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[mapgen] Add safe chunk calculation

This commit is contained in:
kay27 2021-05-02 02:26:41 +04:00
parent b12367b500
commit f38c8daab7
1 changed files with 57 additions and 24 deletions

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@ -1,13 +1,17 @@
mcl_mapgen = {}
local minetest_log, math_floor = minetest.log, math.floor
local minetest_get_node, minetest_get_voxel_manip = minetest.get_node, minetest.get_voxel_manip
local math_floor = math.floor
local math_max = math.max
local minetest_get_node = minetest.get_node
local minetest_get_voxel_manip = minetest.get_voxel_manip
local minetest_log = minetest.log
local minetest_pos_to_string = minetest.pos_to_string
-- Calculate mapgen_edge_min/mapgen_edge_max
mcl_mapgen.CS = math.max(1, tonumber(minetest.get_mapgen_setting("chunksize")) or 5)
mcl_mapgen.BS = math.max(1, core.MAP_BLOCKSIZE or 16)
mcl_mapgen.LIMIT = math.max(1, tonumber(minetest.get_mapgen_setting("mapgen_limit")) or 31000)
mcl_mapgen.MAX_LIMIT = math.max(1, core.MAX_MAP_GENERATION_LIMIT or 31000)
mcl_mapgen.CS = math_max(1, tonumber(minetest.get_mapgen_setting("chunksize")) or 5)
mcl_mapgen.BS = math_max(1, core.MAP_BLOCKSIZE or 16)
mcl_mapgen.LIMIT = math_max(1, tonumber(minetest.get_mapgen_setting("mapgen_limit")) or 31000)
mcl_mapgen.MAX_LIMIT = math_max(1, core.MAX_MAP_GENERATION_LIMIT or 31000) -- might be set to 31000 or removed, see https://github.com/minetest/minetest/issues/10428
mcl_mapgen.OFFSET = - math_floor(mcl_mapgen.CS / 2)
mcl_mapgen.OFFSET_NODES = mcl_mapgen.OFFSET * mcl_mapgen.BS
mcl_mapgen.CS_NODES = mcl_mapgen.CS * mcl_mapgen.BS
@ -22,8 +26,8 @@ local mapgen_limit_b = math_floor(math.min(mcl_mapgen.LIMIT, mcl_mapgen.MAX_LIMI
local mapgen_limit_min = - mapgen_limit_b * mcl_mapgen.BS
local mapgen_limit_max = (mapgen_limit_b + 1) * mcl_mapgen.BS - 1
local numcmin = math.max(math_floor((ccfmin - mapgen_limit_min) / mcl_mapgen.CS_NODES), 0) -- Number of complete chunks from central chunk
local numcmax = math.max(math_floor((mapgen_limit_max - ccfmax) / mcl_mapgen.CS_NODES), 0) -- fullminp/fullmaxp to effective mapgen limits.
local numcmin = math_max(math_floor((ccfmin - mapgen_limit_min) / mcl_mapgen.CS_NODES), 0) -- Number of complete chunks from central chunk
local numcmax = math_max(math_floor((mapgen_limit_max - ccfmax) / mcl_mapgen.CS_NODES), 0) -- fullminp/fullmaxp to effective mapgen limits.
mcl_mapgen.EDGE_MIN = central_chunk_min_pos - numcmin * mcl_mapgen.CS_NODES
mcl_mapgen.EDGE_MAX = central_chunk_max_pos + numcmax * mcl_mapgen.CS_NODES
@ -39,6 +43,8 @@ local BS, CS = mcl_mapgen.BS, mcl_mapgen.CS -- Mapblock size (in nodes), Mapchun
local LAST_BLOCK, LAST_NODE = CS - 1, BS - 1 -- First mapblock in chunk (node in mapblock) has number 0, last has THIS number. It's for runtime optimization
local offset = mcl_mapgen.OFFSET -- Central mapchunk offset (in blocks)
local CS_3D = CS * CS * CS
local DEFAULT_PRIORITY = 5000
function mcl_mapgen.register_chunk_generator(callback_function, priority)
@ -66,18 +72,22 @@ function mcl_mapgen.register_block_generator_lvm(callback_function, priority)
end
local storage = minetest.get_mod_storage()
local blocks = minetest.deserialize( storage:get_string("mapgen_blocks") or "return {}") or {}
minetest.register_on_shutdown(function() storage:set_string("mapgen_blocks", minetest.serialize(blocks)) end)
local blocks = minetest.deserialize(storage:get_string("mapgen_blocks") or "return {}") or {}
local chunks = minetest.deserialize(storage:get_string("mapgen_chunks") or "return {}") or {}
minetest.register_on_shutdown(function()
storage:set_string("mapgen_chunks", minetest.serialize(chunks))
storage:set_string("mapgen_blocks", minetest.serialize(blocks))
end)
local vm_context-- here will be many references and flags, like: param2, light_data, heightmap, biomemap, heatmap, humiditymap, gennotify, write_lvm, write_param2, shadow
local data, data2, area
local current_blocks = {}
local current_chunks = {}
minetest.register_on_generated(function(minp, maxp, blockseed)
local minp, maxp, blockseed = minp, maxp, blockseed
minetest_log("verbose", "[mcl_mapgen] New chunk: minp=" .. minetest.pos_to_string(minp) .. ", maxp=" .. minetest.pos_to_string(maxp) .. ", blockseed=" .. blockseed)
local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
minetest_log("warning", "[mcl_mapgen] New_chunk=" .. minetest_pos_to_string(minp) .. "..." .. minetest_pos_to_string(maxp) .. ", shall=" .. minetest_pos_to_string(emin) .. "..." .. minetest_pos_to_string(emax) .. ", blockseed=" .. tostring(blockseed))
if lvm > 0 then
vm_context = {lvm_param2_buffer = lvm_param2_buffer, vm = vm, emin = emin, emax = emax, minp = minp, maxp = maxp, blockseed = blockseed}
@ -87,12 +97,21 @@ minetest.register_on_generated(function(minp, maxp, blockseed)
vm_context.area = area
end
local chunk_is_ready = true
if block > 0 then
if safe_functions > 0 then
local x0, y0, z0 = minp.x, minp.y, minp.z
local bx0, by0, bz0 = math_floor(x0/BS), math_floor(y0/BS), math_floor(z0/BS)
local bx1, by1, bz1 = bx0 + LAST_BLOCK, by0 + LAST_BLOCK, bz0 + LAST_BLOCK -- only for entire chunk check
-- Keep `blockseed` in `chunks[cx][cy][cz].seed` for further safe usage:
local cx0, cy0, cz0 = math_floor((bx0-offset)/CS), math_floor((by0-offset)/CS), math_floor((bz0-offset)/CS)
if not chunks[cx0] then chunks[cx0] = {} end
if not chunks[cx0][cy0] then chunks[cx0][cy0] = {} end
if not chunks[cx0][cy0][cz0] then
chunks[cx0][cy0][cz0] = {seed = blockseed, counter = 0}
else
chunks[cx0][cy0][cz0].seed = blockseed
end
local x1, y1, z1, x2, y2, z2 = emin.x, emin.y, emin.z, emax.x, emax.y, emax.z
local x, y, z = x1, y1, z1 -- iterate 7x7x7 mapchunk, {x,y,z} - first node pos. of mapblock
local bx, by, bz -- block coords (in blocs)
@ -100,24 +119,43 @@ minetest.register_on_generated(function(minp, maxp, blockseed)
while x < x2 do
bx = math_floor(x/BS)
local block_pos_offset_removed = bx - offset
local cx = math_floor(block_pos_offset_removed / CS)
box = block_pos_offset_removed % CS
if not blocks[bx] then blocks[bx]={} end
local total_mapgen_block_writes_through_x = (box > 0 and box < LAST_BLOCK) and 4 or 8
while y < y2 do
by = math_floor(y/BS)
block_pos_offset_removed = by - offset
local cy = math_floor(block_pos_offset_removed / CS)
boy = block_pos_offset_removed % CS
if not blocks[bx][by] then blocks[bx][by]={} end
local total_mapgen_block_writes_through_y = (boy > 0 and boy < LAST_BLOCK) and math_floor(total_mapgen_block_writes_through_x / 2) or total_mapgen_block_writes_through_x
while z < z2 do
bz = math_floor(z/BS)
block_pos_offset_removed = bz - offset
local cz = math_floor(block_pos_offset_removed / CS)
boz = block_pos_offset_removed % CS
local total_mapgen_block_writes = (boz > 0 and boz < LAST_BLOCK) and math_floor(total_mapgen_block_writes_through_y / 2) or total_mapgen_block_writes_through_y
local current_mapgen_block_writes = blocks[bx][by][bz] and (blocks[bx][by][bz] + 1) or 1
if current_mapgen_block_writes == total_mapgen_block_writes then
-- this block shouldn't be overwritten anymore, no need to keep it in memory
blocks[bx][by][bz] = nil
if not chunks[cx][cy][cz] then
if not chunks[cx] then chunks[cx] = {} end
if not chunks[cx][cy] then chunks[cx][cy] = {} end
if not chunks[cx][cy][cz] then chunks[cx][cy][cz] = {counter = 1} end
else
chunks[cx][cy][cz].counter = chunks[cx][cy][cz].counter + 1
if chunks[cx][cy][cz].counter >= CS_3D then
-- this chunk shouldn't be overwritten anymore, no need to keep it in memory
local chunkseed = chunks[cx][cy][cz].seed
process_generated_chunk(cx, cy, cz, chunkseed)
chunks[cx][cy][cz] = nil
if next(chunks[cx][cy]) == nil then chunks[cx][cy] = nil end
if next(chunks[cx]) == nil then chunks[cx] = nil end
end
end
vm_context.seed = blockseed + box * 7 + boy * 243 + boz * 11931
if lvm_block > 0 then
vm_context.minp, vm_content.maxp = {x=x, y=y, z=z}, {x=x+LAST_NODE, y=y+LAST_NODE, z=z+LAST_NODE}
@ -130,7 +168,6 @@ minetest.register_on_generated(function(minp, maxp, blockseed)
end
else
blocks[bx][by][bz] = current_mapgen_block_writes
chunk_is_ready = chunk_is_ready and (bx < bx0 or bx > bx1 or by < by0 or by > by1 or bz < bz0 or bz > bz1)
end
z = z + BS
end
@ -145,10 +182,8 @@ minetest.register_on_generated(function(minp, maxp, blockseed)
end
if lvm > 0 then
if chunk_is_ready then
for _, v in pairs(lvm_chunk_queue) do
vm_context = v.f(vm_context)
end
for _, v in pairs(lvm_chunk_queue) do
vm_context = v.f(vm_context)
end
if vm_context.write then
vm:set_data(data)
@ -161,10 +196,8 @@ minetest.register_on_generated(function(minp, maxp, blockseed)
vm:update_liquids()
end
if chunk_is_ready then
for _, v in pairs(node_chunk_queue) do
v.f(minp, maxp, blockseed)
end
for _, v in pairs(node_chunk_queue) do
v.f(minp, maxp, blockseed)
end
for i, b in pairs(current_blocks) do