1 -- minetest/default/mapgen.lua
4 -- Aliases for map generator outputs
7 minetest.register_alias("mapgen_air", "air")
8 minetest.register_alias("mapgen_stone", "default:stone")
9 minetest.register_alias("mapgen_tree", "default:tree")
10 minetest.register_alias("mapgen_leaves", "default:leaves")
11 minetest.register_alias("mapgen_jungletree", "default:jungletree")
12 minetest.register_alias("mapgen_jungleleaves", "default:jungleleaves")
13 minetest.register_alias("mapgen_apple", "default:apple")
14 minetest.register_alias("mapgen_water_source", "default:water_source")
15 minetest.register_alias("mapgen_dirt", "default:dirt")
16 minetest.register_alias("mapgen_sand", "default:sand")
17 minetest.register_alias("mapgen_gravel", "default:gravel")
18 minetest.register_alias("mapgen_clay", "default:clay")
19 minetest.register_alias("mapgen_lava_source", "default:lava_source")
20 minetest.register_alias("mapgen_cobble", "default:cobble")
21 minetest.register_alias("mapgen_mossycobble", "default:mossycobble")
22 minetest.register_alias("mapgen_dirt_with_grass", "default:dirt_with_grass")
23 minetest.register_alias("mapgen_junglegrass", "default:junglegrass")
24 minetest.register_alias("mapgen_stone_with_coal", "default:stone_with_coal")
25 minetest.register_alias("mapgen_stone_with_iron", "default:stone_with_iron")
26 minetest.register_alias("mapgen_mese", "default:mese")
27 minetest.register_alias("mapgen_desert_sand", "default:desert_sand")
28 minetest.register_alias("mapgen_desert_stone", "default:desert_stone")
34 function default.generate_ore(name, wherein, minp, maxp, seed, chunks_per_volume, chunk_size, ore_per_chunk, height_min, height_max)
35 if maxp.y < height_min or minp.y > height_max then
38 local y_min = math.max(minp.y, height_min)
39 local y_max = math.min(maxp.y, height_max)
40 local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
41 local pr = PseudoRandom(seed)
42 local num_chunks = math.floor(chunks_per_volume * volume)
43 local inverse_chance = math.floor(chunk_size*chunk_size*chunk_size / ore_per_chunk)
44 --print("generate_ore num_chunks: "..dump(num_chunks))
46 local y0 = pr:next(y_min, y_max-chunk_size+1)
47 if y0 >= height_min and y0 <= height_max then
48 local x0 = pr:next(minp.x, maxp.x-chunk_size+1)
49 local z0 = pr:next(minp.z, maxp.z-chunk_size+1)
50 local p0 = {x=x0, y=y0, z=z0}
51 for x1=0,chunk_size-1 do
52 for y1=0,chunk_size-1 do
53 for z1=0,chunk_size-1 do
54 if pr:next(1,inverse_chance) == 1 then
58 local p2 = {x=x2, y=y2, z=z2}
59 if minetest.env:get_node(p2).name == wherein then
60 minetest.env:set_node(p2, {name=name})
68 --print("generate_ore done")
71 function default.make_papyrus(pos, size)
73 local p = {x=pos.x, y=pos.y+y, z=pos.z}
74 local nn = minetest.env:get_node(p).name
75 if minetest.registered_nodes[nn] and
76 minetest.registered_nodes[nn].buildable_to then
77 minetest.env:set_node(p, {name="default:papyrus"})
84 function default.make_cactus(pos, size)
86 local p = {x=pos.x, y=pos.y+y, z=pos.z}
87 local nn = minetest.env:get_node(p).name
88 if minetest.registered_nodes[nn] and
89 minetest.registered_nodes[nn].buildable_to then
90 minetest.env:set_node(p, {name="default:cactus"})
97 -- facedir: 0/1/2/3 (head node facedir value)
98 -- length: length of rainbow tail
99 function default.make_nyancat(pos, facedir, length)
100 local tailvec = {x=0, y=0, z=0}
103 elseif facedir == 1 then
105 elseif facedir == 2 then
107 elseif facedir == 3 then
110 print("default.make_nyancat(): Invalid facedir: "+dump(facedir))
114 local p = {x=pos.x, y=pos.y, z=pos.z}
115 minetest.env:set_node(p, {name="default:nyancat", param2=facedir})
117 p.x = p.x + tailvec.x
118 p.z = p.z + tailvec.z
119 minetest.env:set_node(p, {name="default:nyancat_rainbow"})
123 function generate_nyancats(seed, minp, maxp)
124 local height_min = -31000
125 local height_max = -32
126 if maxp.y < height_min or minp.y > height_max then
129 local y_min = math.max(minp.y, height_min)
130 local y_max = math.min(maxp.y, height_max)
131 local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
132 local pr = PseudoRandom(seed + 9324342)
133 local max_num_nyancats = math.floor(volume / (16*16*16))
134 for i=1,max_num_nyancats do
135 if pr:next(0, 1000) == 0 then
136 local x0 = pr:next(minp.x, maxp.x)
137 local y0 = pr:next(minp.y, maxp.y)
138 local z0 = pr:next(minp.z, maxp.z)
139 local p0 = {x=x0, y=y0, z=z0}
140 default.make_nyancat(p0, pr:next(0,3), pr:next(3,15))
145 minetest.register_on_generated(function(minp, maxp, seed)
146 -- Generate regular ores
147 default.generate_ore("default:stone_with_coal", "default:stone", minp, maxp, seed+0, 1/8/8/8, 3, 8, -31000, 64)
148 default.generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+1, 1/12/12/12, 2, 3, -15, 2)
149 default.generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+2, 1/9/9/9, 3, 5, -63, -16)
150 default.generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+3, 1/7/7/7, 3, 5, -31000, -64)
152 default.generate_ore("default:stone_with_mese", "default:stone", minp, maxp, seed+4, 1/16/16/16, 2, 3, -127, -64)
153 default.generate_ore("default:stone_with_mese", "default:stone", minp, maxp, seed+5, 1/9/9/9, 3, 5, -31000, -128)
154 default.generate_ore("default:mese", "default:stone", minp, maxp, seed+8, 1/16/16/16, 2, 3, -31000,-1024)
156 default.generate_ore("default:stone_with_coal", "default:stone", minp, maxp, seed+7, 1/24/24/24, 6,27, -31000, 0)
157 default.generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+6, 1/24/24/24, 6,27, -31000, -64)
159 if maxp.y >= 2 and minp.y <= 0 then
161 -- Assume X and Z lengths are equal
163 local divs = (maxp.x-minp.x)/divlen+1;
164 for divx=0+1,divs-1-1 do
165 for divz=0+1,divs-1-1 do
166 local cx = minp.x + math.floor((divx+0.5)*divlen)
167 local cz = minp.z + math.floor((divz+0.5)*divlen)
168 if minetest.env:get_node({x=cx,y=1,z=cz}).name == "default:water_source" and
169 minetest.env:get_node({x=cx,y=0,z=cz}).name == "default:sand" then
170 local is_shallow = true
171 local num_water_around = 0
172 if minetest.env:get_node({x=cx-divlen*2,y=1,z=cz+0}).name == "default:water_source" then
173 num_water_around = num_water_around + 1 end
174 if minetest.env:get_node({x=cx+divlen*2,y=1,z=cz+0}).name == "default:water_source" then
175 num_water_around = num_water_around + 1 end
176 if minetest.env:get_node({x=cx+0,y=1,z=cz-divlen*2}).name == "default:water_source" then
177 num_water_around = num_water_around + 1 end
178 if minetest.env:get_node({x=cx+0,y=1,z=cz+divlen*2}).name == "default:water_source" then
179 num_water_around = num_water_around + 1 end
180 if num_water_around >= 2 then
184 for x1=-divlen,divlen do
185 for z1=-divlen,divlen do
186 if minetest.env:get_node({x=cx+x1,y=0,z=cz+z1}).name == "default:sand" then
187 minetest.env:set_node({x=cx+x1,y=0,z=cz+z1}, {name="default:clay"})
196 local perlin1 = minetest.env:get_perlin(354, 3, 0.7, 100)
197 -- Assume X and Z lengths are equal
199 local divs = (maxp.x-minp.x)/divlen+1;
202 local x0 = minp.x + math.floor((divx+0)*divlen)
203 local z0 = minp.z + math.floor((divz+0)*divlen)
204 local x1 = minp.x + math.floor((divx+1)*divlen)
205 local z1 = minp.z + math.floor((divz+1)*divlen)
206 -- Determine papyrus amount from perlin noise
207 local papyrus_amount = math.floor(perlin1:get2d({x=x0, y=z0}) * 45 - 20)
208 -- Find random positions for papyrus based on this random
209 local pr = PseudoRandom(seed+1)
210 for i=0,papyrus_amount do
211 local x = pr:next(x0, x1)
212 local z = pr:next(z0, z1)
213 if minetest.env:get_node({x=x,y=1,z=z}).name == "default:dirt_with_grass" and
214 minetest.env:find_node_near({x=x,y=1,z=z}, 1, "default:water_source") then
215 default.make_papyrus({x=x,y=2,z=z}, pr:next(2, 4))
221 local perlin1 = minetest.env:get_perlin(230, 3, 0.6, 100)
222 -- Assume X and Z lengths are equal
224 local divs = (maxp.x-minp.x)/divlen+1;
227 local x0 = minp.x + math.floor((divx+0)*divlen)
228 local z0 = minp.z + math.floor((divz+0)*divlen)
229 local x1 = minp.x + math.floor((divx+1)*divlen)
230 local z1 = minp.z + math.floor((divz+1)*divlen)
231 -- Determine cactus amount from perlin noise
232 local cactus_amount = math.floor(perlin1:get2d({x=x0, y=z0}) * 6 - 3)
233 -- Find random positions for cactus based on this random
234 local pr = PseudoRandom(seed+1)
235 for i=0,cactus_amount do
236 local x = pr:next(x0, x1)
237 local z = pr:next(z0, z1)
238 -- Find ground level (0...15)
241 if minetest.env:get_node({x=x,y=y,z=z}).name ~= "air" then
246 -- If desert sand, make cactus
247 if ground_y and minetest.env:get_node({x=x,y=ground_y,z=z}).name == "default:desert_sand" then
248 default.make_cactus({x=x,y=ground_y+1,z=z}, pr:next(3, 4))
254 local perlin1 = minetest.env:get_perlin(329, 3, 0.6, 100)
255 -- Assume X and Z lengths are equal
257 local divs = (maxp.x-minp.x)/divlen+1;
260 local x0 = minp.x + math.floor((divx+0)*divlen)
261 local z0 = minp.z + math.floor((divz+0)*divlen)
262 local x1 = minp.x + math.floor((divx+1)*divlen)
263 local z1 = minp.z + math.floor((divz+1)*divlen)
264 -- Determine grass amount from perlin noise
265 local grass_amount = math.floor(perlin1:get2d({x=x0, y=z0}) ^ 3 * 9)
266 -- Find random positions for grass based on this random
267 local pr = PseudoRandom(seed+1)
268 for i=0,grass_amount do
269 local x = pr:next(x0, x1)
270 local z = pr:next(z0, z1)
271 -- Find ground level (0...15)
274 if minetest.env:get_node({x=x,y=y,z=z}).name ~= "air" then
281 local p = {x=x,y=ground_y+1,z=z}
282 local nn = minetest.env:get_node(p).name
283 -- Check if the node can be replaced
284 if minetest.registered_nodes[nn] and
285 minetest.registered_nodes[nn].buildable_to then
286 nn = minetest.env:get_node({x=x,y=ground_y,z=z}).name
287 -- If desert sand, add dry shrub
288 if nn == "default:desert_sand" then
289 minetest.env:set_node(p,{name="default:dry_shrub"})
291 -- If dirt with grass, add grass
292 elseif nn == "default:dirt_with_grass" then
293 minetest.env:set_node(p,{name="default:grass_"..pr:next(1, 5)})
303 -- Generate nyan cats
304 generate_nyancats(seed, minp, maxp)