Tube Projector

A Tube Projector creates a form of a shield or forcefield.

GUI Usage
In the GUI, you can toggle to have the tube centered, so the tube extends equally on each side of the projector, or you can toggle it to "front," meaning the length of the tube only extends on one side of the projector. You can increase the length up to 32 blocks, and/or the radius up to 5 blocks.

If the tube projector is on the same core as another projector, then the Holllow interior of the tube will override the other forcefield; allowing you to create an entrance in a shield without switching it off.

As the projector being in the middle of the tube, entrances are partially obstructed by the projector itself. If the tube projector is powered by a different core, then they will intersect like normal and not open a gap in the field, so you cannot force a way through someone else's shield without a Frequency card from the same Core.