Create Teleportation manager that teleportation-enabled blocks can register to.
This must track location of the TileEntity, and those tile entities must unregister from the Manager when they die, (and register when they are created, as if from a load).
Create Teleportation manager that teleportation-enabled blocks can register to.
This must track location of the TileEntity, and those tile entities must unregister from the Manager when they die, (and register when they are created, as if from a load).