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Soil depth table > tree roots. Dirt/sand on floatlands. math.abs() 'planetlike' 3D biomes

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paramat 2014-02-24 11:56:37 +00:00
parent 9f6f937193
commit d7152f18bd
2 changed files with 74 additions and 58 deletions
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2
README.txt
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@ -1,4 +1,4 @@
watershed 0.2.3 by paramat
watershed 0.2.4 by paramat
For latest stable Minetest back to 0.4.8
Depends default
Licenses: code WTFPL

130
init.lua
View File

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