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