92 lines
3.6 KiB
Lua
92 lines
3.6 KiB
Lua
local wea_c = worldeditadditions_core
|
|
local Vector3 = wea_c.Vector3
|
|
|
|
|
|
--- Flood-fill command for complex lakes etc.
|
|
-- @param start_pos Vector3 The position to start floodfilling from.
|
|
-- @param radius number The maximum radius to limit the floodfill operation too.
|
|
-- @param replace_node string The (normalised) name of the node to replace with when floodfilling.
|
|
-- @returns number The number of nodes replaced.
|
|
function worldeditadditions.floodfill(start_pos, radius, replace_node)
|
|
start_pos = Vector3.clone(start_pos)
|
|
|
|
-- Calculate the area we want to modify
|
|
local pos1 = start_pos + Vector3.new(radius, 0, radius)
|
|
local pos2 = start_pos - Vector3.new(radius, radius, radius)
|
|
pos1, pos2 = Vector3.sort(pos1, pos2)
|
|
-- pos2 will always have the highest co-ordinates now
|
|
|
|
|
|
-- Fetch the nodes in the specified area
|
|
local manip, area = worldedit.manip_helpers.init(pos1, pos2)
|
|
local data = manip:get_data()
|
|
|
|
-- Setup for the floodfill operation itself
|
|
local start_pos_index = area:index(start_pos.x, start_pos.y, start_pos.z)
|
|
|
|
local search_id = data[start_pos_index]
|
|
local replace_id = minetest.get_content_id(replace_node)
|
|
local radius_sq = radius*radius
|
|
|
|
if search_id == replace_id then
|
|
return false
|
|
end
|
|
|
|
local count = 0
|
|
local remaining_nodes = wea_c.Queue.new() remaining_nodes:enqueue(start_pos_index)
|
|
|
|
-- Do the floodfill
|
|
while remaining_nodes:is_empty() == false do
|
|
local cur = remaining_nodes:dequeue()
|
|
|
|
-- Replace this node
|
|
data[cur] = replace_id
|
|
count = count + 1
|
|
|
|
-- Check all the nearby nodes
|
|
-- We don't need to go upwards here, since we're filling in lake-style
|
|
local xplus = cur + 1 -- +X
|
|
if data[xplus] == search_id and
|
|
(Vector3.clone(area:position(xplus)) - start_pos):length_squared() < radius_sq and
|
|
not remaining_nodes:contains(xplus) then
|
|
-- minetest.log("action", "[floodfill] [+X] index " .. xplus .. " is a " .. data[xplus] .. ", searching for a " .. search_id)
|
|
remaining_nodes:enqueue(xplus)
|
|
end
|
|
local xminus = cur - 1 -- -X
|
|
if data[xminus] == search_id and
|
|
(Vector3.clone(area:position(xminus)) - start_pos):length_squared() < radius_sq and
|
|
not remaining_nodes:contains(xminus) then
|
|
-- minetest.log("action", "[floodfill] [-X] index " .. xminus .. " is a " .. data[xminus] .. ", searching for a " .. search_id)
|
|
remaining_nodes:enqueue(xminus)
|
|
end
|
|
local zplus = cur + area.zstride -- +Z
|
|
if data[zplus] == search_id and
|
|
(Vector3.clone(area:position(zplus)) - start_pos):length_squared() < radius_sq and
|
|
not remaining_nodes:contains(zplus) then
|
|
-- minetest.log("action", "[floodfill] [+Z] index " .. zplus .. " is a " .. data[zplus] .. ", searching for a " .. search_id)
|
|
remaining_nodes:enqueue(zplus)
|
|
end
|
|
local zminus = cur - area.zstride -- -Z
|
|
if data[zminus] == search_id and
|
|
(Vector3.clone(area:position(zminus)) - start_pos):length_squared() < radius_sq and
|
|
not remaining_nodes:contains(zminus) then
|
|
-- minetest.log("action", "[floodfill] [-Z] index " .. zminus .. " is a " .. data[zminus] .. ", searching for a " .. search_id)
|
|
remaining_nodes:enqueue(zminus)
|
|
end
|
|
local yminus = cur - area.ystride -- -Y
|
|
if data[yminus] == search_id and
|
|
(Vector3.clone(area:position(yminus)) - start_pos):length_squared() < radius_sq and
|
|
not remaining_nodes:contains(yminus) then
|
|
-- minetest.log("action", "[floodfill] [-Y] index " .. yminus .. " is a " .. data[yminus] .. ", searching for a " .. search_id)
|
|
remaining_nodes:enqueue(yminus)
|
|
end
|
|
|
|
count = count + 1
|
|
end
|
|
|
|
-- Save the modified nodes back to disk & return
|
|
worldedit.manip_helpers.finish(manip, data)
|
|
|
|
return count
|
|
end
|