String

String is used for the crafting recipes of many tools and utilities. When placed as a block, string becomes tripwire.

Obtaining
String can be obtained from drops and fishing, and can be looted from jungle temples and dungeons.

Breaking
Tripwire can be instantly with any tool, dropping string.

Tripwire will also be removed and drop string as an item:
 * if a full solid opaque block (but not a transparent block) beneath it 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

Tripwire will be destroyed without dropping string if lava flows into its space.

Cobwebs
String can be obtained from breaking cobwebs with a sword or shears, as well as by the pushing of cobwebs by pistons and when water flows over cobwebs. In 1.9, shears no longer produce string when used on cobwebs, instead always dropping the cobweb as an item.

Drops
Spiders and cave spiders drop up to two pieces of string upon death.

Fishing
String can be obtained by fishing.

Natural generation
Five pieces of tripwire generate naturally in every jungle temple.

Usage
String can be used as a crafting ingredient and tripwire can be used as a redstone component.

Trading
Fisherman and fletcher villagers will buy 15-20 string for an emerald.

Redstone component
Tripwire can be used to detect entities as part of a tripwire circuit.


 * Placement


 * To place tripwire, string while pointing at a surface facing the space the tripwire should occupy.


 * Until 1.9, placement depends on the underlying block. When tripwire is placed on a full solid opaque block, it will lie flat "on the ground" (0.09375 or $3/32$ blocks high). When placed above a transparent block (including air), tripwire will float "in the air" (0.21875 or $7/32$ blocks high, but with a half-block-tall collision mask). Tripwire will connect to any adjacent tripwire or tripwire hooks facing the tripwire if they are also "in the air" or "on the ground", and can also be placed above or below other tripwire.


 * In order to activate tripwire hooks, tripwire 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. Until 1.9, all tripwire hooks and tripwire must either have solid blocks beneath them (producing a tripwire circuit on the ground) or above transparent blocks (producing a tripwire circuit in the air).


 * Activation


 * A tripwire activates if almost any entity (players, mobs, minecarts, boats, items, arrows, etc.) intersects its collision mask. The tripwire remains active until there are no entities intersecting its collision mask. Thrown potions, some arrows, thrown Ender pearls, and thrown eyes of ender will not activate tripwire.


 * Behavior


 * An active tripwire that is part of a valid tripwire circuit will cause the attached tripwire hooks to activate (producing redstone power). Active tripwires do not themselves produce redstone power.


 * When tripwire is broken (including by breaking a block beneath ground tripwire or by being washed away by spreading water) after being part of a valid tripwire circuit, it will activate the attached tripwire hooks for 5 redstone ticks (10 game ticks, or 0.5 seconds barring lag). It will not produce the signal if it is broken using shears.


 * A tripwire does not need to be part of a valid tripwire circuit to activate, but without valid attached tripwire hooks the activation or deactivation can only update adjacent blocks (for example, activating a BUD circuit).

ID
String has the ID name. Tripwire has the ID name  and is further defined by its block data. Tripwire also has a block state which is expected to replace the functionality of block data in a future version.

Gallery
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