Start Speed Tracking & Stop Speed Tracking

Overview

Use Start Speed Tracking to monitor how fast a learner is moving an object in the 3D scene. This is useful for procedures that require careful, slow movements. Use Stop Speed Tracking to end monitoring. Speed tracking enables you to enforce safe handling practices — for example, requiring a learner to move a delicate component slowly, or detecting reckless, fast movements.

Start Speed Tracking

When to Use

Enforce slow, careful movements — Ensure learners move fragile objects at safe speeds
Detect unsafe handling — Flag movement speeds that violate safety practices
Quality control training — Require precision and care during assembly or handling
Hazmat procedures — Enforce careful movement of hazardous materials
Simulation realism — Model real-world constraints on movement speed

Parameters

Parameter	Type	Required	Description
Object	String	Yes	The identifier of the object to monitor (e.g., “vial”, “circuit-board”)
Threshold	Number	Yes	The maximum allowed speed (in units per second)
Unit	String	No	Measurement unit: `"m/s"` (meters/second, default), `"cm/s"`, or `"units/s"`

Example 1: Careful Vial Movement

Action: Start Speed Tracking
Object: "vial"
Threshold: 0.5
Unit: "m/s"

The vial is being tracked. If the learner moves it faster than 0.5 meters per second, the speed threshold is violated.

Example 2: Circuit Board Assembly

Action: Start Speed Tracking
Object: "circuit-board"
Threshold: 0.3
Unit: "m/s"

The circuit board must be moved at or below 0.3 m/s — a slow, deliberate pace.

Example 3: High-Precision Component

Action: Start Speed Tracking
Object: "precision-component"
Threshold: 20
Unit: "cm/s"

20 cm/s is very slow movement, suitable for extremely fragile components.

Stop Speed Tracking

When to Use

End monitoring after the movement phase is complete
Disable speed tracking before transitioning to the next step
Stop tracking all objects after a handling sequence

Parameters

Parameter	Type	Required	Description
Object	String	Optional	The identifier of a specific object to stop tracking. Omit to stop tracking all objects

Example 1: Stop Tracking One Object

Action: Stop Speed Tracking
Object: "vial"

Vial speed tracking stops. Other tracked objects (if any) continue to be monitored.

Example 2: Stop Tracking All Objects

Action: Stop Speed Tracking

All active speed tracking is disabled.

Best Practices

Pair with other constraints

Combine Start Speed Tracking with Set Interactable Objects to ensure only the target object can be moved.

Provide feedback on violations

Use Show Red Vignette or Show Text to give immediate visual or text feedback when speed is exceeded.

Test thresholds

Verify your speed thresholds are achievable and realistic. Test on different devices — mobile vs. desktop handling feels different.

Stop tracking in onExit

Always Stop Speed Tracking in the onExit actions to clean up before the next state.

Use transitions on violations

Connect speed-violation events to penalty states (subtract points, retry, warning, etc.).

Common Patterns

Careful Handling Procedure

State: HandleVial
  onEntry:
    → Set Interactable Objects (["vial"], true)
    → Start Speed Tracking
        Object: "vial"
        Threshold: 0.5
        Unit: "m/s"
    → Show Panel
        Title: "Handle with Care"
        Display Text: "Move the vial slowly and carefully. Do not exceed 0.5 m/s."
        Billboard: true

  transitions:
    - event: "speed-violation"
      action: Show Red Vignette
      target: "HandleVialSpeedViolation"
    - event: "vial-placed-correctly"
      target: "VialPlacedSuccess"

  onExit:
    → Stop Speed Tracking (Object: "vial")
    → Hide Panel

The learner is monitored while moving the vial. Exceeding the speed limit triggers a penalty state.

Assembly With Speed Requirements

State: AssembleComponentSlowly
  onEntry:
    → Set Interactable Objects (["component-a", "component-b"], true)
    → Start Speed Tracking
        Object: "component-a"
        Threshold: 0.3
        Unit: "m/s"
    → Show Text "Assemble carefully. Move slowly to avoid damage."

  transitions:
    - event: "speed-violation"
      action:
        - Show Red Vignette
        - Show Text "Too fast! Slow down."
      target: "AssembleComponentSlowly"
    - event: "assembly-complete"
      action: Record achievement "Completed with proper care"
      target: "AssemblySuccess"

  onExit:
    → Stop Speed Tracking
    → Hide Text

If the learner moves too fast, they see a red vignette and try again. Completing the assembly slowly records an achievement.

Multi-Object Handling

State: TransferLiquidSlowly
  onEntry:
    → Start Speed Tracking
        Object: "source-beaker"
        Threshold: 0.4
        Unit: "m/s"
    → Start Speed Tracking
        Object: "target-beaker"
        Threshold: 0.2
        Unit: "m/s"
    → Show Panel
        Title: "Transfer Liquid"
        Display Text: "Pour carefully. Source beaker ≤ 0.4 m/s, target beaker ≤ 0.2 m/s"
        Billboard: true

  transitions:
    - event: "speed-violation"
      action: Show Red Vignette
      target: "TransferLiquidSlowly"
    - event: "transfer-complete"
      target: "TransferSuccess"

  onExit:
    → Stop Speed Tracking
    → Hide Panel

Two objects are tracked simultaneously with different thresholds. Both must meet their speed requirements.

Speed Violation Events

Speed tracking typically fires a "speed-violation" event when the threshold is exceeded. Use this event to:

Transition to a penalty or retry state
Show corrective feedback
Apply a score reduction
Display a warning message
Trigger visual feedback (red vignette)

Set Interactable Objects — Restrict interactions to only the object being speed-tracked
Show Red Vignette — Provide visual feedback on speed violations
Show Text — Display speed requirements and warnings
Show Panel — Show detailed instructions about speed constraints

Creator App

Workflow

Transitions

Variables

Actions — Training Control

Actions — Step Instructions

Actions — Media Playback

Actions — Object Manipulation

Actions — UI Control

Actions — Speed & Time

Actions — Training Feedback

Actions — Hand & Tool Visualization

Overview