Lua Beginner

Posted by AaronM86 on Mon 29 Mar 2010 07:04 PM — 17 posts, 65,159 views.

AaronM86 Mon 29 Mar 2010 07:04 PM #0

I was wondering if someone could help teach me how to define variables with Lua. Last night I just switched from Jscript to Lua and am trying to read up on tutorials and what not, but am having trouble finding this. I figure if I can get one thing figured out, it'll give a foundation for it in my mind and then I can expand my tinkering from there.

So, for an example, what I'm trying to do here is, I have an alias titled, "fd *". This used to set a variable titled, "fishDirection". I made this variable through the Variable submenu in my World Configuration. It used to work fine with Jscript, but I'm getting errors now.

The following is what I have edited the alias to thus far, trying to apply Lua to it.

<aliases>
<alias
match="fd *"
enabled="y"
expand_variables="y"
send_to="12"
sequence="100"
>
<send>SetVariable ("fishDirection", "%1" )
Note("fishDirection set to '" + "%1.'")
Send("look");</send>
</alias>
</aliases>

AaronM86 Mon 29 Mar 2010 08:45 PM #1

I had an idea I wanted to test, wondering if it might work, in Jscript I used to make functions and I could run them by using say Send: eightball(), and that would run the eightball function from my script notepad. Would the same thing work in Lua or is there a different way of writing it?

Nick Gammon Australia Forum Administrator Tue 30 Mar 2010 12:17 AM #2

Concatenation in Lua is .. rather than +

So it should read:


Note("fishDirection set to " .. "%1")

Although since wildcard strings are substituted you could just do:


Note("fishDirection set to %1")

As for calling the function, yes you can do it that way. Another way is to put "eightball" in the "script" box of the trigger. But I assume your question is for calling maybe different functions here and there.

AaronM86 Tue 30 Mar 2010 12:24 AM #3

Excellent :D This was great help and it will surely get me on my way to putting other puzzles together. Thank you for taking your time to help me.

AaronM86 Wed 31 Mar 2010 04:59 AM #4

Hello, was wondering if I could get a little assistance with a chat redirector script that I started to have troubles with after I set it to keep evaluating, as I needed to make another "say" trigger recently and couldn't get it to fire unless I had set my plugin's redirector script logging my says orginally to keep evaluating also. The trigger in the plugin looks like this.


<triggers>
  <trigger
   enabled="y"
   keep_evaluating="y"
   match="^\((.*)\/(.*)\)\:(.*)$"
   omit_from_output="y"
   regexp="y"
   script="redirect"
   sequence="100"
  >
  <send></send>
  </trigger>

  <trigger
   enabled="y"
   keep_evaluating="y"
   match="^(.*?) (say|ooc|yell|shout|ghosttalk|tell|newbiechat|war)(.*?)$"
   omit_from_output="y"
   regexp="y"
   script="redirect"
   sequence="100"
  >
  </trigger>
</triggers>

What is happening is, when I send a chat with mixed words in the trigger it will send my message twice. For example:

I type 'guildchat ooc'

(Terkal/[+} Sovereign {+]): ooc
(Terkal/[+} Sovereign {+]): ooc

Above is what is sent to my chatworld, and the double message is sent to all guild members.

Nick Gammon Australia Forum Administrator Wed 31 Mar 2010 05:12 AM #5

They both call "redirect" so it sends the stuff twice. Make only one of them call redirect, the other one can call something else.

AaronM86 Wed 31 Mar 2010 05:29 AM #6

Hrm, never had that problem anytime before and they were always set to run the same thing, this only started happening when I added the keep evaluating here:

keep_evaluating="y"
match="^(.*?) (say|ooc|yell|shout|ghosttalk|tell|newbiechat|war)(.*?)$"
omit_from_output="y"

Regardless, I went ahead and change it to a different call name for both and it is still having the same results of double sending.

<trigger
enabled="y"
match="^$(.*)\/(.*)$\:(.*)$"
omit_from_output="y"
regexp="y"
script="redirecty"
sequence="100"
>

That is the change I made to the call of the first one.

AaronM86 Wed 31 Mar 2010 05:35 AM #7

My problem may lie directly within the script itself, I had to add a redirecty function.

<script>
<![CDATA[
chat_world = "Dark-Legacy Chats"
local first_time = true

function redirect (name, line, wildcards, styles)

local w = GetWorld (chat_world)

if first_time and not w then
local filename = GetInfo (67) .. chat_world .. ".mcl"
Open (filename)
w = GetWorld (chat_world)
if not w then
ColourNote ("white", "red", "Can't open chat world file: " .. filename)
first_time = false
end
end

if w then
for _, v in ipairs (styles) do
w:ColourTell (RGBColourToName (v.textcolour),
RGBColourToName (v.backcolour),
v.text)
end
w:Note ("")

end

end

function redirecty (name, line, wildcards, styles)[

local w = GetWorld (chat_world)

if first_time and not w then
local filename = GetInfo (67) .. chat_world .. ".mcl"
Open (filename)
w = GetWorld (chat_world)
if not w then
ColourNote ("white", "red", "Can't open chat world file: " .. filename)
first_time = false
end
end

if w then
for _, v in ipairs (styles) do
w:ColourTell (RGBColourToName (v.textcolour),
RGBColourToName (v.backcolour),
v.text)
end
w:Note ("")

end

end

]]>
</script>

AaronM86 Wed 31 Mar 2010 05:37 AM #8

function redirecty (name, line, wildcards, styles)[

I removed "[" and got it to load right, typo error on my part. But it's still doing the double send, hrm *ponder*...

Nick Gammon Australia Forum Administrator Wed 31 Mar 2010 09:34 AM #9

AaronM86 said:

Hrm, never had that problem anytime before and they were always set to run the same thing, this only started happening when I added the keep evaluating here:

Well previously, only one trigger fired. Now two fire and they both call the same function so it does its stuff twice.

AaronM86 Wed 31 Mar 2010 06:30 PM #10

Hello, I've converted all my old jscript into lua and organized all my triggers into one file, organized by group name. Made an alias to turn off entire group names at a time, works very efficiently! :D One question I was wondering about, however:

<triggers>
<trigger
enabled="y"
expand_variables="y"
group="Looting"
match=" *an ancient tome of knowledge*"
send_to="12"
sequence="100"
>
<send> world.Send("get all.tome @trapp")
if string.lower("%2") == "1" then
world.Send("exam tome")
elseif string.lower("%2") == "2" then
world.Send("exam tome")
world.Send("exam tome")
end</send>
</trigger>
</triggers>

Will using @trapp in the world.Send still fire the variable correctly in this circumstance?

Nick Gammon Australia Forum Administrator Thu 01 Apr 2010 05:03 AM #11

Yes but I don't understand why you are doing this:


if string.lower("%2") == "1" then

The number 1 doesn't have an upper and lower-case version, so changing the case doesn't achieve anything.

Twisol USA Thu 01 Apr 2010 07:13 AM #12

I told him to use it in an earlier topic (where case was important), and he probably just modified what he knew worked. It's how you learn! :) But yeah, Nick's right. 1 has only one "case", so you shouldn't have to lowercase anything you're comparing against it.

AaronM86 Thu 01 Apr 2010 12:51 PM #13

Nod, Twisol, that is the case. Without using the string check, just to confirm, would I write it like this:

if("%2") == "1" then

Thank you both again, especially for your time and patience; you have been loads of support.

AaronM86 Thu 01 Apr 2010 01:33 PM #14

Hello and good morning :)

Was hoping to get a little assistance, I've been searching through the list of functions to try and piece this all together. My goal is to have an alias that will Note a list to the world of all my triggers, by group name, that are enabled/disabled. Have one note for all that trigger groups that are enabled and another note for all that are disabled.

I've narrowed it down, to guessing, that I have to use some sort of combination of:

tl = GetTriggerList()
if tl then
for k, v in ipairs (tl) do
Note (v)
end -- for
end -- if we have any triggers

/

Note (GetTriggerOption ("mytrigger", "match"))

"group": (string - group name)
"enabled": y/n - trigger is enabled

/

Note (GetTriggerInfo ("monster", 2))

8: Enabled (boolean)
26: Group name (string)

Those are just copy/pastes of the function examples from the website here. Am I on the right track with guessing these are the functions I would have to use to accomplish my goal?

Nick Gammon Australia Forum Administrator Thu 01 Apr 2010 09:48 PM #15

Yes you are on the right track. Combined with a bit of table handling. This should do it:


<aliases>
  <alias
   match="show_groups"
   enabled="y"
   send_to="12"
   sequence="100"
  >
  <send>

local tl = GetTriggerList()
if not tl then
  print "No triggers"
  return
end -- if

local groups = {}

-- work out which ones enabled 

for k, v in ipairs (tl) do

  local group = GetTriggerOption (v, "group")
 
  -- create table entry for this group first time around
  groups [group] = groups [group] or { enabled = 0, disabled = 0 }
 
  if GetTriggerOption (v, "enabled") == 1 then
    groups [group].enabled = groups [group].enabled + 1
  else
    groups [group].disabled = groups [group].disabled + 1
  end -- if

end -- for

-- show results, per group

for k, v in pairs (groups) do
  ColourTell ("white", "", string.format ("%%15s: ", k))
  if v.enabled &gt; 0 then
    ColourTell ("green", "", string.format ("%%i enabled ", v.enabled))
  end -- if
  if v.disabled &gt; 0 then
    ColourTell ("yellow", "", string.format ("%%i disabled ", v.disabled))
  end -- if
  Note ""  -- new line

end -- for

</send>
  </alias>
</aliases>

For advice on how to copy the above, and paste it into MUSHclient, please see Pasting XML.

A whole group is not necessarily enabled (so this alias shows, per group, how many in that group are enabled and how many disabled).

AaronM86 Thu 01 Apr 2010 10:18 PM #16

Ah, excellent! I had attempted to set this up all morning lol, kept running into a bit of trouble. I see what I was doing wrong now. Thanks :D Appreciate it a ton.