Converting LUA table to WML array[solved]

[Inkerrio]

Apparently, you do this through wml.array_access.set, but it doesn't work, not creating new WML variables and not modifying exiting. What am I missing?

Code: Select all

    wesnoth.game_events.on_mouse_move = function(x, y)
	local u = wesnoth.units.get(17, 3)
	local path, cost = wesnoth.paths.find_path(u, {3,20}, { ignore_units = true, viewing_side = 0 })
	for i, loc in ipairs(path) do
    wml.array_access.set("coordinate_list", {x = loc[1], y = loc[2]})
    end
end

[white_haired_uncle]

Looks like you're creating the same array over and over. I'm guessing you're trying to repeatedly append to coordinate_list, but you're just overwriting it.

Perhaps you could tell us what you're trying to accomplish?

Try this

Code: Select all

wesnoth.game_events.on_mouse_move = function(x, y)
	local u = wesnoth.units.get(17, 3)
	local path, cost = wesnoth.paths.find_path(u, {3,20}, { ignore_units = true, viewing_side = 0 })
        local foo = {}
	for _, loc in pairs(path) do
            table.insert(foo, {x = loc[1], y = loc[2]})
        end 
        wml.array_access.set("coordinate_list", foo)
end

[Inkerrio]

I'm trying to turn LUA table with x y coordinates from wesnoth.paths.find_path into a set of WML arrays. The iteration seems to be working correctly, as I can print these coordinates to console, but I'm definitely missing something when it comes to converting them to WML, as this step isn't described well anywhere

[white_haired_uncle]

You want a set of arrays? Seems odd, but okay. You can't call them all coordinate_list though.

I fixed the example above. It doesn't do exactly what you ask, but I bet if you try it you just might like it.

https://wiki.wesnoth.org/LuaAPI/wml#wml ... access.set

[Celtic_Minstrel]

Apparently, you do this through wml.array_access.set, but it doesn't work, not creating new WML variables and not modifying exiting. What am I missing?

Code: Select all

    wesnoth.game_events.on_mouse_move = function(x, y)
	local u = wesnoth.units.get(17, 3)
	local path, cost = wesnoth.paths.find_path(u, {3,20}, { ignore_units = true, viewing_side = 0 })
	for i, loc in ipairs(path) do
    wml.array_access.set("coordinate_list", {x = loc[1], y = loc[2]})
    end
end

That's not wml.array_access.set is for. If you're using a loop like that, you can just write wml.variables['coordinate_list[' .. i .. ']'] = {x = loc[1], y = loc[2]}. What wml.array_access.set does is basically handle that loop for you, so you could probably also write wml.array_access.set("coordinate_list", path) instead of the loop.

Another way to say it is that you only need to use array_access if you have an array in Lua and want to transfer it directly into WML. You don't use it just because you happen to have an array in WML.

[Inkerrio]

wml.variables['coordinate_list[' .. i .. ']'] = {x = loc[1], y = loc[2]} worked, thank you both!

Solved