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-- Ore generation
local function generate_ore(name, wherein, minp, maxp, seed, chunks_per_volume, ore_per_chunk, height_min, height_max)
if maxp.y < height_min or minp.y > height_max then
return
end
local y_min = math.max(minp.y, height_min)
local y_max = math.min(maxp.y, height_max)
local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
local pr = PseudoRandom(seed)
local num_chunks = math.floor(chunks_per_volume * volume)
local chunk_size = 3
if ore_per_chunk <= 4 then
chunk_size = 2
end
local inverse_chance = math.floor(chunk_size*chunk_size*chunk_size / ore_per_chunk)
--print("generate_ore num_chunks: "..dump(num_chunks))
for i=1,num_chunks do
if (y_max-chunk_size+1 <= y_min) then return end
local y0 = pr:next(y_min, y_max-chunk_size+1)
if y0 >= height_min and y0 <= height_max then
local x0 = pr:next(minp.x, maxp.x-chunk_size+1)
local z0 = pr:next(minp.z, maxp.z-chunk_size+1)
local p0 = {x=x0, y=y0, z=z0}
for x1=0,chunk_size-1 do
for y1=0,chunk_size-1 do
for z1=0,chunk_size-1 do
if pr:next(1,inverse_chance) == 1 then
local x2 = x0+x1
local y2 = y0+y1
local z2 = z0+z1
local p2 = {x=x2, y=y2, z=z2}
if minetest.env:get_node(p2).name == wherein then
minetest.env:set_node(p2, {name=name})
end
end
end
end
end
end
end
--print("generate_ore done")
end
minetest.register_on_generated(function(minp, maxp, seed)
math.randomseed(os.time())
local current_seed = seed + math.random(1,1000)
local function get_next_seed()
current_seed = current_seed + 1
return current_seed
end
generate_ore("moreores:mineral_copper", "default:stone", minp, maxp, seed+16, 1/25/25/25, 4, -31000, 64)
generate_ore("moreores:mineral_tin", "default:stone", minp, maxp, seed+17, 1/15/15/15, 2, -31000, 8)
generate_ore("moreores:mineral_silver", "default:stone", minp, maxp, seed+18, 1/17/17/17, 5, -31000, 2)
generate_ore("moreores:mineral_gold", "default:stone", minp, maxp, seed+19, 1/20/20/20, 3, -31000, -64)
generate_ore("moreores:mineral_lead", "default:stone", minp, maxp, seed+21, 1/25/25/25, 2, -31000, -256)
generate_ore("moreores:mineral_electrum", "default:stone", minp, maxp, seed+20, 1/15/15/15, 1, -31000,
end)
