LE3 FindChild Lua

[tjheldna]

Hi All,

 

Im having a little trouble with FindChild and Lua..

 

I have a function that mounts the inventory item to the player's hand which works fine see below.

 

function Script:MountCurrentWeapon()

 local currentItem = self.inventory:GetCurrentItem()
 self.mountedItem = Model:Load(currentItem.itemModelPath)
 local itemMountNode = self.mountedItem:FindChild("mountPoint")
 local playerMountNode = self.entity:FindChild("Bip001 R Hand")
 itemMountNode:SetParent(playerMountNode);
 itemMountNode:SetPosition(0,0,0);
 itemMountNode:SetRotation(playerMountNode:GetRotation())

end

 

I always need a reference to self.mountedItem so I can swap weapons etc. The problem is as soon as I parent the self.mountedItem to the hand. I can't find any of it's children anymore also self.mountedItem:CountChildren() returns 0.

 

Is this a lua thing? because I can do something similar in C++ it works fine. I'm just starting out using Lua so am I may be doing something wrong?

 

Also I can't seem to return the first object when using FindChild(). I have had to add an extra node when exporting which is the parent of "mountPoint".

 

Cheers

[Josh]

The behavior of the C++ and Lua API should match exactly.

[tjheldna]

Hi Josh

 

Just put together a little sample. Look at the outputs to the console.

 

 

function App:Start()
       --Create a window
       self.window = Window:Create()
       self.context = Context:Create(self.window)
       self.world = World:Create()
       local camera = Camera:Create()
       camera:SetRotation(35,0,0)
       camera:Move(0,0,-3)
       local light = DirectionalLight:Create()
       light:SetRotation(35,35,0)

       --Load a model
       self.entity = Model:Box()

       local child = Model:Box(1,1,1)
       child:SetColor(1.0,0.0,0.0)
       child:SetPosition(2,-2,0)
       child:SetKeyValue("name","MyBox1")

       child1 = Model:Box(1,1,1)
       child1:SetColor(0.0,1.0,0.0)
       child1:SetPosition(-2,-2,0)
       child1:SetKeyValue("name","MyBox2")

       child2 = Model:Box(1,1,1)
       child2:SetColor(0.0,1.0,0.0)
       child2:SetPosition(-2,-2,0)
       child2:SetKeyValue("name","MyBox3")

       child2:SetParent(child1)
       child1:SetParent(child)

System:Print("Value below.... should this be returning 3? now that box 1, 2, and 3 are parented")
System:Print(child:CountChildren())

--Find the first box should this work?
System:Print("Find the first box using FindChild")

local box = self.entity:FindChild("MyBox1")

if box then
       System:Print("MyBox1 Found")
else
       System:Print("Could not find MyBox1")
end

       return true
end

function App:Loop()

       if self.window:Closed() or self.window:KeyHit(Key.Escape) then return false end

       Time:Update()
       self.world:Update()
       self.world:Render()

       self.context:Sync()

       return true
end
end