VoxeLibre/mods/ITEMS/mcl_bamboo/mapgen.lua

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local item_water, item_dirt, item_grass
item_water = "mcl_core:water_source"
item_dirt = "mcl_core:dirt"
item_grass = "mcl_core:dirt_with_grass"
local function make_bamboo(pos, size)
for y = 0, size - 1 do
local p = {x = pos.x, y = pos.y + y, z = pos.z}
if minetest.get_node(p).name ~= "air" then
return
end
minetest.set_node(p, {name = "mcl_bamboo:bamboo"})
end
end
minetest.register_on_generated(function(minp, maxp, seed)
if maxp.y < 2 and minp.y > 0 then
return
end
local c_grass = minetest.get_content_id(item_grass)
local n_bamboo = minetest.get_perlin(8234, 3, 0.6, 100)
local vm = minetest.get_voxel_manip()
local emin, emax = vm:read_from_map(minp, maxp)
local area = VoxelArea:new {MinEdge = emin, MaxEdge = emax}
local data = vm:get_data()
local rand = PseudoRandom(seed % 8000)
for z = minp.z + 2, maxp.z - 2, 4 do
for x = minp.x + 2, maxp.x - 2, 4 do
local bamboo_amount = math.floor(n_bamboo:get_2d({x = x, y = z}) * 7 - 3)
for i = 1, bamboo_amount do
local p_pos = {
x = rand:next(x - 2, x + 2),
y = 0,
z = rand:next(z - 2, z + 2)
}
local found = false
local node = -1
for y = 4, 0, -1 do
p_pos.y = y
node = data[area:index(p_pos.x, p_pos.y, p_pos.z)]
if node == c_grass then
found = true
break
end
end
if found and
minetest.find_node_near(p_pos, 5, {"group:water", item_water}) then
p_pos.y = p_pos.y + 1
make_bamboo(p_pos, rand:next(4, 12))
end
end
end
end
end
)