VoxeLibre/mods/MAPGEN/mcl_structures/api.lua

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mcl_structures.registered_structures = {}
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local rotations = {
"0",
"90",
"180",
"270"
}
local place_queue = {}
local disabled_structures = minetest.settings:get("mcl_disabled_structures")
if disabled_structures then disabled_structures = disabled_structures:split(",")
else disabled_structures = {} end
local logging = minetest.settings:get_bool("mcl_logging_structures",true)
local rotations = {
"0",
"90",
"180",
"270"
}
function mcl_structures.is_disabled(structname)
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return table.indexof(disabled_structures,structname) ~= -1
end
local function ecb_place(blockpos, action, calls_remaining, param)
if calls_remaining >= 1 then return end
minetest.place_schematic(param.pos, param.schematic, param.rotation, param.replacements, param.force_placement, param.flags)
if param.after_placement_callback and param.p1 and param.p2 then
param.after_placement_callback(param.p1, param.p2, param.size, param.rotation, param.pr, param.callback_param)
end
end
function mcl_structures.place_schematic(pos, schematic, rotation, replacements, force_placement, flags, after_placement_callback, pr, callback_param)
local s = loadstring(minetest.serialize_schematic(schematic, "lua", {lua_use_comments = false, lua_num_indent_spaces = 0}) .. " return schematic")()
if s and s.size then
local x, z = s.size.x, s.size.z
if rotation then
if rotation == "random" and pr then
rotation = rotations[pr:next(1,#rotations)]
end
if rotation == "random" then
x = math.max(x, z)
z = x
elseif rotation == "90" or rotation == "270" then
x, z = z, x
end
end
local p1 = {x=pos.x , y=pos.y , z=pos.z }
local p2 = {x=pos.x+x-1, y=pos.y+s.size.y-1, z=pos.z+z-1}
minetest.log("verbose", "[mcl_structures] size=" ..minetest.pos_to_string(s.size) .. ", rotation=" .. tostring(rotation) .. ", emerge from "..minetest.pos_to_string(p1) .. " to " .. minetest.pos_to_string(p2))
local param = {pos=vector.new(pos), schematic=s, rotation=rotation, replacements=replacements, force_placement=force_placement, flags=flags, p1=p1, p2=p2, after_placement_callback = after_placement_callback, size=vector.new(s.size), pr=pr, callback_param=callback_param}
minetest.emerge_area(p1, p2, ecb_place, param)
return true
end
end
function mcl_structures.get_struct(file)
local localfile = modpath.."/schematics/"..file
local file, errorload = io.open(localfile, "rb")
if errorload then
minetest.log("error", "[mcl_structures] Could not open this struct: "..localfile)
return nil
end
local allnode = file:read("*a")
file:close()
return allnode
end
-- Call on_construct on pos.
-- Useful to init chests from formspec.
local function init_node_construct(pos)
local node = minetest.get_node(pos)
local def = minetest.registered_nodes[node.name]
if def and def.on_construct then
def.on_construct(pos)
return true
end
return false
end
mcl_structures.init_node_construct = init_node_construct
function mcl_structures.fill_chests(p1,p2,loot,pr)
for it,lt in pairs(loot) do
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local nodes = minetest.find_nodes_in_area(p1, p2, it)
for _,p in pairs(nodes) do
local lootitems = mcl_loot.get_multi_loot(lt, pr)
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mcl_structures.init_node_construct(p)
local meta = minetest.get_meta(p)
local inv = meta:get_inventory()
mcl_loot.fill_inventory(inv, "main", lootitems, pr)
end
end
end
local function generate_loot(pos, def, pr)
local hl = def.sidelen
local p1 = vector.offset(pos,-hl,-hl,-hl)
local p2 = vector.offset(pos,hl,hl,hl)
if def.loot then mcl_structures.fill_chests(p1,p2,def.loot,pr) end
end
function mcl_structures.construct_nodes(p1,p2,nodes)
local nn=minetest.find_nodes_in_area(p1,p2,nodes)
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for _,p in pairs(nn) do
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mcl_structures.init_node_construct(p)
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end
end
local function construct_nodes(pos,def,pr)
return mcl_structures.construct_nodes(vector.offset(pos,-def.sidelen/2,0,-def.sidelen/2),vector.offset(pos,def.sidelen/2,def.sidelen,def.sidelen/2))
end
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function mcl_structures.find_lowest_y(pp)
local y = 31000
for _,p in pairs(pp) do
if p.y < y then y = p.y end
end
return y
end
function mcl_structures.find_highest_y(pp)
local y = -31000
for _,p in pairs(pp) do
if p.y > y then y = p.y end
end
return y
end
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local function smooth_cube(nn,pos,plane,amnt)
local r = {}
local amnt = amnt or 9
table.sort(nn,function(a, b)
if false or plane then
return vector.distance(vector.new(pos.x,0,pos.z), vector.new(a.x,0,a.z)) < vector.distance(vector.new(pos.x,0,pos.z), vector.new(b.x,0,b.z))
else
return vector.distance(pos, a) < vector.distance(pos, b)
end
end)
for i=1,math.max(1,#nn-amnt) do table.insert(r,nn[i]) end
return r
end
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local function find_ground(pos,nn,gn)
local r = 0
for _,v in pairs(nn) do
local p=vector.new(v)
repeat
local n = minetest.get_node(p).name
p = vector.offset(p,0,-1,0)
until not n or n == "mcl_core:bedrock" or n == "ignore" or n == gn
--minetest.log(tostring(pos.y - p.y))
if pos.y - p.y > r then r = pos.y - p.y end
end
return r
end
local function get_foundation_nodes(ground_p1,ground_p2,pos,sidelen,node_stone)
local replace = {"air","group:liquid","mcl_core:snow","group:tree","group:leaves","group:plant","grass_block","group:dirt"}
local depth = find_ground(pos,minetest.find_nodes_in_area(ground_p1,ground_p2,replace),node_stone)
local nn = smooth_cube(minetest.find_nodes_in_area(vector.offset(ground_p1,0,-1,0),vector.offset(ground_p2,0,-depth,0),replace),vector.offset(pos,0,-depth,0),true,sidelen * 64)
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local stone = {}
local filler = {}
local top = {}
local dust = {}
for l,v in pairs(nn) do
if v.y == ground_p1.y - 1 then
table.insert(filler,v)
table.insert(top,vector.offset(v,0,1,0))
table.insert(dust,vector.offset(v,0,2,0))
elseif v.y < ground_p1.y -1 and v.y > ground_p2.y -4 then table.insert(filler,v)
elseif v.y < ground_p2.y - 3 and v.y > ground_p2.y -5 then
if math.random(3) == 1 then
table.insert(filler,v)
else
table.insert(stone,v)
end
else
table.insert(stone,v)
end
end
return stone,filler,top,dust
end
local function foundation(ground_p1,ground_p2,pos,sidelen)
local node_stone = "mcl_core:stone"
local node_filler = "mcl_core:dirt"
local node_top = "mcl_core:dirt_with_grass" or minetest.get_node(ground_p1).name
local node_dust = nil
if minetest.get_mapgen_setting("mg_name") ~= "v6" then
local b = minetest.registered_biomes[minetest.get_biome_name(minetest.get_biome_data(pos).biome)]
--minetest.log(dump(b.node_top))
if b then
if b.node_top then node_top = b.node_top end
if b.node_filler then node_filler = b.node_filler end
if b.node_stone then node_stone = b.node_stone end
if b.node_dust then node_dust = b.node_dust end
end
end
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local stone,filler,top,dust = get_foundation_nodes(ground_p1,ground_p2,pos,sidelen,node_stone)
minetest.bulk_set_node(top,{name=node_top},node_stone)
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if node_dust then
minetest.bulk_set_node(dust,{name=node_dust})
end
minetest.bulk_set_node(filler,{name=node_filler})
minetest.bulk_set_node(stone,{name=node_stone})
end
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local function process_queue()
if #place_queue < 1 then return end
local s = table.remove(place_queue)
mcl_structures.place_schematic(s.pos, s.file, s.rot, nil, true, "place_center_x,place_center_z",function(s)
if s.after_place then
s.after_place(s.pos,s.def,s.pr)
end
end,s.pr)
minetest.after(0.5,process_queue)
end
function mcl_structures.place_structure(pos, def, pr, blockseed)
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if not def then return end
if not rot then rot = "random" end
local log_enabled = logging and not def.terrain_feature
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local y_offset = 0
if type(def.y_offset) == "function" then
y_offset = def.y_offset(pr)
elseif def.y_offset then
y_offset = def.y_offset
end
local pp = vector.offset(pos,0,y_offset,0)
if def.solid_ground and def.sidelen then
local ground_p1 = vector.offset(pos,-def.sidelen/2,-1,-def.sidelen/2)
local ground_p2 = vector.offset(pos,def.sidelen/2,-1,def.sidelen/2)
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local solid = minetest.find_nodes_in_area(ground_p1,ground_p2,{"group:solid"})
if #solid < ( def.sidelen * def.sidelen ) then
if def.make_foundation then
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foundation(vector.offset(pos,-def.sidelen/2 - 3,-1,-def.sidelen/2 - 3),vector.offset(pos,def.sidelen/2 + 3,-1,def.sidelen/2 + 3),pos,def.sidelen)
else
if log_enabled then
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minetest.log("warning","[mcl_structures] "..def.name.." at "..minetest.pos_to_string(pp).." not placed. No solid ground.")
end
return false
end
end
end
if def.on_place and not def.on_place(pos,def,pr,blockseed) then
if log_enabled then
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minetest.log("warning","[mcl_structures] "..def.name.." at "..minetest.pos_to_string(pp).." not placed. Conditions not satisfied.")
end
return false
end
if def.filenames then
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if #def.filenames <= 0 then return false end
local r = pr:next(1,#def.filenames)
local file = def.filenames[r]
if file then
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local rot = rotations[pr:next(1,#rotations)]
local ap = function(pos,def,pr,blockseed) end
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if def.daughters then
for _,d in pairs(def.daughters) do
local p = vector.add(pp,d.pos)
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ap = function(pos,def,pr,blockseed)
mcl_structures.place_schematic(pos, d.files[pr:next(1,#d.files)], rot, nil, true, "place_center_x,place_center_z",function()
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if def.loot then generate_loot(pp,def,pr,blockseed) end
if def.construct_nodes then construct_nodes(pp,def,pr,blockseed) end
if def.after_place then
def.after_place(pos,def,pr)
end
end,pr)
end
end
elseif def.after_place then ap = def.after_place
end
mcl_structures.place_schematic(pp, file, rot, def.replacements, true, "place_center_x,place_center_z",function(p1, p2, size, rotation)
if not def.daughters then
if def.loot then generate_loot(pp,def,pr,blockseed) end
if def.construct_nodes then construct_nodes(pp,def,pr,blockseed) end
return ap(pp,def,pr,blockseed,p1,p2,size,rotation)
end
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end,pr)
if log_enabled then
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minetest.log("action","[mcl_structures] "..def.name.." placed at "..minetest.pos_to_string(pp))
end
return true
end
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elseif def.place_func and def.place_func(pp,def,pr,blockseed) then
if not def.after_place or ( def.after_place and def.after_place(pp,def,pr,blockseed) ) then
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if def.loot then generate_loot(pp,def,pr,blockseed) end
if def.construct_nodes then construct_nodes(pp,def,pr,blockseed) end
if log_enabled then
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minetest.log("action","[mcl_structures] "..def.name.." placed at "..minetest.pos_to_string(pp))
end
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return true
end
end
if log_enabled then
minetest.log("warning","[mcl_structures] placing "..def.name.." failed at "..minetest.pos_to_string(pos))
end
end
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function mcl_structures.register_structure(name,def,nospawn) --nospawn means it will be placed by another (non-nospawn) structure that contains it's structblock i.e. it will not be placed by mapgen directly
if mcl_structures.is_disabled(name) then return end
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local structblock = "mcl_structures:structblock_"..name
local flags = "place_center_x, place_center_z, force_placement"
local y_offset = 0
local sbgroups = { structblock = 1, not_in_creative_inventory=1 }
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if def.flags then flags = def.flags end
def.name = name
if nospawn then
sbgroups.structblock = nil
sbgroups.structblock_lbm = 1
else
if def.place_on then
minetest.register_on_mods_loaded(function() --make sure all previous decorations and biomes have been registered
def.deco = minetest.register_decoration({
name = "mcl_structures:deco_"..name,
decoration = structblock,
deco_type = "simple",
place_on = def.place_on,
spawn_by = def.spawn_by,
num_spawn_by = def.num_spawn_by,
sidelen = 80,
fill_ratio = def.fill_ratio,
noise_params = def.noise_params,
flags = flags,
biomes = def.biomes,
y_max = def.y_max,
y_min = def.y_min
})
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minetest.register_node(":"..structblock, {drawtype="airlike", walkable = false, pointable = false,groups = sbgroups,sunlight_propagates = true,})
def.structblock = structblock
def.deco_id = minetest.get_decoration_id("mcl_structures:deco_"..name)
minetest.set_gen_notify({decoration=true}, { def.deco_id })
--catching of gennotify happens in mcl_mapgen_core
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end)
end
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end
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mcl_structures.registered_structures[name] = def
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end
--lbm for secondary structures (structblock included in base structure)
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minetest.register_lbm({
name = "mcl_structures:struct_lbm",
run_at_every_load = true,
nodenames = {"group:structblock_lbm"},
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action = function(pos, node)
minetest.remove_node(pos)
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local name = node.name:gsub("mcl_structures:structblock_","")
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local def = mcl_structures.registered_structures[name]
if not def then return end
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mcl_structures.place_structure(pos)
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end
})