Minetest-WorldEditAdditions/worldeditadditions_commands/commands/selectors/sfactor.lua

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local wea = worldeditadditions
worldeditadditions_core.register_command("sfactor", {
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params = "<mode> <factor> [<target=xz>]",
description = "Make the length of one or more target axes of the current selection to be multiple(s) of <factor>.",
privs = { worldedit = true },
require_pos = 2,
parse = function(params_text)
local parts = wea.split(params_text, "%s+", false)
if #parts < 2 then
return false, "Error: Not enough arguments. Expected \"<mode> <factor> [<target>]\"."
end
local mode, fac, targ = unpack(parts)
local modeSet = wea.table.makeset {"grow", "shrink", "avg"}
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-- Mode parsing
if mode == "average" then -- If mode is average set to avg
mode = "avg"
elseif not modeSet[mode] then -- If mode is invalid throw error
return false, "Error: Invalid <mode> \""..mode.."\". Expected \"grow\", \"shrink\", or \"average\"/\"avg\"."
end
-- Factor parsing
local factest = tonumber(fac)
if not factest then
return false, "Error: Invalid <factor> \""..fac.."\". Expected a number."
elseif factest < 2 then
return false, "Error: <factor> is too low. Expected a number equal to or greater than 2."
else
fac = math.floor(factest+0.5)
end
-- Target parsing
if not targ then -- If no target set to default (xz)
targ = "xz"
elseif targ:match("[xyz]+") then -- ensure correct target syntax
targ = table.concat(wea.tochars(targ:match("[xyz]+"),true,true))
else
return false, "Error: Invalid <target> \""..targ.."\". Expected \"x\" and or \"y\" and or \"z\"."
end
return true, mode, fac, targ
end,
func = function(name, mode, fac, targ)
local p1, p2 = vector.new(worldedit.pos1[name]), vector.new(worldedit.pos2[name])
local delta = vector.subtract(p2,p1) -- local delta equation: Vd(a) = V2(a) - V1(a)
local _tl = #targ -- Get targ length as a variable incase mode is "average"/"avg"
local targ = wea.tocharset(targ) -- Break up targ string into set table
local _m = 0 -- _m is the container to hold the average of the axes in targ
-- set _m to the max, min or mean of the target axes depending on mode (_tl is the length of targ) or base if it exists
if mode == "avg" then
for k,v in pairs(targ) do _m = _m + math.abs(delta[k]) end
_m = _m / _tl
end
-- Equasion: round(delta[<axis>] / factor) * factor
local eval = function(int,fac_inner)
local tmp, abs, neg = int / fac_inner, math.abs(int), int < 0
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if mode == "avg" then
if int > _m then int = math.floor(abs / fac_inner) * fac_inner
else int = math.ceil(abs / fac_inner) * fac_inner end
elseif mode == "shrink" then int = math.floor(abs / fac_inner) * fac_inner
else int = math.ceil(abs / fac_inner) * fac_inner end
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if int < fac_inner then int = fac_inner end -- Ensure selection doesn't collapse to 0
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if neg then int = int * -1 end -- Ensure correct facing direction
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return int
end
for k,v in pairs(targ) do delta[k] = eval(delta[k],fac) end
worldedit.pos2[name] = vector.add(p1,delta)
worldedit.mark_pos2(name)
return true, "position 2 set to " .. minetest.pos_to_string(p2)
end
})