274 lines
6.9 KiB
Lua
274 lines
6.9 KiB
Lua
-- path 0.1.6 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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-- nodeupdate(pos) for light spread
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-- 2 lines of lights
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-- add desert stone, red concrete
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-- Parameters
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local YFLAT = 1 -- Flat area elevation
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local TERSCA = 64 -- Vertical terrain scale
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local TFLAT = 0.2 -- Flat area width
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local WID = 3 -- Road lane width
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local CACCHA = 1 / 192 ^ 2 -- Cactus chance per node
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-- 2D noise for path and 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=1024, y=1024, z=1024},
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seed = -9111,
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octaves = 4,
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persist = 0.4
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}
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-- 2D noise for alt path and tunnels
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local np_alt = {
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offset = 0,
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scale = 1,
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spread = {x=1024, y=1024, z=1024},
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seed = 11,
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octaves = 4,
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persist = 0.4
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}
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-- Nodes
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minetest.register_node("path:roadblack", {
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description = "Road Black",
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tiles = {"path_roadblack.png"},
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groups = {cracky=2},
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sounds = default.node_sound_stone_defaults(),
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})
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minetest.register_node("path:roadwhite", {
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description = "Road White",
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tiles = {"path_roadwhite.png"},
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groups = {cracky=2},
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sounds = default.node_sound_stone_defaults(),
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})
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minetest.register_node("path:lightoff", {
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description = "Light",
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tiles = {"path_light.png"},
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light_source = 12,
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groups = {cracky=3,oddly_breakable_by_hand=3},
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sounds = default.node_sound_glass_defaults(),
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})
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minetest.register_node("path:lighton", {
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description = "Light",
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tiles = {"path_light.png"},
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light_source = 12,
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groups = {cracky=3,oddly_breakable_by_hand=3},
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sounds = default.node_sound_glass_defaults(),
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})
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minetest.register_node("path:cactus", {
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description = "Cactus",
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tiles = {"default_cactus_top.png", "default_cactus_top.png", "default_cactus_side.png"},
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paramtype2 = "facedir",
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is_ground_content = false,
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groups = {snappy=1, choppy=3, flammable=2},
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drop = "default:cactus",
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sounds = default.node_sound_wood_defaults(),
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on_place = minetest.rotate_node
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})
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minetest.register_node("path:redcrete", {
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description = "Red Concrete",
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tiles = {"path_redcrete.png"},
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groups = {cracky=2},
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sounds = default.node_sound_stone_defaults(),
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})
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-- Stuff
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path = {}
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local rad = WID ^ 2 + 4
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-- Set mapgen parameters
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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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-- Spawn player
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function spawnplayer(player)
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player:setpos({x=0, y=2, z=0})
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end
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minetest.register_on_newplayer(function(player)
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spawnplayer(player)
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end)
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minetest.register_on_respawnplayer(function(player)
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spawnplayer(player)
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return true
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end)
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-- Function
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function path_cactus(x, y, z, area, data)
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local c_cactus = minetest.get_content_id("path:cactus")
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for j = -2, 4 do
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for i = -2, 2 do
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if i == 0 or j == 2 or (j == 3 and math.abs(i) == 2) then
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local vi = area:index(x + i, y + j, z)
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data[vi] = c_cactus
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end
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end
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end
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end
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-- ABM
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minetest.register_abm({
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nodenames = {"path:lightoff"},
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interval = 5,
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chance = 8,
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action = function(pos, node)
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minetest.add_node(pos, {name="path:lighton"})
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nodeupdate(pos)
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end,
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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 > 48 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 ("[path] 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_desand = minetest.get_content_id("default:desert_sand")
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local c_destone = minetest.get_content_id("default:desert_stone")
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local c_redcrete = minetest.get_content_id("path:redcrete")
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local c_roadblack = minetest.get_content_id("path:roadblack")
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local c_roadwhite = minetest.get_content_id("path:roadwhite")
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local c_light = minetest.get_content_id("path:lightoff")
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local sidelen = x1 - x0 + 1
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local chulens = {x=sidelen+1, y=sidelen+1, z=sidelen} -- x = coord x, y = coord z
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local minposxz = {x=x0-1, y=z0-1}
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local nvals_base = minetest.get_perlin_map(np_base, chulens):get2dMap_flat(minposxz)
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local nvals_alt = minetest.get_perlin_map(np_alt, chulens):get2dMap_flat(minposxz)
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local nixz = 1
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for z = z0-1, z1 do
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for y = y0, y1 do
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local vi = area:index(x0-1, y, z)
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local n_xprebase = false
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local n_xprealt = false
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for x = x0-1, x1 do
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local nodid = data[vi]
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local ysurf
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local flat = false
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local n_zprebase = nvals_base[(nixz - 81)]
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local n_zprealt = nvals_alt[(nixz - 81)]
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local chunk = (x >= x0 and z >= z0)
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local n_alt = nvals_alt[nixz]
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local n_absalt = math.abs(n_alt)
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local n_base = nvals_base[nixz]
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local n_absbase = math.abs(n_base)
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if n_absbase > TFLAT then
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ysurf = YFLAT + math.floor((n_absbase - TFLAT) * TERSCA)
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else
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ysurf = YFLAT
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flat = true
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end
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if chunk then
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if y == YFLAT
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and (((n_alt >= 0 and n_xprealt < 0)
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or (n_alt < 0 and n_xprealt >= 0))
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or ((n_alt >= 0 and n_zprealt < 0)
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or (n_alt < 0 and n_zprealt >= 0))) then
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data[vi] = c_roadwhite
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for i = -WID, WID do
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for k = -WID, WID do
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if (math.abs(i)) ^ 2 + (math.abs(k)) ^ 2 <= rad then
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local vi = area:index(x+i, y, z+k)
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local nodid = data[vi]
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if nodid ~= c_roadwhite then
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data[vi] = c_roadblack
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end
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end
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end
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end
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elseif y >= YFLAT + 1 and y <= YFLAT + 4 and n_absalt < 0.025 then
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data[vi] = c_air
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elseif y <= ysurf - 1 and y == YFLAT + 5 and n_absalt > 0.003 and n_absalt < 0.007 then
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data[vi] = c_light
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elseif y <= ysurf and y >= YFLAT and y <= YFLAT + 5
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and n_absalt < 0.035 and n_absbase > TFLAT and nodid ~= c_roadblack then
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data[vi] = c_redcrete
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elseif y == ysurf then
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if ((n_base >= 0 and n_xprebase < 0)
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or (n_base < 0 and n_xprebase >= 0))
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or ((n_base >= 0 and n_zprebase < 0)
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or (n_base < 0 and n_zprebase >= 0)) then
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data[vi] = c_roadwhite
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for i = -WID, WID do
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for k = -WID, WID do
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if (math.abs(i)) ^ 2 + (math.abs(k)) ^ 2 <= rad then
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local vi = area:index(x+i, y, z+k)
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local nodid = data[vi]
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if nodid ~= c_roadwhite then
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data[vi] = c_roadblack
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end
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end
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end
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end
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elseif nodid ~= c_roadblack and nodid ~= c_roadwhite then
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data[vi] = c_desand
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if math.random() < CACCHA then
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path_cactus(x, y+1, z, area, data)
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end
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end
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elseif y <= ysurf - 8 and nodid ~= c_roadblack then
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data[vi] = c_destone
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elseif y < ysurf and nodid ~= c_roadblack then
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data[vi] = c_desand
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end
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end
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n_xprebase = n_base
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n_xprealt = n_alt
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nixz = nixz + 1
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vi = vi + 1
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end
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nixz = nixz - 81
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end
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nixz = nixz + 81
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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 ("[path] "..chugent.." ms")
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end) |