API Reference


exists(actor)

Checks if the given actor exists.

This is useful if you have a reference to an actor that could be either unset or could refer to an actor that no longer exists. For example, if your reference is set from a script property (see props), then the user of your script (which could be you!) might have forgotten to set the actor reference.

So, when in doubt, check.

Parameters:
Name Type Description
actor ActorRef The actor to check.
Example
export const PROPS = [
  propActor("target")
]

export function onTick() {
  if (!exists(props.target)) {
    // User forgot to assign an actor to our "target" property,
    // or the assigned actor was deleted.
    log("Turret has no target set! Fix this in the Inspector!");
    cooldown(5);
  }
}

< All Functions
Transform
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Scale
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Actors
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Attributes
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Cloning
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Properties
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Memory
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Messages
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Rendering
Visibility
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Body
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Color
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Velocity
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Player Controls (high level input)
Actions
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Controls
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Low Level Input
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Multiplayer
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Events
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User Interface
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Widgets
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Screen
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Terrain
Blocks
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Sound
SFX
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Polite Requests
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Misc
Time
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Math
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Game
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Util
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(Advanced) Cards
Cards
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Reference
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