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--- Functions for visibly hiding nodes
-- @module worldedit.visualization
minetest.register_node("worldedit:placeholder", {
drawtype = "airlike",
paramtype = "light",
sunlight_propagates = true,
diggable = false,
walkable = false,
groups = {not_in_creative_inventory=1},
})
--- Hides all nodes in a region defined by positions `pos1` and `pos2` by
-- non-destructively replacing them with invisible nodes.
-- @return The number of nodes hidden.
function worldedit.hide(pos1, pos2)
pos1, pos2 = worldedit.sort_pos(pos1, pos2)
worldedit.keep_loaded(pos1, pos2)
local pos = {x=pos1.x, y=0, z=0}
local get_node, get_meta, swap_node = minetest.get_node,
minetest.get_meta, minetest.swap_node
while pos.x <= pos2.x do
pos.y = pos1.y
while pos.y <= pos2.y do
pos.z = pos1.z
while pos.z <= pos2.z do
local node = get_node(pos)
if node.name ~= "air" and node.name ~= "worldedit:placeholder" then
-- Save the node's original name
get_meta(pos):set_string("worldedit_placeholder", node.name)
-- Swap in placeholder node
node.name = "worldedit:placeholder"
swap_node(pos, node)
end
pos.z = pos.z + 1
end
pos.y = pos.y + 1
end
pos.x = pos.x + 1
end
return worldedit.volume(pos1, pos2)
end
--- Suppresses all instances of `node_name` in a region defined by positions
-- `pos1` and `pos2` by non-destructively replacing them with invisible nodes.
-- @return The number of nodes suppressed.
function worldedit.suppress(pos1, pos2, node_name)
-- Ignore placeholder supression
if node_name == "worldedit:placeholder" then
return 0
end
pos1, pos2 = worldedit.sort_pos(pos1, pos2)
worldedit.keep_loaded(pos1, pos2)
local nodes = minetest.find_nodes_in_area(pos1, pos2, node_name)
local get_node, get_meta, swap_node = minetest.get_node,
minetest.get_meta, minetest.swap_node
for _, pos in ipairs(nodes) do
local node = get_node(pos)
-- Save the node's original name
get_meta(pos):set_string("worldedit_placeholder", node.name)
-- Swap in placeholder node
node.name = "worldedit:placeholder"
swap_node(pos, node)
end
return #nodes
end
--- Highlights all instances of `node_name` in a region defined by positions
-- `pos1` and `pos2` by non-destructively hiding all other nodes.
-- @return The number of nodes found.
function worldedit.highlight(pos1, pos2, node_name)
pos1, pos2 = worldedit.sort_pos(pos1, pos2)
worldedit.keep_loaded(pos1, pos2)
local pos = {x=pos1.x, y=0, z=0}
local get_node, get_meta, swap_node = minetest.get_node,
minetest.get_meta, minetest.swap_node
local count = 0
while pos.x <= pos2.x do
pos.y = pos1.y
while pos.y <= pos2.y do
pos.z = pos1.z
while pos.z <= pos2.z do
local node = get_node(pos)
if node.name == node_name then -- Node found
count = count + 1
elseif node.name ~= "worldedit:placeholder" then -- Hide other nodes
-- Save the node's original name
get_meta(pos):set_string("worldedit_placeholder", node.name)
-- Swap in placeholder node
node.name = "worldedit:placeholder"
swap_node(pos, node)
end
pos.z = pos.z + 1
end
pos.y = pos.y + 1
end
pos.x = pos.x + 1
end
return count
end
-- Restores all nodes hidden with WorldEdit functions in a region defined
-- by positions `pos1` and `pos2`.
-- @return The number of nodes restored.
function worldedit.restore(pos1, pos2)
local pos1, pos2 = worldedit.sort_pos(pos1, pos2)
worldedit.keep_loaded(pos1, pos2)
local nodes = minetest.find_nodes_in_area(pos1, pos2, "worldedit:placeholder")
local get_node, get_meta, swap_node = minetest.get_node,
minetest.get_meta, minetest.swap_node
for _, pos in ipairs(nodes) do
local node = get_node(pos)
local meta = get_meta(pos)
local data = meta:to_table()
node.name = data.fields.worldedit_placeholder
data.fields.worldedit_placeholder = nil
meta:from_table(data)
swap_node(pos, node)
end
return #nodes
end
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