paramat/watershedmini
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Watershed mapgen

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Mat 2014-08-03 03:57:21 +01:00
parent 26aeba69a0
commit ceaa4bedff
4 changed files with 57 additions and 78 deletions
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2
README.txt
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@ -1,4 +1,4 @@
watershedmini 0.1.0 by paramat watershedmini 0.2.0 by paramat
For latest stable Minetest back to 0.4.8 For latest stable Minetest back to 0.4.8
Depends default Depends default
Licenses: code WTFPL, textures CC BY-SA Licenses: code WTFPL, textures CC BY-SA

87
init.lua
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@ -1,24 +1,26 @@
-- watershedmini 0.1.0 by paramat -- watershedmini 0.2.0 by paramat
-- For latest stable Minetest and back to 0.4.8 -- For latest stable Minetest and back to 0.4.8
-- Depends default -- Depends default
-- License: code WTFPL, textures CC BY-SA -- License: code WTFPL, textures CC BY-SA
-- Parameters -- Parameters
local ZOOM = 32 local ZOOM = 16 -- Must be 2^n. Reduce octaves to avoid spread of highest octave being < 1
local YMIN = -33000 -- Approximate base of realm stone local YMIN = -33000 -- Approximate base of realm stone
local YMAX = 33000 -- Approximate top of atmosphere / mountains / floatlands local YMAX = 33000 -- Approximate top of atmosphere / mountains / floatlands
local TERCEN = -160/ZOOM -- Terrain 'centre', average seabed level local YWAT = 1 -- Sea surface y
local YWAT = 0 -- Sea surface y
local TERCEN = YWAT - 128/ZOOM -- Terrain zero level, average seabed
local TERSCA = 512/ZOOM -- Vertical terrain scale local TERSCA = 512/ZOOM -- Vertical terrain scale
local XLSAMP = 0.2 -- Extra large scale height variation amplitude local XLSAMP = 0.1 -- Extra large scale height variation amplitude
local BASAMP = 0.4 -- Base terrain amplitude local BASAMP = 0.3 -- Base terrain amplitude
local MIDAMP = 0.1 -- Mid terrain amplitude
local CANAMP = 0.4 -- Canyon terrain maximum amplitude local CANAMP = 0.4 -- Canyon terrain maximum amplitude
local ATANAMP = 1.1 -- Arctan function amplitude, smaller = more and larger floatlands above ridges local ATANAMP = 1.1 -- Arctan function amplitude, smaller = more and larger floatlands above ridges
local BLENEXP = 2 -- Terrain blend exponent
local TRIV = -0.02 -- Maximum densitybase threshold for river water local TRIVER = -0.028 -- Densitybase threshold for river surface
local TSTREAM = -0.004 -- Densitymid threshold for stream surface
local HITET = 0.35 -- High temperature threshold local HITET = 0.35 -- High temperature threshold
local LOTET = -0.35 -- Low .. local LOTET = -0.35 -- Low ..
@ -26,29 +28,29 @@ local ICETET = -0.7 -- Ice ..
local HIHUT = 0.35 -- High humidity threshold local HIHUT = 0.35 -- High humidity threshold
local LOHUT = -0.35 -- Low .. local LOHUT = -0.35 -- Low ..
-- 3D noise for rough terrain -- 3D noise for terrain
local np_rough = { local np_terrain = {
offset = 0, offset = 0,
scale = 1, scale = 1,
spread = {x=512/ZOOM, y=512/ZOOM, z=512/ZOOM}, spread = {x=384/ZOOM, y=192/ZOOM, z=384/ZOOM},
seed = 593, seed = 593,
octaves = 4, octaves = 4,
persist = 0.67 persist = 0.67
} }
-- 3D noise for smooth terrain -- 2D noise for mid terrain / streambed height
local np_smooth = { local np_mid = {
offset = 0, offset = 0,
scale = 1, scale = 1,
spread = {x=512/ZOOM, y=512/ZOOM, z=512/ZOOM}, spread = {x=768/ZOOM, y=768/ZOOM, z=768/ZOOM},
seed = 593, seed = 85546,
octaves = 4, octaves = 5,
persist = 0.33 persist = 0.5
} }
-- 2D noise for base terrain / riverbed height, terrain blend, river and river sand depth -- 2D noise for base terrain / riverbed height
local np_base = { local np_base = {
offset = 0, offset = 0,
@ -75,9 +77,9 @@ local np_xlscale = {
local np_temp = { local np_temp = {
offset = 0, offset = 0,
scale = 1, scale = 1,
spread = {x=1024/ZOOM, y=1024/ZOOM, z=1024/ZOOM}, spread = {x=512/ZOOM, y=512/ZOOM, z=512/ZOOM},
seed = 9130, seed = 9130,
octaves = 2, octaves = 3,
persist = 0.5 persist = 0.5
} }
@ -86,9 +88,9 @@ local np_temp = {
local np_humid = { local np_humid = {
offset = 0, offset = 0,
scale = 1, scale = 1,
spread = {x=1024/ZOOM, y=1024/ZOOM, z=1024/ZOOM}, spread = {x=512/ZOOM, y=512/ZOOM, z=512/ZOOM},
seed = -55500, seed = -55500,
octaves = 2, octaves = 3,
persist = 0.5 persist = 0.5
} }
@ -131,6 +133,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
local c_ice = minetest.get_content_id("default:ice") local c_ice = minetest.get_content_id("default:ice")
local c_freshwater = minetest.get_content_id("watershedmini:freshwater") local c_freshwater = minetest.get_content_id("watershedmini:freshwater")
local c_stone = minetest.get_content_id("watershedmini:stone")
local c_grass = minetest.get_content_id("watershedmini:grass") local c_grass = minetest.get_content_id("watershedmini:grass")
local c_drygrass = minetest.get_content_id("watershedmini:drygrass") local c_drygrass = minetest.get_content_id("watershedmini:drygrass")
local c_icydirt = minetest.get_content_id("watershedmini:icydirt") local c_icydirt = minetest.get_content_id("watershedmini:icydirt")
@ -142,11 +145,11 @@ minetest.register_on_generated(function(minp, maxp, seed)
local minposxyz = {x=x0, y=y0, z=z0} -- 3D and 2D perlinmaps start from these co-ordinates local minposxyz = {x=x0, y=y0, z=z0} -- 3D and 2D perlinmaps start from these co-ordinates
local minposxz = {x=x0, y=z0} local minposxz = {x=x0, y=z0}
-- 3D and 2D perlinmaps -- 3D and 2D perlinmaps
local nvals_rough = minetest.get_perlin_map(np_rough, chulens):get3dMap_flat(minposxyz) local nvals_terrain = minetest.get_perlin_map(np_terrain, chulens):get3dMap_flat(minposxyz)
local nvals_smooth = minetest.get_perlin_map(np_smooth, chulens):get3dMap_flat(minposxyz)
local nvals_temp = minetest.get_perlin_map(np_temp, 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_humid = minetest.get_perlin_map(np_humid, 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_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_xlscale = minetest.get_perlin_map(np_xlscale, chulens):get2dMap_flat(minposxz)
@ -157,25 +160,25 @@ minetest.register_on_generated(function(minp, maxp, seed)
for y = y0, y1 do -- for each x row progressing upwards for y = y0, y1 do -- for each x row progressing upwards
local vi = area:index(x0, y, z) -- voxelmanip index for first node in this x row local vi = area:index(x0, y, z) -- voxelmanip index for first node in this x row
for x = x0, x1 do -- for each node do for x = x0, x1 do -- for each node do
local n_rough = nvals_rough[nixyz] local n_absterrain = math.abs(nvals_terrain[nixyz])
local n_smooth = nvals_smooth[nixyz]
local n_temp = nvals_temp[nixyz] local n_temp = nvals_temp[nixyz]
local n_humid = nvals_humid[nixyz] local n_humid = nvals_humid[nixyz]
local n_base = nvals_base[nixz] local n_absmid = math.abs(nvals_mid[nixz])
local n_absbase = math.abs(nvals_base[nixz])
local n_xlscale = nvals_xlscale[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 grad = math.atan((TERCEN - y) / TERSCA) * ATANAMP
local densitybase = (1 - math.abs(n_base)) * BASAMP + n_xlscale * XLSAMP + grad local densitybase = n_invbase * BASAMP + n_xlscale * XLSAMP + grad
local terblen = math.max(1 - math.abs(n_base), 0) local densitymid = n_absmid * MIDAMP + densitybase
local terblenexp = terblen ^ 2 local canexp = 0.5 + terblen * 0.5
local canexp = 0.5 + terblenexp local canamp = terblen * CANAMP
local canamp = 0.02 + terblenexp * 0.4 local density = n_absterrain ^ canexp * canamp * n_absmid + densitymid
local densitycan =
(math.abs(n_rough * terblenexp + n_smooth * (1 - terblenexp))) ^ canexp * canamp local triver = TRIVER * n_absbase -- river threshold
local density = densitybase + densitycan local tstream = TSTREAM * (1 - n_absmid) -- stream threshold
-- other values
local triv = TRIV * (1 - terblen) -- river threshold
local biome = false -- select biome for node local biome = false -- select biome for node
if n_temp < LOTET then if n_temp < LOTET then
@ -207,10 +210,12 @@ minetest.register_on_generated(function(minp, maxp, seed)
if density >= 0 then -- ground if density >= 0 then -- ground
if y < YWAT then if y < YWAT then
data[vi] = c_sand data[vi] = c_sand
elseif biome == 1 then
data[vi] = c_icydirt
elseif biome == 2 or biome == 3 then elseif biome == 2 or biome == 3 then
data[vi] = c_snowblock data[vi] = c_snowblock
elseif grad < -1 then
data[vi] = c_stone
elseif biome == 1 then
data[vi] = c_icydirt
elseif biome == 4 then elseif biome == 4 then
data[vi] = c_drygrass data[vi] = c_drygrass
elseif biome == 5 then elseif biome == 5 then
@ -230,7 +235,9 @@ minetest.register_on_generated(function(minp, maxp, seed)
else else
data[vi] = c_water data[vi] = c_water
end end
elseif densitybase >= triv then -- river water elseif densitybase >= triver then -- river water
data[vi] = c_freshwater
elseif densitybase >= tstream then -- stream water
data[vi] = c_freshwater data[vi] = c_freshwater
end end

46
nodes.lua
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@ -1,3 +1,12 @@
minetest.register_node("watershedmini:stone", {
description = "Stone",
tiles = {"default_stone.png"},
is_ground_content = false,
groups = {cracky=3},
drop = "default:cobble",
sounds = default.node_sound_stone_defaults(),
})
minetest.register_node("watershedmini:appleleaf", { minetest.register_node("watershedmini:appleleaf", {
description = "Appletree leaves", description = "Appletree leaves",
drawtype = "allfaces_optional", drawtype = "allfaces_optional",
@ -91,40 +100,3 @@ minetest.register_node("watershedmini:freshwater", {
post_effect_color = {a=64, r=100, g=100, b=200}, post_effect_color = {a=64, r=100, g=100, b=200},
groups = {water=3, liquid=3, puts_out_fire=1}, groups = {water=3, liquid=3, puts_out_fire=1},
}) })
minetest.register_node("watershedmini:freshwaterflow", {
description = "Fresh Flowing Water",
inventory_image = minetest.inventorycube("watershedmini_freshwater.png"),
drawtype = "flowingliquid",
tiles = {"watershedmini_freshwater.png"},
special_tiles = {
{
image="watershedmini_freshwaterflowanim.png",
backface_culling=false,
animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=0.8}
},
{
image="watershedmini_freshwaterflowanim.png",
backface_culling=true,
animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=0.8}
},
},
alpha = WATER_ALPHA,
paramtype = "light",
paramtype2 = "flowingliquid",
is_ground_content = false,
walkable = false,
pointable = false,
diggable = false,
buildable_to = true,
drop = "",
drowning = 1,
liquidtype = "flowing",
liquid_alternative_flowing = "watershedmini:freshwaterflow",
liquid_alternative_source = "watershedmini:freshwater",
liquid_viscosity = WATER_VISC,
liquid_renewable = false,
liquid_range = 0,
post_effect_color = {a=64, r=100, g=100, b=200},
groups = {water=3, liquid=3, puts_out_fire=1, not_in_creative_inventory=1},
})

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