487 lines
13 KiB
Lua
487 lines
13 KiB
Lua
-- riverdev 0.4.0 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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-- LVM checks chunk below
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-- remove atan grad
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-- add 2 paths
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-- Parameters
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local YMIN = -33000
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local YMAX = 33000
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local YWATER = 1
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local YSAND = 5 -- Top of beach
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local YTER = -128 -- Terrain zero level, average seabed level
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local TERSCA = 512 -- Terrain vertical scale in nodes
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local BASAMP = 0.3 -- Base amplitude. Ridge network structure
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local MIDAMP = 0.1 -- Mid amplitude. River valley structure
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local TERAMP = 0.6 -- Primary terrain amplitude. Stream / path valley structure
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local TSTONE = 0.02
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local TRIVER = -0.02
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local TRSAND = -0.025
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local TSTREAM = -0.004
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local TSSAND = -0.005
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-- 3D noise for terrain
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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=384, y=192, z=384},
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seed = 5900033,
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octaves = 5,
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persist = 0.67
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}
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-- 2D noise for mid terrain
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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=768, y=768, z=768},
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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
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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=3072, y=3072, z=3072},
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seed = -990054,
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octaves = 3,
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persist = 0.33
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}
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-- 2D noises for patha / top terrain
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local np_patha = {
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offset = 0,
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scale = 1,
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spread = {x=384, y=384, z=384},
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seed = 7000023,
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octaves = 4,
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persist = 0.4
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}
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-- 2D noises for pathb / top terrain
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local np_pathb = {
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offset = 0,
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scale = 1,
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spread = {x=384, y=384, z=384},
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seed = 23,
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octaves = 4,
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persist = 0.4
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}
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-- Stuff
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riverdev = {}
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minetest.register_on_mapgen_init(function(mgparams)
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minetest.set_mapgen_params({mgname="singlenode"})
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end)
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-- Nodes
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minetest.register_node("riverdev: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("riverdev:dirt", {
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description = "Dirt",
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tiles = {"default_dirt.png"},
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is_ground_content = false,
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groups = {crumbly=3,soil=1},
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sounds = default.node_sound_dirt_defaults(),
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})
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minetest.register_node("riverdev:grass", {
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description = "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 = "riverdev: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("riverdev:path", {
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description = "Dirt Path",
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tiles = {"riverdev_path.png"},
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is_ground_content = false,
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groups = {crumbly=3},
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sounds = default.node_sound_dirt_defaults(),
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})
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minetest.register_node("riverdev:freshwater", {
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description = "Fresh Water Source",
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inventory_image = minetest.inventorycube("riverdev_freshwater.png"),
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drawtype = "liquid",
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tiles = {
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{
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name="riverdev_freshwateranim.png",
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animation={type="vertical_frames",
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aspect_w=16, aspect_h=16, length=2.0}
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}
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},
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special_tiles = {
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{
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name="riverdev_freshwateranim.png",
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animation={type="vertical_frames",
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aspect_w=16, aspect_h=16, length=2.0},
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backface_culling = false,
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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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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 = "riverdev:freshwaterflow",
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liquid_alternative_source = "riverdev: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=150, 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("riverdev:freshwaterflow", {
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description = "Fresh Flowing Water",
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inventory_image = minetest.inventorycube("riverdev_freshwater.png"),
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drawtype = "flowingliquid",
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tiles = {"riverdev_freshwater.png"},
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special_tiles = {
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{
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image="riverdev_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="riverdev_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 = "riverdev:freshwaterflow",
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liquid_alternative_source = "riverdev: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=130, 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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minetest.register_node("riverdev:mixwater", {
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description = "Mixed Water Source",
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inventory_image = minetest.inventorycube("riverdev_mixwater.png"),
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drawtype = "liquid",
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tiles = {
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{
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name="riverdev_mixwateranim.png",
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animation={type="vertical_frames",
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aspect_w=16, aspect_h=16, length=2.0}
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}
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},
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special_tiles = {
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{
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name="riverdev_mixwateranim.png",
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animation={type="vertical_frames",
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aspect_w=16, aspect_h=16, length=2.0},
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backface_culling = false,
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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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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 = "riverdev:mixwaterflow",
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liquid_alternative_source = "riverdev:mixwater",
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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=115, 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("riverdev:mixwaterflow", {
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description = "Flowing Mixed Water",
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inventory_image = minetest.inventorycube("riverdev_mixwater.png"),
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drawtype = "flowingliquid",
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tiles = {"riverdev_mixwater.png"},
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special_tiles = {
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{
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image="riverdev_mixwaterflowanim.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="riverdev_mixwaterflowanim.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 = "riverdev:mixwaterflow",
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liquid_alternative_source = "riverdev:mixwater",
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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=115, 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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-- On generated function
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minetest.register_on_generated(function(minp, maxp, seed)
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if minp.y < YMIN or maxp.y > YMAX then
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return
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end
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local t1 = os.clock()
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local x1 = maxp.x
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local y1 = maxp.y
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local z1 = maxp.z
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local x0 = minp.x
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local y0 = minp.y
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local z0 = minp.z
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print ("[riverdev] chunk minp ("..x0.." "..y0.." "..z0..")")
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local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
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local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
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local data = vm:get_data()
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local c_air = minetest.get_content_id("air")
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local c_ignore = minetest.get_content_id("ignore")
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local c_water = minetest.get_content_id("default:water_source")
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local c_sand = minetest.get_content_id("default:sand")
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local c_dirt = minetest.get_content_id("riverdev:dirt")
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local c_grass = minetest.get_content_id("riverdev:grass")
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local c_stone = minetest.get_content_id("riverdev:stone")
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local c_path = minetest.get_content_id("riverdev:path")
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local c_freshwater = minetest.get_content_id("riverdev:freshwater")
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local c_mixwater = minetest.get_content_id("riverdev:mixwater")
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local c_freshwaterflow = minetest.get_content_id("riverdev:freshwaterflow")
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local c_mixwaterflow = minetest.get_content_id("riverdev:mixwaterflow")
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local sidelen = x1 - x0 + 1 -- chunk sidelen
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local chulensxyz = {x=sidelen+1, y=sidelen+2, z=sidelen+1}
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local minposxyz = {x=x0-1, y=y0-1, z=z0-1}
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local chulensxz = {x=sidelen+1, y=sidelen+1, z=sidelen} -- different because here x=x, y=z
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local minposxz = {x=x0-1, y=z0-1}
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local nvals_terrain = minetest.get_perlin_map(np_terrain, chulensxyz):get3dMap_flat(minposxyz)
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local nvals_mid = minetest.get_perlin_map(np_mid, chulensxz):get2dMap_flat(minposxz)
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local nvals_base = minetest.get_perlin_map(np_base, chulensxz):get2dMap_flat(minposxz)
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local nvals_patha = minetest.get_perlin_map(np_patha, chulensxz):get2dMap_flat(minposxz)
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local nvals_pathb = minetest.get_perlin_map(np_pathb, chulensxz):get2dMap_flat(minposxz)
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local viu = area:index(x0, y0-1, z0)
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local ungen = data[viu] == c_ignore
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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 - 1, z1 do
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for y = y0 - 1, y1 + 1 do
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local vi = area:index(x0-1, y, z)
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local viu = area:index(x0-1, y-1, z)
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local n_xprepatha = false
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local n_xprepathb = false
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for x = x0 - 1, x1 do
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local si = x - x0 + 2
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local nodid = data[vi]
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local nodidu = data[viu]
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local chunk = (x >= x0 and z >= z0)
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local n_patha = nvals_patha[nixz]
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local n_abspatha = math.abs(n_patha)
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local n_zprepatha = nvals_patha[(nixz - sidelen - 1)]
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local n_pathb = nvals_pathb[nixz]
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local n_abspathb = math.abs(n_pathb)
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local n_zprepathb = nvals_pathb[(nixz - sidelen - 1)]
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local n_absterrain = math.abs(nvals_terrain[nixyz])
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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_invbase = (1 - n_absbase)
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local grad = (YTER - y) / TERSCA
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local densitybase = n_invbase * BASAMP + grad
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local densitymid = n_absmid * MIDAMP + densitybase
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local terexp = 0.5 + n_invbase * 0.5
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local teramp = n_invbase * TERAMP
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local density = n_absterrain ^ terexp * teramp * n_absmid * (0.2 + n_abspatha * n_abspathb) + densitymid
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local tstone = TSTONE * (1 + grad)
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local triver = TRIVER * n_absbase
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local trsand = TRSAND * n_absbase
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local tstream = TSTREAM * (1 - n_absmid)
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local tssand = TSSAND * (1 - n_absmid)
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if chunk and y == y0 - 1 then -- overgeneration, initialise tables
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under[si] = 0
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if ungen then -- guess by calculating density
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if density >= 0 then
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stable[si] = 2
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else
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stable[si] = 0
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end
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else -- scan top layer of chunk below
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if nodid == c_air
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or nodid == c_water
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or nodid == c_freshwater
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or nodid == c_freshwaterflow
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or nodid == c_mixwater
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or nodid == c_mixwaterflow then
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stable[si] = 0
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else
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stable[si] = 2
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end
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end
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elseif chunk and y >= y0 and y <= y1 then -- chunk generation
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if density >= tstone then -- stone
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data[vi] = c_stone
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stable[si] = stable[si] + 1
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under[si] = 0
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elseif density < 0 and under[si] ~= 0 and y > YSAND and densitybase < trsand and densitymid < tssand
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and (((n_patha >= 0 and n_xprepatha < 0) or (n_patha < 0 and n_xprepatha >= 0)) -- patha
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or ((n_patha >= 0 and n_zprepatha < 0) or (n_patha < 0 and n_zprepatha >= 0))) then
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for i = -1, 1 do
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for k = -1, 1 do
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local vip = area:index(x+i, y-1, z+k)
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data[vip] = c_path
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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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elseif density < 0 and under[si] ~= 0 and y > YSAND and densitybase < trsand and densitymid < tssand
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and (((n_pathb >= 0 and n_xprepathb < 0) or (n_pathb < 0 and n_xprepathb >= 0)) -- pathb
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or ((n_pathb >= 0 and n_zprepathb < 0) or (n_pathb < 0 and n_zprepathb >= 0))) then
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for i = -1, 1 do
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for k = -1, 1 do
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local vip = area:index(x+i, y-1, z+k)
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data[vip] = c_path
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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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elseif density >= 0 and density < tstone and stable[si] >= 2 then -- fine materials
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if y <= YSAND + math.random() * 2
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or densitybase >= trsand + math.random() * 0.002
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or densitymid >= tssand + math.random() * 0.002 then
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data[vi] = c_sand
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under[si] = 2
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else
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data[vi] = c_dirt
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under[si] = 1
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end
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elseif y <= YWATER and density < tstone then -- sea 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 >= triver then -- river water
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if y == YWATER + 1 then
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data[vi] = c_mixwater
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else
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data[vi] = c_freshwater
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end
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stable[si] = 0
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under[si] = 0
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elseif densitymid >= tstream then -- stream water
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if y == YWATER + 1 then
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data[vi] = c_mixwater
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else
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data[vi] = c_freshwater
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end
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stable[si] = 0
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under[si] = 0
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elseif density < 0 and under[si] ~= 0 then -- air above surface
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if under[si] == 1 and nodidu ~= c_path then
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data[viu] = c_grass
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end
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stable[si] = 0
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under[si] = 0
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else -- air
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stable[si] = 0
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under[si] = 0
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end
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elseif chunk and y == y1 + 1 then -- overgeneration, detect surface, add surface nodes
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if density < 0 and under[si] ~= 0 then
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if under[si] == 1 then
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data[viu] = c_grass
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end
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end
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end
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n_xprepatha = n_patha
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n_xprepathb = n_pathb
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nixyz = nixyz + 1
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nixz = nixz + 1
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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 - sidelen - 1
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end
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nixz = nixz + sidelen + 1
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end
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vm:set_data(data)
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vm:set_lighting({day=0, night=0})
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vm:calc_lighting()
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vm:write_to_map(data)
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local chugent = math.ceil((os.clock() - t1) * 1000)
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print ("[riverdev] "..chugent.." ms")
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end)
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