Feedback System

The Feedback System provides the concrete implementation of GS_Juice’s game feel effects. It includes the FeedbackEmitter component for playback, FeedbackMotionAsset for data storage, and two concrete track types for transform and material animation.

For usage guides and setup examples, see The Basics: GS_Juice.

Contents

• FeedbackEmitter
• FeedbackMotionAsset
• FeedbackTransformTrack
• FeedbackMaterialTrack
• See Also

FeedbackEmitter

The FeedbackEmitter component plays a Feedback Motion on its entity or on a specified target entity.

Inspector Properties

API Reference

FeedbackMotionAsset

The data asset that defines a feedback effect. Created and edited in the O3DE Asset Editor with the .feedbackmotion extension. Extends GS_Core::GS_MotionAsset → AZ::Data::AssetData. Requires GS_AssetReflectionIncludes.h when reflecting — see Serialization Helpers.

Properties

Methods

To understand how to author Feedback Motions, refer to Feedback: Authoring Feedback Motions

FeedbackTransformTrack

Animates entity transform properties. All fields use gradient types for full curve control.

The track captures the entity’s origin transform on Init() and applies offsets relative to it. Effects are additive — multiple transform tracks on the same entity stack correctly.

FeedbackMaterialTrack

Animates entity material properties via the render component.

Adding Custom Tracks

Use the FeedbackMotionTrack ClassWizard template to generate a new world-space track — see GS_Juice Templates. The only manual step after generation is adding a Reflect(context) call in {$Gem}DataAssetSystemComponent.cpp. Once reflected, the new track type is discovered automatically and appears in the asset editor type picker.

Override Init(ownerEntityId) to cache entity context, and Update(easedProgress) to drive the target property via its bus.

void ${Custom}Track::Init(AZ::EntityId ownerEntity)
{
    // Always call the base first — it sets m_owner.
    GS_Juice::FeedbackMotionTrack::Init(ownerEntity);

    // Cache the entity's origin value so the track can apply additive offsets.
    // Example:
    //   AZ::TransformBus::EventResult(m_originPosition, ownerEntity, &AZ::TransformInterface::GetWorldTranslation);
    //   AZ::TransformBus::EventResult(m_originRotation, ownerEntity, &AZ::TransformInterface::GetWorldRotationQuaternion);
}

void ${Custom}Track::Update(float easedProgress)
{
    // Evaluate the gradient at the current eased progress and apply to the entity.
    // easedProgress is in [0, 1] and already passed through the track's CurveType.
    // Example:
    //   const AZ::Vector3 offset = valueGradient.Evaluate(easedProgress);
    //   AZ::TransformBus::Event(m_owner, &AZ::TransformInterface::SetWorldTranslation, m_originPosition + offset);
}

See Also

For conceptual overviews and usage guides:

• The Basics: Juice

For component references:

• GS_Juice Overview

For related resources:

• Framework API: GS_Motion

Get GS_Juice

GS_Juice — Explore this gem on the product page and add it to your project.