forked from mtcontrib/watershed
5 biomes, trees, grasses, flowers. tune params
This commit is contained in:
paramat
207
init.lua
207
init.lua
@ -1,22 +1,34 @@
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-- watershed 0.1.1 by paramat
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-- watershed 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
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-- TODO
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-- Faults and strata
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-- Arctan gradient?
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-- Parameters
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local YMIN = 6000
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local YMAX = 8000
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local TERCEN = 7008 -- Terrain centre
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local YWAT = 7024 -- Sea level
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local TERSCA = 512 -- Vertical terrain scale
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local TERSCA = 384 -- Vertical terrain scale
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local BASAMP = 0.3 -- Base terrain amplitude
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local CANAMP = 0.7 -- Canyon terrain amplitude
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local CANEXP = 1.33 -- Canyon shape exponent
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local TSTONE = 0.02 -- Density threshold for stone
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local TDIRT = 0.01 -- Density threshold for dirt
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local BASAMP = 0.5 -- Base terrain amplitude
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local BASEXP = 0.8 -- Base terrain exponent
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local CANAMP = 0.5 -- Canyon terrain amplitude
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local TRIV = -0.012 -- Maximum densitybase threshold for river water
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local TSAND = -0.015 -- Maximum densitybase threshold for sand
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local TRIV = -0.016 -- Maximum densitybase threshold for river water
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local TSAND = -0.02 -- Maximum densitybase threshold for sand
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local PINCHA = 47
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local APTCHA = 47
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local FLOCHA = 36
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local FOGCHA = 9
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local GRACHA = 5
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local JUTCHA = 16
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local JUGCHA = 9
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-- 3D noise for rough terrain
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@ -26,7 +38,7 @@ local np_rough = {
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spread = {x=512, y=512, z=512},
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seed = 593,
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octaves = 6,
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persist = 0.6
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persist = 0.63
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}
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-- 3D noise for smooth terrain
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@ -40,15 +52,15 @@ local np_smooth = {
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persist = 0.4
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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 / mountain ranges, terrain blend, river and river sand depth
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local np_base = {
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offset = 0,
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scale = 1,
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spread = {x=4096, y=4096, z=4096},
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seed = 8890,
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octaves = 3,
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persist = 0.5
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octaves = 4,
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persist = 0.4
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}
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-- 2D noise for biomes
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@ -56,7 +68,7 @@ local np_base = {
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local np_biome = {
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offset = 0,
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scale = 1,
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spread = {x=2048, y=2048, z=2048},
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spread = {x=512, y=512, z=512},
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seed = -677772,
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octaves = 3,
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persist = 0.5
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@ -66,95 +78,8 @@ local np_biome = {
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watershed = {}
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-- Nodes
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minetest.register_node("watershed:grass", {
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description = "WS Grass",
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tiles = {"default_grass.png", "default_dirt.png", "default_grass.png"},
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is_ground_content = false,
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groups = {crumbly=3,soil=1},
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drop = "default:dirt",
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sounds = default.node_sound_dirt_defaults({
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footstep = {name="default_grass_footstep", gain=0.25},
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}),
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})
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minetest.register_node("watershed:redstone", {
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description = "WS Red Stone",
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tiles = {"default_desert_stone.png"},
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groups = {cracky=3},
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sounds = default.node_sound_stone_defaults(),
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})
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minetest.register_node("watershed:stone", {
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description = "WS Stone",
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tiles = {"default_stone.png"},
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groups = {cracky=3},
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sounds = default.node_sound_stone_defaults(),
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})
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minetest.register_node("watershed:water", {
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description = "WS Water Source",
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inventory_image = minetest.inventorycube("default_water.png"),
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drawtype = "liquid",
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tiles = {
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{name="default_water_source_animated.png", animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=2.0}}
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},
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alpha = WATER_ALPHA,
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paramtype = "light",
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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 = "source",
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liquid_alternative_flowing = "watershed:waterflow",
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liquid_alternative_source = "watershed:water",
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liquid_viscosity = WATER_VISC,
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liquid_renewable = false,
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liquid_range = 3,
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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("watershed:waterflow", {
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description = "WS Flowing Water",
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inventory_image = minetest.inventorycube("default_water.png"),
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drawtype = "flowingliquid",
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tiles = {"default_water.png"},
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special_tiles = {
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{
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image="default_water_flowing_animated.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="default_water_flowing_animated.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 = "watershed:waterflow",
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liquid_alternative_source = "watershed:water",
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liquid_viscosity = WATER_VISC,
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liquid_renewable = false,
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liquid_range = 3,
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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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dofile(minetest.get_modpath("watershed").."/nodes.lua")
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dofile(minetest.get_modpath("watershed").."/functions.lua")
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-- On generated function
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@ -183,6 +108,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
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local c_desand = minetest.get_content_id("default:desert_sand")
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local c_snowblock = minetest.get_content_id("default:snowblock")
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local c_dirt = minetest.get_content_id("default:dirt")
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local c_dirtsnow = minetest.get_content_id("default:dirt_with_snow")
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local c_jungrass = minetest.get_content_id("default:junglegrass")
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local c_wswater = minetest.get_content_id("watershed:water")
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local c_wsstone = minetest.get_content_id("watershed:stone")
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@ -203,9 +130,11 @@ minetest.register_on_generated(function(minp, maxp, seed)
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local nixyz = 1
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local nixz = 1
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local stable = {}
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local under = {}
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for z = z0, z1 do -- for each xy plane progressing northwards
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for x = x0, x1 do
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local si = x - x0 + 1
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under[si] = 0
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local nodename = minetest.get_node({x=x,y=y0-1,z=z}).name
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if nodename == "air"
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or nodename == "default:water_source" then
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@ -216,19 +145,19 @@ minetest.register_on_generated(function(minp, maxp, seed)
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end
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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)
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local viu = area:index(x0, y-1, z)
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for x = x0, x1 do -- for each node do
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local si = x - x0 + 1
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local grad = (TERCEN - y) / TERSCA
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local n_base = nvals_base[nixz]
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local terblen = math.max(1 - math.abs(n_base) ^ BASEXP, 0)
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local terblen = 1 - math.abs(n_base)
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local densitybase = terblen * BASAMP
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+ grad
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local triv = TRIV * (1 - terblen)
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local tsand = TSAND * (1 - terblen)
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local tstone = TSTONE -- by height not terblen
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local canexp = 1.2
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local triv = TRIV * (1 - terblen * 1.1) -- 1.1 river disappears before ridge top
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local tsand = TSAND * (1 - terblen * 1.1)
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local tstone = TSTONE * (1 + grad * 1.5)
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local density = densitybase
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+ math.abs(nvals_rough[nixyz] * terblen + nvals_smooth[nixyz] * (1 - terblen)) ^ canexp * CANAMP
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+ math.abs(nvals_rough[nixyz] * terblen + nvals_smooth[nixyz] * (1 - terblen)) ^ CANEXP * CANAMP
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local n_biome = nvals_biome[nixz]
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if density >= tstone then -- stone
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@ -239,32 +168,80 @@ minetest.register_on_generated(function(minp, maxp, seed)
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end
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stable[si] = stable[si] + 1
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elseif density >= 0 and density < tstone and stable[si] >= 2 then -- fine materials
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if densitybase >= tsand or y <= YWAT + math.random(3) then
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if densitybase >= tsand or y <= YWAT + 1 + math.random(2) then
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data[vi] = c_sand -- riverbed, seabed
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else
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if n_biome > 0.5 then
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if n_biome > 0.7 then
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data[vi] = c_desand
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elseif density > TDIRT then
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under[si] = 5 -- desert
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elseif n_biome > 0.2 then
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data[vi] = c_dirt
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elseif n_biome < -0.5 then
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data[vi] = c_snowblock
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under[si] = 4 -- rainforest
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elseif n_biome > -0.2 then
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data[vi] = c_dirt
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under[si] = 3 -- grassland
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elseif n_biome > -0.7 then
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data[vi] = c_dirt
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under[si] = 2 -- forest
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else
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data[vi] = c_wsgrass
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data[vi] = c_dirt
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under[si] = 1 -- taiga
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end
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end
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elseif y <= YWAT then -- sea level water
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data[vi] = c_water
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stable[si] = 0
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under[si] = 0
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elseif densitybase >= triv then -- river water
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data[vi] = c_wswater
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stable[si] = 0
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else
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data[vi] = c_air
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under[si] = 0
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else -- possible above surface air node
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if y >= YWAT and under[si] ~= 0 then
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if under[si] == 1 then
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if trees and math.random(PINCHA) == 2 then
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watershed_pinetree(x, y, z, area, data)
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else
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data[viu] = c_dirtsnow
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data[vi] = c_snowblock
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end
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elseif under[si] == 2 then -- surface node turned to grass
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if trees and math.random(APTCHA) == 2 then
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watershed_appletree(x, y, z, area, data)
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elseif math.random(FLOCHA) == 2 then
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data[viu] = c_wsgrass
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watershed_flower(data, vi)
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elseif math.random(FOGCHA) == 2 then
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data[viu] = c_wsgrass
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watershed_grass(data, vi)
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end
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elseif under[si] == 3 then
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data[viu] = c_wsgrass
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if math.random(GRACHA) == 2 then
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if math.random(3) == 2 then
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watershed_grass(data, vi)
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else
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data[vi] = c_jungrass
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end
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end
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elseif under[si] == 4 then
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if math.random(JUTCHA) == 2 then
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watershed_jungletree(x, y, z, area, data)
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else
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data[viu] = c_wsgrass
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if math.random(JUGCHA) == 2 then
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data[vi] = c_jungrass
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end
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end
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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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end
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nixyz = nixyz + 1 -- increment 3D noise index
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nixz = nixz + 1 -- increment 2D noise index
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vi = vi + 1
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viu = viu + 1
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end
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nixz = nixz - 80 -- rewind 2D noise index by 80 nodes for next x row above
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end
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