forked from VoxeLibre/VoxeLibre
389 lines
12 KiB
Lua
389 lines
12 KiB
Lua
mcl_spawn = {}
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local S = minetest.get_translator("mcl_spawn")
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local mg_name = minetest.get_mapgen_setting("mg_name")
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local storage = minetest.get_mod_storage()
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-- Parameters
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-------------
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local respawn_search_interval = 30 -- seconds
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local respawn_search_initial_delay = 30 -- seconds
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local node_groups_white_list = {"group:soil"}
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local biomes_white_list = {
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"ColdTaiga",
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"Taiga",
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"MegaTaiga",
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"MegaSpruceTaiga",
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"Plains",
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"SunflowerPlains",
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"Forest",
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"FlowerForest",
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"BirchForest",
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"BirchForestM",
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"Jungle",
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"JungleM",
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"JungleEdge",
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"JungleEdgeM",
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"Savanna",
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"SavannaM",
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}
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-- Resolution of search grid in nodes.
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local res = 64
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local half_res = 32 -- for emerge areas around the position
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local alt_min = -10
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local alt_max = 200
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-- Number of points checked in the square search grid (edge * edge).
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local checks = 128 * 128
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-- Starting point for biome checks. This also sets the y co-ordinate for all
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-- points checked, so the suitable biomes must be active at this y.
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local start_pos = minetest.setting_get_pos("static_spawnpoint") or {x = 0, y = 8, z = 0}
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-- Table of suitable biomes
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local biome_ids = {}
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-- Bed spawning offsets
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local node_search_list =
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{
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--[[1]] {x = 0, y = 0, z = -1}, --
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--[[2]] {x = -1, y = 0, z = 0}, --
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--[[3]] {x = -1, y = 0, z = 1}, --
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--[[4]] {x = 0, y = 0, z = 2}, -- z^ 8 4 9
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--[[5]] {x = 1, y = 0, z = 1}, -- | 3 5
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--[[6]] {x = 1, y = 0, z = 0}, -- | 2 * 6
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--[[7]] {x = -1, y = 0, z = -1}, -- | 7 1 A
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--[[8]] {x = -1, y = 0, z = 2}, -- +----->
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--[[9]] {x = 1, y = 0, z = 2}, -- x
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--[[A]] {x = 1, y = 0, z = -1}, --
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--[[B]] {x = 0, y = 1, z = 0}, --
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--[[C]] {x = 0, y = 1, z = 1}, --
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}
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-- End of parameters
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--------------------
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-- Initial variables
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local success = storage:get_int("mcl_spawn_success")==1
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local searched = (storage:get_int("mcl_spawn_searched")==1) or mg_name == "v6" or mg_name == "singlenode" or minetest.settings:get("static_spawnpoint")
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local wsp = minetest.string_to_pos(storage:get_string("mcl_spawn_world_spawn_point")) or {} -- world spawn position
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local check = storage:get_int("mcl_spawn_check") or 0
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local cp = minetest.string_to_pos(storage:get_string("mcl_spawn_cp")) or {x=start_pos.x, y=start_pos.y, z=start_pos.z}
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local edge_len = storage:get_int("mcl_spawn_edge_len") or 1
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local edge_dist = storage:get_int("mcl_spawn_edge_dist") or 0
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local dir_step = storage:get_int("mcl_spawn_dir_step") or 0
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local dir_ind = storage:get_int("mcl_spawn_dir_ind") or 1
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-- Get world 'mapgen_limit' and 'chunksize' to calculate 'spawn_limit'.
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-- This accounts for how mapchunks are not generated if they or their shell exceed
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-- 'mapgen_limit'.
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local mapgen_limit = tonumber(minetest.get_mapgen_setting("mapgen_limit"))
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local chunksize = tonumber(minetest.get_mapgen_setting("chunksize"))
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local spawn_limit = math.max(mapgen_limit - (chunksize + 1) * 16, 0)
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--Functions
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-----------
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local function get_far_node(pos)
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local node = minetest.get_node(pos)
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if node.name ~= "ignore" then
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return node
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end
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minetest.get_voxel_manip():read_from_map(pos, pos)
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return minetest.get_node(pos)
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end
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local function good_for_respawn(pos, player)
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local pos0 = {x = pos.x, y = pos.y - 1, z = pos.z}
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local pos1 = {x = pos.x, y = pos.y, z = pos.z}
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local pos2 = {x = pos.x, y = pos.y + 1, z = pos.z}
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local node0 = get_far_node(pos0)
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local node1 = get_far_node(pos1)
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local node2 = get_far_node(pos2)
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local nn0, nn1, nn2 = node0.name, node1.name, node2.name
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if minetest.get_item_group(nn0, "destroys_items") ~=0
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or minetest.get_item_group(nn1, "destroys_items") ~=0
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or minetest.get_item_group(nn2, "destroys_items") ~=0
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or minetest.get_item_group(nn0, "portal") ~=0
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or minetest.get_item_group(nn1, "portal") ~=0
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or minetest.get_item_group(nn2, "portal") ~=0
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or minetest.is_protected(pos0, player or "")
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or minetest.is_protected(pos1, player or "")
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or minetest.is_protected(pos2, player or "")
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or (not player and minetest.get_node_light(pos1, 0.5) < 8)
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or (not player and minetest.get_node_light(pos2, 0.5) < 8)
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then
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return false
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end
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local def0 = minetest.registered_nodes[nn0]
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local def1 = minetest.registered_nodes[nn1]
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local def2 = minetest.registered_nodes[nn2]
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return def0.walkable and (not def1.walkable) and (not def2.walkable) and
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(def1.damage_per_second == nil or def2.damage_per_second <= 0) and
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(def1.damage_per_second == nil or def2.damage_per_second <= 0)
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end
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local function can_find_tree(pos1)
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local trees = minetest.find_nodes_in_area(vector.subtract(pos1,half_res), vector.add(pos1,half_res), {"group:tree"}, false)
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for _, pos2 in ipairs(trees) do
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if not minetest.is_protected(pos2, "") then
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if pos2.x < pos1.x then
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pos2.x = pos2.x + 1
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elseif pos2.x > pos1.x then
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pos2.x = pos2.x - 1
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end
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if pos2.z < pos1.z then
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pos2.z = pos2.z + 1
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elseif pos2.z > pos1.z then
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pos2.z = pos2.z - 1
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end
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local way = minetest.find_path(pos1, pos2, res, 1, 3, "A*_noprefetch")
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if way then
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return true
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end
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end
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end
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return false
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end
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local function next_pos()
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if edge_dist >= edge_len then
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edge_dist = 1
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dir_ind = (dir_ind % 4) + 1
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dir_step = dir_step + 1
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edge_len = math.floor(dir_step / 2) + 1
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else
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edge_dist = edge_dist + 1
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end
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if dir_ind==1 then
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cp.z = cp.z + res
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elseif dir_ind==2 then
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cp.x = cp.x - res
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elseif dir_ind==3 then
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cp.z = cp.z - res
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else
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cp.x = cp.x + res
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end
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end
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-- Spawn position search
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local function next_biome()
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while check <= checks do
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local biome_data = minetest.get_biome_data(cp)
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-- Sometimes biome_data is nil
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local biome = biome_data and biome_data.biome
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if biome then
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minetest.log("verbose", "[mcl_spawn] Search white-listed biome at "..minetest.pos_to_string(cp)..": "..minetest.get_biome_name(biome))
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for _, biome_id in ipairs(biome_ids) do
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if biome == biome_id then
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cp.y = minetest.get_spawn_level(cp.x, cp.z) or start_pos.y
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if cp.y then
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wsp = {x = cp.x, y = cp.y, z = cp.z}
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return true
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end
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break
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end
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end
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end
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next_pos()
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-- Check for position being outside world edge
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if math.abs(cp.x) > spawn_limit or math.abs(cp.z) > spawn_limit then
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check = checks + 1
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return false
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end
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check = check + 1
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end
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return false
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end
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local function ecb_search_continue(blockpos, action, calls_remaining, param)
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if calls_remaining <= 0 then
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local pos1 = {x = wsp.x-half_res, y = alt_min, z = wsp.z-half_res}
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local pos2 = {x = wsp.x+half_res, y = alt_max, z = wsp.z+half_res}
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local nodes = minetest.find_nodes_in_area_under_air(pos1, pos2, node_groups_white_list)
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minetest.log("verbose", "[mcl_spawn] Data emerge callback: "..minetest.pos_to_string(wsp).." - "..tostring(nodes and #nodes) .. " node(s) found under air")
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if nodes then
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for i=1, #nodes do
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wsp = nodes[i]
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if wsp then
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wsp.y = wsp.y + 1
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if good_for_respawn(wsp) and can_find_tree(wsp) then
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minetest.log("action", "[mcl_spawn] Dynamic world spawn determined to be "..minetest.pos_to_string(wsp))
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searched = true
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success = true
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return
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end
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end
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end
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end
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next_pos()
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mcl_spawn.search()
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end
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end
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function mcl_spawn.search()
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if not next_biome() or check > checks then
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return false
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end
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check = check + 1
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if not wsp.y then
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wsp.y = 8
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end
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local pos1 = {x = wsp.x-half_res, y = alt_min, z = wsp.z-half_res}
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local pos2 = {x = wsp.x+half_res, y = alt_max, z = wsp.z+half_res}
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minetest.emerge_area(pos1, pos2, ecb_search_continue)
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end
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mcl_spawn.get_world_spawn_pos = function()
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if success then
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return wsp
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end
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minetest.log("action", "[mcl_spawn] Failed to determine dynamic world spawn!")
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return start_pos
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end
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-- Returns a spawn position of player.
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-- If player is nil or not a player, a world spawn point is returned.
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-- The second return value is true if returned spawn point is player-chosen,
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-- false otherwise.
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mcl_spawn.get_bed_spawn_pos = function(player)
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local spawn, custom_spawn = nil, false
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if player ~= nil and player:is_player() then
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local attr = player:get_meta():get_string("mcl_beds:spawn")
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if attr ~= nil and attr ~= "" then
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spawn = minetest.string_to_pos(attr)
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custom_spawn = true
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end
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end
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if not spawn or spawn == "" then
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spawn = mcl_spawn.get_world_spawn_pos()
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custom_spawn = false
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end
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return spawn, custom_spawn
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end
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-- Sets the player's spawn position to pos.
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-- Set pos to nil to clear the spawn position.
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-- If message is set, informs the player with a chat message when the spawn position
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-- changed.
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mcl_spawn.set_spawn_pos = function(player, pos, message)
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local spawn_changed = false
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local meta = player:get_meta()
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if pos == nil then
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if meta:get_string("mcl_beds:spawn") ~= "" then
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spawn_changed = true
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if message then
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minetest.chat_send_player(player:get_player_name(), S("Respawn position cleared!"))
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end
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end
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meta:set_string("mcl_beds:spawn", "")
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else
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local oldpos = minetest.string_to_pos(meta:get_string("mcl_beds:spawn"))
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meta:set_string("mcl_beds:spawn", minetest.pos_to_string(pos))
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if oldpos then
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-- We don't bother sending a message if the new spawn pos is basically the same
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spawn_changed = vector.distance(pos, oldpos) > 0.1
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else
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-- If it wasn't set and now it will be set, it means it is changed
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spawn_changed = true
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end
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if spawn_changed and message then
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minetest.chat_send_player(player:get_player_name(), S("New respawn position set!"))
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end
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end
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return spawn_changed
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end
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mcl_spawn.get_player_spawn_pos = function(player)
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local pos, custom_spawn = mcl_spawn.get_bed_spawn_pos(player)
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if pos and custom_spawn then
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-- Check if bed is still there
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local node_bed = get_far_node(pos)
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local bgroup = minetest.get_item_group(node_bed.name, "bed")
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if bgroup ~= 1 and bgroup ~= 2 then
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-- Bed is destroyed:
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if player ~= nil and player:is_player() then
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player:get_meta():set_string("mcl_beds:spawn", "")
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end
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minetest.chat_send_player(player:get_player_name(), S("Your spawn bed was missing or blocked."))
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return mcl_spawn.get_world_spawn_pos(), false
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end
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-- Find spawning position on/near the bed free of solid or damaging blocks iterating a square spiral 15x15:
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local dir = minetest.facedir_to_dir(minetest.get_node(pos).param2)
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local offset
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for _, o in ipairs(node_search_list) do
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if dir.z == -1 then
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offset = {x = o.x, y = o.y, z = o.z}
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elseif dir.z == 1 then
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offset = {x = -o.x, y = o.y, z = -o.z}
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elseif dir.x == -1 then
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offset = {x = o.z, y = o.y, z = -o.x}
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else -- dir.x == 1
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offset = {x = -o.z, y = o.y, z = o.x}
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end
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local player_spawn_pos = vector.add(pos, offset)
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if good_for_respawn(player_spawn_pos, player:get_player_name()) then
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return player_spawn_pos, true
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end
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end
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-- We here if we didn't find suitable place for respawn
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end
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return mcl_spawn.get_world_spawn_pos(), false
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end
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mcl_spawn.spawn = function(player)
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local pos, in_bed = mcl_spawn.get_player_spawn_pos(player)
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player:set_pos(pos)
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return in_bed or success
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end
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-- Respawn player at specified respawn position
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minetest.register_on_respawnplayer(mcl_spawn.spawn)
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function mcl_spawn.shadow_worker()
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if #biome_ids < 1 then
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for _, biome_name in pairs(biomes_white_list) do
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table.insert(biome_ids, minetest.get_biome_id(biome_name))
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end
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end
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if not searched then
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searched = true
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mcl_spawn.search()
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minetest.log("action", "[mcl_spawn] Started world spawn point search")
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end
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if success and ((not good_for_respawn(wsp)) or (not can_find_tree(wsp))) then
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success = false
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minetest.log("action", "[mcl_spawn] World spawn position isn't safe anymore: "..minetest.pos_to_string(wsp))
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mcl_spawn.search()
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end
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minetest.after(respawn_search_interval, mcl_spawn.shadow_worker)
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end
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minetest.after(respawn_search_initial_delay, mcl_spawn.shadow_worker)
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minetest.register_on_shutdown(function()
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storage:set_int("mcl_spawn_success", success and 1 or 0)
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storage:set_string("mcl_spawn_world_spawn_point", minetest.pos_to_string(wsp))
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storage:set_int("mcl_spawn_searched", searched and 1 or 0)
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storage:set_int("mcl_spawn_check", check)
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storage:set_string("mcl_spawn_cp", minetest.pos_to_string(cp))
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storage:set_int("mcl_spawn_edge_len", edge_len)
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storage:set_int("mcl_spawn_edge_dist", edge_dist)
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storage:set_int("mcl_spawn_dir_step", dir_step)
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storage:set_int("mcl_spawn_dir_ind", dir_ind)
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end
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)
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