Solved Vehicle collisions (Lua)

Put simply, how can I check whether a collision has occurred between two vehicles?

I have found this in the campaigns for chapter1 which would seem to do the trick (chapter1_walljump.lua):

Code:

local function onObjectCollision(objA, objB)
  -- log('A', logTag, 'onObjectCollision called objA : '..objA..', objB: '..objB)
  local wall = scenetree.findObject(wallInstance)
  if wall then
    local wallID = wall:getID()
    if wallID == objA or wallID == objB then
      playerHitTheWall = true
    end
  end
end

However, this never runs when adapted for my code (quick debug message to show current state):

Code:

local function onObjectCollision(objA, objB)
    helper.flashUiMessage('Triggering!', 1)
end

M.onObjectCollision = onObjectCollision
return M

Is there something I need to trigger it?

Thanks for any help.

 

Yes. I am not sure why it doesn't work either; I feel like I have done something really stupid here but can't seem to find out what that something is...

 

Thank you for your help! How can I access the objectCollisions attribute for the specified vehicle?