Soil depth table > tree roots. Dirt/sand on floatlands. math.abs() 'planetlike' 3D biomes
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paramat
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@ -1,4 +1,4 @@
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watershed 0.2.3 by paramat
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watershed 0.2.4 by paramat
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For latest stable Minetest back to 0.4.8
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Depends default
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Licenses: code WTFPL
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130
init.lua
130
init.lua
@ -1,11 +1,12 @@
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-- watershed 0.2.3 by paramat
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-- watershed 0.2.4 by paramat
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-- For latest stable Minetest and back to 0.4.8
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-- Depends default
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-- License: code WTFPL
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-- 0.2.3 clouds, cacti, ice, papyrus, dry shrubs
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-- savanna with acacias, dry grass surface nodes and golden grass
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-- arctan density gradient for floatlands and caves
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-- 0.2.4 soil depth table must meet depth of trees
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-- altprop, arctan version keeps thin dirt/sand on floatlands
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-- math.abs() biomes for planet-like biomes. x4 spread factor
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-- biome noise spread 1024, 2 octaves, 3D
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-- Parameters
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@ -13,22 +14,22 @@ local YMIN = 6000 -- Approximate base of realm stone
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local YMAX = 8000 -- Approximate top of atmosphere / mountains / floatlands
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local TERCEN = 6960 -- Terrain 'centre'. Approximate average seabed level
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local YWAT = 7024 -- Sea level
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local CLOUDY = 7152 -- Cloud level
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local YCLOUD = 7152 -- Cloud level
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local TERSCA = 384 -- Vertical terrain scale
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local XLSAMP = 0 -- Extra large scale height variation amplitude
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local BASAMP = 0.3 -- Base terrain amplitude
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local CANAMP = 0.7 -- Canyon terrain amplitude
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local BASAMP = 0.4 -- Base terrain amplitude
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local CANAMP = 0.6 -- Canyon terrain amplitude
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local CANEXP = 1.33 -- Canyon shape exponent
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local ATANAMP = 1.4 -- Arctan function amplitude. Controls size and number of floatlands / caves
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local ATANAMP = 1.2 -- Arctan function amplitude, controls size and number of floatlands / caves
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local TSTONE = 0.02 -- Density threshold for stone
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local TRIV = -0.017 -- Maximum densitybase threshold for river water
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local TSAND = -0.02 -- Maximum densitybase threshold for sand
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local FIST = 0 -- Fissure threshold at surface. Controls size of fissure entrances at surface
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local TSTONE = 0.02 -- Density threshold for stone, depth of soil at TERCEN
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local TRIV = -0.015 -- Maximum densitybase threshold for river water
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local TSAND = -0.018 -- Maximum densitybase threshold for river sand
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local FIST = 0 -- Fissure threshold at surface, controls size of fissure entrances at surface
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local FISEXP = 0.02 -- Fissure expansion rate under surface
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local ORECHA = 1 / (7 * 7 * 7) -- Ore chance per stone node
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local CLOUT = 0.5 -- Cloud threshold
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local ORECHA = 7 * 7 * 7 -- Ore chance per stone node
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local TCLOUD = 1 -- Cloud threshold
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local PINCHA = 47 -- Pine tree 1/x chance per node
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local APTCHA = 47 -- Appletree
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@ -61,7 +62,7 @@ local np_smooth = {
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scale = 1,
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spread = {x=512, y=512, z=512},
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seed = 593,
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octaves = 6,
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octaves = 5,
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persist = 0.4
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}
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@ -76,6 +77,17 @@ local np_fissure = {
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persist = 0.5
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}
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-- 3D noise for biomes
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local np_biome = {
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offset = 0,
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scale = 1,
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spread = {x=1024, y=1024, z=1024},
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seed = -677772,
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octaves = 2,
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persist = 0.5
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}
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-- 2D noise for base terrain / riverbed height / mountain ranges, terrain blend, river and river sand depth
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local np_base = {
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@ -87,17 +99,6 @@ local np_base = {
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persist = 0.4
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}
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-- 2D noise for biomes
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local np_biome = {
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offset = 0,
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scale = 1,
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spread = {x=512, y=512, z=512},
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seed = -677772,
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octaves = 3,
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persist = 0.5
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}
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-- 2D noise for extra large scale height variation
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local np_xlscale = {
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@ -114,10 +115,10 @@ local np_xlscale = {
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local np_cloud = {
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offset = 0,
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scale = 1,
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spread = {x=104, y=104, z=104},
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spread = {x=207, y=207, z=207},
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seed = 2113,
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octaves = 3,
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persist = 0.9
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octaves = 4,
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persist = 0.8
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}
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-- Stuff
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@ -181,9 +182,9 @@ minetest.register_on_generated(function(minp, maxp, seed)
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local nvals_rough = minetest.get_perlin_map(np_rough, chulens):get3dMap_flat(minposxyz)
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local nvals_smooth = minetest.get_perlin_map(np_smooth, chulens):get3dMap_flat(minposxyz)
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local nvals_fissure = minetest.get_perlin_map(np_fissure, chulens):get3dMap_flat(minposxyz)
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local nvals_biome = minetest.get_perlin_map(np_biome, chulens):get3dMap_flat(minposxyz)
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local nvals_base = minetest.get_perlin_map(np_base, chulens):get2dMap_flat(minposxz)
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local nvals_biome = minetest.get_perlin_map(np_biome, chulens):get2dMap_flat(minposxz)
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local nvals_xlscale = minetest.get_perlin_map(np_xlscale, chulens):get2dMap_flat(minposxz)
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local nvals_cloud = minetest.get_perlin_map(np_cloud, chulens):get2dMap_flat(minposxz)
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@ -191,10 +192,12 @@ minetest.register_on_generated(function(minp, maxp, seed)
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local nixz = 1
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local stable = {}
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local under = {}
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local soil = {}
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for z = z0, z1 do -- for each xy plane progressing northwards
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for x = x0, x1 do
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local si = x - x0 + 1
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under[si] = 0
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soil[si] = 0
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local nodename = minetest.get_node({x=x,y=y0-1,z=z}).name
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if nodename == "air"
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or nodename == "default:water_source" then
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@ -210,14 +213,16 @@ minetest.register_on_generated(function(minp, maxp, seed)
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local si = x - x0 + 1
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local grad = math.atan((TERCEN - y) / TERSCA) * ATANAMP
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local n_base = nvals_base[nixz]
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local n_biome = nvals_biome[nixz]
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local terblen = 1 - math.abs(n_base)
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local densitybase = terblen * BASAMP + nvals_xlscale[nixz] * XLSAMP + grad
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local triv = TRIV * (1 - terblen * 1.1) -- 1.1 river disappears before ridge top
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local tsand = TSAND * (1 - terblen * 1.1)
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local tstone = TSTONE * (1 + grad)
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local n_biome = math.abs(nvals_biome[nixz]) -- math.abs() for planet like biomes: polar blobs and desert networks
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local terblen = math.max(1 - math.abs(n_base), 0)
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local densitybase = (1 - math.abs(n_base)) * BASAMP + nvals_xlscale[nixz] * XLSAMP + grad
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local altprop = (y - YWAT) / (TERCEN + TERSCA - YWAT)
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local triv = TRIV * (1 - altprop * 1.1)
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local tsand = TSAND * (1 - altprop * 1.1)
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local tstone = TSTONE * (1 - math.atan(altprop) * 0.6) -- 1 to 0.05 for thin dirt/sand on floatlands
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local density = densitybase
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+ math.abs(nvals_rough[nixyz] * terblen + nvals_smooth[nixyz] * (1 - terblen)) ^ CANEXP * CANAMP
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+ math.abs(nvals_rough[nixyz] * terblen
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+ nvals_smooth[nixyz] * (1 - terblen)) ^ CANEXP * CANAMP
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local nofis = false
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if density >= 0 then -- if terrain set fissure flag
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@ -229,9 +234,9 @@ minetest.register_on_generated(function(minp, maxp, seed)
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if density >= tstone and nofis -- stone cut by fissures
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or (density >= tstone and density < TSTONE * 3 and y <= YWAT) -- or stone layer around water
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or (density >= tstone and density < TSTONE * 3 and densitybase >= triv ) then -- or stone layer around river
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if n_biome > 0.8 then
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if n_biome < 0.15 then
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data[vi] = c_wsredstone
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elseif math.random() < ORECHA then
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elseif math.random(ORECHA) == 2 then
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local osel = math.random(34)
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if osel == 34 then
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data[vi] = c_stodiam
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@ -251,73 +256,83 @@ minetest.register_on_generated(function(minp, maxp, seed)
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end
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stable[si] = stable[si] + 1
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under[si] = 0
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soil[si] = 0
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elseif density >= 0 and density < tstone and stable[si] >= 2 then -- fine materials
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if densitybase >= tsand or y <= YWAT + 1 + math.random(2) then -- river / seabed not cut by fissures
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data[vi] = c_sand
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if densitybase >= tsand + math.random() * 0.003 or y <= YWAT + 1 + math.random(2) then
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data[vi] = c_sand -- river / seabed sand not cut by fissures
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elseif nofis then -- fine materials cut by fissures
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if n_biome > 0.8 then
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if n_biome < 0.15 then
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data[vi] = c_desand
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under[si] = 6 -- desert
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elseif n_biome > 0.4 then
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elseif n_biome < 0.3 then
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data[vi] = c_wsdirt
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under[si] = 5 -- savanna
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elseif n_biome > 0 then
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soil[si] = soil[si] + 1
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elseif n_biome < 0.45 then
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data[vi] = c_wsdirt
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under[si] = 4 -- rainforest
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elseif n_biome > -0.4 then
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soil[si] = soil[si] + 1
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elseif n_biome < 0.6 then
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data[vi] = c_wsdirt
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under[si] = 3 -- grassland
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elseif n_biome > -0.8 then
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elseif n_biome < 0.75 then
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data[vi] = c_wsdirt
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under[si] = 2 -- forest
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soil[si] = soil[si] + 1
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else
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data[vi] = c_wsdirt
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under[si] = 1 -- taiga
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soil[si] = soil[si] + 1
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end
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else -- fissure
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stable[si] = 0
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under[si] = 0
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soil[si] = 0
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end
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elseif y <= YWAT and density < tstone then -- sea water, not in fissures
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if y == YWAT and n_biome < -1 then
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if y == YWAT and n_biome > 0.9 then
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data[vi] = c_ice
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else
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data[vi] = c_water
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if y == YWAT and n_biome > 0.2 and stable[si] >= 1
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if y == YWAT and n_biome < 0.45 and stable[si] >= 1
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and math.random(PAPCHA) == 2 then -- papyrus in desert and rainforest
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watershed_papyrus(x, y, z, area, data)
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end
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end
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stable[si] = 0
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under[si] = 0
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soil[si] = 0
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elseif densitybase >= triv and density < tstone then -- river water, not in fissures
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if n_biome < -1 then
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if n_biome > 0.9 then
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data[vi] = c_ice
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else
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data[vi] = c_wswater
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end
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stable[si] = 0
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under[si] = 0
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elseif y == CLOUDY then -- clouds
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soil[si] = 0
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elseif y == YCLOUD then -- clouds
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local xrq = 16 * math.floor((x - x0) / 16)
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local zrq = 16 * math.floor((z - z0) / 16)
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local qixz = zrq * sidelen + xrq + 1
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if nvals_cloud[qixz] > CLOUT then
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local qixz = zrq * 80 + xrq + 1
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if nvals_cloud[qixz] > TCLOUD and nvals_biome[qixz] > 0.15 then
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data[vi] = c_wscloud
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end
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stable[si] = 0
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under[si] = 0
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soil[si] = 0
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else -- possible above surface air node
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if y >= YWAT and under[si] ~= 0 then
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if under[si] == 1 then
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if n_biome > -1 and math.random(PINCHA) == 2 then
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if n_biome < 0.9 and math.random(PINCHA) == 2
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and soil[si] >= 4 then
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watershed_pinetree(x, y, z, area, data)
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else
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data[viu] = c_dirtsnow
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data[vi] = c_snowblock
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end
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elseif under[si] == 2 then
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if math.random(APTCHA) == 2 then
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if math.random(APTCHA) == 2 and soil[si] >= 2 then
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watershed_appletree(x, y, z, area, data)
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else
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data[viu] = c_wsgrass
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@ -339,7 +354,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
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end
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end
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elseif under[si] == 4 then
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if math.random(JUTCHA) == 2 then
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if math.random(JUTCHA) == 2 and soil[si] >= 5 then
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watershed_jungletree(x, y, z, area, data)
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else
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data[viu] = c_wsgrass
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@ -348,7 +363,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
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end
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end
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elseif under[si] == 5 then
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if math.random(ACACHA) == 2 then
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if math.random(ACACHA) == 2 and soil[si] >= 3 then
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watershed_acaciatree(x, y, z, area, data)
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else
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data[viu] = c_wsdrygrass
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@ -356,7 +371,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
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data[vi] = c_wsgoldgrass
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end
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end
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elseif under[si] == 6 and n_biome < 1 then
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elseif under[si] == 6 and n_biome > 0.1 then
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if math.random(CACCHA) == 2 then
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watershed_cactus(x, y, z, area, data)
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elseif math.random(DRYCHA) == 2 then
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@ -366,6 +381,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
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end
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stable[si] = 0
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under[si] = 0
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soil[si] = 0
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end
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nixyz = nixyz + 1
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nixz = nixz + 1
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