TrainCarts/Commands/Selectors

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Introduction

Traincarts adds command selectors that can be used to target trains, or passengers of trains, similar to how vanilla minecraft's @e selector works. Besides the usual position-based selector filters, other train properties can be used to select trains that match specific criteria. These selectors can be used with other plugins. If a selector targets more than one player/train, then the entire command is repeated for every player/train result.

Two selectors exist: @train and @ptrain. Both accept identical selector conditions, which will be discussed on the rest of this page.

To quickly view what conditions are available in-game, use a Traincarts command like /train info --train @ptrain[ which will then auto-complete and show suggestions of supported conditions.

Quick Command Examples

Example Description
/say hello @ptrain[distance=..5] Message "hello" to the passengers of all trains 5 blocks away or less
/kick @ptrain[name=train23] Kicks players inside train with name 'train23'
/train destroy --train @train[destination=InterState5] Destroy the trains heading for InterState5
/train eject --train @train[dx=-2..2,dy=-3..3,dz=-2..2] Eject the trains within a cuboid range of the sender
/train launch 0.5 --options 2 --train @train[tag=express] Launches the train with tag 'express' to a speed of 0.5 over 2 blocks distance

Conditions

Multiple conditions can be specified, which are all AND-ed together. All number-based conditions support Minecraft range syntax: a..b. For example, -5..5 (-5 to 5), ..6 (6 or less) and 12.. (12 or more). Prefixing the condition value with ! will make it evaluate as 'not'.

In all examples below @train can be substituted with @ptrain to instead target the player passengers of the trains.


Position Cuboid

The x/y/z conditions specify where on the world trains should be selected. This specifies a cuboid range. The dx/dy/dz can also be specified to grow this cuboid. If only dx/dy/dz are specified, then the x/y/z of the sender is used. The world condition can optionally be specified to operate on other worlds, or to run from a server terminal where no world can be inferred.

@train[x=10..12,y=23..56,z=-100..-80] All trains in cuboid (10, 23, -100) -> (12, 56, 80)
@train[x=10,y=23,z=-100,dx=2,dy=33,dz=20] Same as above, but specified with dx/dy/dz to 'grow' the cuboid
@train[x=10,y=10,z=10,dx=-2..2,dy=-10..10,dz=-2..2] Complex use: grows the cuboid from point (10, 10, 10) in both directions. This becomes cuboid (8, 0, 8) -> (12, 20, 12)
@train[dx=-10..10,dy=-5..5,dz=-10..10] Selects a cuboid around the sender (command block / player) of the command
@train[world=world_the_end,x=10,y=89,z=-20,dx=-10..10,dy=-10..10,dz=-10..10] The world name to target can be used to target trains on other worlds

Distance

The distance condition filters trains based on distance to the sender, or a cuboid specified. This is a spherical distance.

@train[distance=..10] All trains 10 blocks or less away from the sender
@train[distance=1000..] All trains 1000 blocks away or more from the sender
@train[x=100,y=50,z=-100,distance=..5] All trains 5 blocks or less away from coordinate (100, 50, -100)
@train[x=10,y=10,z=10,dx=50,dz=50,distance=..10] All trains 10 blocks or less away from cuboid (10, 10, 10) -> (60, 10, 60)


Sort and Limit

The sort and limit conditions can be used to pick a single result from many based on distance, or to pick limited results at random. Sort supports conditions nearest, furthest and random. Limit must be a natural integer.

@train[distance=..100,sort=random,limit=1] Picks a single random train 100 blocks away or less
@train[distance=..100,sort=nearest,limit=2] Picks at most 2 nearest trains, 100 blocks away or less
@train[distance=1000..,sort=furthest,limit=10] Picks at most 10 trains furthest away, 1000 blocks distance away or more


Train Name

The name condition can be used to select trains by name, or a name pattern. Supports the same wildcard pattern rules as the remote control syntax.

@train[name=train12] Selects train with name 'train12'
@train[name=Intercity*Express] Selects trains with name starting with "Intercity" and ending with "Express"
@train[name=*] Selects all trains on the world


Train Tags

The tag condition, which can be specified multiple times, can be used to select the tags assigned to trains and filter on those. Like the name condition, this supports a wildcard pattern. This only checks that a particular tag is or isn't present, not that it is the only tag present.

@train[tag=mytag] Selects trains that have tag 'mytag'
@train[tag=*fast,tag=!express] Selects trains that have a tag ending with 'fast', but do not have tag 'express'


Passenger Count

The passengers and playerpassengers conditions select the trains that meet a certain number of (player) passengers. This supports the range command to check for 'at least' a number of passengers, such as @train[passengers=5..]

Derailed

The derailed condition selects trains that have derailed. For example: @train[derailed=1] or @train[derailed=true]

Unloaded

The unloaded condition selects trains that are inside unloaded chunks and are therefore no longer simulated. Example: @train[unloaded=1] or @train[unloaded=true]. Trains that keep chunks loaded do not unload.

Speed

The speed condition (alias: velocity) selects trains that move at a certain speed. This is the actual movement speed, which is at most the speed limit set for the train. Example: @train[speed=0] for trains that are not moving.

Miscellaneous Properties

More might be added in the future, but the additional properties can be used to filter the selection

destination Destination set for the train
friction Friction modifier of the train (default: 1)
gravity Gravity modifier of the train (default: 1)
keepchunksloaded Whether the train keeps nearby chunks loaded
speedlimit Speed limit set for the train
ticket Same checks as for tags, but for ticket names instead