Minetest-WorldEditAdditions/worldeditadditions/lib/dome.lua

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local wea = worldeditadditions
local Vector3 = wea.Vector3
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--- Creates a dome shape with the given node, optionally specifying the
-- direction the point should point.
-- @param pos Vector3 The central point to start drawing the dome from.
-- @param radius number The radius of the dome to create.
-- @param replace_node string The fully qualified name of the node to use to make the dome with.
-- @param pointing_dir Vector3 Optional. The direction the dome should point. Defaults to (0, 1, 0). See also wea.parse.axis_name.
-- @param hollow boolean Whether to make the dome hollow or not. Defaults to false.
function worldeditadditions.dome(pos, radius, replace_node, pointing_dir, hollow)
pos = Vector3.clone(pos)
local pos1 = pos - radius
local pos2 = pos + radius
if not pointing_dir then pointing_dir = Vector3.new(0, 1, 0) end
if hollow == nil then hollow = false end
-- 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()
local node_id_replace = minetest.get_content_id(replace_node)
local radius_sq = radius * radius
local radius_inner_sq = (radius-1) * (radius-1)
local centrepoint = Vector3.mean(pos1, pos2)
local replaced = 0
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 distance_sq = (Vector3.new(x, y, z) - centrepoint):length_squared()
local is_in_range = distance_sq < radius_sq
if hollow and distance_sq < radius_inner_sq then
is_in_range = false
end
if is_in_range then
-- It's inside the radius, but we're still not sure given this is a dome and not a sphere
local should_include = false
if x < centrepoint.x and pointing_dir.x < 0 then
should_include = true
end
if x > centrepoint.x and pointing_dir.x > 0 then
should_include = true
end
if y < centrepoint.y and pointing_dir.y < 0 then
should_include = true
end
if y > centrepoint.y and pointing_dir.y > 0 then
should_include = true
end
if z < centrepoint.z and pointing_dir.z < 0 then
should_include = true
end
if z > centrepoint.z and pointing_dir.z > 0 then
should_include = true
end
if should_include then
data[area:index(x, y, z)] = node_id_replace
replaced = replaced + 1
end
end
end
end
end
-- Save the modified nodes back to disk & return
worldedit.manip_helpers.finish(manip, data)
return true, replaced
end