mtcontrib/Minetest-WorldEdit
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This commit is contained in:
sfan5 2019-09-09 15:42:22 +02:00
parent eb1627ca99
commit fa546c6c0e
1 changed files with 40 additions and 19 deletions
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59
worldedit/serialization.lua
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@ -79,7 +79,35 @@ function worldedit.serialize(pos1, pos2)
end
local other1, other2 = worldedit.get_axis_others(axis)
-- Helper functions
-- Helper functions (1)
local MATCH_DIST = 8
local function match_init(array, first_value)
array[1] = first_value
return {first_value}
end
local function match_try(cache, value)
local i = #cache
while i >= 1 do
if cache[i] == value then
return -(#cache - i + 1)
end
i = i - 1
end
return nil
end
local function match_push(array, cache, match, value)
if match ~= nil then -- don't advance cache
array[#array + 1] = match
return
end
local idx = #cache + 1
cache[idx] = value
if idx > MATCH_DIST then
table.remove(cache, 1)
end
array[#array + 1] = value
end
-- Helper functions (2)
local function cur_new(pos, pos1)
return {
a = axis,
@ -90,18 +118,6 @@ function worldedit.serialize(pos1, pos2)
param2 = {},
}
end
local function try_match(array, value)
local match_dist = 8
local first = math.max(1, #array - match_dist + 1)
local i = #array
while i >= first do
if array[i] == value then
return -(#array - i + 1)
end
i = i - 1
end
return value
end
local function cur_finish(result, cur)
if #cur.param1 == 1 and cur.param1[1] == 0 then
cur.param1 = nil
@ -111,12 +127,14 @@ function worldedit.serialize(pos1, pos2)
end
result[#result + 1] = cur
end
--magic number: 24
-- Serialize stuff
local pos = {}
local count = 0
local result = {}
local cur
local cache_data, cache_param1, cache_param2
pos[other1] = pos1[other1]
while pos[other1] <= pos2[other1] do
pos[other2] = pos1[other2]
@ -128,15 +146,18 @@ function worldedit.serialize(pos1, pos2)
if node.name ~= "air" and node.name ~= "ignore" then
if cur == nil then -- Start a new row
cur = cur_new(pos, pos1, axis, other1, other2)
cur.data[1] = node.name
cur.param1[1] = node.param1
cur.param2[1] = node.param2
cache_data = match_init(cur.data, node.name)
cache_param1 = match_init(cur.param1, node.param1)
cache_param2 = match_init(cur.param2, node.param2)
else -- Push to existing row
local next_c = cur.c + 1
cur.c = next_c
cur.data[next_c] = try_match(cur.data, node.name)
cur.param1[next_c] = try_match(cur.param1, node.param1)
cur.param2[next_c] = try_match(cur.param2, node.param2)
local v = node.name
match_push(cur.data, cache_data, match_try(cache_data, v), v)
v = node.param1
match_push(cur.param1, cache_param1, match_try(cache_param1, v), v)
v = node.param2
match_push(cur.param2, cache_param2, match_try(cache_param2, v), v)
end
count = count + 1
else