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Tripwire Hook

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[edit]Tripwire Hook
Tripwire Hook.gif
Tripwire Hook
Type

Non-solid block

Physics

No

Transparency

Yes

Luminance

No

Blast resistance

0

Hardness

0

Tool

Any tool

Renewable

Yes

Stackable

Yes (64)

Flammable

No

First appearance

1.3.1 (12w22a)

Drops

Itself

Data value

dec: 131 hex: 83 bin: 10000011

Name

tripwire_hook

A tripwire hook is a non-solid block that can be used to detect entities (players, mobs, items, etc.) when part of a tripwire circuit.

Obtaining[edit]

Tripwire hooks can be broken using any tool, or without a tool.

Crafting[edit]

Ingredients Crafting recipe

Iron Ingot +
Stick +
Any Wood Planks


Iron Ingot
Grid layout Arrow (small).png Tripwire Hook2

Stick

Oak Wood PlanksSpruce Wood PlanksBirch Wood PlanksJungle Wood PlanksAcacia Wood PlanksDark Oak Wood Planks

Natural generation[edit]

Two tripwire hooks are generated naturally in each jungle temple.

Fishing[edit]

Tripwire hooks are a junk item that can be obtained from fishing.

Usage[edit]

Tripwire hooks can be used as crafting ingredients or as redstone components.

Crafting ingredient[edit]

Tripwire hooks can be used to craft trapped chests.

Name Ingredients Crafting recipe

Trapped Chest

Tripwire Hook +
Chest




Grid layout Arrow (small).png Trapped Chest
Tripwire Hook Chest



Redstone component[edit]

See also: Redstone circuit

A tripwire hook can be used to detect mobs, items, and other entities over a large area.

Placement
To place a tripwire hook, use the "Use Item/Place Block" control (right-click, by default).
A tripwire hook can be attached to the side of any full solid opaque block.
In order to function correctly, a tripwire hook must be part of a "tripwire circuit": a straight line of blocks consisting of a block with a tripwire hook attached to it, a "tripwire line" (1 to 40 blocks of tripwire), and a second tripwire hook attached to another block.
To place tripwire, right-click on an adjacent block with a string. Tripwire can be placed "on the ground" or "in the air", and will only form a valid tripwire line if all the tripwire is of the same type. Tripwire is considered on the ground if placed on any opaque block, or on a block of redstone, a hopper, an upside-down slab, or an upside-down stairs. Tripwire is considered in the air if placed on any other block, or above air. Tripwire on the ground has a short hitbox (0.125 blocks high), while tripwire in the air has a taller hitbox (0.5 blocks high).
If the attachment block under ground tripwire is removed, the tripwire will be destroyed and drop itself as string.
A tripwire circuit is placed correctly when the tripwire hooks are fully extended and the tripwire line runs continuously between the tripwire hooks. Tripwire lines from separate tripwire circuits can be placed next to each other (in parallel), above each other, and can even intersect each other.
Activation
A tripwire hook in a valid tripwire circuit actives when certain entities (players, mobs, items, etc.) intersect the tripwire hook's tripwire line "hit box" (but not the tripwire hook itself), and deactivates when all entities leave or are removed from the tripwire line.
Entities which will not activate a tripwire circuit include: thrown potions, some arrows, thrown ender pearls, and thrown eyes of ender.
A tripwire hook also activates for 5 redstone ticks (0.5 seconds, barring lag) when any of its tripwires are destroyed, except when shears are used to destroy the tripwire.
Breaking the tripwire hook, or the block it is attached to, does not generate a pulse.
Behavior
The tripwire hooks and the blocks they are attached to provide power, but the tripwire does not.
While active, a tripwire hook:
Tripwire produces no power itself.
Although destroying tripwire with shears will not activate a tripwire hook, it will change the tripwire hook's block data (from "connected" to not "connected") which can be detected with a block update detector (BUD). In addition, every time a tripwire hook receives a block tick (a random update that occurs in up to three block in each chunk section every game tick, and on average affects any particular block every 47 seconds), the tripwire hook and its attachment block will produce a redstone update which can also be detected with a BUD.
Removal
To remove a tripwire hook, use the "Attack/Destroy" control (left-click, by default). Removing a tripwire hook takes no time and it will drop itself as an item.
A tripwire hook will also be removed and drop itself as an item:
  • if its attachment block is moved, removed, or destroyed
  • if water flows into its space
  • if a piston tries to push it or moves a block into its space
A tripwire hook will be destroyed without dropping itself as an item if lava flows into its space.

Data values[edit]

A tripwire hook's block data stores its orientation, connection status, and activation status:

Bits Values
0x1
0x2

Two bits storing a value from 0 to 3:

  • 0: Tripwire hook on block side facing south
  • 1: Tripwire hook on block side facing west
  • 2: Tripwire hook on block side facing north
  • 3: Tripwire hook on block side facing east
0x4 If set, the tripwire hook is connected and ready to trip ("middle" position).
0x8 If set, the tripwire hook is currently activated ("down" position)

An activated hook will normally have a value of 0xC, meaning "connected" and "activated".

Video[edit]

History[edit]

On May 28, 2012, Dinnerbone began tweeting of a new idea he had. He began posting pictures and eventually released a video on tripwires. Before this, the player could not place string on the ground. Dinnerbone credited the idea to his fiancee MissMarzenia.

Official release
1.3.1 12w22a Added tripwire hooks.
1.5 13w01a Tripwire Hooks are used to craft Trapped Chests.
1.7.2 13w36a Tripwire Hooks can be obtained as one of the "junk" items by fishing.
1.8 14w11a The model was slightly changed.
14w17a The model was changed: the stick is now affected by the Smooth Lighting option, the iron is bigger, and the top, side, and stick textures were slightly changed.
Console Edition
TU14 Added tripwire hooks.

Issues[edit]

Issues relating to "Tripwire" are maintained on the issue tracker. Report issues there.

Gallery[edit]