Lua is heartburn

[wildcherrii]

how to get a neg random number?

 

Math:Random(-10,10)  produces error for me

 

 

 

 

[Genebris]

I don't know why it produces and error, but you can always use the good old classic way:

Math:Random(0,20) -10

Also, this is Leadwerks API method and Lua has it's own

math.random

Might be different, IDK.

[wildcherrii]

I got a pivot in the world , I've attached  a script to it, emit.lua

 

function Script:Start()

    --small box
    self.box=Model:Box()

end

function Script:UpdateWorld()

    self.MonitorBox()

end

 

Function Script:MonitorBox()

   self.box:Turn(0,1,0)

end

-------------------------------------------------------------------------------------

 

Please for the love of God, explain to me why this returns a " attempt to index field "box" a nil value.

Is it perhaps because Im using a custom named function?  Am i not allowed to make a function ? hrmmmp

Lua is such a ball slap, its horrible.  Nothing ever happens twice the same way, constantly having to restructure functions or  globals to get them to pick up elsewhere, then hope you don't break the entire code by changing the order to much.. blah blah..   

 

 

 

[reepblue]

This code should be safer. You also had a capital F for your custom function but that could have been due to auto correct.

Script.box = nil

function Script:Start()

    --small box
    self.box=Model:Box()

end


function Script:UpdateWorld()

    self:MonitorBox()

end

 

function Script:MonitorBox()

   if (self.box ~= nil) then self.box:Turn(0,1,0) end

end

I also don't like Lua because everything can be running fine until a random function triggers and crashes the app. This is one of the reasons I use C++. 

[Josh]

If you call a function like this in Lua it passes one argument to the function:

o.function(1)

If you call a function with a colon instead (:) it passes the object itself as an argument called self:, plus the other argument for the number one

o:function(1)

It's like the difference in C++ between a class method and static function.

Here is your working code:

function Script:Start()
    self.box=Model:Box()
end

function Script:UpdateWorld()
    self:MonitorBox()
end

function Script:MonitorBox()
   self.box:Turn(0,1,0)
end