forked from VoxeLibre/VoxeLibre
71 lines
1.9 KiB
Lua
71 lines
1.9 KiB
Lua
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worldedit = worldedit or {}
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local minetest = minetest -- local copy of global
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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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worldedit.sort_pos = function(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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-- Executes `code` as a Lua chunk in the global namespace,
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-- returning an error if the code fails, or nil otherwise.
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worldedit.lua = function(code)
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local func, err = loadstring(code)
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if not func then -- Syntax error
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return err
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end
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local good, err = pcall(operation)
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if not good then -- Runtime error
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return err
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end
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return nil
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end
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-- Executes `code` as a Lua chunk in the global namespace with the variable
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-- pos available, for each node in a region defined by positions `pos1` and
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-- `pos2`, returning an error if the code fails, or nil otherwise
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worldedit.luatransform = function(pos1, pos2, code)
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pos1, pos2 = worldedit.sort_pos(pos1, pos2)
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local factory, err = loadstring("return function(pos) " .. code .. " end")
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if not factory then -- Syntax error
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return err
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end
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local func = factory()
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-- Keep area loaded
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local manip = minetest.get_voxel_manip()
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manip:read_from_map(pos1, pos2)
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local pos = {x=pos1.x, y=0, z=0}
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while pos.x <= pos2.x do
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pos.y = pos1.y
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while pos.y <= pos2.y do
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pos.z = pos1.z
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while pos.z <= pos2.z do
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local good, err = pcall(func, pos)
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if not good then -- Runtime error
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return err
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end
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pos.z = pos.z + 1
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end
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pos.y = pos.y + 1
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end
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pos.x = pos.x + 1
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end
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return nil
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end
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