New river generation from riverdev mod

This commit is contained in:
paramat 2014-05-01 12:44:35 +01:00
parent dfb5a5660f
commit e3d448a3ec
2 changed files with 59 additions and 48 deletions

View File

@ -1,4 +1,4 @@
watershed 0.3.15 by paramat
watershed 0.4.0 by paramat
For latest stable Minetest back to 0.4.8
Depends default bucket
Licenses: code WTFPL, textures CC BY-SA

105
init.lua
View File

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