Is a redstone device with the function of tracking mobs within its vision. It has a GUI screen in which items for it to "track" are held. Specific quantities can be specified by placing multiple of the item inside the block. The seeker will give off a redstone signal if there is at least the contents of its GUI visible in front of it. For example, if two emeralds and one sheep egg are inside a seeker, the seeker will only give off a redstone signal if it sees at least two emeralds and one sheep (mob or egg). Players in general would be tracked with mob heads; a Player Head would count as any player, whereas a specific Player Head would only count that player. To determine what percent of the seeker's contents are visible, placing a comparator aside the seeker will emit a signal within 0-15 blocks strong (0 being 100% false, 15 being 100% true).
A seeker
How to craft a seeker: A seeker can be made with 7 cobblestone, 1 redstone dust, and 1 eye of ender.
The GUI screen: A seeker's GUI screen is identical to a hopper's aside from the label on the top and its function. If a player is making a device in which it tracks all 6 spiders and 2 skeletons in the room to detect when the player has killed them all in order for the door to the next room to open up, they would place a seeker (visible) in the wall, place 6 spider eggs inside, and 2 skeleton eggs inside. The seeker would then be adjacent to a comparator which is followed by a repeater. At the end of the repeater, a NOT gate would continue the signal and be wired to the door. Therefore, when the contents are 100% false (no spiders or skeletons), the signal will not be inverted, thus opening the door to the next room. If the device were to be part of the player's adventure map, then players wouldn't be able to remove the contents of the seeker because you cannot be in adventure mode to open one.
I don't think I missed anything, but if something seems left untold, please let me take note!
The catch to a seeker is: it can only be opened in Creative when OP, sort of like a Command Block. That way (since the block has to visible in the wall) players can't remove the eggs from the mapmaker's seekers.
Edit: I mean adventure mode can't open it. Oops XD
A seeker can be made with 7 cobblestone, 1 redstone dust, and 1 eye of ender.
The GUI screen:
A seeker's GUI screen is identical to a hopper's aside from the label on the top and its function. If a player is making a device in which it tracks all 6 spiders and 2 skeletons in the room to detect when the player has killed them all in order for the door to the next room to open up, they would place a seeker (visible) in the wall, place 6 spider eggs inside, and 2 skeleton eggs inside. The seeker would then be adjacent to a comparator which is followed by a repeater. At the end of the repeater, a NOT gate would continue the signal and be wired to the door. Therefore, when the contents are 100% false (no spiders or skeletons), the signal will not be inverted, thus opening the door to the next room. If the device were to be part of the player's adventure map, then players wouldn't be able to remove the contents of the seeker because you cannot be in adventure mode to open one.
I don't think I missed anything, but if something seems left untold, please let me take note!
THANK YOU
The catch to a seeker is:
it can only be opened in Creative when OP, sort of like a Command Block. That way (since the block has to visible in the wall) players can't remove the eggs from the mapmaker's seekers.Edit: I mean adventure mode can't open it. Oops XD