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map.lua
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map.lua
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--[========[Map module]========]
print("Loading map module...")
if wesnoth.kernel_type() == "Game Lua Kernel" then
function wesnoth.map.split_terrain_code(code)
return table.unpack(code:split('^', {remove_empty = false}))
end
-- possible terrain string inputs:
-- A A^ A^B ^ ^B
-- implied mode:
-- both base both overlay overlay
function wesnoth.map.replace_base(code)
local base, overlay = wesnoth.map.split_terrain_code(code)
if base == nil then -- ^ or ^B
-- There's no base to replace with, so do nothing
return ''
else
-- Use the specified base but ignore the overlay
return base .. '^'
end
end
function wesnoth.map.replace_overlay(code)
local base, overlay = wesnoth.map.split_terrain_code(code)
if overlay == nil or overlay == '' then -- A or A^
-- No overlay was specified, so we want to clear the overlay without touching the base
return '^'
else
-- An overlay was specified, so use that and ignore the base
return '^' .. overlay
end
end
function wesnoth.map.replace_both(code)
local base, overlay = wesnoth.map.split_terrain_code(code)
if base == '' then -- ^ or ^B
-- There's no way to find a base to replace with in this case.
-- Could use the existing base, but that's not really replacing both, is it?
error('replace_both: no base terrain specified')
elseif overlay == '' then -- A^
-- This would normally mean replace base while preserving overlay,
-- but we actually want to replace base and clear overlay.
return base
else
-- It's already going to replace both, so return unchanged
return code
end
end
end