Simple example of summon in area

[bomba]

Need a simple example to create monsters in certain area, like this:

local config = {
monster = "Rat",
ammout = 5,
topL = {x=100, y=100, z=7},
botR = {x=200, y=200, z=7}
}

 

[Mkalo]

for i = 1, config.amount do
    Game.createMonster(config.monster, Position(math.random(topL.x, botR.x), math.random(topL.y, botR.y), topL.z))
end

Ofc if you are using TFS 1.2 as you didn't specify.

 

[bomba]

I'm using 0.4.

 

[Mkalo]

There is no Position() in 0.4, you have to do {x=math.random(topL.x, botR.x), y=math.random(topL.y, botR.y), z=topL.z}

 

[Xikini]

math.random for z as well, in case they want to do multiple floors.

local config = {
     monster = "Rat",
     amount = 5,
     topL = {x = 100, y = 100, z = 7},
     botR = {x = 200, y = 200, z = 7}
}

for var = 1, config.amount do
     local pos = {x = math.random(config.topL.x, config.botR.x), y = math.random(config.topL.y, config.botR.y), z = math.random(config.topL.z, config.botR.z)}
     doCreateMonster(config.monster:lower(), pos)
end

 

[Codex NG]

There is no Position() in 0.4, you have to do {x=math.random(topL.x, botR.x), y=math.random(topL.y, botR.y), z=topL.z}

Isn't Position just a matter of,

function Position(a, b, c, d)
    return {x = (a > -1 and a < 65536) and a or 0, y = (b > -1 and b < 65536) and b or 0, z = (c > -1 and c < 16) and c or 7, stackpos = (d > -1 and d < 256) and d or 255}
end

Or is there more to it than that?

 

[Mkalo]

You have to set the metatable as well

 

[Codex NG]

You have to set the metatable as well

What else is there to position aside from using it as a function, i never actually seen it used for anything else aside from using it as a shortcut to setting the x,y,z and stackpos.

It is not inherited and each metatable has its own getPosition, but since it is 0.4 it can be used as global function.

    // Position
    registerClass("Position", "", LuaScriptInterface::luaPositionCreate);
    registerMetaMethod("Position", "__add", LuaScriptInterface::luaPositionAdd);
    registerMetaMethod("Position", "__sub", LuaScriptInterface::luaPositionSub);
    registerMetaMethod("Position", "__eq", LuaScriptInterface::luaPositionCompare);

    registerMethod("Position", "getDistance", LuaScriptInterface::luaPositionGetDistance);
    registerMethod("Position", "isSightClear", LuaScriptInterface::luaPositionIsSightClear);

    registerMethod("Position", "sendMagicEffect", LuaScriptInterface::luaPositionSendMagicEffect);
    registerMethod("Position", "sendDistanceEffect", LuaScriptInterface::luaPositionSendDistanceEffect);

 

[Mkalo]

What else is there to position aside from using it as a function, i never actually seen it used for anything else aside from using it as a shortcut to setting the x,y,z and stackpos.

Is getPosition a metamethod of Position?

https://github.com/otland/forgottenserver/wiki/Metatableosition
Those methods. Plus the metamethods of addition, subtraction and eq (==)

How to set Position in lua:
https://github.com/otland/forgottenserver/blob/master/src/luascript.cpp#L870-L880

You just have to set the metatable for the table like this:

function Position(x, y, z, stackpos)
    local t = {x=x, y=y, z=z, stackpos=stackpos or 0}
    return setmetatable(t, debug.getmetatable(Position))
end

^ Actually this may not work have to test it but however it would work if oyu have some dummy position like
local pos = Position(1, 1, 1)
debug.getmetatable(pos)