I was thinking about the potential for hidden doors with pistons when I realized some problems:
Pistons can't move a block more than one space without putting a bunch of blocks behind it. This leaves no room to enter the hidden passage.
You can't move blocks above or below the piston forward without placing a wall of immobile pistons. This also leaves no room for entry.
Pistons can't bring the blocks back without more pistons on the other side. This ruins the "hidden" part of the door.
I came up with an idea for a block that can get around these issues. I'm calling it the "mover block" for now.
This block would be attracted to redstone torches, moving towards the nearest powered one.
The mover block would have one sticky side which would attach to other blocks, allowing that block to be pulled along when the mover moves backwards. The direction of the sticky side could be switched around much like the direction of the piston.
Mover blocks will always stick to other mover blocks, regardless of sticky side, allowing them to move in a mobile wall formation.
Here's a side-view diagram of mover blocks used to make a hidden door:
= mover
= redstone dust
= redstone torch (on side of block, forming a Not gate)
When the power state changes the wall moves in unison from one torch to another, opening the passage by moving the wall into the middle of the hallway. Switching the power state back closes the passage again.
Edit: This idea is mostly useless now with the idea of sticky pistons. It's still an interesting concept for moving entities.
I was wondering whether or not sticky blocks and mover blocks should be two separate blocks. This would require the hidden doors to be thicker, though.
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Mostly moved on. May check back a few times a year.
I came up with an idea for a block that can get around these issues. I'm calling it the "mover block" for now.
Here's a side-view diagram of mover blocks used to make a hidden door:
= mover
= redstone dust
= redstone torch (on side of block, forming a Not gate)
When the power state changes the wall moves in unison from one torch to another, opening the passage by moving the wall into the middle of the hallway. Switching the power state back closes the passage again.
Edit: This idea is mostly useless now with the idea of sticky pistons. It's still an interesting concept for moving entities.
Mostly moved on. May check back a few times a year.
Mostly moved on. May check back a few times a year.