loading WML from a file into a table

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SigurdFireDragon
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loading WML from a file into a table

Post by SigurdFireDragon » February 28th, 2011, 3:18 am

for my campaign I decided it would be useful if I could read the faction files in {multiplayer/factions} and put the contents of a [multiplayer_side] tag into a lua table, and then send the contents of some of the keys into wesnoth variables.

currently, I tried the following inside a WML [event]:

Code: Select all

[set_variable]
	name=Default_Era_Undead
	[value]
		{multiplayer/factions/undead-aoh.cfg}
	[/value]
[set_variable]

[lua]
	code=<<
		faction_table = wesnoth.get_variable("Default_Era_Undead")
		wesnoth.set_variable("faction_name", faction_table.id)
	>>
[/lua]
and then some WML code to put the contents of "faction_name" on the screen (should put "Undead" on the screen if it works (the contents of the 'id' key in the file read)

it gave the following error:
[string "..."]:3: attempt to index local 'faction_table', nil value
and then some tracebacks.

I'm getting the sense that the contents of undead-aoh.cfg were put into scalar instead of a table, but I'm not sure how to set it up for it to go into a table.

How would I do that?

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Sapient
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Re: loading WML from a file into a table

Post by Sapient » February 28th, 2011, 4:59 am

I think you meant to write set_variables, not set_variable.
http://www.wesnoth.org/wiki/User:Sapient... "Looks like your skills saved us again. Uh, well at least, they saved Soarin's apple pie."

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SigurdFireDragon
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Re: loading WML from a file into a table

Post by SigurdFireDragon » February 28th, 2011, 6:22 am

changing [set_variable] to [set_variables] got rid of the error code, but "faction_name" still isn't being loaded with the desired data. :hmm:
is the fact that I'm running this code under a SP Campaign have anything to do with anything?

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zookeeper
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Re: loading WML from a file into a table

Post by zookeeper » February 28th, 2011, 6:38 am

You're forgetting that all the keys are inside a [multiplayer_side] tag. Presumably changing wesnoth.set_variable("faction_name", faction_table.id) to wesnoth.set_variable("faction_name", faction_table.multiplayer_side.id) would work.

However, you don't need Lua for that:

Code: Select all

[set_variables]
   name=Default_Era_Undead
   [value]
      {multiplayer/factions/undead-aoh.cfg}
   [/value]
[set_variables]

{VARIABLE faction_name $Default_Era_Undead.multiplayer_side.id}

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SigurdFireDragon
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Re: loading WML from a file into a table

Post by SigurdFireDragon » February 28th, 2011, 6:52 pm

:doh: misreading the wiki caused me to think lua was necessary.

looks like what I want to do might be possible using only WML, this question should settle it:

I want:
Default_Era_Undead.multiplayer_side.image=units/undead-necromancers/lich.png
(or in some other variable)
so I can do:
message="&$Default_Era.multiplayer_side.image~RC(magenta>red)"
but i am running into problems because:
Default_Era_Undead.multiplayer_side.image="units/undead-necromancers/lich.png"
and it looks like there is no way to strip the " (double quotes) from the variable value. Do I need lua to strip the " ?

Luther
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Re: loading WML from a file into a table

Post by Luther » February 28th, 2011, 7:23 pm

As far as I know, there's no way to store an image in a variable. What are you trying to do, exactly?

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zookeeper
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Re: loading WML from a file into a table

Post by zookeeper » February 28th, 2011, 7:24 pm

SigurdTheDragon wrote::doh: misreading the wiki caused me to think lua was necessary.

looks like what I want to do might be possible using only WML, this question should settle it:

I want:
Default_Era_Undead.multiplayer_side.image=units/undead-necromancers/lich.png
(or in some other variable)
so I can do:
message="&$Default_Era.multiplayer_side.image~RC(magenta>red)"
If you meant image="$Default_Era_Undead.multiplayer_side.image~RC(magenta>red)", then yes.
SigurdTheDragon wrote:but i am running into problems because:
Default_Era_Undead.multiplayer_side.image="units/undead-necromancers/lich.png"
and it looks like there is no way to strip the " (double quotes) from the variable value. Do I need lua to strip the " ?
Quotes simply enclose values, they're not part of them. You don't ever need to strip quotes.

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SigurdFireDragon
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Re: loading WML from a file into a table

Post by SigurdFireDragon » February 28th, 2011, 8:58 pm

Ok, here's what was going wrong with my testing.

Code: Select all

	[set_variable]
		name=faction_pic
		value=$Default_Era_Undead.multiplayer_side.image
	[/set_variable]
	[message]
		speaker=narrator
		message="&$faction_pic~RC(magenta>red)=undead="
		[option]
			message="&$faction_pic~RC(magenta>red)=undead="
		[/option]
	[/message]
the first message key throws up a conains invalid wml error, the second one works as intended to display a pic. the "=" is necessary for the second to display properly.
I was just using the above minus the option tag to test the code form.
I had assumed that the message key in each place was identical in behavor. also for a while I didn't realize the = was needed

since how it works in the [option] tag is what I was looking to do, that solves my question.

I guess I didn't need lua after all. Thanks, everyone

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