VoxeLibre/mods/MAPGEN/mcl_structures/api.lua

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mcl_structures.registered_structures = {}
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local function generate_loot(pos, def, pr)
local hl = def.sidelen / 2
local p1 = vector.offset(pos,-hl,-hl,-hl)
local p2 = vector.offset(pos,hl,hl,hl)
for it,lt in pairs(def.loot) do
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)
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
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function mcl_structures.place_structure(pos, def, pr)
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if not def then return end
local logging = 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 bn = minetest.get_biome_name(minetest.get_biome_data(pos).biome)
local node_top = minetest.registered_biomes[bn].node_top
local node_fill = minetest.registered_biomes[bn].node_filler
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)
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
minetest.bulk_set_node(minetest.find_nodes_in_area(ground_p1,ground_p2,{"air","group:liquid"}),{name=node_top})
minetest.bulk_set_node(minetest.find_nodes_in_area(vector.offset(ground_p1,0,-1,0),vector.offset(ground_p2,0,-30,0),{"air","group:liquid"}),{name=node_fill})
else
if logging then
minetest.log("warning","[mcl_structures] "..def.name.." at "..minetest.pos_to_string(pos).." not placed. No solid ground.")
end
return false
end
end
end
if def.on_place and not def.on_place(pos,def,pr) then
if logging then
minetest.log("warning","[mcl_structures] "..def.name.." at "..minetest.pos_to_string(pos).." not placed. Conditions not satisfied.")
end
return false
end
if def.filenames then
table.shuffle(def.filenames)
local file = def.filenames[1]
if file then
local ap = function(pos,def,pr) end
if def.after_place then ap = def.after_place end
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mcl_structures.place_schematic(pp, file, "random", nil, true, "place_center_x,place_center_z",function(p)
if def.loot then generate_loot(pos,def,pr) end
return ap(pos,def,pr)
end,pr)
if logging then
minetest.log("action","[mcl_structures] "..def.name.." placed at "..minetest.pos_to_string(pos))
end
return true
end
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elseif def.place_func and def.place_func(pos,def,pr) then
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if not def.after_place or ( def.after_place and def.after_place(pos,def,pr) ) then
if logging then
minetest.log("action","[mcl_structures] "..def.name.." placed at "..minetest.pos_to_string(pos))
end
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return true
end
end
if logging 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
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
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})
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
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
})