Setting up the entity that owns the anchor in the Sumerian AR scene.

AnchorPositioning.js

// Import Sumerian scripts
import * as s from 'module://sumerian-common/api';
import * as si from 'module://sumerian-common/internal';

export default class AnchorPositioningNew extends s.Action {

	static get PROPERTIES() {
		return {
			// Optional property to set the owner of the AR anchor
			anchorEntity: {
				// Property should be a reference to another entity in the scene
				type: s.type.Entity,
				// Description for the Amazon Sumerian web UI
				description: 'Attach Anchor to this Entity'
			}
		};
	}

	start(ctx) {
		// Setting up global communication
		// -------------------------------------------------------------------
		// Create / establish reference to global placeMode setting variable.
		// This should be accessible by all components in the scene, so that
		// others can for example pause their animations while the user is
		// re-positioning the object.
		// All variables created with this are stored in this object instance
		// and are therefore persisted and accessible from other functions in
		// this class.
		this.placeMode = ctx.world.value('placeMode');
		// Initially, set the place mode to false.
		this.placeMode.set(false);
		// Get a reference to the WorldPlaced event.
		// This is also a global (world) event. This script will emit the
		// event once the user finished placing the scene contents.
		this.worldPlacedEvent = ctx.world.event('WorldPlaced');
	}
}