getComponent("Transform").get("localScale") access error

[AufderWelt]

Describe the bug the call

obj.getComponent("Transform").get("localScale") 

generates an error, if the object does not contain lua code. the call works, if the obj contains some lua code, for example "--"

To Reproduce opend a new singleplayer table. put this code in the Global

function onLoad()
  spawnParams = {
    type = "Card",
    callback_function = function(obj)
      log(obj.getScale())

      Wait.frames(function()
        log( obj.getComponent("Transform").get("localScale") )
      end, 1)
    end
  }
  spawnObject(spawnParams)
end

Expected behavior the obj.getComponent("Transform").get("localScale") should work, without the object containing lua code

Tabletop Simulator Info:

• OS: Windows
• Version 12.4.3

Known workarounds if lua code are injected into the object, the call works

function onLoad()
  spawnParams = {
    type = "Card",
    callback_function = function(obj)
      log(obj.getScale())

      obj.setLuaScript("--")
      Wait.frames(function()
        log( obj.getComponent("Transform").get("localScale") )
      end, 1)
    end
  }
  spawnObject(spawnParams)
end

Additional context the call lua obj.getComponents()[1].get("localScale") does not work. it does not matter, if the object contains lua code or not

Link to TTS post https://forums.tabletopsimulator.com/showthread.php?8928-obj-getComponent(-quot-Transform-quot-)-get(-quot-localScale-quot-)-access-error&p=28926#post28926

[Benjamin-Dobell]

Alternate work-around You can get at this scale without going through the Component API by using:

local function getObjectTransformScale(obj)
    local rotation = obj.getRotation()
    local onesVector = Vector(1, 1, 1):rotateOver('z', rotation.z):rotateOver('x', rotation.x):rotateOver('y', rotation.y)
    local scale = obj.positionToLocal(obj.getPosition():add(onesVector))
    return scale
end

[AufderWelt]

@Benjamin-Dobell the scale needs to be divided by 1, or? to get the same scale vector, which you get by the call obj.getScale()

[Benjamin-Dobell]

@AufderWelt Yeah, sorry, what I posted was the inverse scale of localScale, as that's just what I happen to use more frequently. If you want to directly calculate localScale I believe the following ought to do it:

local function getLocalScale(obj)
    local rotation = obj.getRotation()
    local onesVector = Vector(1, 1, 1):rotateOver('y', -rotation.y):rotateOver('x', -rotation.x):rotateOver('z', -rotation.z)
    local scale = obj.positionToWorld(onesVector):subtract(obj.getPosition())
    return scale
end

[Benjamin-Dobell]

If you happened to grab that right after I posted, I've just reversed the order of the rotateOver calls, as I believe this is correct now.

Admittedly, I've not really tested this, so may want to give it a go on some objects with different scalars for x, y and z components of the scale.