mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-11-05 06:53:52 +01:00
103 lines
5.0 KiB
Lua
103 lines
5.0 KiB
Lua
-- ███████ ██████ █████ ██ ███████ ██████ ██████ ██ ██ ███ ██
|
|
-- ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ████ ██
|
|
-- ███████ ██ ███████ ██ █████ ██ ██ ██ ██ ██ █ ██ ██ ██ ██
|
|
-- ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ███ ██ ██ ██ ██
|
|
-- ███████ ██████ ██ ██ ███████ ███████ ███████ ██████ ██████ ███ ███ ██ ████
|
|
|
|
--- Scales the defined region down by the given scale factor in the given directions.
|
|
-- @param pos1 Vector Position 1 of the defined region,
|
|
-- @param pos2 Vector Position 2 of the defined region.
|
|
-- @param scale Vector The scale factor - as a vector - by which to scale down.
|
|
-- @param anchor Vector The direction to scale in - as a vector. e.g. { x = -1, y = 1, z = -1 } would mean scale in the negative x, positive y, and nevative z directions.
|
|
-- @return boolean, string|table Whether the operation was successful or not. If not, then an error messagea as a string is also passed. If it was, then a statistics object is returned instead.
|
|
function worldeditadditions.scale_down(pos1, pos2, scale, anchor)
|
|
pos1, pos2 = worldedit.sort_pos(pos1, pos2)
|
|
if scale.x > 1 or scale.y > 1 or scale.z > 1 or scale.x < -1 or scale.y < -1 or scale.z < -1 then
|
|
return false, "Error: Scale factor vectors may not mix values -1 < factor < 1 and (1 < factor or factor < -1) - in other words, you can't scale both up and down at the same time (try worldeditadditions.scale, which automatically applies such scale factor vectors as 2 successive operations)"
|
|
end
|
|
if anchor.x == 0 or anchor.y == 0 or anchor.z == 0 then
|
|
return false, "Error: One of the components of the anchor vector was 0 (anchor components should either be greater than or less than 0 to indicate the anchor to scale in.)"
|
|
end
|
|
|
|
local scale_down = {
|
|
x = math.floor(1 / scale.x),
|
|
y = math.floor(1 / scale.y),
|
|
z = math.floor(1 / scale.z)
|
|
}
|
|
local size = vector.subtract(pos2, pos1)
|
|
|
|
if size.x < scale_down.x or size.y < scale_down.y or size.z < scale.z then
|
|
return false, "Error: Area isn't big enough to apply scale down by "..worldeditadditions.vector.tostring(scale).."."
|
|
end
|
|
|
|
local size_small = {
|
|
x = math.floor(size.x / scale_down.x),
|
|
y = math.floor(size.y / scale_down.y),
|
|
z = math.floor(size.z / scale_down.z)
|
|
}
|
|
|
|
local manip, area = worldedit.manip_helpers.init(pos1, pos2)
|
|
local data = manip:get_data()
|
|
local data_copy = worldeditadditions.table.shallowcopy(data)
|
|
|
|
local node_id_air = minetest.get_content_id("air")
|
|
|
|
local pos1_small = vector.new(pos1)
|
|
local pos2_small = vector.new(pos2)
|
|
|
|
if anchor.x < 1 then pos1_small.x = pos2_small.x - size_small.x
|
|
else pos2_small.x = pos1_small.x + size_small.x end
|
|
if anchor.y < 1 then pos1_small.y = pos2_small.y - size_small.y
|
|
else pos2_small.y = pos1_small.y + size_small.y end
|
|
if anchor.z < 1 then pos1_small.z = pos2_small.z - size_small.z
|
|
else pos2_small.z = pos1_small.z + size_small.z end
|
|
|
|
|
|
local stats = { updated = 0, scale = scale_down, pos1 = pos1_small, pos2 = pos2_small }
|
|
-- Zero out the area we're scaling down into
|
|
for i in area:iterp(pos1, pos2) do
|
|
data_copy[i] = node_id_air
|
|
-- We update the entire area, even though we're scaling down
|
|
-- ....because we fill in the area we left behind with air
|
|
stats.updated = stats.updated + 1
|
|
end
|
|
|
|
for z = pos2.z, pos1.z, -1 do
|
|
for y = pos2.y, pos1.y, -1 do
|
|
for x = pos2.x, pos1.x, -1 do
|
|
local posi_rel = vector.subtract({ x = x, y = y, z = z }, pos1)
|
|
|
|
-- local posi_copy = worldeditadditions.table.shallowcopy(posi_rel)
|
|
-- posi_copy = vector.floor(vector.divide(posi_rel/*, scale_down*/))
|
|
|
|
local posi_copy = {
|
|
x = math.floor(posi_rel.x / scale_down.x),
|
|
y = math.floor(posi_rel.y / scale_down.y),
|
|
z = math.floor(posi_rel.z / scale_down.z)
|
|
}
|
|
|
|
if anchor.x < 0 then posi_copy.x = size.x - posi_copy.x end
|
|
if anchor.y < 0 then posi_copy.y = size.y - posi_copy.y end
|
|
if anchor.z < 0 then posi_copy.z = size.z - posi_copy.z end
|
|
|
|
posi_copy = vector.add(pos1, posi_copy)
|
|
|
|
local i_source = area:index(x, y, z)
|
|
local i_target = area:index(posi_copy.x, posi_copy.y, posi_copy.z)
|
|
|
|
-- Technically we could save some operations here by not setting
|
|
-- the target multiple times per copy, but the calculations
|
|
-- above are probably a lot more taxing
|
|
-- TODO Be more intelligent about deciding what node to replace with here
|
|
data_copy[i_target] = data[i_source]
|
|
end
|
|
end
|
|
end
|
|
|
|
|
|
-- Save the modified nodes back to disk & return
|
|
worldedit.manip_helpers.finish(manip, data_copy)
|
|
|
|
return true, stats
|
|
end
|