Initial commit

README.txt

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+watershedmini 0.1.0 by paramat
+For latest stable Minetest back to 0.4.8
+Depends default
+Licenses: code WTFPL, textures CC BY-SA

depends.txt

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+default
+bucket

init.lua

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+-- watershedmini 0.1.0 by paramat
+-- For latest stable Minetest and back to 0.4.8
+-- Depends default
+-- License: code WTFPL, textures CC BY-SA
+
+-- Parameters
+
+local ZOOM = 32
+
+local YMIN = -33000 -- Approximate base of realm stone
+local YMAX = 33000 -- Approximate top of atmosphere / mountains / floatlands
+local TERCEN = -160/ZOOM -- Terrain 'centre', average seabed level
+local YWAT = 0 -- Sea surface y
+
+local TERSCA = 512/ZOOM -- 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 ATANAMP = 1.1 -- Arctan function amplitude, smaller = more and larger floatlands above ridges
+
+local TRIV = -0.02 -- Maximum densitybase threshold for river water
+
+local HITET = 0.35 -- High temperature threshold
+local LOTET = -0.35 -- Low ..
+local ICETET = -0.7 -- Ice ..
+local HIHUT = 0.35 -- High humidity threshold
+local LOHUT = -0.35 -- Low ..
+
+-- 3D noise for rough terrain
+
+local np_rough = {
+	offset = 0,
+	scale = 1,
+	spread = {x=512/ZOOM, y=512/ZOOM, z=512/ZOOM},
+	seed = 593,
+	octaves = 4,
+	persist = 0.67
+}
+
+-- 3D noise for smooth terrain
+
+local np_smooth = {
+	offset = 0,
+	scale = 1,
+	spread = {x=512/ZOOM, y=512/ZOOM, z=512/ZOOM},
+	seed = 593,
+	octaves = 4,
+	persist = 0.33
+}
+
+-- 2D noise for base terrain / riverbed height, terrain blend, river and river sand depth
+
+local np_base = {
+	offset = 0,
+	scale = 1,
+	spread = {x=4096/ZOOM, y=4096/ZOOM, z=4096/ZOOM},
+	seed = 8890,
+	octaves = 3,
+	persist = 0.33
+}
+
+-- 2D noise for extra large scale height variation
+
+local np_xlscale = {
+	offset = 0,
+	scale = 1,
+	spread = {x=8192/ZOOM, y=8192/ZOOM, z=8192/ZOOM},
+	seed = -72,
+	octaves = 3,
+	persist = 0.33
+}
+
+-- 3D noise for temperature
+
+local np_temp = {
+	offset = 0,
+	scale = 1,
+	spread = {x=1024/ZOOM, y=1024/ZOOM, z=1024/ZOOM},
+	seed = 9130,
+	octaves = 2,
+	persist = 0.5
+}
+
+-- 3D noise for humidity
+
+local np_humid = {
+	offset = 0,
+	scale = 1,
+	spread = {x=1024/ZOOM, y=1024/ZOOM, z=1024/ZOOM},
+	seed = -55500,
+	octaves = 2,
+	persist = 0.5
+}
+
+-- Stuff
+
+dofile(minetest.get_modpath("watershedmini").."/nodes.lua")
+
+-- Set mapgen parameters
+
+minetest.register_on_mapgen_init(function(mgparams)
+	minetest.set_mapgen_params({mgname="singlenode"})
+end)
+
+-- On generated function
+
+minetest.register_on_generated(function(minp, maxp, seed)
+	if minp.y < YMIN or maxp.y > YMAX then
+		return
+	end
+
+	local t1 = os.clock()
+	local x1 = maxp.x
+	local y1 = maxp.y
+	local z1 = maxp.z
+	local x0 = minp.x
+	local y0 = minp.y
+	local z0 = minp.z
+	
+	print ("[watershedmini] chunk minp ("..x0.." "..y0.." "..z0..")")
+	-- voxelmanip stuff
+	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip") -- min, max points for emerged area/voxelarea
+	local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax} -- voxelarea helper for indexes
+	local data = vm:get_data() -- get flat array of voxelarea content ids
+	-- content ids
+	local c_air = minetest.get_content_id("air")
+	local c_water = minetest.get_content_id("default:water_source")
+	local c_sand = minetest.get_content_id("default:sand")
+	local c_desand = minetest.get_content_id("default:desert_sand")
+	local c_snowblock = minetest.get_content_id("default:snowblock")
+	local c_ice = minetest.get_content_id("default:ice")
+	
+	local c_freshwater = minetest.get_content_id("watershedmini:freshwater")
+	local c_grass = minetest.get_content_id("watershedmini:grass")
+	local c_drygrass = minetest.get_content_id("watershedmini:drygrass")
+	local c_icydirt = minetest.get_content_id("watershedmini:icydirt")
+	local c_appleaf = minetest.get_content_id("watershedmini:appleleaf")
+	local c_junleaf = minetest.get_content_id("watershedmini:jungleleaf")
+	-- perlinmap stuff
+	local sidelen = x1 - x0 + 1 -- chunk sidelength
+	local chulens = {x=sidelen, y=sidelen, z=sidelen} -- chunk dimensions
+	local minposxyz = {x=x0, y=y0, z=z0} -- 3D and 2D perlinmaps start from these co-ordinates
+	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_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_humid = minetest.get_perlin_map(np_humid, chulens):get3dMap_flat(minposxyz)
+	
+	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)
+	
+	-- mapgen loop
+	local nixyz = 1 -- 3D and 2D perlinmap indexes
+	local nixz = 1
+	for z = z0, z1 do -- for each xy plane progressing northwards
+		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
+			for x = x0, x1 do -- for each node do
+				local n_rough = nvals_rough[nixyz]
+				local n_smooth = nvals_smooth[nixyz]
+				local n_temp = nvals_temp[nixyz]
+				local n_humid = nvals_humid[nixyz]
+				
+				local n_base = nvals_base[nixz]
+				local n_xlscale = nvals_xlscale[nixz]
+
+				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)
+				local terblenexp = terblen ^ 2
+				local canexp = 0.5 + terblenexp
+				local canamp = 0.02 + terblenexp * 0.4
+				local densitycan =
+				(math.abs(n_rough * terblenexp + n_smooth * (1 - terblenexp))) ^ canexp * canamp
+				local density = densitybase + densitycan
+				-- other values
+				local triv = TRIV * (1 - terblen) -- river threshold
+				
+				local biome = false -- select biome for node
+				if n_temp < LOTET then
+					if n_humid < LOHUT then
+						biome = 1 -- tundra
+					elseif n_humid > HIHUT then
+						biome = 3 -- taiga
+					else
+						biome = 2 -- snowy plains
+					end
+				elseif n_temp > HITET then
+					if n_humid < LOHUT then
+						biome = 7 -- desert
+					elseif n_humid > HIHUT then
+						biome = 9 -- rainforest
+					else
+						biome = 8 -- savanna
+					end
+				else
+					if n_humid < LOHUT then
+						biome = 4 -- dry grassland
+					elseif n_humid > HIHUT then
+						biome = 6 -- deciduous forest
+					else
+						biome = 5 -- grassland
+					end
+				end
+
+				if density >= 0 then -- ground
+					if y < YWAT then
+						data[vi] = c_sand
+					elseif biome == 1 then
+						data[vi] = c_icydirt
+					elseif biome == 2 or biome == 3 then
+						data[vi] = c_snowblock
+					elseif biome == 4 then
+						data[vi] = c_drygrass
+					elseif biome == 5 then
+						data[vi] = c_appleaf
+					elseif biome == 6 then
+						data[vi] = c_grass
+					elseif biome == 7 then
+						data[vi] = c_desand
+					elseif biome == 8 then
+						data[vi] = c_drygrass
+					elseif biome == 9 then
+						data[vi] = c_junleaf
+					end
+				elseif y <= YWAT then -- sea water
+					if n_temp <= ICETET then
+						data[vi] = c_ice
+					else
+						data[vi] = c_water
+					end
+				elseif densitybase >= triv then -- river water
+					data[vi] = c_freshwater
+				end
+
+				nixyz = nixyz + 1 -- increment perlinmap and voxelarea indexes along x row
+				nixz = nixz + 1
+				vi = vi + 1
+			end
+			nixz = nixz - 80
+		end
+		nixz = nixz + 80
+	end
+	-- voxelmanip stuff
+	vm:set_data(data)
+	vm:set_lighting({day=0, night=0})
+	vm:calc_lighting()
+	vm:write_to_map(data)
+	
+	local chugent = math.ceil((os.clock() - t1) * 1000) -- chunk generation time
+	print ("[watershedmini] "..chugent.." ms")
+end)

license.txt

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+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+                    Version 2, December 2004
+
+ Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+
+ Everyone is permitted to copy and distribute verbatim or modified
+ copies of this license document, and changing it is allowed as long
+ as the name is changed.
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. You just DO WHAT THE FUCK YOU WANT TO.
+                       

nodes.lua

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+minetest.register_node("watershedmini:appleleaf", {
+	description = "Appletree leaves",
+	drawtype = "allfaces_optional",
+	visual_scale = 1.3,
+	tiles = {"default_leaves.png"},
+	paramtype = "light",
+	is_ground_content = false,
+	groups = {snappy=3, flammable=2, leaves=1},
+	sounds = default.node_sound_leaves_defaults(),
+})
+
+minetest.register_node("watershedmini:jungleleaf", {
+	description = "Jungletree leaves",
+	drawtype = "allfaces_optional",
+	visual_scale = 1.3,
+	tiles = {"default_jungleleaves.png"},
+	paramtype = "light",
+	is_ground_content = false,
+	groups = {snappy=3, flammable=2, leaves=1},
+	sounds = default.node_sound_leaves_defaults(),
+})
+
+minetest.register_node("watershedmini:icydirt", {
+	description = "Icy dirt",
+	tiles = {"watershedmini_icydirt.png"},
+	is_ground_content = false,
+	groups = {crumbly=1},
+	drop = "default:dirt",
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name="default_snow_footstep", gain=0.15},
+		dug = {name="default_snow_footstep", gain=0.45},
+	}),
+})
+
+minetest.register_node("watershedmini:grass", {
+	description = "Grass",
+	tiles = {"default_grass.png", "default_dirt.png", "default_grass.png"},
+	is_ground_content = false,
+	groups = {crumbly=3,soil=1},
+	drop = "default:dirt",
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name="default_grass_footstep", gain=0.25},
+	}),
+})
+
+minetest.register_node("watershedmini:drygrass", {
+	description = "Dry grass",
+	tiles = {"watershedmini_drygrass.png"},
+	is_ground_content = false,
+	groups = {crumbly=1,soil=1},
+	drop = "default:dirt",
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name="default_grass_footstep", gain=0.4},
+	}),
+})
+
+minetest.register_node("watershedmini:freshwater", {
+	description = "Fresh Water Source",
+	inventory_image = minetest.inventorycube("watershedmini_freshwater.png"),
+	drawtype = "liquid",
+	tiles = {
+		{
+			name="watershedmini_freshwateranim.png",
+			animation={type="vertical_frames",
+			aspect_w=16, aspect_h=16, length=2.0}
+		}
+	},
+	special_tiles = {
+		{
+			name="watershedmini_freshwateranim.png",
+			animation={type="vertical_frames",
+			aspect_w=16, aspect_h=16, length=2.0},
+			backface_culling = false,
+		}
+	},
+	alpha = WATER_ALPHA,
+	paramtype = "light",
+	is_ground_content = false,
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	buildable_to = true,
+	drop = "",
+	drowning = 1,
+	liquidtype = "source",
+	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},
+})
+
+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},
+})