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Shell Engine

Run Conditions

Run conditions gate a system on global action state. They require InputManagerPlugin to be configured with globalMap.

import { ActionPressed, ActionJustPressed, ActionJustReleased } from '@shell/input-manager';


const JumpSystem = Define.system()
  .runIf(ActionJustPressed('jump'))
  .update(() => {
    // runs only on the frame jump was pressed
  });

Conditions

Section titled “Conditions”
ConditionDescription
ActionPressed(action)true while the action is held
ActionJustPressed(action)true for one frame on press
ActionJustReleased(action)true for one frame on release

Each condition reads from the actionState resource updated by GlobalInputSystem.