Using Simultaneous localization and mapping (SLAM) or mapping a room (creating a 3D point cloud) or environment with Metaio Toolbox could be a solution to the challenge of using markers placed on the floor to trigger and then engage with an augment containing a 3D object modelled to scale.
![point_cloud_room_mapping](https://i0.wp.com/rowanpeter.com/wp-content/uploads/2013/10/point_cloud_room_mapping.jpg?resize=580%2C275)