Needle Engine Documentation
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Downloads
  • What is Needle Engine?
  • Testimonials
  • Get an overview

    • Samples and Showcase
    • Our Vision 🔮
    • Feature Overview
    • Technical Overview
  • Resources

    • Pricing and Plans
    • Changelog
    • API Documentation
    • Support & Community
  • Integrations

    • Needle Engine for Unity
    • Needle Engine for Blender
    • Needle Engine as Web Component
    • Needle Engine on your Website
    • Needle Cloud
  • Topics

    • Web Project Structure
    • Everywhere Actions
    • Exporting Assets to glTF
    • Frameworks, Bundlers, HTML
    • Testing on local devices
    • Deployment and Optimization
  • Advanced

    • Networking
    • VR & AR (WebXR)
    • Using Needle Engine directly from HTML
    • Editor Sync
  • Troubleshooting

    • How To Debug
    • Questions and Answers (FAQ) 💡
    • Get Help
  • Videos

    • Tutorials on Youtube
    • Interviews on Youtube
  • Scripting Overview

    • Scripting in Needle Engine
    • Scripting Introduction for Unity Developers
    • Needle Core Components
    • Everywhere Actions
  • Components and Lifecycle

    • Creating and using Components
    • @serializable and other decorators
    • Automatic Component Generation
    • Scripting Examples
    • Community Contributions
    • Additional Modules
  • Settings and APIs

    • <needle-engine> Configuration
    • needle.config.json
    • Needle Engine API
    • three.js API
Help
Samples
Pricing
  • Needle Website
  • Needle Cloud
  • Support Community
  • Discord Server
  • X/Twitter
  • YouTube
  • Newsletter
  • Email
  • Feedback
  • Github
  • English
  • 简体中文
  • Español
  • Português
  • Français
  • हिन्दी
  • 日本語
  • Deutsch
  • Tiếng Việt
  • Getting Started

    • Downloads
    • Needle Engine for Unity
    • Needle Engine for Blender
    • Needle Engine as Web Component
    • Needle Engine on your Website
    • Needle Cloud
    • Custom integrations
    • Support and Community
  • Core Concepts

    • Web Project Structure
    • Everywhere Actions
    • Exporting Assets to glTF
    • Frameworks, Bundlers, HTML
    • Testing on local devices
    • Deployment and Optimization
    • How To Debug
    • Questions and Answers (FAQ) 💡
  • Scripting

    • Scripting in Needle Engine
    • Scripting Introduction for Unity Developers
    • Creating and using Components
    • Automatic Component Generation
    • Scripting Examples
    • Community Contributions
  • Advanced

    • VR & AR (WebXR)
    • Networking
    • Editor Sync
  • Reference

    • Feature Overview
    • Technical Overview
    • Needle Core Components
    • needle.config.json
    • <needle-engine> Configuration
    • @serializable and other decorators

Overview

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Everywhere Action: Emphasize on Click

Example for adding custom USDZ behaviours for iOS AR

This is an USDZ / iOS AR only example

export class EmphasizeOnClick extends Behaviour implements UsdzBehaviour {

    @serializable()
    target?: Object3D;

    @serializable()
    duration: number = 0.5;

    @serializable()
    motionType: MotionType = MotionType.bounce;

    beforeCreateDocument() { }

    createBehaviours(ext, model, _context) {
        if (!this.target) return;

        if (model.uuid === this.gameObject.uuid) {
            const emphasize = new BehaviorModel("emphasize " + this.name,
                TriggerBuilder.tapTrigger(this.gameObject),
                ActionBuilder.emphasize(this.target, this.duration, this.motionType, undefined, "basic"),
            );
            ext.addBehavior(emphasize);
        }
    }

    afterCreateDocument(_ext, _context) { }
}