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Forceloading: Transient forceloads
Adds a flag to forceload_block which lets you turn off persistence for that forceload.
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@ -5,6 +5,7 @@ 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 blocks_temploaded = {}
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local total_forceloaded = 0
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local BLOCKSIZE = core.MAP_BLOCKSIZE
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@ -15,32 +16,52 @@ local function get_blockpos(pos)
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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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-- When we create/free a forceload, it's either transient or persistent. We want
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-- to add to/remove from the table that corresponds to the type of forceload, but
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-- we also need the other table because whether we forceload a block depends on
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-- both tables.
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-- This function returns the "primary" table we are adding to/removing from, and
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-- the other table.
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local function get_relevant_tables(transient)
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if transient then
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return blocks_temploaded, blocks_forceloaded
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else
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return blocks_forceloaded, blocks_temploaded
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end
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end
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function core.forceload_block(pos, transient)
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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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local relevant_table, other_table = get_relevant_tables(transient)
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if relevant_table[hash] ~= nil then
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relevant_table[hash] = relevant_table[hash] + 1
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return true
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elseif other_table[hash] ~= nil then
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relevant_table[hash] = 1
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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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relevant_table[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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function core.forceload_free_block(pos, transient)
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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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local relevant_table, other_table = get_relevant_tables(transient)
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if relevant_table[hash] == nil then return end
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if relevant_table[hash] > 1 then
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relevant_table[hash] = relevant_table[hash] - 1
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elseif other_table[hash] ~= nil then
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relevant_table[hash] = nil
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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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relevant_table[hash] = nil
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forceload_free_block(blockpos)
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end
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end
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@ -2622,13 +2622,17 @@ These functions return the leftover itemstack.
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the creative mode setting, and checks for "sneak" to set the `invert_wall`
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parameter.
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* `minetest.forceload_block(pos)`
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* `minetest.forceload_block(pos[, transient])`
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* forceloads the position `pos`.
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* returns `true` if area could be forceloaded
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* Please note that forceloaded areas are saved when the server restarts.
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* If `transient` is `false` or absent, the forceload will be persistent
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(saved between server runs). If `true`, the forceload will be transient
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(not saved between server runs).
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* `minetest.forceload_free_block(pos)`
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* `minetest.forceload_free_block(pos[, transient])`
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* stops forceloading the position `pos`
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* If `transient` is `false` or absent, frees a persistent forceload.
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If `true`, frees a transient forceload.
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* `minetest.request_insecure_environment()`: returns an environment containing
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insecure functions if the calling mod has been listed as trusted in the
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