -- Densitybase threshold for river sand
local TSTREAM = -0.004 -- Densitymid threshold for stream surface
local TSSAND = -0.005 -- Densitymid threshold for stream sand
local TLAVA = 2 -- Maximum densitybase threshold for lava,
-- small because grad is non-linear
local TFIS = 0.01 -- Fissure threshold, controls width
local TSEAM = 0.2 -- Seam threshold, width of seams
local ORESCA = 512 -- Seam system vertical scale
local ORETHI = 0.002 -- Ore seam thickness tuner
local BERGDEP = 32 -- Maximum iceberg depth
local TFOG = -0.04 -- Fog top densitymid threshold
local biomeparams = {
HITET = 0.35, -- High temperature threshold
LOTET = -0.35, -- Low ..
ICETET = -0.7, -- Ice ..
HIHUT = 0.35, -- High humidity threshold
LOHUT = -0.35, -- Low ..
FOGHUT = 1.0, -- Fog ..
BLEND = 0.02, -- Biome blend randomness
}
local flora = {
PINCHA = 36, -- Pine tree 1/x chance per node
APTCHA = 36, -- Appletree
FLOCHA = 289, -- Flower
GRACHA = 36, -- Grassland grasses
JUTCHA = 16, -- Jungletree
JUGCHA = 16, -- Junglegrass
CACCHA = 2209, -- Cactus
DRYCHA = 121, -- Dry shrub
ACACHA = 1369, -- Acacia tree
GOGCHA = 9, -- Golden grass
PAPCHA = 4, -- Papyrus
DUGCHA = 16, -- Dune grass
}
-- 3D noises
-- 3D noise for terrain
local np_terrain = {
offset = 0,
scale = 1,
spread = {x = 384, y = 192, z = 384},
seed = 593,
octaves = 5,
persist = 0.67
}
-- 3D noise for fissures
local np_fissure = {
offset = 0,
scale = 1,
spread = {x = 256, y = 512, z = 256},
seed = 20099,
octaves = 5,
persist = 0.5
}
-- 3D noise for temperature
local np_temp = {
offset = 0,
scale = 1,
spread = {x = 1024, y = 1024, z = 1024},
seed = 9130,
octaves = 3,
persist = 0.5
}
-- 3D noise for humidity
local np_humid = {
offset = 0,
scale = 1,
spread = {x = 1024, y = 1024, z = 1024},
seed = -55500,
octaves = 3,
persist = 0.5
}
-- 3D noise for ore seam networks
local np_seam = {
offset = 0,
scale = 1,
spread = {x = 512, y = 512, z = 512},
seed = -992221,
octaves = 2,
persist = 0.5
}
-- 3D noise for rock strata inclination
local np_strata = {
offset = 0,
scale = 1,
spread = {x = 512, y = 512, z = 512},
seed = 92219,
octaves = 3,
persist = 0.5
}
-- 2D noises
-- 2D noise for mid terrain / streambed height
local np_mid = {
offset = 0,
scale = 1,
spread = {x = 768, y = 768, z = 768},
seed = 85546,
octaves = 5,
persist = 0.5
}
-- 2D noise for base terrain / riverbed height
local np_base = {
offset = 0,
scale = 1,
spread = {x = 4096, y = 4096, z = 4096},
seed = 8890,
octaves = 3,
persist = 0.33
}
-- 2D noise for extra large scale height variation
local np_xlscale = {
offset = 0,
scale = 1,
spread = {x = 8192, y = 8192, z = 8192},
seed = -72,
octaves = 3,
persist = 0.33
}
-- 2D noise for magma surface
local np_magma = {
offset = 0,
scale = 1,
spread = {x = 128, y = 128, z = 128},
seed = -13,
octaves = 2,
persist = 0.5
}
-- Do files
dofile(minetest.get_modpath("watershed") .. "/nodes.lua")
dofile(minetest.get_modpath("watershed") .. "/functions.lua")
-- Initialize 3D and 2D noise objects to nil
local nobj_terrain = nil
local nobj_fissure = nil
local nobj_temp = nil
local nobj_humid = nil
local nobj_seam = nil
local nobj_strata = nil
local nobj_mid = nil
local nobj_base = nil
local nobj_xlscale = nil
local nobj_magma = nil
-- Localise noise buffers
local nbuf_terrain = {}
local nbuf_fissure = {}
local nbuf_temp = {}
local nbuf_humid = {}
local nbuf_seam = {}
local nbuf_strata = {}
local nbuf_mid = {}
local nbuf_base = {}
local nbuf_xlscale = {}
local nbuf_magma = {}
-- Localise data buffer
local dbuf = {}
-- Mapchunk generation function
function watershed_chunkgen(x0, y0, z0, x1, y1, z1, area, data)
local c_air = minetest.get_content_id("air")
local c_ignore = minetest.get_content_id("ignore")
local c_water = minetest.get_content_id("default:water_source")
local c_sand = minetest.get_content_id("default:sand")
local c_desand = minetest.get_content_id("default:desert_sand")
local c_snowblock = minetest.get_content_id("default:snowblock")
local c_ice = minetest.get_content_id("default:ice")
local c_dirtsnow = minetest.get_content_id("default:dirt_with_snow")
local c_jungrass = minetest.get_content_id("default:junglegrass")
local c_dryshrub = minetest.get_content_id("default:dry_shrub")
local c_danwhi = minetest.get_content_id("flowers:dandelion_white")
local c_danyel = minetest.get_content_id("flowers:dandelion_yellow")
local c_rose = minetest.get_content_id("flowers:rose")
local c_tulip = minetest.get_content_id("flowers:tulip")
local c_geranium = minetest.get_content_id("flowers:geranium")
local c_viola = minetest.get_content_id("flowers:viola")
local c_stodiam = minetest.get_content_id("default:stone_with_diamond")
local c_mese = minetest.get_content_id("default:mese")
local c_stogold = minetest.get_content_id("default:stone_with_gold")
local c_stocopp = minetest.get_content_id("default:stone_with_copper")
local c_stoiron = minetest.get_content_id("default:stone_with_iron")
local c_stocoal = minetest.get_content_id("default:stone_with_coal")
local c_sandstone = minetest.get_content_id("default:sandstone")
local c_gravel = minetest.get_content_id("default:gravel")
local c_clay = minetest.get_content_id("default:clay")
local c_grass5 = minetest.get_content_id("default:grass_5")
local c_obsidian = minetest.get_content_id("default:obsidian")
local c_wsfreshwater = minetest.get_content_id("watershed:freshwater")
local c_wsmixwater = minetest.get_content_id("watershed:mixwater")
local c_wsstone = minetest.get_content_id("watershed:stone")
local c_wsredstone = minetest.get_content_id("watershed:redstone")
local c_wsgrass = minetest.get_content_id("watershed:grass")
local c_wsdrygrass = minetest.get_content_id("watershed:drygrass")
local c_wsgoldengrass = minetest.get_content_id("watershed:goldengrass")
local c_wsdirt = minetest.get_content_id("watershed:dirt")
local c_wspermafrost = minetest.get_content_id("watershed:permafrost")
local c_wslava = minetest.get_content_id("watershed:lava")
local c_wsfreshice = minetest.get_content_id("watershed:freshice")
local c_wscloud = minetest.get_content_id("watershed:cloud")
local c_wsluxore = minetest.get_content_id("watershed:luxore")
local c_wsicydirt = minetest.get_content_id("watershed:icydirt")
-- perlinmap stuff
local sidelen = x1 - x0 + 1
local chulensxyz = {x = sidelen, y = sidelen + 2, z = sidelen}
local chulensxz = {x = sidelen, y = sidelen, z = 1}
local minposxyz = {x = x0, y = y0 - 1, z = z0}
local minposxz = {x = x0, y = z0}
-- 3D and 2D noise objects created once on first mapchunk generation only
nobj_terrain = nobj_terrain or minetest.get_perlin_map(np_terrain, chulensxyz)
nobj_fissure = nobj_fissure or minetest.get_perlin_map(np_fissure, chulensxyz)
nobj_temp = nobj_temp or minetest.get_perlin_map(np_temp, chulensxyz)
nobj_humid = nobj_humid or minetest.get_perlin_map(np_humid, chulensxyz)
nobj_seam = nobj_seam or minetest.get_perlin_map(np_seam, chulensxyz)
nobj_strata = nobj_strata or minetest.get_perlin_map(np_strata, chulensxyz)
nobj_mid = nobj_mid or minetest.get_perlin_map(np_mid, chulensxz)
nobj_base = nobj_base or minetest.get_perlin_map(np_base, chulensxz)
nobj_xlscale = nobj_xlscale or minetest.get_perlin_map(np_xlscale, chulensxz)
nobj_magma = nobj_magma or minetest.get_perlin_map(np_magma, chulensxz)
-- 3D and 2D perlinmaps created per mapchunk
local nvals_terrain = nobj_terrain:get3dMap_flat(minposxyz, nbuf_terrain)
local nvals_fissure = nobj_fissure:get3dMap_flat(minposxyz, nbuf_fissure)
local nvals_temp = nobj_temp :get3dMap_flat(minposxyz, nbuf_temp)
local nvals_humid = nobj_humid :get3dMap_flat(minposxyz, nbuf_humid)
local nvals_seam = nobj_seam :get3dMap_flat(minposxyz, nbuf_seam)
local nvals_strata = nobj_strata :get3dMap_flat(minposxyz, nbuf_strata)
local nvals_mid = nobj_mid :get2dMap_flat(minposxz, nbuf_mid)
local nvals_base = nobj_base :get2dMap_flat(minposxz, nbuf_base)
local nvals_xlscale = nobj_xlscale:get2dMap_flat(minposxz, nbuf_xlscale)
local nvals_magma = nobj_magma :get2dMap_flat(minposxz, nbuf_magma)
-- ungenerated chunk below?
local viu = area:index(x0, y0 - 1, z0)
local ungen = data[viu] == c_ignore
-- mapgen loop
local nixyz = 1 -- 3D and 2D perlinmap indexes
local nixz = 1
local stable = {} -- stability table of true/false.
-- is node supported from below by 2 stone or nodes on 2 stone?
local under = {} -- biome table.
-- biome number of previous fine material placed in column
for z = z0, z1 do
for y = y0 - 1, y1 + 1 do
local vi = area:index(x0, y, z)
local viu = area:index(x0, y - 1, z)
for x = x0, x1 do
local si = x - x0 + 1 -- stable, under tables index
-- noise values for node
local n_absterrain = math.abs(nvals_terrain[nixyz])
local n_fissure = nvals_fissure[nixyz]
local n_temp = nvals_temp[nixyz]
local n_humid = nvals_humid[nixyz]
local n_seam = nvals_seam[nixyz]
local n_strata = nvals_strata[nixyz]
local n_absmid = math.abs(nvals_mid[nixz])
local n_absbase = math.abs(nvals_base[nixz])
local n_xlscale = nvals_xlscale[nixz]
local n_magma = nvals_magma[nixz]
-- get densities
local n_invbase = (1 - n_absbase)
local terblen = (math.max(n_invbase, 0)) ^ BLENEXP
local grad = math.atan((TERCEN - y) / TERSCA) * ATANAMP
local densitybase = n_invbase * BASAMP + n_xlscale * XLSAMP + grad
local densitymid = n_absmid * MIDAMP + densitybase
local canexp = 0.5 + terblen * 0.5
local canamp = terblen * CANAMP
local density = n_absterrain ^ canexp * canamp * n_absmid + densitymid
-- other values
local triver = TRIVER * n_absbase -- river threshold
local trsand = TRSAND * n_absbase -- river sand
local tstream = TSTREAM * (1 - n_absmid) -- stream threshold
local tssand = TSSAND * (1 - n_absmid) -- stream sand
local tstone = TSTONE * (1 + grad) -- stone threshold
local tlava = TLAVA * (1 - n_magma ^ 4 * terblen ^ 16 * 0.6) -- lava threshold
local ysand = YSAV + n_fissure * SAMP + math.random() * 2 -- sandline
local bergdep = math.abs(n_seam) * BERGDEP -- iceberg depth
local nofis = false -- set fissure bool
if math.abs(n_fissure) >= TFIS then
nofis = true
end
local biome = false -- select biome for node
if n_temp < biomeparams.LOTET +
(math.random() - 0.5) * biomeparams.BLEND then
if n_humid < biomeparams.LOHUT +
(math.random() - 0.5) * biomeparams.BLEND then
biome = 1 -- tundra
elseif n_humid > biomeparams.HIHUT +
(math.random() - 0.5) * biomeparams.BLEND then
biome = 3 -- taiga
else
biome = 2 -- snowy plains
end
elseif n_temp > biomeparams.HITET +
(math.random() - 0.5) * biomeparams.BLEND then
if n_humid < biomeparams.LOHUT +
(math.random() - 0.5) * biomeparams.BLEND then
biome = 7 -- desert
elseif n_humid > biomeparams.HIHUT +
(math.random() - 0.5) * biomeparams.BLEND then
biome = 9 -- rainforest
else
biome = 8 -- savanna
end
else
if n_humid < biomeparams.LOHUT then
biome = 4 -- dry grassland
elseif n_humid > biomeparams.HIHUT then
biome = 6 -- deciduous forest
else
biome = 5 -- grassland
end
end
-- overgeneration and in-chunk generation
if y == y0 - 1 then -- node layer below chunk, initialise tables
under[si] = 0
if ungen then
if nofis and density >= 0 then -- if node solid
stable[si] = 2
else
stable[si] = 0
end
else -- scan top layer of chunk below
local nodid = data[vi]
if nodid == c_wsstone
or nodid == c_wsredstone
or nodid == c_wsdirt
or nodid == c_wspermafrost
or nodid == c_wsluxore
or nodid == c_sand
or nodid == c_desand
or nodid == c_mese
or nodid == c_stodiam
or nodid == c_stogold
or nodid == c_stocopp
or nodid == c_stoiron
or nodid == c_stocoal
or nodid == c_sandstone
or nodid == c_gravel
or nodid == c_clay
or nodid == c_obsidian then
stable[si] = 2
else
stable[si] = 0
end
end
elseif y >= y0 and y <= y1 then -- chunk
-- add nodes and flora
if densitybase >= tlava then -- lava
if densitybase >= 0 then
data[vi] = c_wslava
end
stable[si] = 0
under[si] = 0
elseif densitybase >= tlava - math.min(0.6 + density * 6, 0.6)
and density < tstone then -- obsidian
data[vi] = c_obsidian
stable[si] = 1
under[si] = 0
elseif density >= tstone and nofis -- stone cut by fissures
or (density >= tstone and density < TSTONE * 1.2 and
y <= YWAT) -- stone around water
or (density >= tstone and density < TSTONE * 1.2 and
densitybase >= triver ) -- stone around river
or (density >= tstone and density < TSTONE * 1.2 and
densitymid >= tstream ) then -- stone around stream
local densitystr = n_strata * 0.25 + (TERCEN - y) / ORESCA
-- periodic strata 'density'
local densityper = densitystr - math.floor(densitystr)
if (densityper >= 0.05 and densityper <= 0.09) -- sandstone strata
or (densityper >= 0.25 and densityper <= 0.28)
or (densityper >= 0.45 and densityper <= 0.47)
or (densityper >= 0.74 and densityper <= 0.76)
or (densityper >= 0.77 and densityper <= 0.79)
or (densityper >= 0.84 and densityper <= 0.87)
or (densityper >= 0.95 and densityper <= 0.98) then
data[vi] = c_sandstone
elseif biome == 7 and density < TSTONE * 3 then
-- desert stone as surface layer
data[vi] = c_wsredstone
elseif math.abs(n_seam) < TSEAM then
-- ore seams
if densityper >= 0 and
densityper <= ORETHI * 4 then
data[vi] = c_stocoal
elseif densityper >= 0.3 and
densityper <= 0.3 + ORETHI * 4 then
data[vi] = c_stocoal
elseif densityper >= 0.5 and
densityper <= 0.5 + ORETHI * 4 then
data[vi] = c_stocoal
elseif densityper >= 0.8 and
densityper <= 0.8 + ORETHI * 4 then
data[vi] = c_stocoal
elseif densityper >= 0.55 and
densityper <= 0.55 + ORETHI * 2 then
data[vi] = c_gravel
elseif densityper >= 0.1 and
densityper <= 0.1 + ORETHI * 2 then
data[vi] = c_wsluxore
elseif densityper >= 0.2 and
densityper <= 0.2 + ORETHI * 2 and
math.random(2) == 2 then
data[vi] = c_stoiron
elseif densityper >= 0.65 and
densityper <= 0.65 + ORETHI * 2 and
math.random(2) == 2 then
data[vi] = c_stoiron
elseif densityper >= 0.4 and
densityper <= 0.4 + ORETHI * 2 and
math.random(3) == 2 then
data[vi] = c_stocopp
elseif densityper >= 0.6 and
densityper <= 0.6 + ORETHI and
math.random(5) == 2 then
data[vi] = c_stogold
elseif densityper >= 0.7 and
densityper <= 0.7 + ORETHI and
math.random(7) == 2 then
data[vi] = c_mese
elseif densityper >= 0.9 and
densityper <= 0.9 + ORETHI and
math.random(11) == 2 then
data[vi] = c_stodiam
else
data[vi] = c_wsstone
end
else
data[vi] = c_wsstone
end
stable[si] = stable[si] + 1
under[si] = 0
-- fine materials
elseif density >= 0 and density < tstone and stable[si] >= 2 then
if y == YWAT - 2 and math.abs(n_temp) < 0.05 then -- clay
data[vi] = c_clay
elseif y <= ysand then -- seabed/beach/dune sand not cut by fissures
data[vi] = c_sand
under[si] = 10 -- beach/dunes
elseif densitybase >= trsand + math.random() * 0.001 then -- river sand
data[vi] = c_sand
under[si] = 11 -- riverbank papyrus
elseif densitymid >= tssand + math.random() * 0.001 then -- stream sand
data[vi] = c_sand
under[si] = 0
elseif nofis then -- fine materials cut by fissures
if biome == 1 then
data[vi] = c_wspermafrost
under[si] = 1 -- tundra
elseif biome == 2 then
data[vi] = c_wsdirt
under[si] = 2 -- snowy plains
elseif biome == 3 then
data[vi] = c_wsdirt
under[si] = 3 -- taiga
elseif biome == 4 then
data[vi] = c_wsdirt
under[si] = 4 -- dry grassland
elseif biome == 5 then
data[vi] = c_wsdirt
under[si] = 5 -- grassland
elseif biome == 6 then
data[vi] = c_wsdirt
under[si] = 6 -- forest
elseif biome == 7 then
data[vi] = c_desand
under[si] = 7 -- desert
elseif biome == 8 then
data[vi] = c_wsdirt
under[si] = 8 -- savanna
elseif biome == 9 then
data[vi] = c_wsdirt
under[si] = 9 -- rainforest
end
else -- fissure
stable[si] = 0
under[si] = 0
end
elseif y >= YWAT - bergdep and y <= YWAT + bergdep / 8 -- icesheet
and n_temp < biomeparams.ICETET and density < tstone
and math.abs(n_fissure) > 0.01 then
data[vi] = c_ice
under[si] = 12
stable[si] = 0
elseif y <= YWAT and density < tstone then -- sea water
data[vi] = c_water
under[si] = 0
stable[si] = 0
-- river water not in fissures
elseif densitybase >= triver and density < tstone then
if n_temp < biomeparams.ICETET then
data[vi] = c_wsfreshice
else
if y == YWAT + 1 then
data[vi] = c_wsmixwater
else
data[vi] = c_wsfreshwater
end
end
stable[si] = 0
under[si] = 0
-- stream water not in fissures
elseif densitymid >= tstream and density < tstone then
if n_temp < biomeparams.ICETET then
data[vi] = c_wsfreshice
else
if y == YWAT + 1 then
data[vi] = c_wsmixwater
else
data[vi] = c_wsfreshwater
end
end
stable[si] = 0
under[si] = 0
-- air above surface node
elseif density < 0 and y >= YWAT and under[si] ~= 0 then
local fnoise = n_fissure -- noise for flower colours
if under[si] == 1 then
data[viu] = c_wsicydirt
if math.random(flora.DRYCHA) == 2 then
data[vi] = c_dryshrub
end
elseif under[si] == 2 then
data[viu] = c_dirtsnow
data[vi] = c_snowblock
elseif under[si] == 3 then
if math.random(flora.PINCHA) == 2 then
watershed_pinetree(x, y, z, area, data)
else
data[viu] = c_dirtsnow
data[vi] = c_snowblock
end
elseif under[si] == 4 then
data[viu] = c_wsdrygrass
if math.random(flora.DRYCHA) == 2 then
data[vi] = c_dryshrub
end
elseif under[si] == 5 then
data[viu] = c_wsgrass
if math.random(flora.FLOCHA) == 2 then
watershed_flower(data, vi, fnoise)
elseif math.random(flora.GRACHA) == 2 then
data[vi] = c_grass5
end
elseif under[si] == 6 then
if math.random(flora.APTCHA) == 2 then
watershed_appletree(x, y, z, area, data)
else
data[viu] = c_wsgrass
if math.random(flora.FLOCHA) == 2 then
watershed_flower(data, vi, fnoise)
elseif math.random(flora.GRACHA) == 2 then
data[vi] = c_grass5
end
end
elseif under[si] == 7 and n_temp < biomeparams.HITET + 0.1 then
if math.random(flora.CACCHA) == 2 then
watershed_cactus(x, y, z, area, data)
elseif math.random(flora.DRYCHA) == 2 then
data[vi] = c_dryshrub
end
elseif under[si] == 8 then
if math.random(flora.ACACHA) == 2 then
watershed_acaciatree(x, y, z, area, data)
else
data[viu] = c_wsdrygrass
if math.random(flora.GOGCHA) == 2 then
data[vi] = c_wsgoldengrass
end
end
elseif under[si] == 9 then
if math.random(flora.JUTCHA) == 2 then
watershed_jungletree(x, y, z, area, data)
else
data[viu] = c_wsgrass
if math.random(flora.JUGCHA) == 2 then
data[vi] = c_jungrass
end
end
elseif under[si] == 10 then -- dunes
if math.random(flora.DUGCHA) == 2 and y > YSAV
and biome >= 4 then
data[vi] = c_wsgoldengrass
end
elseif under[si] == 11 and n_temp > biomeparams.HITET then -- hot biome riverbank
if math.random(flora.PAPCHA) == 2 then
watershed_papyrus(x, y, z, area, data)
end
-- snowy iceberg
elseif under[si] == 12 and n_humid > biomeparams.LOHUT +
(math.random() - 0.5) * biomeparams.BLEND then
data[vi] = c_snowblock
end
stable[si] = 0
under[si] = 0
elseif density < 0 and densitymid > TFOG and
n_humid > biomeparams.FOGHUT then -- fog
data[vi] = c_wscloud
stable[si] = 0
under[si] = 0
elseif density < 0 and CLOUDS and y == y1 and y >= YCLOMIN then -- clouds
local xrq = 16 * math.floor((x - x0) / 16) -- quantise to 16x16 lattice
local zrq = 16 * math.floor((z - z0) / 16)
local yrq = 79
local qixyz = zrq * 6400 + yrq * 80 + xrq + 1 -- quantised 3D index
if math.abs(nvals_fissure[qixyz]) < nvals_humid[qixyz] * 0.1 then
data[vi] = c_wscloud
end
stable[si] = 0
under[si] = 0
else -- air
stable[si] = 0
under[si] = 0
end
elseif y == y1 + 1 then -- plane of nodes above chunk
-- if air above fine materials
if density < 0 and y >= YWAT and under[si] ~= 0 then
if under[si] == 1 then -- add surface nodes to chunk top layer
data[viu] = c_wsicydirt
elseif under[si] == 2 then
data[viu] = c_dirtsnow
data[vi] = c_snowblock -- snowblocks in chunk above
elseif under[si] == 3 then
data[viu] = c_dirtsnow
data[vi] = c_snowblock
elseif under[si] == 4 then
data[viu] = c_wsdrygrass
elseif under[si] == 5 then
data[viu] = c_wsgrass
elseif under[si] == 6 then
data[viu] = c_wsgrass
elseif under[si] == 8 then
data[viu] = c_wsdrygrass
elseif under[si] == 9 then
data[viu] = c_wsgrass
end
end
end
nixyz = nixyz + 1
nixz = nixz + 1
vi = vi + 1
viu = viu + 1
end
nixz = nixz - sidelen
end
nixz = nixz + sidelen
end
end
-- Regenerate chunk by chat command. Dependant on chunksize = 5.
minetest.register_chatcommand("regen",{
description = "Regenerate player's current mapchunk",
privs = {server = true, rollback = true},
func = function(name, params)
local t1 = os.clock()
local player = minetest.get_player_by_name(name)
local pos = player:getpos()
local plax = math.floor(pos.x + 0.5)
local play = math.floor(pos.y + 0.5)
local plaz = math.floor(pos.z + 0.5)
local x0 = (80 * math.floor((plax + 32) / 80)) - 32
local y0 = (80 * math.floor((play + 32) / 80)) - 32
local z0 = (80 * math.floor((plaz + 32) / 80)) - 32
local x1 = x0 + 79
local y1 = y0 + 79
local z1 = z0 + 79
if y0 < YMIN or y1 > YMAX then
return
end
print ("[watershed] regenerate mapchunk")
local vm = minetest.get_voxel_manip()
local pos1 = {x = x0, y = y0 - 1, z = z0}
local pos2 = {x = x1, y = y1 + 1, z = z1}
local emin, emax = vm:read_from_map(pos1, pos2)
local area = VoxelArea:new({MinEdge = emin, MaxEdge = emax})
local data = vm:get_data(dbuf)
watershed_chunkgen(x0, y0, z0, x1, y1, z1, area, data)
vm:set_data(data)
vm:write_to_map()
vm:update_map()
local chugent = math.ceil((os.clock() - t1) * 1000)
print ("[watershed] " .. chugent .. " ms")
end
})
-- On generated function
minetest.register_on_generated(function(minp, maxp, seed)
if minp.y < YMIN or maxp.y > YMAX then
return
end
local t1 = os.clock()
local x1 = maxp.x
local y1 = maxp.y
local z1 = maxp.z
local x0 = minp.x
local y0 = minp.y
local z0 = minp.z
local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
local area = VoxelArea:new{MinEdge = emin, MaxEdge = emax}
local data = vm:get_data(dbuf)
watershed_chunkgen(x0, y0, z0, x1, y1, z1, area, data)
vm:set_data(data)
if not SINGLENODE then
vm:set_lighting({day = 0, night = 0}) -- remove incorrect precalculated light
end
vm:calc_lighting()
vm:write_to_map(data)
vm:update_liquids()
local chugent = math.ceil((os.clock() - t1) * 1000)
print ("[watershed] " .. chugent .. " ms")
end)
-- Singlenode option
if SINGLENODE then
-- Set mapgen parameters
minetest.set_mapgen_params({mgname = "singlenode", flags = "nolight"})
-- Spawn player function. Requires chunksize = 80 nodes (the default)
function spawnplayer(player)
local xsp
local ysp
local zsp
local nobj_terrain = nil
local nobj_mid = nil
local nobj_base = nil
local nobj_xlscale = nil
local nbuf_terrain
local nbuf_mid
local nbuf_base
local nbuf_xlscale
for chunk = 1, 128 do
print ("[watershed] searching for spawn "..chunk)
local x0 = 80 * math.random(-32, 32) - 32
local z0 = 80 * math.random(-32, 32) - 32
local y0 = -32
local x1 = x0 + 79
local z1 = z0 + 79
local y1 = 47
local sidelen = 80
local chulensxyz = {x = sidelen, y = sidelen + 2, z = sidelen}
local chulensxz = {x = sidelen, y = sidelen, z = 1}
local minposxyz = {x = x0, y = y0 - 1, z = z0}
local minposxz = {x = x0, y = z0}
nobj_terrain = nobj_terrain or minetest.get_perlin_map(np_terrain, chulensxyz)
nobj_mid = nobj_mid or minetest.get_perlin_map(np_mid, chulensxz)
nobj_base = nobj_base or minetest.get_perlin_map(np_base, chulensxz)
nobj_xlscale = nobj_xlscale or minetest.get_perlin_map(np_xlscale, chulensxz)
local nvals_terrain = nobj_terrain:get3dMap_flat(minposxyz, nbuf_terrain)
local nvals_mid = nobj_mid :get2dMap_flat(minposxz, nbuf_mid)
local nvals_base = nobj_base :get2dMap_flat(minposxz, nbuf_base)
local nvals_xlscale = nobj_xlscale:get2dMap_flat(minposxz, nbuf_xlscale)
local nixz = 1
local nixyz = 1
for z = z0, z1 do
for y = y0, y1 do
for x = x0, x1 do
local n_absterrain = math.abs(nvals_terrain[nixyz])
local n_absmid = math.abs(nvals_mid[nixz])
local n_absbase = math.abs(nvals_base[nixz])
local n_xlscale = nvals_xlscale[nixz]
local n_invbase = (1 - n_absbase)
local terblen = (math.max(n_invbase, 0)) ^ BLENEXP
local grad = math.atan((TERCEN - y) / TERSCA) * ATANAMP
local densitybase = n_invbase * BASAMP + n_xlscale * XLSAMP +
grad
local densitymid = n_absmid * MIDAMP + densitybase
local canexp = 0.5 + terblen * 0.5
local canamp = terblen * CANAMP
local density = n_absterrain ^ canexp * canamp * n_absmid +
densitymid
if y >= 1 and density > -0.005 and density < 0 then
ysp = y + 1
xsp = x
zsp = z
break
end
nixz = nixz + 1
nixyz = nixyz + 1
end
if ysp then
break
end
nixz = nixz - 80
end
if ysp then
break
end
nixz = nixz + 80
end
if ysp then
break
end
end
print ("[watershed] spawn player (" .. xsp .. " " .. ysp .. " " .. zsp .. ")")
player:setpos({x = xsp, y = ysp, z = zsp})
end
minetest.register_on_newplayer(function(player)
spawnplayer(player)
end)
minetest.register_on_respawnplayer(function(player)
spawnplayer(player)
return true
end)
end