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MineClone2/mods/MAPGEN/mcl_dungeons/init.lua

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-- FIXME: Rarely, dungoens can overlap and destroy each other
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-- FIXME: Rarely, if chests spawn as neighbors in a corner, the corner chest might face not outward
-- TODO: Add monster spawner
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local pr = PseudoRandom(os.time())
-- Get loot for dungeon chests
local get_loot = function()
local items = mcl_loot.get_multi_loot({
{
stacks_min = 1,
stacks_max = 3,
items = {
{ itemstring = "mobs:nametag", weight = 20 },
{ itemstring = "mcl_mobitems:saddle", weight = 20 },
{ itemstring = "mcl_jukebox:record_1", weight = 15 },
{ itemstring = "mcl_jukebox:record_4", weight = 15 },
-- TODO: Iron Horse Armor
{ itemstring = "mcl_core:iron_ingot", weight = 15 },
{ itemstring = "mcl_core:apple_gold", weight = 15 },
-- TODO: Enchanted Book
{ itemstring = "mcl_books:book", weight = 10 },
-- TODO: Gold Horse Armor
{ itemstring = "mcl_core:gold_ingot", weight = 5 },
-- TODO: Diamond Horse Armor
{ itemstring = "mcl_core:diamond", weight = 5 },
-- TODO: Enchanted Golden Apple
{ itemstring = "mcl_core:apple_gold", weight = 2 },
}
},
{
stacks_min = 1,
stacks_max = 4,
items = {
{ itemstring = "mcl_farming:wheat_item", weight = 20, amount_min = 1, amount_max = 4 },
{ itemstring = "mcl_farming:bread", weight = 20 },
{ itemstring = "mcl_core:coal_lump", weight = 15, amount_min = 1, amount_max = 4 },
{ itemstring = "mesecons:redstone", weight = 15, amount_min = 1, amount_max = 4 },
{ itemstring = "mcl_farming:beetroot_seeds", weight = 10, amount_min = 2, amount_max = 4 },
{ itemstring = "mcl_farming:melon_seeds", weight = 10, amount_min = 2, amount_max = 4 },
{ itemstring = "mcl_farming:pumpkin_seeds", weight = 10, amount_min = 2, amount_max = 4 },
{ itemstring = "mcl_core:iron_ingot", weight = 10, amount_min = 1, amount_max = 4 },
{ itemstring = "bucket:bucket_empty", weight = 10 },
{ itemstring = "mcl_core:gold_ingot", weight = 5, amount_min = 1, amount_max = 4 },
},
},
{
stacks_min = 3,
stacks_max = 3,
items = {
{ itemstring = "mcl_mobitems:bone", weight = 10, amount_min = 1, amount_max = 8 },
{ itemstring = "mcl_mobitems:gunpowder", weight = 10, amount_min = 1, amount_max = 8 },
{ itemstring = "mcl_mobitems:rotten_flesh", weight = 10, amount_min = 1, amount_max = 8 },
{ itemstring = "mcl_mobitems:string", weight = 10, amount_min = 1, amount_max = 8 },
},
}}, pr)
return items
end
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-- Buffer for LuaVoxelManip
local lvm_buffer = {}
local lvm_buffer2 = {} -- for param2
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-- Below the bedrock, generate air/void
minetest.register_on_generated(function(minp, maxp)
if maxp.y < mcl_vars.mg_overworld_min or minp.y > mcl_vars.mg_overworld_max then
return
end
local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
local data = vm:get_data(lvm_buffer)
local area = VoxelArea:new({MinEdge=emin, MaxEdge=emax})
local lvm_used = false
local c_air = minetest.get_content_id("air")
local c_cobble = minetest.get_content_id("mcl_core:cobble")
local c_mossycobble = minetest.get_content_id("mcl_core:mossycobble")
local c_chest = minetest.get_content_id("mcl_chests:chest")
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-- Remember chest positions to set metadata later
local chest_posses = {}
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-- Calculate the number of dungeon spawn attempts
local sizevector = vector.subtract(maxp, minp)
sizevector = vector.add(sizevector, 1)
local chunksize = sizevector.x * sizevector.y * sizevector.z
-- In Minecraft, there 8 dungeon spawn attempts Minecraft chunk (16*256*16 = 65536 blocks).
-- Minetest chunks don't have this size, so scale the number accordingly.
local attempts = math.ceil(chunksize / 65536 * 8)
for a=1, attempts do
local x, y, z
local b = 7 -- buffer
x = math.random(minp.x+b, maxp.x-b)
local ymin = math.min(mcl_vars.mg_overworld_max, math.max(minp.y, mcl_vars.mg_bedrock_overworld_max) + 7)
local ymax = math.min(mcl_vars.mg_overworld_max, math.max(maxp.y, mcl_vars.mg_bedrock_overworld_max) - 4)
y = math.random(ymin, ymax)
z = math.random(minp.z+b, maxp.z-b)
local dungeonsizes = {
{ x=5, y=4, z=5},
{ x=5, y=4, z=7},
{ x=7, y=4, z=5},
{ x=7, y=4, z=7},
}
local dim = dungeonsizes[math.random(1, #dungeonsizes)]
-- Check floor and ceiling: Must be *completely* solid
local ceilingfloor_ok = true
for tx = x, x+dim.x do
for tz = z, z+dim.z do
local floor = minetest.get_name_from_content_id(data[area:index(tx, y, tz)])
local ceiling = minetest.get_name_from_content_id(data[area:index(tx, y+dim.y+1, tz)])
if (not minetest.registered_nodes[floor].walkable) or (not minetest.registered_nodes[ceiling].walkable) then
ceilingfloor_ok = false
break
end
end
if not ceilingfloor_ok then break end
end
-- Check for air openings (2 stacked air at ground level) in wall positions
local openings = 0
if ceilingfloor_ok then
local walls = {
{ x, x+dim.x+1, "x", "z", z },
{ x, x+dim.x+1, "x", "z", z+dim.z+1 },
{ z+1, z+dim.z, "z", "x", x },
{ z+1, z+dim.z, "z", "x", x+dim.x+1 },
}
for w=1, #walls do
local wall = walls[w]
for iter = wall[1], wall[2] do
local pos = {}
pos[wall[3]] = iter
pos[wall[4]] = wall[5]
pos.y = y+1
local door1 = area:index(pos.x, pos.y, pos.z)
pos.y = y+2
local door2 = area:index(pos.x, pos.y, pos.z)
local doorname1 = minetest.get_name_from_content_id(data[door1])
local doorname2 = minetest.get_name_from_content_id(data[door2])
if doorname1 == "air" and doorname2 == "air" then
openings = openings + 1
end
end
end
end
-- Check conditions. If okay, start generating
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if ceilingfloor_ok and openings >= 1 and openings <= 5 then
-- Okay! Spawning starts!
-- First prepare random chest positions.
-- Chests spawn at wall
-- We assign each position at the wall a number and each chest gets one of these numbers randomly
local totalChests = 2 -- this code strongly relies on this number being 2
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local totalChestSlots = (dim.x-1) * (dim.z-1)
local chestSlots = {}
-- There is a small chance that both chests have the same slot.
-- In that case, we give a 2nd chance for the 2nd chest to get spawned.
-- If it failed again, tough luck! We stick with only 1 chest spawned.
local lastRandom
local secondChance = true -- second chance is still available
for i=1, totalChests do
local r = math.random(1, totalChestSlots)
if r == lastRandom and secondChance then
-- Oops! Same slot selected. Try again.
r = math.random(1, totalChestSlots)
secondChance = false
end
lastRandom = r
table.insert(chestSlots, r)
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end
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table.sort(chestSlots)
local currentChest = 1
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-- Ceiling and floor
local maxx, maxy, maxz = x+dim.x+1, y+dim.y+1, z+dim.z+1
local chestSlotCounter = 1
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for tx = x, maxx do
for tz = z, maxz do
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for ty = y, maxy do
local p_pos = area:index(tx, ty, tz)
-- Floor
if ty == y then
if math.random(1,4) == 1 then
data[p_pos] = c_cobble
else
data[p_pos] = c_mossycobble
end
-- Wall or ceiling
elseif ty == maxy or (ty > y and (tx == x or tx == maxx) or (tz == z or tz == maxz)) then
data[p_pos] = c_cobble
-- Room interiour
else
local forChest = ty==y+1 and (tx==x+1 or tx==maxx-1 or tz==z+1 or tz==maxz-1)
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-- Place next chest at the wall (if it was its chosen wall slot)
if forChest and (currentChest < totalChests + 1) and (chestSlots[currentChest] == chestSlotCounter) then
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local p2
-- Select rotation so the chest faces away from wall
if (tx==x+1) then p2 = 3
elseif (tx==maxx-1) then p2 = 1
elseif (tz==z+1) then p2 = 2
else p2 = 0 end
table.insert(chest_posses, {x=tx, y=ty, z=tz})
currentChest = currentChest + 1
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else
data[p_pos] = c_air
end
if forChest then
chestSlotCounter = chestSlotCounter + 1
end
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end
end
end
end
end
lvm_used = true
end
if lvm_used then
local chest_param2 = {}
-- Determine correct chest rotation (must pointi outwards)
for c=1, #chest_posses do
local cpos = chest_posses[c]
-- Check surroundings of chest to determine correct rotation
local surround_vectors = {
{ x=-1, y=0, z=0 },
{ x=1, y=0, z=0 },
{ x=0, y=0, z=-1 },
{ x=0, y=0, z=1 },
}
local surroundings = {}
for s=1, #surround_vectors do
-- Detect the 4 horizontal neighbors
local spos = vector.add(cpos, surround_vectors[s])
local wpos = vector.subtract(cpos, surround_vectors[s])
local p_pos = area:index(spos.x, spos.y, spos.z)
local p_pos2 = area:index(wpos.x, wpos.y, wpos.z)
local nodename = minetest.get_name_from_content_id(data[p_pos])
local nodename2 = minetest.get_name_from_content_id(data[p_pos2])
local nodedef = minetest.registered_nodes[nodename]
local nodedef2 = minetest.registered_nodes[nodename2]
-- The chest needs an open space in front of it and a walkable node (except chest) behind it
if nodedef and nodedef.walkable == false and nodedef2 and nodedef2.walkable == true and nodename2 ~= "mcl_chests:chest" then
table.insert(surroundings, spos)
end
end
-- Set param2 (=facedir) of this chest
local facedir
if #surroundings <= 0 then
-- Fallback if chest ended up in the middle of a room for some reason
facedir = math.random(0, 0)
else
-- 1 or multiple possible open directions: Choose random facedir
local face_to = surroundings[math.random(1, #surroundings)]
facedir = minetest.dir_to_facedir(vector.subtract(cpos, face_to))
end
chest_param2[c] = facedir
end
-- Actually generate the dungeon all at once (except the chests and the spawner)
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vm:set_data(data)
vm:calc_lighting()
vm:update_liquids()
vm:write_to_map()
-- Chests are placed seperately
for c=1, #chest_posses do
local cpos = chest_posses[c]
minetest.set_node(cpos, {name="mcl_chests:chest", param2=chest_param2[c]})
local meta = minetest.get_meta(cpos)
local inv = meta:get_inventory()
local items = get_loot()
for i=1, math.min(#items, inv:get_size("main")) do
inv:set_stack("main", i, ItemStack(items[i]))
end
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end
end
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end)