forked from mtcontrib/watershed
New river generation from riverdev mod
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paramat
parent
dfb5a5660f
commit
e3d448a3ec
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@ -1,4 +1,4 @@
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watershed 0.3.15 by paramat
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watershed 0.4.0 by paramat
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For latest stable Minetest back to 0.4.8
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Depends default bucket
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Licenses: code WTFPL, textures CC BY-SA
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105
init.lua
105
init.lua
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@ -1,34 +1,33 @@
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-- watershed 0.3.15 by paramat
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-- watershed 0.4.0 by paramat
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-- For latest stable Minetest and back to 0.4.8
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-- Depends default bucket
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-- License: code WTFPL, textures CC BY-SA
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-- Red cobble texture CC BY-SA by brunob.santos
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-- removed 2 unnecessary 3D noises for speed 4-5s per chunk
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-- squashed terrain noise
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-- flattened lowlands
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-- Parameters
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local YMIN = -33000 -- Approximate base of realm stone
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local YMAX = 33000 -- Approximate top of atmosphere / mountains / floatlands
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local TERCEN = -160 -- Terrain 'centre', average seabed level
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local TERCEN = -80 -- Terrain 'centre', average seabed level
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local YWAT = 1 -- Sea surface y
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local YSAV = 5 -- Average sandline y, dune grasses above this
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local SAMP = 3 -- Sandline amplitude
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local YCLOMIN = 207 -- Minimum height of mod clouds
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local CLOUDS = true -- Mod clouds?
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local TERSCA = 512 -- Vertical terrain scale
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local TERSCA = 256 -- Vertical terrain scale
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local XLSAMP = 0.2 -- Extra large scale height variation amplitude
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local BASAMP = 0.4 -- Base terrain amplitude
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local CANAMP = 0.4 -- Canyon terrain maximum amplitude
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local MIDAMP = 0.2 -- Mid terrain amplitude
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local CANAMP = 0.5 -- Canyon terrain maximum amplitude
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local ATANAMP = 1.1 -- Arctan function amplitude, smaller = more and larger floatlands above ridges
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local BLENEXP = 2 -- Terrain blend exponent
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local TSTONE = 0.02 -- Density threshold for stone, depth of soil at TERCEN
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local TRIV = -0.02 -- Maximum densitybase threshold for river water
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local TSAND = -0.025 -- Maximum densitybase threshold for river sand
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local TRIVER = -0.03
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local TRSAND = -0.033
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local TSTREAM = -0.01
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local TSSAND = -0.011
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local TLAVA = 2.3 -- Maximum densitybase threshold for lava, small because grad is non-linear
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local TFIS = 0.01 -- Fissure threshold, controls width
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local ORETHI = 0.002 -- Ore seam thickness tuner
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@ -45,36 +44,24 @@ local BLEND = 0.03 -- Biome blend randomness
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local PINCHA = 36 -- Pine tree 1/x chance per node
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local APTCHA = 36 -- Appletree
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local FLOCHA = 36 -- Flower
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local FOGCHA = 9 -- Forest grass
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local GRACHA = 5 -- Grassland grasses
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local GRACHA = 9 -- Grassland grasses
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local JUTCHA = 16 -- Jungletree
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local JUGCHA = 9 -- Junglegrass
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local CACCHA = 841 -- Cactus
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local DRYCHA = 169 -- Dry shrub
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local PAPCHA = 2 -- Papyrus
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local PAPCHA = 4 -- Papyrus
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local ACACHA = 841 -- Acacia tree
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local GOGCHA = 5 -- Golden grass
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local DUGCHA = 5 -- Dune grass
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local GOGCHA = 9 -- Golden grass
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local DUGCHA = 9 -- Dune grass
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-- 3D noise for rough terrain
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-- 3D noise for terrain
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local np_rough = {
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local np_terrain = {
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offset = 0,
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scale = 1,
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spread = {x=512, y=256, z=512},
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spread = {x=384, y=192, z=384},
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seed = 593,
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octaves = 6,
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persist = 0.67
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}
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-- 3D noise for alt rough terrain
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local np_roughalt = {
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offset = 0,
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scale = 1,
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spread = {x=414, y=207, z=414},
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seed = -9003,
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octaves = 6,
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octaves = 5,
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persist = 0.67
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}
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@ -133,6 +120,17 @@ local np_strata = {
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persist = 0.5
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}
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-- 2D noise for mid terrain
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local np_mid = {
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offset = 0,
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scale = 1,
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spread = {x=768, y=768, z=768},
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seed = 85546,
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octaves = 5,
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persist = 0.5
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}
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-- 2D noise for base terrain / riverbed height, terrain blend, river and river sand depth
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local np_base = {
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@ -241,14 +239,14 @@ minetest.register_on_generated(function(minp, maxp, seed)
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local minposxyz = {x=x0, y=y0-1, z=z0} -- 3D and 2D perlinmaps start from these co-ordinates, '-1' for overgeneration
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local minposxz = {x=x0, y=z0}
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-- 3D and 2D perlinmaps
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local nvals_rough = minetest.get_perlin_map(np_rough, chulens):get3dMap_flat(minposxyz)
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local nvals_roughalt = minetest.get_perlin_map(np_roughalt, chulens):get3dMap_flat(minposxyz)
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local nvals_terrain = minetest.get_perlin_map(np_terrain, 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_temp = minetest.get_perlin_map(np_temp, chulens):get3dMap_flat(minposxyz)
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local nvals_humid = minetest.get_perlin_map(np_humid, chulens):get3dMap_flat(minposxyz)
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local nvals_seam = minetest.get_perlin_map(np_seam, chulens):get3dMap_flat(minposxyz)
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local nvals_strata = minetest.get_perlin_map(np_strata, chulens):get3dMap_flat(minposxyz)
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local nvals_mid = minetest.get_perlin_map(np_mid, chulens):get2dMap_flat(minposxz)
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local nvals_base = minetest.get_perlin_map(np_base, 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_magma = minetest.get_perlin_map(np_magma, chulens):get2dMap_flat(minposxz)
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@ -269,27 +267,28 @@ minetest.register_on_generated(function(minp, maxp, seed)
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for x = x0, x1 do -- for each node do
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local si = x - x0 + 1 -- stable, under tables index
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-- noise values for node
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local n_rough = nvals_rough[nixyz]
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local n_roughalt = nvals_roughalt[nixyz]
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local n_terrain = nvals_terrain[nixyz]
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local n_fissure = nvals_fissure[nixyz]
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local n_temp = nvals_temp[nixyz]
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local n_humid = nvals_humid[nixyz]
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local n_seam = nvals_seam[nixyz]
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local n_strata = nvals_strata[nixyz]
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local n_absmid = math.abs(nvals_mid[nixz])
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local n_base = nvals_base[nixz]
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local n_xlscale = nvals_xlscale[nixz]
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local n_magma = nvals_magma[nixz]
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-- get densitybase and density
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local grad = math.atan((TERCEN - y) / TERSCA) * ATANAMP
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local densitybase = (1 - math.abs(n_base)) * BASAMP + n_xlscale * XLSAMP + grad
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local terblen = (math.max(1 - math.abs(n_base), 0)) ^ BLENEXP
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local canexp = 0.5 + terblen
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local canamp = 0.01 + terblen * CANAMP
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local density = densitybase + math.abs((n_rough + n_roughalt) * 0.5) ^ canexp * canamp
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local densitymid = n_absmid * MIDAMP + densitybase
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local density = math.abs(n_terrain) * CANAMP * n_absmid + densitymid
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-- other values
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local triv = TRIV * (1 - terblen) -- river threshold
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local tsand = TSAND * (1 - terblen) -- sand threshold
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local terblen = (math.max(1 - math.abs(n_base), 0)) ^ BLENEXP -- = 1 at ridge
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local triver = TRIVER * (1 - terblen) -- river threshold
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local trsand = TRSAND * (1 - terblen) -- sand threshold
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local tstream = TSTREAM * (1 - n_absmid)
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local tssand = TSSAND * (1 - n_absmid)
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local tstone = TSTONE * (1 + grad * 0.5) -- stone threshold
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local tlava = TLAVA * (1 - n_magma ^ 4 * terblen ^ 16 * 0.5) -- lava threshold
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local ysand = YSAV + n_fissure * SAMP + math.random() * 2 -- sandline
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@ -374,7 +373,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
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under[si] = 0
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elseif density >= tstone and nofis -- stone cut by fissures
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or (density >= tstone and density < TSTONE * 1.5 and y <= YWAT) -- stone around water
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or (density >= tstone and density < TSTONE * 1.5 and densitybase >= triv ) then -- stone around river
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or (density >= tstone and density < TSTONE * 1.5 and densitybase >= triver ) then -- stone around river
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local densitystr = n_strata * 0.25 + (TERCEN - y) / TERSCA
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local densityper = densitystr - math.floor(densitystr) -- periodic strata 'density'
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if (densityper >= 0.05 and densityper <= 0.09) -- sandstone strata
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@ -432,9 +431,12 @@ minetest.register_on_generated(function(minp, maxp, seed)
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elseif y <= ysand then -- seabed/beach/dune sand not cut by fissures
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data[vi] = c_sand
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under[si] = 10 -- beach/dunes
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elseif densitybase >= tsand + math.random() * 0.003 then -- river sand not cut by fissures
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elseif densitybase >= trsand + math.random() * 0.003 then -- river sand
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data[vi] = c_sand
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under[si] = 11 -- riverbank
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under[si] = 11 -- riverbank papyrus
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elseif densitymid >= tssand + math.random() * 0.003 then -- stream sand
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data[vi] = c_sand
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under[si] = 0
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elseif nofis then -- fine materials cut by fissures
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if biome == 1 then
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data[vi] = c_wspermafrost
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@ -477,7 +479,19 @@ minetest.register_on_generated(function(minp, maxp, seed)
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data[vi] = c_water
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under[si] = 0
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stable[si] = 0
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elseif densitybase >= triv and density < tstone then -- river water not in fissures
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elseif densitybase >= triver and density < tstone then -- river water not in fissures
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if n_temp < ICETET then
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data[vi] = c_wsfreshice
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else
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if y == YWAT + 1 then
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data[vi] = c_wsmixwater
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else
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data[vi] = c_wsfreshwater
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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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elseif densitymid >= tstream and density < tstone then -- stream water not in fissures
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if n_temp < ICETET then
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data[vi] = c_wsfreshice
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else
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@ -541,9 +555,6 @@ minetest.register_on_generated(function(minp, maxp, seed)
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if math.random(FLOCHA) == 2 then
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data[viu] = c_wsgrass
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watershed_flower(data, vi, fnoise)
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elseif math.random(FOGCHA) == 2 then
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data[viu] = c_wsgrass
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data[vi] = c_grass5
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end
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end
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elseif under[si] == 7 and n_temp < HITET + 0.1 then
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