Tripwire Hook

Tripwire Hook

Transparency	Yes
Luminance	No
Blast resistance	0
Tool	Any tool
Renewable	Yes
Stackable	Yes (64)
Flammable	No
Drops	Itself
Data value	dec: 131 hex: 83 bin: 10000011
Name	tripwire_hook

This article is about the hooks. For the tripwire connecting the hooks, see String#Redstone component.

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

Obtaining

Breaking

To remove a tripwire hook, mine it. Tripwire hooks can be broken instantly using any tool, or without a tool.

A tripwire hook will also be removed and drop itself as an item if:

• its attachment block is moved, removed, or destroyed
• water flows into its space
• 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.

Crafting

Ingredients	Crafting recipe
Iron Ingot + Stick + Any Wood Planks	2

Fishing

Tripwire hooks can be obtained as a "junk" item from fishing.

Natural generation

Four tripwire hooks are generated naturally in each jungle temple.

Usage

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

Crafting ingredient

Tripwire hooks can be used to craft trapped chests.

Name	Ingredients	Crafting recipe
Trapped Chest	Tripwire Hook + Chest

Redstone component

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 Place Block control.

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, with both tripwire hooks facing the tripwire.

To place tripwire, use the Place Block control with a string. Tripwire in a valid tripwire circuit has a short hitbox (0.09375 or 3/32 blocks high, with the bottom 0.0625 or 1/16 blocks above the block below), while tripwire not in a valid tripwire circuit has a taller hitbox (0.5 blocks high, bottom not raised).

The three states of a tripwire hook: not attached (folded), attached (straight), activated (depressed).

A tripwire hook in an invalid tripwire circuit appears "folded", while a tripwire hook in a valid tripwire circuit appears extended straight. Tripwire lines from separate tripwire circuits can be placed next to each other (in parallel), above each other, and even intersecting each other.

Activation

A tripwire hook in a valid tripwire circuit activates 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 that will not activate a tripwire circuit include thrown potions, some arrows, fireworks, 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 breaking 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 appears to move downwards and it:

• powers any adjacent redstone dust to power level 15, including beneath the tripwire hook
• powers any adjacent redstone comparators or redstone repeaters facing away from the tripwire hook to power level 15
• strongly powers its attachment block to power level 15
• activates any adjacent mechanism components, including above or below, such as pistons, redstone lamps, etc.

Tripwire produces no power itself, but its state change can be detected with an observer.

Although destroying tripwire with shears will not activate a tripwire hook, it will change the tripwire hook's block state (its "attached" state from true to false) which can be detected with an observer.

Data values

A tripwire hook has an ID name of tripwire_hook and is further defined by its block data. A tripwire hook also has a block state which is expected to replace the functionality of block data in a future version.

Block data

See also: Data values

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

Bits	Values
0x1 0x2	A two-bit field 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)

Block state

See also: Block states

Name	Value	Description
attached	true false	True if the tripwire hook is connected to a valid tripwire circuit.
facing	north south east west	The direction in which the tripwire hook juts out from the block it is attached to. For example, a tripwire hook facing north will be attached to a block to its south.
powered	true false	True if the tripwire hook is active.

History

Official release
1.3.1			May 28, 2012		Dinnerbone released a series of cryptic tweets, starting with "I think I'm taking a big liking towards adventure maps. It's starting to show in my choice of new blocks." He hinted at shears being used to disable the tripwire, then posted a series of images before revealing the name. Afterwards, he posted a video to reveal the functionality of the tripwire and finally credited the idea to his fiancee MissMarzenia.
			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.
1.9			15w49a		The suspended block state is removed from tripwire hook.
Pocket Edition Alpha
0.13.0			build 1		Added tripwire hooks. They are used to craft trapped chests.
Legacy Console Edition
TU14	CU1	1.04	Patch 1		Added tripwire hooks.

Issues

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

Gallery

• 

  The first image of tripwires released by Mojang.

• 

  The second image of tripwires released by Mojang.

• 

  The third image of tripwires released by Mojang.

• 

  A comparison between a tripwire hook and a lever released by Mojang.

References

Redstone

View at: Template:Redstone/content [edit]

Blocks

View at: Template:Blocks/content [edit]