Got the basic webar demo running where the T-Rex appears when you hit "start"
However, seems that the demo's code (SimpleThreeJS) just spawns a T-Rex on the center of the screen and pinned to the camera on button press (and if all the API keys / secrets are correct). Can't seem to find how to spawn the T-Rex only if a certain tracker is located and to pin that model to the location in the AR space where that tracker appears. Any help will be great. I'm assuming it has something to do with the (msg) object, but not sure.