Watershed mapgen
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Mat
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@ -1,4 +1,4 @@
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watershedmini 0.1.0 by paramat
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watershedmini 0.2.0 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, textures CC BY-SA
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87
init.lua
87
init.lua
@ -1,24 +1,26 @@
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-- watershedmini 0.1.0 by paramat
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-- watershedmini 0.2.0 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, textures CC BY-SA
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-- Parameters
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local ZOOM = 32
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local ZOOM = 16 -- Must be 2^n. Reduce octaves to avoid spread of highest octave being < 1
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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/ZOOM -- Terrain 'centre', average seabed level
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local YWAT = 0 -- Sea surface y
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local YWAT = 1 -- Sea surface y
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local TERCEN = YWAT - 128/ZOOM -- Terrain zero level, average seabed
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local TERSCA = 512/ZOOM -- 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 XLSAMP = 0.1 -- Extra large scale height variation amplitude
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local BASAMP = 0.3 -- Base terrain amplitude
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local MIDAMP = 0.1 -- Mid terrain amplitude
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local CANAMP = 0.4 -- 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 TRIV = -0.02 -- Maximum densitybase threshold for river water
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local BLENEXP = 2 -- Terrain blend exponent
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local TRIVER = -0.028 -- Densitybase threshold for river surface
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local TSTREAM = -0.004 -- Densitymid threshold for stream surface
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local HITET = 0.35 -- High temperature threshold
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local LOTET = -0.35 -- Low ..
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@ -26,29 +28,29 @@ local ICETET = -0.7 -- Ice ..
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local HIHUT = 0.35 -- High humidity threshold
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local LOHUT = -0.35 -- Low ..
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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/ZOOM, y=512/ZOOM, z=512/ZOOM},
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spread = {x=384/ZOOM, y=192/ZOOM, z=384/ZOOM},
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seed = 593,
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octaves = 4,
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persist = 0.67
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}
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-- 3D noise for smooth terrain
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-- 2D noise for mid terrain / streambed height
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local np_smooth = {
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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=512/ZOOM, y=512/ZOOM, z=512/ZOOM},
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seed = 593,
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octaves = 4,
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persist = 0.33
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spread = {x=768/ZOOM, y=768/ZOOM, z=768/ZOOM},
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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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-- 2D noise for base terrain / riverbed height
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local np_base = {
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offset = 0,
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@ -75,9 +77,9 @@ local np_xlscale = {
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local np_temp = {
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offset = 0,
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scale = 1,
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spread = {x=1024/ZOOM, y=1024/ZOOM, z=1024/ZOOM},
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spread = {x=512/ZOOM, y=512/ZOOM, z=512/ZOOM},
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seed = 9130,
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octaves = 2,
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octaves = 3,
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persist = 0.5
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}
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@ -86,9 +88,9 @@ local np_temp = {
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local np_humid = {
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offset = 0,
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scale = 1,
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spread = {x=1024/ZOOM, y=1024/ZOOM, z=1024/ZOOM},
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spread = {x=512/ZOOM, y=512/ZOOM, z=512/ZOOM},
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seed = -55500,
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octaves = 2,
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octaves = 3,
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persist = 0.5
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}
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@ -131,6 +133,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
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local c_ice = minetest.get_content_id("default:ice")
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local c_freshwater = minetest.get_content_id("watershedmini:freshwater")
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local c_stone = minetest.get_content_id("watershedmini:stone")
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local c_grass = minetest.get_content_id("watershedmini:grass")
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local c_drygrass = minetest.get_content_id("watershedmini:drygrass")
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local c_icydirt = minetest.get_content_id("watershedmini:icydirt")
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@ -142,11 +145,11 @@ minetest.register_on_generated(function(minp, maxp, seed)
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local minposxyz = {x=x0, y=y0, z=z0} -- 3D and 2D perlinmaps start from these co-ordinates
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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_smooth = minetest.get_perlin_map(np_smooth, 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_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_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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@ -157,25 +160,25 @@ minetest.register_on_generated(function(minp, maxp, seed)
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for y = y0, y1 do -- for each x row progressing upwards
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local vi = area:index(x0, y, z) -- voxelmanip index for first node in this x row
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for x = x0, x1 do -- for each node do
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local n_rough = nvals_rough[nixyz]
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local n_smooth = nvals_smooth[nixyz]
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local n_absterrain = math.abs(nvals_terrain[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_base = nvals_base[nixz]
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local n_absmid = math.abs(nvals_mid[nixz])
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local n_absbase = math.abs(nvals_base[nixz])
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local n_xlscale = nvals_xlscale[nixz]
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local n_invbase = (1 - n_absbase)
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local terblen = (math.max(n_invbase, 0)) ^ BLENEXP
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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)
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local terblenexp = terblen ^ 2
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local canexp = 0.5 + terblenexp
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local canamp = 0.02 + terblenexp * 0.4
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local densitycan =
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(math.abs(n_rough * terblenexp + n_smooth * (1 - terblenexp))) ^ canexp * canamp
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local density = densitybase + densitycan
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-- other values
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local triv = TRIV * (1 - terblen) -- river threshold
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local densitybase = n_invbase * BASAMP + n_xlscale * XLSAMP + grad
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local densitymid = n_absmid * MIDAMP + densitybase
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local canexp = 0.5 + terblen * 0.5
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local canamp = terblen * CANAMP
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local density = n_absterrain ^ canexp * canamp * n_absmid + densitymid
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local triver = TRIVER * n_absbase -- river threshold
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local tstream = TSTREAM * (1 - n_absmid) -- stream threshold
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local biome = false -- select biome for node
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if n_temp < LOTET then
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@ -207,10 +210,12 @@ minetest.register_on_generated(function(minp, maxp, seed)
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if density >= 0 then -- ground
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if y < YWAT then
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data[vi] = c_sand
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elseif biome == 1 then
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data[vi] = c_icydirt
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elseif biome == 2 or biome == 3 then
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data[vi] = c_snowblock
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elseif grad < -1 then
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data[vi] = c_stone
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elseif biome == 1 then
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data[vi] = c_icydirt
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elseif biome == 4 then
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data[vi] = c_drygrass
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elseif biome == 5 then
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@ -230,7 +235,9 @@ minetest.register_on_generated(function(minp, maxp, seed)
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else
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data[vi] = c_water
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end
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elseif densitybase >= triv then -- river water
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elseif densitybase >= triver then -- river water
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data[vi] = c_freshwater
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elseif densitybase >= tstream then -- stream water
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data[vi] = c_freshwater
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end
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46
nodes.lua
46
nodes.lua
@ -1,3 +1,12 @@
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minetest.register_node("watershedmini:stone", {
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description = "Stone",
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tiles = {"default_stone.png"},
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is_ground_content = false,
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groups = {cracky=3},
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drop = "default:cobble",
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sounds = default.node_sound_stone_defaults(),
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})
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minetest.register_node("watershedmini:appleleaf", {
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description = "Appletree leaves",
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drawtype = "allfaces_optional",
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@ -91,40 +100,3 @@ minetest.register_node("watershedmini:freshwater", {
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post_effect_color = {a=64, r=100, g=100, b=200},
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groups = {water=3, liquid=3, puts_out_fire=1},
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})
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minetest.register_node("watershedmini:freshwaterflow", {
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description = "Fresh Flowing Water",
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inventory_image = minetest.inventorycube("watershedmini_freshwater.png"),
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drawtype = "flowingliquid",
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tiles = {"watershedmini_freshwater.png"},
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special_tiles = {
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{
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image="watershedmini_freshwaterflowanim.png",
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backface_culling=false,
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animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=0.8}
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},
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{
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image="watershedmini_freshwaterflowanim.png",
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backface_culling=true,
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animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=0.8}
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},
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},
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alpha = WATER_ALPHA,
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paramtype = "light",
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paramtype2 = "flowingliquid",
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is_ground_content = false,
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walkable = false,
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pointable = false,
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diggable = false,
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buildable_to = true,
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drop = "",
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drowning = 1,
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liquidtype = "flowing",
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liquid_alternative_flowing = "watershedmini:freshwaterflow",
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liquid_alternative_source = "watershedmini:freshwater",
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liquid_viscosity = WATER_VISC,
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liquid_renewable = false,
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liquid_range = 0,
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post_effect_color = {a=64, r=100, g=100, b=200},
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groups = {water=3, liquid=3, puts_out_fire=1, not_in_creative_inventory=1},
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})
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BIN
textures/watershedmini_freshwateranim.png
Normal file
BIN
textures/watershedmini_freshwateranim.png
Normal file
Binary file not shown.
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After Width: | Height: | Size: 4.8 KiB |
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