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--- Common functions [INTERNAL]. All of these functions are internal!
-- @module worldedit.common
--- Copies and modifies positions `pos1` and `pos2` so that each component of
-- `pos1` is less than or equal to the corresponding component of `pos2`.
-- Returns the new positions.
function worldedit.sort_pos(pos1, pos2)
pos1 = {x=pos1.x, y=pos1.y, z=pos1.z}
pos2 = {x=pos2.x, y=pos2.y, z=pos2.z}
if pos1.x > pos2.x then
pos2.x, pos1.x = pos1.x, pos2.x
end
if pos1.y > pos2.y then
pos2.y, pos1.y = pos1.y, pos2.y
end
if pos1.z > pos2.z then
pos2.z, pos1.z = pos1.z, pos2.z
end
return pos1, pos2
end
--- Determines the volume of the region defined by positions `pos1` and `pos2`.
-- @return The volume.
function worldedit.volume(pos1, pos2)
local pos1, pos2 = worldedit.sort_pos(pos1, pos2)
return (pos2.x - pos1.x + 1) *
(pos2.y - pos1.y + 1) *
(pos2.z - pos1.z + 1)
end
--- Gets other axes given an axis.
-- @raise Axis must be x, y, or z!
function worldedit.get_axis_others(axis)
if axis == "x" then
return "y", "z"
elseif axis == "y" then
return "x", "z"
elseif axis == "z" then
return "x", "y"
else
error("Axis must be x, y, or z!")
end
end
function worldedit.keep_loaded(pos1, pos2)
local manip = minetest.get_voxel_manip()
manip:read_from_map(pos1, pos2)
end
local mh = {}
worldedit.manip_helpers = mh
--- Generates an empty VoxelManip data table for an area.
-- @return The empty data table.
function mh.get_empty_data(area)
-- Fill emerged area with ignore so that blocks in the area that are
-- only partially modified aren't overwriten.
local data = {}
local c_ignore = minetest.get_content_id("ignore")
for i = 1, worldedit.volume(area.MinEdge, area.MaxEdge) do
data[i] = c_ignore
end
return data
end
function mh.init(pos1, pos2)
local manip = minetest.get_voxel_manip()
local emerged_pos1, emerged_pos2 = manip:read_from_map(pos1, pos2)
local area = VoxelArea:new({MinEdge=emerged_pos1, MaxEdge=emerged_pos2})
return manip, area
end
function mh.init_radius(pos, radius)
local pos1 = vector.subtract(pos, radius)
local pos2 = vector.add(pos, radius)
return mh.init(pos1, pos2)
end
function mh.init_axis_radius(base_pos, axis, radius)
return mh.init_axis_radius_length(base_pos, axis, radius, radius)
end
function mh.init_axis_radius_length(base_pos, axis, radius, length)
local other1, other2 = worldedit.get_axis_others(axis)
local pos1 = {
[axis] = base_pos[axis],
[other1] = base_pos[other1] - radius,
[other2] = base_pos[other2] - radius
}
local pos2 = {
[axis] = base_pos[axis] + length,
[other1] = base_pos[other1] + radius,
[other2] = base_pos[other2] + radius
}
return mh.init(pos1, pos2)
end
function mh.finish(manip, data)
-- Update map
manip:set_data(data)
manip:write_to_map()
manip:update_map()
end
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