The journey

Every space. One XDL.

Every space is part of the rich journey, brought to life in the XDL — a set of states connected by transitions driven by sensors, perception signals, and timers. Fallover paths guarantee every guest group advances even if a sensor faults or a timer fires.

The signature moment

The reveal.

At the emotional peak of the underground, two characters appear as projected presences on a hologram in the centre of the room — among the audience. A silent recognition across the room: you're the one I've been hearing.

// safety block — halts the hologram cue if the room isn’t armed
safety {
  hologram_reveal_safety {
    when:        presence_level.value > 0.9 && not property("hologram_reveal_armed")
    ensure:      halt_pipeline("hologram_reveal_pipeline")
    response:    hard_stop
    on_recovery: notify(template: "hologram_reveal_restored", channel: "operator")
    fallback:    notify(template: "hologram_reveal_not_armed", channel: "operator")
  }
}

Source · experience.xdl · safety block

How OpenXP runs it

Three layers. One immutable blueprint.

// a slice of the WonderRoom CAVE — first light rises through wonder
state first_light_room_wakes {
  arc_phase: rise
  moment_type: rise
  stage: "threshold"
  intent: "First light rises as guests settle into the chamber"
  perception_target {
    wonder: { min: 0.4, max: 0.8, ramp: gentle }
  }

  on_enter {
    do: output.scene(name: "cave_first_light_rising")
    do: wonder_room_lfa.pulse(intensity: 0.35)
    do: wonder_room_spatial_audio.play(cue: "heartbeat")
    do: start_timer(name: "first_light_complete", seconds: 18)
  }

  on timer.first_light_complete.expired -> chapter_1_wonder_room_start {
    intent: "Timer expires — hand off to Chapter 1"
    do: award_moment(type: "wonder_room_awakened")
  }

  on wonder_level.change -> chapter_1_wonder_room_start {
    guard: wonder_level.value >= 0.75
    intent: "Collective wonder peaks early — advance ahead of timer"
    do: award_moment(type: "wonder_peak_early")
  }

  on wonder_room_media_server.signal_lost -> chapter_1_wonder_room_start {
    intent: "Fallover: media server signal lost during first light"
    do: notify(profile: "operator", template: "hardware_fault")
  }
}

Source · experience.xdl

Perception

Signals read the room — the room responds.

Perception signals turn ambient behaviour — an audience leaning in, a group calming, the tension of a held beat — into signals that the OpenXP runtime can act on - such as cue density, haptic intensity, and narrative pacing.

Scale

What the XDL blueprint contains.