Development Preview of LUA-Engine

[Cromon]

Ahoy everyone

Ive been now in the emulation world since a while (lets say about 4 years) and a lot people asked me before if id make a lua engine for mangos or trinity. So far i wasnt interested at all but yesterday i thought it might be a funny thing working once again with LUA as i remembered some fun times working with luabind in my own emulator years ago. So i started this morning implementing the stuff in trinity (after struggling with trinity yesterday evening till 3am...) and things go pretty fast.

Currently exported are about 400 functions from the player class, all the stuff that the server calls in PlayerScript's and WorldScript's can be registered from LUA as well as the whole gossip system.

Here is just an example script which shows some functions:

function OnMotdChanged(motd)
	print("New motd: " .. motd)
end

function OnHandleChat(plr, type, lang, message)
	print("A wild chat message appears: " .. message)
end

function GossipHello(plr, creature)
	menu = GossipMenu(creature, plr, 1)
	menu:AddMenuItem(GossipMenu.IconTaxi, 1, "A wild gossip menu appears")
	menu:AddMenuItem(GossipMenu.IconBattle, 2, "Another wild gossip menu appears")
	menu:Send()
end

function GossipSelect(plr, creature, id)
	if(id == 1) then
		plr:Say("I have selected item 1", 0)
	end
	if(id == 2) then
		plr:Yell("I have selected item2", 0)
	end

	plr:Yell("Im at " .. plr.X .. "/" .. plr.Y .. "/" .. plr.Z, 0)
	plr:CloseGossip()
end

RegisterMotdChanged("OnMotdChanged")
RegisterOnChat("OnHandleChat")
RegisterGossipScript("testGossipLUA", "GossipHello", "GossipSelect")

Ill keep you up to date in this thread and i guess i can make a first release this weekend with already a lot of stuff implemented.

Greetings
Cromon

[Chrispee]

OMG nice work bro +rep from me

[Toshix]

Where to see what you promised?

[stoneharry]

You should have used the same function names/syntax as the ArcEmu Lua for the sake of consistency and cross-platform support.

[myran2]

You should have used the same function names/syntax as the ArcEmu Lua for the sake of consistency and cross-platform support.

I'm not sure that would work because arcemu and trinity have different functions that do the same things.
Also, is this project still being worked on? It could be really neat to see a finished product.

[stoneharry]

I'm not sure that would work because arcemu and trinity have different functions that do the same things.
Also, is this project still being worked on? It could be really neat to see a finished product.

What difference does that make? The core functions are still manipulating the same game. When you call a Lua method all it does is call a C++ function that has been defined within the Lua engine, so just have the C++ call the appropriate values/functions to create the desired effect.

There was another two people working on a Lua engine for TrinityCore, but abandoned it due to a lack of time. They mirror'd the ArcEmu method list and had most unit methods done.

[myran2]

What difference does that make? The core functions are still manipulating the same game. When you call a Lua method all it does is call a C++ function that has been defined within the Lua engine, so just have the C++ call the appropriate values/functions to create the desired effect.

There was another two people working on a Lua engine for TrinityCore, but abandoned it due to a lack of time. They mirror'd the ArcEmu method list and had most unit methods done.

I guess that's true, but the way I understand it is that both Cromon and Pradox (Not sure if I got his name right, the guy who made the new Lua engine for arc) are just mirroring C++ functions in Lua.
Say arc has a function called "SummonNPC(int id, int x, int y, int z)". Trinity also has a function for summoning NPCs, but it's SummonNPC(int x, int y, int z, int orientation, int id, int phase, char scriptName).
You can't really port over a script that is using SummonNPC(int id, int x, int y, int z) to trinity's version without adding more data.

I might be completely wrong, but this is how I understood it when I looked into it.

[matin2gray]

So...good luck for you!!

[Raz3rr]

Sounds amazing! Good luck!