Redstone “Matcher” component

A two faced component that emits a signal if both faces see the same item.

• Strength of signal is relative to distance between matched items.
• If a face is looking at a hopper it sees the next item the hopper would drop.
• If it is looking at a filled item frame it sees the item in the frame.
• If a player/mob/etc. moves to block the field of view the signal stops.
• If both faces are looking at the same mob the signal is active.
• Faces can see through glass unless the glass is in “dropped” form such as in a hopper or frame.

This would enable better sorting as well as new kinds of traps.