mirror of
https://github.com/minetest/minetest_game.git
synced 2024-11-05 01:30:25 +01:00
189 lines
6.9 KiB
Lua
189 lines
6.9 KiB
Lua
-- minetest/default/mapgen.lua
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--
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-- Aliases for map generator outputs
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--
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minetest.register_alias("mapgen_air", "air")
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minetest.register_alias("mapgen_stone", "default:stone")
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minetest.register_alias("mapgen_tree", "default:tree")
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minetest.register_alias("mapgen_leaves", "default:leaves")
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minetest.register_alias("mapgen_apple", "default:apple")
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minetest.register_alias("mapgen_water_source", "default:water_source")
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minetest.register_alias("mapgen_dirt", "default:dirt")
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minetest.register_alias("mapgen_sand", "default:sand")
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minetest.register_alias("mapgen_gravel", "default:gravel")
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minetest.register_alias("mapgen_clay", "default:clay")
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minetest.register_alias("mapgen_lava_source", "default:lava_source")
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minetest.register_alias("mapgen_cobble", "default:cobble")
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minetest.register_alias("mapgen_mossycobble", "default:mossycobble")
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minetest.register_alias("mapgen_dirt_with_grass", "default:dirt_with_grass")
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minetest.register_alias("mapgen_junglegrass", "default:junglegrass")
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minetest.register_alias("mapgen_stone_with_coal", "default:stone_with_coal")
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minetest.register_alias("mapgen_stone_with_iron", "default:stone_with_iron")
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minetest.register_alias("mapgen_mese", "default:mese")
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minetest.register_alias("mapgen_desert_sand", "default:desert_sand")
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minetest.register_alias("mapgen_desert_stone", "default:desert_stone")
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--
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-- Ore generation
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--
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local function generate_ore(name, wherein, minp, maxp, seed, chunks_per_volume, ore_per_chunk, height_min, height_max)
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if maxp.y < height_min or minp.y > height_max then
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return
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end
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local y_min = math.max(minp.y, height_min)
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local y_max = math.min(maxp.y, height_max)
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local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
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local pr = PseudoRandom(seed)
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local num_chunks = math.floor(chunks_per_volume * volume)
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local chunk_size = 3
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if ore_per_chunk <= 4 then
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chunk_size = 2
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end
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local inverse_chance = math.floor(chunk_size*chunk_size*chunk_size / ore_per_chunk)
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--print("generate_ore num_chunks: "..dump(num_chunks))
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for i=1,num_chunks do
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local y0 = pr:next(y_min, y_max-chunk_size+1)
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if y0 >= height_min and y0 <= height_max then
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local x0 = pr:next(minp.x, maxp.x-chunk_size+1)
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local z0 = pr:next(minp.z, maxp.z-chunk_size+1)
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local p0 = {x=x0, y=y0, z=z0}
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for x1=0,chunk_size-1 do
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for y1=0,chunk_size-1 do
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for z1=0,chunk_size-1 do
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if pr:next(1,inverse_chance) == 1 then
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local x2 = x0+x1
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local y2 = y0+y1
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local z2 = z0+z1
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local p2 = {x=x2, y=y2, z=z2}
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if minetest.env:get_node(p2).name == wherein then
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minetest.env:set_node(p2, {name=name})
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end
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end
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end
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end
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end
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end
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end
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--print("generate_ore done")
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end
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function default.make_papyrus(pos, size)
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for y=0,size-1 do
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local p = {x=pos.x, y=pos.y+y, z=pos.z}
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minetest.env:set_node(p, {name="default:papyrus"})
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end
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end
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function default.make_cactus(pos, size)
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for y=0,size-1 do
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local p = {x=pos.x, y=pos.y+y, z=pos.z}
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minetest.env:set_node(p, {name="default:cactus"})
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end
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end
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minetest.register_on_generated(function(minp, maxp, seed)
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generate_ore("default:stone_with_coal", "default:stone", minp, maxp, seed, 1/8/8/8, 5, -31000, 64)
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generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+1, 1/16/16/16, 5, -5, 7)
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generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+2, 1/12/12/12, 5, -16, -5)
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generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+3, 1/9/9/9, 5, -31000, -17)
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if maxp.y >= 2 and minp.y <= 0 then
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-- Generate clay
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-- Assume X and Z lengths are equal
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local divlen = 4
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local divs = (maxp.x-minp.x)/divlen+1;
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for divx=0+1,divs-1-1 do
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for divz=0+1,divs-1-1 do
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local cx = minp.x + math.floor((divx+0.5)*divlen)
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local cz = minp.z + math.floor((divz+0.5)*divlen)
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if minetest.env:get_node({x=cx,y=1,z=cz}).name == "default:water_source" and
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minetest.env:get_node({x=cx,y=0,z=cz}).name == "default:sand" then
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local is_shallow = true
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local num_water_around = 0
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if minetest.env:get_node({x=cx-divlen*2,y=1,z=cz+0}).name == "default:water_source" then
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num_water_around = num_water_around + 1 end
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if minetest.env:get_node({x=cx+divlen*2,y=1,z=cz+0}).name == "default:water_source" then
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num_water_around = num_water_around + 1 end
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if minetest.env:get_node({x=cx+0,y=1,z=cz-divlen*2}).name == "default:water_source" then
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num_water_around = num_water_around + 1 end
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if minetest.env:get_node({x=cx+0,y=1,z=cz+divlen*2}).name == "default:water_source" then
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num_water_around = num_water_around + 1 end
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if num_water_around >= 2 then
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is_shallow = false
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end
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if is_shallow then
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for x1=-divlen,divlen do
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for z1=-divlen,divlen do
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if minetest.env:get_node({x=cx+x1,y=0,z=cz+z1}).name == "default:sand" then
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minetest.env:set_node({x=cx+x1,y=0,z=cz+z1}, {name="default:clay"})
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end
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end
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end
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end
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end
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end
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end
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-- Generate papyrus
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local perlin1 = minetest.env:get_perlin(354, 3, 0.7, 100)
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-- Assume X and Z lengths are equal
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local divlen = 8
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local divs = (maxp.x-minp.x)/divlen+1;
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for divx=0,divs-1 do
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for divz=0,divs-1 do
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local x0 = minp.x + math.floor((divx+0)*divlen)
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local z0 = minp.z + math.floor((divz+0)*divlen)
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local x1 = minp.x + math.floor((divx+1)*divlen)
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local z1 = minp.z + math.floor((divz+1)*divlen)
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-- Determine papyrus amount from perlin noise
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local papyrus_amount = math.floor(perlin1:get2d({x=x0, y=z0}) * 45 - 20)
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-- Find random positions for papyrus based on this random
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local pr = PseudoRandom(seed+1)
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for i=0,papyrus_amount do
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local x = pr:next(x0, x1)
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local z = pr:next(z0, z1)
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if minetest.env:get_node({x=x,y=1,z=z}).name == "default:dirt_with_grass" and
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minetest.env:find_node_near({x=x,y=1,z=z}, 1, "default:water_source") then
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default.make_papyrus({x=x,y=2,z=z}, pr:next(2, 4))
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end
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end
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end
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end
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-- Generate cactuses
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local perlin1 = minetest.env:get_perlin(230, 3, 0.6, 100)
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-- Assume X and Z lengths are equal
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local divlen = 16
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local divs = (maxp.x-minp.x)/divlen+1;
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for divx=0,divs-1 do
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for divz=0,divs-1 do
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local x0 = minp.x + math.floor((divx+0)*divlen)
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local z0 = minp.z + math.floor((divz+0)*divlen)
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local x1 = minp.x + math.floor((divx+1)*divlen)
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local z1 = minp.z + math.floor((divz+1)*divlen)
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-- Determine cactus amount from perlin noise
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local cactus_amount = math.floor(perlin1:get2d({x=x0, y=z0}) * 6 - 3)
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-- Find random positions for cactus based on this random
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local pr = PseudoRandom(seed+1)
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for i=0,cactus_amount do
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local x = pr:next(x0, x1)
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local z = pr:next(z0, z1)
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-- Find ground level (0...15)
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local ground_y = nil
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for y=30,0,-1 do
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if minetest.env:get_node({x=x,y=y,z=z}).name ~= "air" then
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ground_y = y
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break
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end
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end
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-- If desert sand, make cactus
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if ground_y and minetest.env:get_node({x=x,y=ground_y,z=z}).name == "default:desert_sand" then
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default.make_cactus({x=x,y=ground_y+1,z=z}, pr:next(3, 4))
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end
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end
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end
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end
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end
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end)
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