结构和行为

A first glance at the sign format

A sign is always structured the same way. The first line contains either cart or train depending on if you want to target each cart separately or the train as a whole. You can then optionally specify the way the sign responds to redstone and what direction the train must be coming from.

Redstone

TrainCarts signs require Redstone power to function. This means signs will not do anything unless you put a redstone torch or other power signal next to it. If you want to use signs without adding redstone torches, you can make use of a special syntax on the first line, which is the same for [train] and [cart]. Generally you will want to use [+train] to make the sign function.

TrainCarts Sign Power Modes
First Line	Explanation
[train]	The default mode. Sign only works when redstone power is provided
[+train]	Always on power mode. Signs works all the time regardless of whether redstone power is provided
[!train]	Inverted power mode. Sign works all the time and turns off when redstone power is provided. Works the same as [+train] when no redstone torch is used.
[-train]	Always off power mode. Signs don't respond to redstone power. Only useful for the switcher sign.
[/train]	On-pulse power mode. Signs only activate once when redstone power goes from off to on, and don't respond to trains riding over it
[\train]	Off-pulse power mode. Signs only activate once when redstone power goes from on to off, and don't respond to trains riding over it
[/\train]	Redstone change power mode. Signs only activate once when redstone power switches state, and don't respond to trains riding over it

Lever Output

Signs can output a redstone signal as well by attaching a lever to the same block the sign is also attached to. Only a few signs activate the lever, like the station sign that activates it when trains stop on top of the station.

Activation Direction

By default signs only activate when the train sees the front or sides of the sign. This means you should place signs facing the direction of train movement. To override this behavior you can set these activation directions by adding a colon (:) followed by one or more directions. If you want the sign to always respond, just use [train:*].

For example, [-train:lr] on a switcher sign would activate a lever when a train enters from either the sign-relative left or right direction and doesn't for the remaining ones. It uses -train so that it does not switch the track.

Remote Control

A few sign systems support remote control: the ability to control trains by name. You then use the [train <name>] format, or the shorter alias [t <name>]. Remotely controlled signs only respond to redstone changes, thus where you place them is not important. So far the property, destination, destroy, eject and setblock sign systems support remote control.

Remote control can also affect multiple trains. Just like the tag system, remote control uses *-signs to identify the trains to affect. For example, the following remote control sign will set the destination to home for all intercity trains:

[train Intercity*]

property

destination

interhome

You can use this to recall all your trains easily. If you use tags to navigate trains, you can also add a tag saying that the train should return.

Placement

Empty minecarts are blocked

Trains are switched left and right using a 1:1 counter

Each sign targets a certain track piece above. Signs attached to walls take the block they are attached to and look up until they find a piece of track. That track is then used for that sign. Sign posts look up until they find a piece of track. There may not be blocks without signs between the bottom sign and the tracks.

You can make a pillar of blocks below a single track piece and attach signs to it, to make a bundle of actions on a single track piece. Trains look down when they enter a new track piece to check for signs, so make sure you put the output signs above the signs that use this output for correct results.

A noticeable exception would be add-ons for the TrainCart plugin, which may change the (relative) position a sign would need to be placed on in order to work for the track. For example, would the TC Hang Rail add-on require you to add the signs above the Hang rail track to work, while the TCC (TrainCarts Coasters) add-on uses the block of a node for the sign, which can be moved to any other block.

For most signs the sign direction influences what happens, as also discussed earlier (Activation Direction):

The train has to face the text on the sign to make the sign respond
Signs with the same alignment as the tracks (faces to or away from the tracks) always respond
The train is spawned in the direction the sign faces

Types

Animate - play an animation configured in the train's attachments
Announce - sends a message to players in the cart and/or train above
Blocker - blocks trains coming from a certain direction
Block Changer - change the block types displayed in a minecart
Craft - crafts items inside the storage minecarts of a train using a nearby workbench
Destination - marks a destination for the path finding and sets the next destination for the train
Destroy - destroy trains
Detector - detect trains on a set region of rails
Effect - plays a particle or sound effect at the minecart, train or sign
Eject - eject trains (let passengers exit)
Elevator - teleports trains including passengers up and down to another elevator
Enter - lets nearby players and/or mobs enter the train
Flip - Lets you flip a cart 180 degrees
Launcher - launch or brake trains to start moving at a desired speed
(Smart) Mutex - prevents train collisions at intersections by blocking multiple trains from entering the same area
Property - set properties on the train such as tags, destinations and owners
Skip - skips execution of signs up ahead based on statements
Sound - plays a named sound effect
Spawn - spawn an entire train, cart types can be set
Station - stop and launch trains
Switcher - switch levers and rails based on properties on the train
Teleport - teleport trains including passengers (requires MyWorlds)
Transfer - transfer items between trains and chests/furnaces/dispensers
Trigger - display train information and a countdown of the arrival time of trains on signs (requires SignLink)
Ticket - let passengers pay for a ride (requires Vault)
Waiter - waits the train until the track is clear of other trains

Permissions

Each sign has a separate build permission. See the main permissions page. For using remote control, the player requires the train.build.feature.remotecontrol permission which is OP-only by default.

TrainCarts/控制牌

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