diff options
Diffstat (limited to 'builtin')
| -rw-r--r-- | builtin/builtin.lua | 1 | ||||
| -rw-r--r-- | builtin/forceloading.lua | 79 | ||||
| -rw-r--r-- | builtin/misc.lua | 10 |
3 files changed, 90 insertions, 0 deletions
diff --git a/builtin/builtin.lua b/builtin/builtin.lua index 99242f3d2..dc428220a 100644 --- a/builtin/builtin.lua +++ b/builtin/builtin.lua @@ -34,3 +34,4 @@ dofile(modpath.."/falling.lua") dofile(modpath.."/features.lua") dofile(modpath.."/voxelarea.lua") dofile(modpath.."/vector.lua") +dofile(modpath.."/forceloading.lua") diff --git a/builtin/forceloading.lua b/builtin/forceloading.lua new file mode 100644 index 000000000..021de075b --- /dev/null +++ b/builtin/forceloading.lua @@ -0,0 +1,79 @@ +-- Prevent anyone else accessing those functions +local forceload_block = minetest.forceload_block +local forceload_free_block = minetest.forceload_free_block +minetest.forceload_block = nil +minetest.forceload_free_block = nil + +local blocks_forceloaded +local total_forceloaded = 0 + +local BLOCKSIZE = 16 +local function get_blockpos(pos) + return { + x = math.floor(pos.x/BLOCKSIZE), + y = math.floor(pos.y/BLOCKSIZE), + z = math.floor(pos.z/BLOCKSIZE)} +end + +function minetest.forceload_block(pos) + local blockpos = get_blockpos(pos) + local hash = minetest.hash_node_position(blockpos) + if blocks_forceloaded[hash] ~= nil then + blocks_forceloaded[hash] = blocks_forceloaded[hash] + 1 + return true + else + if total_forceloaded >= (minetest.setting_get("max_forceloaded_blocks") or 16) then + return false + end + total_forceloaded = total_forceloaded+1 + blocks_forceloaded[hash] = 1 + forceload_block(blockpos) + return true + end +end + +function minetest.forceload_free_block(pos) + local blockpos = get_blockpos(pos) + local hash = minetest.hash_node_position(blockpos) + if blocks_forceloaded[hash] == nil then return end + if blocks_forceloaded[hash] > 1 then + blocks_forceloaded[hash] = blocks_forceloaded[hash] - 1 + else + total_forceloaded = total_forceloaded-1 + blocks_forceloaded[hash] = nil + forceload_free_block(blockpos) + end +end + +-- Keep the forceloaded areas after restart +local wpath = minetest.get_worldpath() +local function read_file(filename) + local f = io.open(filename, "r") + if f==nil then return {} end + local t = f:read("*all") + f:close() + if t=="" or t==nil then return {} end + return minetest.deserialize(t) +end + +local function write_file(filename, table) + local f = io.open(filename, "w") + f:write(minetest.serialize(table)) + f:close() +end + +blocks_forceloaded = read_file(wpath.."/force_loaded.txt") +for _, __ in pairs(blocks_forceloaded) do + total_forceloaded = total_forceloaded + 1 +end + +minetest.after(5, function() + for hash, _ in pairs(blocks_forceloaded) do + local blockpos = minetest.get_position_from_hash(hash) + forceload_block(blockpos) + end +end) + +minetest.register_on_shutdown(function() + write_file(wpath.."/force_loaded.txt", blocks_forceloaded) +end) diff --git a/builtin/misc.lua b/builtin/misc.lua index fd80aacf6..1d5e146c6 100644 --- a/builtin/misc.lua +++ b/builtin/misc.lua @@ -64,6 +64,16 @@ function minetest.hash_node_position(pos) return (pos.z+32768)*65536*65536 + (pos.y+32768)*65536 + pos.x+32768 end +function minetest.get_position_from_hash(hash) + local pos = {} + pos.x = (hash%65536) - 32768 + hash = math.floor(hash/65536) + pos.y = (hash%65536) - 32768 + hash = math.floor(hash/65536) + pos.z = (hash%65536) - 32768 + return pos +end + function minetest.get_item_group(name, group) if not minetest.registered_items[name] or not minetest.registered_items[name].groups[group] then |