264 lines
6.8 KiB
Lua
264 lines
6.8 KiB
Lua
-- pathv6alt 0.1.0 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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-- Parameters
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-- 2D noise for base terrain
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local np_base = {
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offset = -4,
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scale = 20,
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spread = {x=250, y=250, z=250},
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seed = 82341,
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octaves = 5,
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persist = 0.6
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}
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-- 2D noise for higher terrain
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local np_higher = {
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offset = 20,
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scale = 16,
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spread = {x=500, y=500, z=500},
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seed = 85039,
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octaves = 5,
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persist = 0.6
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}
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-- 2D noise for height select
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local np_hselect = {
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offset = 0.5,
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scale = 1,
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spread = {x=250, y=250, z=250},
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seed = 4213,
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octaves = 4, -- default - 1
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persist = 0.69
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}
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-- 2D noise for mud
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local np_mud = {
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offset = 4,
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scale = 2,
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spread = {x=200, y=200, z=200},
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seed = 91013,
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octaves = 3,
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persist = 0.55
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}
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-- 2D noise for patha
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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=256, y=256, z=256},
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seed = 11,
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octaves = 4,
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persist = 0.33
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}
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-- 2D noise for pathb
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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=256, y=256, z=256},
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seed = -80033,
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octaves = 4,
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persist = 0.33
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}
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-- Nodes
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minetest.register_node("pathv6alt:wood", {
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description = "Path Planks",
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tiles = {"default_wood.png"},
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is_ground_content = false,
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groups = {choppy=2,oddly_breakable_by_hand=2,flammable=3,wood=1},
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drop = "default:wood",
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sounds = default.node_sound_wood_defaults(),
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})
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minetest.register_node("pathv6alt:path", {
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description = "Path",
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tiles = {"pathv6alt_path.png"},
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is_ground_content = false,
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groups = {crumbly=2},
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drop = "default:dirt",
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sounds = default.node_sound_dirt_defaults(),
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})
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minetest.register_node("pathv6alt:tree", {
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description = "Tree",
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tiles = {"default_tree_top.png", "default_tree_top.png", "default_tree.png"},
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paramtype2 = "facedir",
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is_ground_content = false,
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groups = {tree=1,choppy=2,oddly_breakable_by_hand=1,flammable=2},
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drop = "default:tree",
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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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-- On generated function
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minetest.register_on_generated(function(minp, maxp, seed)
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if minp.y ~= -32 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 ("[pathv6alt] 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_tree = minetest.get_content_id("default:tree")
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local c_juntree = minetest.get_content_id("default:jungletree")
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local c_leaf = minetest.get_content_id("default:leaves")
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local c_apple = minetest.get_content_id("default:apple")
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local c_junleaf = minetest.get_content_id("default:jungleleaves")
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local c_sand = minetest.get_content_id("default:sand")
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local c_dirt = minetest.get_content_id("default:dirt")
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local c_grass = minetest.get_content_id("default:dirt_with_grass")
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local c_desand = minetest.get_content_id("default:desert_sand")
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local c_stone = minetest.get_content_id("default:stone")
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local c_destone = minetest.get_content_id("default:desert_stone")
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local c_wood = minetest.get_content_id("pathv6alt:wood")
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local c_path = minetest.get_content_id("pathv6alt:path")
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local c_column = minetest.get_content_id("pathv6alt:tree")
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local sidelen = x1 - x0 + 1
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local overlen = sidelen + 1
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local emerlen = sidelen + 32 -- voxelmanip emerged volume edge length for vvii
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local chulens = {x=overlen, y=overlen, z=sidelen}
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local minpos = {x=x0-1, y=z0-1}
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local nvals_base = minetest.get_perlin_map(np_base, chulens):get2dMap_flat({x=x0+124, y=z0+124}) -- offsets - 1
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local nvals_higher = minetest.get_perlin_map(np_higher, chulens):get2dMap_flat({x=x0+249, y=z0+249})
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local nvals_hselect = minetest.get_perlin_map(np_hselect, chulens):get2dMap_flat({x=x0+124, y=z0+124})
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local nvals_mud = minetest.get_perlin_map(np_mud, chulens):get2dMap_flat({x=x0+99, y=z0+99})
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local nvals_patha = minetest.get_perlin_map(np_patha, chulens):get2dMap_flat(minpos)
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local nvals_pathb = minetest.get_perlin_map(np_pathb, chulens):get2dMap_flat(minpos)
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local ni = 1
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local stable = {}
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for z = z0 - 1, z1 do
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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 chunk = x >= x0 and z >= z0
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local n_patha = nvals_patha[ni]
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local n_zprepatha = nvals_patha[(ni - overlen)]
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local n_pathb = nvals_pathb[ni]
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local n_zprepathb = nvals_pathb[(ni - overlen)]
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if chunk then
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local base = nvals_base[ni]
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local higher = nvals_higher[ni]
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local hselect = nvals_hselect[ni]
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local mudadd = nvals_mud[ni] / 2 + 0.5
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if higher < base then
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higher = base
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end
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local tblend = 0.5 + 0.5 * (hselect - 0.5) -- 0.2
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tblend = math.min(math.max(tblend, 0), 1)
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local tlevel = base * (1 - tblend) + higher * tblend + mudadd
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local pathy = math.floor(math.max(tlevel, 4))
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if (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)
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or (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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local wood = true
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for k = -1, 1 do
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local vi = area:index(x-1, pathy, z+k)
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for i = -1, 1 do
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local nodid = data[vi]
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if nodid == c_sand
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or nodid == c_desand
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or nodid == c_dirt
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or nodid == c_grass
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or nodid == c_stone
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or nodid == c_destone then
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wood = false
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end
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vi = vi + 1
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end
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end
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local excatop
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local vi = area:index(x, pathy + 4, z) -- tunnel roof
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local nodid = data[vi]
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if nodid == c_stone
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or nodid == c_destone then
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excatop = pathy + 3 -- tunnel
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else
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excatop = y1 -- excavate to chunk top
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end
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for y = pathy, excatop do
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for k = -1, 1 do
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local vi = area:index(x-1, y, z+k)
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for i = -1, 1 do
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local nodid = data[vi]
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if y == pathy then
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if wood then
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data[vi] = c_wood
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else
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data[vi] = c_path
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end
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elseif nodid ~= c_wood and nodid ~= c_path then
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data[vi] = c_air
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end
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vi = vi + 1
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end
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end
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end
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if wood and math.random() < 0.2 then
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local vi = area:index(x, pathy - 1, z)
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for y = pathy - 1, y0, -1 do
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local nodid = data[vi]
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if nodid == c_stone
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or nodid == c_destone then
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break
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else
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data[vi] = c_column
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end
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vi = vi - emerlen
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end
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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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ni = ni + 1
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end
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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 ("[pathv6alt] "..chugent.." ms")
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end)
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