mirror of https://github.com/minetest/minetest.git
80 lines
2.1 KiB
Lua
80 lines
2.1 KiB
Lua
-- Prevent anyone else accessing those functions
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local forceload_block = core.forceload_block
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local forceload_free_block = core.forceload_free_block
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core.forceload_block = nil
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core.forceload_free_block = nil
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local blocks_forceloaded
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local total_forceloaded = 0
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local BLOCKSIZE = 16
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local function get_blockpos(pos)
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return {
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x = math.floor(pos.x/BLOCKSIZE),
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y = math.floor(pos.y/BLOCKSIZE),
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z = math.floor(pos.z/BLOCKSIZE)}
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end
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function core.forceload_block(pos)
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local blockpos = get_blockpos(pos)
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local hash = core.hash_node_position(blockpos)
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if blocks_forceloaded[hash] ~= nil then
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blocks_forceloaded[hash] = blocks_forceloaded[hash] + 1
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return true
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else
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if total_forceloaded >= (tonumber(core.setting_get("max_forceloaded_blocks")) or 16) then
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return false
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end
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total_forceloaded = total_forceloaded+1
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blocks_forceloaded[hash] = 1
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forceload_block(blockpos)
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return true
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end
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end
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function core.forceload_free_block(pos)
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local blockpos = get_blockpos(pos)
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local hash = core.hash_node_position(blockpos)
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if blocks_forceloaded[hash] == nil then return end
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if blocks_forceloaded[hash] > 1 then
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blocks_forceloaded[hash] = blocks_forceloaded[hash] - 1
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else
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total_forceloaded = total_forceloaded-1
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blocks_forceloaded[hash] = nil
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forceload_free_block(blockpos)
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end
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end
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-- Keep the forceloaded areas after restart
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local wpath = core.get_worldpath()
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local function read_file(filename)
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local f = io.open(filename, "r")
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if f==nil then return {} end
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local t = f:read("*all")
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f:close()
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if t=="" or t==nil then return {} end
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return core.deserialize(t)
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end
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local function write_file(filename, table)
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local f = io.open(filename, "w")
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f:write(core.serialize(table))
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f:close()
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end
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blocks_forceloaded = read_file(wpath.."/force_loaded.txt")
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for _, __ in pairs(blocks_forceloaded) do
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total_forceloaded = total_forceloaded + 1
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end
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core.after(5, function()
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for hash, _ in pairs(blocks_forceloaded) do
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local blockpos = core.get_position_from_hash(hash)
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forceload_block(blockpos)
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end
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end)
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core.register_on_shutdown(function()
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write_file(wpath.."/force_loaded.txt", blocks_forceloaded)
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end)
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