Minetest-WorldEditAdditions/worldeditadditions/utils/parse/axes.lua
Starbeamrainbowlabs 653864be99
Start working on //copy, but it's not finished yet.
We need to merge @VorTechnix's branch in first to gain access to 
advanced axis parsing functions before we can complete it.

For this reason, the command registration for //copy is currently 
commented out.
2021-10-11 02:41:45 +01:00

56 lines
1.8 KiB
Lua

local wea = worldeditadditions
local Vector3 = dofile(wea.modpath.."/utils/vector3.lua")
-- BUG: This does not exist yet - need to merge @VorTechnix's branch first to get it
-- TODO: Uncomment then once it's implemented
-- local parse_axis = dofile(wea.modpath.."/utils/axis.lua")
--- Parses a token list of axes and counts into a Vector3.
-- For example, "x 4" would become { x = 4, y = 0, z = 0 }, and "? 4 -z 10"
-- might become { x = 4, y = 0, z = -10 }.
-- Note that the input here needs to be *pre split*. wea.split_shell is
-- recommended for this purpose.
-- Uses wea.parse.axis for parsing axis names.
-- @param token_list string[] A list of tokens to parse
-- @returns Vector3 A Vector3 generated from parsing out the input token list.
local function parse_axes(token_list)
local vector_result = wea.Vector3.new()
if #token_list < 2 then
return false, "Error: Not enough arguments (at least 2 are required)"
end
local state = "AXIS"
local current_axis = nil
local success
for i,token in ipairs(token_list) do
if state == "AXIS" then
success, current_axis = parse_axis(token)
if not success then return success, current_axis end
state = "VALUE"
elseif state == "VALUE" then
local offset_this = tonumber(token)
if not offset_this then
return false, "Error: Invalid count value for axis '"..current_axis.."'. Values may only be positive or negative integers."
end
-- Handle negative axes
if current_axis:sub(1, 1) == "-" then
offset_this = -offset_this
current_axis = current_axis:sub(2, 2)
end
vector_result[current_axis] = vector_result[current_axis] + offset_this
state = "AXIS"
else
return false, "Error: Failed to parse input due to unknown state '"..tostring(state).."' (this is probably a bug - please report it!)"
end
end
return vector_result
end
return parse_axes